diff mbox

[RFC,2/3] rcar_vin: add devicetree support

Message ID 1396214765-23689-2-git-send-email-ben.dooks@codethink.co.uk (mailing list archive)
State RFC
Headers show

Commit Message

Ben Dooks March 30, 2014, 9:26 p.m. UTC 
Add support for devicetree probe for the rcar-vin
driver.

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
---
 .../devicetree/bindings/media/rcar_vin.txt         | 79 ++++++++++++++++++++++
 drivers/media/platform/soc_camera/rcar_vin.c       | 67 ++++++++++++++++--
 2 files changed, 140 insertions(+), 6 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/media/rcar_vin.txt

Comments

Ben Dooks March 30, 2014, 9:34 p.m. UTC | #1 
On 30/03/14 22:26, Ben Dooks wrote:
> Add support for devicetree probe for the rcar-vin
> driver.

Sorry, this was an older branch and needed
a fix for the pdev->id field.
Sergei Shtylyov March 31, 2014, 11:27 a.m. UTC | #2 
Hello.

On 31-03-2014 1:26, Ben Dooks wrote:

> Add support for devicetree probe for the rcar-vin
> driver.

> Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
> ---
>   .../devicetree/bindings/media/rcar_vin.txt         | 79 ++++++++++++++++++++++
>   drivers/media/platform/soc_camera/rcar_vin.c       | 67 ++++++++++++++++--
>   2 files changed, 140 insertions(+), 6 deletions(-)
>   create mode 100644 Documentation/devicetree/bindings/media/rcar_vin.txt

> diff --git a/Documentation/devicetree/bindings/media/rcar_vin.txt b/Documentation/devicetree/bindings/media/rcar_vin.txt
> new file mode 100644
> index 0000000..105b8de
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/rcar_vin.txt
> @@ -0,0 +1,79 @@
> +Renesas RCar Video Input driver (rcar_vin)
> +------------------------------------------
> +
> +The rcar_vin device provides video input capabilities for the Renesas R-Car
> +family of devices. The current blocks are always slaves and suppot one input
> +channel which can be either RGB, YUYV or BT656.
> +
> + - compatible: Must be one of the following
> +   - "renesas,vin-r8a7791" for the R8A7791 device
> +   - "renesas,vin-r8a7790" for the R8A7790 device
> +   - "renesas,vin-r8a7779" for the R8A7779 device
> +   - "renesas,vin-r8a7778" for the R8A7778 device
> + - reg: the register base and size for the device registers

    Register base of the registers?

[...]
> +/* composite video input */
> +&vin1 {
> +        pinctrl-0 = <&vin1_pins>;
> +        pinctrl-names = "default";
> +
> +        status = "ok";
> +
> +        port {
> +                #address-cells = <1>;

    Where is this used? I don't see "reg" prop in the sub-node...

> +                #size-cells = <0>;
> +
> +                vin1ep0: endpoint {
> +                        remote-endpoint = <&adv7180_1>;
> +                        bus-width = <8>;
> +                };
> +        };
> +};
> +
> +
> +
> +[1] video-interfaces.txt common video media interface
> diff --git a/drivers/media/platform/soc_camera/rcar_vin.c b/drivers/media/platform/soc_camera/rcar_vin.c
> index 47516df..73c56c7 100644
> --- a/drivers/media/platform/soc_camera/rcar_vin.c
> +++ b/drivers/media/platform/soc_camera/rcar_vin.c
[...]
> @@ -1392,6 +1395,17 @@ static struct soc_camera_host_ops rcar_vin_host_ops = {
>   	.init_videobuf2	= rcar_vin_init_videobuf2,
>   };
>
> +#ifdef CONFIG_OF

    I don't think it's worth using this #ifdef -- the OF code is not under 
#ifdef anyway...

> +static struct of_device_id rcar_vin_of_table[] = {
> +	{ .compatible = "renesas,vin-r8a7791", .data = (void *)RCAR_GEN2 },
> +	{ .compatible = "renesas,vin-r8a7790", .data = (void *)RCAR_GEN2 },
> +	{ .compatible = "renesas,vin-r8a7779", .data = (void *)RCAR_H1 },
> +	{ .compatible = "renesas,vin-r8a7778", .data = (void *)RCAR_M1 },
> +	{ },
> +};
> +MODULE_DEVICE_TABLE(of, rcar_vin_of_table);
> +#endif
> +
>   static struct platform_device_id rcar_vin_id_table[] = {
>   	{ "r8a7791-vin",  RCAR_GEN2 },
>   	{ "r8a7790-vin",  RCAR_GEN2 },
> @@ -1404,15 +1418,50 @@ MODULE_DEVICE_TABLE(platform, rcar_vin_id_table);
>
>   static int rcar_vin_probe(struct platform_device *pdev)
>   {
> +	const struct of_device_id *match = NULL;
>   	struct rcar_vin_priv *priv;
>   	struct resource *mem;
>   	struct rcar_vin_platform_data *pdata;
> +	unsigned int pdata_flags;
>   	int irq, ret;
>
> -	pdata = pdev->dev.platform_data;
> -	if (!pdata || !pdata->flags) {
> -		dev_err(&pdev->dev, "platform data not set\n");
> -		return -EINVAL;
> +	if (pdev->dev.of_node) {
> +		struct v4l2_of_endpoint ep;
> +		struct device_node *np;
> +
> +		match = of_match_device(of_match_ptr(rcar_vin_of_table),
> +					&pdev->dev);
> +
> +		np = v4l2_of_get_next_endpoint(pdev->dev.of_node, NULL);
> +		if (!np) {
> +			dev_err(&pdev->dev, "could not find endpoint\n");
> +			return -EINVAL;
> +		}
> +
> +		ret = v4l2_of_parse_endpoint(np, &ep);
> +		if (ret) {
> +			dev_err(&pdev->dev, "could not parse endpoint\n");
> +			return ret;
> +		}
> +
> +		if (ep.bus_type == V4L2_MBUS_BT656)
> +			pdata_flags = RCAR_VIN_BT656;
> +		else {

