target/linux/at91/patches-5.10/159-media-atmel-atmel-isc-add-checks-for-limiting-frame-.patch

   1 From de8fa25cdf3726c83ac0d7b3b1e28bcb6334aadd Mon Sep 17 00:00:00 2001
   2 From: Eugen Hristev <eugen.hristev@microchip.com>
   3 Date: Tue, 13 Apr 2021 12:57:01 +0200
   4 Subject: [PATCH 159/247] media: atmel: atmel-isc: add checks for limiting
   5  frame sizes
   6
   7 When calling the subdev, certain subdev drivers will overwrite the
   8 frame size and adding sizes which are beyond the ISC's capabilities.
   9 Thus we need to ensure the frame size is cropped to the maximum caps.
  10
  11 Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
  12 Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
  13 Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
  14 ---
  15  drivers/media/platform/atmel/atmel-isc-base.c | 12 ++++++++++++
  16  1 file changed, 12 insertions(+)
  17
  18 --- a/drivers/media/platform/atmel/atmel-isc-base.c
  19 +++ b/drivers/media/platform/atmel/atmel-isc-base.c
  20 @@ -1338,6 +1338,12 @@ static int isc_try_fmt(struct isc_device
  21
  22         v4l2_fill_pix_format(pixfmt, &format.format);
  23
  24 +       /* Limit to Atmel ISC hardware capabilities */
  25 +       if (pixfmt->width > ISC_MAX_SUPPORT_WIDTH)
  26 +               pixfmt->width = ISC_MAX_SUPPORT_WIDTH;
  27 +       if (pixfmt->height > ISC_MAX_SUPPORT_HEIGHT)
  28 +               pixfmt->height = ISC_MAX_SUPPORT_HEIGHT;
  29 +
  30         pixfmt->field = V4L2_FIELD_NONE;
  31         pixfmt->bytesperline = (pixfmt->width * isc->try_config.bpp) >> 3;
  32         pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
  33 @@ -1373,6 +1379,12 @@ static int isc_set_fmt(struct isc_device
  34         if (ret < 0)
  35                 return ret;
  36
  37 +       /* Limit to Atmel ISC hardware capabilities */
  38 +       if (pixfmt->width > ISC_MAX_SUPPORT_WIDTH)
  39 +               pixfmt->width = ISC_MAX_SUPPORT_WIDTH;
  40 +       if (pixfmt->height > ISC_MAX_SUPPORT_HEIGHT)
  41 +               pixfmt->height = ISC_MAX_SUPPORT_HEIGHT;
  42 +
  43         isc->fmt = *f;
  44
  45         if (isc->try_config.sd_format && isc->config.sd_format &&