Hi Am 05.10.21 um 22:16 schrieb Igor Matheus Andrade Torrente:
This commit is the groundwork to introduce new formats to the planes and writeback buffer. As part of it, a new buffer metadata field is added to `vkms_writeback_job`, this metadata is represented by the `vkms_composer` struct. This will allow us, in the future, to have different compositing and wb format types. Signed-off-by: Igor Matheus Andrade Torrente <igormtorrente@xxxxxxxxx> --- drivers/gpu/drm/vkms/vkms_drv.h | 10 +++++----- drivers/gpu/drm/vkms/vkms_writeback.c | 16 +++++++++++++--- 2 files changed, 18 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/vkms/vkms_drv.h b/drivers/gpu/drm/vkms/vkms_drv.h index 64e62993b06f..d62f8ebd454b 100644 --- a/drivers/gpu/drm/vkms/vkms_drv.h +++ b/drivers/gpu/drm/vkms/vkms_drv.h @@ -20,11 +20,6 @@ #define XRES_MAX 8192 #define YRES_MAX 8192-struct vkms_writeback_job {- struct dma_buf_map map[DRM_FORMAT_MAX_PLANES]; - struct dma_buf_map data[DRM_FORMAT_MAX_PLANES]; -}; - struct vkms_composer { struct drm_framebuffer fb; struct drm_rect src, dst; @@ -34,6 +29,11 @@ struct vkms_composer { unsigned int cpp; };+struct vkms_writeback_job {+ struct dma_buf_map data[DRM_FORMAT_MAX_PLANES]; + struct vkms_composer composer; +}; + /** * vkms_plane_state - Driver specific plane state * @base: base plane state diff --git a/drivers/gpu/drm/vkms/vkms_writeback.c b/drivers/gpu/drm/vkms/vkms_writeback.c index 8694227f555f..5a3e12f105dc 100644 --- a/drivers/gpu/drm/vkms/vkms_writeback.c +++ b/drivers/gpu/drm/vkms/vkms_writeback.c @@ -75,7 +75,7 @@ static int vkms_wb_prepare_job(struct drm_writeback_connector *wb_connector, if (!vkmsjob) return -ENOMEM;- ret = drm_gem_fb_vmap(job->fb, vkmsjob->map, vkmsjob->data);+ ret = drm_gem_fb_vmap(job->fb, vkmsjob->composer.map, vkmsjob->data); if (ret) { DRM_ERROR("vmap failed: %d\n", ret); goto err_kfree; @@ -99,7 +99,7 @@ static void vkms_wb_cleanup_job(struct drm_writeback_connector *connector, if (!job->fb) return;- drm_gem_fb_vunmap(job->fb, vkmsjob->map);+ drm_gem_fb_vunmap(job->fb, vkmsjob->composer.map);vkmsdev = drm_device_to_vkms_device(job->fb->dev);vkms_set_composer(&vkmsdev->output, false); @@ -116,14 +116,24 @@ static void vkms_wb_atomic_commit(struct drm_connector *conn, struct drm_writeback_connector *wb_conn = &output->wb_connector; struct drm_connector_state *conn_state = wb_conn->base.state; struct vkms_crtc_state *crtc_state = output->composer_state; + struct drm_framebuffer *fb = connector_state->writeback_job->fb; + struct vkms_writeback_job *active_wb; + struct vkms_composer *wb_composer;if (!conn_state)return;vkms_set_composer(&vkmsdev->output, true); + active_wb = conn_state->writeback_job->priv;+ wb_composer = &active_wb->composer; + spin_lock_irq(&output->composer_lock); - crtc_state->active_writeback = conn_state->writeback_job->priv; + crtc_state->active_writeback = active_wb; + memcpy(&wb_composer->fb, fb, sizeof(struct drm_framebuffer)); + wb_composer->offset = fb->offsets[0]; + wb_composer->pitch = fb->pitches[0]; + wb_composer->cpp = fb->format->cpp[0];
I don't know the exact cleanup requirements of these structures, but copying fb into composer looks like it breaks reference counting of the framebuffer's gem objects at least.
This atomic_commit helper would better acquire the correct references and hand them over to the compositor thread. Why not have a ref-counted composer or get a reference on the framebuffer instead?
Best regards Thomas
crtc_state->wb_pending = true; spin_unlock_irq(&output->composer_lock); drm_writeback_queue_job(wb_conn, connector_state);
-- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Maxfeldstr. 5, 90409 Nürnberg, Germany (HRB 36809, AG Nürnberg) Geschäftsführer: Felix Imendörffer
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