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[v3,1/3] media: imx: imx7-media-csi: Fix applying format constraints

Message ID 20230725200249.15447-2-laurent.pinchart@ideasonboard.com
State New
Headers show
Series [v3,1/3] media: imx: imx7-media-csi: Fix applying format constraints | expand

Commit Message

Laurent Pinchart July 25, 2023, 8:02 p.m. UTC 
From: Fabio Estevam <festevam@denx.de>

v4l_bound_align_image() aligns to a multiple of 2 to the power of
walign, not to walign. Depending on the pixel format, this causes the
image width to be aligned to 16 or 256 pixels instead of 4 or 8 as
required by the hardware. Fix it by rounding and clamping the width and
height manually.

Reported-by: Tim Harvey <tharvey@gateworks.com>
Closes: https://lore.kernel.org/linux-media/CAJ+vNU0BOVLTL17ofgHwtexbpuMYwH_aGUC==EXABUtHHiv_ag@mail.gmail.com
Fixes: 6f482c4729d9 ("media: imx: imx7-media-csi: Get rid of superfluous call to imx7_csi_mbus_fmt_to_pix_fmt")
Co-developed-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Signed-off-by: Fabio Estevam <festevam@denx.de>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
Changes since v2:

- Don't export clamp_roundup() from v4l2-common.c
- Simply clamp the height as no alignment is needed
- Add required includes
---
 drivers/media/platform/nxp/imx7-media-csi.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)
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Patch

diff --git a/drivers/media/platform/nxp/imx7-media-csi.c b/drivers/media/platform/nxp/imx7-media-csi.c
index 2ec1f3cd56a0..5684ecd2e3fe 100644
--- a/drivers/media/platform/nxp/imx7-media-csi.c
+++ b/drivers/media/platform/nxp/imx7-media-csi.c
@@ -9,7 +9,9 @@ 
 #include <linux/clk.h>
 #include <linux/delay.h>
 #include <linux/interrupt.h>
+#include <linux/math.h>
 #include <linux/mfd/syscon.h>
+#include <linux/minmax.h>
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_graph.h>
@@ -1137,8 +1139,9 @@  __imx7_csi_video_try_fmt(struct v4l2_pix_format *pixfmt,
 	 * TODO: Implement configurable stride support.
 	 */
 	walign = 8 * 8 / cc->bpp;
-	v4l_bound_align_image(&pixfmt->width, 1, 0xffff, walign,
-			      &pixfmt->height, 1, 0xffff, 1, 0);
+	pixfmt->width = clamp(round_up(pixfmt->width, walign), walign,
+			      round_down(65535U, walign));
+	pixfmt->height = clamp(pixfmt->height, 1U, 65535U);
 
 	pixfmt->bytesperline = pixfmt->width * cc->bpp / 8;
 	pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;