target/linux/bcm27xx/patches-5.4/950-0749-media-bcm2835-unicam-Retain-packing-information-on-G.patch

   1 From de4d7e44c08c2768de4b638af09072c80f1c3fa1 Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.com>
   3 Date: Tue, 19 May 2020 11:46:47 +0100
   4 Subject: [PATCH] media: bcm2835-unicam: Retain packing information on
   5  G_FMT
   6
   7 The change to retrieve the pixel format always on g_fmt didn't
   8 check whether the native or unpacked version of the format
   9 had been requested, and always returned the packed one.
  10 Correct this so that the packing setting is retained whereever
  11 possible.
  12
  13 Fixes "9d59e89 media: bcm2835-unicam: Re-fetch mbus code from subdev
  14 on a g_fmt call"
  15
  16 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
  17 ---
  18  .../media/platform/bcm2835/bcm2835-unicam.c   | 19 +++++++++++++++++--
  19  1 file changed, 17 insertions(+), 2 deletions(-)
  20
  21 --- a/drivers/media/platform/bcm2835/bcm2835-unicam.c
  22 +++ b/drivers/media/platform/bcm2835/bcm2835-unicam.c
  23 @@ -974,8 +974,23 @@ static int unicam_g_fmt_vid_cap(struct f
  24         if (!fmt)
  25                 return -EINVAL;
  26
  27 -       node->fmt = fmt;
  28 -       node->v_fmt.fmt.pix.pixelformat = fmt->fourcc;
  29 +       if (node->fmt != fmt) {
  30 +               /*
  31 +                * The sensor format has changed so the pixelformat needs to
  32 +                * be updated. Try and retain the packed/unpacked choice if
  33 +                * at all possible.
  34 +                */
  35 +               if (node->fmt->repacked_fourcc ==
  36 +                                               node->v_fmt.fmt.pix.pixelformat)
  37 +                       /* Using the repacked format */
  38 +                       node->v_fmt.fmt.pix.pixelformat = fmt->repacked_fourcc;
  39 +               else
  40 +                       /* Using the native format */
  41 +                       node->v_fmt.fmt.pix.pixelformat = fmt->fourcc;
  42 +
  43 +               node->fmt = fmt;
  44 +       }
  45 +
  46         *f = node->v_fmt;
  47
  48         return 0;