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From:   Mark Yacoub <markyacoub@chromium.org>
To:     quic_khsieh@quicinc.com, linux-arm-msm@vger.kernel.org,
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        quic_jesszhan@quicinc.com, bjorn.andersson@linaro.org,
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Subject: [PATCH v6 10/10] drm/msm: Implement HDCP 1.x using the new drm HDCP helpers
Date:   Wed, 18 Jan 2023 19:30:15 +0000
Message-Id: <20230118193015.911074-11-markyacoub@google.com>
In-Reply-To: <20230118193015.911074-1-markyacoub@google.com>
References: <20230118193015.911074-1-markyacoub@google.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

From: Sean Paul <seanpaul@chromium.org>

This patch adds HDCP 1.x support to msm DP connectors using the new HDCP
helpers.

Cc: Stephen Boyd <swboyd@chromium.org>
Cc: Abhinav Kumar <abhinavk@codeaurora.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Mark Yacoub <markyacoub@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210913175747.47456-15-sean@poorly.run #v1
Link: https://patchwork.freedesktop.org/patch/msgid/20210915203834.1439-14-sean@poorly.run #v2
Link: https://patchwork.freedesktop.org/patch/msgid/20211001151145.55916-15-sean@poorly.run #v3
Link: https://patchwork.freedesktop.org/patch/msgid/20211105030434.2828845-15-sean@poorly.run #v4
Link: https://patchwork.freedesktop.org/patch/msgid/20220411204741.1074308-11-sean@poorly.run #v5

Changes in v2:
-Squash [1] into this patch with the following changes (Stephen)
  -Update the sc7180 dtsi file
  -Remove resource names and just use index (Stephen)
Changes in v3:
-Split out the dtsi change from v2 (Stephen)
-Fix set-but-unused warning identified by 0-day
-Fix up a couple of style nits (Stephen)
-Store HDCP key directly in dp_hdcp struct (Stephen)
-Remove wmb in HDCP key initialization, move an_seed (Stephen)
-Use FIELD_PREP for bstatus/bcaps (Stephen)
-#define read_poll_timeout values (Stephen)
-Remove unnecessary parentheses in dp_hdcp_store_ksv_fifo (Stephen)
-Add compatible string for hdcp (Stephen)
-Rename dp_hdcp_write_* functions (Abhinav)
-Add 1us delay between An reads (Abhinav)
-Delete unused dp_hdcp_read_* functions
Changes in v4:
-Rebase on Bjorn's multi-dp patchset
Changes in v5:
-Change return check of drm_hdcp_helper_initialize_dp() (Stephen)
Changes in v6:
-Change the tracking of the state from connector state to bridge as
state as drm_connector_state is no longer tracked and the functionality
has moved to msm_dp_bridge

[1] https://patchwork.freedesktop.org/patch/msgid/20210913175747.47456-14-sean@poorly.run

---
 drivers/gpu/drm/msm/Kconfig         |   1 +
 drivers/gpu/drm/msm/Makefile        |   1 +
 drivers/gpu/drm/msm/dp/dp_debug.c   |  48 ++-
 drivers/gpu/drm/msm/dp/dp_debug.h   |   6 +-
 drivers/gpu/drm/msm/dp/dp_display.c |  52 +++-
 drivers/gpu/drm/msm/dp/dp_display.h |   5 +
 drivers/gpu/drm/msm/dp/dp_drm.c     | 108 ++++++-
 drivers/gpu/drm/msm/dp/dp_drm.h     |  16 +-
 drivers/gpu/drm/msm/dp/dp_hdcp.c    | 456 ++++++++++++++++++++++++++++
 drivers/gpu/drm/msm/dp/dp_hdcp.h    |  29 ++
 drivers/gpu/drm/msm/dp/dp_parser.c  |  20 +-
 drivers/gpu/drm/msm/dp/dp_parser.h  |   4 +
 drivers/gpu/drm/msm/dp/dp_reg.h     |  32 +-
 drivers/gpu/drm/msm/msm_atomic.c    |  15 +
 14 files changed, 772 insertions(+), 21 deletions(-)
 create mode 100644 drivers/gpu/drm/msm/dp/dp_hdcp.c
 create mode 100644 drivers/gpu/drm/msm/dp/dp_hdcp.h

diff --git a/drivers/gpu/drm/msm/Kconfig b/drivers/gpu/drm/msm/Kconfig
index 61ca0c0757bc..9d9a66d9156c 100644
--- a/drivers/gpu/drm/msm/Kconfig
+++ b/drivers/gpu/drm/msm/Kconfig
@@ -15,6 +15,7 @@ config DRM_MSM
 	select REGULATOR
 	select DRM_DP_AUX_BUS
 	select DRM_DISPLAY_DP_HELPER
+	select DRM_DISPLAY_HDCP_HELPER
 	select DRM_DISPLAY_HELPER
 	select DRM_KMS_HELPER
 	select DRM_PANEL
diff --git a/drivers/gpu/drm/msm/Makefile b/drivers/gpu/drm/msm/Makefile
index 7274c41228ed..a73e7b858af2 100644
--- a/drivers/gpu/drm/msm/Makefile
+++ b/drivers/gpu/drm/msm/Makefile
@@ -122,6 +122,7 @@ msm-$(CONFIG_DRM_MSM_DP)+= dp/dp_aux.o \
 	dp/dp_ctrl.o \
 	dp/dp_display.o \
 	dp/dp_drm.o \
+	dp/dp_hdcp.o \
 	dp/dp_hpd.o \
 	dp/dp_link.o \
 	dp/dp_panel.o \
diff --git a/drivers/gpu/drm/msm/dp/dp_debug.c b/drivers/gpu/drm/msm/dp/dp_debug.c
index 5e35033ba3e4..e97d27edbb13 100644
--- a/drivers/gpu/drm/msm/dp/dp_debug.c
+++ b/drivers/gpu/drm/msm/dp/dp_debug.c
@@ -8,6 +8,7 @@
 #include <linux/debugfs.h>
 #include <drm/drm_connector.h>
 #include <drm/drm_file.h>
+#include <drm/display/drm_hdcp_helper.h>
 
 #include "dp_parser.h"
 #include "dp_catalog.h"
@@ -15,6 +16,7 @@
 #include "dp_ctrl.h"
 #include "dp_debug.h"
 #include "dp_display.h"
+#include "dp_hdcp.h"
 
 #define DEBUG_NAME "msm_dp"
 
@@ -25,6 +27,7 @@ struct dp_debug_private {
 	struct dp_link *link;
 	struct dp_panel *panel;
 	struct drm_connector *connector;
+	struct dp_hdcp *hdcp;
 	struct device *dev;
 	struct drm_device *drm_dev;
 
@@ -196,6 +199,35 @@ static int dp_test_active_open(struct inode *inode,
 			inode->i_private);
 }
 
