From da6911f330d40cfe115a37249e47643eff555e82 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Niklas=20S=C3=B6derlund?= <niklas.soderlund+renesas@ragnatech.se>
Date: Fri, 26 Nov 2021 00:02:57 +0100
Subject: [PATCH] media: rcar-vin: Update format alignment constraints
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Git-commit: da6911f330d40cfe115a37249e47643eff555e82
Patch-mainline: v5.17-rc1
References: git-fixes

This change fixes two issues with the size constraints for buffers.

- There is no width alignment constraint for RGB formats. Prior to this
  change they were treated as YUV and as a result were more restricted
  than needed. Add a new check to differentiate between the two.

- The minimum width and height supported is 5x2, not 2x4, this is an
  artifact from the driver's soc-camera days. Fix this incorrect
  assumption.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/media/platform/rcar-vin/rcar-v4l2.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/drivers/media/platform/rcar-vin/rcar-v4l2.c b/drivers/media/platform/rcar-vin/rcar-v4l2.c
index a5bfa76fdac6..2e60b9fce03b 100644
--- a/drivers/media/platform/rcar-vin/rcar-v4l2.c
+++ b/drivers/media/platform/rcar-vin/rcar-v4l2.c
@@ -179,20 +179,27 @@ static void rvin_format_align(struct rvin_dev *vin, struct v4l2_pix_format *pix)
 		break;
 	}
 
-	/* HW limit width to a multiple of 32 (2^5) for NV12/16 else 2 (2^1) */
+	/* Hardware limits width alignment based on format. */
 	switch (pix->pixelformat) {
+	/* Multiple of 32 (2^5) for NV12/16. */
 	case V4L2_PIX_FMT_NV12:
 	case V4L2_PIX_FMT_NV16:
 		walign = 5;
 		break;
-	default:
+	/* Multiple of 2 (2^1) for YUV. */
+	case V4L2_PIX_FMT_YUYV:
+	case V4L2_PIX_FMT_UYVY:
 		walign = 1;
 		break;
+	/* No multiple for RGB. */
+	default:
+		walign = 0;
+		break;
 	}
 
 	/* Limit to VIN capabilities */
-	v4l_bound_align_image(&pix->width, 2, vin->info->max_width, walign,
-			      &pix->height, 4, vin->info->max_height, 2, 0);
+	v4l_bound_align_image(&pix->width, 5, vin->info->max_width, walign,
+			      &pix->height, 2, vin->info->max_height, 0, 0);
 
 	pix->bytesperline = rvin_format_bytesperline(vin, pix);
 	pix->sizeimage = rvin_format_sizeimage(pix);
-- 
2.31.1