git.openwrt.org Git - openwrt/staging/linusw.git/blob

   1 From a3fe2fa1ae15108705c5b56f4191414d6dc56188 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 0596/1085] drm/vc4: UV planes vertical scaling must always be
   5  enabled
   6
   7 It has been observed that a YUV422 unity scaled plane isn't displayed.
   8 Enabling vertical scaling on the UV planes solves this. There is
   9 already a similar clause to always enable horizontal scaling on the
  10 UV planes.
  11
  12 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
  13 ---
  14  drivers/gpu/drm/vc4/vc4_plane.c | 6 ++++++
  15  1 file changed, 6 insertions(+)
  16
  17 --- a/drivers/gpu/drm/vc4/vc4_plane.c
  18 +++ b/drivers/gpu/drm/vc4/vc4_plane.c
  19 @@ -522,6 +522,12 @@ static int vc4_plane_setup_clipping_and_
  20                  */
  21                 if (vc4_state->x_scaling[1] == VC4_SCALING_NONE)
  22                         vc4_state->x_scaling[1] = VC4_SCALING_PPF;
  23 +
  24 +               /* Similarly UV needs vertical scaling to be enabled.
  25 +                * Without this a 1:1 scaled YUV422 plane isn't rendered.
  26 +                */
  27 +               if (vc4_state->y_scaling[1] == VC4_SCALING_NONE)
  28 +                       vc4_state->y_scaling[1] = VC4_SCALING_PPF;
  29         } else {
  30                 vc4_state->is_yuv = false;
  31                 vc4_state->x_scaling[1] = VC4_SCALING_NONE;