target/linux/bcm27xx/patches-5.10/950-0522-vc4-drm-SQUASH-Fix-source-offsets-with-DRM_FORMAT_P0.patch

   1 From 38643fd0a26ba42938a361db296e28f3b4975d8c Mon Sep 17 00:00:00 2001
   2 From: Dom Cobley <popcornmix@gmail.com>
   3 Date: Wed, 31 Mar 2021 18:12:55 +0100
   4 Subject: [PATCH] vc4/drm: SQUASH: Fix source offsets with
   5  DRM_FORMAT_P030
   6
   7 x_off should only be within current stripe
   8 The stripe number is accounted for elsewhere
   9
  10 Fixes: 9b1b1beb1c7e58b ("vc4/drm: Fix source offsets with DRM_FORMAT_P030")
  11
  12 Signed-off-by: Dom Cobley <popcornmix@gmail.com>
  13 ---
  14  drivers/gpu/drm/vc4/vc4_plane.c | 5 +++--
  15  1 file changed, 3 insertions(+), 2 deletions(-)
  16
  17 --- a/drivers/gpu/drm/vc4/vc4_plane.c
  18 +++ b/drivers/gpu/drm/vc4/vc4_plane.c
  19 @@ -825,8 +825,9 @@ static int vc4_plane_mode_set(struct drm
  20                          * and bits[3:0] should be between 0 and 11, indicating which
  21                          * of the 12-pixels in that 128-bit word is the first pixel to be used
  22                          */
  23 -                       u32 aligned = vc4_state->src_x / 12;
  24 -                       u32 last_bits = vc4_state->src_x % 12;
  25 +                       u32 remaining_pixels = vc4_state->src_x % 96;
  26 +                       u32 aligned = remaining_pixels / 12;
  27 +                       u32 last_bits = remaining_pixels % 12;
  28
  29                         x_off = aligned * 16 + last_bits;
  30                         hvs_format = HVS_PIXEL_FORMAT_YCBCR_10BIT;