+static ssize_t dp_hdcp_key_write(struct file *file, const char __user *ubuf,
+				 size_t len, loff_t *offp)
+{
+	char *input_buffer;
+	int ret;
+	struct dp_debug_private *debug = file->private_data;
+
+	if (len != (DRM_HDCP_KSV_LEN + DP_HDCP_NUM_KEYS * DP_HDCP_KEY_LEN))
+		return -EINVAL;
+
+	if (!debug->hdcp)
+		return -ENOENT;
+
+	input_buffer = memdup_user_nul(ubuf, len);
+	if (IS_ERR(input_buffer))
+		return PTR_ERR(input_buffer);
+
+	ret = dp_hdcp_ingest_key(debug->hdcp, input_buffer, len);
+
+	kfree(input_buffer);
+	if (ret < 0) {
+		DRM_ERROR("Could not ingest HDCP key, ret=%d\n", ret);
+		return ret;
+	}
+
+	*offp += len;
+	return len;
+}
+
 static const struct file_operations test_active_fops = {
 	.owner = THIS_MODULE,
 	.open = dp_test_active_open,
@@ -205,6 +237,12 @@ static const struct file_operations test_active_fops = {
 	.write = dp_test_active_write
 };
 
+static const struct file_operations dp_hdcp_key_fops = {
+	.owner = THIS_MODULE,
+	.open = simple_open,
+	.write = dp_hdcp_key_write,
+};
+
 static void dp_debug_init(struct dp_debug *dp_debug, struct drm_minor *minor)
 {
 	char path[64];
@@ -229,11 +267,16 @@ static void dp_debug_init(struct dp_debug *dp_debug, struct drm_minor *minor)
 	debugfs_create_file("msm_dp_test_type", 0444,
 			debug->root,
 			debug, &dp_test_type_fops);
+
+	debugfs_create_file("msm_dp_hdcp_key", 0222, minor->debugfs_root, debug,
+			    &dp_hdcp_key_fops);
 }
 
 struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel,
-		struct dp_usbpd *usbpd, struct dp_link *link,
-		struct drm_connector *connector, struct drm_minor *minor)
+			      struct dp_usbpd *usbpd, struct dp_link *link,
+			      struct dp_hdcp *hdcp,
+			      struct drm_connector *connector,
+			      struct drm_minor *minor)
 {
 	struct dp_debug_private *debug;
 	struct dp_debug *dp_debug;
@@ -255,6 +298,7 @@ struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel,
 	debug->usbpd = usbpd;
 	debug->link = link;
 	debug->panel = panel;
+	debug->hdcp = hdcp;
 	debug->dev = dev;
 	debug->drm_dev = minor->dev;
 	debug->connector = connector;
diff --git a/drivers/gpu/drm/msm/dp/dp_debug.h b/drivers/gpu/drm/msm/dp/dp_debug.h
index 8c0d0b5178fd..55ab008876e7 100644
--- a/drivers/gpu/drm/msm/dp/dp_debug.h
+++ b/drivers/gpu/drm/msm/dp/dp_debug.h
@@ -6,6 +6,7 @@
 #ifndef _DP_DEBUG_H_
 #define _DP_DEBUG_H_
 
+#include "dp_hdcp.h"
 #include "dp_panel.h"
 #include "dp_link.h"
 
@@ -43,7 +44,7 @@ struct dp_debug {
  */
 struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel,
 		struct dp_usbpd *usbpd, struct dp_link *link,
-		struct drm_connector *connector,
+		struct dp_hdcp *hdcp, struct drm_connector *connector,
 		struct drm_minor *minor);
 
 /**
@@ -60,7 +61,8 @@ void dp_debug_put(struct dp_debug *dp_debug);
 static inline
 struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel,
 		struct dp_usbpd *usbpd, struct dp_link *link,
-		struct drm_connector *connector, struct drm_minor *minor)
+		struct dp_hdcp *hdcp, struct drm_connector *connector,
+		struct drm_minor *minor)
 {
 	return ERR_PTR(-EINVAL);
 }
diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index a49f6dbbe888..33e82d97b714 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -27,6 +27,7 @@
 #include "dp_drm.h"
 #include "dp_audio.h"
 #include "dp_debug.h"
+#include "dp_hdcp.h"
 
 #define HPD_STRING_SIZE 30
 
@@ -97,6 +98,7 @@ struct dp_display_private {
 	struct dp_panel   *panel;
 	struct dp_ctrl    *ctrl;
 	struct dp_debug   *debug;
+	struct dp_hdcp    *hdcp;
 
 	struct dp_usbpd_cb usbpd_cb;
 	struct dp_display_mode dp_mode;
@@ -187,6 +189,20 @@ static struct dp_display_private *dev_get_dp_display_private(struct device *dev)
 	return container_of(dp, struct dp_display_private, dp_display);
 }
 
+struct dp_hdcp *dp_display_connector_to_hdcp(struct drm_connector *connector)
+{
+	struct dp_display_private *dp;
+
+	struct msm_dp *dp_display =
+		msm_bridge_from_connector(connector)->dp_display;
+	if (!dp_display)
+		return NULL;
+
+	dp = container_of(dp_display, struct dp_display_private, dp_display);
+
+	return dp->hdcp;
+}
+
 static int dp_add_event(struct dp_display_private *dp_priv, u32 event,
 						u32 data, u32 delay)
 {
@@ -740,6 +756,7 @@ static int dp_irq_hpd_handle(struct dp_display_private *dp, u32 data)
 static void dp_display_deinit_sub_modules(struct dp_display_private *dp)
 {
 	dp_debug_put(dp->debug);
+	dp_hdcp_put(dp->hdcp);
 	dp_audio_put(dp->audio);
 	dp_panel_put(dp->panel);
 	dp_aux_put(dp->aux);
@@ -840,8 +857,18 @@ static int dp_init_sub_modules(struct dp_display_private *dp)
 	dp->ctrl->wide_bus_en = dp->wide_bus_en;
 	dp->catalog->wide_bus_en = dp->wide_bus_en;
 
+	dp->hdcp = dp_hdcp_get(dp->parser, dp->aux);
+	if (IS_ERR(dp->hdcp)) {
+		rc = PTR_ERR(dp->hdcp);
+		DRM_ERROR("failed to initialize hdcp, rc = %d\n", rc);
+		dp->hdcp = NULL;
+		goto error_hdcp;
+	}
+
 	return rc;
 
+error_hdcp:
+	dp_audio_put(dp->audio);
 error_ctrl:
 	dp_panel_put(dp->panel);
 error_link:
@@ -953,6 +980,16 @@ int dp_display_set_plugged_cb(struct msm_dp *dp_display,
 	return 0;
 }
 
+void dp_display_hdcp_commit(struct msm_dp *dp, struct drm_atomic_state *state)
+{
+	struct dp_display_private *dp_display;
+
+	dp_display = container_of(dp, struct dp_display_private, dp_display);
+
+	if (dp_display->hdcp)
+		dp_hdcp_commit(dp_display->hdcp, state);
+}
+
 /**
  * dp_bridge_mode_valid - callback to determine if specified mode is valid
  * @bridge: Pointer to drm bridge structure
@@ -1518,9 +1555,8 @@ void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor)
 	dp = container_of(dp_display, struct dp_display_private, dp_display);
 	dev = &dp->pdev->dev;
 
