On Mon, Sep 30, 2019 at 05:14:15PM +0300, Ville Syrjälä wrote:
> On Sun, Sep 22, 2019 at 10:08:02AM -0700, Manasi Navare wrote:
> > In case of tiled displays when the two tiles are sent across two CRTCs
> > over two separate DP SST connectors, we need a mechanism to synchronize
> > the two CRTCs and their corresponding transcoders.
> > So use the master-slave mode where there is one master corresponding
> > to last horizontal and vertical tile that needs to be genlocked with
> > all other slave tiles.
> > This patch identifies saves the master transcoder in all the slave
> > CRTC states. This is needed to select the master CRTC/transcoder
> > while configuring transcoder port sync for the corresponding slaves.
> >
> > v4:
> > * Rebase
> > v3:
> > * Use master_tramscoder instead of master_crtc for valid
> > HW state readouts (Ville)
> > v2:
> > * Move this to intel_mode_set_pipe_config(Jani N, Ville)
> > * Use slave_bitmask to save associated slaves in master crtc state (Ville)
> >
> > Cc: Daniel Vetter <[email protected]>
> > Cc: Ville Syrjälä <[email protected]>
> > Cc: Maarten Lankhorst <[email protected]>
> > Cc: Matt Roper <[email protected]>
> > Signed-off-by: Manasi Navare <[email protected]>
> > Reviewed-by: Maarten Lankhorst <[email protected]>
> > ---
> > drivers/gpu/drm/i915/display/intel_display.c | 123 ++++++++++++++++++
> > drivers/gpu/drm/i915/display/intel_display.h | 3 +
> > .../drm/i915/display/intel_display_types.h | 6 +
> > 3 files changed, 132 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_display.c
> > b/drivers/gpu/drm/i915/display/intel_display.c
> > index c05ba6af6226..4ff375d5852d 100644
> > --- a/drivers/gpu/drm/i915/display/intel_display.c
> > +++ b/drivers/gpu/drm/i915/display/intel_display.c
> > @@ -521,6 +521,24 @@ needs_modeset(const struct intel_crtc_state *state)
> > return drm_atomic_crtc_needs_modeset(&state->base);
> > }
> >
> > +bool
> > +is_trans_port_sync_mode(struct drm_i915_private *dev_priv,
>
> Redundant function parameter. Can be derived if needed.
Ok
>
> > + const struct intel_crtc_state *state)
>
> 'crtc_state'
Ok
>
> > +{
> > + return (INTEL_GEN(dev_priv) >= 11 &&
>
> I don't think we need a gen check at all. The state should not have
> master/slaves set if the feature is not supported.
Ok will remove this here and for master as well
>
> > + (state->master_transcoder != INVALID_TRANSCODER ||
> > + state->sync_mode_slaves_mask));
> > +}
> > +
> > +static bool
> > +is_trans_port_sync_master(struct drm_i915_private *dev_priv,
> > + const struct intel_crtc_state *state)
> > +{
> > + return (INTEL_GEN(dev_priv) >= 11 &&
> > + (state->master_transcoder == INVALID_TRANSCODER &&
> > + state->sync_mode_slaves_mask));
> > +}
> > +
> > /*
> > * Platform specific helpers to calculate the port PLL loopback- (clock.m),
> > * and post-divider (clock.p) values, pre- (clock.vco) and post-divided
> > fast
> > @@ -11773,6 +11791,91 @@ static bool c8_planes_changed(const struct
> > intel_crtc_state *new_crtc_state)
> > return !old_crtc_state->c8_planes != !new_crtc_state->c8_planes;
> > }
> >
> > +static int icl_add_sync_mode_crtcs(struct drm_crtc *crtc,
>
> intel_ types all over please.
Yes i think this patch was written we changed everything to intel_ states, will
change it all
to intel states
But do we stll keep drm_atomic_state or change that to intel_atomic_state as
well?
>
> Also don't need all three funciton arguments. Either just
> crtc_state or state+crtc will do.
