On Mon, Sep 20, 2021 at 12:52:15AM -0700, Navare, Manasi wrote:
> On Mon, Sep 13, 2021 at 05:44:26PM +0300, Ville Syrjala wrote:
> > From: Ville Syrjälä <ville.syrj...@linux.intel.com>
> >
> > Let's disable planes on all pipes affected by the modeset before
> > we start doing the actual modeset. This means we have less
> > random planes enabled during the modeset, and it also mirrors
> > what we already do when enabling pipes on skl+ since we enable
> > planes on all pipes as the very last step. As a bonus we also
> > nuke a bunch og bigjoiner special casing.
> >
> > I've occasionally pondered about going even furher here and
> > doing the pre_plane_update() stuff for all pipes first, then
> > actually disabling the planes, and finally running the rest
> > of the modeset sequence. This would potentially allow
> > parallelizing all the extra vblank waits across multiple pipes,
> > and would make the plane disable even more atomic. But let's
> > go one step a time here.
>
> So you are moving the plane disables all together in the commit_disables()?
> But dont we need to pass old_crtc_state->bigjoiner_linked_crtc) crtc in case
> of bigjoiner?
> How is that handled?
Whether bigjoiner is used or not is irrelevant when disabling the
planes.
>
> Regards
> Manasi
>
> >
> > Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
> > ---
> > drivers/gpu/drm/i915/display/intel_display.c | 28 +++++++++-----------
> > 1 file changed, 13 insertions(+), 15 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_display.c
> > b/drivers/gpu/drm/i915/display/intel_display.c
> > index cd150512d275..afa26911c236 100644
> > --- a/drivers/gpu/drm/i915/display/intel_display.c
> > +++ b/drivers/gpu/drm/i915/display/intel_display.c
> > @@ -9785,18 +9785,13 @@ static void intel_old_crtc_state_disables(struct
> > intel_atomic_state *state,
> >
> > drm_WARN_ON(&dev_priv->drm, old_crtc_state->bigjoiner_slave);
> >
> > - intel_crtc_disable_planes(state, crtc);
> > -
> > /*
> > * We still need special handling for disabling bigjoiner master
> > * and slaves since for slave we do not have encoder or plls
> > * so we dont need to disable those.
> > */
> > - if (old_crtc_state->bigjoiner) {
> > - intel_crtc_disable_planes(state,
> > -
> > old_crtc_state->bigjoiner_linked_crtc);
> > + if (old_crtc_state->bigjoiner)
> > old_crtc_state->bigjoiner_linked_crtc->active = false;
> > - }
> >
> > /*
> > * We need to disable pipe CRC before disabling the pipe,
> > @@ -9823,6 +9818,18 @@ static void intel_commit_modeset_disables(struct
> > intel_atomic_state *state)
> > u32 handled = 0;
> > int i;
> >
> > + for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
> > + new_crtc_state, i) {
> > + if (!intel_crtc_needs_modeset(new_crtc_state))
> > + continue;
> > +
> > + if (!old_crtc_state->hw.active)
> > + continue;
> > +
> > + intel_pre_plane_update(state, crtc);
> > + intel_crtc_disable_planes(state, crtc);
> > + }
> > +
> > /* Only disable port sync and MST slaves */
> > for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
> > new_crtc_state, i) {
> > @@ -9841,7 +9848,6 @@ static void intel_commit_modeset_disables(struct
> > intel_atomic_state *state)
> > !intel_dp_mst_is_slave_trans(old_crtc_state))
> > continue;
> >
> > - intel_pre_plane_update(state, crtc);
> > intel_old_crtc_state_disables(state, old_crtc_state,
> > new_crtc_state, crtc);
> > handled |= BIT(crtc->pipe);
> > @@ -9855,14 +9861,6 @@ static void intel_commit_modeset_disables(struct
> > intel_atomic_state *state)
> > old_crtc_state->bigjoiner_slave)
> > continue;
> >
> > - intel_pre_plane_update(state, crtc);
> > - if (old_crtc_state->bigjoiner) {
> > - struct intel_crtc *slave =
> > - old_crtc_state->bigjoiner_linked_crtc;
> > -
> > - intel_pre_plane_update(state, slave);
> > - }
> > -
> > if (old_crtc_state->hw.active)
> > intel_old_crtc_state_disables(state, old_crtc_state,
> > new_crtc_state, crtc);
> > --
> > 2.32.0
> >
--
Ville Syrjälä
Intel
