On Tue, 01 Dec 2015, "Subhransu S. Prusty" <subhransu.s.prusty@xxxxxxxxx> wrote:
> To fill the audio infoframe it is required to identify the connection type
> as DP or HDMI. So parse the required bits in ELD to find the connection
> type.
>
> Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@xxxxxxxxx>
> Signed-off-by: Vinod Koul <vinod.koul@xxxxxxxxx>
> Cc: David Airlie <airlied@xxxxxxxx>
> Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
> Cc: Daniel Vetter <daniel.vetter@xxxxxxxxx>
> ---
> include/drm/drm_edid.h | 10 ++++++++++
> 1 file changed, 10 insertions(+)
>
> diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
> index 2af9769..c7595a5 100644
> --- a/include/drm/drm_edid.h
> +++ b/include/drm/drm_edid.h
> @@ -403,6 +403,16 @@ 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
> + */
> +static inline int drm_eld_get_conn_type(const uint8_t *eld)
> +{
> + return (eld[DRM_ELD_SAD_COUNT_CONN_TYPE] & DRM_ELD_CONN_TYPE_MASK) >>
> + DRM_ELD_CONN_TYPE_SHIFT;
> +}
I'm not sure how much this helps when the caller still needs to
magically know what the return value means... Indeed the next patch
with /* 0 is hdmi and 1 is DP */ and "conn_type == 0" is a bit ugly.
How about just not shifting the return value, and using
DRM_ELD_CONN_TYPE_HDMI and DRM_ELD_CONN_TYPE_DP in the caller? Bonus
points for referencing those in the kernel-doc above.
BR,
Jani.
> +
> 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
_______________________________________________
dri-devel mailing list
dri-devel@xxxxxxxxxxxxxxxxxxxxx
http://lists.freedesktop.org/mailman/listinfo/dri-devel
