On Mon, Jun 06, 2016 at 04:29:05PM +0300, Mika Kahola wrote:
> Helper routine to read out DisplayPort branch device type. The spec
> defines these type as following
>
> 0 DisplayPort
> 1 Analog VGA
> 2 DVI
> 3 HDMI
> 4 Others without EDID support
> 5 DP++
> 6 Wireless
> 7 Reserved
>
> Signed-off-by: Mika Kahola <mika.kahola@xxxxxxxxx>
> ---
> drivers/gpu/drm/drm_dp_helper.c | 14 ++++++++++++++
> include/drm/drm_dp_helper.h | 1 +
> 2 files changed, 15 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c
> index c4149fd..7d3b245 100644
> --- a/drivers/gpu/drm/drm_dp_helper.c
> +++ b/drivers/gpu/drm/drm_dp_helper.c
> @@ -465,6 +465,20 @@ int drm_dp_downstream_port_cap(struct drm_dp_aux *aux,
> }
> EXPORT_SYMBOL(drm_dp_downstream_port_cap);
>
> +/**
> + * drm_dp_downstream_type() - extract downstream port type
> + * @dpcd: DisplayPort configuration data
> + * @port_cap: port capabilities
> + *
> + * Returns type in success or negative error code on failure
> + */
> +int drm_dp_downstream_type(const u8 dpcd[DP_RECEIVER_CAP_SIZE],
> + const u8 port_cap[4])
> +{
> + return port_cap[0] & DP_DS_PORT_TYPE_MASK;
> +}
> +EXPORT_SYMBOL(drm_dp_downstream_type);
Seems rather pointless to me.
> +
> /*
> * I2C-over-AUX implementation
> */
> diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
> index db8d3d47..f290829 100644
> --- a/include/drm/drm_dp_helper.h
> +++ b/include/drm/drm_dp_helper.h
> @@ -809,6 +809,7 @@ int drm_dp_link_configure(struct drm_dp_aux *aux, struct drm_dp_link *link);
> int drm_dp_downstream_port_cap(struct drm_dp_aux *aux,
> const u8 dpcd[DP_RECEIVER_CAP_SIZE],
> u8 port_cap[4]);
> +int drm_dp_downstream_type(const u8 dpcd[DP_RECEIVER_CAP_SIZE], const u8 port_cap[4]);
>
> int drm_dp_aux_register(struct drm_dp_aux *aux);
> void drm_dp_aux_unregister(struct drm_dp_aux *aux);
> --
> 1.9.1
--
Ville Syrjälä
Intel OTC
_______________________________________________
dri-devel mailing list
dri-devel@xxxxxxxxxxxxxxxxxxxxx
https://lists.freedesktop.org/mailman/listinfo/dri-devel
