diff options
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 93 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_drv.h | 7 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_pm.c | 200 |
3 files changed, 132 insertions, 168 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 30372f9fcf66..a388ed547f73 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -13458,16 +13458,23 @@ static void verify_wm_state(struct drm_crtc *crtc, hw_entry->start, hw_entry->end); } - /* cursor */ - hw_entry = &hw_ddb.plane[pipe][PLANE_CURSOR]; - sw_entry = &sw_ddb->plane[pipe][PLANE_CURSOR]; - - if (!skl_ddb_entry_equal(hw_entry, sw_entry)) { - DRM_ERROR("mismatch in DDB state pipe %c cursor " - "(expected (%u,%u), found (%u,%u))\n", - pipe_name(pipe), - sw_entry->start, sw_entry->end, - hw_entry->start, hw_entry->end); + /* + * cursor + * If the cursor plane isn't active, we may not have updated it's ddb + * allocation. In that case since the ddb allocation will be updated + * once the plane becomes visible, we can skip this check + */ + if (intel_crtc->cursor_addr) { + hw_entry = &hw_ddb.plane[pipe][PLANE_CURSOR]; + sw_entry = &sw_ddb->plane[pipe][PLANE_CURSOR]; + + if (!skl_ddb_entry_equal(hw_entry, sw_entry)) { + DRM_ERROR("mismatch in DDB state pipe %c cursor " + "(expected (%u,%u), found (%u,%u))\n", + pipe_name(pipe), + sw_entry->start, sw_entry->end, + hw_entry->start, hw_entry->end); + } } } @@ -14219,6 +14226,65 @@ static void intel_update_crtcs(struct drm_atomic_state *state, } } +static void skl_update_crtcs(struct drm_atomic_state *state, + unsigned int *crtc_vblank_mask) +{ + struct drm_device *dev = state->dev; + struct drm_i915_private *dev_priv = to_i915(dev); + struct intel_atomic_state *intel_state = to_intel_atomic_state(state); + struct drm_crtc *crtc; + struct drm_crtc_state *old_crtc_state; + struct skl_ddb_allocation *new_ddb = &intel_state->wm_results.ddb; + struct skl_ddb_allocation *cur_ddb = &dev_priv->wm.skl_hw.ddb; + unsigned int updated = 0; + bool progress; + enum pipe pipe; + + /* + * Whenever the number of active pipes changes, we need to make sure we + * update the pipes in the right order so that their ddb allocations + * never overlap with eachother inbetween CRTC updates. Otherwise we'll + * cause pipe underruns and other bad stuff. + */ + do { + int i; + progress = false; + + for_each_crtc_in_state(state, crtc, old_crtc_state, i) { + bool vbl_wait = false; + unsigned int cmask = drm_crtc_mask(crtc); + pipe = to_intel_crtc(crtc)->pipe; + + if (updated & cmask || !crtc->state->active) + continue; + if (skl_ddb_allocation_overlaps(state, cur_ddb, new_ddb, + pipe)) + continue; + + updated |= cmask; + + /* + * 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_allocation_equals(cur_ddb, new_ddb, pipe) && + !crtc->state->active_changed && + intel_state->wm_results.dirty_pipes != updated) + vbl_wait = true; + + intel_update_crtc(crtc, state, old_crtc_state, + crtc_vblank_mask); + + if (vbl_wait) + intel_wait_for_vblank(dev, pipe); + + progress = true; + } + } while (progress); +} + static void intel_atomic_commit_tail(struct drm_atomic_state *state) { struct drm_device *dev = state->dev; @@ -15851,8 +15917,6 @@ void intel_init_display_hooks(struct drm_i915_private *dev_priv) dev_priv->display.crtc_disable = i9xx_crtc_disable; } - dev_priv->display.update_crtcs = intel_update_crtcs; - /* Returns the core display clock speed */ if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) dev_priv->display.get_display_clock_speed = @@ -15942,6 +16006,11 @@ void intel_init_display_hooks(struct drm_i915_private *dev_priv) skl_modeset_calc_cdclk; } + if (dev_priv->info.gen >= 9) + dev_priv->display.update_crtcs = skl_update_crtcs; + else + dev_priv->display.update_crtcs = intel_update_crtcs; + switch (INTEL_INFO(dev_priv)->gen) { case 2: dev_priv->display.queue_flip = intel_gen2_queue_flip; diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index f241a47b6e3a..debbc1b5b0f9 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -1745,6 +1745,13 @@ void skl_ddb_get_hw_state(struct