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drm/vc4: plane: Correct SAND30 word sizing for cropping on BCM2712

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BCM2712/vc6 uses 256bit words when reading in P030/SAND128,
increased from 128bit on BCM2711/vc5.

Update the code for cropping the read area to handle the correct
word length.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
This commit is contained in:
Dave Stevenson
2025-03-25 16:02:24 +00:00
committed by Dom Cobley
parent 19f19daa64
commit 2f544a1721
1 changed files with 8 additions and 8 deletions
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16
drivers/gpu/drm/vc4/vc4_plane.c
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@@ -1973,18 +1973,18 @@ static int vc6_plane_mode_set(struct drm_plane *plane,
if (fb->format->format == DRM_FORMAT_P030) {
/*
* Spec says: bits [31:4] of the given address
* should point to the 128-bit word containing
* the desired starting pixel, and bits[3:0]
* should be between 0 and 11, indicating which
* of the 12-pixels in that 128-bit word is the
* Spec says: bits [31:5] of the given address
* should point to the 256-bit word containing
* the desired starting pixel, and bits[4:0]
* should be between 0 and 23, indicating which
* of the 24-pixels in that 256-bit word is the
* first pixel to be used
*/
u32 remaining_pixels = src_x % 96;
u32 aligned = remaining_pixels / 12;
u32 last_bits = remaining_pixels % 12;
u32 aligned = remaining_pixels / 24;
u32 last_bits = remaining_pixels % 24;
x_off = aligned * 16 + last_bits;
x_off = aligned * 32 + last_bits;
pix_per_tile = 96;
} else {
pix_per_tile = tile_width / fb->format->cpp[0];