[PATCH v10 10/10] drm/msm: Implement HDCP 1.x using the new drm HDCP helpers

From: Mark Yacoub
Date: Wed Apr 19 2023 - 11:44:32 EST

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From: Sean Paul <seanpaul@xxxxxxxxxxxx>

Add HDCP 1.x support to msm DP bridges using the new HDCP
helpers.

Cc: Stephen Boyd <swboyd@xxxxxxxxxxxx>
Reviewed-by: Stephen Boyd <swboyd@xxxxxxxxxxxx>
Signed-off-by: Sean Paul <seanpaul@xxxxxxxxxxxx>
Signed-off-by: Mark Yacoub <markyacoub@xxxxxxxxxxxx>

---

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
Changes in v7:
-Use dp bridge to maintain the state with no use for connector
Changes in v8:
-Move the hdcp read/write to dp_catalog
Changes in v9:
-Remove display type specific helper funcs init from driver
Changes in v10:
-Fix #include to include directory (kernel test bot)

drivers/gpu/drm/msm/Kconfig | 1 +
drivers/gpu/drm/msm/Makefile | 1 +
drivers/gpu/drm/msm/dp/dp_catalog.c | 156 +++++++++++
drivers/gpu/drm/msm/dp/dp_catalog.h | 18 ++
drivers/gpu/drm/msm/dp/dp_debug.c | 46 +++-
drivers/gpu/drm/msm/dp/dp_debug.h | 11 +-
drivers/gpu/drm/msm/dp/dp_display.c | 39 ++-
drivers/gpu/drm/msm/dp/dp_display.h | 5 +
drivers/gpu/drm/msm/dp/dp_drm.c | 39 ++-
drivers/gpu/drm/msm/dp/dp_drm.h | 7 +
drivers/gpu/drm/msm/dp/dp_hdcp.c | 389 ++++++++++++++++++++++++++++
drivers/gpu/drm/msm/dp/dp_hdcp.h | 33 +++
drivers/gpu/drm/msm/dp/dp_parser.c | 14 +
drivers/gpu/drm/msm/dp/dp_parser.h | 4 +
drivers/gpu/drm/msm/dp/dp_reg.h | 30 ++-
drivers/gpu/drm/msm/msm_atomic.c | 19 ++
16 files changed, 800 insertions(+), 12 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 4d8fddbdcd9e0..1c369ca2ea6e3 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 7274c41228ed9..a73e7b858af27 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_catalog.c b/drivers/gpu/drm/msm/dp/dp_catalog.c
index 676279d0ca8d9..a1395e0c67d56 100644
--- a/drivers/gpu/drm/msm/dp/dp_catalog.c
+++ b/drivers/gpu/drm/msm/dp/dp_catalog.c
@@ -16,6 +16,8 @@
#include "dp_catalog.h"
#include "dp_reg.h"

+#include <linux/bitfield.h>
+
#define POLLING_SLEEP_US 1000
#define POLLING_TIMEOUT_US 10000

@@ -47,6 +49,14 @@
#define DP_INTERRUPT_STATUS2_MASK \
(DP_INTERRUPT_STATUS2 << DP_INTERRUPT_STATUS_MASK_SHIFT)

+#define DP_AN_READ_DELAY_US 1
+/* 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)
+
struct dp_catalog_private {
struct device *dev;
struct drm_device *drm_dev;
@@ -133,6 +143,18 @@ static inline void dp_write_link(struct dp_catalog_private *catalog,
writel(data, catalog->io->dp_controller.link.base + offset);
}

+static inline void dp_write_hdcp_key(struct dp_catalog_private *catalog,
+ u32 offset, u32 val)
+{
+ writel(val, catalog->io->dp_controller.hdcp_key.base + offset);
+}
+
+static inline void dp_write_hdcp_tz(struct dp_catalog_private *catalog,
+ u32 offset, u32 val)
+{
+ writel(val, catalog->io->dp_controller.hdcp_tz.base + offset);
+}
+
/* aux related catalog functions */
u32 dp_catalog_aux_read_data(struct dp_catalog *dp_catalog)
{
@@ -1094,3 +1116,137 @@ void dp_catalog_audio_sfe_level(struct dp_catalog *dp_catalog)

