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drm/amd: Re-enable common modes for eDP and LVDS

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[Why]
Although compositors will add their own modes, Xorg won't use it's own
modes and will only stick to modes advertised by the driver. This mean a
user that used to pick 1024x768 could no longer access it unless the
panel's native resolution was 1024x768.

[How]
Revert commit 6d396e7ac1 ("drm/amd/display: Disable common modes for
LVDS") and commit 7948afb46a ("drm/amd/display: Disable common modes
for eDP").

The panel will still use scaling for any non-native modes due to
commit 978fa2f6d0 ("drm/amd/display: Use scaling for non-native
resolutions on eDP")

Reported-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4538
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Link: https://lore.kernel.org/r/20250828140856.2887993-1-superm1@kernel.org
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit c2fbf72fe3)
This commit is contained in:
Mario Limonciello
2025-08-28 09:37:05 -05:00
committed by Alex Deucher
parent 5171848bdf
commit a8b79b0918
1 changed files with 1 additions and 2 deletions
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3
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@@ -8381,8 +8381,7 @@ static int amdgpu_dm_connector_get_modes(struct drm_connector *connector)
drm_add_modes_noedid(connector, 1920, 1080);
} else {
amdgpu_dm_connector_ddc_get_modes(connector, drm_edid);
if (encoder && (connector->connector_type != DRM_MODE_CONNECTOR_eDP) &&
(connector->connector_type != DRM_MODE_CONNECTOR_LVDS))
if (encoder)
amdgpu_dm_connector_add_common_modes(encoder, connector);
amdgpu_dm_connector_add_freesync_modes(connector, drm_edid);
}