[Intel-gfx] [PATCH 3/3] drm/i915/dp: Add all tiled and port sync conns to modeset
Ville Syrjälä
ville.syrjala at linux.intel.com
Mon Feb 3 14:10:20 UTC 2020
On Fri, Jan 31, 2020 at 12:54:52PM -0800, Manasi Navare wrote:
> On Fri, Jan 31, 2020 at 10:05:03PM +0200, Ville Syrjälä wrote:
> > On Fri, Jan 31, 2020 at 11:46:25AM -0800, Manasi Navare wrote:
> > > On Fri, Jan 31, 2020 at 07:53:23PM +0200, Ville Syrjälä wrote:
> > > > On Fri, Jan 31, 2020 at 09:15:47AM -0800, Manasi Navare wrote:
> > > > > If one of the synced crtcs needs a full modeset, we need
> > > > > to make sure all the synced crtcs are forced a full
> > > > > modeset.
> > > > >
> > > > > Suggested-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> > > > > Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
> > > > > Signed-off-by: Manasi Navare <manasi.d.navare at intel.com>
> > > > > ---
> > > > > drivers/gpu/drm/i915/display/intel_display.c | 88 +------------
> > > > > drivers/gpu/drm/i915/display/intel_dp.c | 131 ++++++++++++++++++-
> > > > > 2 files changed, 131 insertions(+), 88 deletions(-)
> > > > >
> > > > > diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
> > > > > index e638543f5f87..709a737638b6 100644
> > > > > --- a/drivers/gpu/drm/i915/display/intel_display.c
> > > > > +++ b/drivers/gpu/drm/i915/display/intel_display.c
> > > > > @@ -13123,8 +13123,7 @@ intel_modeset_pipe_config(struct intel_crtc_state *pipe_config)
> > > > > struct drm_i915_private *i915 = to_i915(pipe_config->uapi.crtc->dev);
> > > > > struct drm_connector *connector;
> > > > > struct drm_connector_state *connector_state;
> > > > > - int base_bpp, ret;
> > > > > - int i, tile_group_id = -1, num_tiled_conns = 0;
> > > > > + int base_bpp, ret, i;
> > > > > bool retry = true;
> > > > >
> > > > > pipe_config->cpu_transcoder =
> > > > > @@ -14559,76 +14558,6 @@ static bool intel_cpu_transcoders_need_modeset(struct intel_atomic_state *state,
> > > > > return false;
> > > > > }
> > > > >
> > > > > -static int
> > > > > -intel_modeset_all_tiles(struct intel_atomic_state *state, int tile_grp_id)
> > > > > -{
> > > > > - struct drm_i915_private *dev_priv = to_i915(state->base.dev);
> > > > > - struct drm_connector *connector;
> > > > > - struct drm_connector_list_iter conn_iter;
> > > > > - int ret = 0;
> > > > > -
> > > > > - drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter);
> > > > > - drm_for_each_connector_iter(connector, &conn_iter) {
> > > > > - struct drm_connector_state *conn_state;
> > > > > - struct drm_crtc_state *crtc_state;
> > > > > -
> > > > > - if (!connector->has_tile ||
> > > > > - connector->tile_group->id != tile_grp_id)
> > > > > - continue;
> > > > > - conn_state = drm_atomic_get_connector_state(&state->base,
> > > > > - connector);
> > > > > - if (IS_ERR(conn_state)) {
> > > > > - ret = PTR_ERR(conn_state);
> > > > > - break;
> > > > > - }
> > > > > -
> > > > > - if (!conn_state->crtc)
> > > > > - continue;
> > > > > -
> > > > > - crtc_state = drm_atomic_get_crtc_state(&state->base,
> > > > > - conn_state->crtc);
> > > > > - if (IS_ERR(crtc_state)) {
> > > > > - ret = PTR_ERR(crtc_state);
> > > > > - break;
> > > > > - }
> > > > > - crtc_state->mode_changed = true;
> > > > > - ret = drm_atomic_add_affected_connectors(&state->base,
> > > > > - conn_state->crtc);
> > > > > - if (ret)
> > > > > - break;
> > > > > - }
> > > > > - drm_connector_list_iter_end(&conn_iter);
> > > > > -
> > > > > - return ret;
> > > > > -}
> > > > > -
> > > > > -static int
> > > > > -intel_atomic_check_tiled_conns(struct intel_atomic_state *state)