dp_write_link(catalog, REG_DP_MAINLINK_LEVELS, mainlink_levels);
}
+
+u32 dp_catalog_hdcp_read_ahb(struct dp_catalog *dp_catalog, u32 offset)
+{
+ struct dp_catalog_private *catalog =
+ container_of(dp_catalog, struct dp_catalog_private, dp_catalog);
+
+ return dp_read_ahb(catalog, offset);
+}
+
+void dp_catalog_hdcp_write_ahb(struct dp_catalog *dp_catalog, u32 offset,
+ u32 val)
+{
+ struct dp_catalog_private *catalog =
+ container_of(dp_catalog, struct dp_catalog_private, dp_catalog);
+
+ dp_write_ahb(catalog, offset, val);
+}
+
+void dp_catalog_hdcp_disable_hdcp1(struct dp_catalog *dp_catalog)
+{
+ struct dp_catalog_private *catalog =
+ container_of(dp_catalog, struct dp_catalog_private, dp_catalog);
+
+ u32 val = dp_read_ahb(catalog, REG_DP_SW_RESET);
+ dp_write_ahb(catalog, REG_DP_SW_RESET, val | DP_HDCP_SW_RESET);
+
+ /* Disable encryption and disable the HDCP block */
+ dp_write_ahb(catalog, DP_HDCP_CTRL, 0);
+ dp_write_ahb(catalog, REG_DP_SW_RESET, val);
+}
+
+void dp_catalog_hdcp_read_aksv(struct dp_catalog *dp_catalog, u32 *aksv)
+{
+ struct dp_catalog_private *catalog =
+ container_of(dp_catalog, struct dp_catalog_private, dp_catalog);
+
+ aksv[0] = dp_read_aux(catalog, DP_HDCP_RCVPORT_DATA3);
+ aksv[1] = GENMASK(7, 0) & dp_read_aux(catalog, DP_HDCP_RCVPORT_DATA4);
+}
+
+void dp_catalog_hdcp_write_aksv(struct dp_catalog *dp_catalog, u32 *aksv)
+{
+ struct dp_catalog_private *catalog =
+ container_of(dp_catalog, struct dp_catalog_private, dp_catalog);
+ dp_write_aux(catalog, DP_HDCP_SW_LOWER_AKSV, aksv[0]);
+ dp_write_aux(catalog, DP_HDCP_SW_UPPER_AKSV, aksv[1]);
+}
+
+void dp_catalog_hdcp_read_an(struct dp_catalog *dp_catalog, u32 *an)
+{
+ struct dp_catalog_private *catalog =
+ container_of(dp_catalog, struct dp_catalog_private, dp_catalog);
+ /*
+ * Get An from hardware, for unknown reasons we need to read the reg
+ * twice to get valid data.
+ */
+ dp_read_ahb(catalog, DP_HDCP_RCVPORT_DATA5);
+ an[0] = dp_read_ahb(catalog, DP_HDCP_RCVPORT_DATA5);
+
+ udelay(DP_AN_READ_DELAY_US);
+
+ dp_read_ahb(catalog, DP_HDCP_RCVPORT_DATA6);
+ an[1] = dp_read_ahb(catalog, DP_HDCP_RCVPORT_DATA6);
+}
+
+void dp_catalog_hdcp_clear_a_info(struct dp_catalog *dp_catalog)
+{
+ struct dp_catalog_private *catalog =
+ container_of(dp_catalog, struct dp_catalog_private, dp_catalog);
+ dp_write_ahb(catalog, DP_HDCP_RCVPORT_DATA4, 0);
+}
+
+void dp_catalog_hdcp_write_key_words(struct dp_catalog *dp_catalog,
+ int key_offset, u32 *words)
+{
+ struct dp_catalog_private *catalog =
+ container_of(dp_catalog, struct dp_catalog_private, dp_catalog);
+
+ dp_write_hdcp_key(catalog, DP_HDCP_KEY_LSB(key_offset), words[0]);
+ dp_write_hdcp_key(catalog, DP_HDCP_KEY_MSB(key_offset), words[1]);
+}
+
+void dp_catalog_hdcp_post_write_key(struct dp_catalog *dp_catalog)
+{
+ struct dp_catalog_private *catalog =
+ container_of(dp_catalog, struct dp_catalog_private, dp_catalog);
+ u64 an_seed = get_random_u64();
+
+ dp_write_hdcp_key(catalog, DP_HDCP_KEY_VALID, DP_HDCP_SW_KEY_VALID);
+
+ dp_write_link(catalog, DP_HDCP_ENTROPY_CTRL0,
+ FIELD_GET(GENMASK(31, 0), an_seed));
+ dp_write_link(catalog, DP_HDCP_ENTROPY_CTRL1,
+ FIELD_GET(GENMASK_ULL(63, 32), an_seed));
+}
+
+void dp_catalog_hdcp_hdcp1_store_receiver_info(struct dp_catalog *dp_catalog,
+ u32 *ksv, u32 status, u8 bcaps)
+{
+ struct dp_catalog_private *catalog =
+ container_of(dp_catalog, struct dp_catalog_private, dp_catalog);
+
+ u32 val;
+
+ dp_write_hdcp_tz(catalog, HDCP_SEC_DP_TZ_HV_HLOS_HDCP_RCVPORT_DATA0,
+ ksv[0]);
+ dp_write_hdcp_tz(catalog, 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_write_hdcp_tz(catalog, HDCP_SEC_DP_TZ_HV_HLOS_HDCP_RCVPORT_DATA12,
+ val);
+}
+
+void dp_catalog_hdcp_reset_sha_comp_block(struct dp_catalog *dp_catalog)
+{
+ struct dp_catalog_private *catalog =
+ container_of(dp_catalog, struct dp_catalog_private, dp_catalog);
+
+ dp_write_hdcp_tz(catalog, HDCP_SEC_DP_TZ_HV_HLOS_HDCP_SHA_CTRL,
+ DP_HDCP_SHA_CTRL_RESET);
+ dp_write_hdcp_tz(catalog, HDCP_SEC_DP_TZ_HV_HLOS_HDCP_SHA_CTRL, 0);
+}
+
+void dp_catalog_hdcp_write_tz(struct dp_catalog *dp_catalog, u32 offset,
+ u32 val)
+{
+ struct dp_catalog_private *catalog =
+ container_of(dp_catalog, struct dp_catalog_private, dp_catalog);
+
+ dp_write_hdcp_tz(catalog, offset, val);
+}
diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.h b/drivers/gpu/drm/msm/dp/dp_catalog.h
index 1f717f45c1158..565dbe3d802e3 100644
--- a/drivers/gpu/drm/msm/dp/dp_catalog.h
+++ b/drivers/gpu/drm/msm/dp/dp_catalog.h
@@ -135,4 +135,22 @@ void dp_catalog_audio_config_sdp(struct dp_catalog *catalog);
void dp_catalog_audio_init(struct dp_catalog *catalog);
void dp_catalog_audio_sfe_level(struct dp_catalog *catalog);

