[PATCH v5 0/9] drm/amd/display: switch amdgpu_dm_connector to use struct drm_edid

[PATCH v5 0/9] drm/amd/display: switch amdgpu_dm_connector to use struct drm_edid

[Melissa Wen]

Hi,

Here AMD display driver migrates from open struct edid to opaque
drm_edid. This version works on top of amd/drm-next branch since
amd-staging-drm-next doesn't have the commits that support
drm_edid_product_id[1]. It's mostly addressing Alex Hung's feedback
from the previous version.

Patches 1-4 works on amd-staging-drm-next.
- First patch basically changes amd connector to store struct drm_edid
  instead of edid with some pending rework to get rid of raw edid.
- 2-4 update the driver code to use drm common-code, removing
  driver-specific steps already done during drm_edid updates.

Patches 5-9 depend on drm_edid_product_id, therefore, it doesn't work on
current amd-staging-drm-next. They parse edid caps from drm_eld and
drm_edid_product_id data, removing the need of handling raw edid in the
dm_helpers_parse_edid_caps(), since all callers of this helper has
updated display info from drm_edid at this point.

To completely remove raw edid, I changed dc/link_detection in the last
commit because all calls of dm_helpers_parse_edid_caps in
link_add_remote_sink are preceded by the setup and update of drm_edid in
the connector, so we can always use the connector->drm_edid. 

Finally, there are some pending drm_edid_raw to be addressed in next
iterations.

Let me know your thoughts.

Melissa

Change log:
v1: https://lore.kernel.org/amd-gfx/20240126163429.56714-1-mwen@igalia.com/
- use const to fix compilation warnings (Alex Hung)
- remove unused variables
- remove driver-specific parser for connector info in favor of drm_edid
  common code

v2: https://lore.kernel.org/amd-gfx/20240327165828.288792-1-mwen@igalia.com/
- fix general protection fault on mst

v3: https://lore.kernel.org/amd-gfx/20240327214953.367126-1-mwen@igalia.com/
- rename edid to drm_edid in amdgpu_connector (Jani)
- call drm_edid_connector_update to clear edid in case of NULL (Jani)
- keep setting NULL instead of free drm_edid (Jani)
- check drm_edid not NULL, instead of valid (Jani)
- use drm_edid_product_id to parse product info
- use drm_eld info to parse edid caps

v4: https://lore.kernel.org/amd-gfx/20240706034004.801329-1-mwen@igalia.com/
- squash variable cleanup to related common-code cleanup (Alex H)
- add more informative commit description (Alex H)
- avoid unnecessary call to drm_edid_raw (Alex H)
- remove unnecessary cast (Alex H.)
- remove deprecated comments (Alex H.)
- fix kernel-doc (kernel test bot)

[1] https://lore.kernel.org/dri-devel/cover.1712655867.git.jani.nikula@intel.com

Melissa Wen (9):
  drm/amd/display: switch amdgpu_dm_connector to use struct drm_edid
  drm/amd/display: switch to setting physical address directly
  drm/amd/display: always call connector_update when parsing
    freesync_caps
  drm/amd/display: remove redundant freesync parser for DP
  drm/amd/display: use drm_edid_product_id for parsing EDID product info
  drm/amd/display: parse display name from drm_eld
  drm/amd/display: get SAD from drm_eld when parsing EDID caps
  drm/amd/display: get SADB from drm_eld when parsing EDID caps
  drm/amd/display: remove dc_edid handler from
    dm_helpers_parse_edid_caps

 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 196 +++++-------------
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h |   4 +-
 .../amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 113 +++++-----
 .../display/amdgpu_dm/amdgpu_dm_mst_types.c   |  32 +--
 drivers/gpu/drm/amd/display/dc/dm_helpers.h   |   1 -
 .../drm/amd/display/dc/link/link_detection.c  |   6 +-
 6 files changed, 131 insertions(+), 221 deletions(-)

-- 
2.43.0

[PATCH v5 1/9] drm/amd/display: switch amdgpu_dm_connector to use struct drm_edid

[Melissa Wen]

Replace raw edid handling (struct edid) with the opaque EDID type
(struct drm_edid) on amdgpu_dm_connector for consistency. It may also
prevent mismatch of approaches in different parts of the driver code.
Working in progress. It was only exercised with IGT tests.

v2: use const to fix warnings (Alex Hung)
v3: fix general protection fault on mst
v4: rename edid to drm_edid in amdgpu_connector (Jani)
    call drm_edid_connector_update to clear edid in case of NULL (Jani)
    keep setting NULL instead of free drm_edid (Jani)
    check drm_edid not NULL, instead of valid (Jani)
v5: remove deprecated comments (Alex H)
    use edid from dc_sink instead of call drm_edid_raw for now (Alex H)
    remove unnecessary cast (Alex H)

Signed-off-by: Melissa Wen <mwen@igalia.com>
---
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 120 ++++++++----------
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h |   4 +-
 .../amd/display/amdgpu_dm/amdgpu_dm_helpers.c |  13 +-
 .../display/amdgpu_dm/amdgpu_dm_mst_types.c   |  32 ++---
 4 files changed, 80 insertions(+), 89 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index ec6064d40dbf..fff1f0c524fc 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -3423,7 +3423,7 @@ void amdgpu_dm_update_connector_after_detect(
 			aconnector->dc_sink = sink;
 			dc_sink_retain(aconnector->dc_sink);
 			amdgpu_dm_update_freesync_caps(connector,
-					aconnector->edid);
+					aconnector->drm_edid);
 		} else {
 			amdgpu_dm_update_freesync_caps(connector, NULL);
 			if (!aconnector->dc_sink) {
@@ -3482,18 +3482,18 @@ void amdgpu_dm_update_connector_after_detect(
 		aconnector->dc_sink = sink;
 		dc_sink_retain(aconnector->dc_sink);
 		if (sink->dc_edid.length == 0) {
-			aconnector->edid = NULL;
+			aconnector->drm_edid = NULL;
 			if (aconnector->dc_link->aux_mode) {
 				drm_dp_cec_unset_edid(
 					&aconnector->dm_dp_aux.aux);
 			}
 		} else {
-			aconnector->edid =
-				(struct edid *)sink->dc_edid.raw_edid;
+			const struct edid *edid = (const struct edid *)sink->dc_edid.raw_edid;
+			aconnector->drm_edid = drm_edid_alloc(edid, sink->dc_edid.length);
+			drm_edid_connector_update(connector, aconnector->drm_edid);
 
 			if (aconnector->dc_link->aux_mode)
-				drm_dp_cec_set_edid(&aconnector->dm_dp_aux.aux,
-						    aconnector->edid);
+				drm_dp_cec_set_edid(&aconnector->dm_dp_aux.aux, edid);
 		}
 
 		if (!aconnector->timing_requested) {
@@ -3504,17 +3504,18 @@ void amdgpu_dm_update_connector_after_detect(
 					"failed to create aconnector->requested_timing\n");
 		}
 
