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drm/amd/display: edp do not add non-edid timings

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commit e749dd10e5 upstream.

[Why] most edp support only timings from edid. applying
non-edid timings, especially those timings out of edp
bandwidth, may damage edp.

[How] do not add non-edid timings for edp.

Cc: Mario Limonciello <mario.limonciello@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Acked-by: Stylon Wang <stylon.wang@amd.com>
Signed-off-by: Hersen Wu <hersenxs.wu@amd.com>
Reviewed-by: Roman Li <roman.li@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Hersen Wu 2023-05-25 08:37:40 -04:00 • committed by Justin Hammond
parent 3e49bc4d3b
commit d84e5b451a
1 changed files with 7 additions and 1 deletions
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8
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
View file

@ -8177,7 +8177,13 @@ static int amdgpu_dm_connector_get_modes(struct drm_connector *connector)
drm_add_modes_noedid(connector, 640, 480);
} else {
amdgpu_dm_connector_ddc_get_modes(connector, edid);
amdgpu_dm_connector_add_common_modes(encoder, connector);
/* most eDP supports only timings from its edid,
* usually only detailed timings are available
* from eDP edid. timings which are not from edid
* may damage eDP
*/
if (connector->connector_type != DRM_MODE_CONNECTOR_eDP)
amdgpu_dm_connector_add_common_modes(encoder, connector);
amdgpu_dm_connector_add_freesync_modes(connector, edid);
}
amdgpu_dm_fbc_init(connector);