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

   1 From 992fc6d6d31391d2eeff80b8f7f1992fe5e40fe0 Mon Sep 17 00:00:00 2001
   2 From: Naushir Patuck <naush@raspberrypi.com>
   3 Date: Tue, 29 Jun 2021 12:50:58 +0100
   4 Subject: [PATCH] staging: vc04_services: isp: Set the YUV420/YVU420
   5  format stride to 64 bytes
   6
   7 The bcm2835 ISP requires the base address of all input/output planes to have 32
   8 byte alignment. Using a Y stride of 32 bytes would not guarantee that the V
   9 plane would fulfil this, e.g. a height of 650 lines would mean the V plane
  10 buffer is not 32 byte aligned for YUV420 formats.
  11
  12 Having a Y stride of 64 bytes would ensure both U and V planes have a 32 byte
  13 alignment, as the luma height will always be an even number of lines.
  14
  15 Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
  16 ---
  17  drivers/staging/vc04_services/bcm2835-isp/bcm2835-isp-fmts.h | 4 ++--
  18  1 file changed, 2 insertions(+), 2 deletions(-)
  19
  20 --- a/drivers/staging/vc04_services/bcm2835-isp/bcm2835-isp-fmts.h
  21 +++ b/drivers/staging/vc04_services/bcm2835-isp/bcm2835-isp-fmts.h
  22 @@ -48,7 +48,7 @@ static const struct bcm2835_isp_fmt supp
  23                 /* YUV formats */
  24                 .fourcc             = V4L2_PIX_FMT_YUV420,
  25                 .depth              = 8,
  26 -               .bytesperline_align = 32,
  27 +               .bytesperline_align = 64,
  28                 .mmal_fmt           = MMAL_ENCODING_I420,
  29                 .size_multiplier_x2 = 3,
  30                 .colorspace_mask    = V4L2_COLORSPACE_MASK_YUV,
  31 @@ -57,7 +57,7 @@ static const struct bcm2835_isp_fmt supp
  32         }, {
  33                 .fourcc             = V4L2_PIX_FMT_YVU420,
  34                 .depth              = 8,
  35 -               .bytesperline_align = 32,
  36 +               .bytesperline_align = 64,
  37                 .mmal_fmt           = MMAL_ENCODING_YV12,
  38                 .size_multiplier_x2 = 3,
  39                 .colorspace_mask    = V4L2_COLORSPACE_MASK_YUV,