diff options
| author | Roman Li <Roman.Li@amd.com> | 2026-05-20 16:50:34 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2026-06-17 18:09:23 -0400 |
| commit | fe7945d092a1d3c340febc2ab176cee50d0f6c80 (patch) | |
| tree | cfd9621475019fe80a1bec0e7e750fc9c08a54e0 | |
| parent | b29aaf0a72222bfafe4d73899dadb0486b5bcb09 (diff) | |
drm/amd/display: Skip PHY SSC reduction on some 8K panels
[Why]
Some 8K displays cannot tolerate the reduced phy ssc value
at high link utilization and show corruption or black screen.
[How]
Add an EDID panel-id quirk to utilize existing skip_phy_ssc_reduction flag.
To pass the link into the quirk handler, change the signature of
apply_edid_quirks() to take link as an argument. The dev local in
dm_helpers_parse_edid_caps() becomes unused and is removed.
Fixes: 5fa62c87cffd ("drm/amd/display: Add option to disable PHY SSC reduction on transmitter enable")
Reviewed-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Roman Li <Roman.Li@amd.com>
Signed-off-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 144169e7be0831e09958a906d08d1856751aa6c6)
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 13 |
1 files changed, 10 insertions, 3 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 f257ea91a34d..c6f94eb71ffa 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 @@ -95,8 +95,11 @@ static u32 edid_extract_panel_id(struct edid *edid) (u32)EDID_PRODUCT_ID(edid); } -static void apply_edid_quirks(struct drm_device *dev, struct edid *edid, struct dc_edid_caps *edid_caps) +static void apply_edid_quirks(struct dc_link *link, struct edid *edid, + struct dc_edid_caps *edid_caps) { + struct amdgpu_dm_connector *aconnector = link->priv; + struct drm_device *dev = aconnector->base.dev; uint32_t panel_id = edid_extract_panel_id(edid); switch (panel_id) { @@ -126,6 +129,11 @@ static void apply_edid_quirks(struct drm_device *dev, struct edid *edid, struct drm_dbg_driver(dev, "Disabling VSC on monitor with panel id %X\n", panel_id); edid_caps->panel_patch.disable_colorimetry = true; break; + /* Workaround for monitors that get corrupted by the PHY SSC reduction */ + case drm_edid_encode_panel_id('D', 'E', 'L', 0x4147): + drm_dbg_driver(dev, "Skip PHY SSC reduction on panel id %X\n", panel_id); + link->wa_flags.skip_phy_ssc_reduction = true; + break; default: return; } @@ -147,7 +155,6 @@ enum dc_edid_status dm_helpers_parse_edid_caps( { struct amdgpu_dm_connector *aconnector = link->priv; struct drm_connector *connector = &aconnector->base; - struct drm_device *dev = connector->dev; struct edid *edid_buf = edid ? (struct edid *) edid->raw_edid : NULL; struct cea_sad *sads; int sad_count = -1; @@ -188,7 +195,7 @@ enum dc_edid_status dm_helpers_parse_edid_caps( edid_caps->frl_dsc_max_frl_rate, edid_caps->frl_dsc_total_chunk_kbytes); } - apply_edid_quirks(dev, edid_buf, edid_caps); + apply_edid_quirks(link, edid_buf, edid_caps); sad_count = drm_edid_to_sad((struct edid *) edid->raw_edid, &sads); if (sad_count <= 0) |