[Intel-gfx] [PATCH v6 10/11] drm/i915: Add intel_update_bigjoiner handling.
Navare, Manasi
manasi.d.navare at intel.com
Mon Sep 21 21:18:33 UTC 2020
On Mon, Sep 14, 2020 at 12:21:26PM -0700, Navare, Manasi wrote:
> On Thu, Sep 03, 2020 at 10:23:35PM +0300, Ville Syrjälä wrote:
> > On Wed, Jul 15, 2020 at 03:42:21PM -0700, Manasi Navare wrote:
> > > From: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
> > >
> > > Enabling is done in a special sequence and so should plane updates
> > > be. Ideally the end user never notices the second pipe is used,
> > > so use the vblank evasion to cover both pipes.
> > >
> > > This way ideally everything will be tear free, and updates are
> > > really atomic as userspace expects it.
> > >
> > > ****This needs to be checked if it still works since lot of refactoring
> > > in skl_commit_modeset_enables
> > >
> > > v2:
> > > * Manual Rebase (Manasi)
> > > * Refactoring on intel_update_crtc and enable_crtc and removing
> > > special trans_port_sync_update (Manasi)
> > >
> > > Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
> > > Signed-off-by: Manasi Navare <manasi.d.navare at intel.com>
> > > ---
> > > drivers/gpu/drm/i915/display/intel_display.c | 120 +++++++++++++++++--
> > > drivers/gpu/drm/i915/display/intel_sprite.c | 25 +++-
> > > drivers/gpu/drm/i915/display/intel_sprite.h | 3 +-
> > > 3 files changed, 129 insertions(+), 19 deletions(-)
> > >
> > > diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
> > > index a1011414da6d..00b26863ffc6 100644
> > > --- a/drivers/gpu/drm/i915/display/intel_display.c
> > > +++ b/drivers/gpu/drm/i915/display/intel_display.c
> > > @@ -15656,7 +15656,7 @@ static void intel_update_crtc(struct intel_atomic_state *state,
> > > else
> > > i9xx_update_planes_on_crtc(state, crtc);
> > >
> > > - intel_pipe_update_end(new_crtc_state);
> > > + intel_pipe_update_end(new_crtc_state, NULL);
> > >
> > > /*
> > > * We usually enable FIFO underrun interrupts as part of the
> > > @@ -15754,6 +15754,52 @@ static void intel_commit_modeset_disables(struct intel_atomic_state *state)
> > > }
> > > }
> > >
> > > +static void intel_update_bigjoiner(struct intel_crtc *crtc,
> > > + struct intel_atomic_state *state,
> > > + struct intel_crtc_state *old_crtc_state,
> > > + struct intel_crtc_state *new_crtc_state)
> > > +{
> > > + struct drm_i915_private *dev_priv = to_i915(state->base.dev);
> > > + bool modeset = needs_modeset(new_crtc_state);
> > > + struct intel_crtc *slave = new_crtc_state->bigjoiner_linked_crtc;
> > > + struct intel_crtc_state *new_slave_crtc_state =
> > > + intel_atomic_get_new_crtc_state(state, slave);
> > > +
> > > + if (modeset) {
> > > + /* Enable slave first */
> > > + intel_crtc_update_active_timings(new_slave_crtc_state);
> > > + dev_priv->display.crtc_enable(state, slave);
> > > +
> > > + /* Then master */
> > > + intel_crtc_update_active_timings(new_crtc_state);
> > > + dev_priv->display.crtc_enable(state, crtc);
> > > +
> > > + /* vblanks work again, re-enable pipe CRC. */
> > > + intel_crtc_enable_pipe_crc(crtc);
> > > +
> > > + } else {
> > > + intel_pre_plane_update(state, crtc);
> > > + intel_pre_plane_update(state, slave);
> > > +
> > > + if (new_crtc_state->update_pipe)
> > > + intel_encoders_update_pipe(state, crtc);
> > > + }
> > > +
> > > + /*
> > > + * Perform vblank evasion around commit operation, and make sure to
> > > + * commit both planes simultaneously for best results.
