diff --git a/Documentation/gpu/drm-internals.rst b/Documentation/gpu/drm-internals.rst
index 966bd2d9f0ccd5fd39d826012f750c94163d7479..bf8ac005a3713cdfc693bbd4ebd00d88a03ae598 100644
--- a/Documentation/gpu/drm-internals.rst
+++ b/Documentation/gpu/drm-internals.rst
@@ -132,6 +132,12 @@ be unmapped; on many devices, the ROM address decoder is shared with
 other BARs, so leaving it mapped could cause undesired behaviour like
 hangs or memory corruption.
 
+Managed Resources
+-----------------
+
+.. kernel-doc:: drivers/gpu/drm/drm_managed.c
+   :doc: managed resources
+
 Bus-specific Device Registration and PCI Support
 ------------------------------------------------
 
diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index 56a80ff2b070510acd1220b37c326dd952c56dff..8658670537b42a7236f751d1f90553720db90d23 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -17,7 +17,8 @@ drm-y       :=	drm_auth.o drm_cache.o \
 		drm_plane.o drm_color_mgmt.o drm_print.o \
 		drm_dumb_buffers.o drm_mode_config.o drm_vblank.o \
 		drm_syncobj.o drm_lease.o drm_writeback.o drm_client.o \
-		drm_client_modeset.o drm_atomic_uapi.o drm_hdcp.o
+		drm_client_modeset.o drm_atomic_uapi.o drm_hdcp.o \
+		drm_managed.o
 
 drm-$(CONFIG_DRM_LEGACY) += drm_legacy_misc.o drm_bufs.o drm_context.o drm_dma.o drm_scatter.o drm_lock.o
 drm-$(CONFIG_DRM_LIB_RANDOM) += lib/drm_random.o
diff --git a/drivers/gpu/drm/arc/arcpgu_hdmi.c b/drivers/gpu/drm/arc/arcpgu_hdmi.c
index 98aac743cc26200ff46aec1e8c283a02075512aa..8fd7094beecef24efed1ccbe219a329330292057 100644
--- a/drivers/gpu/drm/arc/arcpgu_hdmi.c
+++ b/drivers/gpu/drm/arc/arcpgu_hdmi.c
@@ -5,6 +5,7 @@
  * Copyright (C) 2016 Synopsys, Inc. (www.synopsys.com)
  */
 
+#include <drm/drm_bridge.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_encoder.h>
 #include <drm/drm_device.h>
diff --git a/drivers/gpu/drm/bridge/analogix-anx78xx.c b/drivers/gpu/drm/bridge/analogix-anx78xx.c
index 56df07cdab68f6dab2fdee567af959d2e119b89f..9c9b9543aeceda87e91bfcf37b2855bfccebe326 100644
--- a/drivers/gpu/drm/bridge/analogix-anx78xx.c
+++ b/drivers/gpu/drm/bridge/analogix-anx78xx.c
@@ -19,6 +19,7 @@
 #include <linux/types.h>
 
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_dp_helper.h>
 #include <drm/drm_edid.h>
diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
index df606a56756635ced8cedb39ef011dc5aea3b1bd..f011e8315ae21d82f1db7cfdb01bb02bf7e16e38 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
@@ -21,6 +21,7 @@
 #include <drm/bridge/analogix_dp.h>
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_device.h>
 #include <drm/drm_panel.h>
diff --git a/drivers/gpu/drm/bridge/dumb-vga-dac.c b/drivers/gpu/drm/bridge/dumb-vga-dac.c
index 7aa789c358829b05a32e9d8dfe2961cfc7efe6a5..cc33dc411b9e8526992b6760d0868ecf5b2266e0 100644
--- a/drivers/gpu/drm/bridge/dumb-vga-dac.c
+++ b/drivers/gpu/drm/bridge/dumb-vga-dac.c
@@ -12,6 +12,7 @@
 #include <linux/regulator/consumer.h>
 
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_print.h>
 #include <drm/drm_probe_helper.h>
diff --git a/drivers/gpu/drm/bridge/megachips-stdpxxxx-ge-b850v3-fw.c b/drivers/gpu/drm/bridge/megachips-stdpxxxx-ge-b850v3-fw.c
index 14d578fce09f9e7465acadce025fbf3a3bd95cea..3e9bb87c1b300da675c50d43da9cd0c687f150e4 100644
--- a/drivers/gpu/drm/bridge/megachips-stdpxxxx-ge-b850v3-fw.c
+++ b/drivers/gpu/drm/bridge/megachips-stdpxxxx-ge-b850v3-fw.c
@@ -25,6 +25,7 @@
 
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_edid.h>
 #include <drm/drm_print.h>
 #include <drm/drm_probe_helper.h>
diff --git a/drivers/gpu/drm/bridge/nxp-ptn3460.c b/drivers/gpu/drm/bridge/nxp-ptn3460.c
index d4a1cc5052c32921d0893052789f44144eb2801d..57ff01339559768487a2830a835156ec01020902 100644
--- a/drivers/gpu/drm/bridge/nxp-ptn3460.c
+++ b/drivers/gpu/drm/bridge/nxp-ptn3460.c
@@ -11,6 +11,7 @@
 #include <linux/module.h>
 #include <linux/of.h>
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_edid.h>
 #include <drm/drm_of.h>
diff --git a/drivers/gpu/drm/bridge/panel.c b/drivers/gpu/drm/bridge/panel.c
index b12ae3a4c5f11b243e8440f1ffd6e6ed0c1f0633..6cffeb4a42f2d1d5a6ea2a5597181ce04b3e24b1 100644
--- a/drivers/gpu/drm/bridge/panel.c
+++ b/drivers/gpu/drm/bridge/panel.c
@@ -5,6 +5,7 @@
  */
 
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_connector.h>
 #include <drm/drm_encoder.h>
 #include <drm/drm_modeset_helper_vtables.h>
diff --git a/drivers/gpu/drm/bridge/parade-ps8622.c b/drivers/gpu/drm/bridge/parade-ps8622.c
index 93c68e2e9484fd9f9553ccf5fce11b0ae0f8dada..b7a72dfdcac3c77d04c29576a3d1c0b20facacb3 100644
--- a/drivers/gpu/drm/bridge/parade-ps8622.c
+++ b/drivers/gpu/drm/bridge/parade-ps8622.c
@@ -17,6 +17,7 @@
 #include <linux/regulator/consumer.h>
 
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_of.h>
 #include <drm/drm_panel.h>
diff --git a/drivers/gpu/drm/bridge/sii902x.c b/drivers/gpu/drm/bridge/sii902x.c
index 38f75ac580df48ad47deff264eb4467b6d06b1ba..b70e8c5cf2e13806f8361c1ccb4441cc5193be14 100644
--- a/drivers/gpu/drm/bridge/sii902x.c
+++ b/drivers/gpu/drm/bridge/sii902x.c
@@ -20,6 +20,7 @@
 #include <linux/clk.h>
 
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_drv.h>
 #include <drm/drm_edid.h>
 #include <drm/drm_print.h>
diff --git a/drivers/gpu/drm/bridge/sii9234.c b/drivers/gpu/drm/bridge/sii9234.c
index 25d4ad8c7ad65d23ee36a7a245e04ee155b504f1..ad00d841ed9ebf3922eea73bda0d9f2010e233b7 100644
--- a/drivers/gpu/drm/bridge/sii9234.c
+++ b/drivers/gpu/drm/bridge/sii9234.c
@@ -13,6 +13,7 @@
  *    Dharam Kumar <dharam.kr@samsung.com>
  */
 #include <drm/bridge/mhl.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_edid.h>
 
diff --git a/drivers/gpu/drm/bridge/sil-sii8620.c b/drivers/gpu/drm/bridge/sil-sii8620.c
index 970bc00d2aaf6d3047de00b4bc431ada59968a26..337c2f690655d7af314ef0a2a997756efd161d46 100644
--- a/drivers/gpu/drm/bridge/sil-sii8620.c
+++ b/drivers/gpu/drm/bridge/sil-sii8620.c
@@ -9,6 +9,7 @@
 #include <asm/unaligned.h>
 
 #include <drm/bridge/mhl.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_edid.h>
 #include <drm/drm_encoder.h>
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index 41bf4aaff21c4610ced41a32461d33ab66b4bb4a..8d35da99ea0b45bbc54babfd43f57cbd49e60464 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -26,6 +26,7 @@
 
 #include <drm/bridge/dw_hdmi.h>
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_edid.h>
 #include <drm/drm_of.h>
 #include <drm/drm_print.h>
diff --git a/drivers/gpu/drm/bridge/tc358764.c b/drivers/gpu/drm/bridge/tc358764.c
index 170f162ffa5586599079e9766db1e2cf0b2a4af6..db298f550a5adfc7d7317c67ae7d7a2b77c5d425 100644
--- a/drivers/gpu/drm/bridge/tc358764.c
+++ b/drivers/gpu/drm/bridge/tc358764.c
@@ -16,6 +16,7 @@
 #include <video/mipi_display.h>
 
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_fb_helper.h>
 #include <drm/drm_mipi_dsi.h>
diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c
index 0454675a44cb7a7ccddbe1a3fb8d0026e4009a82..63645083f384d4191422784d3195301586bbfcee 100644
--- a/drivers/gpu/drm/bridge/tc358767.c
+++ b/drivers/gpu/drm/bridge/tc358767.c
@@ -26,6 +26,7 @@
 #include <linux/slab.h>
 
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_dp_helper.h>
 #include <drm/drm_edid.h>
 #include <drm/drm_of.h>
diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
index 20ea1c6bc8bb5cdba9cbe52ae42570a89aefc147..1361b83733272d7f7ee5782c1ead7b51bea774ee 100644
--- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c
+++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
@@ -17,6 +17,7 @@
 
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_dp_helper.h>
 #include <drm/drm_mipi_dsi.h>
 #include <drm/drm_of.h>
diff --git a/drivers/gpu/drm/bridge/ti-tfp410.c b/drivers/gpu/drm/bridge/ti-tfp410.c
index 61cc2354ef1bfe7eb09a6d93b9d7c22b3ed4c713..aa3198dc9903cefb70f74ce815352752434a91f9 100644
--- a/drivers/gpu/drm/bridge/ti-tfp410.c
+++ b/drivers/gpu/drm/bridge/ti-tfp410.c
@@ -14,6 +14,7 @@
 #include <linux/platform_device.h>
 
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_print.h>
 #include <drm/drm_probe_helper.h>
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index 62b77f3a950b8399caa4a06ed403c76326032c90..426193cd99a0d2db40b2b3bb099367a3f9b01073 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -31,6 +31,7 @@
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_atomic_uapi.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_damage_helper.h>
 #include <drm/drm_device.h>
 #include <drm/drm_plane_helper.h>
@@ -429,6 +430,7 @@ mode_fixup(struct drm_atomic_state *state)
 	for_each_new_connector_in_state(state, connector, new_conn_state, i) {
 		const struct drm_encoder_helper_funcs *funcs;
 		struct drm_encoder *encoder;
+		struct drm_bridge *bridge;
 
 		WARN_ON(!!new_conn_state->best_encoder != !!new_conn_state->crtc);
 
@@ -445,7 +447,8 @@ mode_fixup(struct drm_atomic_state *state)
 		encoder = new_conn_state->best_encoder;
 		funcs = encoder->helper_private;
 
-		ret = drm_bridge_chain_mode_fixup(encoder->bridge,
+		bridge = drm_bridge_chain_get_first_bridge(encoder);
+		ret = drm_bridge_chain_mode_fixup(bridge,
 					&new_crtc_state->mode,
 					&new_crtc_state->adjusted_mode);
 		if (!ret) {
@@ -503,6 +506,7 @@ static enum drm_mode_status mode_valid_path(struct drm_connector *connector,
 					    struct drm_crtc *crtc,
 					    const struct drm_display_mode *mode)
 {
+	struct drm_bridge *bridge;
 	enum drm_mode_status ret;
 
 	ret = drm_encoder_mode_valid(encoder, mode);
@@ -512,7 +516,8 @@ static enum drm_mode_status mode_valid_path(struct drm_connector *connector,
 		return ret;
 	}
 
-	ret = drm_bridge_chain_mode_valid(encoder->bridge, mode);
+	bridge = drm_bridge_chain_get_first_bridge(encoder);
+	ret = drm_bridge_chain_mode_valid(bridge, mode);
 	if (ret != MODE_OK) {
 		DRM_DEBUG_ATOMIC("[BRIDGE] mode_valid() failed\n");
 		return ret;
@@ -1001,6 +1006,7 @@ disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state)
 	for_each_oldnew_connector_in_state(old_state, connector, old_conn_state, new_conn_state, i) {
 		const struct drm_encoder_helper_funcs *funcs;
 		struct drm_encoder *encoder;
+		struct drm_bridge *bridge;
 
 		/* Shut down everything that's in the changeset and currently
 		 * still on. So need to check the old, saved state. */
@@ -1037,7 +1043,8 @@ disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state)
 		 * Each encoder has at most one connector (since we always steal
 		 * it away), so we won't call disable hooks twice.
 		 */
-		drm_atomic_bridge_chain_disable(encoder->bridge, old_state);
+		bridge = drm_bridge_chain_get_first_bridge(encoder);
+		drm_atomic_bridge_chain_disable(bridge, old_state);
 
 		/* Right function depends upon target state. */
 		if (funcs) {
@@ -1051,8 +1058,7 @@ disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state)
 				funcs->dpms(encoder, DRM_MODE_DPMS_OFF);
 		}
 
-		drm_atomic_bridge_chain_post_disable(encoder->bridge,
-						     old_state);
+		drm_atomic_bridge_chain_post_disable(bridge, old_state);
 	}
 
 	for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) {
@@ -1206,6 +1212,7 @@ crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state)
 		const struct drm_encoder_helper_funcs *funcs;
 		struct drm_encoder *encoder;
 		struct drm_display_mode *mode, *adjusted_mode;
+		struct drm_bridge *bridge;
 
 		if (!new_conn_state->best_encoder)
 			continue;
@@ -1233,8 +1240,8 @@ crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state)
 			funcs->mode_set(encoder, mode, adjusted_mode);
 		}
 
-		drm_bridge_chain_mode_set(encoder->bridge, mode,
-					  adjusted_mode);
+		bridge = drm_bridge_chain_get_first_bridge(encoder);
+		drm_bridge_chain_mode_set(bridge, mode, adjusted_mode);
 	}
 }
 
@@ -1333,6 +1340,7 @@ void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev,
 	for_each_new_connector_in_state(old_state, connector, new_conn_state, i) {
 		const struct drm_encoder_helper_funcs *funcs;
 		struct drm_encoder *encoder;
+		struct drm_bridge *bridge;
 
 		if (!new_conn_state->best_encoder)
 			continue;
@@ -1351,7 +1359,8 @@ void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev,
 		 * Each encoder has at most one connector (since we always steal
 		 * it away), so we won't call enable hooks twice.
 		 */
-		drm_atomic_bridge_chain_pre_enable(encoder->bridge, old_state);
+		bridge = drm_bridge_chain_get_first_bridge(encoder);
+		drm_atomic_bridge_chain_pre_enable(bridge, old_state);
 
 		if (funcs) {
 			if (funcs->atomic_enable)
@@ -1362,7 +1371,7 @@ void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev,
 				funcs->commit(encoder);
 		}
 
-		drm_atomic_bridge_chain_enable(encoder->bridge, old_state);
+		drm_atomic_bridge_chain_enable(bridge, old_state);
 	}
 
 	drm_atomic_helper_commit_writebacks(dev, old_state);
diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c
index 54c874493c57e837ff68009d6782f8b941c24a28..b6517b4fa3d1b384d7ec2c3205961dc91c7721b0 100644
--- a/drivers/gpu/drm/drm_bridge.c
+++ b/drivers/gpu/drm/drm_bridge.c
@@ -55,7 +55,7 @@
  * just provide additional hooks to get the desired output at the end of the
  * encoder chain.
  *
- * Bridges can also be chained up using the &drm_bridge.next pointer.
+ * Bridges can also be chained up using the &drm_bridge.chain_node field.
  *
  * Both legacy CRTC helpers and the new atomic modeset helpers support bridges.
  */
@@ -128,20 +128,21 @@ int drm_bridge_attach(struct drm_encoder *encoder, struct drm_bridge *bridge,
 	bridge->dev = encoder->dev;
 	bridge->encoder = encoder;
 
+	if (previous)
+		list_add(&bridge->chain_node, &previous->chain_node);
+	else
+		list_add(&bridge->chain_node, &encoder->bridge_chain);
+
 	if (bridge->funcs->attach) {
 		ret = bridge->funcs->attach(bridge);
 		if (ret < 0) {
+			list_del(&bridge->chain_node);
 			bridge->dev = NULL;
 			bridge->encoder = NULL;
 			return ret;
 		}
 	}
 
-	if (previous)
-		previous->next = bridge;
-	else
-		encoder->bridge = bridge;
-
 	return 0;
 }
 EXPORT_SYMBOL(drm_bridge_attach);
@@ -157,6 +158,7 @@ void drm_bridge_detach(struct drm_bridge *bridge)
 	if (bridge->funcs->detach)
 		bridge->funcs->detach(bridge);
 
+	list_del(&bridge->chain_node);
 	bridge->dev = NULL;
 }
 
@@ -190,18 +192,21 @@ bool drm_bridge_chain_mode_fixup(struct drm_bridge *bridge,
 				 const struct drm_display_mode *mode,
 				 struct drm_display_mode *adjusted_mode)
 {
-	bool ret = true;
+	struct drm_encoder *encoder;
 
 	if (!bridge)
 		return true;
 
-	if (bridge->funcs->mode_fixup)
-		ret = bridge->funcs->mode_fixup(bridge, mode, adjusted_mode);
+	encoder = bridge->encoder;
+	list_for_each_entry_from(bridge, &encoder->bridge_chain, chain_node) {
+		if (!bridge->funcs->mode_fixup)
+			continue;
 
-	ret = ret && drm_bridge_chain_mode_fixup(bridge->next, mode,
-						 adjusted_mode);
+		if (!bridge->funcs->mode_fixup(bridge, mode, adjusted_mode))
+			return false;
+	}
 
-	return ret;
+	return true;
 }
 EXPORT_SYMBOL(drm_bridge_chain_mode_fixup);
 
@@ -224,18 +229,24 @@ enum drm_mode_status
 drm_bridge_chain_mode_valid(struct drm_bridge *bridge,
 			    const struct drm_display_mode *mode)
 {
-	enum drm_mode_status ret = MODE_OK;
+	struct drm_encoder *encoder;
 
 	if (!bridge)
-		return ret;
+		return MODE_OK;
 
-	if (bridge->funcs->mode_valid)
-		ret = bridge->funcs->mode_valid(bridge, mode);
+	encoder = bridge->encoder;
+	list_for_each_entry_from(bridge, &encoder->bridge_chain, chain_node) {
+		enum drm_mode_status ret;
+
+		if (!bridge->funcs->mode_valid)
+			continue;
 
-	if (ret != MODE_OK)
-		return ret;
+		ret = bridge->funcs->mode_valid(bridge, mode);
+		if (ret != MODE_OK)
+			return ret;
+	}
 
-	return drm_bridge_chain_mode_valid(bridge->next, mode);
+	return MODE_OK;
 }
 EXPORT_SYMBOL(drm_bridge_chain_mode_valid);
 
@@ -251,13 +262,20 @@ EXPORT_SYMBOL(drm_bridge_chain_mode_valid);
  */
 void drm_bridge_chain_disable(struct drm_bridge *bridge)
 {
+	struct drm_encoder *encoder;
+	struct drm_bridge *iter;
+
 	if (!bridge)
 		return;
 
-	drm_bridge_chain_disable(bridge->next);
+	encoder = bridge->encoder;
+	list_for_each_entry_reverse(iter, &encoder->bridge_chain, chain_node) {
+		if (iter->funcs->disable)
+			iter->funcs->disable(iter);
 
-	if (bridge->funcs->disable)
-		bridge->funcs->disable(bridge);
+		if (iter == bridge)
+			break;
+	}
 }
 EXPORT_SYMBOL(drm_bridge_chain_disable);
 
