Enable the FB_DAMAGE_CLIPS property to reduce display-update overhead. Also fixes a warning in the kernel log. simple-framebuffer simple-framebuffer.0: [drm] drm_plane_enable_fb_damage_clips() not called Fix the computation of the blit rectangle. This wasn't an issue so far, as simpledrm always blitted the full framebuffer. The code now supports damage clipping and virtual screen sizes. v3: * fix drm_dev_enter() error path (Noralf) * remove unnecessary clipping from update function (Noralf) Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx> --- drivers/gpu/drm/tiny/simpledrm.c | 28 +++++++++++++++++++--------- 1 file changed, 19 insertions(+), 9 deletions(-) diff --git a/drivers/gpu/drm/tiny/simpledrm.c b/drivers/gpu/drm/tiny/simpledrm.c index 571f716ff427..7c7d0aca8e31 100644 --- a/drivers/gpu/drm/tiny/simpledrm.c +++ b/drivers/gpu/drm/tiny/simpledrm.c @@ -642,19 +642,23 @@ simpledrm_simple_display_pipe_enable(struct drm_simple_display_pipe *pipe, void *vmap = shadow_plane_state->data[0].vaddr; /* TODO: Use mapping abstraction */ struct drm_device *dev = &sdev->dev; void __iomem *dst = sdev->screen_base; - struct drm_rect clip; + struct drm_rect src_clip, dst_clip; int idx; if (!fb) return; - if (!drm_dev_enter(dev, &idx)) + drm_rect_fp_to_int(&src_clip, &plane_state->src); + + dst_clip = plane_state->dst; + if (!drm_rect_intersect(&dst_clip, &src_clip)) return; - drm_rect_init(&clip, 0, 0, fb->width, fb->height); + if (!drm_dev_enter(dev, &idx)) + return; - dst += drm_fb_clip_offset(sdev->pitch, sdev->format, &clip); - drm_fb_blit_toio(dst, sdev->pitch, sdev->format->format, vmap, fb, &clip); + dst += drm_fb_clip_offset(sdev->pitch, sdev->format, &dst_clip); + drm_fb_blit_toio(dst, sdev->pitch, sdev->format->format, vmap, fb, &src_clip); drm_dev_exit(idx); } @@ -686,20 +690,24 @@ simpledrm_simple_display_pipe_update(struct drm_simple_display_pipe *pipe, struct drm_framebuffer *fb = plane_state->fb; struct drm_device *dev = &sdev->dev; void __iomem *dst = sdev->screen_base; - struct drm_rect clip; + struct drm_rect src_clip, dst_clip; int idx; if (!fb) return; - if (!drm_atomic_helper_damage_merged(old_plane_state, plane_state, &clip)) + if (!drm_atomic_helper_damage_merged(old_plane_state, plane_state, &src_clip)) + return; + + dst_clip = plane_state->dst; + if (!drm_rect_intersect(&dst_clip, &src_clip)) return; if (!drm_dev_enter(dev, &idx)) return; - dst += drm_fb_clip_offset(sdev->pitch, sdev->format, &clip); - drm_fb_blit_toio(dst, sdev->pitch, sdev->format->format, vmap, fb, &clip); + dst += drm_fb_clip_offset(sdev->pitch, sdev->format, &dst_clip); + drm_fb_blit_toio(dst, sdev->pitch, sdev->format->format, vmap, fb, &src_clip); drm_dev_exit(idx); } @@ -794,6 +802,8 @@ static int simpledrm_device_init_modeset(struct simpledrm_device *sdev) if (ret) return ret; + drm_plane_enable_fb_damage_clips(&pipe->plane); + drm_mode_config_reset(dev); return 0; -- 2.33.1
