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drm/vmwgfx: Fix black screen and device errors when running without fbdev

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When we are running without fbdev, transitioning from the login screen to
X or gnome-shell/wayland will cause a vt switch and the driver will disable
svga mode, losing all modesetting resources. However, the kms atomic state
does not reflect that and may think that a crtc is still turned on, which
will cause device errors when we try to bind an fb to the crtc, and the
screen will remain black.

Fix this by turning off all kms resources before disabling svga mode.

Cc: <stable@vger.kernel.org>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
This commit is contained in:
Thomas Hellstrom
2018-03-08 10:07:37 +01:00
parent 93dfdf9fde
commit 140bcaa23a
4 changed files with 25 additions and 1 deletions
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1
drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
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@@ -938,6 +938,7 @@ int vmw_kms_present(struct vmw_private *dev_priv,
int vmw_kms_update_layout_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv);
void vmw_kms_legacy_hotspot_clear(struct vmw_private *dev_priv);
void vmw_kms_lost_device(struct drm_device *dev);
int vmw_dumb_create(struct drm_file *file_priv,
struct drm_device *dev,