@@ -274,13 +292,16 @@ EXPORT_SYMBOL(drm_bridge_chain_disable);
  */
 void drm_bridge_chain_post_disable(struct drm_bridge *bridge)
 {
+	struct drm_encoder *encoder;
+
 	if (!bridge)
 		return;
 
-	if (bridge->funcs->post_disable)
-		bridge->funcs->post_disable(bridge);
-
-	drm_bridge_chain_post_disable(bridge->next);
+	encoder = bridge->encoder;
+	list_for_each_entry_from(bridge, &encoder->bridge_chain, chain_node) {
+		if (bridge->funcs->post_disable)
+			bridge->funcs->post_disable(bridge);
+	}
 }
 EXPORT_SYMBOL(drm_bridge_chain_post_disable);
 
@@ -300,13 +321,16 @@ void drm_bridge_chain_mode_set(struct drm_bridge *bridge,
 			       const struct drm_display_mode *mode,
 			       const struct drm_display_mode *adjusted_mode)
 {
+	struct drm_encoder *encoder;
+
 	if (!bridge)
 		return;
 
-	if (bridge->funcs->mode_set)
-		bridge->funcs->mode_set(bridge, mode, adjusted_mode);
-
-	drm_bridge_chain_mode_set(bridge->next, mode, adjusted_mode);
+	encoder = bridge->encoder;
+	list_for_each_entry_from(bridge, &encoder->bridge_chain, chain_node) {
+		if (bridge->funcs->mode_set)
+			bridge->funcs->mode_set(bridge, mode, adjusted_mode);
+	}
 }
 EXPORT_SYMBOL(drm_bridge_chain_mode_set);
 
@@ -323,13 +347,17 @@ EXPORT_SYMBOL(drm_bridge_chain_mode_set);
  */
 void drm_bridge_chain_pre_enable(struct drm_bridge *bridge)
 {
+	struct drm_encoder *encoder;
+	struct drm_bridge *iter;
+
 	if (!bridge)
 		return;
 
-	drm_bridge_chain_pre_enable(bridge->next);
-
-	if (bridge->funcs->pre_enable)
-		bridge->funcs->pre_enable(bridge);
+	encoder = bridge->encoder;
+	list_for_each_entry_reverse(iter, &encoder->bridge_chain, chain_node) {
+		if (iter->funcs->pre_enable)
+			iter->funcs->pre_enable(iter);
+	}
 }
 EXPORT_SYMBOL(drm_bridge_chain_pre_enable);
 
@@ -345,13 +373,16 @@ EXPORT_SYMBOL(drm_bridge_chain_pre_enable);
  */
 void drm_bridge_chain_enable(struct drm_bridge *bridge)
 {
+	struct drm_encoder *encoder;
+
 	if (!bridge)
 		return;
 
-	if (bridge->funcs->enable)
-		bridge->funcs->enable(bridge);
-
-	drm_bridge_chain_enable(bridge->next);
+	encoder = bridge->encoder;
+	list_for_each_entry_from(bridge, &encoder->bridge_chain, chain_node) {
+		if (bridge->funcs->enable)
+			bridge->funcs->enable(bridge);
+	}
 }
 EXPORT_SYMBOL(drm_bridge_chain_enable);
 
@@ -370,15 +401,22 @@ EXPORT_SYMBOL(drm_bridge_chain_enable);
 void drm_atomic_bridge_chain_disable(struct drm_bridge *bridge,
 				     struct drm_atomic_state *state)
 {
+	struct drm_encoder *encoder;
+	struct drm_bridge *iter;
+
 	if (!bridge)
 		return;
 
-	drm_atomic_bridge_chain_disable(bridge->next, state);
+	encoder = bridge->encoder;
+	list_for_each_entry_reverse(iter, &encoder->bridge_chain, chain_node) {
+		if (iter->funcs->atomic_disable)
+			iter->funcs->atomic_disable(iter, state);
+		else if (iter->funcs->disable)
+			iter->funcs->disable(iter);
 
-	if (bridge->funcs->atomic_disable)
-		bridge->funcs->atomic_disable(bridge, state);
-	else if (bridge->funcs->disable)
-		bridge->funcs->disable(bridge);
+		if (iter == bridge)
+			break;
+	}
 }
 EXPORT_SYMBOL(drm_atomic_bridge_chain_disable);
 
@@ -398,15 +436,18 @@ EXPORT_SYMBOL(drm_atomic_bridge_chain_disable);
 void drm_atomic_bridge_chain_post_disable(struct drm_bridge *bridge,
 					  struct drm_atomic_state *state)
 {
+	struct drm_encoder *encoder;
+
 	if (!bridge)
 		return;
 
-	if (bridge->funcs->atomic_post_disable)
-		bridge->funcs->atomic_post_disable(bridge, state);
-	else if (bridge->funcs->post_disable)
-		bridge->funcs->post_disable(bridge);
-
-	drm_atomic_bridge_chain_post_disable(bridge->next, state);
+	encoder = bridge->encoder;
+	list_for_each_entry_from(bridge, &encoder->bridge_chain, chain_node) {
+		if (bridge->funcs->atomic_post_disable)
+			bridge->funcs->atomic_post_disable(bridge, state);
+		else if (bridge->funcs->post_disable)
+			bridge->funcs->post_disable(bridge);
+	}
 }
 EXPORT_SYMBOL(drm_atomic_bridge_chain_post_disable);
 
@@ -426,15 +467,22 @@ EXPORT_SYMBOL(drm_atomic_bridge_chain_post_disable);
 void drm_atomic_bridge_chain_pre_enable(struct drm_bridge *bridge,
 					struct drm_atomic_state *state)
 {
+	struct drm_encoder *encoder;
+	struct drm_bridge *iter;
+
 	if (!bridge)
 		return;
 
-	drm_atomic_bridge_chain_pre_enable(bridge->next, state);
+	encoder = bridge->encoder;
+	list_for_each_entry_reverse(iter, &encoder->bridge_chain, chain_node) {
+		if (iter->funcs->atomic_pre_enable)
+			iter->funcs->atomic_pre_enable(iter, state);
+		else if (iter->funcs->pre_enable)
+			iter->funcs->pre_enable(iter);
 
-	if (bridge->funcs->atomic_pre_enable)
-		bridge->funcs->atomic_pre_enable(bridge, state);
-	else if (bridge->funcs->pre_enable)
-		bridge->funcs->pre_enable(bridge);
+		if (iter == bridge)
+			break;
+	}
 }
 EXPORT_SYMBOL(drm_atomic_bridge_chain_pre_enable);
 
@@ -453,15 +501,18 @@ EXPORT_SYMBOL(drm_atomic_bridge_chain_pre_enable);
 void drm_atomic_bridge_chain_enable(struct drm_bridge *bridge,
 				    struct drm_atomic_state *state)
 {
+	struct drm_encoder *encoder;
+
 	if (!bridge)
 		return;
 
-	if (bridge->funcs->atomic_enable)
-		bridge->funcs->atomic_enable(bridge, state);
-	else if (bridge->funcs->enable)
-		bridge->funcs->enable(bridge);
-
-	drm_atomic_bridge_chain_enable(bridge->next, state);
+	encoder = bridge->encoder;
+	list_for_each_entry_from(bridge, &encoder->bridge_chain, chain_node) {
+		if (bridge->funcs->atomic_enable)
+			bridge->funcs->atomic_enable(bridge, state);
+		else if (bridge->funcs->enable)
+			bridge->funcs->enable(bridge);
+	}
 }
 EXPORT_SYMBOL(drm_atomic_bridge_chain_enable);
 
diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c
index 80ddf13ad99612056ca44bd49e2669d201920399..a51824a7e7c1e19f999ddc95547baefc573803a4 100644
--- a/drivers/gpu/drm/drm_crtc_helper.c
+++ b/drivers/gpu/drm/drm_crtc_helper.c
@@ -36,6 +36,7 @@
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_atomic_uapi.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_drv.h>
diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c
index ffc68d305afe434c01cdaad5cad87969ac49b07c..1322976c3c59761e47c80dc2b50d602b110ae881 100644
--- a/drivers/gpu/drm/drm_dp_helper.c
+++ b/drivers/gpu/drm/drm_dp_helper.c
@@ -438,6 +438,83 @@ int drm_dp_link_power_down(struct drm_dp_aux *aux, struct drm_dp_link *link)
 }
 EXPORT_SYMBOL(drm_dp_link_power_down);
 
+static int drm_dp_read_extended_dpcd_caps(struct drm_dp_aux *aux,
+					  u8 dpcd[DP_RECEIVER_CAP_SIZE])
+{
+	u8 dpcd_ext[6];
+	int ret;
+
+	/*
+	 * Prior to DP1.3 the bit represented by
+	 * DP_EXTENDED_RECEIVER_CAP_FIELD_PRESENT was reserved.
+	 * If it is set DP_DPCD_REV at 0000h could be at a value less than
+	 * the true capability of the panel. The only way to check is to
+	 * then compare 0000h and 2200h.
+	 */
+	if (!(dpcd[DP_TRAINING_AUX_RD_INTERVAL] &
+	      DP_EXTENDED_RECEIVER_CAP_FIELD_PRESENT))
+		return 0;
+
+	ret = drm_dp_dpcd_read(aux, DP_DP13_DPCD_REV, &dpcd_ext,
+			       sizeof(dpcd_ext));
+	if (ret < 0)
+		return ret;
+	if (ret != sizeof(dpcd_ext))
+		return -EIO;
+
+	if (dpcd[DP_DPCD_REV] > dpcd_ext[DP_DPCD_REV]) {
+		DRM_DEBUG_KMS("%s: Extended DPCD rev less than base DPCD rev (%d > %d)\n",
+			      aux->name, dpcd[DP_DPCD_REV],
+			      dpcd_ext[DP_DPCD_REV]);
+		return 0;
+	}
+
+	if (!memcmp(dpcd, dpcd_ext, sizeof(dpcd_ext)))
+		return 0;
+
+	DRM_DEBUG_KMS("%s: Base DPCD: %*ph\n",
+		      aux->name, DP_RECEIVER_CAP_SIZE, dpcd);
+
+	memcpy(dpcd, dpcd_ext, sizeof(dpcd_ext));
+
+	return 0;
+}
+
+/**
+ * drm_dp_read_dpcd_caps() - read DPCD caps and extended DPCD caps if
+ * available
+ * @aux: DisplayPort AUX channel
+ * @dpcd: Buffer to store the resulting DPCD in
+ *
+ * Attempts to read the base DPCD caps for @aux. Additionally, this function
+ * checks for and reads the extended DPRX caps (%DP_DP13_DPCD_REV) if
+ * present.
+ *
+ * Returns: %0 if the DPCD was read successfully, negative error code
+ * otherwise.
+ */
+int drm_dp_read_dpcd_caps(struct drm_dp_aux *aux,
+			  u8 dpcd[DP_RECEIVER_CAP_SIZE])
+{
+	int ret;
+
+	ret = drm_dp_dpcd_read(aux, DP_DPCD_REV, dpcd, DP_RECEIVER_CAP_SIZE);
+	if (ret < 0)
+		return ret;
+	if (ret != DP_RECEIVER_CAP_SIZE || dpcd[DP_DPCD_REV] == 0)
+		return -EIO;
+
+	ret = drm_dp_read_extended_dpcd_caps(aux, dpcd);
+	if (ret < 0)
+		return ret;
+
+	DRM_DEBUG_KMS("%s: DPCD: %*ph\n",
+		      aux->name, DP_RECEIVER_CAP_SIZE, dpcd);
+
+	return ret;
+}
+EXPORT_SYMBOL(drm_dp_read_dpcd_caps);
+
 /**
  * drm_dp_link_configure() - configure a DisplayPort link
  * @aux: DisplayPort AUX channel
diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index 769feefeeeefbed02d7a257c249ddc90b64b9644..d8f98c719f385e17d0a4e2a3d496de5ec57872a2 100644
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -39,6 +39,7 @@
 #include <drm/drm_color_mgmt.h>
 #include <drm/drm_drv.h>
 #include <drm/drm_file.h>
+#include <drm/drm_managed.h>
 #include <drm/drm_mode_object.h>
 #include <drm/drm_print.h>
 
@@ -109,13 +110,25 @@ static struct drm_minor **drm_minor_get_slot(struct drm_device *dev,
 	}
 }
 
+static void drm_minor_alloc_release(struct drm_device *dev, void *data)
+{
+	struct drm_minor *minor = data;
+	unsigned long flags;
+
+	put_device(minor->kdev);
+
+	spin_lock_irqsave(&drm_minor_lock, flags);
+	idr_remove(&drm_minors_idr, minor->index);
+	spin_unlock_irqrestore(&drm_minor_lock, flags);
+}
+
 static int drm_minor_alloc(struct drm_device *dev, unsigned int type)
 {
 	struct drm_minor *minor;
 	unsigned long flags;
 	int r;
 
-	minor = kzalloc(sizeof(*minor), GFP_KERNEL);
+	minor = drmm_kzalloc(dev, sizeof(*minor), GFP_KERNEL);
 	if (!minor)
 		return -ENOMEM;
 
@@ -133,46 +146,20 @@ static int drm_minor_alloc(struct drm_device *dev, unsigned int type)
 	idr_preload_end();
 
 	if (r < 0)
-		goto err_free;
+		return r;
 
 	minor->index = r;
 
+	r = drmm_add_action_or_reset(dev, drm_minor_alloc_release, minor);
+	if (r)
+		return r;
+
 	minor->kdev = drm_sysfs_minor_alloc(minor);
-	if (IS_ERR(minor->kdev)) {
-		r = PTR_ERR(minor->kdev);
-		goto err_index;
-	}
+	if (IS_ERR(minor->kdev))
+		return PTR_ERR(minor->kdev);
 
 	*drm_minor_get_slot(dev, type) = minor;
 	return 0;
-
-err_index:
-	spin_lock_irqsave(&drm_minor_lock, flags);
-	idr_remove(&drm_minors_idr, minor->index);
-	spin_unlock_irqrestore(&drm_minor_lock, flags);
-err_free:
-	kfree(minor);
-	return r;
-}
-
-static void drm_minor_free(struct drm_device *dev, unsigned int type)
-{
-	struct drm_minor **slot, *minor;
-	unsigned long flags;
-
-	slot = drm_minor_get_slot(dev, type);
-	minor = *slot;
-	if (!minor)
-		return;
-
-	put_device(minor->kdev);
-
-	spin_lock_irqsave(&drm_minor_lock, flags);
-	idr_remove(&drm_minors_idr, minor->index);
-	spin_unlock_irqrestore(&drm_minor_lock, flags);
-
-	kfree(minor);
-	*slot = NULL;
 }
 
 static int drm_minor_register(struct drm_device *dev, unsigned int type)
@@ -597,6 +584,23 @@ static void drm_fs_inode_free(struct inode *inode)
  *    used.
  */
 
+static void drm_dev_init_release(struct drm_device *dev, void *res)
+{
+	drm_legacy_ctxbitmap_cleanup(dev);
+	drm_legacy_remove_map_hash(dev);
+	drm_fs_inode_free(dev->anon_inode);
+
+	put_device(dev->dev);
+	/* Prevent use-after-free in drm_managed_release when debugging is
+	 * enabled. Slightly awkward, but can't really be helped. */
+	dev->dev = NULL;
+	mutex_destroy(&dev->master_mutex);
+	mutex_destroy(&dev->clientlist_mutex);
+	mutex_destroy(&dev->filelist_mutex);
+	mutex_destroy(&dev->struct_mutex);
+	drm_legacy_destroy_members(dev);
+}
+
 /**
  * drm_dev_init - Initialise new DRM device
  * @dev: DRM device
@@ -645,6 +649,9 @@ int drm_dev_init(struct drm_device *dev,
 	dev->dev = get_device(parent);
 	dev->driver = driver;
 
+	INIT_LIST_HEAD(&dev->managed.resources);
+	spin_lock_init(&dev->managed.lock);
+
 	/* no per-device feature limits by default */
 	dev->driver_features = ~0u;
 
@@ -660,26 +667,30 @@ int drm_dev_init(struct drm_device *dev,
 	mutex_init(&dev->clientlist_mutex);
 	mutex_init(&dev->master_mutex);
 
+	ret = drmm_add_action(dev, drm_dev_init_release, NULL);
+	if (ret)
+		return ret;
+
 	dev->anon_inode = drm_fs_inode_new();
 	if (IS_ERR(dev->anon_inode)) {
 		ret = PTR_ERR(dev->anon_inode);
 		DRM_ERROR("Cannot allocate anonymous inode: %d\n", ret);
-		goto err_free;
+		goto err;
 	}
 
 	if (drm_core_check_feature(dev, DRIVER_RENDER)) {
 		ret = drm_minor_alloc(dev, DRM_MINOR_RENDER);
 		if (ret)
-			goto err_minors;
+			goto err;
 	}
 
 	ret = drm_minor_alloc(dev, DRM_MINOR_PRIMARY);
 	if (ret)
-		goto err_minors;
+		goto err;
 
 	ret = drm_legacy_create_map_hash(dev);
 	if (ret)
-		goto err_minors;
+		goto err;
 
 	drm_legacy_ctxbitmap_init(dev);
 
@@ -687,7 +698,7 @@ int drm_dev_init(struct drm_device *dev,
 		ret = drm_gem_init(dev);
 		if (ret) {
 			DRM_ERROR("Cannot initialize graphics execution manager (GEM)\n");
-			goto err_ctxbitmap;
+			goto err;
 		}
 	}
 
@@ -700,20 +711,9 @@ int drm_dev_init(struct drm_device *dev,
 err_setunique:
 	if (drm_core_check_feature(dev, DRIVER_GEM))
 		drm_gem_destroy(dev);
-err_ctxbitmap:
-	drm_legacy_ctxbitmap_cleanup(dev);
-	drm_legacy_remove_map_hash(dev);
-err_minors:
-	drm_minor_free(dev, DRM_MINOR_PRIMARY);
-	drm_minor_free(dev, DRM_MINOR_RENDER);
-	drm_fs_inode_free(dev->anon_inode);
-err_free:
-	put_device(dev->dev);
-	mutex_destroy(&dev->master_mutex);
-	mutex_destroy(&dev->clientlist_mutex);
-	mutex_destroy(&dev->filelist_mutex);
-	mutex_destroy(&dev->struct_mutex);
-	drm_legacy_destroy_members(dev);
+err:
+	drm_managed_release(dev);
+
 	return ret;
 }
 EXPORT_SYMBOL(drm_dev_init);
@@ -775,22 +775,6 @@ void drm_dev_fini(struct drm_device *dev)
 
 	if (drm_core_check_feature(dev, DRIVER_GEM))
 		drm_gem_destroy(dev);
-
-	drm_legacy_ctxbitmap_cleanup(dev);
-	drm_legacy_remove_map_hash(dev);
-	drm_fs_inode_free(dev->anon_inode);
-
-	drm_minor_free(dev, DRM_MINOR_PRIMARY);
-	drm_minor_free(dev, DRM_MINOR_RENDER);
-
-	put_device(dev->dev);
-
-	mutex_destroy(&dev->master_mutex);
-	mutex_destroy(&dev->clientlist_mutex);
-	mutex_destroy(&dev->filelist_mutex);
-	mutex_destroy(&dev->struct_mutex);
-	drm_legacy_destroy_members(dev);
-	kfree(dev->unique);
 }
 EXPORT_SYMBOL(drm_dev_fini);
 
@@ -840,12 +824,18 @@ static void drm_dev_release(struct kref *ref)
 {
 	struct drm_device *dev = container_of(ref, struct drm_device, ref);
 
-	if (dev->driver->release) {
+	if (dev->driver->release)
 		dev->driver->release(dev);
-	} else {
+	else
 		drm_dev_fini(dev);
+
+	drm_managed_release(dev);
+
+	if (!dev->driver->release && !dev->managed.final_kfree) {
+		WARN_ON(!list_empty(&dev->managed.resources));
 		kfree(dev);
-	}
+	} else if (dev->managed.final_kfree)
+		kfree(dev->managed.final_kfree);
 }
 
 /**
diff --git a/drivers/gpu/drm/drm_encoder.c b/drivers/gpu/drm/drm_encoder.c
index 80ce9e1040de11980c21fc27565ca38c36856243..1143bc7f325227ee252f6d593ffea55d0daa9761 100644
--- a/drivers/gpu/drm/drm_encoder.c
+++ b/drivers/gpu/drm/drm_encoder.c
@@ -22,9 +22,12 @@
 
