diff options
| author | Jakob Bornecrantz | 2011-10-04 20:13:14 +0200 |
|---|---|---|
| committer | Dave Airlie | 2011-10-05 11:17:09 +0200 |
| commit | 497a3ff9877424108020c7091c7886b364c0486e (patch) | |
| tree | 5032eaa3c8b47b9f049c9fe4b08c46b9ef9c572e /drivers/gpu/drm/vmwgfx/vmwgfx_kms.c | |
| parent | vmwgfx: Document vmw_fifo_reserve (diff) | |
| download | kernel-qcow2-linux-497a3ff9877424108020c7091c7886b364c0486e.tar.gz kernel-qcow2-linux-497a3ff9877424108020c7091c7886b364c0486e.tar.xz kernel-qcow2-linux-497a3ff9877424108020c7091c7886b364c0486e.zip | |
vmwgfx: Add comments for buffer pinning code
Signed-off-by: Jakob Bornecrantz <jakob@vmware.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/vmwgfx/vmwgfx_kms.c')
| -rw-r--r-- | drivers/gpu/drm/vmwgfx/vmwgfx_kms.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c index 1a4c84cecca7..c14eb764e096 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c @@ -706,6 +706,10 @@ static struct drm_framebuffer_funcs vmw_framebuffer_dmabuf_funcs = { .create_handle = vmw_framebuffer_create_handle, }; +/** + * We need to reserve the start of vram because the host might + * scribble to it at mode changes, so we need to reserve it. + */ static int vmw_surface_dmabuf_pin(struct vmw_framebuffer *vfb) { struct vmw_private *dev_priv = vmw_priv(vfb->base.dev); @@ -729,6 +733,9 @@ static int vmw_surface_dmabuf_pin(struct vmw_framebuffer *vfb) return ret; } +/** + * See vmw_surface_dmabuf_pin. + */ static int vmw_surface_dmabuf_unpin(struct vmw_framebuffer *vfb) { struct ttm_buffer_object *bo; @@ -745,6 +752,9 @@ static int vmw_surface_dmabuf_unpin(struct vmw_framebuffer *vfb) return 0; } +/** + * Pin the dmabuffer to the start of vram. + */ static int vmw_framebuffer_dmabuf_pin(struct vmw_framebuffer *vfb) { struct vmw_private *dev_priv = vmw_priv(vfb->base.dev); |