Op 12-12-16 om 21:35 schreef [email protected]: > From: Ville Syrjälä <[email protected]> > > Check whether anything relevant has actually change when we compute new > watermarks for each plane in the state. If the watermarks for no > primary/sprite planes changed we don't have to recompute the FIFO split > or reprogram the DSBARB registers. And even the cursor watermarks didn't > change we can skip the merge+invert step between all the planes on > the pipe as well. > > Signed-off-by: Ville Syrjälä <[email protected]> > --- > drivers/gpu/drm/i915/intel_atomic.c | 1 + > drivers/gpu/drm/i915/intel_drv.h | 1 + > drivers/gpu/drm/i915/intel_pm.c | 73 > +++++++++++++++++++++++++++++-------- > 3 files changed, 60 insertions(+), 15 deletions(-) > > diff --git a/drivers/gpu/drm/i915/intel_atomic.c > b/drivers/gpu/drm/i915/intel_atomic.c > index c5a166752eda..df33f270b459 100644 > --- a/drivers/gpu/drm/i915/intel_atomic.c > +++ b/drivers/gpu/drm/i915/intel_atomic.c > @@ -99,6 +99,7 @@ intel_crtc_duplicate_state(struct drm_crtc *crtc) > crtc_state->update_wm_pre = false; > crtc_state->update_wm_post = false; > crtc_state->fb_changed = false; > + crtc_state->fifo_changed = false; > crtc_state->wm.need_postvbl_update = false; > crtc_state->fb_bits = 0; This flag is only used in intel_pm.c, maybe put it in crtc_state->wm.vlv.fifo_changed, and clear it in the beginning of the wm recalculation? > diff --git a/drivers/gpu/drm/i915/intel_drv.h > b/drivers/gpu/drm/i915/intel_drv.h > index 66668c18a47a..a92857864ee8 100644 > --- a/drivers/gpu/drm/i915/intel_drv.h > +++ b/drivers/gpu/drm/i915/intel_drv.h > @@ -560,6 +560,7 @@ struct intel_crtc_state { > bool disable_cxsr; > bool update_wm_pre, update_wm_post; /* watermarks are updated */ > bool fb_changed; /* fb on any of the planes is changed */ > + bool fifo_changed; /* FIFO split is changed */ > > /* Pipe source size (ie. panel fitter input size) > * All planes will be positioned inside this space, > diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c > index f68b46eed224..c7cc62cf51f6 100644 > --- a/drivers/gpu/drm/i915/intel_pm.c > +++ b/drivers/gpu/drm/i915/intel_pm.c > @@ -1103,31 +1103,36 @@ static u16 vlv_invert_wm_value(u16 wm, u16 fifo_size) > } > > /* starting from 'level' set all higher levels to 'value' */ > -static void vlv_plane_wm_set(struct intel_crtc_state *crtc_state, > +static bool vlv_plane_wm_set(struct intel_crtc_state *crtc_state, > int level, enum plane_id plane_id, u16 value) > { > struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev); > int num_levels = vlv_num_wm_levels(dev_priv); > + bool dirty = false; > > for (; level < num_levels; level++) { > struct vlv_pipe_wm *noninverted = > &crtc_state->wm.vlv.noninverted[level]; > > + dirty |= noninverted->plane[plane_id] != value; > noninverted->plane[plane_id] = value; > } > + > + return dirty; > } > > -static void vlv_plane_wm_compute(struct intel_crtc_state *crtc_state, > +static bool vlv_plane_wm_compute(struct intel_crtc_state *crtc_state, > const struct intel_plane_state *plane_state) > { > struct intel_plane *plane = to_intel_plane(plane_state->base.plane); > enum plane_id plane_id = plane->id; > int num_levels = vlv_num_wm_levels(to_i915(plane->base.dev)); > int level; > + bool dirty = false; > > if (!plane_state->base.visible) { > - vlv_plane_wm_set(crtc_state, 0, plane_id, 0); > - return; > + dirty |= vlv_plane_wm_set(crtc_state, 0, plane_id, 0); > + goto out; > } > > for (level = 0; level < num_levels; level++) { > @@ -1143,17 +1148,22 @@ static void vlv_plane_wm_compute(struct > intel_crtc_state *crtc_state, > if (wm > max_wm) > break; > > + dirty |= noninverted->plane[plane_id] != wm; > noninverted->plane[plane_id] = wm; > } > > /* mark all higher levels