media: rcar-vin: Report correct image stride

The image stride was adjusted when it was written to hardware and not
when configuring the format. Calculate the correct stride value and
report it to userspace.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/platform/rcar-vin/rcar-dma.c

@@ -577,6 +577,9 @@ static void rvin_crop_scale_comp_gen2(struct rvin_dev *vin)
 
 void rvin_crop_scale_comp(struct rvin_dev *vin)
 {
+	const struct rvin_video_format *fmt;
+	u32 stride;
+
 	/* Set Start/End Pixel/Line Pre-Clip */
 	rvin_write(vin, vin->crop.left, VNSPPRC_REG);
 	rvin_write(vin, vin->crop.left + vin->crop.width - 1, VNEPPRC_REG);
@@ -600,10 +603,9 @@ void rvin_crop_scale_comp(struct rvin_dev *vin)
 	if (vin->info->model != RCAR_GEN3)
 		rvin_crop_scale_comp_gen2(vin);
 
-	if (vin->format.pixelformat == V4L2_PIX_FMT_NV16)
-		rvin_write(vin, ALIGN(vin->format.width, 0x20), VNIS_REG);
-	else
-		rvin_write(vin, ALIGN(vin->format.width, 0x10), VNIS_REG);
+	fmt = rvin_format_from_pixel(vin, vin->format.pixelformat);
+	stride = vin->format.bytesperline / fmt->bpp;
+	rvin_write(vin, stride, VNIS_REG);
 }
 
 /* -----------------------------------------------------------------------------

drivers/media/platform/rcar-vin/rcar-v4l2.c

@@ -83,13 +83,16 @@ static u32 rvin_format_bytesperline(struct rvin_dev *vin,
 				    struct v4l2_pix_format *pix)
 {
 	const struct rvin_video_format *fmt;
+	u32 align;
 
 	fmt = rvin_format_from_pixel(vin, pix->pixelformat);
 
 	if (WARN_ON(!fmt))
 		return -EINVAL;
 
-	return pix->width * fmt->bpp;
+	align = pix->pixelformat == V4L2_PIX_FMT_NV16 ? 0x20 : 0x10;
+
+	return ALIGN(pix->width, align) * fmt->bpp;
 }
 
 static u32 rvin_format_sizeimage(struct v4l2_pix_format *pix)