On Thu, 2016-08-11 at 16:41 -0700, Anusha Srivatsa wrote:
> drm/dp/mst
>
> Signed-off-by: Anusha Srivatsa <anusha.srivatsa@xxxxxxxxx>
>
> Add a function that returns the available link bandwidth for
> MST port so that we can accurately determine whether a new
> mode is valid for the link or not.
>
The Signed-off line should follow the explanation body.
> Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
> ---
> drivers/gpu/drm/drm_dp_mst_topology.c | 12 ++++++++++++
> include/drm/drm_dp_mst_helper.h | 1 +
> 2 files changed, 13 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
> index 04e4571..7a239f6 100644
> --- a/drivers/gpu/drm/drm_dp_mst_topology.c
> +++ b/drivers/gpu/drm/drm_dp_mst_topology.c
> @@ -43,6 +43,8 @@ static bool dump_dp_payload_table(struct drm_dp_mst_topology_mgr *mgr,
> char *buf);
> static int test_calc_pbn_mode(void);
>
> +int drm_dp_mst_get_avail_pbn(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port);
> +
> static void drm_dp_put_port(struct drm_dp_mst_port *port);
>
> static int drm_dp_dpcd_write_payload(struct drm_dp_mst_topology_mgr *mgr,
> @@ -2730,6 +2732,16 @@ static int test_calc_pbn_mode(void)
> return 0;
> }
>
> +int drm_dp_mst_get_avail_pbn(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port)
> +{
> + port = drm_dp_get_validated_port_ref(mgr,port);
> + if (port)
> + return port->available_pbn;
> +
> + return -EINVAL;
> +}
> +EXPORT_SYMBOL(drm_dp_mst_get_avail_pbn);
> +
> /* we want to kick the TX after we've ack the up/down IRQs. */
> static void drm_dp_mst_kick_tx(struct drm_dp_mst_topology_mgr *mgr)
> {
> diff --git a/include/drm/drm_dp_mst_helper.h b/include/drm/drm_dp_mst_helper.h
> index 0032076..74dc4ab 100644
> --- a/include/drm/drm_dp_mst_helper.h
> +++ b/include/drm/drm_dp_mst_helper.h
> @@ -576,6 +576,7 @@ struct edid *drm_dp_mst_get_edid(struct drm_connector *connector, struct drm_dp_
>
> int drm_dp_calc_pbn_mode(int clock, int bpp);
>
> +int drm_dp_mst_get_avail_pbn(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port);
>
> bool drm_dp_mst_allocate_vcpi(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, int pbn, int *slots);
>
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