> > > > > -{
> > > > > - struct drm_i915_private *dev_priv = to_i915(state->base.dev);
> > > > > - struct drm_connector *connector;
> > > > > - struct drm_connector_state *old_conn_state, *new_conn_state;
> > > > > - int i, ret;
> > > > > -
> > > > > - if (INTEL_GEN(dev_priv) < 11)
> > > > > - return 0;
> > > > > -
> > > > > - /* Is tiled, mark all other tiled CRTCs as needing a modeset */
> > > > > - for_each_oldnew_connector_in_state(&state->base, connector,
> > > > > - old_conn_state, new_conn_state, i) {
> > > > > - if (!connector->has_tile)
> > > > > - continue;
> > > > > - if (!intel_connector_needs_modeset(state, connector))
> > > > > - continue;
> > > > > -
> > > > > - ret = intel_modeset_all_tiles(state, connector->tile_group->id);
> > > > > - if (ret)
> > > > > - return ret;
> > > > > - }
> > > > > -
> > > > > - return 0;
> > > > > -}
> > > > > -
> > > > > /**
> > > > > * intel_atomic_check - validate state object
> > > > > * @dev: drm device
> > > > > @@ -14656,21 +14585,6 @@ static int intel_atomic_check(struct drm_device *dev,
> > > > > if (ret)
> > > > > goto fail;
> > > > >
> > > > > - /**
> > > > > - * This check adds all the connectors in current state that belong to
> > > > > - * the same tile group to a full modeset.
> > > > > - * This function directly sets the mode_changed to true and we also call
> > > > > - * drm_atomic_add_affected_connectors(). Hence we are not explicitly
> > > > > - * calling drm_atomic_helper_check_modeset() after this.
> > > > > - *
> > > > > - * Fixme: Handle some corner cases where one of the
> > > > > - * tiled connectors gets disconnected and tile info is lost but since it
> > > > > - * was previously synced to other conn, we need to add that to the modeset.
> > > > > - */
> > > > > - ret = intel_atomic_check_tiled_conns(state);
> > > > > - if (ret)
> > > > > - goto fail;
> > > > > -
> > > > > for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
> > > > > new_crtc_state, i) {
> > > > > if (!needs_modeset(new_crtc_state)) {
> > > > > diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
> > > > > index f4dede6253f8..7eb4b3dbbcb3 100644
> > > > > --- a/drivers/gpu/drm/i915/display/intel_dp.c
> > > > > +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> > > > > @@ -6582,6 +6582,135 @@ void intel_dp_encoder_reset(struct drm_encoder *encoder)
> > > > > }
> > > > > }
> > > > >
> > > > > +static int intel_modeset_tile_group(struct intel_atomic_state *state,
> > > > > + int tile_group_id)
> > > > > +{
> > > > > + struct drm_i915_private *dev_priv = to_i915(state->base.dev);
> > > > > + struct drm_connector_list_iter conn_iter;
> > > > > + struct drm_connector *connector;
> > > > > + int ret = 0;
> > > > > +
> > > > > + drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter);
> > > > > + drm_for_each_connector_iter(connector, &conn_iter) {
> > > > > + struct drm_connector_state *conn_state;
> > > > > + struct intel_crtc_state *crtc_state;
> > > > > + struct intel_crtc *crtc;
> > > > > +
> > > > > + if (!connector->has_tile ||
> > > > > + connector->tile_group->id != tile_group_id)
> > > > > + continue;
> > > > > +
> > > > > + conn_state = drm_atomic_get_connector_state(&state->base,
> > > > > + connector);
> > > > > + if (IS_ERR(conn_state)) {
> > > > > + ret = PTR_ERR(conn_state);
> > > > > + break;
> > > > > + }
> > > > > +
> > > > > + crtc = to_intel_crtc(conn_state->crtc);
> > > > > +
> > > > > + if (!crtc)
> > > > > + continue;
> > > > > +
> > > > > + crtc_state = intel_atomic_get_crtc_state(&state->base, crtc);
> > > > > + if (IS_ERR(crtc_state)) {
