target/linux/bcm27xx/patches-5.10/950-0696-ydrm-vc4-fkms-Fix-margin-calculations-for-the-right-.patch

   1 From e0aaa1acd1f33cc60e2b5c43cf6aac63bf3bbbc9 Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.com>
   3 Date: Mon, 12 Jul 2021 13:06:07 +0100
   4 Subject: [PATCH] ydrm/vc4: fkms: Fix margin calculations for the
   5  right/bottom edges
   6
   7 The calculations clipped the right/bottom edge of the clipped
   8 range based on the left/top margins.
   9
  10 https://github.com/raspberrypi/linux/issues/4447
  11
  12 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
  13 ---
  14  drivers/gpu/drm/vc4/vc4_firmware_kms.c | 8 ++++----
  15  1 file changed, 4 insertions(+), 4 deletions(-)
  16
  17 --- a/drivers/gpu/drm/vc4/vc4_firmware_kms.c
  18 +++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c
  19 @@ -458,15 +458,15 @@ static int vc4_fkms_margins_adj(struct d
  20         plane->dst_x = DIV_ROUND_CLOSEST(plane->dst_x * adjhdisplay,
  21                                          (int)crtc_state->mode.hdisplay);
  22         plane->dst_x += left;
  23 -       if (plane->dst_x > (int)(crtc_state->mode.hdisplay - left))
  24 -               plane->dst_x = crtc_state->mode.hdisplay - left;
  25 +       if (plane->dst_x > (int)(crtc_state->mode.hdisplay - right))
  26 +               plane->dst_x = crtc_state->mode.hdisplay - right;
  27
  28         adjvdisplay = crtc_state->mode.vdisplay - (top + bottom);
  29         plane->dst_y = DIV_ROUND_CLOSEST(plane->dst_y * adjvdisplay,
  30                                          (int)crtc_state->mode.vdisplay);
  31         plane->dst_y += top;
  32 -       if (plane->dst_y > (int)(crtc_state->mode.vdisplay - top))
  33 -               plane->dst_y = crtc_state->mode.vdisplay - top;
  34 +       if (plane->dst_y > (int)(crtc_state->mode.vdisplay - bottom))
  35 +               plane->dst_y = crtc_state->mode.vdisplay - bottom;
  36
  37         plane->dst_w = DIV_ROUND_CLOSEST(plane->dst_w * adjhdisplay,
  38                                          crtc_state->mode.hdisplay);