-	dp->debug = dp_debug_get(dev, dp->panel, dp->usbpd,
-					dp->link, dp->dp_display.connector,
-					minor);
+	dp->debug = dp_debug_get(dev, dp->panel, dp->usbpd, dp->link, dp->hdcp,
+				 dp->dp_display.connector, minor);
 	if (IS_ERR(dp->debug)) {
 		rc = PTR_ERR(dp->debug);
 		DRM_ERROR("failed to initialize debug, rc = %d\n", rc);
@@ -1600,6 +1636,7 @@ static int dp_display_get_next_bridge(struct msm_dp *dp)
 int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev,
 			struct drm_encoder *encoder)
 {
+	struct dp_display_private *dp_display_priv;
 	struct msm_drm_private *priv;
 	struct dp_display_private *dp_priv;
 	int ret;
@@ -1607,6 +1644,9 @@ int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev,
 	if (WARN_ON(!encoder) || WARN_ON(!dp_display) || WARN_ON(!dev))
 		return -EINVAL;
 
+	dp_display_priv =
+		container_of(dp_display, struct dp_display_private, dp_display);
+
 	priv = dev->dev_private;
 
 	if (priv->num_bridges == ARRAY_SIZE(priv->bridges)) {
@@ -1650,6 +1690,12 @@ int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev,
 
 	dp_priv->panel->connector = dp_display->connector;
 
+	ret = dp_hdcp_attach(dp_display_priv->hdcp, dp_display->connector);
+	if (ret) {
+		DRM_ERROR("Failed to attach hdcp, ret=%d\n", ret);
+		return ret;
+	}
+
 	return 0;
 }
 
diff --git a/drivers/gpu/drm/msm/dp/dp_display.h b/drivers/gpu/drm/msm/dp/dp_display.h
index dcedf021f7fe..5d0bb1cacced 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.h
+++ b/drivers/gpu/drm/msm/dp/dp_display.h
@@ -30,8 +30,13 @@ struct msm_dp {
 	struct dp_audio *dp_audio;
 };
 
+struct drm_atomic_state;
+
 int dp_display_set_plugged_cb(struct msm_dp *dp_display,
 		hdmi_codec_plugged_cb fn, struct device *codec_dev);
+struct dp_hdcp *dp_display_connector_to_hdcp(struct drm_connector *connector);
+void dp_display_hdcp_commit(struct msm_dp *dp_display,
+			    struct drm_atomic_state *state);
 int dp_display_get_modes(struct msm_dp *dp_display);
 int dp_display_request_irq(struct msm_dp *dp_display);
 bool dp_display_check_video_test(struct msm_dp *dp_display);
diff --git a/drivers/gpu/drm/msm/dp/dp_drm.c b/drivers/gpu/drm/msm/dp/dp_drm.c
index 6db82f9b03af..6cb98d4ad2d7 100644
--- a/drivers/gpu/drm/msm/dp/dp_drm.c
+++ b/drivers/gpu/drm/msm/dp/dp_drm.c
@@ -3,15 +3,20 @@
  * Copyright (c) 2017-2020, The Linux Foundation. All rights reserved.
  */
 
+#include "drm/drm_connector.h"
+#include "linux/slab.h"
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_atomic.h>
 #include <drm/drm_bridge.h>
 #include <drm/drm_bridge_connector.h>
+#include <drm/drm_bridge_connector.h>
 #include <drm/drm_crtc.h>
+#include <drm/display/drm_hdcp_helper.h>
 
 #include "msm_drv.h"
 #include "msm_kms.h"
 #include "dp_drm.h"
+#include "dp_hdcp.h"
 
 /**
  * dp_bridge_detect - callback to determine if connector is connected
@@ -37,6 +42,7 @@ static int dp_bridge_atomic_check(struct drm_bridge *bridge,
 			    struct drm_connector_state *conn_state)
 {
 	struct msm_dp *dp;
+	struct dp_bridge_state *dp_bridge_state;
 
 	dp = to_dp_bridge(bridge)->dp_display;
 
@@ -54,8 +60,15 @@ static int dp_bridge_atomic_check(struct drm_bridge *bridge,
 	 * disabled by the hardware and thus all access to it should be forbidden.
 	 * After that this piece of code can be removed.
 	 */
-	if (bridge->ops & DRM_BRIDGE_OP_HPD)
-		return (dp->is_connected) ? 0 : -ENOTCONN;
+	if (bridge->ops & DRM_BRIDGE_OP_HPD && !dp->is_connected)
+		return -ENOTCONN;
+
+	dp_bridge_state = to_dp_bridge_state(bridge_state);
+	if (!dp_bridge_state)
+		return 0;
+
+	dp_bridge_state->hdcp_transition =
+		drm_hdcp_atomic_check(conn_state->connector, conn_state->state);
 
 	return 0;
 }
@@ -90,20 +103,93 @@ static int dp_bridge_get_modes(struct drm_bridge *bridge, struct drm_connector *
 	return rc;
 }
 
+static struct drm_bridge_state *
+dp_atomic_helper_bridge_duplicate_state(struct drm_bridge *bridge)
+{
+	struct dp_bridge_state *dp_bridge_state;
+
+	if (WARN_ON(!bridge->base.state))
+		return NULL;
+
+	dp_bridge_state = kzalloc(sizeof(*dp_bridge_state), GFP_KERNEL);
+	if (!dp_bridge_state)
+		return NULL;
+
+	dp_bridge_state->hdcp_transition = false;
+	to_dp_bridge(bridge)->state = dp_bridge_state;
+
+	__drm_atomic_helper_bridge_duplicate_state(bridge,
+						   &dp_bridge_state->base);
+	return &dp_bridge_state->base;
+}
+
 static const struct drm_bridge_funcs dp_bridge_ops = {
-	.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
-	.atomic_destroy_state   = drm_atomic_helper_bridge_destroy_state,
-	.atomic_reset           = drm_atomic_helper_bridge_reset,
-	.enable       = dp_bridge_enable,
-	.disable      = dp_bridge_disable,
+	.atomic_duplicate_state = dp_atomic_helper_bridge_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+	.atomic_reset = drm_atomic_helper_bridge_reset,
+	.enable = dp_bridge_enable,
+	.disable = dp_bridge_disable,
 	.post_disable = dp_bridge_post_disable,
-	.mode_set     = dp_bridge_mode_set,
-	.mode_valid   = dp_bridge_mode_valid,
-	.get_modes    = dp_bridge_get_modes,
-	.detect       = dp_bridge_detect,
+	.mode_set = dp_bridge_mode_set,
+	.mode_valid = dp_bridge_mode_valid,
+	.get_modes = dp_bridge_get_modes,
+	.detect = dp_bridge_detect,
 	.atomic_check = dp_bridge_atomic_check,
 };
 