> > > + */
> > > + intel_pipe_update_start(new_crtc_state);
> > > +
> > > + commit_pipe_config(state, crtc);
> > > + commit_pipe_config(state, slave);
> > > +
> > > + skl_update_planes_on_crtc(state, crtc);
> > > + skl_update_planes_on_crtc(state, slave);
> > > +
> > > + intel_pipe_update_end(new_crtc_state, new_slave_crtc_state);
> > > +}
> >
> > I think this should ideally all go away and just the normal logic
> > in commit_modeset_enables() should deal with it. Just like it does
> > for port sync/mst pipe dependencies.
> >
>
> Yes I think so too. Except for the intel_pipe_update_end where
> now we send the new_slave_crtc_state() so thats still something I need to figure
> how it will work in normal code without special bigjoiner handling.
>
> I think the 2p2p transcoder ports sync code initially had a special trans port sync handling
> function and thats why this was written this way but with the new code we just use
> the regular modeset_enables function with no special handling
>
> Manasi
>
> > > +
> > > static void intel_commit_modeset_enables(struct intel_atomic_state *state)
> > > {
> > > struct intel_crtc_state *new_crtc_state;
> > > @@ -15772,15 +15818,22 @@ static void intel_commit_modeset_enables(struct intel_atomic_state *state)
> > > static void skl_commit_modeset_enables(struct intel_atomic_state *state)
> > > {
> > > struct drm_i915_private *dev_priv = to_i915(state->base.dev);
> > > - struct intel_crtc *crtc;
> > > + struct intel_crtc *crtc, *slave;
> > > struct intel_crtc_state *old_crtc_state, *new_crtc_state;
> > > struct skl_ddb_entry entries[I915_MAX_PIPES] = {};
> > > + struct skl_ddb_entry new_entries[I915_MAX_PIPES] = {};
> > > u8 update_pipes = 0, modeset_pipes = 0;
> > > + const struct intel_crtc_state *slave_crtc_state;
> > > int i;
> > >
> > > for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
> > > enum pipe pipe = crtc->pipe;
> > >
> > > + if (new_crtc_state->bigjoiner_slave) {
> > > + /* We're updated from master */
> > > + continue;
> > > + }
> > > +
> > > if (!new_crtc_state->hw.active)
> > > continue;
> > >
> > > @@ -15791,6 +15844,34 @@ static void skl_commit_modeset_enables(struct intel_atomic_state *state)
> > > } else {
> > > modeset_pipes |= BIT(pipe);
> > > }
> > > +
> > > + if (new_crtc_state->bigjoiner) {
> > > + slave = new_crtc_state->bigjoiner_linked_crtc;
> > > + slave_crtc_state =
> > > + intel_atomic_get_new_crtc_state(state,
> > > + slave);
> > > +
> > > + /* put both entries in */
> > > + new_entries[i].start = new_crtc_state->wm.skl.ddb.start;
> > > + new_entries[i].end = slave_crtc_state->wm.skl.ddb.end;
> > > + } else {
> > > + new_entries[i] = new_crtc_state->wm.skl.ddb;
> > > + }
> > > +
> > > + /* ignore allocations for crtc's that have been turned off during modeset. */
> > > + if (needs_modeset(new_crtc_state))
> > > + continue;
> > > +
> > > + if (old_crtc_state->bigjoiner) {
> > > + slave = old_crtc_state->bigjoiner_linked_crtc;
> > > + slave_crtc_state =
> > > + intel_atomic_get_old_crtc_state(state, slave);
> > > +
> > > + entries[i].start = old_crtc_state->wm.skl.ddb.start;
> > > + entries[i].end = slave_crtc_state->wm.skl.ddb.end;
> > > + } else {
> > > + entries[i] = old_crtc_state->wm.skl.ddb;
> > > + }
> >
> > Why is this here? Can't see why the current code wouldn't work just fine
> > for bigjoiner too.
