On Thu, May 04, 2023 at 08:15:01PM +0300, Ville Syrjälä wrote:
> On Thu, May 04, 2023 at 02:10:42AM +0300, Imre Deak wrote:
> > During HW readout/sanitization CRTCs can be disabled only if they don't
> > have an attached encoder (and so the encoder disable hooks don't need to
> > be called). An upcoming patch will need to disable CRTCs also with an
> > attached an encoder, so add support for this.
> >
> > For bigjoiner configs the encoder disabling hooks require the slave CRTC
> > states, so add these too to the atomic state. Since the connector atomic
> > state is already up-to-date when the CRTC is disabled the connector
> > state needs to be updated (reset) after the CRTC is disabled, make this
> > so. Follow the proper order of disabling first all bigjoiner slaves,
> > then any port synced CRTC slaves followed by the CRTC originally
> > requested to be disabled.
> >
> > v2:
> > - Fix calculating the bigjoiner_masters mask in a port sync config,
> > (Ville)
> > - Keep _noatomic suffix in intel_crtc_disable_noatomic(). (Ville)
> > - Rebase on full CRTC state reset in this patchset, not requiring
> > resetting the bigjoiner state separately and (instead) resetting
> > the full atomic CRTC and related global state after all linked
> > pipes got disabled.
> > - Disable portsync slaves before a portsync master.
> > - Disable a portsync master if a linked portsync slave is disabled.
> >
> > Cc: Ville Syrjälä <ville.syrj...@linux.intel.com>
> > Signed-off-by: Imre Deak <imre.d...@intel.com>
> > ---
> > drivers/gpu/drm/i915/display/intel_display.c | 2 +-
> > drivers/gpu/drm/i915/display/intel_display.h | 1 +
> > .../drm/i915/display/intel_modeset_setup.c | 159 ++++++++++++++++--
> > 3 files changed, 151 insertions(+), 11 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_display.c
> > b/drivers/gpu/drm/i915/display/intel_display.c
> > index ca95cf6764c04..f567c6bbc2a05 100644
> > --- a/drivers/gpu/drm/i915/display/intel_display.c
> > +++ b/drivers/gpu/drm/i915/display/intel_display.c
> > @@ -225,7 +225,7 @@ is_trans_port_sync_slave(const struct intel_crtc_state
> > *crtc_state)
> > return crtc_state->master_transcoder != INVALID_TRANSCODER;
> > }
> >
> > -static bool
> > +bool
> > is_trans_port_sync_master(const struct intel_crtc_state *crtc_state)
> > {
> > return crtc_state->sync_mode_slaves_mask != 0;
> > diff --git a/drivers/gpu/drm/i915/display/intel_display.h
> > b/drivers/gpu/drm/i915/display/intel_display.h
> > index ac95961f68ba7..3ecc5649a73ab 100644
> > --- a/drivers/gpu/drm/i915/display/intel_display.h
> > +++ b/drivers/gpu/drm/i915/display/intel_display.h
> > @@ -407,6 +407,7 @@ intel_mode_valid_max_plane_size(struct drm_i915_private
> > *dev_priv,
> > bool bigjoiner);
> > enum phy intel_port_to_phy(struct drm_i915_private *i915, enum port port);
> > bool is_trans_port_sync_mode(const struct intel_crtc_state *state);
> > +bool is_trans_port_sync_master(const struct intel_crtc_state *state);
> > bool intel_crtc_is_bigjoiner_slave(const struct intel_crtc_state
> > *crtc_state);
> > bool intel_crtc_is_bigjoiner_master(const struct intel_crtc_state
> > *crtc_state);
> > u8 intel_crtc_bigjoiner_slave_pipes(const struct intel_crtc_state
> > *crtc_state);
> > diff --git a/drivers/gpu/drm/i915/display/intel_modeset_setup.c
> > b/drivers/gpu/drm/i915/display/intel_modeset_setup.c
> > index 9848d20582963..1e10580e5ab31 100644
> > --- a/drivers/gpu/drm/i915/display/intel_modeset_setup.c
> > +++ b/drivers/gpu/drm/i915/display/intel_modeset_setup.c
> > @@ -38,9 +38,8 @@ static void intel_crtc_disable_noatomic_begin(struct
> > intel_crtc *crtc,
> > to_intel_crtc_state(crtc->base.state);
> > struct intel_plane *plane;
> > struct drm_atomic_state *state;
> > - struct intel_crtc_state *temp_crtc_state;
> > + struct intel_crtc *temp_crtc;
> > enum pipe pipe = crtc->pipe;
> > - int ret;
> >
> > if (!crtc_state->hw.active)
> > return;