+struct msm_dp_bridge *msm_bridge_from_connector(struct drm_connector *connector)
+{
+	struct msm_drm_private *priv = connector->dev->dev_private;
+	int i = 0;
+	if (!priv)
+		return NULL;
+
+	for (i = 0; i < priv->num_bridges; i++) {
+		struct msm_dp *dp;
+		struct drm_connector *bridge_connector;
+		struct drm_bridge *bridge = priv->bridges[i];
+		if (!bridge)
+			continue;
+
+		dp = to_dp_bridge(bridge)->dp_display;
+		if (!dp)
+			continue;
+
+		bridge_connector = dp->connector;
+		if (bridge_connector == connector)
+			return to_dp_bridge(bridge);
+	}
+
+	return NULL;
+}
+
+bool dp_drm_is_connector_msm_dp(struct drm_connector *connector)
+{
+	struct msm_dp_bridge *dp_bridge = msm_bridge_from_connector(connector);
+	if (!dp_bridge)
+		return false;
+
+	if (dp_bridge->bridge.funcs == &dp_bridge_ops)
+		return true;
+
+	return false;
+}
+
+void dp_drm_atomic_commit(struct drm_connector *connector,
+			  struct drm_connector_state *conn_state,
+			  struct drm_atomic_state *state)
+{
+	struct msm_dp_bridge *bridge = msm_bridge_from_connector(connector);
+	if (!bridge)
+		return;
+
+	if (!bridge->state || !bridge->state->hdcp_transition)
+		return;
+
+	if (bridge->dp_display)
+		dp_display_hdcp_commit(bridge->dp_display, state);
+}
+
 struct drm_bridge *dp_bridge_init(struct msm_dp *dp_display, struct drm_device *dev,
 			struct drm_encoder *encoder)
 {
diff --git a/drivers/gpu/drm/msm/dp/dp_drm.h b/drivers/gpu/drm/msm/dp/dp_drm.h
index 82035dbb0578..d97dcc0f9458 100644
--- a/drivers/gpu/drm/msm/dp/dp_drm.h
+++ b/drivers/gpu/drm/msm/dp/dp_drm.h
@@ -8,21 +8,35 @@
 
 #include <linux/types.h>
 #include <drm/drm_bridge.h>
+#include <drm/display/drm_hdcp_helper.h>
 
 #include "msm_drv.h"
 #include "dp_display.h"
 
+struct dp_bridge_state {
+	struct drm_bridge_state base;
+	bool hdcp_transition;
+};
+#define to_dp_bridge_state(x) container_of(x, struct dp_bridge_state, base)
+
 struct msm_dp_bridge {
 	struct drm_bridge bridge;
+	struct dp_bridge_state *state;
 	struct msm_dp *dp_display;
 };
-
 #define to_dp_bridge(x)     container_of((x), struct msm_dp_bridge, bridge)
 
 struct drm_connector *dp_drm_connector_init(struct msm_dp *dp_display, struct drm_encoder *encoder);
 struct drm_bridge *dp_bridge_init(struct msm_dp *dp_display, struct drm_device *dev,
 			struct drm_encoder *encoder);
 
