| Message ID | 1470958900-822-1-git-send-email-anusha.srivatsa@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Thu, 2016-08-11 at 16:41 -0700, Anusha Srivatsa wrote: > drm/dp/mst > > Signed-off-by: Anusha Srivatsa <anusha.srivatsa@intel.com> > > 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@lists.freedesktop.org > --- > 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); >
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);
drm/dp/mst Signed-off-by: Anusha Srivatsa <anusha.srivatsa@intel.com> 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. Cc: dri-devel@lists.freedesktop.org --- drivers/gpu/drm/drm_dp_mst_topology.c | 12 ++++++++++++ include/drm/drm_dp_mst_helper.h | 1 + 2 files changed, 13 insertions(+)