> >
Ville, could you provide inputs on how intel_pipe_update_end() should change so that we can use
the current code, now this takes an additional input new_slave_crtc_state
Manasi
> > > }
> > >
> > > /*
> > > @@ -15806,28 +15887,34 @@ static void skl_commit_modeset_enables(struct intel_atomic_state *state)
> > > for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
> > > new_crtc_state, i) {
> > > enum pipe pipe = crtc->pipe;
> > > + bool ddb_changed;
> > >
> > > if ((update_pipes & BIT(pipe)) == 0)
> > > continue;
> > >
> > > - if (skl_ddb_allocation_overlaps(&new_crtc_state->wm.skl.ddb,
> > > + if (skl_ddb_allocation_overlaps(&new_entries[pipe],
> > > entries, I915_MAX_PIPES, pipe))
> > > continue;
> > >
> > > - entries[pipe] = new_crtc_state->wm.skl.ddb;
> > > + ddb_changed = !skl_ddb_entry_equal(&new_entries[pipe], &entries[pipe]);
> > > + entries[pipe] = new_entries[pipe];
> > > update_pipes &= ~BIT(pipe);
> > >
> > > - intel_update_crtc(state, crtc);
> > > -
> > > /*
> > > * If this is an already active pipe, it's DDB changed,
> > > * and this isn't the last pipe that needs updating
> > > * then we need to wait for a vblank to pass for the
> > > * new ddb allocation to take effect.
> > > */
> > > - if (!skl_ddb_entry_equal(&new_crtc_state->wm.skl.ddb,
> > > - &old_crtc_state->wm.skl.ddb) &&
> > > - (update_pipes | modeset_pipes))
> > > + if (new_crtc_state->bigjoiner) {
> > > + intel_update_bigjoiner(crtc, state,
> > > + old_crtc_state,
> > > + new_crtc_state);
> > > + } else {
> > > + intel_update_crtc(state, crtc);
> > > + }
> > > +
> > > + if (ddb_changed && (update_pipes | modeset_pipes))
> > > intel_wait_for_vblank(dev_priv, pipe);
> > > }
> > > }
> > > @@ -15863,9 +15950,18 @@ static void skl_commit_modeset_enables(struct intel_atomic_state *state)
> > > if ((modeset_pipes & BIT(pipe)) == 0)
> > > continue;
> > >
> > > + WARN_ON(skl_ddb_allocation_overlaps(&new_entries[pipe],
> > > + entries, I915_MAX_PIPES, pipe));
> > > +
> > > + entries[pipe] = new_entries[pipe];
> > > modeset_pipes &= ~BIT(pipe);
> > >
> > > - intel_enable_crtc(state, crtc);
> > > + if (new_crtc_state->bigjoiner)
> > > + intel_update_bigjoiner(crtc, state,
> > > + old_crtc_state,
> > > + new_crtc_state);
> > > + else
> > > + intel_enable_crtc(state, crtc);
> > > }
> > >
> > > /*
> > > @@ -15877,10 +15973,10 @@ static void skl_commit_modeset_enables(struct intel_atomic_state *state)
> > > if ((update_pipes & BIT(pipe)) == 0)
> > > continue;
> > >
> > > - drm_WARN_ON(&dev_priv->drm, skl_ddb_allocation_overlaps(&new_crtc_state->wm.skl.ddb,
> > > + drm_WARN_ON(&dev_priv->drm, skl_ddb_allocation_overlaps(&new_entries[pipe],
> > > entries, I915_MAX_PIPES, pipe));
> > >
> > > - entries[pipe] = new_crtc_state->wm.skl.ddb;
> > > + entries[pipe] = new_entries[pipe];
> > > update_pipes &= ~BIT(pipe);
> > >
> > > intel_update_crtc(state, crtc);
> > > diff --git a/drivers/gpu/drm/i915/display/intel_sprite.c b/drivers/gpu/drm/i915/display/intel_sprite.c
> > > index 60eeed06a780..eaae5df546fe 100644
> > > --- a/drivers/gpu/drm/i915/display/intel_sprite.c
> > > +++ b/drivers/gpu/drm/i915/display/intel_sprite.c
> > > @@ -99,6 +99,8 @@ void intel_pipe_update_start(const struct intel_crtc_state *new_crtc_state)
> > >
> > > /* FIXME needs to be calibrated sensibly */
> > > min = vblank_start - intel_usecs_to_scanlines(adjusted_mode,
> > > + new_crtc_state->bigjoiner ?