> > > > > + ret = PTR_ERR(crtc_state);
> > > > > + break;
> > > > > + }
> > > > > +
> > > > > + crtc_state->uapi.mode_changed = true;
> > > > > +
> > > > > + ret = drm_atomic_add_affected_planes(&state->base, &crtc->base);
> > > > > + if (ret)
> > > > > + break;
> > > > > + }
> > > > > + drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter);
> > > > > +
> > > > > + return ret;
> > > > > +}
> > > > > +
> > > > > +static int intel_modeset_affected_transcoders(struct intel_atomic_state *state, u8 transcoders)
> > > > > +{
> > > > > + struct drm_i915_private *dev_priv = to_i915(state->base.dev);
> > > > > + struct intel_crtc *crtc;
> > > > > +
> > > > > + if (transcoders == 0)
> > > > > + return 0;
> > > > > +
> > > > > + for_each_intel_crtc(&dev_priv->drm, crtc) {
> > > > > + struct intel_crtc_state *crtc_state;
> > > > > + int ret;
> > > > > +
> > > > > + if ((transcoders & BIT(crtc->pipe)) == 0)
> > > > > + continue;
> > > >
> > > > Dropping the EDP transcoder on the floor here. I think we should just do
> > > > the guaranteed correct thing and look at the cpu_transcoder instead.
> > > > Yes, that does mean we more or less end up adding all crtcs to the state
> > > > whenever modesetting any synced crtc, but so be it. We can think of ways
> > > > to optimize that later.
> > > >
> > >
> > > So should i not even do this check of trans & BIT(crtc->pipe) ? Instead just proceed
> > > to go get the crtc state and then check if trans & BIT(crtc_state->cpu_trans) ?
> >
> > Yeah, I think that's fine for now. We can try to optimize it later if
> > needed.
> >
> > >
> > > Or should I keep this as is and then add the second loop like in your branch?
> > >
> > > > > +
> > > > > + crtc_state = intel_atomic_get_crtc_state(&state->base, crtc);
> > > > > + if (IS_ERR(crtc_state))
> > > > > + return PTR_ERR(crtc_state);
> > > > > +
> > > > > + if (!crtc_state->hw.enable)
> > > > > + continue;
> > > > > +
> > > > > + crtc_state->uapi.mode_changed = true;
> > > > > +
> > > > > + ret = drm_atomic_add_affected_connectors(&state->base, &crtc->base);
> > > > > + if (ret)
> > > > > + return ret;
> > > >
> > > > Missing add_affected_planes() here I think. Or was that guaranteed to be
> > > > done by the helper? Can't recall.
> > > >
> > >
> > > No i think i missed it, will add that
> > >
> > > > > +
> > > > > + WARN_ON((enum transcoder)crtc->pipe != crtc_state->cpu_transcoder);
> > > > > +
> > > > > + transcoders &= ~BIT(crtc_state->cpu_transcoder);
> > > > > + }
> > > > > +
> > > > > + WARN_ON(transcoders != 0);
> > > > > +
> > > > > + return 0;
> > > > > +
> > > > > +}
> > > > > +
> > > > > +static int intel_modeset_synced_crtcs(struct intel_atomic_state *state,
> > > > > + struct drm_connector *connector)
> > > > > +{
> > > > > + const struct drm_connector_state *old_conn_state =
> > > > > + drm_atomic_get_old_connector_state(&state->base, connector);
> > > > > + const struct intel_crtc_state *old_crtc_state;
> > > > > + struct intel_crtc *crtc;
> > > > > +
> > > > > + crtc = to_intel_crtc(old_conn_state->crtc);
> > > > > + if (!crtc)
> > > > > + return 0;
> > > > > +
> > > > > + old_crtc_state = intel_atomic_get_old_crtc_state(state, crtc);
> > > > > +
> > > > > + if (!old_crtc_state->hw.active)
> > > > > + return 0;
> > > > > +
> > > > > + return intel_modeset_affected_transcoders(state,
> > > > > + (old_crtc_state->sync_mode_slaves_mask |
> > > > > + BIT(old_crtc_state->master_transcoder)) &
> > > >
> > > > This seems to have the same master==INVALID problem that we faced
> > > > elsewhere already.
