diff options
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_pm.c | 55 |
1 files changed, 40 insertions, 15 deletions
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 0e4b8328a971..03654f5f68c3 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -3814,8 +3814,12 @@ skl_ddb_get_pipe_allocation_limits(struct drm_device *dev, struct intel_atomic_state *intel_state = to_intel_atomic_state(state); struct drm_i915_private *dev_priv = to_i915(dev); struct drm_crtc *for_crtc = cstate->base.crtc; - u16 pipe_size, ddb_size; - int nth_active_pipe; + const struct drm_crtc_state *crtc_state; + const struct drm_crtc *crtc; + u32 pipe_width = 0, total_width = 0, width_before_pipe = 0; + enum pipe for_pipe = to_intel_crtc(for_crtc)->pipe; + u16 ddb_size; + u32 i; if (WARN_ON(!state) || !cstate->base.active) { alloc->start = 0; @@ -3833,14 +3837,14 @@ skl_ddb_get_pipe_allocation_limits(struct drm_device *dev, *num_active, ddb); /* - * If the state doesn't change the active CRTC's, then there's - * no need to recalculate; the existing pipe allocation limits - * should remain unchanged. Note that we're safe from racing - * commits since any racing commit that changes the active CRTC - * list would need to grab _all_ crtc locks, including the one - * we currently hold. + * If the state doesn't change the active CRTC's or there is no + * modeset request, then there's no need to recalculate; + * the existing pipe allocation limits should remain unchanged. + * Note that we're safe from racing commits since any racing commit + * that changes the active CRTC list or do modeset would need to + * grab _all_ crtc locks, including the one we currently hold. */ - if (!intel_state->active_pipe_changes) { + if (!intel_state->active_pipe_changes && !intel_state->modeset) { /* * alloc may be cleared by clear_intel_crtc_state, * copy from old state to be sure @@ -3849,11 +3853,32 @@ skl_ddb_get_pipe_allocation_limits(struct drm_device *dev, return; } - nth_active_pipe = hweight32(intel_state->active_crtcs & - (drm_crtc_mask(for_crtc) - 1)); - pipe_size = ddb_size / hweight32(intel_state->active_crtcs); - alloc->start = nth_active_pipe * ddb_size / *num_active; - alloc->end = alloc->start + pipe_size; + /* + * Watermark/ddb requirement highly depends upon width of the + * framebuffer, So instead of allocating DDB equally among pipes + * distribute DDB based on resolution/width of the display. + */ + for_each_new_crtc_in_state(state, crtc, crtc_state, i) { + const struct drm_display_mode *adjusted_mode; + int hdisplay, vdisplay; + enum pipe pipe; + + if (!crtc_state->enable) + continue; + + pipe = to_intel_crtc(crtc)->pipe; + adjusted_mode = &crtc_state->adjusted_mode; + drm_mode_get_hv_timing(adjusted_mode, &hdisplay, &vdisplay); + total_width += hdisplay; + + if (pipe < for_pipe) + width_before_pipe += hdisplay; + else if (pipe == for_pipe) + pipe_width = hdisplay; + } + + alloc->start = ddb_size * width_before_pipe / total_width; + alloc->end = ddb_size * (width_before_pipe + pipe_width) / total_width; } static unsigned int skl_cursor_allocation(int num_active) @@ -5254,7 +5279,7 @@ skl_ddb_add_affected_pipes(struct drm_atomic_state *state, bool *changed) * any other display updates race with this transaction, so we need * to grab the lock on *all* CRTC's. */ - if (intel_state->active_pipe_changes) { + if (intel_state->active_pipe_changes || intel_state->modeset) { realloc_pipes = ~0; intel_state->wm_results.dirty_pipes = ~0; } |