drm_i915_private *dev_priv, bool skl_can_enable_sagv(struct drm_atomic_state *state); int skl_enable_sagv(struct drm_i915_private *dev_priv); int skl_disable_sagv(struct drm_i915_private *dev_priv); +bool skl_ddb_allocation_equals(const struct skl_ddb_allocation *old, + const struct skl_ddb_allocation *new, + enum pipe pipe); +bool skl_ddb_allocation_overlaps(struct drm_atomic_state *state, + const struct skl_ddb_allocation *old, + const struct skl_ddb_allocation *new, + enum pipe pipe); void skl_write_cursor_wm(struct intel_crtc *intel_crtc, const struct skl_wm_values *wm); void skl_write_plane_wm(struct intel_crtc *intel_crtc, diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 2f4438d4af55..729d952174d8 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -3851,6 +3851,11 @@ void skl_write_plane_wm(struct intel_crtc *intel_crtc, wm->plane[pipe][plane][level]); } I915_WRITE(PLANE_WM_TRANS(pipe, plane), wm->plane_trans[pipe][plane]); + + skl_ddb_entry_write(dev_priv, PLANE_BUF_CFG(pipe, plane), + &wm->ddb.plane[pipe][plane]); + skl_ddb_entry_write(dev_priv, PLANE_NV12_BUF_CFG(pipe, plane), + &wm->ddb.y_plane[pipe][plane]); } void skl_write_cursor_wm(struct intel_crtc *intel_crtc, @@ -3867,170 +3872,46 @@ void skl_write_cursor_wm(struct intel_crtc *intel_crtc, wm->plane[pipe][PLANE_CURSOR][level]); } I915_WRITE(CUR_WM_TRANS(pipe), wm->plane_trans[pipe][PLANE_CURSOR]); -} - -static void skl_write_wm_values(struct drm_i915_private *dev_priv, - const struct skl_wm_values *new) -{ - struct drm_device *dev = &dev_priv->drm; - struct intel_crtc *crtc; - - for_each_intel_crtc(dev, crtc) { - int i; - enum pipe pipe = crtc->pipe; - - if ((new->dirty_pipes & drm_crtc_mask(&crtc->base)) == 0) - continue; - if (!crtc->active) - continue; - - for (i = 0; i < intel_num_planes(crtc); i++) { - skl_ddb_entry_write(dev_priv, - PLANE_BUF_CFG(pipe, i), - &new->ddb.plane[pipe][i]); - skl_ddb_entry_write(dev_priv, - PLANE_NV12_BUF_CFG(pipe, i), - &new->ddb.y_plane[pipe][i]); - } - skl_ddb_entry_write(dev_priv, CUR_BUF_CFG(pipe), - &new->ddb.plane[pipe][PLANE_CURSOR]); - } + skl_ddb_entry_write(dev_priv, CUR_BUF_CFG(pipe), + &wm->ddb.plane[pipe][PLANE_CURSOR]); } -/* - * When setting up a new DDB allocation arrangement, we need to correctly - * sequence the times at which the new allocations for the pipes are taken into - * account or we'll have pipes fetching from space previously allocated to - * another pipe. - * - * Roughly the sequence looks like: - * 1. re-allocate the pipe(s) with the allocation being reduced and not - * overlapping with a previous light-up pipe (another way to put it is: - * pipes with their new allocation strickly included into their old ones). - * 2. re-allocate the other pipes that get their allocation reduced - * 3. allocate the pipes having their allocation increased - * - * Steps 1. and 2. are here to take care of the following case: - * - Initially DDB looks like this: - * | B | C | - * - enable pipe A. - * - pipe B has a reduced DDB allocation that overlaps with the old pipe C - * allocation - * | A | B | C | - * - * We need to sequence the re-allocation: C, B, A (and not B, C, A). - */ - -static void -skl_wm_flush_pipe(struct drm_i915_private *dev_priv, enum pipe pipe, int pass) +bool skl_ddb_allocation_equals(const struct skl_ddb_allocation *old, + const struct skl_ddb_allocation *new, + enum pipe pipe) { - int plane; - - DRM_DEBUG_KMS("flush pipe %c (pass %d)\n", pipe_name(pipe), pass); - - for_each_plane(dev_priv, pipe, plane) { - I915_WRITE(PLANE_SURF(pipe, plane), - I915_READ(PLANE_SURF(pipe, plane))); - } - I915_WRITE(CURBASE(pipe), I915_READ(CURBASE(pipe))); + return new->pipe[pipe].start == old->pipe[pipe].start && + new->pipe[pipe].end == old->pipe[pipe].end; } -static bool -skl_ddb_allocation_included(const struct skl_ddb_allocation *old, - const struct skl_ddb_allocation *new, - enum pipe pipe) +static inline bool skl_ddb_entries_overlap(const struct skl_ddb_entry *a, + const struct skl_ddb_entry *b) { - uint16_t old_size, new_size; - - old_size = skl_ddb_entry_size(&old->pipe[pipe]); - new_size = skl_ddb_entry_size(&new->pipe[pipe]); - - return old_size != new_size && - new->pipe[pipe].start >= old->pipe[pipe].start && - new->pipe[pipe].end <= old->pipe[pipe].end; + return a->start < b->end && b->start < a->end; } -static void skl_flush_wm_values(struct drm_i915_private *dev_priv, - struct skl_wm_values *new_values) +bool skl_ddb_allocation_overlaps(struct drm_atomic_state *state, + const struct skl_ddb_allocation *old, + const struct skl_ddb_allocation *new, + enum pipe pipe) { - struct drm_device *dev = &dev_priv->drm; - struct skl_ddb_allocation *cur_ddb, *new_ddb; - bool reallocated[I915_MAX_PIPES] = {}; - struct intel_crtc *crtc; - enum pipe pipe; - - new_ddb = &new_values->ddb; - cur_ddb = &dev_priv->wm.skl_hw.ddb; - - /* - * First pass: flush the pipes with the new allocation contained into - * the old space. - * - * We'll wait for the vblank on those pipes to ensure we can safely - * re-allocate the freed space without this pipe fetching from it. - */ - for_each_intel_crtc(dev, crtc) { - if (!crtc->active) - continue; - - pipe = crtc->pipe; - - if (!skl_ddb_allocation_included(cur_ddb, new_ddb, pipe)) - continue; - - skl_wm_flush_pipe(dev_priv, pipe, 1); - intel_wait_for_vblank(dev, pipe); - - reallocated[pipe] = true; - } - - - /* - * Second pass: flush the pipes that are having their allocation - * reduced, but overlapping with a previous allocation. - * - * Here as well we need to wait for the vblank to make sure the freed - * space is not used anymore. - */ - for_each_intel_crtc(dev, crtc) { - if (!crtc->active) - continue; + struct drm_device *dev = state->dev; + struct intel_crtc *intel_crtc; + enum pipe otherp; - pipe = crtc->pipe; + for_each_intel_crtc(dev, intel_crtc) { + otherp = intel_crtc->pipe; - if (reallocated[pipe]) + if (otherp == pipe) continue; - if (skl_ddb_entry_size(&new_ddb->pipe[pipe]) < - skl_ddb_entry_size(&cur_ddb->pipe[pipe])) { - skl_wm_flush_pipe(dev_priv, pipe, 2); - intel_wait_for_vblank(dev, pipe); - reallocated[pipe] = true; - } + if (skl_ddb_entries_overlap(&new->pipe[pipe], + &old->pipe[otherp])) + return true; } - /* - * Third pass: flush the pipes that got more space allocated. - * - * We don't need to actively wait for the update here, next vblank - * will just get more DDB space with the correct WM values. - */ - for_each_intel_crtc(dev, crtc) { - if (!crtc->active) - continue; - - pipe = crtc->pipe; - - /* - * At this point, only the pipes more space than before are - * left to re-allocate. - */ - if (reallocated[pipe]) - continue; - - skl_wm_flush_pipe(dev_priv, pipe, 3); - } + return false; } static int skl_update_pipe_wm(struct drm_crtc_state *cstate, @@ -4232,7 +4113,7 @@ static void skl_update_wm(struct drm_crtc *crtc) struct skl_wm_values *hw_vals = &dev_priv->wm.skl_hw; struct intel_crtc_state *cstate = to_intel_crtc_state(crtc->state); struct skl_pipe_wm *pipe_wm = &cstate->wm.skl.optimal; - int pipe; + enum pipe pipe = intel_crtc->pipe; if ((results->dirty_pipes & drm_crtc_mask(crtc)) == 0) return; @@ -4241,15 +4122,22 @@ static void skl_update_wm(struct drm_crtc *crtc) mutex_lock(&dev_priv->wm.wm_mutex); - skl_write_wm_values(dev_priv, results); - skl_flush_wm_values(dev_priv, results); - /* - * Store the new configuration (but only for the pipes that have - * changed; the other values weren't recomputed). + * If this pipe isn't active already, we're going to be enabling it + * very soon. Since it's safe to update a pipe's ddb allocation while + * the pipe's shut off, just do so here. Already active pipes will have + * their watermarks updated once we update their planes. */ - for_each_pipe_masked(dev_priv, pipe, results->dirty_pipes) - skl_copy_wm_for_pipe(hw_vals, results, pipe); + if (crtc->state->active_changed) { + int plane; + + for (plane = 0; plane < intel_num_planes(intel_crtc); plane++) + skl_write_plane_wm(intel_crtc, results, plane); + + skl_write_cursor_wm(intel_crtc, results); + } + + skl_copy_wm_for_pipe(hw_vals, results, pipe); mutex_unlock(&dev_priv->wm.wm_mutex); } |