-		drm_connector_update_edid_property(connector, aconnector->edid);
-		amdgpu_dm_update_freesync_caps(connector, aconnector->edid);
+		drm_edid_connector_update(connector, aconnector->drm_edid);
+		amdgpu_dm_update_freesync_caps(connector, aconnector->drm_edid);
 		update_connector_ext_caps(aconnector);
 	} else {
 		drm_dp_cec_unset_edid(&aconnector->dm_dp_aux.aux);
 		amdgpu_dm_update_freesync_caps(connector, NULL);
-		drm_connector_update_edid_property(connector, NULL);
+		drm_edid_connector_update(connector, NULL);
 		aconnector->num_modes = 0;
 		dc_sink_release(aconnector->dc_sink);
 		aconnector->dc_sink = NULL;
-		aconnector->edid = NULL;
+		drm_edid_free(aconnector->drm_edid);
+		aconnector->drm_edid = NULL;
 		kfree(aconnector->timing_requested);
 		aconnector->timing_requested = NULL;
 		/* Set CP to DESIRED if it was ENABLED, so we can re-enable it again on hotplug */
@@ -7013,32 +7014,24 @@ static void amdgpu_dm_connector_funcs_force(struct drm_connector *connector)
 	struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
 	struct dc_link *dc_link = aconnector->dc_link;
 	struct dc_sink *dc_em_sink = aconnector->dc_em_sink;
-	struct edid *edid;
-	struct i2c_adapter *ddc;
+	const struct drm_edid *drm_edid;
 
-	if (dc_link && dc_link->aux_mode)
-		ddc = &aconnector->dm_dp_aux.aux.ddc;
-	else
-		ddc = &aconnector->i2c->base;
-
-	/*
-	 * Note: drm_get_edid gets edid in the following order:
-	 * 1) override EDID if set via edid_override debugfs,
-	 * 2) firmware EDID if set via edid_firmware module parameter
-	 * 3) regular DDC read.
-	 */
-	edid = drm_get_edid(connector, ddc);
-	if (!edid) {
+	drm_edid = drm_edid_read(connector);
+	drm_edid_connector_update(connector, drm_edid);
+	if (!drm_edid) {
 		DRM_ERROR("No EDID found on connector: %s.\n", connector->name);
 		return;
 	}
 
-	aconnector->edid = edid;
-
+	aconnector->drm_edid = drm_edid;
 	/* Update emulated (virtual) sink's EDID */
 	if (dc_em_sink && dc_link) {
+		// FIXME: Get rid of drm_edid_raw()
+		const struct edid *edid = drm_edid_raw(drm_edid);
+
 		memset(&dc_em_sink->edid_caps, 0, sizeof(struct dc_edid_caps));
-		memmove(dc_em_sink->dc_edid.raw_edid, edid, (edid->extensions + 1) * EDID_LENGTH);
+		memmove(dc_em_sink->dc_edid.raw_edid, edid,
+			(edid->extensions + 1) * EDID_LENGTH);
 		dm_helpers_parse_edid_caps(
 			dc_link,
 			&dc_em_sink->dc_edid,
@@ -7068,36 +7061,26 @@ static int get_modes(struct drm_connector *connector)
 static void create_eml_sink(struct amdgpu_dm_connector *aconnector)
 {
 	struct drm_connector *connector = &aconnector->base;
-	struct dc_link *dc_link = aconnector->dc_link;
 	struct dc_sink_init_data init_params = {
 			.link = aconnector->dc_link,
 			.sink_signal = SIGNAL_TYPE_VIRTUAL
 	};
-	struct edid *edid;
-	struct i2c_adapter *ddc;
+	const struct drm_edid *drm_edid;
+	const struct edid *edid;
 
-	if (dc_link->aux_mode)
-		ddc = &aconnector->dm_dp_aux.aux.ddc;
-	else
-		ddc = &aconnector->i2c->base;
-
-	/*
-	 * Note: drm_get_edid gets edid in the following order:
-	 * 1) override EDID if set via edid_override debugfs,
-	 * 2) firmware EDID if set via edid_firmware module parameter
-	 * 3) regular DDC read.
-	 */
-	edid = drm_get_edid(connector, ddc);
-	if (!edid) {
+	drm_edid = drm_edid_read(connector);
+	drm_edid_connector_update(connector, drm_edid);
+	if (!drm_edid) {
 		DRM_ERROR("No EDID found on connector: %s.\n", connector->name);
 		return;
 	}
 
-	if (drm_detect_hdmi_monitor(edid))
+	if (connector->display_info.is_hdmi)
 		init_params.sink_signal = SIGNAL_TYPE_HDMI_TYPE_A;
 
-	aconnector->edid = edid;
+	aconnector->drm_edid = drm_edid;
 
+	edid = drm_edid_raw(drm_edid); // FIXME: Get rid of drm_edid_raw()
 	aconnector->dc_em_sink = dc_link_add_remote_sink(
 		aconnector->dc_link,
 		(uint8_t *)edid,
@@ -7784,16 +7767,16 @@ static void amdgpu_set_panel_orientation(struct drm_connector *connector)
 }
 
 static void amdgpu_dm_connector_ddc_get_modes(struct drm_connector *connector,
-					      struct edid *edid)
+					      const struct drm_edid *drm_edid)
 {
 	struct amdgpu_dm_connector *amdgpu_dm_connector =
 			to_amdgpu_dm_connector(connector);
 
-	if (edid) {
+	if (drm_edid) {
 		/* empty probed_modes */
 		INIT_LIST_HEAD(&connector->probed_modes);
 		amdgpu_dm_connector->num_modes =
-				drm_add_edid_modes(connector, edid);
+				drm_edid_connector_add_modes(connector);
 
 		/* sorting the probed modes before calling function
 		 * amdgpu_dm_get_native_mode() since EDID can have
@@ -7807,10 +7790,10 @@ static void amdgpu_dm_connector_ddc_get_modes(struct drm_connector *connector,
 		amdgpu_dm_get_native_mode(connector);
 
 		/* Freesync capabilities are reset by calling
-		 * drm_add_edid_modes() and need to be
+		 * drm_edid_connector_add_modes() and need to be
 		 * restored here.
 		 */
-		amdgpu_dm_update_freesync_caps(connector, edid);
+		amdgpu_dm_update_freesync_caps(connector, drm_edid);
 	} else {
 		amdgpu_dm_connector->num_modes = 0;
 	}
@@ -7906,12 +7889,12 @@ static uint add_fs_modes(struct amdgpu_dm_connector *aconnector)
 }
 
 static void amdgpu_dm_connector_add_freesync_modes(struct drm_connector *connector,
-						   struct edid *edid)
+						   const struct drm_edid *drm_edid)
 {
 	struct amdgpu_dm_connector *amdgpu_dm_connector =
 		to_amdgpu_dm_connector(connector);
 
