[Intel-gfx] [PATCH 4/4] drm: Add and handle new aspect ratios in DRM layer

[Sean Paul]

On Wed, Aug 3, 2016 at 6:56 AM, Shashank Sharma
<shashank.sharma at intel.com> wrote:
> HDMI 2.0/CEA-861-F introduces two new aspect ratios:
> - 64:27
> - 256:135
>
> This patch:
> -  Adds new DRM flags for to represent these new aspect ratios.
> -  Adds new cases to handle these aspect ratios while converting
> from user->kernel mode or viseversa.
>
> Signed-off-by: Shashank Sharma <shashank.sharma at intel.com>

Reviewed-by: Sean Paul <seanpaul at chromium.org>

> ---
>  drivers/gpu/drm/drm_modes.c | 12 ++++++++++++
>  include/uapi/drm/drm_mode.h |  6 ++++++
>  2 files changed, 18 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
> index e6029e0..bdc353d 100644
> --- a/drivers/gpu/drm/drm_modes.c
> +++ b/drivers/gpu/drm/drm_modes.c
> @@ -1481,6 +1481,12 @@ void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out,
>         case HDMI_PICTURE_ASPECT_16_9:
>                 out->flags |= DRM_MODE_FLAG_PAR16_9;
>                 break;
> +       case HDMI_PICTURE_ASPECT_64_27:
> +               out->flags |= DRM_MODE_FLAG_PAR64_27;
> +               break;
> +       case DRM_MODE_PICTURE_ASPECT_256_135:
> +               out->flags |= DRM_MODE_FLAG_PAR256_135;
> +               break;
>         case HDMI_PICTURE_ASPECT_NONE:
>         case HDMI_PICTURE_ASPECT_RESERVED:
>         default:
> @@ -1543,6 +1549,12 @@ int drm_mode_convert_umode(struct drm_display_mode *out,
>         case DRM_MODE_FLAG_PAR16_9:
>                 out->picture_aspect_ratio |= HDMI_PICTURE_ASPECT_16_9;
>                 break;
> +       case DRM_MODE_FLAG_PAR64_27:
> +               out->picture_aspect_ratio |= HDMI_PICTURE_ASPECT_64_27;
> +               break;
> +       case DRM_MODE_FLAG_PAR256_135:
> +               out->picture_aspect_ratio |= HDMI_PICTURE_ASPECT_256_135;
> +               break;
>         default:
>                 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_NONE;
>         }
> diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h
> index cd66a95..6291eae 100644
> --- a/include/uapi/drm/drm_mode.h
> +++ b/include/uapi/drm/drm_mode.h
> @@ -81,6 +81,8 @@ extern "C" {
>  #define DRM_MODE_PICTURE_ASPECT_NONE           0
>  #define DRM_MODE_PICTURE_ASPECT_4_3            1
>  #define DRM_MODE_PICTURE_ASPECT_16_9           2
> +#define DRM_MODE_PICTURE_ASPECT_64_27          3
> +#define DRM_MODE_PICTURE_ASPECT_256_135        4
>
>  /* Aspect ratio flag bitmask (4 bits 22:19) */
>  #define DRM_MODE_FLAG_PARMASK                  (0x0F<<19)
> @@ -90,6 +92,10 @@ extern "C" {
>                         (DRM_MODE_PICTURE_ASPECT_4_3 << 19)
>  #define  DRM_MODE_FLAG_PAR16_9 \
>                         (DRM_MODE_PICTURE_ASPECT_16_9 << 19)
> +#define  DRM_MODE_FLAG_PAR64_27 \
> +                       (DRM_MODE_PICTURE_ASPECT_64_27 << 19)
> +#define  DRM_MODE_FLAG_PAR256_135 \
> +                       (DRM_MODE_PICTURE_ASPECT_256_135 << 19)
>
>  /* DPMS flags */
>  /* bit compatible with the xorg definitions. */
> --
> 1.9.1
>
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