linux-kernel - [PATCH 2/2] media: rcar-vin: Add support to read renesas-vin-ycbcr-8b-g property

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Message-Id: <1595602732-25582-3-git-send-email-prabhakar.mahadev-lad.rj@bp.renesas.com>
Date:   Fri, 24 Jul 2020 15:58:52 +0100
From:   Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
To:     Niklas <niklas.soderlund@...natech.se>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>, linux-media@...r.kernel.org,
        linux-renesas-soc@...r.kernel.org
Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Biju Das <biju.das.jz@...renesas.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Prabhakar <prabhakar.csengg@...il.com>,
        Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: [PATCH 2/2] media: rcar-vin: Add support to read renesas-vin-ycbcr-8b-g property

Add support to read "renesas-vin-ycbcr-8b-g" DT property and select
the data pins accordingly for YCbCr422-8bit input

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Reviewed-by: Biju Das <biju.das.jz@...renesas.com>
---
 drivers/media/platform/rcar-vin/rcar-core.c | 4 +++-
 drivers/media/platform/rcar-vin/rcar-dma.c  | 7 +++++++
 drivers/media/platform/rcar-vin/rcar-vin.h  | 2 ++
 3 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/rcar-vin/rcar-core.c b/drivers/media/platform/rcar-vin/rcar-core.c
index 7440c89..5273110 100644
--- a/drivers/media/platform/rcar-vin/rcar-core.c
+++ b/drivers/media/platform/rcar-vin/rcar-core.c
@@ -624,6 +624,9 @@ static int rvin_parallel_parse_v4l2(struct device *dev,
 	vin->parallel = rvpe;
 	vin->parallel->mbus_type = vep->bus_type;
 
+	vin->parallel->ycbcr_8b_g = fwnode_property_present(vep->base.local_fwnode,
+							    "renesas-vin-ycbcr-8b-g");
+
 	switch (vin->parallel->mbus_type) {
 	case V4L2_MBUS_PARALLEL:
 		vin_dbg(vin, "Found PARALLEL media bus\n");
@@ -659,7 +662,6 @@ static int rvin_parallel_init(struct rvin_dev *vin)
 
 	vin_dbg(vin, "Found parallel subdevice %pOF\n",
 		to_of_node(vin->parallel->asd.match.fwnode));
-
 	vin->notifier.ops = &rvin_parallel_notify_ops;
 	ret = v4l2_async_notifier_register(&vin->v4l2_dev, &vin->notifier);
 	if (ret < 0) {
diff --git a/drivers/media/platform/rcar-vin/rcar-dma.c b/drivers/media/platform/rcar-vin/rcar-dma.c
index 1a30cd0..5db4838 100644
--- a/drivers/media/platform/rcar-vin/rcar-dma.c
+++ b/drivers/media/platform/rcar-vin/rcar-dma.c
@@ -127,6 +127,8 @@
 #define VNDMR2_FTEV		(1 << 17)
 #define VNDMR2_VLV(n)		((n & 0xf) << 12)
 
+#define VNDMR2_YDS		BIT(22)
+
 /* Video n CSI2 Interface Mode Register (Gen3) */
 #define VNCSI_IFMD_DES1		(1 << 26)
 #define VNCSI_IFMD_DES0		(1 << 25)
@@ -698,6 +700,11 @@ static int rvin_setup(struct rvin_dev *vin)
 		/* Data Enable Polarity Select */
 		if (vin->parallel->mbus_flags & V4L2_MBUS_DATA_ENABLE_LOW)
 			dmr2 |= VNDMR2_CES;
+
+		if (vin->parallel->ycbcr_8b_g && vin->mbus_code == MEDIA_BUS_FMT_UYVY8_2X8)
+			dmr2 |= VNDMR2_YDS;
+		else
+			dmr2 &= ~VNDMR2_YDS;
 	}
 
 	/*
diff --git a/drivers/media/platform/rcar-vin/rcar-vin.h b/drivers/media/platform/rcar-vin/rcar-vin.h
index c19d077..62a4bf2 100644
--- a/drivers/media/platform/rcar-vin/rcar-vin.h
+++ b/drivers/media/platform/rcar-vin/rcar-vin.h
@@ -95,6 +95,7 @@ struct rvin_video_format {
  * @mbus_flags:	media bus configuration flags
  * @source_pad:	source pad of remote subdevice
  * @sink_pad:	sink pad of remote subdevice
+ * @ycbcr_8b_g:	select data pins for YCbCr422-8bit
  *
  */
 struct rvin_parallel_entity {
@@ -106,6 +107,7 @@ struct rvin_parallel_entity {
 
 	unsigned int source_pad;
 	unsigned int sink_pad;
+	bool ycbcr_8b_g;
 };
 
 /**
-- 
2.7.4