-	if (!(amdgpu_freesync_vid_mode && edid))
+	if (!(amdgpu_freesync_vid_mode && drm_edid))
 		return;
 
 	if (amdgpu_dm_connector->max_vfreq - amdgpu_dm_connector->min_vfreq > 10)
@@ -7924,24 +7907,24 @@ static int amdgpu_dm_connector_get_modes(struct drm_connector *connector)
 	struct amdgpu_dm_connector *amdgpu_dm_connector =
 			to_amdgpu_dm_connector(connector);
 	struct drm_encoder *encoder;
-	struct edid *edid = amdgpu_dm_connector->edid;
+	const struct drm_edid *drm_edid = amdgpu_dm_connector->drm_edid;
 	struct dc_link_settings *verified_link_cap =
 			&amdgpu_dm_connector->dc_link->verified_link_cap;
 	const struct dc *dc = amdgpu_dm_connector->dc_link->dc;
 
 	encoder = amdgpu_dm_connector_to_encoder(connector);
 
-	if (!drm_edid_is_valid(edid)) {
+	if (!drm_edid) {
 		amdgpu_dm_connector->num_modes =
 				drm_add_modes_noedid(connector, 640, 480);
 		if (dc->link_srv->dp_get_encoding_format(verified_link_cap) == DP_128b_132b_ENCODING)
 			amdgpu_dm_connector->num_modes +=
 				drm_add_modes_noedid(connector, 1920, 1080);
 	} else {
-		amdgpu_dm_connector_ddc_get_modes(connector, edid);
+		amdgpu_dm_connector_ddc_get_modes(connector, drm_edid);
 		if (encoder)
 			amdgpu_dm_connector_add_common_modes(encoder, connector);
-		amdgpu_dm_connector_add_freesync_modes(connector, edid);
+		amdgpu_dm_connector_add_freesync_modes(connector, drm_edid);
 	}
 	amdgpu_dm_fbc_init(connector);
 
@@ -11830,7 +11813,7 @@ static bool parse_edid_cea(struct amdgpu_dm_connector *aconnector,
 }
 
 static void parse_edid_displayid_vrr(struct drm_connector *connector,
-		struct edid *edid)
+				     const struct edid *edid)
 {
 	u8 *edid_ext = NULL;
 	int i;
@@ -11873,7 +11856,7 @@ static void parse_edid_displayid_vrr(struct drm_connector *connector,
 }
 
 static int parse_amd_vsdb(struct amdgpu_dm_connector *aconnector,
-			  struct edid *edid, struct amdgpu_hdmi_vsdb_info *vsdb_info)
+			  const struct edid *edid, struct amdgpu_hdmi_vsdb_info *vsdb_info)
 {
 	u8 *edid_ext = NULL;
 	int i;
@@ -11908,7 +11891,8 @@ static int parse_amd_vsdb(struct amdgpu_dm_connector *aconnector,
 }
 
 static int parse_hdmi_amd_vsdb(struct amdgpu_dm_connector *aconnector,
-		struct edid *edid, struct amdgpu_hdmi_vsdb_info *vsdb_info)
+			       const struct edid *edid,
+			       struct amdgpu_hdmi_vsdb_info *vsdb_info)
 {
 	u8 *edid_ext = NULL;
 	int i;
@@ -11950,19 +11934,19 @@ static int parse_hdmi_amd_vsdb(struct amdgpu_dm_connector *aconnector,
  * FreeSync parameters.
  */
 void amdgpu_dm_update_freesync_caps(struct drm_connector *connector,
-				    struct edid *edid)
+				    const struct drm_edid *drm_edid)
 {
 	int i = 0;
-	struct detailed_timing *timing;
-	struct detailed_non_pixel *data;
-	struct detailed_data_monitor_range *range;
+	const struct detailed_timing *timing;
+	const struct detailed_non_pixel *data;
+	const struct detailed_data_monitor_range *range;
 	struct amdgpu_dm_connector *amdgpu_dm_connector =
 			to_amdgpu_dm_connector(connector);
 	struct dm_connector_state *dm_con_state = NULL;
 	struct dc_sink *sink;
-
 	struct amdgpu_device *adev = drm_to_adev(connector->dev);
 	struct amdgpu_hdmi_vsdb_info vsdb_info = {0};
+	const struct edid *edid;
 	bool freesync_capable = false;
 	enum adaptive_sync_type as_type = ADAPTIVE_SYNC_TYPE_NONE;
 
@@ -11975,7 +11959,7 @@ void amdgpu_dm_update_freesync_caps(struct drm_connector *connector,
 		amdgpu_dm_connector->dc_sink :
 		amdgpu_dm_connector->dc_em_sink;
 
-	if (!edid || !sink) {
+	if (!drm_edid || !sink) {
 		dm_con_state = to_dm_connector_state(connector->state);
 
 		amdgpu_dm_connector->min_vfreq = 0;
@@ -11992,6 +11976,8 @@ void amdgpu_dm_update_freesync_caps(struct drm_connector *connector,
 	if (!adev->dm.freesync_module)
 		goto update;
 
+	edid = drm_edid_raw(drm_edid); // FIXME: Get rid of drm_edid_raw()
+
 	/* Some eDP panels only have the refresh rate range info in DisplayID */
 	if ((connector->display_info.monitor_range.min_vfreq == 0 ||
 	     connector->display_info.monitor_range.max_vfreq == 0))
@@ -12068,7 +12054,7 @@ void amdgpu_dm_update_freesync_caps(struct drm_connector *connector,
 			amdgpu_dm_connector->as_type = ADAPTIVE_SYNC_TYPE_EDP;
 		}
 
-	} else if (edid && sink->sink_signal == SIGNAL_TYPE_HDMI_TYPE_A) {
+	} else if (drm_edid && sink->sink_signal == SIGNAL_TYPE_HDMI_TYPE_A) {
 		i = parse_hdmi_amd_vsdb(amdgpu_dm_connector, edid, &vsdb_info);
 		if (i >= 0 && vsdb_info.freesync_supported) {
 			timing  = &edid->detailed_timings[i];
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
index 2d7755e2b6c3..c231d3058db8 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
@@ -673,7 +673,7 @@ struct amdgpu_dm_connector {
 
 	/* we need to mind the EDID between detect
 	   and get modes due to analog/digital/tvencoder */
-	struct edid *edid;
+	const struct drm_edid *drm_edid;
 
