[PATCH v3 3/4] media: imx: imx7-media-csi: Lift width constraints for 8bpp formats

Alexander Stein
2023-04-18T12:21:46Z

For 8-bit formats the image_width just needs to be a multiple of 8 pixels
others just a multiple of 4 pixels.

Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
---
Changes in v3:
* Fix commit message (Only 8-bit formats needs multiple of 8 pixels)

drivers/media/platform/nxp/imx7-media-csi.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/nxp/imx7-media-csi.c b/drivers/media/platform/nxp/imx7-media-csi.c
index 1315f5743b76f..730c9c57bf4bc 100644
--- a/drivers/media/platform/nxp/imx7-media-csi.c
+++ b/drivers/media/platform/nxp/imx7-media-csi.c
@@ -1146,6 +1146,7 @@ __imx7_csi_video_try_fmt(struct v4l2_pix_format *pixfmt,
struct v4l2_rect *compose)
{
const struct imx7_csi_pixfmt *cc;
+ u32 walign;

if (compose) {
compose->width = pixfmt->width;
@@ -1162,13 +1163,19 @@ __imx7_csi_video_try_fmt(struct v4l2_pix_format *pixfmt,
cc = imx7_csi_find_pixel_format(pixfmt->pixelformat);
}

+ /* Refer to CSI_IMAG_PARA.IMAGE_WIDTH description */
+ if (cc->bpp == 8)
+ walign = 8;
+ else
+ walign = 4;
+
/*
* Round up width for minimum burst size.
*
* TODO: Implement configurable stride support, and check what the real
* hardware alignment constraint on the width is.
*/
- v4l_bound_align_image(&pixfmt->width, 1, 0xffff, 8,
+ v4l_bound_align_image(&pixfmt->width, 1, 0xffff, walign,
&pixfmt->height, 1, 0xffff, 1, 0);

pixfmt->bytesperline = pixfmt->width * cc->bpp / 8;