+/* HDCP APIs */
+u32 dp_catalog_hdcp_read_ahb(struct dp_catalog *dp_catalog, u32 offset);
+void dp_catalog_hdcp_write_ahb(struct dp_catalog *dp_catalog, u32 offset,
+ u32 val);
+void dp_catalog_hdcp_disable_hdcp1(struct dp_catalog *dp_catalog);
+void dp_catalog_hdcp_read_aksv(struct dp_catalog *dp_catalog, u32 *aksv);
+void dp_catalog_hdcp_write_aksv(struct dp_catalog *dp_catalog, u32 *aksv);
+void dp_catalog_hdcp_read_an(struct dp_catalog *dp_catalog, u32 *an);
+void dp_catalog_hdcp_clear_a_info(struct dp_catalog *dp_catalog);
+void dp_catalog_hdcp_write_key_words(struct dp_catalog *dp_catalog,
+ int key_offset, u32 *words);
+void dp_catalog_hdcp_post_write_key(struct dp_catalog *dp_catalog);
+void dp_catalog_hdcp_hdcp1_store_receiver_info(struct dp_catalog *dp_catalog,
+ u32 *ksv, u32 status, u8 bcaps);
+void dp_catalog_hdcp_reset_sha_comp_block(struct dp_catalog *dp_catalog);
+void dp_catalog_hdcp_write_tz(struct dp_catalog *dp_catalog, u32 offset,
+ u32 val);
+
#endif /* _DP_CATALOG_H_ */
diff --git a/drivers/gpu/drm/msm/dp/dp_debug.c b/drivers/gpu/drm/msm/dp/dp_debug.c
index 5e35033ba3e43..bfef65b0c0f92 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 +267,14 @@ 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 +296,7 @@ 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 8c0d0b5178fdf..ab6c5e8e5ea63 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"