 	/* shared with amdgpu */
 	struct amdgpu_hpd hpd;
@@ -951,7 +951,7 @@ void dm_restore_drm_connector_state(struct drm_device *dev,
 				    struct drm_connector *connector);
 
 void amdgpu_dm_update_freesync_caps(struct drm_connector *connector,
-					struct edid *edid);
+				    const struct drm_edid *drm_edid);
 
 void amdgpu_dm_trigger_timing_sync(struct drm_device *dev);
 
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
index 165e010fe69c..2e07ce2e89f4 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
@@ -897,7 +897,8 @@ enum dc_edid_status dm_helpers_read_local_edid(
 	struct i2c_adapter *ddc;
 	int retry = 3;
 	enum dc_edid_status edid_status;
-	struct edid *edid;
+	const struct drm_edid *drm_edid;
+	const struct edid *edid;
 
 	if (link->aux_mode)
 		ddc = &aconnector->dm_dp_aux.aux.ddc;
@@ -909,25 +910,27 @@ enum dc_edid_status dm_helpers_read_local_edid(
 	 */
 	do {
 
-		edid = drm_get_edid(&aconnector->base, ddc);
+		drm_edid = drm_edid_read_ddc(connector, ddc);
+		drm_edid_connector_update(connector, drm_edid);
 
 		/* DP Compliance Test 4.2.2.6 */
 		if (link->aux_mode && connector->edid_corrupt)
 			drm_dp_send_real_edid_checksum(&aconnector->dm_dp_aux.aux, connector->real_edid_checksum);
 
-		if (!edid && connector->edid_corrupt) {
+		if (!drm_edid && connector->edid_corrupt) {
 			connector->edid_corrupt = false;
 			return EDID_BAD_CHECKSUM;
 		}
 
-		if (!edid)
+		if (!drm_edid)
 			return EDID_NO_RESPONSE;
 
+		edid = drm_edid_raw(drm_edid); // FIXME: Get rid of drm_edid_raw()
 		sink->dc_edid.length = EDID_LENGTH * (edid->extensions + 1);
 		memmove(sink->dc_edid.raw_edid, (uint8_t *)edid, sink->dc_edid.length);
 
 		/* We don't need the original edid anymore */
-		kfree(edid);
+		drm_edid_free(drm_edid);
 
 		edid_status = dm_helpers_parse_edid_caps(
 						link,
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
index 915eb2c08ece..76e74f6acf1e 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
@@ -129,7 +129,7 @@ dm_dp_mst_connector_destroy(struct drm_connector *connector)
 		dc_sink_release(aconnector->dc_sink);
 	}
 
-	kfree(aconnector->edid);
+	drm_edid_free(aconnector->drm_edid);
 
 	drm_connector_cleanup(connector);
 	drm_dp_mst_put_port_malloc(aconnector->mst_output_port);
@@ -182,7 +182,7 @@ amdgpu_dm_mst_connector_early_unregister(struct drm_connector *connector)
 
 		dc_sink_release(dc_sink);
 		aconnector->dc_sink = NULL;
-		aconnector->edid = NULL;
+		aconnector->drm_edid = NULL;
 		aconnector->dsc_aux = NULL;
 		port->passthrough_aux = NULL;
 	}
@@ -302,16 +302,16 @@ static int dm_dp_mst_get_modes(struct drm_connector *connector)
 	if (!aconnector)
 		return drm_add_edid_modes(connector, NULL);
 
-	if (!aconnector->edid) {
-		struct edid *edid;
+	if (!aconnector->drm_edid) {
+		const struct drm_edid *drm_edid;
 
-		edid = drm_dp_mst_get_edid(connector, &aconnector->mst_root->mst_mgr, aconnector->mst_output_port);
+		drm_edid = drm_dp_mst_edid_read(connector, &aconnector->mst_root->mst_mgr, aconnector->mst_output_port);
 
-		if (!edid) {
+		if (!drm_edid) {
 			amdgpu_dm_set_mst_status(&aconnector->mst_status,
 			MST_REMOTE_EDID, false);
 
-			drm_connector_update_edid_property(
+			drm_edid_connector_update(
 				&aconnector->base,
 				NULL);
 
@@ -345,7 +345,7 @@ static int dm_dp_mst_get_modes(struct drm_connector *connector)
 			return ret;
 		}
 
-		aconnector->edid = edid;
+		aconnector->drm_edid = drm_edid;
 		amdgpu_dm_set_mst_status(&aconnector->mst_status,
 			MST_REMOTE_EDID, true);
 	}
@@ -360,10 +360,13 @@ static int dm_dp_mst_get_modes(struct drm_connector *connector)
 		struct dc_sink_init_data init_params = {
 				.link = aconnector->dc_link,
 				.sink_signal = SIGNAL_TYPE_DISPLAY_PORT_MST };
+		const struct edid *edid;
+
+		edid = drm_edid_raw(aconnector->drm_edid); // FIXME: Get rid of drm_edid_raw()
 		dc_sink = dc_link_add_remote_sink(
 			aconnector->dc_link,
-			(uint8_t *)aconnector->edid,
-			(aconnector->edid->extensions + 1) * EDID_LENGTH,
+			(uint8_t *)edid,
+			(edid->extensions + 1) * EDID_LENGTH,
 			&init_params);
 
 		if (!dc_sink) {
@@ -405,7 +408,7 @@ static int dm_dp_mst_get_modes(struct drm_connector *connector)
 
 		if (aconnector->dc_sink) {
 			amdgpu_dm_update_freesync_caps(
-					connector, aconnector->edid);
+					connector, aconnector->drm_edid);
 
 #if defined(CONFIG_DRM_AMD_DC_FP)
 			if (!validate_dsc_caps_on_connector(aconnector))
@@ -419,10 +422,9 @@ static int dm_dp_mst_get_modes(struct drm_connector *connector)
 		}
 	}
 
-	drm_connector_update_edid_property(
-					&aconnector->base, aconnector->edid);
+	drm_edid_connector_update(&aconnector->base, aconnector->drm_edid);
 
-	ret = drm_add_edid_modes(connector, aconnector->edid);
+	ret = drm_edid_connector_add_modes(connector);
 
 	return ret;
 }
@@ -500,7 +502,7 @@ dm_dp_mst_detect(struct drm_connector *connector,
 
 		dc_sink_release(aconnector->dc_sink);
 		aconnector->dc_sink = NULL;
-		aconnector->edid = NULL;
+		aconnector->drm_edid = NULL;
 		aconnector->dsc_aux = NULL;
 		port->passthrough_aux = NULL;
 
-- 
2.43.0

[PATCH v5 2/9] drm/amd/display: switch to setting physical address directly

[Melissa Wen]

Connectors have source physical address available in display
info. Use drm_dp_cec_attach() to use it instead of parsing the EDID
again.