Hmm, but I do need the atomic_state, crtc_state and also the crtc in the modeset
>
> > + struct intel_crtc_state *crtc_state,
> > + struct drm_atomic_state *state)
> > +{
> > + struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev);
> > + struct drm_connector *master_connector, *connector;
> > + struct drm_connector_state *connector_state;
> > + struct drm_connector_list_iter conn_iter;
> > + struct drm_crtc *master_crtc = NULL;
> > + struct drm_crtc_state *master_crtc_state;
> > + struct intel_crtc_state *master_pipe_config;
> > + int i, tile_group_id;
> > +
> > + if (INTEL_GEN(dev_priv) < 11)
> > + return 0;
> > +
> > + /*
> > + * In case of tiled displays there could be one or more slaves but
> > there is
> > + * only one master. Lets make the CRTC used by the connector
> > corresponding
> > + * to the last horizonal and last vertical tile a master/genlock CRTC.
> > + * All the other CRTCs corresponding to other tiles of the same Tile
> > group
> > + * are the slave CRTCs and hold a pointer to their genlock CRTC.
> > + */
> > + for_each_new_connector_in_state(state, connector, connector_state, i) {
> > + if (connector_state->crtc != crtc)
> > + continue;
> > + if (!connector->has_tile)
> > + continue;
> > + if (crtc_state->base.mode.hdisplay != connector->tile_h_size ||
> > + crtc_state->base.mode.vdisplay != connector->tile_v_size)
> > + return 0;
> > + if (connector->tile_h_loc == connector->num_h_tile - 1 &&
> > + connector->tile_v_loc == connector->num_v_tile - 1)
> > + continue;
> > + crtc_state->sync_mode_slaves_mask = 0;
> > + tile_group_id = connector->tile_group->id;
> > + drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter);
> > + drm_for_each_connector_iter(master_connector, &conn_iter) {
> > + struct drm_connector_state *master_conn_state = NULL;
> > +
> > + if (!master_connector->has_tile)
> > + continue;
> > + if (master_connector->tile_h_loc !=
> > master_connector->num_h_tile - 1 ||
> > + master_connector->tile_v_loc !=
> > master_connector->num_v_tile - 1)
> > + continue;
> > + if (master_connector->tile_group->id != tile_group_id)
> > + continue;
> > +
> > + master_conn_state =
> > drm_atomic_get_connector_state(state,
> > +
> > master_connector);
> > + if (IS_ERR(master_conn_state)) {
> > + drm_connector_list_iter_end(&conn_iter);
> > + return PTR_ERR(master_conn_state);
> > + }
> > + if (master_conn_state->crtc) {
> > + master_crtc = master_conn_state->crtc;
> > + break;
> > + }
> > + }
> > + drm_connector_list_iter_end(&conn_iter);
> > +
> > + if (!master_crtc) {
> > + DRM_DEBUG_KMS("Could not find Master CRTC for Slave
> > CRTC %d\n",
> > + connector_state->crtc->base.id);
> > + return -EINVAL;
> > + }
> > +
> > + master_crtc_state = drm_atomic_get_crtc_state(state,
> > + master_crtc);
> > + if (IS_ERR(master_crtc_state))
> > + return PTR_ERR(master_crtc_state);
> > +
> > + master_pipe_config = to_intel_crtc_state(master_crtc_state);
> > + crtc_state->master_transcoder =
> > master_pipe_config->cpu_transcoder;
> > + master_pipe_config->sync_mode_slaves_mask |=
> > + BIT(crtc_state->cpu_transcoder);
> > + DRM_DEBUG_KMS("Master Transcoder = %s added for Slave CRTC =
> > %d, slave transcoder bitmask = %d\n",
> > + transcoder_name(crtc_state->master_transcoder),
> > + crtc_state->base.crtc->base.id,
> > + master_pipe_config->sync_mode_slaves_mask);
> > + }
> > +
> > + return 0;
> > +}
> > +
> > static int intel_crtc_atomic_check(struct drm_crtc *_crtc,
> > struct drm_crtc_state *_crtc_state)
> > {
> > @@ -12276,6 +12379,12 @@ clear_intel_crtc_state(struct intel_crtc_state
> > *crtc_state)
> > if (IS_G4X(dev_priv) ||
> > IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
> > saved_state->wm = crtc_state->wm;
> > + /* Save the slave bitmask which gets filled for master crtc state during
> > + * slave atomic check call.