@@ -34,6 +35,7 @@ struct dp_debug {
* @panel: instance of panel module
* @usbpd: instance of usbpd module
* @link: instance of link module
+ * @hdcp: instance of hdcp module
* @connector: double pointer to display connector
* @minor: pointer to drm minor number after device registration
* return: pointer to allocated debug module data
@@ -42,9 +44,10 @@ struct dp_debug {
* for debugfs input to be communicated with existing modules
*/
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);

/**
* dp_debug_put()
@@ -59,7 +62,7 @@ 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 dp_usbpd *usbpd, struct dp_link *link, 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 bde1a7ce442ff..7c90d7cefedbc 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;
@@ -190,6 +192,14 @@ 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_bridge_to_hdcp(struct drm_bridge *bridge)
+{
+ struct msm_dp *dp_display = msm_dp_from_bridge(bridge);
+ struct dp_display_private *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)
{
@@ -752,6 +762,7 @@ 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);
@@ -852,8 +863,18 @@ 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:
@@ -965,6 +986,15 @@ 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 =
+ 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
@@ -1528,7 +1558,7 @@ void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor)
dev = &dp->pdev->dev;

dp->debug = dp_debug_get(dev, dp->panel, dp->usbpd,
- dp->link, dp->dp_display.connector,
+ dp->link, dp->hdcp, dp->dp_display.connector,
minor);
if (IS_ERR(dp->debug)) {
rc = PTR_ERR(dp->debug);
@@ -1649,6 +1679,13 @@ 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_priv->hdcp, dp_display->connector,
+ dp_display->bridge, dp_priv->catalog);
+ 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 371337d0fae26..1d64b86b0b354 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.h
+++ b/drivers/gpu/drm/msm/dp/dp_display.h
@@ -31,8 +31,13 @@ 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_bridge_to_hdcp(struct drm_bridge *bridge);
+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 275370f211159..6bf3b224ccaef 100644
--- a/drivers/gpu/drm/msm/dp/dp_drm.c
+++ b/drivers/gpu/drm/msm/dp/dp_drm.c
@@ -7,11 +7,19 @@
#include <drm/drm_atomic.h>
#include <drm/drm_bridge.h>
#include <drm/drm_bridge_connector.h>
+#include <drm/drm_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"
+
+struct msm_dp *msm_dp_from_bridge(struct drm_bridge *bridge)
+{
+ return to_dp_bridge(bridge)->dp_display;
+}

/**
* dp_bridge_detect - callback to determine if connector is connected
@@ -37,8 +45,8 @@ static int dp_bridge_atomic_check(struct drm_bridge *bridge,
struct drm_connector_state *conn_state)
{
struct msm_dp *dp;
-
- dp = to_dp_bridge(bridge)->dp_display;
+ struct msm_dp_bridge *dp_bridge = to_dp_bridge(bridge);
+ dp = dp_bridge->dp_display;

drm_dbg_dp(dp->drm_dev, "is_connected = %s\n",
(dp->is_connected) ? "true" : "false");
@@ -54,8 +62,11 @@ 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->hdcp_transition =
+ drm_hdcp_has_changed(conn_state->connector, conn_state->state);

return 0;
}
@@ -107,6 +118,25 @@ static const struct drm_bridge_funcs dp_bridge_ops = {
.hpd_notify = dp_bridge_hpd_notify,
};

+bool dp_drm_is_bridge_msm_dp(struct drm_bridge *bridge)
+{
+ return bridge->funcs == &dp_bridge_ops;
+}
+
+void dp_drm_atomic_commit(struct drm_bridge *bridge,
+ struct drm_atomic_state *state)
+{
+ struct msm_dp_bridge *dp_bridge = to_dp_bridge(bridge);
+ struct msm_dp *dp_disp;
+
+ if (!dp_bridge->hdcp_transition)
+ return;
+
+ dp_disp = msm_dp_from_bridge(bridge);
+
+ dp_display_hdcp_commit(dp_disp, state);
+}
+
struct drm_bridge *dp_bridge_init(struct msm_dp *dp_display, struct drm_device *dev,
struct drm_encoder *encoder)
{
@@ -119,6 +149,7 @@ struct drm_bridge *dp_bridge_init(struct msm_dp *dp_display, struct drm_device *
return ERR_PTR(-ENOMEM);

dp_bridge->dp_display = dp_display;
+ dp_bridge->hdcp_transition = false;

bridge = &dp_bridge->bridge;
bridge->funcs = &dp_bridge_ops;
diff --git a/drivers/gpu/drm/msm/dp/dp_drm.h b/drivers/gpu/drm/msm/dp/dp_drm.h
index 250f7c66201f2..9b3f81cf2e139 100644
--- a/drivers/gpu/drm/msm/dp/dp_drm.h
+++ b/drivers/gpu/drm/msm/dp/dp_drm.h
@@ -15,11 +15,18 @@
struct msm_dp_bridge {
struct drm_bridge bridge;
struct msm_dp *dp_display;
+ bool hdcp_transition;
};

