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

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commit d6149086b4 upstream.

This change causes regression when eDP and external display in mirror
mode. When external display supports low resolution than eDP, use eDP
timing to driver external display may cause corruption on external
display.

This reverts commit e749dd10e5.

Cc: stable@vger.kernel.org
Link: https://gitlab.freedesktop.org/drm/amd/-/issues/2655
Signed-off-by: Hersen Wu <hersenxs.wu@amd.com>
Reviewed-by: Mario Limonciello <mario.limonciello@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 2023-06-26 13:40:58 -04:00 • committed by Justin Hammond
parent d41b848c35
commit 0b4faf02ff
1 changed files with 1 additions and 7 deletions
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8
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@ -8209,13 +8209,7 @@ 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);
/* 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_common_modes(encoder, connector);
amdgpu_dm_connector_add_freesync_modes(connector, edid);
}
amdgpu_dm_fbc_init(connector);