On Wed, Mar 22, 2017 at 05:35:57PM +0000, Jose Abreu wrote:
> We can't expect userspace to have full support for all HDMI 2.0+
> features. Instead of expecting/waiting for userspace to support
> the new features add a knob, much like the stereo knob, so that
> DRM core will only expose the features when asked too.
>
> Signed-off-by: Jose Abreu <joabreu@xxxxxxxxxxxx>
> Cc: Carlos Palminha <palminha@xxxxxxxxxxxx>
> Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
> ---
> drivers/gpu/drm/drm_ioctl.c | 5 +++++
> include/drm/drm_file.h | 8 ++++++++
> include/uapi/drm/drm.h | 7 +++++++
> 3 files changed, 20 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
> index a7c61c2..2430e2e 100644
> --- a/drivers/gpu/drm/drm_ioctl.c
> +++ b/drivers/gpu/drm/drm_ioctl.c
> @@ -318,6 +318,11 @@ static int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_
> file_priv->atomic = req->value;
> file_priv->universal_planes = req->value;
> break;
> + case DRM_CLIENT_CAP_HDMI2:
> + if (req->value > 1)
> + return -EINVAL;
> + file_priv->hdmi2_allowed = req->value;
Needs some userspace to make use of this (like the -modesetting x.org
driver).
-Daniel
> + break;
> default:
> return -EINVAL;
> }
> diff --git a/include/drm/drm_file.h b/include/drm/drm_file.h
> index 5dd27ae..7b97d85 100644
> --- a/include/drm/drm_file.h
> +++ b/include/drm/drm_file.h
> @@ -192,6 +192,14 @@ struct drm_file {
> unsigned is_master:1;
>
> /**
> + * @hdmi2_allowed:
> + *
> + * True if client understands HDMI 2.0+ features like, for example,
> + * extended aspect ratios
> + */
> + unsigned hdmi2_allowed:1;
> +
> + /**
> * @master:
> *
> * Master this node is currently associated with. Only relevant if
> diff --git a/include/uapi/drm/drm.h b/include/uapi/drm/drm.h
> index b2c5284..9e25138 100644
> --- a/include/uapi/drm/drm.h
> +++ b/include/uapi/drm/drm.h
> @@ -678,6 +678,13 @@ struct drm_get_cap {
> */
> #define DRM_CLIENT_CAP_ATOMIC 3
>
> +/**
> + * DRM_CLIENT_CAP_HDMI2
> + *
> + * If set to 1, the DRM core will expose HDMI 2.0+ features to userspace
> + */
> +#define DRM_CLIENT_CAP_HDMI2 4
> +
> /** DRM_IOCTL_SET_CLIENT_CAP ioctl argument type */
> struct drm_set_client_cap {
> __u64 capability;
> --
> 1.9.1
>
>
> _______________________________________________
> dri-devel mailing list
> dri-devel@xxxxxxxxxxxxxxxxxxxxx
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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