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