[PATCH v2] media: rcar-vin: add GREY format

[Nikita Yushchenko <nikita.yoush@xxxxxxxxxxxxxxxxxx>]

From: Vladimir Barinov <vladimir.barinov@xxxxxxxxxxxxxxxxxx>

This adds support for MEDIA_BUS_FMT_Y8_1X8 input and V4L2_PIX_FMT_GREY
output format.

Signed-off-by: Vladimir Barinov <vladimir.barinov@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Nikita Yushchenko <nikita.yoush@xxxxxxxxxxxxxxxxxx>
---
Changes from v1:
- fix coding style issue

 drivers/media/platform/rcar-vin/rcar-dma.c  | 15 +++++++++++++++
 drivers/media/platform/rcar-vin/rcar-v4l2.c |  4 ++++
 2 files changed, 19 insertions(+)

diff --git a/drivers/media/platform/rcar-vin/rcar-dma.c b/drivers/media/platform/rcar-vin/rcar-dma.c
index f5f722ab1d4e..4d0d95cf4c5f 100644
--- a/drivers/media/platform/rcar-vin/rcar-dma.c
+++ b/drivers/media/platform/rcar-vin/rcar-dma.c
@@ -114,6 +114,7 @@
 /* Video n Data Mode Register bits */
 #define VNDMR_A8BIT(n)		(((n) & 0xff) << 24)
 #define VNDMR_A8BIT_MASK	(0xff << 24)
+#define VNDMR_YMODE_Y8		(1 << 12)
 #define VNDMR_EXRGB		(1 << 8)
 #define VNDMR_BPSM		(1 << 4)
 #define VNDMR_ABIT		(1 << 2)
@@ -603,6 +604,7 @@ void rvin_crop_scale_comp(struct rvin_dev *vin)
 	case V4L2_PIX_FMT_SGBRG8:
 	case V4L2_PIX_FMT_SGRBG8:
 	case V4L2_PIX_FMT_SRGGB8:
+	case V4L2_PIX_FMT_GREY:
 		stride /= 2;
 		break;
 	default:
@@ -695,6 +697,7 @@ static int rvin_setup(struct rvin_dev *vin)
 	case MEDIA_BUS_FMT_SGBRG8_1X8:
 	case MEDIA_BUS_FMT_SGRBG8_1X8:
 	case MEDIA_BUS_FMT_SRGGB8_1X8:
+	case MEDIA_BUS_FMT_Y8_1X8:
 		vnmc |= VNMC_INF_RAW8;
 		break;
 	default:
@@ -774,6 +777,14 @@ static int rvin_setup(struct rvin_dev *vin)
 	case V4L2_PIX_FMT_SRGGB8:
 		dmr = 0;
 		break;
+	case V4L2_PIX_FMT_GREY:
+		if (input_is_yuv) {
+			dmr = VNDMR_DTMD_YCSEP | VNDMR_YMODE_Y8;
+			output_is_yuv = true;
+		} else {
+			dmr = 0;
+		}
+		break;
 	default:
 		vin_err(vin, "Invalid pixelformat (0x%x)\n",
 			vin->format.pixelformat);
@@ -1145,6 +1156,10 @@ static int rvin_mc_validate_format(struct rvin_dev *vin, struct v4l2_subdev *sd,
 		if (vin->format.pixelformat != V4L2_PIX_FMT_SRGGB8)
 			return -EPIPE;
 		break;
+	case MEDIA_BUS_FMT_Y8_1X8:
+		if (vin->format.pixelformat != V4L2_PIX_FMT_GREY)
+			return -EPIPE;
+		break;
 	default:
 		return -EPIPE;
 	}
diff --git a/drivers/media/platform/rcar-vin/rcar-v4l2.c b/drivers/media/platform/rcar-vin/rcar-v4l2.c
index 0d141155f0e3..bdeff51bf768 100644
--- a/drivers/media/platform/rcar-vin/rcar-v4l2.c
+++ b/drivers/media/platform/rcar-vin/rcar-v4l2.c
@@ -82,6 +82,10 @@ static const struct rvin_video_format rvin_formats[] = {
 		.fourcc			= V4L2_PIX_FMT_SRGGB8,
 		.bpp			= 1,
 	},
+	{
+		.fourcc			= V4L2_PIX_FMT_GREY,
+		.bpp			= 1,
+	},
 };
 
 const struct rvin_video_format *rvin_format_from_pixel(struct rvin_dev *vin,
-- 
2.30.2