+bool dp_drm_is_connector_msm_dp(struct drm_connector *connector);
+struct msm_dp_bridge *
+msm_bridge_from_connector(struct drm_connector *connector);
+void dp_drm_atomic_commit(struct drm_connector *connector,
+			  struct drm_connector_state *conn_state,
+			  struct drm_atomic_state *state);
+
 void dp_bridge_enable(struct drm_bridge *drm_bridge);
 void dp_bridge_disable(struct drm_bridge *drm_bridge);
 void dp_bridge_post_disable(struct drm_bridge *drm_bridge);
diff --git a/drivers/gpu/drm/msm/dp/dp_hdcp.c b/drivers/gpu/drm/msm/dp/dp_hdcp.c
new file mode 100644
index 000000000000..4408aa5eb607
--- /dev/null
+++ b/drivers/gpu/drm/msm/dp/dp_hdcp.c
@@ -0,0 +1,456 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright (C) 2021 Google, Inc.
+ *
+ * Authors:
+ * Sean Paul <seanpaul@chromium.org>
+ */
+
+#include "dp_display.h"
+#include "dp_drm.h"
+#include "dp_hdcp.h"
+#include "dp_reg.h"
+
+#include <drm/drm_connector.h>
+#include <drm/drm_device.h>
+#include <drm/display/drm_dp_helper.h>
+#include <drm/display/drm_hdcp_helper.h>
+#include <drm/drm_print.h>
+
+#include <linux/bitfield.h>
+#include <linux/bits.h>
+#include <linux/iopoll.h>
+#include <linux/mutex.h>
+#include <linux/random.h>
+#include <linux/slab.h>
+
+/* Offsets based on hdcp_ksv mmio */
+#define DP_HDCP_KSV_AN_LSB 0x0
+#define DP_HDCP_KSV_AN_MSB 0x4
+#define DP_HDCP_KSV_AKSV_MSB 0x1D8
+#define DP_HDCP_KSV_AKSV_LSB 0x1DC
+
+/* Key offsets based on hdcp_key mmio */
+#define DP_HDCP_KEY_BASE 0x30
+#define DP_HDCP_KEY_MSB(x) (DP_HDCP_KEY_BASE + (x * 8))
+#define DP_HDCP_KEY_LSB(x) (DP_HDCP_KEY_MSB(x) + 4)
+#define DP_HDCP_KEY_VALID 0x170
+#define DP_HDCP_SW_KEY_VALID BIT(0)
+
+/* Timeouts */
+#define DP_KEYS_VALID_SLEEP_US (20 * 1000)
+#define DP_KEYS_VALID_TIMEOUT_US (100 * 1000)
+#define DP_AN_READY_SLEEP_US 100
+#define DP_AN_READY_TIMEOUT_US (10 * 1000)
+#define DP_R0_READY_SLEEP_US 100
+#define DP_R0_READY_TIMEOUT_US (10 * 1000)
+#define DP_RI_MATCH_SLEEP_US (20 * 1000)
+#define DP_RI_MATCH_TIMEOUT_US (100 * 1000)
+#define DP_KSV_WRITTEN_SLEEP_US 100
+#define DP_KSV_WRITTEN_TIMEOUT_US (100 * 1000)
+#define DP_SHA_COMPUTATION_SLEEP_US 100
+#define DP_SHA_COMPUTATION_TIMEOUT_US (100 * 1000)
+#define DP_AN_READ_DELAY_US 1
+
+/*
+ * dp_hdcp_key - structure which contains an HDCP key set
+ * @ksv: The key selection vector
+ * @keys: Contains 40 keys
+ */
+struct dp_hdcp_key {
+	struct drm_hdcp_ksv ksv;
+	union {
+		u32 words[2];
+		u8 bytes[DP_HDCP_KEY_LEN];
+	} keys[DP_HDCP_NUM_KEYS];
+	bool valid;
+};
+
+struct dp_hdcp {
+	struct drm_device *dev;
+	struct drm_connector *connector;
+
+	struct drm_dp_aux *aux;
+	struct dp_parser *parser;
+
+	struct drm_hdcp_helper_data *helper_data;
+
+	struct mutex key_lock;
+	struct dp_hdcp_key key;
+};
+
+static inline void dp_hdcp_write_ahb(struct dp_hdcp *hdcp, u32 offset, u32 val)
+{
+	writel(val, hdcp->parser->io.dp_controller.ahb.base + offset);
+}
+
+static inline u32 dp_hdcp_read_ahb(struct dp_hdcp *hdcp, u32 offset)
+{
+	return readl(hdcp->parser->io.dp_controller.ahb.base + offset);
+}
+
+static inline void dp_hdcp_write_aux(struct dp_hdcp *hdcp, u32 offset, u32 val)
+{
+	writel(val, hdcp->parser->io.dp_controller.aux.base + offset);
+}
+
+static inline u32 dp_hdcp_read_aux(struct dp_hdcp *hdcp, u32 offset)
+{
+	return readl(hdcp->parser->io.dp_controller.aux.base + offset);
+}
+
+static inline void dp_hdcp_write_link(struct dp_hdcp *hdcp, u32 offset, u32 val)
+{
+	writel(val, hdcp->parser->io.dp_controller.link.base + offset);
+}
+
+static inline u32 dp_hdcp_read_link(struct dp_hdcp *hdcp, u32 offset)
+{
+	return readl(hdcp->parser->io.dp_controller.link.base + offset);
+}
+
+static inline void dp_hdcp_write_key(struct dp_hdcp *hdcp, u32 offset, u32 val)
+{
+	writel(val, hdcp->parser->io.dp_controller.hdcp_key.base + offset);
+}
+
+static inline void dp_hdcp_write_tz_hlos(struct dp_hdcp *hdcp, u32 offset,
+					 u32 val)
+{
+	writel(val, hdcp->parser->io.dp_controller.hdcp_tz.base + offset);
+}
+
+int dp_hdcp_ingest_key(struct dp_hdcp *hdcp, const u8 *raw_key, int raw_len)
+{
+	unsigned int ksv_weight;
+	int i, ret = 0;
+
+	if (raw_len !=
+	    (DRM_HDCP_KSV_LEN + DP_HDCP_NUM_KEYS * DP_HDCP_KEY_LEN)) {
+		DRM_ERROR(
+			"Invalid HDCP key length expected=%d actual=%d\n",
+			(DRM_HDCP_KSV_LEN + DP_HDCP_NUM_KEYS * DP_HDCP_KEY_LEN),
+			raw_len);
+		return -EINVAL;
+	}
+
+	mutex_lock(&hdcp->key_lock);
+
+	memcpy(hdcp->key.ksv.bytes, raw_key, DRM_HDCP_KSV_LEN);
+	ksv_weight = hweight32(hdcp->key.ksv.words[0]) +
+		     hweight32(hdcp->key.ksv.words[1]);
+	if (ksv_weight != 20) {
+		DRM_ERROR("Invalid ksv weight, expected=20 actual=%d\n",
+			  ksv_weight);
+		ret = -EINVAL;
+		goto out;
+	}
+
+	raw_key += DRM_HDCP_KSV_LEN;
+	for (i = 0; i < DP_HDCP_NUM_KEYS; i++) {
+		memcpy(hdcp->key.keys[i].bytes, raw_key, DP_HDCP_KEY_LEN);
+		raw_key += DP_HDCP_KEY_LEN;
+	}
+
+	DRM_DEBUG_DRIVER("Successfully ingested HDCP key\n");
+	hdcp->key.valid = true;
+
+out:
+	mutex_unlock(&hdcp->key_lock);
+	return ret;
+}
+
+static bool dp_hdcp_are_keys_valid(struct drm_connector *connector)
+{
+	struct dp_hdcp *hdcp = dp_display_connector_to_hdcp(connector);
+	u32 val;
+
+	val = dp_hdcp_read_ahb(hdcp, DP_HDCP_STATUS);
+	return FIELD_GET(DP_HDCP_KEY_STATUS, val) == DP_HDCP_KEY_STATUS_VALID;
+}
+
+static int dp_hdcp_load_keys(struct drm_connector *connector)
+{
+	struct dp_hdcp *hdcp = dp_display_connector_to_hdcp(connector);
+	int i, ret = 0;
+	u64 an_seed = get_random_u64();
+
+	mutex_lock(&hdcp->key_lock);
+
+	if (!hdcp->key.valid) {
+		ret = -ENOENT;
+		goto out;
+	}
+
+	dp_hdcp_write_aux(hdcp, DP_HDCP_SW_LOWER_AKSV, hdcp->key.ksv.words[0]);
+	dp_hdcp_write_aux(hdcp, DP_HDCP_SW_UPPER_AKSV, hdcp->key.ksv.words[1]);
+
+	for (i = 0; i < DP_HDCP_NUM_KEYS; i++) {
+		dp_hdcp_write_key(hdcp, DP_HDCP_KEY_LSB(i),
+				  hdcp->key.keys[i].words[0]);
+		dp_hdcp_write_key(hdcp, DP_HDCP_KEY_MSB(i),
+				  hdcp->key.keys[i].words[1]);
+	}
+
+	dp_hdcp_write_key(hdcp, DP_HDCP_KEY_VALID, DP_HDCP_SW_KEY_VALID);
+
+	dp_hdcp_write_link(hdcp, DP_HDCP_ENTROPY_CTRL0,
+			   FIELD_GET(GENMASK(31, 0), an_seed));
+	dp_hdcp_write_link(hdcp, DP_HDCP_ENTROPY_CTRL1,
+			   FIELD_GET(GENMASK_ULL(63, 32), an_seed));
+
+out:
+	mutex_unlock(&hdcp->key_lock);
+	return ret;
+}
+
+static int dp_hdcp_hdcp2_capable(struct drm_connector *connector, bool *capable)
+{
+	*capable = false;
+	return 0;
+}
+
+static int dp_hdcp_hdcp1_read_an_aksv(struct drm_connector *connector, u32 *an,
+				      u32 *aksv)
+{
+	struct dp_hdcp *hdcp = dp_display_connector_to_hdcp(connector);
+	bool keys_valid;
+	int ret;
+	u32 val;
+
+	dp_hdcp_write_ahb(hdcp, DP_HDCP_CTRL, 1);
+
+	ret = read_poll_timeout(dp_hdcp_are_keys_valid, keys_valid, keys_valid,
+				DP_KEYS_VALID_SLEEP_US,
+				DP_KEYS_VALID_TIMEOUT_US, false, connector);
+	if (ret) {
+		drm_err(hdcp->dev, "HDCP keys invalid %d\n", ret);
+		return ret;
+	}
+
+	/* Clear AInfo */
+	dp_hdcp_write_aux(hdcp, DP_HDCP_RCVPORT_DATA4, 0);
+
+	aksv[0] = dp_hdcp_read_aux(hdcp, DP_HDCP_RCVPORT_DATA3);
+	aksv[1] = GENMASK(7, 0) & dp_hdcp_read_aux(hdcp, DP_HDCP_RCVPORT_DATA4);
+
+	ret = read_poll_timeout(dp_hdcp_read_ahb, val,
+				(val & DP_HDCP_AN_READY_MASK) ==
+					DP_HDCP_AN_READY_MASK,
+				DP_AN_READY_SLEEP_US, DP_AN_READY_TIMEOUT_US,
+				false, hdcp, DP_HDCP_STATUS);
+	if (ret) {
+		drm_err(hdcp->dev, "AN failed to become ready %x/%d\n", val,
+			ret);
+		return ret;
+	}
+
+	/*
+	 * Get An from hardware, for unknown reasons we need to read the reg
+	 * twice to get valid data.
+	 */
+	dp_hdcp_read_ahb(hdcp, DP_HDCP_RCVPORT_DATA5);
+	an[0] = dp_hdcp_read_ahb(hdcp, DP_HDCP_RCVPORT_DATA5);
+
+	udelay(DP_AN_READ_DELAY_US);
+
+	dp_hdcp_read_ahb(hdcp, DP_HDCP_RCVPORT_DATA6);
+	an[1] = dp_hdcp_read_ahb(hdcp, DP_HDCP_RCVPORT_DATA6);
+
+	return 0;
+}
+
+static int dp_hdcp_hdcp1_store_receiver_info(struct drm_connector *connector,
