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| author | Paul Hsieh <paul.hsieh@amd.com> | 2023-10-25 10:53:35 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2023-11-17 00:51:35 -0500 |
| commit | 923bbfe6c888812db1088d684bd30c24036226d2 (patch) | |
| tree | 3b81373165f1b117ec8f3379b868e28f3efcabd4 /drivers/gpu/drm/amd/display/dc/link | |
| parent | 435f5b369657cffee4b04db1f5805b48599f4dbe (diff) | |
| download | linux-stable-923bbfe6c888812db1088d684bd30c24036226d2.tar.gz linux-stable-923bbfe6c888812db1088d684bd30c24036226d2.tar.bz2 linux-stable-923bbfe6c888812db1088d684bd30c24036226d2.zip | |
drm/amd/display: Clear dpcd_sink_ext_caps if not set
[WHY]
Some eDP panels' ext caps don't set initial values
and the value of dpcd_addr (0x317) is random.
It means that sometimes the eDP can be OLED, miniLED and etc,
and cause incorrect backlight control interface.
[HOW]
Add remove_sink_ext_caps to remove sink ext caps (HDR, OLED and etc)
Cc: Mario Limonciello <mario.limonciello@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Reviewed-by: Anthony Koo <anthony.koo@amd.com>
Acked-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Paul Hsieh <paul.hsieh@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/link')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/link/link_detection.c | 3 |
1 files changed, 3 insertions, 0 deletions
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 d6f0f857c05a..f2fe523f914f 100644 --- a/drivers/gpu/drm/amd/display/dc/link/link_detection.c +++ b/drivers/gpu/drm/amd/display/dc/link/link_detection.c @@ -1088,6 +1088,9 @@ static bool detect_link_and_local_sink(struct dc_link *link, if (sink->edid_caps.panel_patch.skip_scdc_overwrite) link->ctx->dc->debug.hdmi20_disable = true; + if (sink->edid_caps.panel_patch.remove_sink_ext_caps) + link->dpcd_sink_ext_caps.raw = 0; + if (dc_is_hdmi_signal(link->connector_signal)) read_scdc_caps(link->ddc, link->local_sink); |