Messages in this thread Patch in this message | | | Date | Thu, 17 Nov 2022 12:31:01 -0500 | Subject | Re: [PATCH] drm/amd/display: add FB_DAMAGE_CLIPS support | From | Leo Li <> |
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On 11/15/22 15:24, Hamza Mahfooz wrote: > Currently, userspace doesn't have a way to communicate selective updates > to displays. So, enable support for FB_DAMAGE_CLIPS for DCN ASICs newer > than DCN301, convert DRM damage clips to dc dirty rectangles and fill > them into dirty_rects in fill_dc_dirty_rects(). > > Signed-off-by: Hamza Mahfooz <hamza.mahfooz@amd.com> > --- > .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 91 +++++++++++-------- > .../amd/display/amdgpu_dm/amdgpu_dm_plane.c | 4 + > 2 files changed, 58 insertions(+), 37 deletions(-) > > diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c > index 185d09c760ba..18b710ba802d 100644 > --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c > +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c > @@ -4842,6 +4842,31 @@ static int fill_dc_plane_attributes(struct amdgpu_device *adev, > return 0; > } > > +static inline void fill_dc_dirty_rect(struct drm_plane *plane, > + struct rect *dirty_rect, int32_t x, > + int32_t y, int32_t width, int32_t height, > + int *i, bool ffu) > +{ > + WARN_ON(*i >= DC_MAX_DIRTY_RECTS);
Hi Hamza,
Since dc_flip_addrs->dirty_rects has a fixed length of DC_MAX_DIRTY_RECTS per pipe (a restriction by DMUB FW), I think it makes more sense to fallback to a full-frame-update (FFU) if num_clips > DC_MAX_DIRTY_RECTS. An alternative would be to reject the atomic commit, but that sounds heavy handed.
> + > + dirty_rect->x = x; > + dirty_rect->y = y; > + dirty_rect->width = width; > + dirty_rect->height = height; > + > + if (ffu) > + drm_dbg(plane->dev, > + "[PLANE:%d] PSR FFU dirty rect size (%d, %d)\n", > + plane->base.id, width, height); > + else > + drm_dbg(plane->dev, > + "[PLANE:%d] PSR SU dirty rect at (%d, %d) size (%d, %d)", > + plane->base.id, x, y, width, height); > + > + (*i)++; > +} > + > + > /** > * fill_dc_dirty_rects() - Fill DC dirty regions for PSR selective updates > * > @@ -4862,10 +4887,6 @@ static int fill_dc_plane_attributes(struct amdgpu_device *adev, > * addition, certain use cases - such as cursor and multi-plane overlay (MPO) - > * implicitly provide damage clips without any client support via the plane > * bounds. > - * > - * Today, amdgpu_dm only supports the MPO and cursor usecase. > - * > - * TODO: Also enable for FB_DAMAGE_CLIPS > */ > static void fill_dc_dirty_rects(struct drm_plane *plane, > struct drm_plane_state *old_plane_state, > @@ -4876,12 +4897,11 @@ static void fill_dc_dirty_rects(struct drm_plane *plane, > struct dm_crtc_state *dm_crtc_state = to_dm_crtc_state(crtc_state); > struct rect *dirty_rects = flip_addrs->dirty_rects; > uint32_t num_clips; > + struct drm_mode_rect *clips; > bool bb_changed; > bool fb_changed; > uint32_t i = 0; > > - flip_addrs->dirty_rect_count = 0; > - > /* > * Cursor plane has it's own dirty rect update interface. See > * dcn10_dmub_update_cursor_data and dmub_cmd_update_cursor_info_data > @@ -4894,15 +4914,11 @@ static void fill_dc_dirty_rects(struct drm_plane *plane, > * requested, and there is a plane update, do FFU. > */ > if (!dm_crtc_state->mpo_requested) { > - dirty_rects[0].x = 0; > - dirty_rects[0].y = 0; > - dirty_rects[0].width = dm_crtc_state->base.mode.crtc_hdisplay; > - dirty_rects[0].height = dm_crtc_state->base.mode.crtc_vdisplay; > - flip_addrs->dirty_rect_count = 1; > - DRM_DEBUG_DRIVER("[PLANE:%d] PSR FFU dirty rect size (%d, %d)\n", > - new_plane_state->plane->base.id, > - dm_crtc_state->base.mode.crtc_hdisplay, > - dm_crtc_state->base.mode.crtc_vdisplay); > + fill_dc_dirty_rect(new_plane_state->plane, &dirty_rects[0], 0, > + 0, dm_crtc_state->base.mode.crtc_hdisplay, > + dm_crtc_state->base.mode.crtc_vdisplay, &i, > + true); > + flip_addrs->dirty_rect_count = i; > return; > }
Previously, we always do FFU on plane updates if no MPO has been requested. Now, since we want to look at user-provided DRM damage clips, this bit needs a bit of a rework.