> > @@ -65,10 +64,17 @@ static void intel_crtc_disable_noatomic_begin(struct
> > intel_crtc *crtc,
> > to_intel_atomic_state(state)->internal = true;
> >
> > /* Everything's already locked, -EDEADLK can't happen. */
> > - temp_crtc_state = intel_atomic_get_crtc_state(state, crtc);
> > - ret = drm_atomic_add_affected_connectors(state, &crtc->base);
> > + for_each_intel_crtc_in_pipe_mask(&i915->drm, temp_crtc,
> > + BIT(pipe) |
> > +
> > intel_crtc_bigjoiner_slave_pipes(crtc_state)) {
> > + struct intel_crtc_state *temp_crtc_state =
> > + intel_atomic_get_crtc_state(state, temp_crtc);
> > + int ret;
> >
> > - drm_WARN_ON(&i915->drm, IS_ERR(temp_crtc_state) || ret);
> > + ret = drm_atomic_add_affected_connectors(state,
> > &temp_crtc->base);
> > +
> > + drm_WARN_ON(&i915->drm, IS_ERR(temp_crtc_state) || ret);
> > + }
> >
> > i915->display.funcs.display->crtc_disable(to_intel_atomic_state(state),
> > crtc);
> >
> > @@ -105,9 +111,38 @@ static void set_encoder_for_connector(struct
> > intel_connector *connector,
> > }
> > }
> >
> > -static void intel_crtc_disable_noatomic_complete(struct intel_crtc *crtc)
> > +static void reset_encoder_connector_state(struct intel_encoder *encoder)
> > +{
> > + struct drm_i915_private *i915 = to_i915(encoder->base.dev);
> > + struct intel_connector *connector;
> > + struct drm_connector_list_iter conn_iter;
> > +
> > + drm_connector_list_iter_begin(&i915->drm, &conn_iter);
> > + for_each_intel_connector_iter(connector, &conn_iter) {
> > + if (connector->base.encoder != &encoder->base)
> > + continue;
> > +
> > + set_encoder_for_connector(connector, NULL);
> > +
> > + connector->base.dpms = DRM_MODE_DPMS_OFF;
> > + connector->base.encoder = NULL;
> > + }
> > + drm_connector_list_iter_end(&conn_iter);
> > +}
> > +
> > +static void reset_crtc_encoder_state(struct intel_crtc *crtc)
> > {
> > + struct drm_i915_private *i915 = to_i915(crtc->base.dev);
> > struct intel_encoder *encoder;
> > +
> > + for_each_encoder_on_crtc(&i915->drm, &crtc->base, encoder) {
> > + reset_encoder_connector_state(encoder);
> > + encoder->base.crtc = NULL;
> > + }
> > +}
> > +
> > +static void intel_crtc_disable_noatomic_complete(struct intel_crtc *crtc)
> > +{
> > struct drm_i915_private *i915 = to_i915(crtc->base.dev);
> > struct intel_bw_state *bw_state =
> > to_intel_bw_state(i915->display.bw.obj.state);
> > @@ -123,8 +158,7 @@ static void intel_crtc_disable_noatomic_complete(struct
> > intel_crtc *crtc)
> > intel_crtc_free_hw_state(crtc_state);
> > intel_crtc_state_reset(crtc_state, crtc);
> >
> > - for_each_encoder_on_crtc(&i915->drm, &crtc->base, encoder)
> > - encoder->base.crtc = NULL;
> > + reset_crtc_encoder_state(crtc);
> >
> > intel_fbc_disable(crtc);
> > intel_update_watermarks(i915);
> > @@ -141,11 +175,116 @@ static void
> > intel_crtc_disable_noatomic_complete(struct intel_crtc *crtc)
> > bw_state->num_active_planes[pipe] = 0;
> > }
> >
> > +/*
> > + * Return all the pipes using a transcoder in @transcoder_mask.
> > + * For bigjoiner configs return only the bigjoiner master.
> > + */
> > +static u32 get_transcoder_pipes(struct drm_i915_private *i915,
> > + u32 transcoder_mask)
> > +{
> > + struct intel_crtc *temp_crtc;
> > + u32 pipes = 0;
>
> I think we generally use u8 for pipe/transcoder masks. Ditto elsewhere.
Yes, did that elsewhere, but got it wrong here, will fix it.
>
> > +
> > + for_each_intel_crtc(&i915->drm, temp_crtc) {
> > + struct intel_crtc_state *temp_crtc_state =
> > + to_intel_crtc_state(temp_crtc->base.state);
> > +
> > + if (temp_crtc_state->cpu_transcoder == INVALID_TRANSCODER)
> > + continue;
> > +
> > + if (intel_crtc_is_bigjoiner_slave(temp_crtc_state))
> > + continue;
> > +
> > + if (transcoder_mask & BIT(temp_crtc_state->cpu_transcoder))
> > + pipes |= BIT(temp_crtc->pipe);
> > + }
> > +
> > + return pipes;
> > +}
> > +
> > +/*
> > + * Return the port sync master and slave pipes linked to @crtc.