+					     u32 *ksv, u32 status, u8 bcaps,
+					     bool is_repeater)
+{
+	struct dp_hdcp *hdcp = dp_display_connector_to_hdcp(connector);
+	u32 val;
+
+	dp_hdcp_write_tz_hlos(hdcp, HDCP_SEC_DP_TZ_HV_HLOS_HDCP_RCVPORT_DATA0,
+			      ksv[0]);
+	dp_hdcp_write_tz_hlos(hdcp, HDCP_SEC_DP_TZ_HV_HLOS_HDCP_RCVPORT_DATA1,
+			      ksv[1]);
+
+	val = FIELD_PREP(GENMASK(23, 8), status) |
+	      FIELD_PREP(GENMASK(7, 0), bcaps);
+
+	dp_hdcp_write_tz_hlos(hdcp, HDCP_SEC_DP_TZ_HV_HLOS_HDCP_RCVPORT_DATA12,
+			      val);
+
+	return 0;
+}
+
+static int dp_hdcp_hdcp1_enable_encryption(struct drm_connector *connector)
+{
+	return 0;
+}
+
+static int dp_hdcp_hdcp1_wait_for_r0(struct drm_connector *connector)
+{
+	struct dp_hdcp *hdcp = dp_display_connector_to_hdcp(connector);
+	int ret;
+	u32 val;
+
+	ret = read_poll_timeout(dp_hdcp_read_ahb, val, (val & DP_HDCP_R0_READY),
+				DP_R0_READY_SLEEP_US, DP_R0_READY_TIMEOUT_US,
+				false, hdcp, DP_HDCP_STATUS);
+	if (ret) {
+		drm_err(hdcp->dev, "HDCP R0 not ready %x/%d\n", val, ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int dp_hdcp_hdcp1_match_ri(struct drm_connector *connector, u32 ri_prime)
+{
+	struct dp_hdcp *hdcp = dp_display_connector_to_hdcp(connector);
+	int ret;
+	u32 val;
+
+	dp_hdcp_write_ahb(hdcp, DP_HDCP_RCVPORT_DATA2_0, ri_prime);
+
+	ret = read_poll_timeout(dp_hdcp_read_ahb, val, (val & DP_HDCP_RI_MATCH),
+				DP_RI_MATCH_SLEEP_US, DP_RI_MATCH_TIMEOUT_US,
+				false, hdcp, DP_HDCP_STATUS);
+	if (ret) {
+		drm_err(hdcp->dev,
+			"Failed to match Ri and Ri` (%08x) %08x/%d\n", ri_prime,
+			val, ret);
+		return ret;
+	}
+	return 0;
+}
+
+static int dp_hdcp_hdcp1_store_ksv_fifo(struct drm_connector *connector,
+					u8 *ksv_fifo, u8 num_downstream,
+					u8 *bstatus, u32 *vprime)
+{
+	struct dp_hdcp *hdcp = dp_display_connector_to_hdcp(connector);
+	int num_bytes = num_downstream * DRM_HDCP_KSV_LEN;
+	int ret, i;
+	u32 val;
+
+	/* Reset the SHA computation block */
+	dp_hdcp_write_tz_hlos(hdcp, HDCP_SEC_DP_TZ_HV_HLOS_HDCP_SHA_CTRL,
+			      DP_HDCP_SHA_CTRL_RESET);
+	dp_hdcp_write_tz_hlos(hdcp, HDCP_SEC_DP_TZ_HV_HLOS_HDCP_SHA_CTRL, 0);
+
+	/*
+	 * KSV info gets written a byte at a time in the same order it was
+	 * received. Every 64 bytes, we need to wait for the SHA_BLOCK_DONE
+	 * bit to be set in SHA_CTRL.
+	 */
+	for (i = 0; i < num_bytes; i++) {
+		val = FIELD_PREP(DP_HDCP_SHA_DATA_MASK, ksv_fifo[i]);
+
+		if (i == (num_bytes - 1))
+			val |= DP_HDCP_SHA_DATA_DONE;
+
+		dp_hdcp_write_tz_hlos(
+			hdcp, HDCP_SEC_DP_TZ_HV_HLOS_HDCP_SHA_DATA, val);
+
+		if (((i + 1) % 64) != 0)
+			continue;
+
+		ret = read_poll_timeout(dp_hdcp_read_ahb, val,
+					(val & DP_HDCP_SHA_DONE),
+					DP_KSV_WRITTEN_SLEEP_US,
+					DP_KSV_WRITTEN_TIMEOUT_US, false, hdcp,
+					DP_HDCP_SHA_STATUS);
+		if (ret) {
+			drm_err(hdcp->dev, "SHA block incomplete %d\n", ret);
+			return ret;
+		}
+	}
+
+	ret = read_poll_timeout(dp_hdcp_read_ahb, val,
+				(val & DP_HDCP_SHA_COMP_DONE),
+				DP_SHA_COMPUTATION_SLEEP_US,
+				DP_SHA_COMPUTATION_TIMEOUT_US, false, hdcp,
+				DP_HDCP_SHA_STATUS);
+	if (ret) {
+		drm_err(hdcp->dev, "SHA computation incomplete %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int dp_hdcp_hdcp1_disable(struct drm_connector *connector)
+{
+	struct dp_hdcp *hdcp = dp_display_connector_to_hdcp(connector);
+	u32 val;
+
+	val = dp_hdcp_read_ahb(hdcp, REG_DP_SW_RESET);
+	dp_hdcp_write_ahb(hdcp, REG_DP_SW_RESET, val | DP_HDCP_SW_RESET);
+
+	/* Disable encryption and disable the HDCP block */
+	dp_hdcp_write_ahb(hdcp, DP_HDCP_CTRL, 0);
+
+	dp_hdcp_write_ahb(hdcp, REG_DP_SW_RESET, val);
+
+	return 0;
+}
+
+void dp_hdcp_commit(struct dp_hdcp *hdcp, struct drm_atomic_state *state)
+{
+	drm_hdcp_helper_atomic_commit(hdcp->helper_data, state, NULL);
+}
+
+static const struct drm_hdcp_helper_funcs dp_hdcp_funcs = {
+	.are_keys_valid = dp_hdcp_are_keys_valid,
+	.load_keys = dp_hdcp_load_keys,
+	.hdcp2_capable = dp_hdcp_hdcp2_capable,
+	.hdcp1_read_an_aksv = dp_hdcp_hdcp1_read_an_aksv,
+	.hdcp1_store_receiver_info = dp_hdcp_hdcp1_store_receiver_info,
+	.hdcp1_enable_encryption = dp_hdcp_hdcp1_enable_encryption,
+	.hdcp1_wait_for_r0 = dp_hdcp_hdcp1_wait_for_r0,
+	.hdcp1_match_ri = dp_hdcp_hdcp1_match_ri,
+	.hdcp1_store_ksv_fifo = dp_hdcp_hdcp1_store_ksv_fifo,
+	.hdcp1_disable = dp_hdcp_hdcp1_disable,
+};
+
+int dp_hdcp_attach(struct dp_hdcp *hdcp, struct drm_connector *connector)
+{
+	struct drm_hdcp_helper_data *helper_data;
+
+	/* HDCP is not configured for this device */
+	if (!hdcp->parser->io.dp_controller.hdcp_key.base)
+		return 0;
+
+	helper_data = drm_hdcp_helper_initialize_dp(connector, hdcp->aux,
+						    &dp_hdcp_funcs, false);
+	if (IS_ERR(helper_data))
+		return PTR_ERR(helper_data);
+
+	hdcp->dev = connector->dev;
+	hdcp->connector = connector;
+	hdcp->helper_data = helper_data;
+
+	return 0;
+}
+
+struct dp_hdcp *dp_hdcp_get(struct dp_parser *parser, struct drm_dp_aux *aux)
+{
+	struct device *dev = &parser->pdev->dev;
+	struct dp_hdcp *hdcp;
+
+	hdcp = devm_kzalloc(dev, sizeof(*hdcp), GFP_KERNEL);
+	if (!hdcp)
+		return ERR_PTR(-ENOMEM);
+
+	hdcp->parser = parser;
+	hdcp->aux = aux;
+
+	mutex_init(&hdcp->key_lock);
+
+	return hdcp;
+}
+
+void dp_hdcp_put(struct dp_hdcp *hdcp)
+{
+	if (hdcp)
+		drm_hdcp_helper_destroy(hdcp->helper_data);
+}
diff --git a/drivers/gpu/drm/msm/dp/dp_hdcp.h b/drivers/gpu/drm/msm/dp/dp_hdcp.h
new file mode 100644
index 000000000000..399b43250e55
--- /dev/null
+++ b/drivers/gpu/drm/msm/dp/dp_hdcp.h
@@ -0,0 +1,29 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright (C) 2021 Google, Inc.
+ *
+ * Authors:
+ * Sean Paul <seanpaul@chromium.org>
+ */
+
+#ifndef DP_HDCP_H_
+#define DP_HDCP_H_
+
+#include <drm/display/drm_hdcp_helper.h>
+
+#define DP_HDCP_KEY_LEN 7
+#define DP_HDCP_NUM_KEYS 40
+
+struct dp_hdcp;
+struct dp_parser;
+struct drm_atomic_state;
+struct drm_dp_aux;
+
+struct dp_hdcp *dp_hdcp_get(struct dp_parser *parser, struct drm_dp_aux *aux);
+void dp_hdcp_put(struct dp_hdcp *hdcp);
+
+int dp_hdcp_attach(struct dp_hdcp *hdcp, struct drm_connector *connector);
+int dp_hdcp_ingest_key(struct dp_hdcp *hdcp, const u8 *raw_key, int raw_len);
+void dp_hdcp_commit(struct dp_hdcp *hdcp, struct drm_atomic_state *state);
+
+#endif
diff --git a/drivers/gpu/drm/msm/dp/dp_parser.c b/drivers/gpu/drm/msm/dp/dp_parser.c
index dcbe893d66d7..714b8dcbc563 100644
--- a/drivers/gpu/drm/msm/dp/dp_parser.c
+++ b/drivers/gpu/drm/msm/dp/dp_parser.c
@@ -58,7 +58,6 @@ static int dp_parser_ctrl_res(struct dp_parser *parser)
 				DRM_ERROR("legacy memory region not large enough\n");
 				return -EINVAL;
 			}
-
 			dss->ahb.len = DP_DEFAULT_AHB_SIZE;
 			dss->aux.base = dss->ahb.base + DP_DEFAULT_AUX_OFFSET;
 			dss->aux.len = DP_DEFAULT_AUX_SIZE;
@@ -66,6 +65,10 @@ static int dp_parser_ctrl_res(struct dp_parser *parser)
 			dss->link.len = DP_DEFAULT_LINK_SIZE;
 			dss->p0.base = dss->ahb.base + DP_DEFAULT_P0_OFFSET;
 			dss->p0.len = DP_DEFAULT_P0_SIZE;
+			dss->hdcp_key.base = NULL;
+			dss->hdcp_key.len = 0;
+			dss->hdcp_tz.base = NULL;
+			dss->hdcp_tz.len = 0;
 		} else {
 			DRM_ERROR("unable to remap aux region: %pe\n", dss->aux.base);
 			return PTR_ERR(dss->aux.base);
@@ -82,6 +85,21 @@ static int dp_parser_ctrl_res(struct dp_parser *parser)
 			DRM_ERROR("unable to remap p0 region: %pe\n", dss->p0.base);
 			return PTR_ERR(dss->p0.base);
 		}
+
+		dss->hdcp_key.base = dp_ioremap(pdev, 5, &dss->hdcp_key.len);
+		if (!IS_ERR(dss->hdcp_key.base)) {
+			dss->hdcp_tz.base = dp_ioremap(pdev, 6, &dss->hdcp_tz.len);
+			if (IS_ERR(dss->hdcp_tz.base)) {
+				DRM_ERROR("unable to remap hdcp_tz region: %pe\n",
+					dss->hdcp_tz.base);
+				return PTR_ERR(dss->hdcp_tz.base);
+			}
+		} else {
+			dss->hdcp_key.base = NULL;
+			dss->hdcp_key.len = 0;
+			dss->hdcp_tz.base = NULL;
+			dss->hdcp_tz.len = 0;
+		}
 	}
 