> > + */
>
> Wrong comment format.
What is wrong with the format?
>
> > + if (is_trans_port_sync_master(dev_priv, crtc_state))
> > + saved_state->sync_mode_slaves_mask =
> > + crtc_state->sync_mode_slaves_mask;
> >
> > /* Keep base drm_crtc_state intact, only clear our extended struct */
> > BUILD_BUG_ON(offsetof(struct intel_crtc_state, base));
> > @@ -12369,6 +12478,15 @@ intel_modeset_pipe_config(struct intel_crtc_state
> > *pipe_config)
> > drm_mode_set_crtcinfo(&pipe_config->base.adjusted_mode,
> > CRTC_STEREO_DOUBLE);
> >
> > + /* Set the crtc_state defaults for trans_port_sync */
> > + pipe_config->master_transcoder = INVALID_TRANSCODER;
> > + ret = icl_add_sync_mode_crtcs(crtc, pipe_config, state);
> > + if (ret) {
> > + DRM_DEBUG_KMS("Cannot assign Sync Mode CRTCs: %d\n",
> > + ret);
> > + return ret;
> > + }
> > +
> > /* Pass our mode to the connectors and the CRTC to give them a chance to
> > * adjust it according to limitations or connector properties, and also
> > * a chance to reject the mode entirely.
> > @@ -12882,6 +13000,11 @@ intel_pipe_config_compare(const struct
> > intel_crtc_state *current_config,
> > PIPE_CONF_CHECK_INFOFRAME(hdmi);
> > PIPE_CONF_CHECK_INFOFRAME(drm);
> >
> > + if (INTEL_GEN(dev_priv) >= 11) {
>
> Just do the check uncoditionally.
Ok makes sens, will remove the gen check
Regards
Manasi
>
> > + PIPE_CONF_CHECK_I(sync_mode_slaves_mask);
> > + PIPE_CONF_CHECK_I(master_transcoder);
> > + }
> > +
> > #undef PIPE_CONF_CHECK_X
> > #undef PIPE_CONF_CHECK_I
> > #undef PIPE_CONF_CHECK_BOOL
> > diff --git a/drivers/gpu/drm/i915/display/intel_display.h
> > b/drivers/gpu/drm/i915/display/intel_display.h
> > index b1ae0e59c715..1623face436b 100644
> > --- a/drivers/gpu/drm/i915/display/intel_display.h
> > +++ b/drivers/gpu/drm/i915/display/intel_display.h
> > @@ -93,6 +93,7 @@ enum pipe {
> > #define pipe_name(p) ((p) + 'A')
> >
> > enum transcoder {
> > + INVALID_TRANSCODER = -1,
> > /*
> > * The following transcoders have a 1:1 transcoder -> pipe mapping,
> > * keep their values fixed: the code assumes that TRANSCODER_A=0, the
> > @@ -453,6 +454,8 @@ enum drm_mode_status
> > intel_mode_valid_max_plane_size(struct drm_i915_private *dev_priv,
> > const struct drm_display_mode *mode);
> > enum phy intel_port_to_phy(struct drm_i915_private *i915, enum port port);
> > +bool is_trans_port_sync_mode(struct drm_i915_private *i915,
> > + const struct intel_crtc_state *state);
> >
> > void intel_plane_destroy(struct drm_plane *plane);
> > void i830_enable_pipe(struct drm_i915_private *dev_priv, enum pipe pipe);
> > diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h
> > b/drivers/gpu/drm/i915/display/intel_display_types.h
> > index d5cc4b810d9e..17ff34ca298b 100644
> > --- a/drivers/gpu/drm/i915/display/intel_display_types.h
> > +++ b/drivers/gpu/drm/i915/display/intel_display_types.h
> > @@ -991,6 +991,12 @@ struct intel_crtc_state {
> >
> > /* Forward Error correction State */
> > bool fec_enable;
> > +
> > + /* Pointer to master transcoder in case of tiled displays */
> > + enum transcoder master_transcoder;
> > +
> > + /* Bitmask to indicate slaves attached */
> > + u8 sync_mode_slaves_mask;
> > };
> >
> > struct intel_crtc {
> > --
> > 2.19.1
>
> --
> Ville Syrjälä
> Intel
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