 #include <linux/export.h>
 
+#include <drm/drm_bridge.h>
 #include <drm/drm_device.h>
 #include <drm/drm_drv.h>
 #include <drm/drm_encoder.h>
+#include <drm/drm_managed.h>
+#include <drm/drm_print.h>
 
 #include "drm_crtc_internal.h"
 
@@ -71,7 +74,7 @@ int drm_encoder_register_all(struct drm_device *dev)
 	int ret = 0;
 
 	drm_for_each_encoder(encoder, dev) {
-		if (encoder->funcs->late_register)
+		if (encoder->funcs && encoder->funcs->late_register)
 			ret = encoder->funcs->late_register(encoder);
 		if (ret)
 			return ret;
@@ -85,30 +88,16 @@ void drm_encoder_unregister_all(struct drm_device *dev)
 	struct drm_encoder *encoder;
 
 	drm_for_each_encoder(encoder, dev) {
-		if (encoder->funcs->early_unregister)
+		if (encoder->funcs && encoder->funcs->early_unregister)
 			encoder->funcs->early_unregister(encoder);
 	}
 }
 
-/**
- * drm_encoder_init - Init a preallocated encoder
- * @dev: drm device
- * @encoder: the encoder to init
- * @funcs: callbacks for this encoder
- * @encoder_type: user visible type of the encoder
- * @name: printf style format string for the encoder name, or NULL for default name
- *
- * Initialises a preallocated encoder. Encoder should be subclassed as part of
- * driver encoder objects. At driver unload time drm_encoder_cleanup() should be
- * called from the driver's &drm_encoder_funcs.destroy hook.
- *
- * Returns:
- * Zero on success, error code on failure.
- */
-int drm_encoder_init(struct drm_device *dev,
-		     struct drm_encoder *encoder,
-		     const struct drm_encoder_funcs *funcs,
-		     int encoder_type, const char *name, ...)
+__printf(5, 0)
+static int __drm_encoder_init(struct drm_device *dev,
+			      struct drm_encoder *encoder,
+			      const struct drm_encoder_funcs *funcs,
+			      int encoder_type, const char *name, va_list ap)
 {
 	int ret;
 
@@ -124,11 +113,7 @@ int drm_encoder_init(struct drm_device *dev,
 	encoder->encoder_type = encoder_type;
 	encoder->funcs = funcs;
 	if (name) {
-		va_list ap;
-
-		va_start(ap, name);
 		encoder->name = kvasprintf(GFP_KERNEL, name, ap);
-		va_end(ap);
 	} else {
 		encoder->name = kasprintf(GFP_KERNEL, "%s-%d",
 					  drm_encoder_enum_list[encoder_type].name,
@@ -139,6 +124,7 @@ int drm_encoder_init(struct drm_device *dev,
 		goto out_put;
 	}
 
+	INIT_LIST_HEAD(&encoder->bridge_chain);
 	list_add_tail(&encoder->head, &dev->mode_config.encoder_list);
 	encoder->index = dev->mode_config.num_encoder++;
 
@@ -148,6 +134,44 @@ int drm_encoder_init(struct drm_device *dev,
 
 	return ret;
 }
+
+/**
+ * drm_encoder_init - Init a preallocated encoder
+ * @dev: drm device
+ * @encoder: the encoder to init
+ * @funcs: callbacks for this encoder
+ * @encoder_type: user visible type of the encoder
+ * @name: printf style format string for the encoder name, or NULL for default name
+ *
+ * Initializes a preallocated encoder. Encoder should be subclassed as part of
+ * driver encoder objects. At driver unload time the driver's
+ * &drm_encoder_funcs.destroy hook should call drm_encoder_cleanup() and kfree()
+ * the encoder structure. The encoder structure should not be allocated with
+ * devm_kzalloc().
+ *
+ * Note: consider using drmm_encoder_alloc() or drmm_encoder_init()
+ * instead of drm_encoder_init() to let the DRM managed resource
+ * infrastructure take care of cleanup and deallocation.
+ *
+ * Returns:
+ * Zero on success, error code on failure.
+ */
+int drm_encoder_init(struct drm_device *dev,
+		     struct drm_encoder *encoder,
+		     const struct drm_encoder_funcs *funcs,
+		     int encoder_type, const char *name, ...)
+{
+	va_list ap;
+	int ret;
+
+	WARN_ON(!funcs->destroy);
+
+	va_start(ap, name);
+	ret = __drm_encoder_init(dev, encoder, funcs, encoder_type, name, ap);
+	va_end(ap);
+
+	return ret;
+}
 EXPORT_SYMBOL(drm_encoder_init);
 
 /**
@@ -159,22 +183,16 @@ EXPORT_SYMBOL(drm_encoder_init);
 void drm_encoder_cleanup(struct drm_encoder *encoder)
 {
 	struct drm_device *dev = encoder->dev;
+	struct drm_bridge *bridge, *next;
 
 	/* Note that the encoder_list is considered to be static; should we
 	 * remove the drm_encoder at runtime we would have to decrement all
 	 * the indices on the drm_encoder after us in the encoder_list.
 	 */
 
-	if (encoder->bridge) {
-		struct drm_bridge *bridge = encoder->bridge;
-		struct drm_bridge *next;
-
-		while (bridge) {
-			next = drm_bridge_get_next_bridge(bridge);
-			drm_bridge_detach(bridge);
-			bridge = next;
-		}
-	}
+	list_for_each_entry_safe(bridge, next, &encoder->bridge_chain,
+				 chain_node)
+		drm_bridge_detach(bridge);
 
 	drm_mode_object_unregister(dev, &encoder->base);
 	kfree(encoder->name);
@@ -185,6 +203,100 @@ void drm_encoder_cleanup(struct drm_encoder *encoder)
 }
 EXPORT_SYMBOL(drm_encoder_cleanup);
 
+static void drmm_encoder_alloc_release(struct drm_device *dev, void *ptr)
+{
+	struct drm_encoder *encoder = ptr;
+
+	if (WARN_ON(!encoder->dev))
+		return;
+
+	drm_encoder_cleanup(encoder);
+}
+
+__printf(5, 0)
+static int __drmm_encoder_init(struct drm_device *dev,
+			       struct drm_encoder *encoder,
+			       const struct drm_encoder_funcs *funcs,
+			       int encoder_type,
+			       const char *name,
+			       va_list args)
+{
+	int ret;
+
+	if (drm_WARN_ON(dev, funcs && funcs->destroy))
+		return -EINVAL;
+
+	ret = __drm_encoder_init(dev, encoder, funcs, encoder_type, name, args);
+	if (ret)
+		return ret;
+
+	ret = drmm_add_action_or_reset(dev, drmm_encoder_alloc_release, encoder);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+void *__drmm_encoder_alloc(struct drm_device *dev, size_t size, size_t offset,
+			   const struct drm_encoder_funcs *funcs,
+			   int encoder_type, const char *name, ...)
+{
+	void *container;
+	struct drm_encoder *encoder;
+	va_list ap;
+	int ret;
+
+	container = drmm_kzalloc(dev, size, GFP_KERNEL);
+	if (!container)
+		return ERR_PTR(-ENOMEM);
+
+	encoder = container + offset;
+
+	va_start(ap, name);
+	ret = __drmm_encoder_init(dev, encoder, funcs, encoder_type, name, ap);
+	va_end(ap);
+	if (ret)
+		return ERR_PTR(ret);
+
+	return container;
+}
+EXPORT_SYMBOL(__drmm_encoder_alloc);
+
+/**
+ * drmm_encoder_init - Initialize a preallocated encoder
+ * @dev: drm device
+ * @encoder: the encoder to init
+ * @funcs: callbacks for this encoder (optional)
+ * @encoder_type: user visible type of the encoder
+ * @name: printf style format string for the encoder name, or NULL for default name
+ *
+ * Initializes a preallocated encoder. Encoder should be subclassed as
+ * part of driver encoder objects. Cleanup is automatically handled
+ * through registering drm_encoder_cleanup() with drmm_add_action(). The
+ * encoder structure should be allocated with drmm_kzalloc().
+ *
+ * The @drm_encoder_funcs.destroy hook must be NULL.
+ *
+ * Returns:
+ * Zero on success, error code on failure.
+ */
+int drmm_encoder_init(struct drm_device *dev, struct drm_encoder *encoder,
+		      const struct drm_encoder_funcs *funcs,
+		      int encoder_type, const char *name, ...)
+{
+	va_list ap;
+	int ret;
+
+	va_start(ap, name);
+	ret = __drmm_encoder_init(dev, encoder, funcs, encoder_type, name, ap);
+	va_end(ap);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+EXPORT_SYMBOL(drmm_encoder_init);
+
 static struct drm_crtc *drm_encoder_get_crtc(struct drm_encoder *encoder)
 {
 	struct drm_connector *connector;
diff --git a/drivers/gpu/drm/drm_internal.h b/drivers/gpu/drm/drm_internal.h
index 41a9a9bae5848b80f913a3dadd72713e25fe31cd..5db40ecbe89e6d0809f8d108504a3555b64268f2 100644
--- a/drivers/gpu/drm/drm_internal.h
+++ b/drivers/gpu/drm/drm_internal.h
@@ -66,6 +66,9 @@ void drm_prime_remove_buf_handle(struct drm_prime_file_private *prime_fpriv,
 struct drm_minor *drm_minor_acquire(unsigned int minor_id);
 void drm_minor_release(struct drm_minor *minor);
 
+/* drm_managed.c */
+void drm_managed_release(struct drm_device *dev);
+
 /* drm_vblank.c */
 void drm_vblank_disable_and_save(struct drm_device *dev, unsigned int pipe);
 void drm_vblank_cleanup(struct drm_device *dev);
diff --git a/drivers/gpu/drm/drm_managed.c b/drivers/gpu/drm/drm_managed.c
new file mode 100644
index 0000000000000000000000000000000000000000..afd1b0e741e40f84b80cc0b4c1bef67a1809e582
--- /dev/null
+++ b/drivers/gpu/drm/drm_managed.c
@@ -0,0 +1,207 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020 Intel
+ *
+ * Based on drivers/base/devres.c
+ */
+
+#include <drm/drm_managed.h>
+
+#include <linux/list.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+
+#include <drm/drm_device.h>
+#include <drm/drm_print.h>
+
+/**
+ * DOC: managed resources
+ *
+ * Inspired by struct &device managed resources, but tied to the lifetime of
+ * struct &drm_device, which can outlive the underlying physical device, usually
+ * when userspace has some open files and other handles to resources still open.
+ */
+struct drmres_node {
+	struct list_head	entry;
+	drmres_release_t	release;
+	const char		*name;
+	size_t			size;
+};
+
+struct drmres {
+	struct drmres_node		node;
+	/*
+	 * Some archs want to perform DMA into kmalloc caches
+	 * and need a guaranteed alignment larger than
+	 * the alignment of a 64-bit integer.
+	 * Thus we use ARCH_KMALLOC_MINALIGN here and get exactly the same
+	 * buffer alignment as if it was allocated by plain kmalloc().
+	 */
+	u8 __aligned(ARCH_KMALLOC_MINALIGN) data[];
+};
+
+static void free_dr(struct drmres *dr)
+{
+	kfree_const(dr->node.name);
+	kfree(dr);
+}
+
+void drm_managed_release(struct drm_device *dev)
+{
+	struct drmres *dr, *tmp;
+
+	drm_dbg_drmres(dev, "drmres release begin\n");
+	list_for_each_entry_safe(dr, tmp, &dev->managed.resources, node.entry) {
+		drm_dbg_drmres(dev, "REL %p %s (%zu bytes)\n",
+			       dr, dr->node.name, dr->node.size);
+
+		if (dr->node.release)
+			dr->node.release(dev, dr->node.size ? *(void **)&dr->data : NULL);
+
+		list_del(&dr->node.entry);
+		free_dr(dr);
+	}
+	drm_dbg_drmres(dev, "drmres release end\n");
+}
+
+/*
+ * Always inline so that kmalloc_track_caller tracks the actual interesting
+ * caller outside of drm_managed.c.
+ */
+static __always_inline struct drmres * alloc_dr(drmres_release_t release,
+						size_t size, gfp_t gfp, int nid)
+{
+	size_t tot_size;
+	struct drmres *dr;
+
+	/* We must catch any near-SIZE_MAX cases that could overflow. */
+	if (unlikely(check_add_overflow(sizeof(*dr), size, &tot_size)))
+		return NULL;
+
+	dr = kmalloc_node_track_caller(tot_size, gfp, nid);
+	if (unlikely(!dr))
+		return NULL;
+
+	memset(dr, 0, offsetof(struct drmres, data));
+
+	INIT_LIST_HEAD(&dr->node.entry);
+	dr->node.release = release;
+	dr->node.size = size;
+
+	return dr;
+}
+
+static void del_dr(struct drm_device *dev, struct drmres *dr)
+{
+	list_del_init(&dr->node.entry);
+
+	drm_dbg_drmres(dev, "DEL %p %s (%lu bytes)\n",
+		       dr, dr->node.name, (unsigned long) dr->node.size);
+}
+
+static void add_dr(struct drm_device *dev, struct drmres *dr)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&dev->managed.lock, flags);
+	list_add(&dr->node.entry, &dev->managed.resources);
+	spin_unlock_irqrestore(&dev->managed.lock, flags);
+
+	drm_dbg_drmres(dev, "ADD %p %s (%lu bytes)\n",
+		       dr, dr->node.name, (unsigned long) dr->node.size);
+}
+
+void drmm_add_final_kfree(struct drm_device *dev, void *container)
+{
+	WARN_ON(dev->managed.final_kfree);
+	WARN_ON(dev < (struct drm_device *) container);
+	WARN_ON(dev + 1 >=
+		(struct drm_device *) (container + ksize(container)));
+	dev->managed.final_kfree = container;
+}
+EXPORT_SYMBOL(drmm_add_final_kfree);
+
+int __drmm_add_action(struct drm_device *dev,
+		      drmres_release_t action,
+		      void *data, const char *name)
+{
+	struct drmres *dr;
+	void **void_ptr;
+
+	dr = alloc_dr(action, data ? sizeof(void*) : 0,
+		      GFP_KERNEL | __GFP_ZERO,
+		      dev_to_node(dev->dev));
+	if (!dr) {
+		drm_dbg_drmres(dev, "failed to add action %s for %p\n",
+			       name, data);
+		return -ENOMEM;
+	}
+
+	dr->node.name = kstrdup_const(name, GFP_KERNEL);
+	if (data) {
+		void_ptr = (void **)&dr->data;
+		*void_ptr = data;
+	}
+
+	add_dr(dev, dr);
+
+	return 0;
+}
+EXPORT_SYMBOL(__drmm_add_action);
+
+int __drmm_add_action_or_reset(struct drm_device *dev,
+			       drmres_release_t action,
+			       void *data, const char *name)
+{
+	int ret;
+
+	ret = __drmm_add_action(dev, action, data, name);
+	if (ret)
+		action(dev, data);
+
+	return ret;
+}
+EXPORT_SYMBOL(__drmm_add_action_or_reset);
+
+void *drmm_kmalloc(struct drm_device *dev, size_t size, gfp_t gfp)
+{
+	struct drmres *dr;
+
+	dr = alloc_dr(NULL, size, gfp, dev_to_node(dev->dev));
+	if (!dr) {
+		drm_dbg_drmres(dev, "failed to allocate %zu bytes, %u flags\n",
+			       size, gfp);
+		return NULL;
+	}
+	dr->node.name = kstrdup_const("kmalloc", GFP_KERNEL);
+
+	add_dr(dev, dr);
+
+	return dr->data;
+}
+EXPORT_SYMBOL(drmm_kmalloc);
+
+void drmm_kfree(struct drm_device *dev, void *data)
+{
+	struct drmres *dr_match = NULL, *dr;
+	unsigned long flags;
+
+	if (!data)
+		return;
+
+	spin_lock_irqsave(&dev->managed.lock, flags);
+	list_for_each_entry(dr, &dev->managed.resources, node.entry) {
+		if (dr->data == data) {
+			dr_match = dr;
+			del_dr(dev, dr_match);
+			break;
+		}
+	}
+	spin_unlock_irqrestore(&dev->managed.lock, flags);
+
+	if (WARN_ON(!dr_match))
+		return;
+
+	free_dr(dr_match);
+}
+EXPORT_SYMBOL(drmm_kfree);
diff --git a/drivers/gpu/drm/drm_mode_config.c b/drivers/gpu/drm/drm_mode_config.c
index 7bc03c3c154ffc56ecadb023255cfa0310440669..5b7b497a0213d8604658f1ba5be2d3da0829564d 100644
--- a/drivers/gpu/drm/drm_mode_config.c
+++ b/drivers/gpu/drm/drm_mode_config.c
@@ -193,7 +193,7 @@ void drm_mode_config_reset(struct drm_device *dev)
 			crtc->funcs->reset(crtc);
 
 	drm_for_each_encoder(encoder, dev)
-		if (encoder->funcs->reset)
+		if (encoder->funcs && encoder->funcs->reset)
 			encoder->funcs->reset(encoder);
 
 	drm_connector_list_iter_begin(dev, &conn_iter);
diff --git a/drivers/gpu/drm/drm_probe_helper.c b/drivers/gpu/drm/drm_probe_helper.c
index d45f43feaf8620a93c986b3e48f39e82c20f3dbc..dc30226f56478425c1a08920ee855c41720a634e 100644
--- a/drivers/gpu/drm/drm_probe_helper.c
+++ b/drivers/gpu/drm/drm_probe_helper.c
@@ -32,6 +32,7 @@
 #include <linux/export.h>
 #include <linux/moduleparam.h>
 
+#include <drm/drm_bridge.h>
 #include <drm/drm_client.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_edid.h>
@@ -101,6 +102,7 @@ drm_mode_validate_pipeline(struct drm_display_mode *mode,
 
 	/* Step 2: Validate against encoders and crtcs */
 	drm_connector_for_each_possible_encoder(connector, encoder, i) {
+		struct drm_bridge *bridge;
 		struct drm_crtc *crtc;
 
 		ret = drm_encoder_mode_valid(encoder, mode);
@@ -112,7 +114,8 @@ drm_mode_validate_pipeline(struct drm_display_mode *mode,
 			continue;
 		}
 
-		ret = drm_bridge_chain_mode_valid(encoder->bridge, mode);
+		bridge = drm_bridge_chain_get_first_bridge(encoder);
+		ret = drm_bridge_chain_mode_valid(bridge, mode);
 		if (ret != MODE_OK) {
 			/* There is also no point in continuing for crtc check
 			 * here. */
diff --git a/drivers/gpu/drm/drm_simple_kms_helper.c b/drivers/gpu/drm/drm_simple_kms_helper.c
index b11910f14c46b9eca4bbd0495fc785884494230e..046055719245a2861583f061b8ac0752ecc902ff 100644
--- a/drivers/gpu/drm/drm_simple_kms_helper.c
+++ b/drivers/gpu/drm/drm_simple_kms_helper.c
@@ -8,6 +8,7 @@
 
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_plane_helper.h>
 #include <drm/drm_probe_helper.h>
 #include <drm/drm_simple_kms_helper.h>
diff --git a/drivers/gpu/drm/exynos/exynos_dp.c b/drivers/gpu/drm/exynos/exynos_dp.c
index 01c5fbf9083a0c58b4cea97bb3a364924401fa86..065a1cb2a544484d4c3491cfe8074dbac6e456b4 100644
--- a/drivers/gpu/drm/exynos/exynos_dp.c
+++ b/drivers/gpu/drm/exynos/exynos_dp.c
@@ -19,6 +19,7 @@
 
 #include <drm/bridge/analogix_dp.h>
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_of.h>
 #include <drm/drm_panel.h>
diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
index babf3db82ce33a1377afc12b7ada5eeefee4281f..cc58a6aa23e2301dae5590c35d34e58aacdb5d30 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
@@ -24,6 +24,7 @@
 #include <video/videomode.h>
 
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_fb_helper.h>
 #include <drm/drm_mipi_dsi.h>
 #include <drm/drm_panel.h>
@@ -254,6 +255,7 @@ struct exynos_dsi {
 	struct mipi_dsi_host dsi_host;
 	struct drm_connector connector;
 	struct drm_panel *panel;
+	struct list_head bridge_chain;
 	struct drm_bridge *out_bridge;
 	struct device *dev;
 
