On Mon, 30 Mar 2015, Russell King <rmk+kernel@xxxxxxxxxxxxxxxx> wrote:
> Add a function to find the start of the SADs in the ELD. This
> complements the helper to retrieve the SAD count.
>
> Signed-off-by: Russell King <rmk+kernel@xxxxxxxxxxxxxxxx>
I guess version 31 is specific enough to warrant a #define of its own,
but meh.
Reviewed-by: Jani Nikula <jani.nikula@xxxxxxxxx>
> ---
> include/drm/drm_edid.h | 19 +++++++++++++++++++
> 1 file changed, 19 insertions(+)
>
> diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
> index 87d85e81d3a7..c44ad513e0f7 100644
> --- a/include/drm/drm_edid.h
> +++ b/include/drm/drm_edid.h
> @@ -346,6 +346,25 @@ static inline int drm_eld_mnl(const uint8_t *eld)
> }
>
> /**
> + * drm_eld_sad - Get ELD SAD structures.
> + * @eld: pointer to an eld memory structure with sad_count set
> + */
> +static inline const uint8_t *drm_eld_sad(const uint8_t *eld)
> +{
> + unsigned int ver, mnl;
> +
> + ver = (eld[DRM_ELD_VER] & DRM_ELD_VER_MASK) >> DRM_ELD_VER_SHIFT;
> + if (ver != 2 && ver != 31)
> + return NULL;
> +
> + mnl = drm_eld_mnl(eld);
> + if (mnl > 16)
> + return NULL;
> +
> + return eld + DRM_ELD_CEA_SAD(mnl, 0);
> +}
> +
> +/**
> * drm_eld_sad_count - Get ELD SAD count.
> * @eld: pointer to an eld memory structure with sad_count set
> */
> --
> 1.8.3.1
>
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--
Jani Nikula, Intel Open Source Technology Center
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