Signed-off-by: Melissa Wen <mwen@igalia.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index fff1f0c524fc..c43baa3d30f8 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -3484,8 +3484,7 @@ void amdgpu_dm_update_connector_after_detect(
 		if (sink->dc_edid.length == 0) {
 			aconnector->drm_edid = NULL;
 			if (aconnector->dc_link->aux_mode) {
-				drm_dp_cec_unset_edid(
-					&aconnector->dm_dp_aux.aux);
+				drm_dp_cec_unset_edid(&aconnector->dm_dp_aux.aux);
 			}
 		} else {
 			const struct edid *edid = (const struct edid *)sink->dc_edid.raw_edid;
@@ -3493,7 +3492,8 @@ void amdgpu_dm_update_connector_after_detect(
 			drm_edid_connector_update(connector, aconnector->drm_edid);
 
 			if (aconnector->dc_link->aux_mode)
-				drm_dp_cec_set_edid(&aconnector->dm_dp_aux.aux, edid);
+				drm_dp_cec_attach(&aconnector->dm_dp_aux.aux,
+						  connector->display_info.source_physical_address);
 		}
 
 		if (!aconnector->timing_requested) {
-- 
2.43.0

[PATCH v5 3/9] drm/amd/display: always call connector_update when parsing freesync_caps

[Melissa Wen]

Update connector caps with drm_edid data before parsing info for
freesync.

Signed-off-by: Melissa Wen <mwen@igalia.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index c43baa3d30f8..0ee453d2cd65 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -3504,13 +3504,11 @@ void amdgpu_dm_update_connector_after_detect(
 					"failed to create aconnector->requested_timing\n");
 		}
 
-		drm_edid_connector_update(connector, aconnector->drm_edid);
 		amdgpu_dm_update_freesync_caps(connector, aconnector->drm_edid);
 		update_connector_ext_caps(aconnector);
 	} else {
 		drm_dp_cec_unset_edid(&aconnector->dm_dp_aux.aux);
 		amdgpu_dm_update_freesync_caps(connector, NULL);
-		drm_edid_connector_update(connector, NULL);
 		aconnector->num_modes = 0;
 		dc_sink_release(aconnector->dc_sink);
 		aconnector->dc_sink = NULL;
@@ -11959,6 +11957,8 @@ void amdgpu_dm_update_freesync_caps(struct drm_connector *connector,
 		amdgpu_dm_connector->dc_sink :
 		amdgpu_dm_connector->dc_em_sink;
 
+	drm_edid_connector_update(connector, drm_edid);
+
 	if (!drm_edid || !sink) {
 		dm_con_state = to_dm_connector_state(connector->state);
 
-- 
2.43.0

[PATCH v5 4/9] drm/amd/display: remove redundant freesync parser for DP

[Melissa Wen]

When updating connector under drm_edid infrastructure, many calculations
and validations are already done and become redundant inside AMD driver.
Remove those driver-specific code in favor of the DRM common code.

v5:
- squash with unused variabels cleanup (Alex H.)

Signed-off-by: Melissa Wen <mwen@igalia.com>
---
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 73 +------------------
 1 file changed, 4 insertions(+), 69 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 0ee453d2cd65..a710d0576edd 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -11935,9 +11935,6 @@ void amdgpu_dm_update_freesync_caps(struct drm_connector *connector,
 				    const struct drm_edid *drm_edid)
 {
 	int i = 0;
-	const struct detailed_timing *timing;
-	const struct detailed_non_pixel *data;
-	const struct detailed_data_monitor_range *range;
 	struct amdgpu_dm_connector *amdgpu_dm_connector =
 			to_amdgpu_dm_connector(connector);
 	struct dm_connector_state *dm_con_state = NULL;
@@ -11964,8 +11961,6 @@ void amdgpu_dm_update_freesync_caps(struct drm_connector *connector,
 
 		amdgpu_dm_connector->min_vfreq = 0;
 		amdgpu_dm_connector->max_vfreq = 0;
-		connector->display_info.monitor_range.min_vfreq = 0;
-		connector->display_info.monitor_range.max_vfreq = 0;
 		freesync_capable = false;
 
 		goto update;
@@ -11985,67 +11980,11 @@ void amdgpu_dm_update_freesync_caps(struct drm_connector *connector,
 
 	if (edid && (sink->sink_signal == SIGNAL_TYPE_DISPLAY_PORT ||
 		     sink->sink_signal == SIGNAL_TYPE_EDP)) {
-		bool edid_check_required = false;
-
-		if (amdgpu_dm_connector->dc_link &&
-		    amdgpu_dm_connector->dc_link->dpcd_caps.allow_invalid_MSA_timing_param) {
-			if (edid->features & DRM_EDID_FEATURE_CONTINUOUS_FREQ) {
-				amdgpu_dm_connector->min_vfreq = connector->display_info.monitor_range.min_vfreq;
-				amdgpu_dm_connector->max_vfreq = connector->display_info.monitor_range.max_vfreq;
-				if (amdgpu_dm_connector->max_vfreq -
-				    amdgpu_dm_connector->min_vfreq > 10)
-					freesync_capable = true;
-			} else {
-				edid_check_required = edid->version > 1 ||
-						      (edid->version == 1 &&
-						       edid->revision > 1);
-			}
-		}
-
-		if (edid_check_required) {
-			for (i = 0; i < 4; i++) {
-
-				timing	= &edid->detailed_timings[i];
-				data	= &timing->data.other_data;
-				range	= &data->data.range;
-				/*
-				 * Check if monitor has continuous frequency mode
-				 */
-				if (data->type != EDID_DETAIL_MONITOR_RANGE)
-					continue;
-				/*
-				 * Check for flag range limits only. If flag == 1 then
-				 * no additional timing information provided.
-				 * Default GTF, GTF Secondary curve and CVT are not
-				 * supported
-				 */
-				if (range->flags != 1)
-					continue;
-
-				connector->display_info.monitor_range.min_vfreq = range->min_vfreq;
-				connector->display_info.monitor_range.max_vfreq = range->max_vfreq;
-
-				if (edid->revision >= 4) {
-					if (data->pad2 & DRM_EDID_RANGE_OFFSET_MIN_VFREQ)
-						connector->display_info.monitor_range.min_vfreq += 255;
-					if (data->pad2 & DRM_EDID_RANGE_OFFSET_MAX_VFREQ)
-						connector->display_info.monitor_range.max_vfreq += 255;
-				}
-
-				amdgpu_dm_connector->min_vfreq =
-					connector->display_info.monitor_range.min_vfreq;
-				amdgpu_dm_connector->max_vfreq =
-					connector->display_info.monitor_range.max_vfreq;
-
-				break;
-			}
-
-			if (amdgpu_dm_connector->max_vfreq -
-			    amdgpu_dm_connector->min_vfreq > 10) {
+		amdgpu_dm_connector->min_vfreq = connector->display_info.monitor_range.min_vfreq;
+		amdgpu_dm_connector->max_vfreq = connector->display_info.monitor_range.max_vfreq;
+		if (amdgpu_dm_connector->max_vfreq - amdgpu_dm_connector->min_vfreq > 10)
+			freesync_capable = true;
 