#define to_dp_bridge(x) container_of((x), struct msm_dp_bridge, bridge)

+struct msm_dp *msm_dp_from_bridge(struct drm_bridge *bridge);
+
struct drm_connector *dp_drm_connector_init(struct msm_dp *dp_display, struct drm_encoder *encoder);
+bool dp_drm_is_bridge_msm_dp(struct drm_bridge *bridge);
+void dp_drm_atomic_commit(struct drm_bridge *bridge,
+ struct drm_atomic_state *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_hdcp.c b/drivers/gpu/drm/msm/dp/dp_hdcp.c
new file mode 100644
index 0000000000000..191340971f943
--- /dev/null
+++ b/drivers/gpu/drm/msm/dp/dp_hdcp.c
@@ -0,0 +1,389 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright (C) 2023 Google, Inc.
+ *
+ * Authors:
+ * Sean Paul <seanpaul@xxxxxxxxxxxx>
+ */
+
+#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>
+
+/* 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)
+
+/*
+ * 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;
+
+ struct dp_catalog *catalog;
+};
+
+int dp_hdcp_ingest_key(struct dp_hdcp *hdcp, const u8 *raw_key, int raw_len)
+{
+ unsigned int ksv_weight;
+ int i, ret = 0;
+ int expected_len =
+ DRM_HDCP_KSV_LEN + DP_HDCP_NUM_KEYS * DP_HDCP_KEY_LEN;
+
+ if (raw_len != expected_len) {
+ DRM_ERROR("Invalid HDCP key length expected=%d actual=%d\n",
+ expected_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,
+ void *driver_data)
+{
+ struct drm_bridge *bridge = (struct drm_bridge *)driver_data;
+ struct dp_hdcp *hdcp = dp_display_bridge_to_hdcp(bridge);
+ u32 val;
+
+ val = dp_catalog_hdcp_read_ahb(hdcp->catalog, 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, void *driver_data)
+{
+ struct drm_bridge *bridge = (struct drm_bridge *)driver_data;
+ struct dp_hdcp *hdcp = dp_display_bridge_to_hdcp(bridge);
+ int i, ret = 0;
+
+ mutex_lock(&hdcp->key_lock);
+
+ if (!hdcp->key.valid) {
+ ret = -ENOENT;
+ goto out;
+ }
+
+ dp_catalog_hdcp_write_aksv(hdcp->catalog, hdcp->key.ksv.words);
+
+
+ for (i = 0; i < DP_HDCP_NUM_KEYS; i++) {
+ dp_catalog_hdcp_write_key_words(hdcp->catalog, i,
+ hdcp->key.keys[i].words);
+ }
+ dp_catalog_hdcp_post_write_key(hdcp->catalog);
+
+out:
+ mutex_unlock(&hdcp->key_lock);
+ return ret;
+}
+
+static int dp_hdcp_hdcp2_capable(struct drm_connector *connector, bool *capable,
+ void *driver_data)
+{
+ *capable = false;
+ return 0;
+}
+
+static int dp_hdcp_hdcp1_read_an_aksv(struct drm_connector *connector, u32 *an,
+ u32 *aksv, void *driver_data)
+{
+ struct drm_bridge *bridge = (struct drm_bridge *)driver_data;
+ struct dp_hdcp *hdcp = dp_display_bridge_to_hdcp(bridge);
+ bool keys_valid;
+ int ret;
+ u32 val;
+
+ dp_catalog_hdcp_write_ahb(hdcp->catalog, 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,
+ driver_data);
+ if (ret) {
+ drm_err(hdcp->dev, "HDCP keys invalid %d\n", ret);
+ return ret;
+ }
+
+ /* Clear AInfo */
+ dp_catalog_hdcp_clear_a_info(hdcp->catalog);
+
+ dp_catalog_hdcp_read_aksv(hdcp->catalog, aksv);
+
+ ret = read_poll_timeout(dp_catalog_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->catalog, DP_HDCP_STATUS);
+ if (ret) {
+ drm_err(hdcp->dev, "AN failed to become ready %x/%d\n", val,
+ ret);
+ return ret;
+ }
+
+ dp_catalog_hdcp_read_an(hdcp->catalog, an);
+
+ return 0;
+}
+
+static int dp_hdcp_hdcp1_store_receiver_info(struct drm_connector *connector,
+ u32 *ksv, u32 status, u8 bcaps,
+ bool is_repeater,
+ void *driver_data)
+{
+ struct drm_bridge *bridge = (struct drm_bridge *)driver_data;
+ struct dp_hdcp *hdcp = dp_display_bridge_to_hdcp(bridge);
+
+ dp_catalog_hdcp_hdcp1_store_receiver_info(hdcp->catalog, ksv, status,
+ bcaps);
+
+ return 0;
+}
+
+static int dp_hdcp_hdcp1_enable_encryption(struct drm_connector *connector,
+ void *driver_data)
+{
