diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.15/950-0433-vc4-drm-vc4_plane-Remove-subpixel-positioning-check.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.15/950-0433-vc4-drm-vc4_plane-Remove-subpixel-positioning-check.patch | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.15/950-0433-vc4-drm-vc4_plane-Remove-subpixel-positioning-check.patch b/target/linux/bcm27xx/patches-5.15/950-0433-vc4-drm-vc4_plane-Remove-subpixel-positioning-check.patch new file mode 100644 index 0000000000..0e9f37f8a9 --- /dev/null +++ b/target/linux/bcm27xx/patches-5.15/950-0433-vc4-drm-vc4_plane-Remove-subpixel-positioning-check.patch @@ -0,0 +1,62 @@ +From 4b3401ec801e12a8ce5b20fa0410c60dfc792660 Mon Sep 17 00:00:00 2001 +From: Dom Cobley <popcornmix@gmail.com> +Date: Mon, 15 Mar 2021 13:28:06 +0000 +Subject: [PATCH] vc4/drm: vc4_plane: Remove subpixel positioning check + +There is little harm in ignoring fractional coordinates +(they just get truncated). + +Without this: +modetest -M vc4 -F tiles,gradient -s 32:1920x1080-60 -P89@74:1920x1080*.1.1@XR24 + +is rejected. We have the same issue in Kodi when trying to +use zoom options on video. + +Note: even if all coordinates are fully integer. e.g. +src:[0,0,1920,1080] dest:[-10,-10,1940,1100] + +it will still get rejected as drm_atomic_helper_check_plane_state +uses drm_rect_clip_scaled which transforms this to fractional src coords + +Signed-off-by: Dom Cobley <popcornmix@gmail.com> +--- + drivers/gpu/drm/vc4/vc4_plane.c | 21 ++++++++------------- + 1 file changed, 8 insertions(+), 13 deletions(-) + +--- a/drivers/gpu/drm/vc4/vc4_plane.c ++++ b/drivers/gpu/drm/vc4/vc4_plane.c +@@ -339,7 +339,6 @@ static int vc4_plane_setup_clipping_and_ + struct vc4_plane_state *vc4_state = to_vc4_plane_state(state); + struct drm_framebuffer *fb = state->fb; + struct drm_gem_cma_object *bo = drm_fb_cma_get_gem_obj(fb, 0); +- u32 subpixel_src_mask = (1 << 16) - 1; + int num_planes = fb->format->num_planes; + struct drm_crtc_state *crtc_state; + u32 h_subsample = fb->format->hsub; +@@ -361,18 +360,14 @@ static int vc4_plane_setup_clipping_and_ + for (i = 0; i < num_planes; i++) + vc4_state->offsets[i] = bo->paddr + fb->offsets[i]; + +- /* We don't support subpixel source positioning for scaling. */ +- if ((state->src.x1 & subpixel_src_mask) || +- (state->src.x2 & subpixel_src_mask) || +- (state->src.y1 & subpixel_src_mask) || +- (state->src.y2 & subpixel_src_mask)) { +- return -EINVAL; +- } +- +- vc4_state->src_x = state->src.x1 >> 16; +- vc4_state->src_y = state->src.y1 >> 16; +- vc4_state->src_w[0] = (state->src.x2 - state->src.x1) >> 16; +- vc4_state->src_h[0] = (state->src.y2 - state->src.y1) >> 16; ++ /* We don't support subpixel source positioning for scaling, ++ * but fractional coordinates can be generated by clipping ++ * so just round for now ++ */ ++ vc4_state->src_x = DIV_ROUND_CLOSEST(state->src.x1, 1<<16); ++ vc4_state->src_y = DIV_ROUND_CLOSEST(state->src.y1, 1<<16); ++ vc4_state->src_w[0] = DIV_ROUND_CLOSEST(state->src.x2, 1<<16) - vc4_state->src_x; ++ vc4_state->src_h[0] = DIV_ROUND_CLOSEST(state->src.y2, 1<<16) - vc4_state->src_y; + + vc4_state->crtc_x = state->dst.x1; + vc4_state->crtc_y = state->dst.y1; |