-				freesync_capable = true;
-			}
-		}
 		parse_amd_vsdb(amdgpu_dm_connector, edid, &vsdb_info);
 
 		if (vsdb_info.replay_mode) {
@@ -12053,13 +11992,9 @@ void amdgpu_dm_update_freesync_caps(struct drm_connector *connector,
 			amdgpu_dm_connector->vsdb_info.amd_vsdb_version = vsdb_info.amd_vsdb_version;
 			amdgpu_dm_connector->as_type = ADAPTIVE_SYNC_TYPE_EDP;
 		}
-
 	} else if (drm_edid && sink->sink_signal == SIGNAL_TYPE_HDMI_TYPE_A) {
 		i = parse_hdmi_amd_vsdb(amdgpu_dm_connector, edid, &vsdb_info);
 		if (i >= 0 && vsdb_info.freesync_supported) {
-			timing  = &edid->detailed_timings[i];
-			data    = &timing->data.other_data;
-
 			amdgpu_dm_connector->min_vfreq = vsdb_info.min_refresh_rate_hz;
 			amdgpu_dm_connector->max_vfreq = vsdb_info.max_refresh_rate_hz;
 			if (amdgpu_dm_connector->max_vfreq - amdgpu_dm_connector->min_vfreq > 10)
-- 
2.43.0

[PATCH v5 5/9] drm/amd/display: use drm_edid_product_id for parsing EDID product info

[Melissa Wen]

Since [1], we can use drm_edid_product_id to get debug info from
drm_edid instead of directly parsing EDID.

[1] https://lore.kernel.org/dri-devel/cover.1712655867.git.jani.nikula@intel.com/

Signed-off-by: Melissa Wen <mwen@igalia.com>
---
 .../amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 37 ++++++++++---------
 1 file changed, 19 insertions(+), 18 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
index 2e07ce2e89f4..1e454cfcaef2 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
@@ -45,16 +45,15 @@
 #include "dm_helpers.h"
 #include "ddc_service_types.h"
 
-static u32 edid_extract_panel_id(struct edid *edid)
+static u32 edid_extract_panel_id(struct drm_edid_product_id *product_id)
 {
-	return (u32)edid->mfg_id[0] << 24   |
-	       (u32)edid->mfg_id[1] << 16   |
-	       (u32)EDID_PRODUCT_ID(edid);
+	return (u32)be16_to_cpu(product_id->manufacturer_name) << 16 |
+	       (u32)le16_to_cpu(product_id->product_code);
 }
 
-static void apply_edid_quirks(struct edid *edid, struct dc_edid_caps *edid_caps)
+static void apply_edid_quirks(struct drm_edid_product_id *product_id, struct dc_edid_caps *edid_caps)
 {
-	uint32_t panel_id = edid_extract_panel_id(edid);
+	uint32_t panel_id = edid_extract_panel_id(product_id);
 
 	switch (panel_id) {
 	/* Workaround for some monitors which does not work well with FAMS */
@@ -94,6 +93,8 @@ enum dc_edid_status dm_helpers_parse_edid_caps(
 {
 	struct amdgpu_dm_connector *aconnector = link->priv;
 	struct drm_connector *connector = &aconnector->base;
+	const struct drm_edid *drm_edid = aconnector->drm_edid;
+	struct drm_edid_product_id product_id;
 	struct edid *edid_buf = edid ? (struct edid *) edid->raw_edid : NULL;
 	struct cea_sad *sads;
 	int sad_count = -1;
@@ -109,13 +110,13 @@ enum dc_edid_status dm_helpers_parse_edid_caps(
 	if (!drm_edid_is_valid(edid_buf))
 		result = EDID_BAD_CHECKSUM;
 
-	edid_caps->manufacturer_id = (uint16_t) edid_buf->mfg_id[0] |
-					((uint16_t) edid_buf->mfg_id[1])<<8;
-	edid_caps->product_id = (uint16_t) edid_buf->prod_code[0] |
-					((uint16_t) edid_buf->prod_code[1])<<8;
-	edid_caps->serial_number = edid_buf->serial;
-	edid_caps->manufacture_week = edid_buf->mfg_week;
-	edid_caps->manufacture_year = edid_buf->mfg_year;
+	drm_edid_get_product_id(drm_edid, &product_id);
+
+	edid_caps->manufacturer_id = le16_to_cpu(product_id.manufacturer_name);
+	edid_caps->product_id = le16_to_cpu(product_id.product_code);
+	edid_caps->serial_number = le32_to_cpu(product_id.serial_number);
+	edid_caps->manufacture_week = product_id.week_of_manufacture;
+	edid_caps->manufacture_year = product_id.year_of_manufacture;
 
 	drm_edid_get_monitor_name(edid_buf,
 				  edid_caps->display_name,
@@ -123,7 +124,7 @@ enum dc_edid_status dm_helpers_parse_edid_caps(
 
 	edid_caps->edid_hdmi = connector->display_info.is_hdmi;
 
-	apply_edid_quirks(edid_buf, edid_caps);
+	apply_edid_quirks(&product_id, edid_caps);
 
 	sad_count = drm_edid_to_sad((struct edid *) edid->raw_edid, &sads);
 	if (sad_count <= 0)
@@ -909,9 +910,9 @@ enum dc_edid_status dm_helpers_read_local_edid(
 	 * do check sum and retry to make sure read correct edid.
 	 */
 	do {
-
 		drm_edid = drm_edid_read_ddc(connector, ddc);
 		drm_edid_connector_update(connector, drm_edid);
+		aconnector->drm_edid = drm_edid;
 
 		/* DP Compliance Test 4.2.2.6 */
 		if (link->aux_mode && connector->edid_corrupt)
@@ -929,14 +930,14 @@ enum dc_edid_status dm_helpers_read_local_edid(
 		sink->dc_edid.length = EDID_LENGTH * (edid->extensions + 1);
 		memmove(sink->dc_edid.raw_edid, (uint8_t *)edid, sink->dc_edid.length);
 
-		/* We don't need the original edid anymore */
-		drm_edid_free(drm_edid);
-
 		edid_status = dm_helpers_parse_edid_caps(
 						link,
 						&sink->dc_edid,
 						&sink->edid_caps);
 
+		/* We don't need the original edid anymore */
+		drm_edid_free(drm_edid);
+
 	} while (edid_status == EDID_BAD_CHECKSUM && --retry > 0);
 
 	if (edid_status != EDID_OK)
-- 
2.43.0

[PATCH v5 6/9] drm/amd/display: parse display name from drm_eld

[Melissa Wen]

We don't need to parse dc_edid to get the display name since it's
already set in drm_eld which in turn had it values updated when updating
connector with the opaque drm_edid.