+ /*
+ * On Qcom hardware, there is nothing explicit about enabling encryption
+ * like it is the case in other drivers. It gets enabled by default.
+ */
+ return 0;
+}
+
+static int dp_hdcp_hdcp1_wait_for_r0(struct drm_connector *connector,
+ void *driver_data)
+{
+ struct drm_bridge *bridge = (struct drm_bridge *)driver_data;
+ struct dp_hdcp *hdcp = dp_display_bridge_to_hdcp(bridge);
+ int ret;
+ u32 val;
+
+ ret = read_poll_timeout(dp_catalog_hdcp_read_ahb, val,
+ (val & DP_HDCP_R0_READY), DP_R0_READY_SLEEP_US,
+ DP_R0_READY_TIMEOUT_US, false, hdcp->catalog,
+ 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,
+ void *driver_data)
+{
+ struct drm_bridge *bridge = (struct drm_bridge *)driver_data;
+ struct dp_hdcp *hdcp = dp_display_bridge_to_hdcp(bridge);
+ int ret;
+ u32 val;
+
+ dp_catalog_hdcp_write_ahb(hdcp->catalog, DP_HDCP_RCVPORT_DATA2_0,
+ ri_prime);
+
+ ret = read_poll_timeout(dp_catalog_hdcp_read_ahb, val,
+ (val & DP_HDCP_RI_MATCH), DP_RI_MATCH_SLEEP_US,
+ DP_RI_MATCH_TIMEOUT_US, false, hdcp->catalog,
+ 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,
+ void *driver_data)
+{
+ struct drm_bridge *bridge = (struct drm_bridge *)driver_data;
+ struct dp_hdcp *hdcp = dp_display_bridge_to_hdcp(bridge);
+ int num_bytes = num_downstream * DRM_HDCP_KSV_LEN;
+ int ret, i;
+ u32 val;
+
+ dp_catalog_hdcp_reset_sha_comp_block(hdcp->catalog);
+
+ /*
+ * 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_catalog_hdcp_write_tz(hdcp->catalog,
+ HDCP_SEC_DP_TZ_HV_HLOS_HDCP_SHA_DATA,
+ val);
+
+ if ((i + 1) % 64 != 0)
+ continue;
+
+ ret = read_poll_timeout(dp_catalog_hdcp_read_ahb, val,
+ (val & DP_HDCP_SHA_DONE),
+ DP_KSV_WRITTEN_SLEEP_US,
+ DP_KSV_WRITTEN_TIMEOUT_US, false,
+ hdcp->catalog, DP_HDCP_SHA_STATUS);
+ if (ret) {
+ drm_err(hdcp->dev, "SHA block incomplete %d\n", ret);
+ return ret;
+ }
+ }
+
+ ret = read_poll_timeout(dp_catalog_hdcp_read_ahb, val,
+ (val & DP_HDCP_SHA_COMP_DONE),
+ DP_SHA_COMPUTATION_SLEEP_US,
+ DP_SHA_COMPUTATION_TIMEOUT_US, false,
+ hdcp->catalog, 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,
+ void *driver_data)
+{
+ struct drm_bridge *bridge = (struct drm_bridge *)driver_data;
+ struct dp_hdcp *hdcp = dp_display_bridge_to_hdcp(bridge);
+ dp_catalog_hdcp_disable_hdcp1(hdcp->catalog);
+ 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_bridge *bridge, struct dp_catalog *catalog)
+{
+ 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);
+
+ helper_data->driver_data = bridge;
+ hdcp->dev = connector->dev;
+ hdcp->connector = connector;
+ hdcp->helper_data = helper_data;
+ hdcp->catalog = catalog;
+
+ 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 0000000000000..4586e45d14d26
--- /dev/null
+++ b/drivers/gpu/drm/msm/dp/dp_hdcp.h
@@ -0,0 +1,33 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright (C) 2021 Google, Inc.
+ *
+ * Authors:
+ * Sean Paul <seanpaul@xxxxxxxxxxxx>
+ */
+
+#ifndef DP_HDCP_H_
+#define DP_HDCP_H_
+
+#include <drm/display/drm_hdcp_helper.h>
+#include <drm/drm_bridge.h>
+
+#include "dp_catalog.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,
+ struct drm_bridge *bridgem, struct dp_catalog *catalog);
+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 /* _DP_HDCP_H_ */
diff --git a/drivers/gpu/drm/msm/dp/dp_parser.c b/drivers/gpu/drm/msm/dp/dp_parser.c
index 7032dcc8842b3..1f9bb001aebc3 100644
--- a/drivers/gpu/drm/msm/dp/dp_parser.c
+++ b/drivers/gpu/drm/msm/dp/dp_parser.c
@@ -39,6 +39,8 @@ static int dp_parser_ctrl_res(struct dp_parser *parser)
struct platform_device *pdev = parser->pdev;
struct dp_io *io = &parser->io;
struct dss_io_data *dss = &io->dp_controller;
+ void __iomem *dss_hdcp_key;
+ size_t dss_hdcp_key_len;

