On 2024-02-27 13:18, Rodrigo Siqueira wrote: > From: Ivan Lipski <ivlipski@xxxxxxx> > > [WHY] > Some eDP panels's ext caps don't write initial value cause the value of > dpcd_addr(0x317) is random. It means that sometimes the eDP will > clarify it is OLED, miniLED...etc cause the backlight control interface > is incorrect. > > [HOW] > Add a new panel patch to remove sink ext caps(HDR,OLED...etc) > > Cc: stable@xxxxxxxxxxxxxxx # 6.5.x > Cc: Hamza Mahfooz <hamza.mahfooz@xxxxxxx> > Cc: Tsung-hua Lin <tsung-hua.lin@xxxxxxx> > Cc: Chris Chi <moukong.chi@xxxxxxx> > Cc: Harry Wentland <Harry.Wentland@xxxxxxx> > Tested-by: Daniel Wheeler <daniel.wheeler@xxxxxxx> > Reviewed-by: Sun peng Li <sunpeng.li@xxxxxxx> > Acked-by: Rodrigo Siqueira <rodrigo.siqueira@xxxxxxx> > Signed-off-by: Ivan Lipski <ivlipski@xxxxxxx> Acked-by: Harry Wentland <harry.wentland@xxxxxxx> Harry > --- > drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 6 ++++++ > 1 file changed, 6 insertions(+) > > 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 d9a482908380..764dc3ffd91b 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 > @@ -63,6 +63,12 @@ static void apply_edid_quirks(struct edid *edid, struct dc_edid_caps *edid_caps) > DRM_DEBUG_DRIVER("Disabling FAMS on monitor with panel id %X\n", panel_id); > edid_caps->panel_patch.disable_fams = true; > break; > + /* 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): > + 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; > default: > return; > }