[06/13] drm/amd/display: get SADB from drm_eld when parsing EDID caps

Commit Message

Melissa Wen April 11, 2025, 8:08 p.m. UTC

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.

Signed-off-by: Melissa Wen <[e-mail]>
---
 .../amd/display/amdgpu_dm/amdgpu_dm_helpers.c    | 16 +++-------------
 1 file changed, 3 insertions(+), 13 deletions(-)

Patch

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 ca9fe423e18e..a96f527a59df 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
@@ -106,10 +106,8 @@  enum dc_edid_status dm_helpers_parse_edid_caps(
 	struct edid *edid_buf = edid ? (struct edid *) edid->raw_edid : NULL;
 	const struct drm_edid *drm_edid;
 	struct drm_edid_product_id product_id;
-	int sad_count, sadb_count;
+	int sad_count;
 	int i = 0;
-	uint8_t *sadb = NULL;
-
 	enum dc_edid_status result = EDID_OK;
 
 	if (!edid_caps || !edid)
@@ -157,19 +155,11 @@  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);
 	drm_edid_free(drm_edid);
 
 	return result;