> > + * For bigjoiner configs return only the bigjoiner master pipes.
> > + */
> > +static void get_portsync_pipes(struct intel_crtc *crtc,
> > + u32 *master_pipe_mask, u32 *slave_pipes_mask)
> > +{
> > + struct drm_i915_private *i915 = to_i915(crtc->base.dev);
> > + struct intel_crtc_state *crtc_state =
> > + to_intel_crtc_state(crtc->base.state);
> > + struct intel_crtc *master_crtc;
> > + struct intel_crtc_state *master_crtc_state;
> > + enum transcoder master_transcoder;
> > +
> > + if (!is_trans_port_sync_mode(crtc_state)) {
> > + *master_pipe_mask = BIT(crtc->pipe);
> > + *slave_pipes_mask = 0;
> > +
> > + return;
> > + }
> > +
> > + if (is_trans_port_sync_master(crtc_state))
> > + master_transcoder = crtc_state->cpu_transcoder;
> > + else
> > + master_transcoder = crtc_state->master_transcoder;
> > +
> > + *master_pipe_mask = get_transcoder_pipes(i915, BIT(master_transcoder));
> > + drm_WARN_ON(&i915->drm, hweight32(*master_pipe_mask) != 1);
>
> or perhaps is_power_of_two(). Doesn't really matter I suppose.
I wonder if hweight better expresses what we check for, but
is_power_of_2() is enough, so can use that instead.
> Reviewed-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
Thanks.
>
> > +
> > + master_crtc = intel_crtc_for_pipe(i915, ffs(*master_pipe_mask) - 1);
> > + master_crtc_state = to_intel_crtc_state(master_crtc->base.state);
> > + *slave_pipes_mask = get_transcoder_pipes(i915,
> > master_crtc_state->sync_mode_slaves_mask);
> > +}
> > +
> > +static u32 get_bigjoiner_slave_pipes(struct drm_i915_private *i915, u32
> > master_pipes_mask)
> > +{
> > + struct intel_crtc *master_crtc;
> > + u32 pipes = 0;
> > +
> > + for_each_intel_crtc_in_pipe_mask(&i915->drm, master_crtc,
> > master_pipes_mask) {
> > + struct intel_crtc_state *master_crtc_state =
> > + to_intel_crtc_state(master_crtc->base.state);
> > +
> > + pipes |= intel_crtc_bigjoiner_slave_pipes(master_crtc_state);
> > + }
> > +
> > + return pipes;
> > +}
> > +
> > static void intel_crtc_disable_noatomic(struct intel_crtc *crtc,
> > struct drm_modeset_acquire_ctx *ctx)
> > {
> > - intel_crtc_disable_noatomic_begin(crtc, ctx);
> > - intel_crtc_disable_noatomic_complete(crtc);
> > + struct drm_i915_private *i915 = to_i915(crtc->base.dev);
> > + u32 portsync_master_mask;
> > + u32 portsync_slaves_mask;
> > + u32 bigjoiner_slaves_mask;
> > + struct intel_crtc *temp_crtc;
> > +
> > + /* TODO: Add support for MST */
> > + get_portsync_pipes(crtc, &portsync_master_mask, &portsync_slaves_mask);
> > + bigjoiner_slaves_mask = get_bigjoiner_slave_pipes(i915,
> > + portsync_master_mask |
> > + portsync_slaves_mask);
> > +
> > + drm_WARN_ON(&i915->drm,
> > + portsync_master_mask & portsync_slaves_mask ||
> > + portsync_master_mask & bigjoiner_slaves_mask ||
> > + portsync_slaves_mask & bigjoiner_slaves_mask);
> > +
> > + for_each_intel_crtc_in_pipe_mask(&i915->drm, temp_crtc,
> > bigjoiner_slaves_mask)
> > + intel_crtc_disable_noatomic_begin(temp_crtc, ctx);
> > +
> > + for_each_intel_crtc_in_pipe_mask(&i915->drm, temp_crtc,
> > portsync_slaves_mask)
> > + intel_crtc_disable_noatomic_begin(temp_crtc, ctx);
> > +
> > + for_each_intel_crtc_in_pipe_mask(&i915->drm, temp_crtc,
> > portsync_master_mask)
> > + intel_crtc_disable_noatomic_begin(temp_crtc, ctx);
> > +
> > + for_each_intel_crtc_in_pipe_mask(&i915->drm, temp_crtc,
> > + bigjoiner_slaves_mask |
> > + portsync_slaves_mask |
> > + portsync_master_mask)
> > + intel_crtc_disable_noatomic_complete(temp_crtc);
> > }
> >
> > static void intel_modeset_update_connector_atomic_state(struct
> > drm_i915_private *i915)
> > --
> > 2.37.2
>
> --
> Ville Syrjälä
> Intel