In short, if there are valid clips for this plane (drm_plane_get_damage_clips_count() > 0), they should be added to dc_dirty_rects. Otherwise, fallback to old FFU logic.
With MPO, the damage clips are more interesting, since the entire plane's bounding box can be moved. I wonder if that is reflected in DRM's damage clips. Do you know if a plane bb change will be reflected in drm_plane_get_damage_clips()?
Thanks, Leo > > @@ -4914,6 +4930,7 @@ static void fill_dc_dirty_rects(struct drm_plane *plane, > * rects. > */ > num_clips = drm_plane_get_damage_clips_count(new_plane_state); > + clips = drm_plane_get_damage_clips(new_plane_state); > fb_changed = old_plane_state->fb->base.id != > new_plane_state->fb->base.id; > bb_changed = (old_plane_state->crtc_x != new_plane_state->crtc_x || > @@ -4921,33 +4938,33 @@ static void fill_dc_dirty_rects(struct drm_plane *plane, > old_plane_state->crtc_w != new_plane_state->crtc_w || > old_plane_state->crtc_h != new_plane_state->crtc_h); > > - DRM_DEBUG_DRIVER("[PLANE:%d] PSR bb_changed:%d fb_changed:%d num_clips:%d\n", > - new_plane_state->plane->base.id, > - bb_changed, fb_changed, num_clips); > + drm_dbg(plane->dev, > + "[PLANE:%d] PSR bb_changed:%d fb_changed:%d num_clips:%d\n", > + new_plane_state->plane->base.id, > + bb_changed, fb_changed, num_clips); > > - if (num_clips || fb_changed || bb_changed) { > - dirty_rects[i].x = new_plane_state->crtc_x; > - dirty_rects[i].y = new_plane_state->crtc_y; > - dirty_rects[i].width = new_plane_state->crtc_w; > - dirty_rects[i].height = new_plane_state->crtc_h; > - DRM_DEBUG_DRIVER("[PLANE:%d] PSR SU dirty rect at (%d, %d) size (%d, %d)\n", > - new_plane_state->plane->base.id, > - dirty_rects[i].x, dirty_rects[i].y, > - dirty_rects[i].width, dirty_rects[i].height); > - i += 1; > + if (num_clips) { > + for (; i < num_clips; i++, clips++) { > + fill_dc_dirty_rect(new_plane_state->plane, > + &dirty_rects[i], clips->x1, > + clips->y1, clips->x2 - clips->x1, > + clips->y2 - clips->y1, &i, false); > + } > + } else if (fb_changed || bb_changed) { > + fill_dc_dirty_rect(new_plane_state->plane, &dirty_rects[i], > + new_plane_state->crtc_x, > + new_plane_state->crtc_y, > + new_plane_state->crtc_w, > + new_plane_state->crtc_h, &i, false); > } > > /* Add old plane bounding-box if plane is moved or resized */ > if (bb_changed) { > - dirty_rects[i].x = old_plane_state->crtc_x; > - dirty_rects[i].y = old_plane_state->crtc_y; > - dirty_rects[i].width = old_plane_state->crtc_w; > - dirty_rects[i].height = old_plane_state->crtc_h; > - DRM_DEBUG_DRIVER("[PLANE:%d] PSR SU dirty rect at (%d, %d) size (%d, %d)\n", > - old_plane_state->plane->base.id, > - dirty_rects[i].x, dirty_rects[i].y, > - dirty_rects[i].width, dirty_rects[i].height); > - i += 1; > + fill_dc_dirty_rect(new_plane_state->plane, &dirty_rects[i], > + old_plane_state->crtc_x, > + old_plane_state->crtc_y, > + old_plane_state->crtc_w, > + old_plane_state->crtc_h, &i, false); > } > > flip_addrs->dirty_rect_count = i; > diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c > index e6854f7270a6..3c50b3ff7954 100644 > --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c > +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c > @@ -1600,6 +1600,10 @@ int amdgpu_dm_plane_init(struct amdgpu_display_manager *dm, > drm_plane_create_rotation_property(plane, DRM_MODE_ROTATE_0, > supported_rotations); > > + if (dm->adev->ip_versions[DCE_HWIP][0] > IP_VERSION(3, 0, 1) && > + plane->type != DRM_PLANE_TYPE_CURSOR) > + drm_plane_enable_fb_damage_clips(plane); > + > drm_plane_helper_add(plane, &dm_plane_helper_funcs); > > #ifdef CONFIG_DRM_AMD_DC_HDR
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