Signed-off-by: Melissa Wen <mwen@igalia.com>
---
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c  | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
index 1e454cfcaef2..89ffd36dafd3 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
@@ -32,7 +32,7 @@
 #include <drm/amdgpu_drm.h>
 #include <drm/drm_edid.h>
 #include <drm/drm_fixed.h>
-
+#include <drm/drm_eld.h>
 #include "dm_services.h"
 #include "amdgpu.h"
 #include "dc.h"
@@ -77,6 +77,7 @@ static void apply_edid_quirks(struct drm_edid_product_id *product_id, struct dc_
 	}
 }
 
+#define AMDGPU_ELD_DISPLAY_NAME_SIZE_IN_CHARS 13
 /**
  * dm_helpers_parse_edid_caps() - Parse edid caps
  *
@@ -118,9 +119,10 @@ enum dc_edid_status dm_helpers_parse_edid_caps(
 	edid_caps->manufacture_week = product_id.week_of_manufacture;
 	edid_caps->manufacture_year = product_id.year_of_manufacture;
 
-	drm_edid_get_monitor_name(edid_buf,
-				  edid_caps->display_name,
-				  AUDIO_INFO_DISPLAY_NAME_SIZE_IN_CHARS);
+	memset(edid_caps->display_name, 0, AUDIO_INFO_DISPLAY_NAME_SIZE_IN_CHARS);
+	memcpy(edid_caps->display_name,
+	       &connector->eld[DRM_ELD_MONITOR_NAME_STRING],
+	       AMDGPU_ELD_DISPLAY_NAME_SIZE_IN_CHARS);
 
 	edid_caps->edid_hdmi = connector->display_info.is_hdmi;
 
-- 
2.43.0

[PATCH v5 7/9] drm/amd/display: get SAD from drm_eld when parsing EDID caps

[Melissa Wen]

drm_edid_connector_update() updates display info, filling ELD with audio
info from Short-Audio Descriptors in the last step of
update_dislay_info(). Our goal is stopping using raw edid, so we can
extract SAD from drm_eld instead of access raw edid to get audio caps.

v5:
- squash with `don't give initial values for sad/b_count` (Alex H)
- add more informative commit description (Alex H)

Signed-off-by: Melissa Wen <mwen@igalia.com>
---
 .../amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 20 +++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
index 89ffd36dafd3..036bc5423c12 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
@@ -97,9 +97,7 @@ enum dc_edid_status dm_helpers_parse_edid_caps(
 	const struct drm_edid *drm_edid = aconnector->drm_edid;
 	struct drm_edid_product_id product_id;
 	struct edid *edid_buf = edid ? (struct edid *) edid->raw_edid : NULL;
-	struct cea_sad *sads;
-	int sad_count = -1;
-	int sadb_count = -1;
+	int sad_count, sadb_count;
 	int i = 0;
 	uint8_t *sadb = NULL;
 
@@ -128,18 +126,21 @@ enum dc_edid_status dm_helpers_parse_edid_caps(
 
 	apply_edid_quirks(&product_id, edid_caps);
 
-	sad_count = drm_edid_to_sad((struct edid *) edid->raw_edid, &sads);
+	sad_count = drm_eld_sad_count(connector->eld);
 	if (sad_count <= 0)
 		return result;
 
 	edid_caps->audio_mode_count = min(sad_count, DC_MAX_AUDIO_DESC_COUNT);
 	for (i = 0; i < edid_caps->audio_mode_count; ++i) {
-		struct cea_sad *sad = &sads[i];
+		struct cea_sad sad;
 
-		edid_caps->audio_modes[i].format_code = sad->format;
-		edid_caps->audio_modes[i].channel_count = sad->channels + 1;
-		edid_caps->audio_modes[i].sample_rate = sad->freq;
-		edid_caps->audio_modes[i].sample_size = sad->byte2;
+		if (drm_eld_sad_get(connector->eld, i, &sad) < 0)
+			continue;
+
+		edid_caps->audio_modes[i].format_code = sad.format;
+		edid_caps->audio_modes[i].channel_count = sad.channels + 1;
+		edid_caps->audio_modes[i].sample_rate = sad.freq;
+		edid_caps->audio_modes[i].sample_size = sad.byte2;
 	}
 
 	sadb_count = drm_edid_to_speaker_allocation((struct edid *) edid->raw_edid, &sadb);
@@ -154,7 +155,6 @@ enum dc_edid_status dm_helpers_parse_edid_caps(
 	else
 		edid_caps->speaker_flags = DEFAULT_SPEAKER_LOCATION;
 
-	kfree(sads);
 	kfree(sadb);
 
 	return result;
-- 
2.43.0

[PATCH v5 8/9] drm/amd/display: get SADB from drm_eld when parsing EDID caps

[Melissa Wen]

drm_edid_connector_update() updates display info, filling ELD with
speaker allocation data in the last step of update_dislay_info(). Our
goal is stopping using raw edid, so we can extract SADB from drm_eld
instead of access raw edid to get audio caps.

v5: add more informative commit description (Alex H)

Signed-off-by: Melissa Wen <mwen@igalia.com>
---
 .../drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 15 +++------------
 1 file changed, 3 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
index 036bc5423c12..e785b1e3277b 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
@@ -97,9 +97,8 @@ enum dc_edid_status dm_helpers_parse_edid_caps(
 	const struct drm_edid *drm_edid = aconnector->drm_edid;
 	struct drm_edid_product_id product_id;
 	struct edid *edid_buf = edid ? (struct edid *) edid->raw_edid : NULL;
-	int sad_count, sadb_count;
+	int sad_count;
 	int i = 0;
-	uint8_t *sadb = NULL;
 
 	enum dc_edid_status result = EDID_OK;
 
@@ -143,20 +142,12 @@ enum dc_edid_status dm_helpers_parse_edid_caps(
 		edid_caps->audio_modes[i].sample_size = sad.byte2;
 	}
 
-	sadb_count = drm_edid_to_speaker_allocation((struct edid *) edid->raw_edid, &sadb);
 
-	if (sadb_count < 0) {
-		DRM_ERROR("Couldn't read Speaker Allocation Data Block: %d\n", sadb_count);
-		sadb_count = 0;
-	}
-
-	if (sadb_count)
-		edid_caps->speaker_flags = sadb[0];
+	if (connector->eld[DRM_ELD_SPEAKER])
+		edid_caps->speaker_flags = connector->eld[DRM_ELD_SPEAKER];
 	else
 		edid_caps->speaker_flags = DEFAULT_SPEAKER_LOCATION;
 
-	kfree(sadb);
-
 	return result;
 }
 
-- 
2.43.0

[PATCH v5 9/9] drm/amd/display: remove dc_edid handler from dm_helpers_parse_edid_caps

