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

[Alexander Stein]

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 at 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;
-- 
2.34.1