@@ -1521,7 +1523,7 @@ static int exynos_dsi_host_attach(struct mipi_dsi_host *host,
 	if (out_bridge) {
 		drm_bridge_attach(encoder, out_bridge, NULL);
 		dsi->out_bridge = out_bridge;
-		encoder->bridge = NULL;
+		list_splice(&encoder->bridge_chain, &dsi->bridge_chain);
 	} else {
 		int ret = exynos_dsi_create_connector(encoder);
 
@@ -1587,6 +1589,7 @@ static int exynos_dsi_host_detach(struct mipi_dsi_host *host,
 		if (dsi->out_bridge->funcs->detach)
 			dsi->out_bridge->funcs->detach(dsi->out_bridge);
 		dsi->out_bridge = NULL;
+		INIT_LIST_HEAD(&dsi->bridge_chain);
 	}
 
 	if (drm->mode_config.poll_enabled)
@@ -1734,6 +1737,7 @@ static int exynos_dsi_probe(struct platform_device *pdev)
 	init_completion(&dsi->completed);
 	spin_lock_init(&dsi->transfer_lock);
 	INIT_LIST_HEAD(&dsi->transfer_list);
+	INIT_LIST_HEAD(&dsi->bridge_chain);
 
 	dsi->dsi_host.ops = &exynos_dsi_ops;
 	dsi->dsi_host.dev = dev;
diff --git a/drivers/gpu/drm/exynos/exynos_drm_mic.c b/drivers/gpu/drm/exynos/exynos_drm_mic.c
index 2aff986add899e8683c317f42f7d26a6b24d887f..004110c5ded42a22f6056f5b5e9d2e9ecd8fcadf 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_mic.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_mic.c
@@ -21,6 +21,7 @@
 #include <video/of_videomode.h>
 #include <video/videomode.h>
 
+#include <drm/drm_bridge.h>
 #include <drm/drm_encoder.h>
 #include <drm/drm_print.h>
 
diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c
index 0073a2b3b80a21e6cff52d064f303f3dbe6e1e2f..d85e15e816e994af03d8309c64db568653651b78 100644
--- a/drivers/gpu/drm/exynos/exynos_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
@@ -34,6 +34,7 @@
 #include <media/cec-notifier.h>
 
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_edid.h>
 #include <drm/drm_print.h>
 #include <drm/drm_probe_helper.h>
diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c
index 8de9bc8343a2b4ee0096d7e95f35aa32584d7fbc..69e1aeb1c65ea77c6c28c6a68c6272b11fc34934 100644
--- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c
@@ -9,6 +9,7 @@
 #include <linux/of_graph.h>
 
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_of.h>
 #include <drm/drm_panel.h>
 #include <drm/drm_probe_helper.h>
diff --git a/drivers/gpu/drm/hisilicon/hibmc/Makefile b/drivers/gpu/drm/hisilicon/hibmc/Makefile
index 87f990f1d32ee2101d4c59ac612262264bc6d63d..d392d2b89be73bfea3bf25f312618c9160689e66 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/Makefile
+++ b/drivers/gpu/drm/hisilicon/hibmc/Makefile
@@ -1,4 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0-only
-hibmc-drm-y := hibmc_drm_drv.o hibmc_drm_de.o hibmc_drm_vdac.o hibmc_drm_fbdev.o hibmc_ttm.o hibmc_drm_i2c.o
+hibmc-drm-y := hibmc_drm_drv.o hibmc_drm_de.o hibmc_drm_vdac.o hibmc_drm_fbdev.o hibmc_ttm.o hibmc_drm_i2c.o \
+	       dp/dp_aux.o dp/dp_link.o dp/dp_hw.o hibmc_drm_dp.o
 
