[alsa-devel] [PATCH v3 10/15] drm/edid: Add API to help find connection type

[Jani Nikula]

On Mon, 07 Dec 2015, "Subhransu S. Prusty" <subhransu.s.prusty at intel.com> wrote:
> To fill the audio infoframe it is required to identify the
> connection type as DP or HDMI. This patch adds an API which
> parses ELD and returns the display type of connected.
>
> Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty at intel.com>
> Signed-off-by: Vinod Koul <vinod.koul at intel.com>
> Cc: David Airlie <airlied at linux.ie>
> Cc: dri-devel at lists.freedesktop.org
> Cc: Daniel Vetter <daniel.vetter at intel.com>

Reviewed-by: Jani Nikula <jani.nikula at intel.com>


> ---
>  include/drm/drm_edid.h | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
>
> diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
> index 2af9769..8c537a0 100644
> --- a/include/drm/drm_edid.h
> +++ b/include/drm/drm_edid.h
> @@ -403,6 +403,18 @@ static inline int drm_eld_size(const uint8_t *eld)
>  	return DRM_ELD_HEADER_BLOCK_SIZE + eld[DRM_ELD_BASELINE_ELD_LEN] * 4;
>  }
>  
> +/**
> + * drm_eld_get_conn_type - Get device type hdmi/dp connected
> + * @eld: pointer to an eld memory structure
> + *
> + * The caller need to use %DRM_ELD_CONN_TYPE_HDMI or %DRM_ELD_CONN_TYPE_DP to
> + * identify the display type connected.
> + */
> +static inline u8 drm_eld_get_conn_type(const uint8_t *eld)
> +{
> +	return eld[DRM_ELD_SAD_COUNT_CONN_TYPE] & DRM_ELD_CONN_TYPE_MASK;
> +}
> +
>  struct edid *drm_do_get_edid(struct drm_connector *connector,
>  	int (*get_edid_block)(void *data, u8 *buf, unsigned int block,
>  			      size_t len),

-- 
Jani Nikula, Intel Open Source Technology Center