[1/6] drm/edid: add drm_edid_is_digital()

Checking edid->input & DRM_EDID_INPUT_DIGITAL is common enough to
deserve a helper that also lets us abstract the raw EDID a bit better.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/drm_edid.c | 17 +++++++++++++++--
 include/drm/drm_edid.h     |  1 +
 2 files changed, 16 insertions(+), 2 deletions(-)

On Thu, Aug 24, 2023 at 9:46 AM Jani Nikula <jani.nikula@intel.com> wrote:
>
> Checking edid->input & DRM_EDID_INPUT_DIGITAL is common enough to
> deserve a helper that also lets us abstract the raw EDID a bit better.
>
> Signed-off-by: Jani Nikula <jani.nikula@intel.com>

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

Seems to be a few additional users of this that could be converted:

drivers/gpu/drm/i915/display/intel_sdvo.c:        if (edid &&
edid->input & DRM_EDID_INPUT_DIGITAL)
drivers/gpu/drm/i915/display/intel_sdvo.c:    bool monitor_is_digital
= !!(edid->input & DRM_EDID_INPUT_DIGITAL);
drivers/gpu/drm/i915/display/intel_crt.c:        bool is_digital =
edid->input & DRM_EDID_INPUT_DIGITAL;
drivers/gpu/drm/i915/display/intel_hdmi.c:    if (edid && edid->input
& DRM_EDID_INPUT_DIGITAL) {
drivers/gpu/drm/gma500/psb_intel_sdvo.c:        if (edid->input &
DRM_EDID_INPUT_DIGITAL) {
drivers/gpu/drm/gma500/psb_intel_sdvo.c:            if (edid->input &
DRM_EDID_INPUT_DIGITAL)
drivers/gpu/drm/gma500/psb_intel_sdvo.c:        bool
monitor_is_digital = !!(edid->input & DRM_EDID_INPUT_DIGITAL);
drivers/gpu/drm/gma500/psb_intel_sdvo.c:    if (edid != NULL &&
edid->input & DRM_EDID_INPUT_DIGITAL)
drivers/gpu/drm/gma500/cdv_intel_hdmi.c:        if (edid->input &
DRM_EDID_INPUT_DIGITAL) {
drivers/gpu/drm/display/drm_dp_helper.c:        edid->input &
DRM_EDID_INPUT_DIGITAL &&
drivers/gpu/drm/nouveau/nouveau_connector.c:            if
(nv_connector->edid->input & DRM_EDID_INPUT_DIGITAL)
drivers/gpu/drm/radeon/radeon_connectors.c:
!!(radeon_connector->edid->input & DRM_EDID_INPUT_DIGITAL);
drivers/gpu/drm/radeon/radeon_connectors.c:
!!(radeon_connector->edid->input & DRM_EDID_INPUT_DIGITAL);
drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c:
!!(amdgpu_connector->edid->input & DRM_EDID_INPUT_DIGITAL);
drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c:
!!(amdgpu_connector->edid->input & DRM_EDID_INPUT_DIGITAL);




> ---
>  drivers/gpu/drm/drm_edid.c | 17 +++++++++++++++--
>  include/drm/drm_edid.h     |  1 +
>  2 files changed, 16 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
> index 340da8257b51..1dbb15439468 100644
> --- a/drivers/gpu/drm/drm_edid.c
> +++ b/drivers/gpu/drm/drm_edid.c
> @@ -3110,7 +3110,7 @@ drm_monitor_supports_rb(const struct drm_edid *drm_edid)
>                 return ret;
>         }
>
> -       return ((drm_edid->edid->input & DRM_EDID_INPUT_DIGITAL) != 0);
> +       return drm_edid_is_digital(drm_edid);
>  }
>
>  static void
> @@ -6519,7 +6519,7 @@ static void update_display_info(struct drm_connector *connector,
>         if (edid->revision < 3)
>                 goto out;
>
> -       if (!(edid->input & DRM_EDID_INPUT_DIGITAL))
> +       if (!drm_edid_is_digital(drm_edid))
>                 goto out;
>
>         info->color_formats |= DRM_COLOR_FORMAT_RGB444;
> @@ -7335,3 +7335,16 @@ static void _drm_update_tile_info(struct drm_connector *connector,
>                 connector->tile_group = NULL;
>         }
>  }
> +
> +/**
> + * drm_edid_is_digital - is digital?
> + * @drm_edid: The EDID
> + *
> + * Return true if input is digital.
> + */
> +bool drm_edid_is_digital(const struct drm_edid *drm_edid)
> +{
> +       return drm_edid && drm_edid->edid &&
> +               drm_edid->edid->input & DRM_EDID_INPUT_DIGITAL;
> +}
> +EXPORT_SYMBOL(drm_edid_is_digital);
> diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
> index 48e93f909ef6..882d2638708e 100644
> --- a/include/drm/drm_edid.h
> +++ b/include/drm/drm_edid.h
> @@ -612,6 +612,7 @@ const struct drm_edid *drm_edid_read_switcheroo(struct drm_connector *connector,
>  int drm_edid_connector_update(struct drm_connector *connector,
>                               const struct drm_edid *edid);
>  int drm_edid_connector_add_modes(struct drm_connector *connector);
> +bool drm_edid_is_digital(const struct drm_edid *drm_edid);
>
>  const u8 *drm_find_edid_extension(const struct drm_edid *drm_edid,
>                                   int ext_id, int *ext_index);
> --
> 2.39.2
>