 obj-$(CONFIG_DRM_HISI_HIBMC) += hibmc-drm.o
diff --git a/drivers/gpu/drm/hisilicon/hibmc/dp/dp_aux.c b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_aux.c
new file mode 100644
index 0000000000000000000000000000000000000000..b6ccc5261d8b00e3c9a155b7e871fc09d583444a
--- /dev/null
+++ b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_aux.c
@@ -0,0 +1,164 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+// Copyright (c) 2024 Hisilicon Limited.
+
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/kernel.h>
+#include <drm/drm_device.h>
+#include <drm/drm_print.h>
+#include "dp_comm.h"
+#include "dp_reg.h"
+
+#define HIBMC_AUX_CMD_REQ_LEN		GENMASK(7, 4)
+#define HIBMC_AUX_CMD_ADDR		GENMASK(27, 8)
+#define HIBMC_AUX_CMD_I2C_ADDR_ONLY	BIT(28)
+#define HIBMC_BYTES_IN_U32		4
+#define HIBMC_AUX_I2C_WRITE_SUCCESS	0x1
+#define HIBMC_DP_MIN_PULSE_NUM		0x9
+#define BITS_IN_U8			8
+
+static inline void hibmc_dp_aux_reset(struct hibmc_dp_dev *dp)
+{
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_DPTX_RST_CTRL, HIBMC_DP_CFG_AUX_RST_N, 0x0);
+	usleep_range(10, 15);
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_DPTX_RST_CTRL, HIBMC_DP_CFG_AUX_RST_N, 0x1);
+}
+
+static void hibmc_dp_aux_read_data(struct hibmc_dp_dev *dp, u8 *buf, u8 size)
+{
+	u32 reg_num;
+	u32 value;
+	u32 num;
+	u8 i, j;
+
+	reg_num = DIV_ROUND_UP(size, HIBMC_BYTES_IN_U32);
+	for (i = 0; i < reg_num; i++) {
+		/* number of bytes read from a single register */
+		num = min(size - i * HIBMC_BYTES_IN_U32, HIBMC_BYTES_IN_U32);
+		value = readl(dp->base + HIBMC_DP_AUX_RD_DATA0 + i * HIBMC_BYTES_IN_U32);
+		/* convert the 32-bit value of the register to the buffer. */
+		for (j = 0; j < num; j++)
+			buf[i * HIBMC_BYTES_IN_U32 + j] = value >> (j * BITS_IN_U8);
+	}
+}
+
+static void hibmc_dp_aux_write_data(struct hibmc_dp_dev *dp, u8 *buf, u8 size)
+{
+	u32 reg_num;
+	u32 value;
+	u32 num;
+	u8 i, j;
+
+	reg_num = DIV_ROUND_UP(size, HIBMC_BYTES_IN_U32);
+	for (i = 0; i < reg_num; i++) {
+		/* number of bytes written to a single register */
+		num = min_t(u8, size - i * HIBMC_BYTES_IN_U32, HIBMC_BYTES_IN_U32);
+		value = 0;
+		/* obtain the 32-bit value written to a single register. */
+		for (j = 0; j < num; j++)
+			value |= buf[i * HIBMC_BYTES_IN_U32 + j] << (j * BITS_IN_U8);
+		/* writing data to a single register */
+		writel(value, dp->base + HIBMC_DP_AUX_WR_DATA0 + i * HIBMC_BYTES_IN_U32);
+	}
+}
+
+static u32 hibmc_dp_aux_build_cmd(const struct drm_dp_aux_msg *msg)
+{
+	u32 aux_cmd = msg->request;
+
+	if (msg->size)
+		aux_cmd |= FIELD_PREP(HIBMC_AUX_CMD_REQ_LEN, (msg->size - 1));
+	else
+		aux_cmd |= FIELD_PREP(HIBMC_AUX_CMD_I2C_ADDR_ONLY, 1);
+
+	aux_cmd |= FIELD_PREP(HIBMC_AUX_CMD_ADDR, msg->address);
+
+	return aux_cmd;
+}
+
+/* ret >= 0, ret is size; ret < 0, ret is err code */
+static int hibmc_dp_aux_parse_xfer(struct hibmc_dp_dev *dp, struct drm_dp_aux_msg *msg)
+{
+	u32 buf_data_cnt;
+	u32 aux_status;
+
+	aux_status = readl(dp->base + HIBMC_DP_AUX_STATUS);
+	msg->reply = FIELD_GET(HIBMC_DP_CFG_AUX_STATUS, aux_status);
+
+	if (aux_status & HIBMC_DP_CFG_AUX_TIMEOUT)
+		return -ETIMEDOUT;
+
+	/* only address */
+	if (!msg->size)
+		return 0;
+
+	if (msg->reply != DP_AUX_NATIVE_REPLY_ACK)
+		return -EIO;
+
+	buf_data_cnt = FIELD_GET(HIBMC_DP_CFG_AUX_READY_DATA_BYTE, aux_status);
+
+	switch (msg->request) {
+	case DP_AUX_NATIVE_WRITE:
+		return msg->size;
+	case DP_AUX_I2C_WRITE | DP_AUX_I2C_MOT:
+		if (buf_data_cnt == HIBMC_AUX_I2C_WRITE_SUCCESS)
+			return msg->size;
+		else
+			return FIELD_GET(HIBMC_DP_CFG_AUX, aux_status);
+	case DP_AUX_NATIVE_READ:
+	case DP_AUX_I2C_READ | DP_AUX_I2C_MOT:
+		buf_data_cnt--;
+		if (buf_data_cnt != msg->size) {
+			/* only the successful part of data is read */
+			return -EBUSY;
+		}
+
+		/* all data is successfully read */
+		hibmc_dp_aux_read_data(dp, msg->buffer, msg->size);
+		return msg->size;
+	default:
+		return -EINVAL;
+	}
+}
+
+/* ret >= 0 ,ret is size; ret < 0, ret is err code */
+static ssize_t hibmc_dp_aux_xfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg)
+{
+	struct hibmc_dp_dev *dp = container_of(aux, struct hibmc_dp_dev, aux);
+	u32 aux_cmd;
+	int ret;
+	u32 val; /* val will be assigned at the beginning of readl_poll_timeout function */
+
+	writel(0, dp->base + HIBMC_DP_AUX_WR_DATA0);
+	writel(0, dp->base + HIBMC_DP_AUX_WR_DATA1);
+	writel(0, dp->base + HIBMC_DP_AUX_WR_DATA2);
+	writel(0, dp->base + HIBMC_DP_AUX_WR_DATA3);
+
+	hibmc_dp_aux_write_data(dp, msg->buffer, msg->size);
+
+	aux_cmd = hibmc_dp_aux_build_cmd(msg);
+	writel(aux_cmd, dp->base + HIBMC_DP_AUX_CMD_ADDR);
+
+	/* enable aux transfer */
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_AUX_REQ, HIBMC_DP_CFG_AUX_REQ, 0x1);
+	ret = readl_poll_timeout(dp->base + HIBMC_DP_AUX_REQ, val,
+				 !(val & HIBMC_DP_CFG_AUX_REQ), 50, 5000);
+	if (ret) {
+		hibmc_dp_aux_reset(dp);
+		return ret;
+	}
+
+	return hibmc_dp_aux_parse_xfer(dp, msg);
+}
+
+void hibmc_dp_aux_init(struct hibmc_dp_dev *dp)
+{
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_AUX_REQ, HIBMC_DP_CFG_AUX_SYNC_LEN_SEL, 0x0);
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_AUX_REQ, HIBMC_DP_CFG_AUX_TIMER_TIMEOUT, 0x1);
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_AUX_REQ, HIBMC_DP_CFG_AUX_MIN_PULSE_NUM,
+				 HIBMC_DP_MIN_PULSE_NUM);
+
+	dp->aux.transfer = hibmc_dp_aux_xfer;
+	dp->aux.is_remote = 0;
+	drm_dp_aux_init(&dp->aux);
+}
diff --git a/drivers/gpu/drm/hisilicon/hibmc/dp/dp_comm.h b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_comm.h
new file mode 100644
index 0000000000000000000000000000000000000000..29d0bdc4785069fe88d8957debe8af1eb32307d1
--- /dev/null
+++ b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_comm.h
@@ -0,0 +1,63 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* Copyright (c) 2024 Hisilicon Limited. */
+
+#ifndef DP_COMM_H
+#define DP_COMM_H
+
+#include <linux/types.h>
+#include <linux/bitops.h>
+#include <linux/errno.h>
+#include <linux/mutex.h>
+#include <linux/kernel.h>
+#include <linux/bitfield.h>
+#include <linux/io.h>
+#include <drm/drm_dp_helper.h>
+
+#define HIBMC_DP_LANE_NUM_MAX 2
+
+struct hibmc_link_status {
+	bool clock_recovered;
+	bool channel_equalized;
+};
+
+struct hibmc_link_cap {
+	u8 link_rate;
+	u8 lanes;
+};
+
+struct hibmc_dp_link {
+	struct hibmc_link_status status;
+	u8 train_set[HIBMC_DP_LANE_NUM_MAX];
+	struct hibmc_link_cap cap;
+};
+
+struct hibmc_dp_dev {
+	struct drm_dp_aux aux;
+	struct drm_device *dev;
+	void __iomem *base;
+	struct mutex lock; /* protects concurrent RW in hibmc_dp_reg_write_field() */
+	struct hibmc_dp_link link;
+	u8 dpcd[DP_RECEIVER_CAP_SIZE];
+};
+
+#define dp_field_modify(reg_value, mask, val)				\
+	do {								\
+		(reg_value) &= ~(mask);					\
+		(reg_value) |= FIELD_PREP(mask, val);			\
+	} while (0)							\
+
+#define hibmc_dp_reg_write_field(dp, offset, mask, val)			\
+	do {								\
+		typeof(dp) _dp = dp;					\
+		typeof(_dp->base) addr = (_dp->base + (offset));	\
+		mutex_lock(&_dp->lock);					\
+		u32 reg_value = readl(addr);				\
+		dp_field_modify(reg_value, mask, val);			\
+		writel(reg_value, addr);				\
+		mutex_unlock(&_dp->lock);				\
+	} while (0)
+
+void hibmc_dp_aux_init(struct hibmc_dp_dev *dp);
+int hibmc_dp_link_training(struct hibmc_dp_dev *dp);
+
+#endif
diff --git a/drivers/gpu/drm/hisilicon/hibmc/dp/dp_config.h b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_config.h
new file mode 100644
index 0000000000000000000000000000000000000000..74dd9956144e4e352d13879b0060333f0c6c5fae
--- /dev/null
+++ b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_config.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* Copyright (c) 2024 Hisilicon Limited. */
+
+#ifndef DP_CONFIG_H
+#define DP_CONFIG_H
+
+#define HIBMC_DP_BPP			24
+#define HIBMC_DP_SYMBOL_PER_FCLK	4
+#define HIBMC_DP_MSA1			0x20
+#define HIBMC_DP_MSA2			0x845c00
+#define HIBMC_DP_OFFSET			0x1e0000
+#define HIBMC_DP_HDCP			0x2
+#define HIBMC_DP_INT_RST		0xffff
+#define HIBMC_DP_DPTX_RST		0x3ff
+#define HIBMC_DP_CLK_EN			0x7
+#define HIBMC_DP_SYNC_EN_MASK		0x3
+#define HIBMC_DP_LINK_RATE_CAL		27
+
+#endif
diff --git a/drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.c b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.c
new file mode 100644
index 0000000000000000000000000000000000000000..2b0cdb0d077ae982f0c0748dcb6fe4cc8880bd9e
--- /dev/null
+++ b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.c
@@ -0,0 +1,220 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+// Copyright (c) 2024 Hisilicon Limited.
+
+#include <linux/io.h>
+#include <linux/delay.h>
+#include "dp_config.h"
+#include "dp_comm.h"
+#include "dp_reg.h"
+#include "dp_hw.h"
+
+static void hibmc_dp_set_tu(struct hibmc_dp_dev *dp, struct drm_display_mode *mode)
+{
+	u32 tu_symbol_frac_size;
+	u32 tu_symbol_size;
+	u32 rate_ks;
+	u8 lane_num;
+	u32 value;
+	u32 bpp;
+
+	lane_num = dp->link.cap.lanes;
+	if (lane_num == 0) {
+		DRM_ERROR("set tu failed, lane num cannot be 0!\n");
+		return;
+	}
+
+	bpp = HIBMC_DP_BPP;
+	rate_ks = dp->link.cap.link_rate * HIBMC_DP_LINK_RATE_CAL;
+	value = (mode->clock * bpp * 5) / (61 * lane_num * rate_ks);
+
+	if (value % 10 == 9) { /* 9 carry */
+		tu_symbol_size = value / 10 + 1;
+		tu_symbol_frac_size = 0;
+	} else {
+		tu_symbol_size = value / 10;
+		tu_symbol_frac_size = value % 10 + 1;
+	}
+
+	drm_dbg_dp(dp->dev, "tu value: %u.%u value: %u\n",
+		   tu_symbol_size, tu_symbol_frac_size, value);
+
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_VIDEO_PACKET,
+				 HIBMC_DP_CFG_STREAM_TU_SYMBOL_SIZE, tu_symbol_size);
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_VIDEO_PACKET,
+				 HIBMC_DP_CFG_STREAM_TU_SYMBOL_FRAC_SIZE, tu_symbol_frac_size);
+}
+
+static void hibmc_dp_set_sst(struct hibmc_dp_dev *dp, struct drm_display_mode *mode)
+{
+	u32 hblank_size;
+	u32 htotal_size;
+	u32 htotal_int;
+	u32 hblank_int;
+	u32 fclk; /* flink_clock */
+
+	fclk = dp->link.cap.link_rate * HIBMC_DP_LINK_RATE_CAL;
+
+	/* Considering the effect of spread spectrum, the value may be deviated.
+	 * The coefficient (0.9947) is used to offset the deviation.
+	 */
+	htotal_int = mode->htotal * 9947 / 10000;
+	htotal_size = htotal_int * fclk / (HIBMC_DP_SYMBOL_PER_FCLK * (mode->clock / 1000));
+
+	hblank_int = mode->htotal - mode->hdisplay - mode->hdisplay * 53 / 10000;
+	hblank_size = hblank_int * fclk * 9947 /
+		      (mode->clock * 10 * HIBMC_DP_SYMBOL_PER_FCLK);
+
+	drm_dbg_dp(dp->dev, "h_active %u v_active %u htotal_size %u hblank_size %u",
+		   mode->hdisplay, mode->vdisplay, htotal_size, hblank_size);
+	drm_dbg_dp(dp->dev, "flink_clock %u pixel_clock %d", fclk, mode->clock / 1000);
+
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_VIDEO_HORIZONTAL_SIZE,
+				 HIBMC_DP_CFG_STREAM_HTOTAL_SIZE, htotal_size);
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_VIDEO_HORIZONTAL_SIZE,
+				 HIBMC_DP_CFG_STREAM_HBLANK_SIZE, hblank_size);
+}
+
+static void hibmc_dp_link_cfg(struct hibmc_dp_dev *dp, struct drm_display_mode *mode)
+{
+	u32 timing_delay;
+	u32 vblank;
+	u32 hstart;
+	u32 vstart;
+
+	vblank = mode->vtotal - mode->vdisplay;
+	timing_delay = mode->htotal - mode->hsync_start;
+	hstart = mode->htotal - mode->hsync_start;
+	vstart = mode->vtotal - mode->vsync_start;
+
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_TIMING_GEN_CONFIG0,
+				 HIBMC_DP_CFG_TIMING_GEN0_HBLANK, mode->htotal - mode->hdisplay);
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_TIMING_GEN_CONFIG0,
+				 HIBMC_DP_CFG_TIMING_GEN0_HACTIVE, mode->hdisplay);
+
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_TIMING_GEN_CONFIG2,
+				 HIBMC_DP_CFG_TIMING_GEN0_VBLANK, vblank);
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_TIMING_GEN_CONFIG2,
+				 HIBMC_DP_CFG_TIMING_GEN0_VACTIVE, mode->vdisplay);
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_TIMING_GEN_CONFIG3,
+				 HIBMC_DP_CFG_TIMING_GEN0_VFRONT_PORCH,
+				 mode->vsync_start - mode->vdisplay);
+
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_VIDEO_CONFIG0,
+				 HIBMC_DP_CFG_STREAM_HACTIVE, mode->hdisplay);
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_VIDEO_CONFIG0,
+				 HIBMC_DP_CFG_STREAM_HBLANK, mode->htotal - mode->hdisplay);
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_VIDEO_CONFIG2,
+				 HIBMC_DP_CFG_STREAM_HSYNC_WIDTH,
+				 mode->hsync_end - mode->hsync_start);
+
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_VIDEO_CONFIG1,
+				 HIBMC_DP_CFG_STREAM_VACTIVE, mode->vdisplay);
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_VIDEO_CONFIG1,
+				 HIBMC_DP_CFG_STREAM_VBLANK, vblank);
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_VIDEO_CONFIG3,
+				 HIBMC_DP_CFG_STREAM_VFRONT_PORCH,
+				 mode->vsync_start - mode->vdisplay);
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_VIDEO_CONFIG3,
+				 HIBMC_DP_CFG_STREAM_VSYNC_WIDTH,
+				 mode->vsync_end - mode->vsync_start);
+
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_VIDEO_MSA0,
+				 HIBMC_DP_CFG_STREAM_VSTART, vstart);
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_VIDEO_MSA0,
+				 HIBMC_DP_CFG_STREAM_HSTART, hstart);
+
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_VIDEO_CTRL, HIBMC_DP_CFG_STREAM_VSYNC_POLARITY,
+				 mode->flags & DRM_MODE_FLAG_PVSYNC ? 1 : 0);
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_VIDEO_CTRL, HIBMC_DP_CFG_STREAM_HSYNC_POLARITY,
+				 mode->flags & DRM_MODE_FLAG_PHSYNC ? 1 : 0);
+
+	/* MSA mic 0 and 1 */
+	writel(HIBMC_DP_MSA1, dp->base + HIBMC_DP_VIDEO_MSA1);
+	writel(HIBMC_DP_MSA2, dp->base + HIBMC_DP_VIDEO_MSA2);
+
+	hibmc_dp_set_tu(dp, mode);
+
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_VIDEO_CTRL, HIBMC_DP_CFG_STREAM_RGB_ENABLE, 0x1);
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_VIDEO_CTRL, HIBMC_DP_CFG_STREAM_VIDEO_MAPPING, 0);
+
+	/* divide 2: up even */
+	if (timing_delay % 2)
+		timing_delay++;
+
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_TIMING_MODEL_CTRL,
+				 HIBMC_DP_CFG_PIXEL_NUM_TIMING_MODE_SEL1, timing_delay);
+
+	hibmc_dp_set_sst(dp, mode);
+}
+
+int hibmc_dp_hw_init(struct hibmc_dp *dp)
+{
+	struct drm_device *drm_dev = dp->drm_dev;
+	struct hibmc_dp_dev *dp_dev;
+
+	dp_dev = devm_kzalloc(drm_dev->dev, sizeof(struct hibmc_dp_dev), GFP_KERNEL);
+	if (!dp_dev)
+		return -ENOMEM;
+
+	mutex_init(&dp_dev->lock);
+
+	dp->dp_dev = dp_dev;
+
+	dp_dev->dev = drm_dev;
+	dp_dev->base = dp->mmio + HIBMC_DP_OFFSET;
+
+	hibmc_dp_aux_init(dp_dev);
+
+	dp_dev->link.cap.lanes = 0x2;
+	dp_dev->link.cap.link_rate = DP_LINK_BW_2_7;
+
+	/* hdcp data */
+	writel(HIBMC_DP_HDCP, dp_dev->base + HIBMC_DP_HDCP_CFG);
+	/* int init */
+	writel(0, dp_dev->base + HIBMC_DP_INTR_ENABLE);
+	writel(HIBMC_DP_INT_RST, dp_dev->base + HIBMC_DP_INTR_ORIGINAL_STATUS);
+	/* rst */
+	writel(HIBMC_DP_DPTX_RST, dp_dev->base + HIBMC_DP_DPTX_RST_CTRL);
+	/* clock enable */
+	writel(HIBMC_DP_CLK_EN, dp_dev->base + HIBMC_DP_DPTX_CLK_CTRL);
+
+	return 0;
+}
+
+void hibmc_dp_display_en(struct hibmc_dp *dp, bool enable)
+{
+	struct hibmc_dp_dev *dp_dev = dp->dp_dev;
+
+	if (enable) {
+		hibmc_dp_reg_write_field(dp_dev, HIBMC_DP_VIDEO_CTRL, BIT(0), 0x1);
+		writel(HIBMC_DP_SYNC_EN_MASK, dp_dev->base + HIBMC_DP_TIMING_SYNC_CTRL);
+		hibmc_dp_reg_write_field(dp_dev, HIBMC_DP_DPTX_GCTL0, BIT(10), 0x1);
+		writel(HIBMC_DP_SYNC_EN_MASK, dp_dev->base + HIBMC_DP_TIMING_SYNC_CTRL);
+	} else {
+		hibmc_dp_reg_write_field(dp_dev, HIBMC_DP_DPTX_GCTL0, BIT(10), 0);
+		writel(HIBMC_DP_SYNC_EN_MASK, dp_dev->base + HIBMC_DP_TIMING_SYNC_CTRL);
+		hibmc_dp_reg_write_field(dp_dev, HIBMC_DP_VIDEO_CTRL, BIT(0), 0);
+		writel(HIBMC_DP_SYNC_EN_MASK, dp_dev->base + HIBMC_DP_TIMING_SYNC_CTRL);
+	}
+
+	msleep(50);
+}
+
+int hibmc_dp_mode_set(struct hibmc_dp *dp, struct drm_display_mode *mode)
+{
+	struct hibmc_dp_dev *dp_dev = dp->dp_dev;
+	int ret;
+
+	if (!dp_dev->link.status.channel_equalized) {
+		ret = hibmc_dp_link_training(dp_dev);
+		if (ret) {
+			DRM_ERROR("dp link training failed, ret: %d\n", ret);
+			return ret;
+		}
+	}
+
+	hibmc_dp_display_en(dp, false);
+	hibmc_dp_link_cfg(dp_dev, mode);
+
+	return 0;
+}
diff --git a/drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.h b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.h
new file mode 100644
index 0000000000000000000000000000000000000000..4dc13b3d9875f4c98bb0aae5c2081354576b5ad4
--- /dev/null
+++ b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.h
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* Copyright (c) 2024 Hisilicon Limited. */
+
+#ifndef DP_KAPI_H
+#define DP_KAPI_H
+
+#include <linux/types.h>
+#include <linux/delay.h>
+#include <drm/drm_device.h>
+#include <drm/drm_encoder.h>
+#include <drm/drm_connector.h>
+#include <drm/drm_print.h>
+
+struct hibmc_dp_dev;
+
+struct hibmc_dp {
+	struct hibmc_dp_dev *dp_dev;
+	struct drm_device *drm_dev;
+	struct drm_encoder encoder;
+	struct drm_connector connector;
+	void __iomem *mmio;
+};
+
+int hibmc_dp_hw_init(struct hibmc_dp *dp);
+int hibmc_dp_mode_set(struct hibmc_dp *dp, struct drm_display_mode *mode);
+void hibmc_dp_display_en(struct hibmc_dp *dp, bool enable);
+
+#endif
diff --git a/drivers/gpu/drm/hisilicon/hibmc/dp/dp_link.c b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_link.c
new file mode 100644
index 0000000000000000000000000000000000000000..40536c7dc18c35008d6f9c7134161483f1b7266d
--- /dev/null
+++ b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_link.c
@@ -0,0 +1,332 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+// Copyright (c) 2024 Hisilicon Limited.
+
+#include <linux/delay.h>
+#include <drm/drm_device.h>
+#include <drm/drm_print.h>
+#include "dp_comm.h"
+#include "dp_reg.h"
+
+#define HIBMC_EQ_MAX_RETRY 5
+
+static int hibmc_dp_link_training_configure(struct hibmc_dp_dev *dp)
+{
+	u8 buf[2];
+	int ret;
+
+	/* DP 2 lane */
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_PHYIF_CTRL0, HIBMC_DP_CFG_LANE_DATA_EN,
+				 dp->link.cap.lanes == 0x2 ? 0x3 : 0x1);
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_DPTX_GCTL0, HIBMC_DP_CFG_PHY_LANE_NUM,
+				 dp->link.cap.lanes == 0x2 ? 0x1 : 0);
+
+	/* enhanced frame */
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_VIDEO_CTRL, HIBMC_DP_CFG_STREAM_FRAME_MODE, 0x1);
+
+	/* set rate and lane count */
+	buf[0] = dp->link.cap.link_rate;
+	buf[1] = DP_LANE_COUNT_ENHANCED_FRAME_EN | dp->link.cap.lanes;
+	ret = drm_dp_dpcd_write(&dp->aux, DP_LINK_BW_SET, buf, sizeof(buf));
+	if (ret != sizeof(buf)) {
+		drm_dbg_dp(dp->dev, "dp aux write link rate and lanes failed, ret: %d\n", ret);
+		return ret >= 0 ? -EIO : ret;
+	}
+
+	/* set 8b/10b and downspread */
+	buf[0] = DP_SPREAD_AMP_0_5;
+	buf[1] = DP_SET_ANSI_8B10B;
+	ret = drm_dp_dpcd_write(&dp->aux, DP_DOWNSPREAD_CTRL, buf, sizeof(buf));
+	if (ret != sizeof(buf)) {
+		drm_dbg_dp(dp->dev, "dp aux write 8b/10b and downspread failed, ret: %d\n", ret);
+		return ret >= 0 ? -EIO : ret;
+	}
+
+	ret = drm_dp_read_dpcd_caps(&dp->aux, dp->dpcd);
+	if (ret)
+		DRM_ERROR("dp aux read dpcd failed, ret: %d\n", ret);
+
+	return ret;
+}
+
+static int hibmc_dp_link_set_pattern(struct hibmc_dp_dev *dp, int pattern)
+{
+	int ret;
+	u8 val;
+	u8 buf;
+
+	buf = (u8)pattern;
+	if (pattern != DP_TRAINING_PATTERN_DISABLE && pattern != DP_TRAINING_PATTERN_4) {
+		buf |= DP_LINK_SCRAMBLING_DISABLE;
+		hibmc_dp_reg_write_field(dp, HIBMC_DP_PHYIF_CTRL0, HIBMC_DP_CFG_SCRAMBLE_EN, 0x1);
+	} else {
+		hibmc_dp_reg_write_field(dp, HIBMC_DP_PHYIF_CTRL0, HIBMC_DP_CFG_SCRAMBLE_EN, 0);
+	}
+
+	switch (pattern) {
+	case DP_TRAINING_PATTERN_DISABLE:
+		val = 0;
+		break;
+	case DP_TRAINING_PATTERN_1:
+		val = 1;
+		break;
+	case DP_TRAINING_PATTERN_2:
+		val = 2;
+		break;
+	case DP_TRAINING_PATTERN_3:
+		val = 3;
+		break;
+	case DP_TRAINING_PATTERN_4:
+		val = 4;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	hibmc_dp_reg_write_field(dp, HIBMC_DP_PHYIF_CTRL0, HIBMC_DP_CFG_PAT_SEL, val);
+
+	ret = drm_dp_dpcd_write(&dp->aux, DP_TRAINING_PATTERN_SET, &buf, sizeof(buf));
+	if (ret != sizeof(buf)) {
+		drm_dbg_dp(dp->dev, "dp aux write training pattern set failed\n");
+		return ret >= 0 ? -EIO : ret;
+	}
+
+	return 0;
+}
+
+static int hibmc_dp_link_training_cr_pre(struct hibmc_dp_dev *dp)
+{
+	u8 *train_set = dp->link.train_set;
+	int ret;
+	u8 i;
+
+	ret = hibmc_dp_link_training_configure(dp);
+	if (ret)
+		return ret;
+
+	ret = hibmc_dp_link_set_pattern(dp, DP_TRAINING_PATTERN_1);
+	if (ret)
+		return ret;
+
+	for (i = 0; i < dp->link.cap.lanes; i++)
+		train_set[i] = DP_TRAIN_VOLTAGE_SWING_LEVEL_2;
+
+	ret = drm_dp_dpcd_write(&dp->aux, DP_TRAINING_LANE0_SET, train_set, dp->link.cap.lanes);
+	if (ret != dp->link.cap.lanes) {
+		drm_dbg_dp(dp->dev, "dp aux write training lane set failed\n");
+		return ret >= 0 ? -EIO : ret;
+	}
+
+	return 0;
+}
+
+static bool hibmc_dp_link_get_adjust_train(struct hibmc_dp_dev *dp,
+					   u8 lane_status[DP_LINK_STATUS_SIZE])
+{
+	u8 train_set[HIBMC_DP_LANE_NUM_MAX] = {0};
+	u8 lane;
+
+	for (lane = 0; lane < dp->link.cap.lanes; lane++)
+		train_set[lane] = drm_dp_get_adjust_request_voltage(lane_status, lane) |
+				  drm_dp_get_adjust_request_pre_emphasis(lane_status, lane);
+
+	if (memcmp(dp->link.train_set, train_set, HIBMC_DP_LANE_NUM_MAX)) {
+		memcpy(dp->link.train_set, train_set, HIBMC_DP_LANE_NUM_MAX);
+		return true;
+	}
+
+	return false;
+}
+
+static inline int hibmc_dp_link_reduce_rate(struct hibmc_dp_dev *dp)
+{
+	switch (dp->link.cap.link_rate) {
+	case DP_LINK_BW_2_7:
+		dp->link.cap.link_rate = DP_LINK_BW_1_62;
+		return 0;
+	case DP_LINK_BW_5_4:
+		dp->link.cap.link_rate = DP_LINK_BW_2_7;
+		return 0;
+	case DP_LINK_BW_8_1:
+		dp->link.cap.link_rate = DP_LINK_BW_5_4;
+		return 0;
+	default:
+		return -EINVAL;
+	}
+}
+
+static inline int hibmc_dp_link_reduce_lane(struct hibmc_dp_dev *dp)
+{
+	switch (dp->link.cap.lanes) {
+	case 0x2:
+		dp->link.cap.lanes--;
+		break;
+	case 0x1:
+		DRM_ERROR("dp link training reduce lane failed, already reach minimum\n");
+		return -EIO;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int hibmc_dp_link_training_cr(struct hibmc_dp_dev *dp)
+{
+	u8 lane_status[DP_LINK_STATUS_SIZE] = {0};
+	bool level_changed;
+	u32 voltage_tries;
+	u32 cr_tries;
+	int ret;
+
+	/*
+	 * DP 1.4 spec define 10 for maxtries value, for pre DP 1.4 version set a limit of 80
+	 * (4 voltage levels x 4 preemphasis levels x 5 identical voltage retries)
+	 */
+
+	voltage_tries = 1;
+	for (cr_tries = 0; cr_tries < 80; cr_tries++) {
+		drm_dp_link_train_clock_recovery_delay(dp->dpcd);
+
+		ret = drm_dp_dpcd_read_link_status(&dp->aux, lane_status);
+		if (ret != DP_LINK_STATUS_SIZE) {
+			DRM_ERROR("Get lane status failed\n");
+			return ret;
+		}
+
+		if (drm_dp_clock_recovery_ok(lane_status, dp->link.cap.lanes)) {
+			drm_dbg_dp(dp->dev, "dp link training cr done\n");
+			dp->link.status.clock_recovered = true;
+			return 0;
+		}
+
+		if (voltage_tries == 5) {
+			drm_dbg_dp(dp->dev, "same voltage tries 5 times\n");
+			dp->link.status.clock_recovered = false;
+			return 0;
+		}
+
+		level_changed = hibmc_dp_link_get_adjust_train(dp, lane_status);
+		ret = drm_dp_dpcd_write(&dp->aux, DP_TRAINING_LANE0_SET, dp->link.train_set,
+					dp->link.cap.lanes);
+		if (ret != dp->link.cap.lanes) {
+			drm_dbg_dp(dp->dev, "Update link training failed\n");
+			return ret >= 0 ? -EIO : ret;
+		}
+
+		voltage_tries = level_changed ? 1 : voltage_tries + 1;
+	}
+
+	DRM_ERROR("dp link training clock recovery 80 times failed\n");
+	dp->link.status.clock_recovered = false;
+
+	return 0;
+}
+
+static int hibmc_dp_link_training_channel_eq(struct hibmc_dp_dev *dp)
+{
+	u8 lane_status[DP_LINK_STATUS_SIZE] = {0};
+	u8 eq_tries;
+	int ret;
+
+	ret = hibmc_dp_link_set_pattern(dp, DP_TRAINING_PATTERN_2);
+	if (ret)
+		return ret;
+
+	for (eq_tries = 0; eq_tries < HIBMC_EQ_MAX_RETRY; eq_tries++) {
+		drm_dp_link_train_channel_eq_delay(dp->dpcd);
+
+		ret = drm_dp_dpcd_read_link_status(&dp->aux, lane_status);
+		if (ret != DP_LINK_STATUS_SIZE) {
+			DRM_ERROR("get lane status failed\n");
+			break;
+		}
+
+		if (!drm_dp_clock_recovery_ok(lane_status, dp->link.cap.lanes)) {
+			drm_dbg_dp(dp->dev, "clock recovery check failed\n");
+			drm_dbg_dp(dp->dev, "cannot continue channel equalization\n");
+			dp->link.status.clock_recovered = false;
+			break;
+		}
+
+		if (drm_dp_channel_eq_ok(lane_status, dp->link.cap.lanes)) {
+			dp->link.status.channel_equalized = true;
+			drm_dbg_dp(dp->dev, "dp link training eq done\n");
+			break;
+		}
+
+		hibmc_dp_link_get_adjust_train(dp, lane_status);
+		ret = drm_dp_dpcd_write(&dp->aux, DP_TRAINING_LANE0_SET,
+					dp->link.train_set, dp->link.cap.lanes);
+		if (ret != dp->link.cap.lanes) {
+			drm_dbg_dp(dp->dev, "Update link training failed\n");
+			ret = (ret >= 0) ? -EIO : ret;
+			break;
+		}
+	}
+
+	if (eq_tries == HIBMC_EQ_MAX_RETRY)
+		DRM_ERROR("channel equalization failed %u times\n", eq_tries);
+
+	hibmc_dp_link_set_pattern(dp, DP_TRAINING_PATTERN_DISABLE);
+
+	return ret < 0 ? ret : 0;
+}
+
+static int hibmc_dp_link_downgrade_training_cr(struct hibmc_dp_dev *dp)
+{
+	if (hibmc_dp_link_reduce_rate(dp))
+		return hibmc_dp_link_reduce_lane(dp);
+
+	return 0;
+}
+
+static int hibmc_dp_link_downgrade_training_eq(struct hibmc_dp_dev *dp)
+{
+	if ((dp->link.status.clock_recovered && !dp->link.status.channel_equalized)) {
+		if (!hibmc_dp_link_reduce_lane(dp))
+			return 0;
+	}
+
+	return hibmc_dp_link_reduce_rate(dp);
+}
+
+int hibmc_dp_link_training(struct hibmc_dp_dev *dp)
+{
+	struct hibmc_dp_link *link = &dp->link;
+	int ret;
+
+	while (true) {
+		ret = hibmc_dp_link_training_cr_pre(dp);
+		if (ret)
+			goto err;
+
+		ret = hibmc_dp_link_training_cr(dp);
+		if (ret)
+			goto err;
+
+		if (!link->status.clock_recovered) {
+			ret = hibmc_dp_link_downgrade_training_cr(dp);
+			if (ret)
+				goto err;
+			continue;
+		}
+
+		ret = hibmc_dp_link_training_channel_eq(dp);
+		if (ret)
+			goto err;
+
+		if (!link->status.channel_equalized) {
+			ret = hibmc_dp_link_downgrade_training_eq(dp);
+			if (ret)
+				goto err;
+			continue;
+		}
+
+		return 0;
+	}
+
+err:
+	hibmc_dp_link_set_pattern(dp, DP_TRAINING_PATTERN_DISABLE);
+
+	return ret;
+}
diff --git a/drivers/gpu/drm/hisilicon/hibmc/dp/dp_reg.h b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_reg.h
new file mode 100644
index 0000000000000000000000000000000000000000..4a515c726d524a3153c2987815ee90bbff620281
--- /dev/null
+++ b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_reg.h
@@ -0,0 +1,76 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* Copyright (c) 2024 Hisilicon Limited. */
+
+#ifndef DP_REG_H
+#define DP_REG_H
+
+#define HIBMC_DP_AUX_CMD_ADDR			0x50
+#define HIBMC_DP_AUX_WR_DATA0			0x54
+#define HIBMC_DP_AUX_WR_DATA1			0x58
+#define HIBMC_DP_AUX_WR_DATA2			0x5c
+#define HIBMC_DP_AUX_WR_DATA3			0x60
+#define HIBMC_DP_AUX_RD_DATA0			0x64
+#define HIBMC_DP_AUX_REQ			0x74
+#define HIBMC_DP_AUX_STATUS			0x78
+#define HIBMC_DP_PHYIF_CTRL0			0xa0
+#define HIBMC_DP_VIDEO_CTRL			0x100
+#define HIBMC_DP_VIDEO_CONFIG0			0x104
+#define HIBMC_DP_VIDEO_CONFIG1			0x108
+#define HIBMC_DP_VIDEO_CONFIG2			0x10c
+#define HIBMC_DP_VIDEO_CONFIG3			0x110
+#define HIBMC_DP_VIDEO_PACKET			0x114
+#define HIBMC_DP_VIDEO_MSA0			0x118
+#define HIBMC_DP_VIDEO_MSA1			0x11c
+#define HIBMC_DP_VIDEO_MSA2			0x120
+#define HIBMC_DP_VIDEO_HORIZONTAL_SIZE		0X124
+#define HIBMC_DP_TIMING_GEN_CONFIG0		0x26c
+#define HIBMC_DP_TIMING_GEN_CONFIG2		0x274
+#define HIBMC_DP_TIMING_GEN_CONFIG3		0x278
+#define HIBMC_DP_HDCP_CFG			0x600
+#define HIBMC_DP_DPTX_RST_CTRL			0x700
+#define HIBMC_DP_DPTX_CLK_CTRL			0x704
+#define HIBMC_DP_DPTX_GCTL0			0x708
+#define HIBMC_DP_INTR_ENABLE			0x720
+#define HIBMC_DP_INTR_ORIGINAL_STATUS		0x728
+#define HIBMC_DP_TIMING_MODEL_CTRL		0x884
+#define HIBMC_DP_TIMING_SYNC_CTRL		0xFF0
+
+#define HIBMC_DP_CFG_AUX_SYNC_LEN_SEL		BIT(1)
+#define HIBMC_DP_CFG_AUX_TIMER_TIMEOUT		BIT(2)
+#define HIBMC_DP_CFG_STREAM_FRAME_MODE		BIT(6)
+#define HIBMC_DP_CFG_AUX_MIN_PULSE_NUM		GENMASK(13, 9)
+#define HIBMC_DP_CFG_LANE_DATA_EN		GENMASK(11, 8)
+#define HIBMC_DP_CFG_PHY_LANE_NUM		GENMASK(2, 1)
+#define HIBMC_DP_CFG_AUX_REQ			BIT(0)
+#define HIBMC_DP_CFG_AUX_RST_N			BIT(4)
+#define HIBMC_DP_CFG_AUX_TIMEOUT		BIT(0)
+#define HIBMC_DP_CFG_AUX_READY_DATA_BYTE	GENMASK(16, 12)
+#define HIBMC_DP_CFG_AUX			GENMASK(24, 17)
+#define HIBMC_DP_CFG_AUX_STATUS			GENMASK(11, 4)
+#define HIBMC_DP_CFG_SCRAMBLE_EN		BIT(0)
+#define HIBMC_DP_CFG_PAT_SEL			GENMASK(7, 4)
+#define HIBMC_DP_CFG_TIMING_GEN0_HACTIVE	GENMASK(31, 16)
+#define HIBMC_DP_CFG_TIMING_GEN0_HBLANK		GENMASK(15, 0)
+#define HIBMC_DP_CFG_TIMING_GEN0_VACTIVE	GENMASK(31, 16)
+#define HIBMC_DP_CFG_TIMING_GEN0_VBLANK		GENMASK(15, 0)
+#define HIBMC_DP_CFG_TIMING_GEN0_VFRONT_PORCH	GENMASK(31, 16)
+#define HIBMC_DP_CFG_STREAM_HACTIVE		GENMASK(31, 16)
+#define HIBMC_DP_CFG_STREAM_HBLANK		GENMASK(15, 0)
+#define HIBMC_DP_CFG_STREAM_HSYNC_WIDTH		GENMASK(15, 0)
+#define HIBMC_DP_CFG_STREAM_VACTIVE		GENMASK(31, 16)
+#define HIBMC_DP_CFG_STREAM_VBLANK		GENMASK(15, 0)
+#define HIBMC_DP_CFG_STREAM_VFRONT_PORCH	GENMASK(31, 16)
+#define HIBMC_DP_CFG_STREAM_VSYNC_WIDTH		GENMASK(15, 0)
+#define HIBMC_DP_CFG_STREAM_VSTART		GENMASK(31, 16)
+#define HIBMC_DP_CFG_STREAM_HSTART		GENMASK(15, 0)
+#define HIBMC_DP_CFG_STREAM_VSYNC_POLARITY	BIT(8)
+#define HIBMC_DP_CFG_STREAM_HSYNC_POLARITY	BIT(7)
+#define HIBMC_DP_CFG_STREAM_RGB_ENABLE		BIT(1)
+#define HIBMC_DP_CFG_STREAM_VIDEO_MAPPING	GENMASK(5, 2)
+#define HIBMC_DP_CFG_PIXEL_NUM_TIMING_MODE_SEL1	GENMASK(31, 16)
+#define HIBMC_DP_CFG_STREAM_TU_SYMBOL_SIZE	GENMASK(5, 0)
+#define HIBMC_DP_CFG_STREAM_TU_SYMBOL_FRAC_SIZE	GENMASK(9, 6)
+#define HIBMC_DP_CFG_STREAM_HTOTAL_SIZE		GENMASK(31, 16)
+#define HIBMC_DP_CFG_STREAM_HBLANK_SIZE		GENMASK(15, 0)
+
+#endif
diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_de.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_de.c
index 747b64aaa5f6bb19a748cfd7d1bfe6e4980f6893..645e0c2908e0bf105639a2688eb80759d1587d51 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_de.c
+++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_de.c
@@ -162,37 +162,6 @@ static const struct drm_plane_helper_funcs hibmc_plane_helper_funcs = {
 	.atomic_update = hibmc_plane_atomic_update,
 };
 
