Ping series review
On Wed, 2018-08-08 at 17:15 -0700, José Roberto de Souza wrote:
> GPU accelerators usually don't have display block or the display
> driver part can be disabled when building driver(for servers it saves
> some resources) so it is important let userspace check this
> capability too.
>
> Right now we are checking
> drmModeGetResources()/drm_mode_getresources() for a error to detect
> if display is enabled but it is a hackish way as it can fail for
> other reasons too.
>
> Signed-off-by: José Roberto de Souza <jose.souza@xxxxxxxxx>
> ---
> drivers/gpu/drm/drm_ioctl.c | 3 +++
> include/uapi/drm/drm.h | 1 +
> 2 files changed, 4 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_ioctl.c
> b/drivers/gpu/drm/drm_ioctl.c
> index ea10e9a26aad..3a8438ae9b51 100644
> --- a/drivers/gpu/drm/drm_ioctl.c
> +++ b/drivers/gpu/drm/drm_ioctl.c
> @@ -244,6 +244,9 @@ static int drm_getcap(struct drm_device *dev,
> void *data, struct drm_file *file_
> case DRM_CAP_SYNCOBJ:
> req->value = drm_core_check_feature(dev,
> DRIVER_SYNCOBJ);
> return 0;
> + case DRM_CAP_MODESET:
> + req->value = drm_core_check_feature(dev,
> DRIVER_MODESET);
> + return 0;
> }
>
> /* Other caps only work with KMS drivers */
> diff --git a/include/uapi/drm/drm.h b/include/uapi/drm/drm.h
> index 300f336633f2..85fae6ddbf48 100644
> --- a/include/uapi/drm/drm.h
> +++ b/include/uapi/drm/drm.h
> @@ -649,6 +649,7 @@ struct drm_gem_open {
> #define DRM_CAP_PAGE_FLIP_TARGET 0x11
> #define DRM_CAP_CRTC_IN_VBLANK_EVENT 0x12
> #define DRM_CAP_SYNCOBJ 0x13
> +#define DRM_CAP_MODESET 0x14
>
> /** DRM_IOCTL_GET_CAP ioctl argument type */
> struct drm_get_cap {
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