On Thu, 2016-08-11 at 16:41 -0700, Anusha Srivatsa wrote: > drm/dp/mst/i915 > > Signed-off-by: Anusha Srivatsa <anusha.srivatsa@xxxxxxxxx> > > Validate the modes against available link bandwidth rather than > maximum link bandwidth so that we have a better idea as to whether > a proposed mode can truly run beside existing stream. The Signed-off line follows the explanation body. https://www.kernel.org/doc/Documentation/SubmittingPatches > --- > drivers/gpu/drm/i915/intel_dp_mst.c | 14 ++++++++++++-- > 1 file changed, 12 insertions(+), 2 deletions(-) > > diff --git a/drivers/gpu/drm/i915/intel_dp_mst.c b/drivers/gpu/drm/i915/intel_dp_mst.c > index 629337d..e7e87d7 100644 > --- a/drivers/gpu/drm/i915/intel_dp_mst.c > +++ b/drivers/gpu/drm/i915/intel_dp_mst.c > @@ -352,13 +352,23 @@ static enum drm_mode_status > intel_dp_mst_mode_valid(struct drm_connector *connector, > struct drm_display_mode *mode) > { > + int req_pbn = 0; > + int avail_pbn = 0; > + struct intel_connector *intel_connector = to_intel_connector(connector); > + struct intel_dp *intel_dp = intel_connector->mst_port; > + struct drm_dp_mst_topology_mgr *mgr = &intel_dp->mst_mgr; > + struct drm_dp_mst_port *port = (struct drm_dp_mst_port *) (intel_connector->port); > int max_dotclk = to_i915(connector->dev)->max_dotclk_freq; > > - /* TODO - validate mode against available PBN for link */ > + avail_pbn = drm_dp_mst_get_avail_pbn(mgr, port); > + req_pbn = drm_dp_calc_pbn_mode(mode->clock, 24); > + if (req_pbn > avail_pbn) > + return MODE_H_ILLEGAL; > + > if (mode->clock < 10000) > return MODE_CLOCK_LOW; > > - if (mode->flags & DRM_MODE_FLAG_DBLCLK) > + if (mode->flags & DRM_MODE_FLAG_DBLCLK) > return MODE_H_ILLEGAL; > > if (mode->clock > max_dotclk) _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