dss->ahb.base = dp_ioremap(pdev, 0, &dss->ahb.len);
if (IS_ERR(dss->ahb.base))
@@ -84,6 +86,18 @@ static int dp_parser_ctrl_res(struct dp_parser *parser)
}
}

+ dss_hdcp_key = dp_ioremap(pdev, 5, &dss_hdcp_key_len);
+ if (!IS_ERR(dss_hdcp_key)) {
+ dss->hdcp_key.base = dss_hdcp_key;
+ dss->hdcp_key.len = dss_hdcp_key_len;
+ 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);
+ }
+ }
+
io->phy = devm_phy_get(&pdev->dev, "dp");
if (IS_ERR(io->phy))
return PTR_ERR(io->phy);
diff --git a/drivers/gpu/drm/msm/dp/dp_parser.h b/drivers/gpu/drm/msm/dp/dp_parser.h
index 1f068626d445e..8b5dd3deb85ff 100644
--- a/drivers/gpu/drm/msm/dp/dp_parser.h
+++ b/drivers/gpu/drm/msm/dp/dp_parser.h
@@ -35,6 +35,8 @@ 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)
@@ -69,6 +71,8 @@ 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 268602803d9a3..d2ac60ce7ae50 100644
--- a/drivers/gpu/drm/msm/dp/dp_reg.h
+++ b/drivers/gpu/drm/msm/dp/dp_reg.h
@@ -10,7 +10,8 @@
#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 +284,46 @@
/* 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 1686fbb611fd7..2168188d6379c 100644
--- a/drivers/gpu/drm/msm/msm_atomic.c
+++ b/drivers/gpu/drm/msm/msm_atomic.c
@@ -5,8 +5,11 @@
*/

#include <drm/drm_atomic_uapi.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_device.h>
#include <drm/drm_vblank.h>

+#include "dp/dp_drm.h"
#include "msm_atomic_trace.h"
#include "msm_drv.h"
#include "msm_gem.h"
@@ -179,6 +182,20 @@ 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_device *dev = state->dev;
+ struct msm_drm_private *priv = dev->dev_private;
+ int i;
+
+ for (i = 0; i < priv->num_bridges; ++i) {
+ struct drm_bridge *bridge = priv->bridges[i];
+ if (dp_drm_is_bridge_msm_dp(bridge)) {
+ dp_drm_atomic_commit(bridge, state);
+ }
+ }
+}
+
void msm_atomic_commit_tail(struct drm_atomic_state *state)
{
struct drm_device *dev = state->dev;
@@ -215,6 +232,8 @@ 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)];
--
2.40.0.634.g4ca3ef3211-goog

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