 	io->phy = devm_phy_get(&pdev->dev, "dp");
diff --git a/drivers/gpu/drm/msm/dp/dp_parser.h b/drivers/gpu/drm/msm/dp/dp_parser.h
index d30ab773db46..b15e481d9d3b 100644
--- a/drivers/gpu/drm/msm/dp/dp_parser.h
+++ b/drivers/gpu/drm/msm/dp/dp_parser.h
@@ -34,6 +34,8 @@ struct dss_io_data {
 	struct dss_io_region aux;
 	struct dss_io_region link;
 	struct dss_io_region p0;
+	struct dss_io_region hdcp_key;
+	struct dss_io_region hdcp_tz;
 };
 
 static inline const char *dp_parser_pm_name(enum dp_pm_type module)
@@ -68,6 +70,8 @@ struct dp_display_data {
  * struct dp_ctrl_resource - controller's IO related data
  *
  * @dp_controller: Display Port controller mapped memory address
+ * @hdcp_key: mapped memory for HDCP key ingestion
+ * @hdcp_tz: mapped memory for HDCP TZ interaction
  * @phy_io: phy's mapped memory address
  */
 struct dp_io {
diff --git a/drivers/gpu/drm/msm/dp/dp_reg.h b/drivers/gpu/drm/msm/dp/dp_reg.h
index 268602803d9a..61ab70850f6b 100644
--- a/drivers/gpu/drm/msm/dp/dp_reg.h
+++ b/drivers/gpu/drm/msm/dp/dp_reg.h
@@ -6,11 +6,14 @@
 #ifndef _DP_REG_H_
 #define _DP_REG_H_
 
