[Intel-gfx] [PATCH 4/4] drm/i915: Remove begin/finish_crtc_commit, v2.
Ville Syrjälä
ville.syrjala at linux.intel.com
Thu Sep 26 12:45:31 UTC 2019
On Wed, Sep 25, 2019 at 02:42:12PM -0700, Matt Roper wrote:
> On Wed, Sep 25, 2019 at 04:59:01PM +0200, Maarten Lankhorst wrote:
> > This can all be done from the intel_update_crtc function. Split out the
> > pipe update into a separate function, just like is done for the planes.
> > Pull in all the changes done during fastset as well. It makes no sense
> > for it to still exist as a separate function.
> >
> > Changes since v1:
> > - Inline intel_update_pipe_config()
> >
> > Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
> > ---
> > drivers/gpu/drm/i915/display/intel_display.c | 197 ++++++++-----------
> > 1 file changed, 86 insertions(+), 111 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
> > index b77574cda648..5a9d06af9f29 100644
> > --- a/drivers/gpu/drm/i915/display/intel_display.c
> > +++ b/drivers/gpu/drm/i915/display/intel_display.c
> > @@ -136,8 +136,6 @@ static void vlv_prepare_pll(struct intel_crtc *crtc,
> > const struct intel_crtc_state *pipe_config);
> > static void chv_prepare_pll(struct intel_crtc *crtc,
> > const struct intel_crtc_state *pipe_config);
> > -static void intel_begin_crtc_commit(struct intel_atomic_state *, struct intel_crtc *);
> > -static void intel_finish_crtc_commit(struct intel_atomic_state *, struct intel_crtc *);
> > static void intel_crtc_init_scalers(struct intel_crtc *crtc,
> > struct intel_crtc_state *crtc_state);
> > static void skylake_pfit_enable(const struct intel_crtc_state *crtc_state);
> > @@ -4409,45 +4407,6 @@ static void icl_set_pipe_chicken(struct intel_crtc *crtc)
> > I915_WRITE(PIPE_CHICKEN(pipe), tmp);
> > }
> >
> > -static void intel_update_pipe_config(const struct intel_crtc_state *old_crtc_state,
> > - const struct intel_crtc_state *new_crtc_state)
> > -{
> > - struct intel_crtc *crtc = to_intel_crtc(new_crtc_state->uapi.crtc);
> > - struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
> > -
> > - /* drm_atomic_helper_update_legacy_modeset_state might not be called. */
> > - crtc->base.mode = new_crtc_state->uapi.mode;
> > -
> > - /*
> > - * Update pipe size and adjust fitter if needed: the reason for this is
> > - * that in compute_mode_changes we check the native mode (not the pfit
> > - * mode) to see if we can flip rather than do a full mode set. In the
> > - * fastboot case, we'll flip, but if we don't update the pipesrc and
> > - * pfit state, we'll end up with a big fb scanned out into the wrong
> > - * sized surface.
> > - */
> > -
> > - I915_WRITE(PIPESRC(crtc->pipe),
> > - ((new_crtc_state->pipe_src_w - 1) << 16) |
> > - (new_crtc_state->pipe_src_h - 1));
> > -
> > - /* on skylake this is done by detaching scalers */
> > - if (INTEL_GEN(dev_priv) >= 9) {
> > - skl_detach_scalers(new_crtc_state);
> > -
> > - if (new_crtc_state->pch_pfit.enabled)
> > - skylake_pfit_enable(new_crtc_state);
> > - } else if (HAS_PCH_SPLIT(dev_priv)) {
> > - if (new_crtc_state->pch_pfit.enabled)
> > - ironlake_pfit_enable(new_crtc_state);
> > - else if (old_crtc_state->pch_pfit.enabled)
> > - ironlake_pfit_disable(old_crtc_state);
> > - }
> > -
> > - if (INTEL_GEN(dev_priv) >= 11)
> > - icl_set_pipe_chicken(crtc);
> > -}
> > -
> > static void intel_fdi_normal_train(struct intel_crtc *crtc)
> > {
> > struct drm_device *dev = crtc->base.dev;
