On Wed, Oct 03, 2018 at 11:42:14AM -0700, Radhakrishna Sripada wrote:
> On Mon, Oct 01, 2018 at 04:48:01PM +0300, Ville Syrjälä wrote:
> > On Mon, Sep 24, 2018 at 02:08:15PM -0700, Radhakrishna Sripada wrote:
> > > Use the newly added "max bpc" connector property to limit pipe bpp.
> > >
> > > V3: Use drm_connector_state to access the "max bpc" property
> > > V4: Initialize the drm property, add suuport to DP(Ville)
> > > V5: Use the property in the connector and fix CI failure(Ville)
> > > V6: Use the core function to attach max_bpc property, remove the redundant
> > > clamping of pipe bpp based on connector info
> > > V7: Fix Checkpatch warnings
> > > V9: Cleanup connected_sink_max_bpp and fix initial value in DP(Ville)
> > >
> > > Cc: Ville Syrjälä <ville.syrj...@linux.intel.com>
> > > Cc: Daniel Vetter <daniel.vet...@ffwll.ch>
> > > Cc: Rodrigo Vivi <rodrigo.v...@intel.com>
> > > Cc: Kishore Kadiyala <kishore.kadiy...@intel.com>
> > > Cc: Manasi Navare <manasi.d.nav...@intel.com>
> > > Cc: Stanislav Lisovskiy <stanislav.lisovs...@intel.com>
> > > Signed-off-by: Radhakrishna Sripada <radhakrishna.srip...@intel.com>
> > > ---
> > > drivers/gpu/drm/i915/intel_display.c | 48
> > > +++++++++++++++++++++---------------
> > > drivers/gpu/drm/i915/intel_dp.c | 4 +++
> > > drivers/gpu/drm/i915/intel_hdmi.c | 5 ++++
> > > 3 files changed, 37 insertions(+), 20 deletions(-)
> > >
> > > diff --git a/drivers/gpu/drm/i915/intel_display.c
> > > b/drivers/gpu/drm/i915/intel_display.c
> > > index 931898013506..057abfd77cc3 100644
> > > --- a/drivers/gpu/drm/i915/intel_display.c
> > > +++ b/drivers/gpu/drm/i915/intel_display.c
> > > @@ -10839,30 +10839,38 @@ static void
> > > intel_modeset_update_connector_atomic_state(struct drm_device *dev)
> > > drm_connector_list_iter_end(&conn_iter);
> > > }
> > >
> > > -static void
> > > -connected_sink_compute_bpp(struct intel_connector *connector,
> > > - struct intel_crtc_state *pipe_config)
> > > +static int
> > > +connected_sink_max_bpp(const struct drm_connector_state *conn_state,
> > > + struct intel_crtc_state *pipe_config)
> > > {
> > > - const struct drm_display_info *info = &connector->base.display_info;
> > > - int bpp = pipe_config->pipe_bpp;
> > > + int bpp;
> > > + struct drm_display_info *info = &conn_state->connector->display_info;
> > >
> > > - DRM_DEBUG_KMS("[CONNECTOR:%d:%s] checking for sink bpp constrains\n",
> > > - connector->base.base.id,
> > > - connector->base.name);
> > > + bpp = min(pipe_config->pipe_bpp, conn_state->max_bpc * 3);
> >
> > Needs a check to make sure the connector has the property.
> We do make a check for the connector property in the drm core. In the absence
> of the property, conn_state->max_bpc carries the limit imposed from
> connector->display_info.bpc and would be requiring the codepath below.
Ah yes. That part is perfectly good then.
>
> Thoughts?
