lede/target/linux/bcm27xx/patches-6.12/950-0907-drm-vc4-Correct-arithmetic-for-shifting-between-colu.patch
=?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= d81c03f05e bcm27xx: add 6.12 patches from RPi repo
These patches were generated from:
https://github.com/raspberrypi/linux/commits/rpi-6.12.y
With the following command:
git format-patch -N v6.12.27..HEAD
(HEAD -> 8d3206ee456a5ecdf9ddbfd8e5e231e4f0cd716e)

Exceptions:
- (def)configs patches
- github workflows patches
- applied & reverted patches
- readme patches
- wireless patches

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2025-06-20 17:01:06 +08:00

38 lines
1.2 KiB
Diff

From 350070e73c4db512248653736f9cf20eea68a2f5 Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.com>
Date: Wed, 19 Mar 2025 15:34:04 +0000
Subject: [PATCH] drm/vc4: Correct arithmetic for shifting between columns of
SAND images
Commit 69dbba71ac11 ("drm/vc4: Add algorithmic handling for SAND")
lost a multiplication by the tile width when doing the pointer arithmetic
for cropping off columns for vc6.
Correct that computation.
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
---
drivers/gpu/drm/vc4/vc4_plane.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/gpu/drm/vc4/vc4_plane.c
+++ b/drivers/gpu/drm/vc4/vc4_plane.c
@@ -1516,7 +1516,7 @@ static int vc4_plane_mode_set(struct drm
tile = src_x / pix_per_tile;
- offsets[i] += pitch[i] * tile;
+ offsets[i] += pitch[i] * tile * tile_width;
offsets[i] += src_y / (i ? v_subsample : 1) * tile_width;
offsets[i] += x_off & ~(i ? 1 : 0);
}
@@ -1992,7 +1992,7 @@ static int vc6_plane_mode_set(struct drm
tile = src_x / pix_per_tile;
- offsets[i] += pitch[i] * tile;
+ offsets[i] += pitch[i] * tile * tile_width;
offsets[i] += src_y / (i ? v_subsample : 1) * tile_width;
offsets[i] += x_off & ~(i ? 1 : 0);