target/linux/bcm27xx/patches-6.1/950-0949-drm-vc4-UV-planes-vertical-scaling-must-always-be-en.patch

   1 From 03e0e348df7b685439f2db61ec2d8c8da25d1217 Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.com>
   3 Date: Wed, 23 Aug 2023 17:48:23 +0100
   4 Subject: [PATCH] drm/vc4: UV planes vertical scaling must always be enabled
   5
   6 It has been observed that a YUV422 unity scaled plane isn't displayed.
   7 Enabling vertical scaling on the UV planes solves this. There is
   8 already a similar clause to always enable horizontal scaling on the
   9 UV planes.
  10
  11 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
  12 ---
  13  drivers/gpu/drm/vc4/vc4_plane.c | 6 ++++++
  14  1 file changed, 6 insertions(+)
  15
  16 --- a/drivers/gpu/drm/vc4/vc4_plane.c
  17 +++ b/drivers/gpu/drm/vc4/vc4_plane.c
  18 @@ -522,6 +522,12 @@ static int vc4_plane_setup_clipping_and_
  19                  */
  20                 if (vc4_state->x_scaling[1] == VC4_SCALING_NONE)
  21                         vc4_state->x_scaling[1] = VC4_SCALING_PPF;
  22 +
  23 +               /* Similarly UV needs vertical scaling to be enabled.
  24 +                * Without this a 1:1 scaled YUV422 plane isn't rendered.
  25 +                */
  26 +               if (vc4_state->y_scaling[1] == VC4_SCALING_NONE)
  27 +                       vc4_state->y_scaling[1] = VC4_SCALING_PPF;
  28         } else {
  29                 vc4_state->is_yuv = false;
  30                 vc4_state->x_scaling[1] = VC4_SCALING_NONE;