[Melissa Wen]

We can parse edid caps from drm_edid and drm_eld and any calls of
dm_helpers_parse_edid_caps is made in a state that we have drm_edid set
to amdgpu connector.

v5: also remove the parameter from kernel-doc (kernel test bot)

Signed-off-by: Melissa Wen <mwen@igalia.com>
---
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c |  5 +--
 .../amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 32 ++++++++-----------
 drivers/gpu/drm/amd/display/dc/dm_helpers.h   |  1 -
 .../drm/amd/display/dc/link/link_detection.c  |  6 ++--
 4 files changed, 17 insertions(+), 27 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index a710d0576edd..e75d7e58df16 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -7030,10 +7030,7 @@ static void amdgpu_dm_connector_funcs_force(struct drm_connector *connector)
 		memset(&dc_em_sink->edid_caps, 0, sizeof(struct dc_edid_caps));
 		memmove(dc_em_sink->dc_edid.raw_edid, edid,
 			(edid->extensions + 1) * EDID_LENGTH);
-		dm_helpers_parse_edid_caps(
-			dc_link,
-			&dc_em_sink->dc_edid,
-			&dc_em_sink->edid_caps);
+		dm_helpers_parse_edid_caps(dc_link, &dc_em_sink->edid_caps);
 	}
 }
 
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
index e785b1e3277b..87b19c50ee55 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
@@ -82,32 +82,24 @@ static void apply_edid_quirks(struct drm_edid_product_id *product_id, struct dc_
  * dm_helpers_parse_edid_caps() - Parse edid caps
  *
  * @link: current detected link
- * @edid:	[in] pointer to edid
  * @edid_caps:	[in] pointer to edid caps
  *
  * Return: void
  */
-enum dc_edid_status dm_helpers_parse_edid_caps(
-		struct dc_link *link,
-		const struct dc_edid *edid,
-		struct dc_edid_caps *edid_caps)
+enum dc_edid_status dm_helpers_parse_edid_caps(struct dc_link *link,
+					       struct dc_edid_caps *edid_caps)
 {
 	struct amdgpu_dm_connector *aconnector = link->priv;
 	struct drm_connector *connector = &aconnector->base;
 	const struct drm_edid *drm_edid = aconnector->drm_edid;
 	struct drm_edid_product_id product_id;
-	struct edid *edid_buf = edid ? (struct edid *) edid->raw_edid : NULL;
 	int sad_count;
 	int i = 0;
-
 	enum dc_edid_status result = EDID_OK;
 
-	if (!edid_caps || !edid)
+	if (!edid_caps || !drm_edid)
 		return EDID_BAD_INPUT;
 
-	if (!drm_edid_is_valid(edid_buf))
-		result = EDID_BAD_CHECKSUM;
-
 	drm_edid_get_product_id(drm_edid, &product_id);
 
 	edid_caps->manufacturer_id = le16_to_cpu(product_id.manufacturer_name);
@@ -919,19 +911,23 @@ enum dc_edid_status dm_helpers_read_local_edid(
 		if (!drm_edid)
 			return EDID_NO_RESPONSE;
 
-		edid = drm_edid_raw(drm_edid); // FIXME: Get rid of drm_edid_raw()
+		/* FIXME: Get rid of drm_edid_raw()
+		 * Raw edid is still needed for dm_helpers_dp_write_dpcd()
+		 */
+		edid = drm_edid_raw(drm_edid);
 		sink->dc_edid.length = EDID_LENGTH * (edid->extensions + 1);
 		memmove(sink->dc_edid.raw_edid, (uint8_t *)edid, sink->dc_edid.length);
 
 		edid_status = dm_helpers_parse_edid_caps(
 						link,
-						&sink->dc_edid,
 						&sink->edid_caps);
 
-		/* We don't need the original edid anymore */
-		drm_edid_free(drm_edid);
-
-	} while (edid_status == EDID_BAD_CHECKSUM && --retry > 0);
+		if (edid_status != EDID_OK) {
+			/* We can discard the drm_edid and retry */
+			drm_edid_free(drm_edid);
+			drm_edid_connector_update(connector, drm_edid);
+		}
+	} while (edid_status != EDID_OK && --retry > 0);
 
 	if (edid_status != EDID_OK)
 		DRM_ERROR("EDID err: %d, on connector: %s",
@@ -1294,4 +1290,4 @@ bool dm_helpers_is_hdr_on(struct dc_context *ctx, struct dc_stream_state *stream
 {
 	// TODO
 	return false;
-}
\ No newline at end of file
+}
diff --git a/drivers/gpu/drm/amd/display/dc/dm_helpers.h b/drivers/gpu/drm/amd/display/dc/dm_helpers.h
index 2e4a46f1b499..4e1776b5f0d4 100644
--- a/drivers/gpu/drm/amd/display/dc/dm_helpers.h
+++ b/drivers/gpu/drm/amd/display/dc/dm_helpers.h
@@ -61,7 +61,6 @@ void dm_helpers_free_gpu_mem(
 
 enum dc_edid_status dm_helpers_parse_edid_caps(
 	struct dc_link *link,
-	const struct dc_edid *edid,
 	struct dc_edid_caps *edid_caps);
 
 
diff --git a/drivers/gpu/drm/amd/display/dc/link/link_detection.c b/drivers/gpu/drm/amd/display/dc/link/link_detection.c
index 391dbe81534d..5fdd3e7da54e 100644
--- a/drivers/gpu/drm/amd/display/dc/link/link_detection.c
+++ b/drivers/gpu/drm/amd/display/dc/link/link_detection.c
@@ -1414,10 +1414,8 @@ struct dc_sink *link_add_remote_sink(
 			dc_sink))
 		goto fail_add_sink;
 
-	edid_status = dm_helpers_parse_edid_caps(
-			link,
-			&dc_sink->dc_edid,
-			&dc_sink->edid_caps);
+	edid_status = dm_helpers_parse_edid_caps(link,
+						 &dc_sink->edid_caps);
 
 	/*
 	 * Treat device as no EDID device if EDID
-- 
2.43.0

Re: [PATCH v5 0/9] drm/amd/display: switch amdgpu_dm_connector to use struct drm_edid

[Jani Nikula]

On Wed, 07 Aug 2024, Melissa Wen <mwen@igalia.com> wrote:
> Here AMD display driver migrates from open struct edid to opaque
> drm_edid. This version works on top of amd/drm-next branch since
> amd-staging-drm-next doesn't have the commits that support
> drm_edid_product_id[1]. It's mostly addressing Alex Hung's feedback
> from the previous version.

FWIW, I glanced through this and didn't spot anything out of the
ordinary. That said, I also didn't do detailed review of it, so I'm not
providing my R-b.

BR,
Jani.


-- 
Jani Nikula, Intel