From 01a58d1bcb5539782599dd610222b566d660f457 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
@@ -1519,7 +1519,7 @@ 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);
 		}
@@ -1995,7 +1995,7 @@ 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);
 