+#include <linux/bits.h>
+
 /* DP_TX Registers */
 #define REG_DP_HW_VERSION			(0x00000000)
 
 #define REG_DP_SW_RESET				(0x00000010)
-#define DP_SW_RESET				(0x00000001)
+#define  DP_SW_RESET				BIT(0)
+#define  DP_HDCP_SW_RESET			BIT(1)
 
 #define REG_DP_PHY_CTRL				(0x00000014)
 #define DP_PHY_CTRL_SW_RESET_PLL		(0x00000001)
@@ -283,19 +286,46 @@
 /* DP HDCP 1.3 registers */
 #define DP_HDCP_CTRL                                   (0x0A0)
 #define DP_HDCP_STATUS                                 (0x0A4)
+#define  DP_HDCP_KEY_STATUS			       GENMASK(18, 16)
+#define   DP_HDCP_KEY_STATUS_NO_KEYS		       0
+#define   DP_HDCP_KEY_STATUS_NOT_CHECKED	       1
+#define   DP_HDCP_KEY_STATUS_CHECKING		       2
+#define   DP_HDCP_KEY_STATUS_VALID		       3
+#define   DP_HDCP_KEY_STATUS_INVALID_AKSV	       4
+#define   DP_HDCP_KEY_STATUS_BAD_CHECKSUM	       5
+#define   DP_HDCP_KEY_STATUS_PROD_AKSV		       6
+#define   DP_HDCP_KEY_STATUS_RESV		       7
+#define  DP_HDCP_R0_READY			       BIT(14)
+#define  DP_HDCP_SHA_V_MATCH			       BIT(13)
+#define  DP_HDCP_RI_MATCH			       BIT(12)
+#define  DP_HDCP_AN_MSB_READY			       BIT(9)
+#define  DP_HDCP_AN_LSB_READY			       BIT(8)
+#define  DP_HDCP_AN_READY_MASK			       (DP_HDCP_AN_MSB_READY | DP_HDCP_AN_LSB_READY)
+#define  DP_HDCP_AUTH_FAIL_INFO			       GENMASK(7, 4)
+#define   DP_HDCP_AUTH_FAIL_INVALID_AKSV	       3
+#define   DP_HDCP_AUTH_FAIL_INVALID_BKSV	       4
+#define   DP_HDCP_AUTH_FAIL_RI_MISMATCH		       5
+#define  DP_HDCP_AUTH_FAIL			       BIT(2)
+#define  DP_HDCP_AUTH_SUCCESS			       BIT(0)
 #define DP_HDCP_SW_UPPER_AKSV                          (0x098)
 #define DP_HDCP_SW_LOWER_AKSV                          (0x09C)
 #define DP_HDCP_ENTROPY_CTRL0                          (0x350)
 #define DP_HDCP_ENTROPY_CTRL1                          (0x35C)
 #define DP_HDCP_SHA_STATUS                             (0x0C8)
+#define  DP_HDCP_SHA_COMP_DONE			       BIT(4)
+#define  DP_HDCP_SHA_DONE			       BIT(0)
 #define DP_HDCP_RCVPORT_DATA2_0                        (0x0B0)
 #define DP_HDCP_RCVPORT_DATA3                          (0x0A4)
 #define DP_HDCP_RCVPORT_DATA4                          (0x0A8)
 #define DP_HDCP_RCVPORT_DATA5                          (0x0C0)
 #define DP_HDCP_RCVPORT_DATA6                          (0x0C4)
+#define DP_HDCP_RCVPORT_DATA7                          (0x0C8)
 
 #define HDCP_SEC_DP_TZ_HV_HLOS_HDCP_SHA_CTRL           (0x024)
+#define  DP_HDCP_SHA_CTRL_RESET			       BIT(0)
 #define HDCP_SEC_DP_TZ_HV_HLOS_HDCP_SHA_DATA           (0x028)
+#define  DP_HDCP_SHA_DATA_MASK			       GENMASK(23, 16)
+#define  DP_HDCP_SHA_DATA_DONE			       BIT(0)
 #define HDCP_SEC_DP_TZ_HV_HLOS_HDCP_RCVPORT_DATA0      (0x004)
 #define HDCP_SEC_DP_TZ_HV_HLOS_HDCP_RCVPORT_DATA1      (0x008)
 #define HDCP_SEC_DP_TZ_HV_HLOS_HDCP_RCVPORT_DATA7      (0x00C)
diff --git a/drivers/gpu/drm/msm/msm_atomic.c b/drivers/gpu/drm/msm/msm_atomic.c
index 1686fbb611fd..7447f67fba65 100644
--- a/drivers/gpu/drm/msm/msm_atomic.c
+++ b/drivers/gpu/drm/msm/msm_atomic.c
@@ -7,6 +7,7 @@
 #include <drm/drm_atomic_uapi.h>
 #include <drm/drm_vblank.h>
 
+#include "dp_drm.h"
 #include "msm_atomic_trace.h"
 #include "msm_drv.h"
 #include "msm_gem.h"
@@ -179,6 +180,18 @@ static unsigned get_crtc_mask(struct drm_atomic_state *state)
 	return mask;
 }
 
+static void msm_atomic_commit_connectors(struct drm_atomic_state *state)
+{
+	struct drm_connector_state *conn_state;
+	struct drm_connector *connector;
+	int i;
+
+	for_each_new_connector_in_state(state, connector, conn_state, i) {
+		if (dp_drm_is_connector_msm_dp(connector))
+			dp_drm_atomic_commit(connector, conn_state, state);
+	}
+}
+
 void msm_atomic_commit_tail(struct drm_atomic_state *state)
 {
 	struct drm_device *dev = state->dev;
@@ -215,6 +228,8 @@ void msm_atomic_commit_tail(struct drm_atomic_state *state)
 	drm_atomic_helper_commit_planes(dev, state, 0);
 	drm_atomic_helper_commit_modeset_enables(dev, state);
 
+	msm_atomic_commit_connectors(state);
+
 	if (async) {
 		struct msm_pending_timer *timer =
 			&kms->pending_timers[drm_crtc_index(async_crtc)];
-- 
2.39.0.246.g2a6d74b583-goog