-static struct drm_plane *hibmc_plane_init(struct hibmc_drm_private *priv)
-{
-	struct drm_device *dev = priv->dev;
-	struct drm_plane *plane;
-	int ret = 0;
-
-	plane = devm_kzalloc(dev->dev, sizeof(*plane), GFP_KERNEL);
-	if (!plane) {
-		DRM_ERROR("failed to alloc memory when init plane\n");
-		return ERR_PTR(-ENOMEM);
-	}
-	/*
-	 * plane init
-	 * TODO: Now only support primary plane, overlay planes
-	 * need to do.
-	 */
-	ret = drm_universal_plane_init(dev, plane, 1, &hibmc_plane_funcs,
-				       channel_formats1,
-				       ARRAY_SIZE(channel_formats1),
-				       NULL,
-				       DRM_PLANE_TYPE_PRIMARY,
-				       NULL);
-	if (ret) {
-		DRM_ERROR("failed to init plane: %d\n", ret);
-		return ERR_PTR(ret);
-	}
-
-	drm_plane_helper_add(plane, &hibmc_plane_helper_funcs);
-	return plane;
-}
-
 static void hibmc_crtc_atomic_enable(struct drm_crtc *crtc,
 				     struct drm_crtc_state *old_state)
 {
@@ -466,22 +435,24 @@ static const struct drm_crtc_helper_funcs hibmc_crtc_helper_funcs = {
 int hibmc_de_init(struct hibmc_drm_private *priv)
 {
 	struct drm_device *dev = priv->dev;
-	struct drm_crtc *crtc;
-	struct drm_plane *plane;
+	struct drm_crtc *crtc = &priv->crtc;
+	struct drm_plane *plane = &priv->primary_plane;
 	int ret;
 
-	plane = hibmc_plane_init(priv);
-	if (IS_ERR(plane)) {
-		DRM_ERROR("failed to create plane: %ld\n", PTR_ERR(plane));
-		return PTR_ERR(plane);
-	}
+	ret = drm_universal_plane_init(dev, plane, 1, &hibmc_plane_funcs,
+				       channel_formats1,
+				       ARRAY_SIZE(channel_formats1),
+				       NULL,
+				       DRM_PLANE_TYPE_PRIMARY,
+				       NULL);
 
-	crtc = devm_kzalloc(dev->dev, sizeof(*crtc), GFP_KERNEL);
-	if (!crtc) {
-		DRM_ERROR("failed to alloc memory when init crtc\n");
-		return -ENOMEM;
+	if (ret) {
+		DRM_ERROR("failed to init plane: %d\n", ret);
+		return ret;
 	}
 
+	drm_plane_helper_add(plane, &hibmc_plane_helper_funcs);
+
 	ret = drm_crtc_init_with_planes(dev, crtc, plane,
 					NULL, &hibmc_crtc_funcs, NULL);
 	if (ret) {
diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_dp.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_dp.c
new file mode 100644
index 0000000000000000000000000000000000000000..9c2ddd92fa54934816d8112e7341df08096f3c7a
--- /dev/null
+++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_dp.c
@@ -0,0 +1,118 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+// Copyright (c) 2024 Hisilicon Limited.
+
+#include <linux/io.h>
+
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_simple_kms_helper.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_edid.h>
+
+#include "hibmc_drm_drv.h"
+#include "dp/dp_hw.h"
+
+static int hibmc_dp_connector_get_modes(struct drm_connector *connector)
+{
+	int count;
+
+	count = drm_add_modes_noedid(connector, connector->dev->mode_config.max_width,
+				     connector->dev->mode_config.max_height);
+	drm_set_preferred_mode(connector, 1024, 768); // temporary implementation
+
+	return count;
+}
+
+static const struct drm_connector_helper_funcs hibmc_dp_conn_helper_funcs = {
+	.get_modes = hibmc_dp_connector_get_modes,
+};
+
+static const struct drm_connector_funcs hibmc_dp_conn_funcs = {
+	.reset = drm_atomic_helper_connector_reset,
+	.fill_modes = drm_helper_probe_single_connector_modes,
+	.destroy = drm_connector_cleanup,
+	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static inline int hibmc_dp_prepare(struct hibmc_dp *dp, struct drm_display_mode *mode)
+{
+	int ret;
+
+	hibmc_dp_display_en(dp, false);
+
+	ret = hibmc_dp_mode_set(dp, mode);
+	if (ret)
+		DRM_ERROR("hibmc dp mode set failed: %d\n", ret);
+
+	return ret;
+}
+
+static void hibmc_dp_encoder_enable(struct drm_encoder *drm_encoder,
+				    struct drm_atomic_state *state)
+{
+	struct hibmc_dp *dp = container_of(drm_encoder, struct hibmc_dp, encoder);
+	struct drm_display_mode *mode = &drm_encoder->crtc->state->mode;
+
+	if (hibmc_dp_prepare(dp, mode))
+		return;
+
+	hibmc_dp_display_en(dp, true);
+}
+
+static void hibmc_dp_encoder_disable(struct drm_encoder *drm_encoder,
+				     struct drm_atomic_state *state)
+{
+	struct hibmc_dp *dp = container_of(drm_encoder, struct hibmc_dp, encoder);
+
+	hibmc_dp_display_en(dp, false);
+}
+
+static const struct drm_encoder_helper_funcs hibmc_dp_encoder_helper_funcs = {
+	.atomic_enable = hibmc_dp_encoder_enable,
+	.atomic_disable = hibmc_dp_encoder_disable,
+};
+
+int hibmc_dp_init(struct hibmc_drm_private *priv)
+{
+	struct drm_device *dev = priv->dev;
+	struct drm_crtc *crtc = &priv->crtc;
+	struct hibmc_dp *dp = &priv->dp;
+	struct drm_connector *connector = &dp->connector;
+	struct drm_encoder *encoder = &dp->encoder;
+	int ret;
+
+	dp->mmio = priv->mmio;
+	dp->drm_dev = dev;
+
+	ret = hibmc_dp_hw_init(&priv->dp);
+	if (ret) {
+		DRM_ERROR("hibmc dp hw init failed: %d\n", ret);
+		return ret;
+	}
+
+	hibmc_dp_display_en(&priv->dp, false);
+
+	encoder->possible_crtcs = drm_crtc_mask(crtc);
+	ret = drmm_encoder_init(dev, encoder, NULL, DRM_MODE_ENCODER_TMDS, NULL);
+	if (ret) {
+		DRM_ERROR("init dp encoder failed: %d\n", ret);
+		return ret;
+	}
+
+	drm_encoder_helper_add(encoder, &hibmc_dp_encoder_helper_funcs);
+
+	ret = drm_connector_init(dev, connector, &hibmc_dp_conn_funcs,
+				 DRM_MODE_CONNECTOR_DisplayPort);
+	if (ret) {
+		DRM_ERROR("init dp connector failed: %d\n", ret);
+		return ret;
+	}
+
+	drm_connector_helper_add(connector, &hibmc_dp_conn_helper_funcs);
+
+	drm_connector_attach_encoder(connector, encoder);
+
+	return 0;
+}
diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
index 6f616dbf37d204a024416265d108eb21c354e99e..e9e1ce2a1e8ac36152543f9a7d1070849d3591c8 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
+++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
@@ -32,6 +32,10 @@ static const struct file_operations hibmc_fops = {
 	DRM_VRAM_MM_FILE_OPERATIONS
 };
 
+#define HIBMC_DP_HOST_SERDES_CTRL		0x1f001c
+#define HIBMC_DP_HOST_SERDES_CTRL_VAL		0x8a00
+#define HIBMC_DP_HOST_SERDES_CTRL_MASK		0x7ffff
+
 static irqreturn_t hibmc_drm_interrupt(int irq, void *arg)
 {
 	struct drm_device *dev = (struct drm_device *)arg;
@@ -107,6 +111,14 @@ static int hibmc_kms_init(struct hibmc_drm_private *priv)
 		return ret;
 	}
 
+	/* if DP existed, init DP */
+	if ((readl(priv->mmio + HIBMC_DP_HOST_SERDES_CTRL) &
+	     HIBMC_DP_HOST_SERDES_CTRL_MASK) == HIBMC_DP_HOST_SERDES_CTRL_VAL) {
+		ret = hibmc_dp_init(priv);
+		if (ret)
+			DRM_ERROR("failed to init dp: %d\n", ret);
+	}
+
 	ret = hibmc_vdac_init(priv);
 	if (ret) {
 		DRM_ERROR("failed to init vdac: %d\n", ret);
@@ -366,6 +378,8 @@ static int hibmc_pci_probe(struct pci_dev *pdev,
 		goto err_free;
 	}
 
+	pci_set_master(pdev);
+
 	ret = hibmc_load(dev);
 	if (ret) {
 		DRM_ERROR("failed to load hibmc: %d\n", ret);
diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h
index b0d2f79b43b9f56f18853cbff5f75af0e1b12ced..146392eca415008a68c0d1d3334b332ed0d6af04 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h
+++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h
@@ -22,6 +22,7 @@
 #include <drm/drm_edid.h>
 #include <drm/drm_fb_helper.h>
 #include <drm/drm_framebuffer.h>
+#include "dp/dp_hw.h"
 
 struct drm_device;
 struct drm_gem_object;
@@ -37,9 +38,10 @@ struct hibmc_fbdev {
 	int size;
 };
 
-struct hibmc_connector {
-	struct drm_connector base;
-
+struct hibmc_vdac {
+	struct drm_device *dev;
+	struct drm_encoder encoder;
+	struct drm_connector connector;
 	struct i2c_adapter adapter;
 	struct i2c_algo_bit_data bit_data;
 };
@@ -54,8 +56,10 @@ struct hibmc_drm_private {
 
 	/* drm */
 	struct drm_device  *dev;
- 	struct drm_encoder encoder;
-	struct hibmc_connector connector;
+	struct drm_plane primary_plane;
+	struct drm_crtc crtc;
+	struct hibmc_vdac vdac;
+	struct hibmc_dp dp;
 	bool mode_config_initialized;
 
 	/* fbdev */
@@ -64,9 +68,9 @@ struct hibmc_drm_private {
 
 #define to_hibmc_framebuffer(x) container_of(x, struct hibmc_framebuffer, fb)
 
-static inline struct hibmc_connector *to_hibmc_connector(struct drm_connector *connector)
+static inline struct hibmc_vdac *to_hibmc_vdac(struct drm_connector *connector)
 {
-	return container_of(connector, struct hibmc_connector, base);
+	return container_of(connector, struct hibmc_vdac, connector);
 }
 
 static inline struct hibmc_drm_private *to_hibmc_drm_private(struct drm_device *dev)
@@ -95,7 +99,8 @@ int hibmc_mm_init(struct hibmc_drm_private *hibmc);
 void hibmc_mm_fini(struct hibmc_drm_private *hibmc);
 int hibmc_dumb_create(struct drm_file *file, struct drm_device *dev,
 		      struct drm_mode_create_dumb *args);
-int hibmc_ddc_create(struct drm_device *drm_dev, struct hibmc_connector *connector);
+int hibmc_ddc_create(struct drm_device *drm_dev, struct hibmc_vdac *connector);
+int hibmc_dp_init(struct hibmc_drm_private *priv);
 
 extern const struct drm_mode_config_funcs hibmc_mode_funcs;
 
diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_i2c.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_i2c.c
index 86d712090d873b184d6103785130d2b26492ec1f..7ebd684ac07dfbb73ed4623561cd924258d33728 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_i2c.c
+++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_i2c.c
@@ -25,8 +25,8 @@
 
 static void hibmc_set_i2c_signal(void *data, u32 mask, int value)
 {
-	struct hibmc_connector *hibmc_connector = data;
-	struct hibmc_drm_private *priv = to_hibmc_drm_private(hibmc_connector->base.dev);
+	struct hibmc_vdac *vdac = data;
+	struct hibmc_drm_private *priv = to_hibmc_drm_private(vdac->connector.dev);
 	u32 tmp_dir = readl(priv->mmio + GPIO_DATA_DIRECTION);
 
 	if (value) {
@@ -45,8 +45,8 @@ static void hibmc_set_i2c_signal(void *data, u32 mask, int value)
 
 static int hibmc_get_i2c_signal(void *data, u32 mask)
 {
-	struct hibmc_connector *hibmc_connector = data;
-	struct hibmc_drm_private *priv = to_hibmc_drm_private(hibmc_connector->base.dev);
+	struct hibmc_vdac *vdac = data;
+	struct hibmc_drm_private *priv = to_hibmc_drm_private(vdac->connector.dev);
 	u32 tmp_dir = readl(priv->mmio + GPIO_DATA_DIRECTION);
 
 	if ((tmp_dir & mask) != mask) {
@@ -77,23 +77,21 @@ static int hibmc_ddc_getscl(void *data)
 	return hibmc_get_i2c_signal(data, I2C_SCL_MASK);
 }
 
