From: Jakob Bornecrantz jakob@vmware.com
This fixes kernel panics when running the vbltest from the drm repo. We can't just skip initializing the vblank system since it sets up certain state for us, see: "vmwgfx: Enable use of the vblank system."
Signed-off-by: Jakob Bornecrantz jakob@vmware.com Signed-off-by: Thomas Hellstrom thellstrom@vmware.com --- drivers/gpu/drm/vmwgfx/vmwgfx_drv.c | 2 ++ drivers/gpu/drm/vmwgfx/vmwgfx_drv.h | 2 ++ drivers/gpu/drm/vmwgfx/vmwgfx_kms.c | 19 +++++++++++++++++++ 3 files changed, 23 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c index e07dcf4..b8eb8cd 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c @@ -1069,6 +1069,8 @@ static struct drm_driver driver = { .irq_uninstall = vmw_irq_uninstall, .irq_handler = vmw_irq_handler, .get_vblank_counter = vmw_get_vblank_counter, + .enable_vblank = vmw_enable_vblank, + .disable_vblank = vmw_disable_vblank, .reclaim_buffers_locked = NULL, .ioctls = vmw_ioctls, .num_ioctls = DRM_ARRAY_SIZE(vmw_ioctls), diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h index 0e9b2ce..30589d0 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h @@ -618,6 +618,8 @@ bool vmw_kms_validate_mode_vram(struct vmw_private *dev_priv, uint32_t pitch, uint32_t height); u32 vmw_get_vblank_counter(struct drm_device *dev, int crtc); +int vmw_enable_vblank(struct drm_device *dev, int crtc); +void vmw_disable_vblank(struct drm_device *dev, int crtc); int vmw_kms_present(struct vmw_private *dev_priv, struct drm_file *file_priv, struct vmw_framebuffer *vfb, diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c index 2421d0c..39b99db 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c @@ -1459,11 +1459,30 @@ bool vmw_kms_validate_mode_vram(struct vmw_private *dev_priv, return ((u64) pitch * (u64) height) < (u64) dev_priv->vram_size; }
+ +/** + * Function called by DRM code called with vbl_lock held. + */ u32 vmw_get_vblank_counter(struct drm_device *dev, int crtc) { return 0; }
+/** + * Function called by DRM code called with vbl_lock held. + */ +int vmw_enable_vblank(struct drm_device *dev, int crtc) +{ + return -ENOSYS; +} + +/** + * Function called by DRM code called with vbl_lock held. + */ +void vmw_disable_vblank(struct drm_device *dev, int crtc) +{ +} +
/* * Small shared kms functions.