> > @@ -13739,13 +13698,88 @@ u32 intel_crtc_get_vblank_counter(struct intel_crtc *crtc)
> > return crtc->base.funcs->get_vblank_counter(&crtc->base);
> > }
> >
> > +void intel_crtc_arm_fifo_underrun(struct intel_crtc *crtc,
> > + struct intel_crtc_state *crtc_state)
> > +{
> > + struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
> > +
> > + if (!IS_GEN(dev_priv, 2))
> > + intel_set_cpu_fifo_underrun_reporting(dev_priv, crtc->pipe, true);
> > +
> > + if (crtc_state->has_pch_encoder) {
> > + enum pipe pch_transcoder =
> > + intel_crtc_pch_transcoder(crtc);
> > +
> > + intel_set_pch_fifo_underrun_reporting(dev_priv, pch_transcoder, true);
> > + }
> > +}
> > +
> > +static void commit_pipe_config(struct intel_atomic_state *state,
> > + struct intel_crtc_state *old_crtc_state,
> > + struct intel_crtc_state *new_crtc_state)
> > +{
> > + struct intel_crtc *crtc = to_intel_crtc(new_crtc_state->uapi.crtc);
> > + struct drm_i915_private *dev_priv = to_i915(state->base.dev);
> > + bool modeset = needs_modeset(new_crtc_state);
> > +
> > + if (!modeset) {
> > + if (new_crtc_state->uapi.color_mgmt_changed ||
> > + new_crtc_state->update_pipe)
> > + intel_color_commit(new_crtc_state);
> > +
> > + if (INTEL_GEN(dev_priv) >= 9)
> > + skl_detach_scalers(new_crtc_state);
> > +
> > + if (new_crtc_state->update_pipe) {
> > + /* drm_atomic_helper_update_legacy_modeset_state might not be called. */
> > + crtc->base.mode = new_crtc_state->uapi.mode;
> > +
> > + /*
> > + * Update pipe size and adjust fitter if needed: the reason for this is
> > + * that in compute_mode_changes we check the native mode (not the pfit
> > + * mode) to see if we can flip rather than do a full mode set. In the
> > + * fastboot case, we'll flip, but if we don't update the pipesrc and
> > + * pfit state, we'll end up with a big fb scanned out into the wrong
> > + * sized surface.
> > + */
> > +
> > + I915_WRITE(PIPESRC(crtc->pipe),
> > + ((new_crtc_state->pipe_src_w - 1) << 16) |
> > + (new_crtc_state->pipe_src_h - 1));
>
> intel_set_pipe_src_size(new_crtc_state);
>
> to be more future-proof in case the register changes in the future.
>
> > +
> > + if (INTEL_GEN(dev_priv) >= 9) {
> > + /*
> > + * enable pipe scaler here if needed, if
> > + * it's disabled, that's done by
> > + * skl_detach_scalers() above.
> > + */
> > + skylake_pfit_enable(new_crtc_state);
> > + } else if (HAS_PCH_SPLIT(dev_priv)) {
> > + if (!new_crtc_state->pch_pfit.enabled)
> > + ironlake_pfit_disable(old_crtc_state);
> > + else
> > + ironlake_pfit_enable(new_crtc_state);
> > + }
> > +
> > + if (INTEL_GEN(dev_priv) >= 11)
> > + icl_set_pipe_chicken(crtc);
> > + }
> > +
> > + if (INTEL_GEN(dev_priv) >= 9 || IS_BROADWELL(dev_priv))
> > + bdw_set_pipemisc(new_crtc_state);
> > + }
> > +
> > + if (dev_priv->display.atomic_update_watermarks)
> > + dev_priv->display.atomic_update_watermarks(state,
> > + new_crtc_state);
>
> It might make sense to move the watermark update out to the caller. The
> watermark registers themselves are plane-based, so dealing with them in
> the commit_pipe_config function is already slightly non-intuitive.
This one actually just does the linetime wm on skl+. We should probably
just move that into some other place so we could get rid of this hook on
those platforms.
> Plus
> that will let us just do a
>
> /*
> * During modesets pipe configuration was programmed as the
> * CRTC was enabled.
> */
> if (!modeset)
> return;
>
> and drop a level of nesting for the rest of this function.
