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drm/nouveau/disp: Revert a NULL check inside nouveau_connector_get_modes

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commit d5712cd22b upstream.

The original commit adding that check tried to protect the kenrel against
a potential invalid NULL pointer access.

However we call nouveau_connector_detect_depth once without a native_mode
set on purpose for non LVDS connectors and this broke DP support in a few
cases.

Cc: Olaf Skibbe <news@kravcenko.com>
Cc: Lyude Paul <lyude@redhat.com>
Closes: https://gitlab.freedesktop.org/drm/nouveau/-/issues/238
Closes: https://gitlab.freedesktop.org/drm/nouveau/-/issues/245
Fixes: 20a2ce87fb ("drm/nouveau/dp: check for NULL nv_connector->native_mode")
Signed-off-by: Karol Herbst <kherbst@redhat.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230805101813.2603989-1-kherbst@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Karol Herbst 2023-08-05 12:18:13 +02:00 committed by Greg Kroah-Hartman
parent 4c6767c8bf
commit b8b8db5857
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/nouveau/nouveau_connector.c
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@ -966,7 +966,7 @@ nouveau_connector_get_modes(struct drm_connector *connector)
/* Determine display colour depth for everything except LVDS now,
* DP requires this before mode_valid() is called.
*/
if (connector->connector_type != DRM_MODE_CONNECTOR_LVDS && nv_connector->native_mode)
if (connector->connector_type != DRM_MODE_CONNECTOR_LVDS)
nouveau_connector_detect_depth(connector);
/* Find the native mode if this is a digital panel, if we didn't