staging: vc04_services: isp: Set the YUV420/YVU420 format stride to 64 bytes

The bcm2835 ISP requires the base address of all input/output planes to have 32
byte alignment. Using a Y stride of 32 bytes would not guarantee that the V
plane would fulfil this, e.g. a height of 650 lines would mean the V plane
buffer is not 32 byte aligned for YUV420 formats.

Having a Y stride of 64 bytes would ensure both U and V planes have a 32 byte
alignment, as the luma height will always be an even number of lines.

Signed-off-by: Naushir Patuck <naush@raspberrypi.com>

diff --git a/drivers/staging/vc04_services/bcm2835-isp/bcm2835-isp-fmts.h b/drivers/staging/vc04_services/bcm2835-isp/bcm2835-isp-fmts.h
index 7541fb3..f6d6c88 100644 (file)
--- a/drivers/staging/vc04_services/bcm2835-isp/bcm2835-isp-fmts.h
+++ b/drivers/staging/vc04_services/bcm2835-isp/bcm2835-isp-fmts.h
@@ -48,7 +48,7 @@ static const struct bcm2835_isp_fmt supported_formats[] = {
                /* YUV formats */
                .fourcc             = V4L2_PIX_FMT_YUV420,
                .depth              = 8,
-               .bytesperline_align = 32,
+               .bytesperline_align = 64,
                .mmal_fmt           = MMAL_ENCODING_I420,
                .size_multiplier_x2 = 3,
                .colorspace_mask    = V4L2_COLORSPACE_MASK_YUV,
@@ -57,7 +57,7 @@ static const struct bcm2835_isp_fmt supported_formats[] = {
        }, {
                .fourcc             = V4L2_PIX_FMT_YVU420,
                .depth              = 8,
-               .bytesperline_align = 32,
+               .bytesperline_align = 64,
                .mmal_fmt           = MMAL_ENCODING_YV12,
                .size_multiplier_x2 = 3,
                .colorspace_mask    = V4L2_COLORSPACE_MASK_YUV,