redonkable/alistair23-linux
redonkable/alistair23-linux
1
0
Fork 0
Code Releases Activity

drm/vc4: Add a getparam to signal support for branches.

Browse source 
Userspace needs to know if it can create shaders that do branching.
Otherwise, for backwards compatibility with old kernels it needs to
lower if statements to conditional assignments.

Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Eric Anholt 2016-07-02 14:14:27 -07:00
parent 6d45c81d22
commit 7363cee5b4
2 changed files with 4 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
drivers/gpu/drm/vc4/vc4_drv.c
View file

@ -76,6 +76,9 @@ static int vc4_get_param_ioctl(struct drm_device *dev, void *data,
args->value = V3D_READ(V3D_IDENT2);
pm_runtime_put(&vc4->v3d->pdev->dev);
break;
case DRM_VC4_PARAM_SUPPORTS_BRANCHES:
args->value = true;
break;
default:
DRM_DEBUG("Unknown parameter %d\n", args->param);
return -EINVAL;

1
include/uapi/drm/vc4_drm.h
View file

@ -285,6 +285,7 @@ struct drm_vc4_get_hang_state {
#define DRM_VC4_PARAM_V3D_IDENT0 0
#define DRM_VC4_PARAM_V3D_IDENT1 1
#define DRM_VC4_PARAM_V3D_IDENT2 2
#define DRM_VC4_PARAM_SUPPORTS_BRANCHES 3
struct drm_vc4_get_param {
__u32 param;