>
>
> > +}
> > +
> > static void intel_update_crtc(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_device *dev = state->base.dev;
> > - struct drm_i915_private *dev_priv = to_i915(dev);
> > + struct drm_i915_private *dev_priv = to_i915(state->base.dev);
> > bool modeset = needs_modeset(new_crtc_state);
> > struct intel_plane_state *new_plane_state =
> > intel_atomic_get_new_plane_state(state,
> > @@ -13769,14 +13803,21 @@ static void intel_update_crtc(struct intel_crtc *crtc,
> > else if (new_plane_state)
> > intel_fbc_enable(crtc, new_crtc_state, new_plane_state);
> >
> > - intel_begin_crtc_commit(state, crtc);
> > + /* Perform vblank evasion around commit operation */
> > + intel_pipe_update_start(new_crtc_state);
> > +
> > + commit_pipe_config(state, old_crtc_state, new_crtc_state);
> >
> > if (INTEL_GEN(dev_priv) >= 9)
> > skl_update_planes_on_crtc(state, crtc);
> > else
> > i9xx_update_planes_on_crtc(state, crtc);
> >
> > - intel_finish_crtc_commit(state, crtc);
> > + intel_pipe_update_end(new_crtc_state);
> > +
> > + if (new_crtc_state->update_pipe && !modeset &&
> > + old_crtc_state->hw.mode.private_flags & I915_MODE_FLAG_INHERITED)
> > + intel_crtc_arm_fifo_underrun(crtc, new_crtc_state);
>
> It might be worth adding a comment to this block. I always have to go
> dig back through git history to remind myself we this is needed. Maybe
> something like:
>
> /*
> * We usually enable FIFO underrun interrupts as part of the
> * CRTC enable sequence during modesets. But when we inherit a
> * valid pipe configuration from the BIOS we need to take care
> * of enabling them on the CRTC's first fastset.
> */
>
>
> Matt
>
> > }
> >
> > static void intel_old_crtc_state_disables(struct intel_atomic_state *state,
> > @@ -14573,72 +14614,6 @@ skl_max_scale(const struct intel_crtc_state *crtc_state,
> > return max_scale;
> > }
> >
> > -static void intel_begin_crtc_commit(struct intel_atomic_state *state,
> > - struct intel_crtc *crtc)
> > -{
> > - struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
> > - struct intel_crtc_state *old_crtc_state =
> > - intel_atomic_get_old_crtc_state(state, crtc);
> > - struct intel_crtc_state *new_crtc_state =
> > - intel_atomic_get_new_crtc_state(state, crtc);
> > - bool modeset = needs_modeset(new_crtc_state);
> > -
> > - /* Perform vblank evasion around commit operation */
> > - intel_pipe_update_start(new_crtc_state);
> > -
> > - if (modeset)
> > - goto out;
> > -
> > - if (new_crtc_state->uapi.color_mgmt_changed ||
> > - new_crtc_state->update_pipe)
> > - intel_color_commit(new_crtc_state);
> > -
> > - if (new_crtc_state->update_pipe)
> > - intel_update_pipe_config(old_crtc_state, new_crtc_state);
> > - else if (INTEL_GEN(dev_priv) >= 9)
> > - skl_detach_scalers(new_crtc_state);
> > -
> > - if (INTEL_GEN(dev_priv) >= 9 || IS_BROADWELL(dev_priv))
> > - bdw_set_pipemisc(new_crtc_state);
> > -
> > -out:
> > - if (dev_priv->display.atomic_update_watermarks)
> > - dev_priv->display.atomic_update_watermarks(state,
> > - new_crtc_state);
> > -}
> > -
> > -void intel_crtc_arm_fifo_underrun(struct intel_crtc *crtc,
> > - struct intel_crtc_state *crtc_state)
> > -{
> > - struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
> > -
> > - if (!IS_GEN(dev_priv, 2))
> > - intel_set_cpu_fifo_underrun_reporting(dev_priv, crtc->pipe, true);
> > -
> > - if (crtc_state->has_pch_encoder) {
> > - enum pipe pch_transcoder =
> > - intel_crtc_pch_transcoder(crtc);
> > -
> > - intel_set_pch_fifo_underrun_reporting(dev_priv, pch_transcoder, true);
> > - }
> > -}
> > -
> > -static void intel_finish_crtc_commit(struct intel_atomic_state *state,
> > - struct intel_crtc *crtc)
> > -{
> > - struct intel_crtc_state *old_crtc_state =
> > - intel_atomic_get_old_crtc_state(state, crtc);
> > - struct intel_crtc_state *new_crtc_state =
> > - intel_atomic_get_new_crtc_state(state, crtc);
> > -
> > - intel_pipe_update_end(new_crtc_state);
> > -
> > - if (new_crtc_state->update_pipe &&
> > - !needs_modeset(new_crtc_state) &&
> > - old_crtc_state->hw.mode.private_flags & I915_MODE_FLAG_INHERITED)
> > - intel_crtc_arm_fifo_underrun(crtc, new_crtc_state);
> > -}
> > -
> > /**
> > * intel_plane_destroy - destroy a plane
> > * @plane: plane to destroy
> > --
> > 2.20.1
> >
> > _______________________________________________
> > Intel-gfx mailing list
> > Intel-gfx at lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/intel-gfx
>
> --
> Matt Roper
> Graphics Software Engineer
> VTT-OSGC Platform Enablement
> Intel Corporation
> (916) 356-2795
> _______________________________________________
> 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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