>
> -- Radhakrishna Sripada
> >
> > >
> > > - /* Don't use an invalid EDID bpc value */
> > > - if (info->bpc != 0 && info->bpc * 3 < bpp) {
> > > - DRM_DEBUG_KMS("clamping display bpp (was %d) to EDID reported
> > > max of %d\n",
> > > - bpp, info->bpc * 3);
> > > - pipe_config->pipe_bpp = info->bpc * 3;
> > > + switch (conn_state->max_bpc) {
> > > + case 6 ... 7:
> > > + pipe_config->pipe_bpp = 6 * 3;
> > > + case 8 ... 9:
> > > + pipe_config->pipe_bpp = 8 * 3;
> > > + break;
> > > + case 10 ... 11:
> > > + pipe_config->pipe_bpp = 10 * 3;
> > > + break;
> > > + case 12:
> > > + pipe_config->pipe_bpp = 12 * 3;
> > > + break;
> > > + default:
> > > + return -EINVAL;
> > > }
> > >
> > > - /* Clamp bpp to 8 on screens without EDID 1.4 */
> > > - if (info->bpc == 0 && bpp > 24) {
> > > - DRM_DEBUG_KMS("clamping display bpp (was %d) to default limit
> > > of 24\n",
> > > - bpp);
> > > - pipe_config->pipe_bpp = 24;
> > > + if (bpp != pipe_config->pipe_bpp) {
> > > + DRM_DEBUG_KMS("Limiting display bpp to %d instead of requested "
> > > + "bpp %d, Edid bpp %d\n", bpp, 3 * info->bpc,
> > > + 3 * conn_state->max_requested_bpc);
> >
> > The format string doesn't seem to match the arguments.
> >
> > > + pipe_config->pipe_bpp = bpp;
> > > }
> > > + return 0;
> > > }
> > >
> > > static int
> > > @@ -10893,8 +10901,8 @@ compute_baseline_pipe_bpp(struct intel_crtc *crtc,
> > > if (connector_state->crtc != &crtc->base)
> > > continue;
> > >
> > > - connected_sink_compute_bpp(to_intel_connector(connector),
> > > - pipe_config);
> > > + if (connected_sink_max_bpp(connector_state, pipe_config) < 0)
> > > + return -EINVAL;
> > > }
> > >
> > > return bpp;
> > > diff --git a/drivers/gpu/drm/i915/intel_dp.c
> > > b/drivers/gpu/drm/i915/intel_dp.c
> > > index 6b4c19123f2a..d8e128e771a1 100644
> > > --- a/drivers/gpu/drm/i915/intel_dp.c
> > > +++ b/drivers/gpu/drm/i915/intel_dp.c
> > > @@ -5719,6 +5719,10 @@ intel_dp_add_properties(struct intel_dp *intel_dp,
> > > struct drm_connector *connect
> > > intel_attach_force_audio_property(connector);
> > >
> > > intel_attach_broadcast_rgb_property(connector);
> > > + if (HAS_GMCH_DISPLAY(dev_priv))
> > > + drm_connector_attach_max_bpc_property(connector, 6, 10);
> > > + else if (INTEL_GEN(dev_priv) >= 5)
> > > + drm_connector_attach_max_bpc_property(connector, 6, 12);
> > >
> > > if (intel_dp_is_edp(intel_dp)) {
> > > u32 allowed_scalers;
> > > diff --git a/drivers/gpu/drm/i915/intel_hdmi.c
> > > b/drivers/gpu/drm/i915/intel_hdmi.c
> > > index a2dab0b6bde6..2b432c7e4f8a 100644
> > > --- a/drivers/gpu/drm/i915/intel_hdmi.c
> > > +++ b/drivers/gpu/drm/i915/intel_hdmi.c
> > > @@ -2109,11 +2109,16 @@ static const struct drm_encoder_funcs
> > > intel_hdmi_enc_funcs = {
> > > static void
> > > intel_hdmi_add_properties(struct intel_hdmi *intel_hdmi, struct
> > > drm_connector *connector)
> > > {
> > > + struct drm_i915_private *dev_priv = to_i915(connector->dev);
> > > +
> > > intel_attach_force_audio_property(connector);
> > > intel_attach_broadcast_rgb_property(connector);
> > > intel_attach_aspect_ratio_property(connector);
> > > drm_connector_attach_content_type_property(connector);
> > > connector->state->picture_aspect_ratio = HDMI_PICTURE_ASPECT_NONE;
> > > +
> > > + if (!HAS_GMCH_DISPLAY(dev_priv))
> > > + drm_connector_attach_max_bpc_property(connector, 8, 12);
> > > }
> > >
> > > /*
> > > --
> > > 2.9.3
> >
> > --
> > Ville Syrjälä
> > Intel
--
Ville Syrjälä
Intel
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