> > > + 2 * VBLANK_EVASION_TIME_US :
> > > VBLANK_EVASION_TIME_US);
> > > max = vblank_start - 1;
> > >
> > > @@ -191,7 +193,8 @@ void intel_pipe_update_start(const struct intel_crtc_state *new_crtc_state)
> > > * re-enables interrupts and verifies the update was actually completed
> > > * before a vblank.
> > > */
> > > -void intel_pipe_update_end(struct intel_crtc_state *new_crtc_state)
> > > +void intel_pipe_update_end(struct intel_crtc_state *new_crtc_state,
> > > + struct intel_crtc_state *slave_crtc_state)
> > > {
> > > struct intel_crtc *crtc = to_intel_crtc(new_crtc_state->uapi.crtc);
> > > enum pipe pipe = crtc->pipe;
> > > @@ -206,16 +209,26 @@ void intel_pipe_update_end(struct intel_crtc_state *new_crtc_state)
> > > * Would be slightly nice to just grab the vblank count and arm the
> > > * event outside of the critical section - the spinlock might spin for a
> > > * while ... */
> > > - if (new_crtc_state->uapi.event) {
> > > - drm_WARN_ON(&dev_priv->drm,
> > > - drm_crtc_vblank_get(&crtc->base) != 0);
> > > + if (new_crtc_state->uapi.event || (slave_crtc_state && slave_crtc_state->uapi.event)) {
> > > + if (new_crtc_state->uapi.event)
> > > + drm_WARN_ON(&dev_priv->drm,
> > > + drm_crtc_vblank_get(&crtc->base) != 0);
> > > + if (slave_crtc_state && slave_crtc_state->uapi.event)
> > > + drm_WARN_ON(&dev_priv->drm,
> > > + drm_crtc_vblank_get(&crtc->base) != 0);
> > >
> > > spin_lock(&crtc->base.dev->event_lock);
> > > - drm_crtc_arm_vblank_event(&crtc->base,
> > > - new_crtc_state->uapi.event);
> > > + if (new_crtc_state->uapi.event)
> > > + drm_crtc_arm_vblank_event(&crtc->base,
> > > + new_crtc_state->uapi.event);
> > > + if (slave_crtc_state && slave_crtc_state->uapi.event)
> > > + drm_crtc_arm_vblank_event(&crtc->base,
> > > + slave_crtc_state->uapi.event);
> > > spin_unlock(&crtc->base.dev->event_lock);
> > >
> > > new_crtc_state->uapi.event = NULL;
> > > + if (slave_crtc_state)
> > > + slave_crtc_state->uapi.event = NULL;
> > > }
> > >
> > > local_irq_enable();
> > > diff --git a/drivers/gpu/drm/i915/display/intel_sprite.h b/drivers/gpu/drm/i915/display/intel_sprite.h
> > > index cd2104ba1ca1..15e7c112ec77 100644
> > > --- a/drivers/gpu/drm/i915/display/intel_sprite.h
> > > +++ b/drivers/gpu/drm/i915/display/intel_sprite.h
> > > @@ -24,7 +24,8 @@ struct intel_plane *intel_sprite_plane_create(struct drm_i915_private *dev_priv,
> > > int intel_sprite_set_colorkey_ioctl(struct drm_device *dev, void *data,
> > > struct drm_file *file_priv);
> > > void intel_pipe_update_start(const struct intel_crtc_state *new_crtc_state);
> > > -void intel_pipe_update_end(struct intel_crtc_state *new_crtc_state);
> > > +void intel_pipe_update_end(struct intel_crtc_state *new_crtc_state,
> > > + struct intel_crtc_state *slave_crtc_state);
> > > int intel_plane_check_stride(const struct intel_plane_state *plane_state);
> > > int intel_plane_check_src_coordinates(struct intel_plane_state *plane_state);
> > > int chv_plane_check_rotation(const struct intel_plane_state *plane_state);
> > > --
> > > 2.19.1
> > >
> > > _______________________________________________
> > > Intel-gfx mailing list
> > > Intel-gfx at lists.freedesktop.org
> > > https://lists.freedesktop.org/mailman/listinfo/intel-gfx
> >
> > --
> > Ville Syrjälä
> > Intel
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