target/linux/bcm27xx/patches-6.1/950-0929-drm-vc4-Treat-zero-sized-destination-as-full-screen.patch

   1 From 2c987545a88507acdd8a572a3bd23a4ca0124d14 Mon Sep 17 00:00:00 2001
   2 From: Dom Cobley <popcornmix@gmail.com>
   3 Date: Thu, 13 Apr 2023 17:41:11 +0100
   4 Subject: [PATCH] drm/vc4: Treat zero sized destination as full screen
   5
   6 Kodi video planes come through with all zeros for fullscreen
   7 Without this check, we WARN when writing width-1, height-1
   8 to destination dlist
   9
  10 Signed-off-by: Dom Cobley <popcornmix@gmail.com>
  11 ---
  12  drivers/gpu/drm/vc4/vc4_plane.c | 5 +++++
  13  1 file changed, 5 insertions(+)
  14
  15 --- a/drivers/gpu/drm/vc4/vc4_plane.c
  16 +++ b/drivers/gpu/drm/vc4/vc4_plane.c
  17 @@ -484,6 +484,11 @@ static int vc4_plane_setup_clipping_and_
  18         vc4_state->crtc_w = state->dst.x2 - state->dst.x1;
  19         vc4_state->crtc_h = state->dst.y2 - state->dst.y1;
  20
  21 +       if (!vc4_state->crtc_w)
  22 +               vc4_state->crtc_w = state->crtc->mode.hdisplay;
  23 +       if (!vc4_state->crtc_h)
  24 +               vc4_state->crtc_h = state->crtc->mode.vdisplay;
  25 +
  26         ret = vc4_plane_margins_adj(state);
  27         if (ret)
  28                 return ret;