6.7-stable review patch. If anyone has any objections, please let me know.
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From: Ryan Lin tsung-hua.lin@amd.com
commit b7cdccc6a849568775f738b1e233f751a8fed013 upstream.
[WHY] Some eDP panels' ext caps don't write initial values. The value of dpcd_addr (0x317) can be random and the backlight control interface will be incorrect.
[HOW] Add new panel patches to remove sink ext caps.
Cc: Mario Limonciello mario.limonciello@amd.com Cc: Alex Deucher alexander.deucher@amd.com Cc: stable@vger.kernel.org # 6.5.x Cc: Tsung-hua Lin tsung-hua.lin@amd.com Cc: Chris Chi moukong.chi@amd.com Reviewed-by: Wayne Lin wayne.lin@amd.com Acked-by: Alex Hung alex.hung@amd.com Signed-off-by: Ryan Lin tsung-hua.lin@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c @@ -66,6 +66,8 @@ static void apply_edid_quirks(struct edi /* Workaround for some monitors that do not clear DPCD 0x317 if FreeSync is unsupported */ case drm_edid_encode_panel_id('A', 'U', 'O', 0xA7AB): case drm_edid_encode_panel_id('A', 'U', 'O', 0xE69B): + case drm_edid_encode_panel_id('B', 'O', 'E', 0x092A): + case drm_edid_encode_panel_id('L', 'G', 'D', 0x06D1): DRM_DEBUG_DRIVER("Clearing DPCD 0x317 on monitor with panel id %X\n", panel_id); edid_caps->panel_patch.remove_sink_ext_caps = true; break; @@ -119,6 +121,8 @@ enum dc_edid_status dm_helpers_parse_edi
edid_caps->edid_hdmi = connector->display_info.is_hdmi;
+ apply_edid_quirks(edid_buf, edid_caps); + sad_count = drm_edid_to_sad((struct edid *) edid->raw_edid, &sads); if (sad_count <= 0) return result; @@ -145,8 +149,6 @@ enum dc_edid_status dm_helpers_parse_edi else edid_caps->speaker_flags = DEFAULT_SPEAKER_LOCATION;
- apply_edid_quirks(edid_buf, edid_caps); - kfree(sads); kfree(sadb);