-int hibmc_ddc_create(struct drm_device *drm_dev,
-		     struct hibmc_connector *connector)
+int hibmc_ddc_create(struct drm_device *drm_dev, struct hibmc_vdac *vdac)
 {
-	connector->adapter.owner = THIS_MODULE;
-	connector->adapter.class = I2C_CLASS_DDC;
-	snprintf(connector->adapter.name, I2C_NAME_SIZE, "HIS i2c bit bus");
-	connector->adapter.dev.parent = &drm_dev->pdev->dev;
-	i2c_set_adapdata(&connector->adapter, connector);
-	connector->adapter.algo_data = &connector->bit_data;
-
-	connector->bit_data.udelay = 20;
-	connector->bit_data.timeout = usecs_to_jiffies(2000);
-	connector->bit_data.data = connector;
-	connector->bit_data.setsda = hibmc_ddc_setsda;
-	connector->bit_data.setscl = hibmc_ddc_setscl;
-	connector->bit_data.getsda = hibmc_ddc_getsda;
-	connector->bit_data.getscl = hibmc_ddc_getscl;
-
-	return i2c_bit_add_bus(&connector->adapter);
+	vdac->adapter.owner = THIS_MODULE;
+	snprintf(vdac->adapter.name, I2C_NAME_SIZE, "HIS i2c bit bus");
+	vdac->adapter.dev.parent = &drm_dev->pdev->dev;
+	i2c_set_adapdata(&vdac->adapter, vdac);
+	vdac->adapter.algo_data = &vdac->bit_data;
+
+	vdac->bit_data.udelay = 20;
+	vdac->bit_data.timeout = usecs_to_jiffies(2000);
+	vdac->bit_data.data = vdac;
+	vdac->bit_data.setsda = hibmc_ddc_setsda;
+	vdac->bit_data.setscl = hibmc_ddc_setscl;
+	vdac->bit_data.getsda = hibmc_ddc_getsda;
+	vdac->bit_data.getscl = hibmc_ddc_getscl;
+
+	return i2c_bit_add_bus(&vdac->adapter);
 }
diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c
index bc746969ced828479178baa7e6a0e0fcbc1e4a07..0995e28a09101aec65cb3fb89005227a49a77538 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c
+++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c
@@ -56,9 +56,9 @@ static int hibmc_connector_get_modes(struct drm_connector *connector)
 {
 	int count;
 	void *edid;
-	struct hibmc_connector *hibmc_connector = to_hibmc_connector(connector);
+	struct hibmc_vdac *vdac = to_hibmc_vdac(connector);
 
-	edid = drm_get_edid(connector, &hibmc_connector->adapter);
+	edid = drm_get_edid(connector, &vdac->adapter);
 	if (edid) {
 		drm_connector_update_edid_property(connector, edid);
 		count = drm_add_edid_modes(connector, edid);
@@ -90,9 +90,9 @@ static enum drm_mode_status hibmc_connector_mode_valid(struct drm_connector *con
 
 static void hibmc_connector_destroy(struct drm_connector *connector)
 {
-	struct hibmc_connector *hibmc_connector = to_hibmc_connector(connector);
+	struct hibmc_vdac *vdac = to_hibmc_vdac(connector);
 
-	i2c_del_adapter(&hibmc_connector->adapter);
+	i2c_del_adapter(&vdac->adapter);
 	drm_connector_cleanup(connector);
 }
 
@@ -163,20 +163,19 @@ static const struct drm_encoder_funcs hibmc_encoder_funcs = {
 int hibmc_vdac_init(struct hibmc_drm_private *priv)
 {
 	struct drm_device *dev = priv->dev;
-	struct hibmc_connector *hibmc_connector = &priv->connector;
- 	struct drm_encoder *encoder = &priv->encoder;
-	struct drm_connector *connector = &hibmc_connector->base;
+	struct hibmc_vdac *vdac = &priv->vdac;
+	struct drm_encoder *encoder = &vdac->encoder;
+	struct drm_connector *connector = &vdac->connector;
 	int ret;
 
-	ret = hibmc_ddc_create(dev, hibmc_connector);
+	ret = hibmc_ddc_create(dev, vdac);
 	if (ret) {
 		DRM_ERROR("failed to create ddc: %d\n", ret);
 		return ret;
 	}
 
 	encoder->possible_crtcs = 0x1;
-	ret = drm_encoder_init(dev, encoder, &hibmc_encoder_funcs,
-			       DRM_MODE_ENCODER_DAC, NULL);
+	ret = drmm_encoder_init(dev, encoder, NULL, DRM_MODE_ENCODER_DAC, NULL);
 	if (ret) {
 		DRM_ERROR("failed to init encoder: %d\n", ret);
 		return ret;
@@ -187,7 +186,7 @@ int hibmc_vdac_init(struct hibmc_drm_private *priv)
 	ret = drm_connector_init_with_ddc(dev, connector,
 					  &hibmc_connector_funcs,
 					  DRM_MODE_CONNECTOR_VGA,
-					  &hibmc_connector->adapter);
+					  &vdac->adapter);
 	if (ret) {
 		DRM_ERROR("failed to init connector: %d\n", ret);
 		return ERR_PTR(ret);
diff --git a/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c b/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c
index 5bf8138941ded16c498c50df53c31c058fc77987..bdcf9c6ae9e9ec07e63c6e9aadf9e19c467ba6dd 100644
--- a/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c
+++ b/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c
@@ -18,6 +18,7 @@
 #include <linux/platform_device.h>
 
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_device.h>
 #include <drm/drm_encoder_slave.h>
 #include <drm/drm_mipi_dsi.h>
diff --git a/drivers/gpu/drm/i2c/tda998x_drv.c b/drivers/gpu/drm/i2c/tda998x_drv.c
index 84c6d4c91c658cb777817c64f86331ec97728414..6c218bace2ce78c77744d69fa859a8f495522556 100644
--- a/drivers/gpu/drm/i2c/tda998x_drv.c
+++ b/drivers/gpu/drm/i2c/tda998x_drv.c
@@ -14,6 +14,7 @@
 #include <sound/hdmi-codec.h>
 
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_edid.h>
 #include <drm/drm_of.h>
 #include <drm/drm_print.h>
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 85583f91463053dd915878faedebe652dc356c64..b0d20e341443821b113a8e46954b641fa65436bf 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -4137,56 +4137,6 @@ intel_dp_link_down(struct intel_encoder *encoder,
 	}
 }
 
-static void
-intel_dp_extended_receiver_capabilities(struct intel_dp *intel_dp)
-{
-	u8 dpcd_ext[6];
-
-	/*
-	 * Prior to DP1.3 the bit represented by
-	 * DP_EXTENDED_RECEIVER_CAP_FIELD_PRESENT was reserved.
-	 * if it is set DP_DPCD_REV at 0000h could be at a value less than
-	 * the true capability of the panel. The only way to check is to
-	 * then compare 0000h and 2200h.
-	 */
-	if (!(intel_dp->dpcd[DP_TRAINING_AUX_RD_INTERVAL] &
-	      DP_EXTENDED_RECEIVER_CAP_FIELD_PRESENT))
-		return;
-
-	if (drm_dp_dpcd_read(&intel_dp->aux, DP_DP13_DPCD_REV,
-			     &dpcd_ext, sizeof(dpcd_ext)) != sizeof(dpcd_ext)) {
-		DRM_ERROR("DPCD failed read at extended capabilities\n");
-		return;
-	}
-
-	if (intel_dp->dpcd[DP_DPCD_REV] > dpcd_ext[DP_DPCD_REV]) {
-		DRM_DEBUG_KMS("DPCD extended DPCD rev less than base DPCD rev\n");
-		return;
-	}
-
-	if (!memcmp(intel_dp->dpcd, dpcd_ext, sizeof(dpcd_ext)))
-		return;
-
-	DRM_DEBUG_KMS("Base DPCD: %*ph\n",
-		      (int)sizeof(intel_dp->dpcd), intel_dp->dpcd);
-
-	memcpy(intel_dp->dpcd, dpcd_ext, sizeof(dpcd_ext));
-}
-
-bool
-intel_dp_read_dpcd(struct intel_dp *intel_dp)
-{
-	if (drm_dp_dpcd_read(&intel_dp->aux, 0x000, intel_dp->dpcd,
-			     sizeof(intel_dp->dpcd)) < 0)
-		return false; /* aux transfer failed */
-
-	intel_dp_extended_receiver_capabilities(intel_dp);
-
-	DRM_DEBUG_KMS("DPCD: %*ph\n", (int) sizeof(intel_dp->dpcd), intel_dp->dpcd);
-
-	return intel_dp->dpcd[DP_DPCD_REV] != 0;
-}
-
 bool intel_dp_get_colorimetry_status(struct intel_dp *intel_dp)
 {
 	u8 dprx = 0;
@@ -4240,7 +4190,7 @@ intel_edp_init_dpcd(struct intel_dp *intel_dp)
 	/* this function is meant to be called only once */
 	WARN_ON(intel_dp->dpcd[DP_DPCD_REV] != 0);
 
-	if (!intel_dp_read_dpcd(intel_dp))
+	if (drm_dp_read_dpcd_caps(&intel_dp->aux, intel_dp->dpcd) != 0)
 		return false;
 
 	drm_dp_read_desc(&intel_dp->aux, &intel_dp->desc,
@@ -4317,7 +4267,7 @@ intel_edp_init_dpcd(struct intel_dp *intel_dp)
 static bool
 intel_dp_get_dpcd(struct intel_dp *intel_dp)
 {
-	if (!intel_dp_read_dpcd(intel_dp))
+	if (drm_dp_read_dpcd_caps(&intel_dp->aux, intel_dp->dpcd))
 		return false;
 
 	/*
diff --git a/drivers/gpu/drm/i915/display/intel_dp.h b/drivers/gpu/drm/i915/display/intel_dp.h
index 00981fb9414b6a1d4004635ef18ea611b356cd68..ce9ccb876ec7b0bde9d3b6c7d928d3af417104bb 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.h
+++ b/drivers/gpu/drm/i915/display/intel_dp.h
@@ -103,7 +103,6 @@ bool intel_dp_source_supports_hbr3(struct intel_dp *intel_dp);
 bool
 intel_dp_get_link_status(struct intel_dp *intel_dp, u8 *link_status);
 
-bool intel_dp_read_dpcd(struct intel_dp *intel_dp);
 bool intel_dp_get_colorimetry_status(struct intel_dp *intel_dp);
 int intel_dp_link_required(int pixel_clock, int bpp);
 int intel_dp_max_data_rate(int max_link_clock, int max_lanes);
diff --git a/drivers/gpu/drm/i915/display/intel_lspcon.c b/drivers/gpu/drm/i915/display/intel_lspcon.c
index f8f1308643a97d8e1c16c1c18513568b9530ed09..73dbabfcb369593570c43307ce6afafc3938fa07 100644
--- a/drivers/gpu/drm/i915/display/intel_lspcon.c
+++ b/drivers/gpu/drm/i915/display/intel_lspcon.c
@@ -571,7 +571,7 @@ bool lspcon_init(struct intel_digital_port *intel_dig_port)
 		return false;
 	}
 
-	if (!intel_dp_read_dpcd(dp)) {
+	if (drm_dp_read_dpcd_caps(&dp->aux, dp->dpcd) != 0) {
 		DRM_ERROR("LSPCON DPCD read failed\n");
 		return false;
 	}
diff --git a/drivers/gpu/drm/imx/imx-ldb.c b/drivers/gpu/drm/imx/imx-ldb.c
index 116473c2360aa06e19741097043c7b3e87129611..6846c219325b42a2040804974a3ba4a428028fbf 100644
--- a/drivers/gpu/drm/imx/imx-ldb.c
+++ b/drivers/gpu/drm/imx/imx-ldb.c
@@ -20,6 +20,7 @@
 
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_fb_helper.h>
 #include <drm/drm_of.h>
 #include <drm/drm_panel.h>
diff --git a/drivers/gpu/drm/imx/parallel-display.c b/drivers/gpu/drm/imx/parallel-display.c
index e24272428744c7a94139480d64658ed05732d3e6..c42695c918710979fe6451f20eb874fc7c9e5a63 100644
--- a/drivers/gpu/drm/imx/parallel-display.c
+++ b/drivers/gpu/drm/imx/parallel-display.c
@@ -13,6 +13,7 @@
 #include <video/of_display_timing.h>
 
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_fb_helper.h>
 #include <drm/drm_of.h>
 #include <drm/drm_panel.h>
diff --git a/drivers/gpu/drm/ingenic/ingenic-drm.c b/drivers/gpu/drm/ingenic/ingenic-drm.c
index 7e6179fe63f863f14a5a614818a27d898d797f2c..2dbad64461158fe5729c547e745572307599a00c 100644
--- a/drivers/gpu/drm/ingenic/ingenic-drm.c
+++ b/drivers/gpu/drm/ingenic/ingenic-drm.c
@@ -13,6 +13,7 @@
 
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_drv.h>
diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
index 7c68a393391508d09c345bbd02f62a149f605a70..1fefb3fe33e17677819f90b3376b9f56f3ed5b98 100644
--- a/drivers/gpu/drm/mediatek/mtk_dpi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
@@ -19,6 +19,7 @@
 #include <video/videomode.h>
 
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_of.h>
 
diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c
index e82705a33acfdb9fb96c216208953c23282a1eaa..a3fd5afca9dfce88ac5f2ad24b4015a88cddf86f 100644
--- a/drivers/gpu/drm/mediatek/mtk_dsi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
@@ -16,6 +16,7 @@
 #include <video/videomode.h>
 
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_mipi_dsi.h>
 #include <drm/drm_of.h>
 #include <drm/drm_panel.h>
diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c
index 74a54a9e3533912944e3d4f141ce883475d1badf..874d5b8578adf539b51d9fcd634e969a3f06cea5 100644
--- a/drivers/gpu/drm/mediatek/mtk_hdmi.c
+++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c
@@ -23,6 +23,7 @@
 #include <sound/hdmi-codec.h>
 
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_edid.h>
 #include <drm/drm_print.h>
diff --git a/drivers/gpu/drm/msm/dsi/dsi.h b/drivers/gpu/drm/msm/dsi/dsi.h
index 0da8a4e428ad236319aacb4bbbae4a578da02b3e..eff1a4c612584b10f36f9e43b1a0b8d458e7ae97 100644
--- a/drivers/gpu/drm/msm/dsi/dsi.h
+++ b/drivers/gpu/drm/msm/dsi/dsi.h
@@ -9,6 +9,7 @@
 #include <linux/of_platform.h>
 #include <linux/platform_device.h>
 
+#include <drm/drm_bridge.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_mipi_dsi.h>
 #include <drm/drm_panel.h>
diff --git a/drivers/gpu/drm/msm/edp/edp.c b/drivers/gpu/drm/msm/edp/edp.c
index 0f312ac5b6240930a67c400517c08d798fda2e19..ad4e963ccd9b04aa324485e77adcf86d07e8e6d2 100644
--- a/drivers/gpu/drm/msm/edp/edp.c
+++ b/drivers/gpu/drm/msm/edp/edp.c
@@ -178,7 +178,9 @@ int msm_edp_modeset_init(struct msm_edp *edp, struct drm_device *dev,
 		goto fail;
 	}
 
-	encoder->bridge = edp->bridge;
+	ret = drm_bridge_attach(encoder, edp->bridge, NULL);
+	if (ret)
+		goto fail;
 
 	priv->bridges[priv->num_bridges++]       = edp->bridge;
 	priv->connectors[priv->num_connectors++] = edp->connector;
diff --git a/drivers/gpu/drm/msm/edp/edp.h b/drivers/gpu/drm/msm/edp/edp.h
index f2c17858a703ff27371a3941f30116b2eef32f9b..eb34243dad530ea382d07b57f452976b644fffcc 100644
--- a/drivers/gpu/drm/msm/edp/edp.h
+++ b/drivers/gpu/drm/msm/edp/edp.h
@@ -10,6 +10,7 @@
 #include <linux/interrupt.h>
 #include <linux/kernel.h>
 #include <linux/platform_device.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_dp_helper.h>
 
diff --git a/drivers/gpu/drm/msm/edp/edp_bridge.c b/drivers/gpu/drm/msm/edp/edp_bridge.c
index 2950bba4aca98ebcc2700e521148610669af9733..b65b5cc2dba2d8a14d00ddf5863fd4ba15a28c92 100644
--- a/drivers/gpu/drm/msm/edp/edp_bridge.c
+++ b/drivers/gpu/drm/msm/edp/edp_bridge.c
@@ -55,8 +55,14 @@ static void edp_bridge_mode_set(struct drm_bridge *bridge,
 	DBG("set mode: " DRM_MODE_FMT, DRM_MODE_ARG(mode));
 
 	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
-		if ((connector->encoder != NULL) &&
-			(connector->encoder->bridge == bridge)) {
+		struct drm_encoder *encoder = connector->encoder;
+		struct drm_bridge *first_bridge;
+
+		if (!connector->encoder)
+			continue;
+
+		first_bridge = drm_bridge_chain_get_first_bridge(encoder);
+		if (bridge == first_bridge) {
 			msm_edp_ctrl_timing_cfg(edp->ctrl,
 				adjusted_mode, &connector->display_info);
 			break;
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.c b/drivers/gpu/drm/msm/hdmi/hdmi.c
index 74b806b3e65f4704ac6fb9c6d7bf800ab03b7e10..7f0afb58613ff84ffd7e8b86728950c19afdcae2 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi.c
@@ -345,7 +345,9 @@ int msm_hdmi_modeset_init(struct hdmi *hdmi,
 		goto fail;
 	}
 
-	encoder->bridge = hdmi->bridge;
+	ret = drm_bridge_attach(encoder, hdmi->bridge, NULL);
+	if (ret)
+		goto fail;
 
 	priv->bridges[priv->num_bridges++]       = hdmi->bridge;
 	priv->connectors[priv->num_connectors++] = hdmi->connector;
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.h b/drivers/gpu/drm/msm/hdmi/hdmi.h
index bdac452b00fb324ce661b47b731fc7872250e20b..d0b84f0abee17146deeed623cd3da8aad355d951 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi.h
+++ b/drivers/gpu/drm/msm/hdmi/hdmi.h
@@ -14,6 +14,8 @@
 #include <linux/gpio/consumer.h>
 #include <linux/hdmi.h>
 
+#include <drm/drm_bridge.h>
+
 #include "msm_drv.h"
 #include "hdmi.xml.h"
 
diff --git a/drivers/gpu/drm/omapdrm/dss/output.c b/drivers/gpu/drm/omapdrm/dss/output.c
index 14b41de44ebcda9a6c6ebda7de21817b22de2a90..0693d34fca1b9c89ea803137d5e5f25d581cd467 100644
--- a/drivers/gpu/drm/omapdrm/dss/output.c
+++ b/drivers/gpu/drm/omapdrm/dss/output.c
@@ -12,6 +12,7 @@
 #include <linux/of.h>
 #include <linux/of_graph.h>
 
+#include <drm/drm_bridge.h>
 #include <drm/drm_panel.h>
 
 #include "dss.h"
diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c
index a4645b78f737495751e95cc4decfc0f9810fb460..d2750f60f519249831e5a519d1f185873ac1bd94 100644
--- a/drivers/gpu/drm/omapdrm/omap_drv.c
+++ b/drivers/gpu/drm/omapdrm/omap_drv.c
@@ -11,6 +11,7 @@
 
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_drv.h>
 #include <drm/drm_fb_helper.h>
 #include <drm/drm_file.h>
diff --git a/drivers/gpu/drm/omapdrm/omap_encoder.c b/drivers/gpu/drm/omapdrm/omap_encoder.c
index b626b543a992343e1ec5872209d4d22e275a7d99..4f2165a37795f717810ffdb8660bdef65e2284ba 100644
--- a/drivers/gpu/drm/omapdrm/omap_encoder.c
+++ b/drivers/gpu/drm/omapdrm/omap_encoder.c
@@ -6,6 +6,7 @@
 
 #include <linux/list.h>
 
+#include <drm/drm_bridge.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_modeset_helper_vtables.h>
 #include <drm/drm_edid.h>
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
index 2da46e3dc4ae8c7d70de8bb2071edf853fd0df67..f2ae4c4102440968634f797e42445c2be3796d60 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
@@ -14,6 +14,7 @@
 
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_device.h>
 #include <drm/drm_fb_cma_helper.h>
@@ -680,9 +681,10 @@ static void rcar_du_crtc_atomic_enable(struct drm_crtc *crtc,
 			rcdu->encoders[RCAR_DU_OUTPUT_LVDS0 + rcrtc->index];
 		const struct drm_display_mode *mode =
 			&crtc->state->adjusted_mode;
+		struct drm_bridge *bridge;
 
-		rcar_lvds_clk_enable(encoder->base.bridge,
-				     mode->clock * 1000);
+		bridge = drm_bridge_chain_get_first_bridge(&encoder->base);
+		rcar_lvds_clk_enable(bridge, mode->clock * 1000);
 	}
 
 	rcar_du_crtc_start(rcrtc);
@@ -702,12 +704,14 @@ static void rcar_du_crtc_atomic_disable(struct drm_crtc *crtc,
 	    rstate->outputs == BIT(RCAR_DU_OUTPUT_DPAD0)) {
 		struct rcar_du_encoder *encoder =
 			rcdu->encoders[RCAR_DU_OUTPUT_LVDS0 + rcrtc->index];
+		struct drm_bridge *bridge;
 
