target/linux/bcm27xx/patches-5.4/950-0937-drm-vc4-Set-the-possible-crtcs-mask-correctly-for-pl.patch

   1 From 84a67330f3457469bc42f203111fc5ad800c506b Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.com>
   3 Date: Thu, 13 Aug 2020 18:29:56 +0100
   4 Subject: [PATCH] drm/vc4: Set the possible crtcs mask correctly for
   5  planes with FKMS
   6
   7 The driver was assigning all planes to crtcs when actually they're
   8 mapped to a specific crtc.
   9
  10 Correct the mask.
  11
  12 https://github.com/raspberrypi/linux/issues/3734
  13
  14 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
  15 ---
  16  drivers/gpu/drm/vc4/vc4_firmware_kms.c | 6 +++++-
  17  1 file changed, 5 insertions(+), 1 deletion(-)
  18
  19 --- a/drivers/gpu/drm/vc4/vc4_firmware_kms.c
  20 +++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c
  21 @@ -816,7 +816,7 @@ static struct drm_plane *vc4_fkms_plane_
  22                 formats[num_formats++] = vc_image_formats[i].drm;
  23
  24         plane = &vc4_plane->base;
  25 -       ret = drm_universal_plane_init(dev, plane, 0xff,
  26 +       ret = drm_universal_plane_init(dev, plane, 0,
  27                                        &vc4_plane_funcs,
  28                                        formats, num_formats, modifiers,
  29                                        type, NULL);
  30 @@ -1785,6 +1785,10 @@ static int vc4_fkms_create_screen(struct
  31                                   NULL);
  32         drm_crtc_helper_add(crtc, &vc4_crtc_helper_funcs);
  33
  34 +       /* Update the possible_crtcs mask for the overlay plane(s) */
  35 +       for (i = 1; i < (PLANES_PER_CRTC - 1); i++)
  36 +               planes[i]->possible_crtcs = drm_crtc_mask(crtc);
  37 +
  38         vc4_encoder = devm_kzalloc(dev, sizeof(*vc4_encoder), GFP_KERNEL);
  39         if (!vc4_encoder)
  40                 return -ENOMEM;