> > > >
> > >
> > > Yes will have to add the same check and add it only for master_trans != INVALID, will add that
> > >
> > > > > + ~BIT(old_crtc_state->cpu_transcoder));
> > > >
> > > > I guess this part is redundant. Or can we somehow have our own
> > > > transcoder be included in sync_mode_slaves_mask/master_transcoder?
> > > >
> > >
> > > Actually shouldnt it be:
> > >
> > > if old_crtc_state->needs_modeset() {
> >
> > That would need to be new_crtc_state. And yes we should skip this
> > (and also intel_modeset_tile_group()) when there's no modeset.
> >
> > So the whole thing could probably look something like:
> > {
> > intel_digital_connector_atomic_check();
> >
> > if (!intel_connector_needs_modeset(connector))
> > return 0;
> >
> > if (tile)
> > intel_modeset_tile_group()
> >
> > intel_modeset_synced_crtcs();
> > }
>
> Great yea this makes sense.
> So then keep the ~BIT(old_crtc_state->cpu_transcoder)); right? so we dont forec modeset
> on the current crtc?
intel_connector_needs_modeset() already told us the old crtc (if any)
needs a modeset. But even if it didn't cpu_transcoder still can't be
part of master|slaves so still redundant.
>
> Manasi
>
> >
> > > then call intel_modeset_affected_transcoders(state,
> > > (old_crtc_state->sync_mode_slaves_mask |
> > > BIT(old_crtc_state->master_transcoder)) &
> > > ~BIT(old_crtc_state->cpu_transcoder));
> > >
> > > dont understand why ~BIT(old_crtc_state->cpu_transcoder) is redundant? why do we need to
> > > force modeset there if we add this needs_modeset check?
> > >
> > > Manasi
> > >
> > > > > +}
> > > > > +
> > > > > +static int intel_dp_connector_atomic_check(struct drm_connector *conn,
> > > > > + struct drm_atomic_state *_state)
> > > > > +{
> > > > > + struct drm_i915_private *dev_priv = to_i915(conn->dev);
> > > > > + struct intel_atomic_state *state = to_intel_atomic_state(_state);
> > > > > + int ret;
> > > > > +
> > > > > + ret = intel_digital_connector_atomic_check(conn, &state->base);
> > > > > + if (ret)
> > > > > + return ret;
> > > > > +
> > > > > + if (INTEL_GEN(dev_priv) >= 11 && conn->has_tile) {
> > > > > + ret = intel_modeset_tile_group(state, conn->tile_group->id);
> > > > > + if (ret)
> > > > > + return ret;
> > > > > + }
> > > > > +
> > > > > + return intel_modeset_synced_crtcs(state, conn);
> > > >
> > > > No gen check... Ah, yeah we don't need it because the port sync state
> > > > will be INVALID/0.
> > > >
> > > > > +}
> > > > > +
> > > > > static const struct drm_connector_funcs intel_dp_connector_funcs = {
> > > > > .force = intel_dp_force,
> > > > > .fill_modes = drm_helper_probe_single_connector_modes,
> > > > > @@ -6598,7 +6727,7 @@ static const struct drm_connector_helper_funcs intel_dp_connector_helper_funcs =
> > > > > .detect_ctx = intel_dp_detect,
> > > > > .get_modes = intel_dp_get_modes,
> > > > > .mode_valid = intel_dp_mode_valid,
> > > > > - .atomic_check = intel_digital_connector_atomic_check,
> > > > > + .atomic_check = intel_dp_connector_atomic_check,
> > > > > };
> > > > >
> > > > > static const struct drm_encoder_funcs intel_dp_enc_funcs = {
> > > > > --
> > > > > 2.19.1
> > > >
> > > > --
> > > > Ville Syrjälä
> > > > Intel
> >
> > --
> > Ville Syrjälä
> > Intel
--
Ville Syrjälä
Intel
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