 		/*
 		 * Disable the LVDS clock output, see
 		 * rcar_du_crtc_atomic_enable().
 		 */
-		rcar_lvds_clk_disable(encoder->base.bridge);
+		bridge = drm_bridge_chain_get_first_bridge(&encoder->base);
+		rcar_lvds_clk_disable(bridge);
 	}
 
 	spin_lock_irq(&crtc->dev->event_lock);
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_encoder.c b/drivers/gpu/drm/rcar-du/rcar_du_encoder.c
index 0f00bdfe2366a5a0cb689fe9741f4447334e3f8f..3a1139b725c04e15a7d2dd5246b835e3a64162f9 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_encoder.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_encoder.c
@@ -9,6 +9,7 @@
 
 #include <linux/export.h>
 
+#include <drm/drm_bridge.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_modeset_helper_vtables.h>
 #include <drm/drm_panel.h>
diff --git a/drivers/gpu/drm/rockchip/rockchip_lvds.c b/drivers/gpu/drm/rockchip/rockchip_lvds.c
index 64aefa856896376a10ce8ad51023e78bc79df4a0..8a4c9af0ba73c08b24fd55fc3eb1779f15384990 100644
--- a/drivers/gpu/drm/rockchip/rockchip_lvds.c
+++ b/drivers/gpu/drm/rockchip/rockchip_lvds.c
@@ -16,6 +16,7 @@
 #include <linux/regmap.h>
 #include <linux/reset.h>
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 
 #include <drm/drm_dp_helper.h>
 #include <drm/drm_of.h>
diff --git a/drivers/gpu/drm/rockchip/rockchip_rgb.c b/drivers/gpu/drm/rockchip/rockchip_rgb.c
index 89e0bb0fe0ab942ceb78db41ad3659f07615d1f8..db1be1f3925c736f7537721e25174a72b2956ea7 100644
--- a/drivers/gpu/drm/rockchip/rockchip_rgb.c
+++ b/drivers/gpu/drm/rockchip/rockchip_rgb.c
@@ -9,6 +9,7 @@
 #include <linux/of_graph.h>
 
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_dp_helper.h>
 #include <drm/drm_of.h>
 #include <drm/drm_panel.h>
diff --git a/drivers/gpu/drm/sti/sti_dvo.c b/drivers/gpu/drm/sti/sti_dvo.c
index d0f1384d0fbaa478960a7780ccc5150897eda715..54d0fc6d417941fff95539897fd0741ef3bfa6ae 100644
--- a/drivers/gpu/drm/sti/sti_dvo.c
+++ b/drivers/gpu/drm/sti/sti_dvo.c
@@ -12,6 +12,7 @@
 #include <linux/platform_device.h>
 
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_device.h>
 #include <drm/drm_panel.h>
 #include <drm/drm_print.h>
diff --git a/drivers/gpu/drm/sti/sti_hda.c b/drivers/gpu/drm/sti/sti_hda.c
index b321e55257711e5225fd8957f926344c511b544d..64d7d42d8119be1452b11a8dca666cd7e8c7ef49 100644
--- a/drivers/gpu/drm/sti/sti_hda.c
+++ b/drivers/gpu/drm/sti/sti_hda.c
@@ -12,6 +12,7 @@
 #include <linux/seq_file.h>
 
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_debugfs.h>
 #include <drm/drm_device.h>
 #include <drm/drm_file.h>
diff --git a/drivers/gpu/drm/sti/sti_hdmi.c b/drivers/gpu/drm/sti/sti_hdmi.c
index c5547fedebe30335ffa4f2123887f0b8d60186bb..b4bc0cc930992be82de1db653494e5050d7100fe 100644
--- a/drivers/gpu/drm/sti/sti_hdmi.c
+++ b/drivers/gpu/drm/sti/sti_hdmi.c
@@ -14,6 +14,7 @@
 #include <linux/reset.h>
 
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_debugfs.h>
 #include <drm/drm_drv.h>
 #include <drm/drm_edid.h>
diff --git a/drivers/gpu/drm/sun4i/sun4i_lvds.c b/drivers/gpu/drm/sun4i/sun4i_lvds.c
index 7fbf425acb55004424231d4d2dd2b69c500e9fba..25ab2ef6d5454fb427fb9439ddffdcca35a672c2 100644
--- a/drivers/gpu/drm/sun4i/sun4i_lvds.c
+++ b/drivers/gpu/drm/sun4i/sun4i_lvds.c
@@ -7,6 +7,7 @@
 #include <linux/clk.h>
 
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_of.h>
 #include <drm/drm_panel.h>
 #include <drm/drm_print.h>
diff --git a/drivers/gpu/drm/sun4i/sun4i_rgb.c b/drivers/gpu/drm/sun4i/sun4i_rgb.c
index aac56983f2081ee450f08ccf86e58abbecbb09e4..e74b9eddca0133973457f4de80dc9cbf0c8db4c2 100644
--- a/drivers/gpu/drm/sun4i/sun4i_rgb.c
+++ b/drivers/gpu/drm/sun4i/sun4i_rgb.c
@@ -9,6 +9,7 @@
 #include <linux/clk.h>
 
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_of.h>
 #include <drm/drm_panel.h>
 #include <drm/drm_print.h>
diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c
index eb3b2350687fb6d13fe174d52e0f51a58737a7ff..a7866fb806901c1a6d7f1abc756861eca992d461 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tcon.c
+++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c
@@ -16,6 +16,7 @@
 #include <linux/reset.h>
 
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_connector.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_encoder.h>
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_external.c b/drivers/gpu/drm/tilcdc/tilcdc_external.c
index 67e23317c7dedebbcb92e8659f9878fa1d1d70ad..3d14a95f3c726b158abb5427123fe50f3908f75b 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_external.c
+++ b/drivers/gpu/drm/tilcdc/tilcdc_external.c
@@ -8,6 +8,7 @@
 #include <linux/of_graph.h>
 
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_of.h>
 
 #include "tilcdc_drv.h"
diff --git a/drivers/gpu/drm/vc4/vc4_dsi.c b/drivers/gpu/drm/vc4/vc4_dsi.c
index 67bfbffdb65c43c1ddcc60d7521f46de794585ba..6f4f97d51999a77b95612b5a9170e87e72e6ca14 100644
--- a/drivers/gpu/drm/vc4/vc4_dsi.c
+++ b/drivers/gpu/drm/vc4/vc4_dsi.c
@@ -31,6 +31,7 @@
 #include <linux/pm_runtime.h>
 
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_edid.h>
 #include <drm/drm_mipi_dsi.h>
 #include <drm/drm_of.h>
@@ -498,6 +499,7 @@ struct vc4_dsi {
 	struct mipi_dsi_host dsi_host;
 	struct drm_encoder *encoder;
 	struct drm_bridge *bridge;
+	struct list_head bridge_chain;
 
 	void __iomem *regs;
 
@@ -1457,6 +1459,8 @@ static int vc4_dsi_bind(struct device *dev, struct device *master, void *data)
 				       GFP_KERNEL);
 	if (!vc4_dsi_encoder)
 		return -ENOMEM;
+
+	INIT_LIST_HEAD(&dsi->bridge_chain);
 	vc4_dsi_encoder->base.type = VC4_ENCODER_TYPE_DSI1;
 	vc4_dsi_encoder->dsi = dsi;
 	dsi->encoder = &vc4_dsi_encoder->base.base;
@@ -1607,7 +1611,7 @@ static int vc4_dsi_bind(struct device *dev, struct device *master, void *data)
 	 * from our driver, since we need to sequence them within the
 	 * encoder's enable/disable paths.
 	 */
-	dsi->encoder->bridge = NULL;
+	list_splice(&dsi->encoder->bridge_chain, &dsi->bridge_chain);
 
 	if (dsi->port == 0)
 		vc4_debugfs_add_regset32(drm, "dsi0_regs", &dsi->regset);
@@ -1629,6 +1633,11 @@ static void vc4_dsi_unbind(struct device *dev, struct device *master,
 	if (dsi->bridge)
 		pm_runtime_disable(dev);
 
+	/*
+	 * Restore the bridge_chain so the bridge detach procedure can happen
+	 * normally.
+	 */
+	list_splice(&dsi->bridge_chain, &dsi->encoder->bridge_chain);
 	vc4_dsi_encoder_destroy(dsi->encoder);
 
 	if (dsi->port == 1)
diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h
index 9f7192366cfbe2ca9771fcfbc8e6a6df824731d5..d2075909a8c88f874deece08af23817b27b2ff5b 100644
--- a/include/drm/drm_bridge.h
+++ b/include/drm/drm_bridge.h
@@ -25,6 +25,7 @@
 
 #include <linux/list.h>
 #include <linux/ctype.h>
+#include <drm/drm_encoder.h>
 #include <drm/drm_mode_object.h>
 #include <drm/drm_modes.h>
 
@@ -383,8 +384,8 @@ struct drm_bridge {
 	struct drm_device *dev;
 	/** @encoder: encoder to which this bridge is connected */
 	struct drm_encoder *encoder;
-	/** @next: the next bridge in the encoder chain */
-	struct drm_bridge *next;
+	/** @chain_node: used to form a bridge chain */
+	struct list_head chain_node;
 #ifdef CONFIG_OF
 	/** @of_node: device node pointer to the bridge */
 	struct device_node *of_node;
@@ -419,7 +420,25 @@ int drm_bridge_attach(struct drm_encoder *encoder, struct drm_bridge *bridge,
 static inline struct drm_bridge *
 drm_bridge_get_next_bridge(struct drm_bridge *bridge)
 {
-	return bridge->next;
+	if (list_is_last(&bridge->chain_node, &bridge->encoder->bridge_chain))
+		return NULL;
+
+	return list_next_entry(bridge, chain_node);
+}
+
+/**
+ * drm_bridge_chain_get_first_bridge() - Get the first bridge in the chain
+ * @encoder: encoder object
+ *
+ * RETURNS:
+ * the first bridge in the chain, or NULL if @encoder has no bridge attached
+ * to it.
+ */
+static inline struct drm_bridge *
+drm_bridge_chain_get_first_bridge(struct drm_encoder *encoder)
+{
+	return list_first_entry_or_null(&encoder->bridge_chain,
+					struct drm_bridge, chain_node);
 }
 
 bool drm_bridge_chain_mode_fixup(struct drm_bridge *bridge,
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index ebcce95f9da63efa4cfb2e3cc15c378243fa58e0..6bef2f41d4d70a928b35a01ccec46b93b8c6a4d1 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -41,7 +41,6 @@
 #include <drm/drm_connector.h>
 #include <drm/drm_device.h>
 #include <drm/drm_property.h>
-#include <drm/drm_bridge.h>
 #include <drm/drm_edid.h>
 #include <drm/drm_plane.h>
 #include <drm/drm_blend.h>
diff --git a/include/drm/drm_device.h b/include/drm/drm_device.h
index 1acfc3bbd3fb2e29c3fe3f2139076b09152708ff..4449b7c6d76177d2e48d91fefd718e242c21a9de 100644
--- a/include/drm/drm_device.h
+++ b/include/drm/drm_device.h
@@ -67,6 +67,21 @@ struct drm_device {
 	/** @dev: Device structure of bus-device */
 	struct device *dev;
 
+	/**
+	 * @managed:
+	 *
+	 * Managed resources linked to the lifetime of this &drm_device as
+	 * tracked by @ref.
+	 */
+	struct {
+		/** @managed.resources: managed resources list */
+		struct list_head resources;
+		/** @managed.final_kfree: pointer for final kfree() call */
+		void *final_kfree;
+		/** @managed.lock: protects @managed.resources */
+		spinlock_t lock;
+	} managed;
+
 	/** @driver: DRM driver managing the device */
 	struct drm_driver *driver;
 
diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
index 8364502f92cfe4545ea94cef2e9568b3afbd06e7..25a682acbb01caf318c30550ae2f85d4357bbad2 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -1350,6 +1350,9 @@ static inline ssize_t drm_dp_dpcd_writeb(struct drm_dp_aux *aux,
 	return drm_dp_dpcd_write(aux, offset, &value, 1);
 }
 
+int drm_dp_read_dpcd_caps(struct drm_dp_aux *aux,
+			  u8 dpcd[DP_RECEIVER_CAP_SIZE]);
+
 int drm_dp_dpcd_read_link_status(struct drm_dp_aux *aux,
 				 u8 status[DP_LINK_STATUS_SIZE]);
 
diff --git a/include/drm/drm_encoder.h b/include/drm/drm_encoder.h
index 70cfca03d812e4a751fdbe122f632d06235d0b36..ba26e66235e78bb8ebbbe0c0a688a65b5ee37f44 100644
--- a/include/drm/drm_encoder.h
+++ b/include/drm/drm_encoder.h
@@ -89,8 +89,7 @@ struct drm_encoder_funcs {
  * @head: list management
  * @base: base KMS object
  * @name: human readable name, can be overwritten by the driver
- * @bridge: bridge associated to the encoder
- * @funcs: control functions
+ * @funcs: control functions, can be NULL for simple managed encoders
  * @helper_private: mid-layer private data
  *
  * CRTCs drive pixels to encoders, which convert them into signals
@@ -172,7 +171,12 @@ struct drm_encoder {
 	 * &drm_connector_state.crtc.
 	 */
 	struct drm_crtc *crtc;
-	struct drm_bridge *bridge;
+
+	/**
+	 * @bridge_chain: Bridges attached to this encoder.
+	 */
+	struct list_head bridge_chain;
+
 	const struct drm_encoder_funcs *funcs;
 	const struct drm_encoder_helper_funcs *helper_private;
 };
@@ -185,6 +189,42 @@ int drm_encoder_init(struct drm_device *dev,
 		     const struct drm_encoder_funcs *funcs,
 		     int encoder_type, const char *name, ...);
 
+__printf(5, 6)
+int drmm_encoder_init(struct drm_device *dev,
+		      struct drm_encoder *encoder,
+		      const struct drm_encoder_funcs *funcs,
+		      int encoder_type, const char *name, ...);
+
+__printf(6, 7)
+void *__drmm_encoder_alloc(struct drm_device *dev,
+			   size_t size, size_t offset,
+			   const struct drm_encoder_funcs *funcs,
+			   int encoder_type,
+			   const char *name, ...);
+
+/**
+ * drmm_encoder_alloc - Allocate and initialize an encoder
+ * @dev: drm device
+ * @type: the type of the struct which contains struct &drm_encoder
+ * @member: the name of the &drm_encoder within @type
+ * @funcs: callbacks for this encoder (optional)
+ * @encoder_type: user visible type of the encoder
+ * @name: printf style format string for the encoder name, or NULL for default name
+ *
+ * Allocates and initializes an encoder. Encoder should be subclassed as part of
+ * driver encoder objects. Cleanup is automatically handled through registering
+ * drm_encoder_cleanup() with drmm_add_action().
+ *
+ * The @drm_encoder_funcs.destroy hook must be NULL.
+ *
+ * Returns:
+ * Pointer to new encoder, or ERR_PTR on failure.
+ */
+#define drmm_encoder_alloc(dev, type, member, funcs, encoder_type, name, ...) \
+	((type *)__drmm_encoder_alloc(dev, sizeof(type), \
+				      offsetof(type, member), funcs, \
+				      encoder_type, name, ##__VA_ARGS__))
+
 /**
  * drm_encoder_index - find the index of a registered encoder
  * @encoder: encoder to find index for
diff --git a/include/drm/drm_managed.h b/include/drm/drm_managed.h
new file mode 100644
index 0000000000000000000000000000000000000000..a3b1186e603361969708b929cdfd79de3daab921
--- /dev/null
+++ b/include/drm/drm_managed.h
@@ -0,0 +1,37 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#ifndef _DRM_MANAGED_H_
+#define _DRM_MANAGED_H_
+
+#include <linux/gfp.h>
+#include <linux/types.h>
+
+struct drm_device;
+
+typedef void (*drmres_release_t)(struct drm_device *dev, void *res);
+
+#define drmm_add_action(dev, action, data) \
+	__drmm_add_action(dev, action, data, #action)
+
+int __must_check __drmm_add_action(struct drm_device *dev,
+				   drmres_release_t action,
+				   void *data, const char *name);
+
+#define drmm_add_action_or_reset(dev, action, data) \
+	__drmm_add_action_or_reset(dev, action, data, #action)
+
+int __must_check __drmm_add_action_or_reset(struct drm_device *dev,
+					    drmres_release_t action,
+					    void *data, const char *name);
+
+void drmm_add_final_kfree(struct drm_device *dev, void *container);
+
+void *drmm_kmalloc(struct drm_device *dev, size_t size, gfp_t gfp) __malloc;
+static inline void *drmm_kzalloc(struct drm_device *dev, size_t size, gfp_t gfp)
+{
+	return drmm_kmalloc(dev, size, gfp | __GFP_ZERO);
+}
+
+void drmm_kfree(struct drm_device *dev, void *data);
+
+#endif
diff --git a/include/drm/drm_print.h b/include/drm/drm_print.h
index a5d6f2f3e430fa85df646eaf1fcfa0a4fccfdd03..4b4107872901c744eb8e8cc1a6527636627e3e2b 100644
--- a/include/drm/drm_print.h
+++ b/include/drm/drm_print.h
@@ -271,6 +271,7 @@ static inline struct drm_printer drm_debug_printer(const char *prefix)
 #define DRM_UT_STATE		0x40
 #define DRM_UT_LEASE		0x80
 #define DRM_UT_DP		0x100
+#define DRM_UT_DRMRES		0x200
 
 __printf(3, 4)
 void drm_dev_printk(const struct device *dev, const char *level,
@@ -352,6 +353,10 @@ void drm_err(const char *format, ...);
  */
 #define DRM_DEV_DEBUG(dev, fmt, ...)					\
 	drm_dev_dbg(dev, DRM_UT_CORE, fmt, ##__VA_ARGS__)
+#define drm_dbg_dp(drm, fmt, ...)					\
+	drm_dev_dbg((drm)->dev, DRM_UT_DP, fmt, ##__VA_ARGS__)
+#define drm_dbg_drmres(drm, fmt, ...)					\
+	drm_dev_dbg((drm)->dev, DRM_UT_DRMRES, fmt, ##__VA_ARGS__)
 #define DRM_DEBUG(fmt, ...)						\
 	drm_dbg(DRM_UT_CORE, fmt, ##__VA_ARGS__)
 
@@ -427,4 +432,33 @@ void drm_err(const char *format, ...);
 #define DRM_DEBUG_PRIME_RATELIMITED(fmt, ...)				\
 	DRM_DEV_DEBUG_PRIME_RATELIMITED(NULL, fmt, ##__VA_ARGS__)
 
+/*
+ * struct drm_device based WARNs
+ *
+ * drm_WARN*() acts like WARN*(), but with the key difference of
+ * using device specific information so that we know from which device
+ * warning is originating from.
+ *
+ * Prefer drm_device based drm_WARN* over regular WARN*
+ */
+
+/* Helper for struct drm_device based WARNs */
+#define drm_WARN(drm, condition, format, arg...)			\
+	WARN(condition, "%s %s: " format,				\
+			dev_driver_string((drm)->dev),			\
+			dev_name((drm)->dev), ## arg)
+
+#define drm_WARN_ONCE(drm, condition, format, arg...)			\
+	WARN_ONCE(condition, "%s %s: " format,				\
+			dev_driver_string((drm)->dev),			\
+			dev_name((drm)->dev), ## arg)
+
+#define drm_WARN_ON(drm, x)						\
+	drm_WARN((drm), (x), "%s",					\
+		 "drm_WARN_ON(" __stringify(x) ")")
+
+#define drm_WARN_ON_ONCE(drm, x)					\
+	drm_WARN_ONCE((drm), (x), "%s",					\
+		      "drm_WARN_ON_ONCE(" __stringify(x) ")")
+
 #endif /* DRM_PRINT_H_ */
diff --git a/mm/slub.c b/mm/slub.c
index 1919254586a55d5b219c3f3b52c103e9931bc5bd..424a9b4e1d21f0363e099bc5f0c62e4282a15d01 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -4506,6 +4506,7 @@ void *__kmalloc_node_track_caller(size_t size, gfp_t gfpflags,
 
 	return ret;
 }
+EXPORT_SYMBOL(__kmalloc_node_track_caller);
 #endif
 
 #ifdef CONFIG_SYSFS