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drm: vc4: plane: Avoid using pitch in calculating UBM for SAND

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The SAND modifier with height 0 is now using the provided pitch as
the column stride, but the UBM allocation needs to be done based
on the plane width.
Recompute the width in these conditions.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
This commit is contained in:
Dave Stevenson
2025-02-27 17:53:10 +00:00
committed by Dom Cobley
parent b52820d2e7
commit 69bc83d33e
1 changed files with 7 additions and 0 deletions
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7
drivers/gpu/drm/vc4/vc4_plane.c
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@@ -846,7 +846,14 @@ static size_t vc6_upm_size(const struct drm_plane_state *state,
{
const struct vc4_plane_state *vc4_state = to_vc4_plane_state(state);
unsigned int stride = state->fb->pitches[plane];
u64 base_format_mod = fourcc_mod_broadcom_mod(state->fb->modifier);
if (base_format_mod == DRM_FORMAT_MOD_BROADCOM_SAND128) {
if (state->fb->format->format == DRM_FORMAT_P030)
stride = (ALIGN(state->fb->width, 96) * 4) / 3;
else
stride = ALIGN(state->fb->width, 128);
}
/*
* TODO: This only works for raster formats, and is sub-optimal
* for buffers with a stride aligned on 32 bytes.