as invalid */ > - vlv_plane_wm_set(crtc_state, level, plane_id, USHRT_MAX); > + dirty |= vlv_plane_wm_set(crtc_state, level, plane_id, USHRT_MAX); > > - DRM_DEBUG_KMS("%s wms: [0]=%d,[1]=%d,[2]=%d\n", > - plane->base.name, > - > crtc_state->wm.vlv.noninverted[VLV_WM_LEVEL_PM2].plane[plane_id], > - > crtc_state->wm.vlv.noninverted[VLV_WM_LEVEL_PM5].plane[plane_id], > - > crtc_state->wm.vlv.noninverted[VLV_WM_LEVEL_DDR_DVFS].plane[plane_id]); > +out: > + if (dirty) > + DRM_DEBUG_KMS("%s wms: [0]=%d,[1]=%d,[2]=%d\n", > + plane->base.name, > + > crtc_state->wm.vlv.noninverted[VLV_WM_LEVEL_PM2].plane[plane_id], > + > crtc_state->wm.vlv.noninverted[VLV_WM_LEVEL_PM5].plane[plane_id], > + > crtc_state->wm.vlv.noninverted[VLV_WM_LEVEL_DDR_DVFS].plane[plane_id]); > + > + return dirty; > } > > static bool vlv_plane_wm_is_valid(const struct intel_crtc_state *crtc_state, > @@ -1186,10 +1196,12 @@ static int vlv_compute_pipe_wm(struct > intel_crtc_state *crtc_state) > &crtc_state->wm.vlv.fifo_state; > int num_active_planes = hweight32(crtc_state->active_planes & > ~BIT(PLANE_CURSOR)); > + bool needs_modeset = drm_atomic_crtc_needs_modeset(&crtc_state->base); > struct intel_plane_state *plane_state; > struct intel_plane *plane; > enum plane_id plane_id; > int level, ret, i; > + unsigned int dirty = 0; > > for_each_intel_plane_in_state(state, plane, plane_state, i) { > const struct intel_plane_state *old_plane_state = > @@ -1199,7 +1211,37 @@ static int vlv_compute_pipe_wm(struct intel_crtc_state > *crtc_state) > old_plane_state->base.crtc != &crtc->base) > continue; > > - vlv_plane_wm_compute(crtc_state, plane_state); > + if (vlv_plane_wm_compute(crtc_state, plane_state)) > + dirty |= BIT(plane->id); > + } > + > + /* > + * DSPARB registers may have been reset due to the > + * power well being turned off. Make sure we restore > + * them to a consistent state even if no primary/sprite > + * planes are initially active. > + */ > + if (needs_modeset) > + crtc_state->fifo_changed = true; > + > + if (!dirty) > + return 0; > + > + /* cursor changes don't warrant a FIFO recompute */ > + if (dirty & ~BIT(PLANE_CURSOR)) { > + const struct intel_crtc_state *old_crtc_state = > + to_intel_crtc_state(crtc->base.state); > + const struct vlv_fifo_state *old_fifo_state = > + &old_crtc_state->wm.vlv.fifo_state; > + > + ret = vlv_compute_fifo(crtc_state); > + if (ret) > + return ret; > + > + if (needs_modeset || > + memcmp(old_fifo_state, fifo_state, > + sizeof(*fifo_state)) != 0) > + crtc_state->fifo_changed = true; > } > > /* initially allow all levels */ > @@ -1212,10 +1254,6 @@ static int vlv_compute_pipe_wm(struct intel_crtc_state > *crtc_state) > wm_state->cxsr = crtc->pipe != PIPE_C && > crtc->wm.cxsr_allowed && num_active_planes == 1; > > - ret = vlv_compute_fifo(crtc_state); > - if (ret) > - return ret; > - > for (level = 0; level < wm_state->num_levels; level++) { > const struct vlv_pipe_wm *noninverted = > &crtc_state->wm.vlv.noninverted[level]; > @@ -1265,6 +1303,9 @@ static void vlv_atomic_update_fifo(struct > intel_atomic_state *state, > &crtc_state->wm.vlv.fifo_state; > int sprite0_start, sprite1_start, fifo_size; > > + if (!crtc_state->fifo_changed) > + return; > + > sprite0_start = fifo_state->plane[PLANE_PRIMARY]; > sprite1_start = fifo_state->plane[PLANE_SPRITE0] + sprite0_start; > fifo_size = fifo_state->plane[PLANE_SPRITE1] + sprite1_start; > @@ -4631,6 +4672,8 @@ void vlv_wm_get_hw_state(struct drm_device *dev) > active->num_levels = wm->level + 1; > active->cxsr = wm->cxsr; > > + vlv_get_fifo_size(crtc_state); > + > /* FIXME sanitize things more */ > for (level = 0; level < active->num_levels; level++) { > struct vlv_pipe_wm *noninverted =
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