[PATCH 08/10] drm/uapi: Deprecate nonsense kms mode types

[Alex Deucher]

On Tue, Nov 14, 2017 at 1:32 PM, Ville Syrjala
<ville.syrjala at linux.intel.com> wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
>
> BUILTIN, CRTC_C, CLOCK_C, and DEFULT mode types are unused. Let's
> refuse to generate them or accept them from userspace either. A
> cursory check didn't reveal any userspace code that would depend
> on these.
>
> Cc: Jose Abreu <Jose.Abreu at synopsys.com>
> Cc: Adam Jackson <ajax at redhat.com>
> Cc: Keith Packard <keithp at keithp.com>
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

Reviewed-by: Alex Deucher <alexander.deucher at amd.com>

> ---
>  include/drm/drm_modes.h     |  7 ++++---
>  include/uapi/drm/drm_mode.h | 14 +++++---------
>  2 files changed, 9 insertions(+), 12 deletions(-)
>
> diff --git a/include/drm/drm_modes.h b/include/drm/drm_modes.h
> index 99dd815269e9..7ac61858b54e 100644
> --- a/include/drm/drm_modes.h
> +++ b/include/drm/drm_modes.h
> @@ -242,8 +242,6 @@ struct drm_display_mode {
>          * A bitmask of flags, mostly about the source of a mode. Possible flags
>          * are:
>          *
> -        *  - DRM_MODE_TYPE_BUILTIN: Meant for hard-coded modes, effectively
> -        *    unused.
>          *  - DRM_MODE_TYPE_PREFERRED: Preferred mode, usually the native
>          *    resolution of an LCD panel. There should only be one preferred
>          *    mode per connector at any given time.
> @@ -253,8 +251,11 @@ struct drm_display_mode {
>          *  - DRM_MODE_TYPE_USERDEF: Mode defined via kernel command line
>          *
>          * Plus a big list of flags which shouldn't be used at all, but are
> -        * still around since these flags are also used in the userspace ABI:
> +        * still around since these flags are also used in the userspace ABI.
> +        * We no longer accept modes with these types though:
>          *
> +        *  - DRM_MODE_TYPE_BUILTIN: Meant for hard-coded modes, effectively
> +        *    unused.
>          *  - DRM_MODE_TYPE_DEFAULT: Again a leftover, use
>          *    DRM_MODE_TYPE_PREFERRED instead.
>          *  - DRM_MODE_TYPE_CLOCK_C and DRM_MODE_TYPE_CRTC_C: Define leftovers
> diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h
> index a7cded1c43e8..eb9b68c7c218 100644
> --- a/include/uapi/drm/drm_mode.h
> +++ b/include/uapi/drm/drm_mode.h
> @@ -38,19 +38,15 @@ extern "C" {
>  #define DRM_DISPLAY_MODE_LEN   32
>  #define DRM_PROP_NAME_LEN      32
>
> -#define DRM_MODE_TYPE_BUILTIN  (1<<0)
> -#define DRM_MODE_TYPE_CLOCK_C  ((1<<1) | DRM_MODE_TYPE_BUILTIN)
> -#define DRM_MODE_TYPE_CRTC_C   ((1<<2) | DRM_MODE_TYPE_BUILTIN)
> +#define DRM_MODE_TYPE_BUILTIN  (1<<0) /* deprecated */
> +#define DRM_MODE_TYPE_CLOCK_C  ((1<<1) | DRM_MODE_TYPE_BUILTIN) /* deprecated */
> +#define DRM_MODE_TYPE_CRTC_C   ((1<<2) | DRM_MODE_TYPE_BUILTIN) /* deprecated */
>  #define DRM_MODE_TYPE_PREFERRED        (1<<3)
> -#define DRM_MODE_TYPE_DEFAULT  (1<<4)
> +#define DRM_MODE_TYPE_DEFAULT  (1<<4) /* deprecated */
>  #define DRM_MODE_TYPE_USERDEF  (1<<5)
>  #define DRM_MODE_TYPE_DRIVER   (1<<6)
>
> -#define DRM_MODE_TYPE_ALL      (DRM_MODE_TYPE_BUILTIN |        \
> -                                DRM_MODE_TYPE_CLOCK_C |        \
> -                                DRM_MODE_TYPE_CRTC_C |         \
> -                                DRM_MODE_TYPE_PREFERRED |      \
> -                                DRM_MODE_TYPE_DEFAULT |        \
> +#define DRM_MODE_TYPE_ALL      (DRM_MODE_TYPE_PREFERRED |      \
>                                  DRM_MODE_TYPE_USERDEF |        \
>                                  DRM_MODE_TYPE_DRIVER)
>
> --
> 2.13.6
>
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