    Need {} in all arms of this *if* statement.

[...]
> @@ -1447,8 +1496,13 @@ static int rcar_vin_probe(struct platform_device *pdev)
>   	priv->ici.drv_name = dev_name(&pdev->dev);
>   	priv->ici.ops = &rcar_vin_host_ops;
>
> -	priv->pdata_flags = pdata->flags;
> -	priv->chip = pdev->id_entry->driver_data;
> +	priv->pdata_flags = pdata_flags;
> +	if (!match)
> +		priv->chip = pdev->id_entry->driver_data;
> +	else
> +		priv->chip = (enum chip_id)match->data;
> +
> +

    Too many empty lines.

> @@ -1489,6 +1543,7 @@ static struct platform_driver rcar_vin_driver = {
>   	.driver		= {
>   		.name		= DRV_NAME,
>   		.owner		= THIS_MODULE,
> +		.of_match_table	= of_match_ptr(rcar_vin_of_table),

    Don't think we need of_match_ptr() as well as #ifdef CONFIG_OF.

[...]

WBR, Sergei

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diff mbox

Patch

diff --git a/Documentation/devicetree/bindings/media/rcar_vin.txt b/Documentation/devicetree/bindings/media/rcar_vin.txt
new file mode 100644
index 0000000..105b8de
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/rcar_vin.txt
@@ -0,0 +1,79 @@ 
+Renesas RCar Video Input driver (rcar_vin)
+------------------------------------------
+
+The rcar_vin device provides video input capabilities for the Renesas R-Car
+family of devices. The current blocks are always slaves and suppot one input
+channel which can be either RGB, YUYV or BT656.
+
+ - compatible: Must be one of the following
+   - "renesas,vin-r8a7791" for the R8A7791 device
+   - "renesas,vin-r8a7790" for the R8A7790 device
+   - "renesas,vin-r8a7779" for the R8A7779 device
+   - "renesas,vin-r8a7778" for the R8A7778 device
+ - reg: the register base and size for the device registers
+ - interrupts: the interrupt for the device
+ - clocks: Reference to the parent clock
+
+The per-board settings:
+ - port sub-node describing a single endpoint connected to the vin
+   as described in video-interfaces.txt[1]. Only the first one will
+   be considered as each vin interface has one input port.
+
+   These settings are used to work out video input format and widths
+   into the system.
+
+
+Device node example
+-------------------
+
+        vin0: vin@0xe6ef0000 {
+                compatible = "renesas,vin-r8a7790";
+                clocks = <&mstp8_clks R8A7790_CLK_VIN0>;
+                reg = <0 0xe6ef0000 0 0x1000>;
+                interrupts = <0 188 IRQ_TYPE_LEVEL_HIGH>;
+                status = "disabled";
+        };
+
+Board setup example (vin1 composite video input)
+------------------------------------------------
+
+&i2c2   {
+        status = "ok";
+        pinctrl-0 = <&i2c2_pins>;
+        pinctrl-names = "default";
+
+        adv7180: adv7180@0x20 {
+                compatible = "adi,adv7180";
+                reg = <0x20>;
+                remote = <&vin1>;
+
+                port {
+                        adv7180_1: endpoint {
+                                bus-width = <8>;
+                                remote-endpoint = <&vin1ep0>;
+                        };
+                };
+        };
+};
+
+/* composite video input */
+&vin1 {
+        pinctrl-0 = <&vin1_pins>;
+        pinctrl-names = "default";
+
+        status = "ok";
+
+        port {
+                #address-cells = <1>;
+                #size-cells = <0>;
+
+                vin1ep0: endpoint {
+                        remote-endpoint = <&adv7180_1>;
+                        bus-width = <8>;
+                };
+        };
+};
+
+
+
+[1] video-interfaces.txt common video media interface
diff --git a/drivers/media/platform/soc_camera/rcar_vin.c b/drivers/media/platform/soc_camera/rcar_vin.c
index 47516df..73c56c7 100644
--- a/drivers/media/platform/soc_camera/rcar_vin.c
+++ b/drivers/media/platform/soc_camera/rcar_vin.c
@@ -24,6 +24,8 @@ 
 #include <linux/pm_runtime.h>
 #include <linux/slab.h>
 #include <linux/videodev2.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
 
 #include <media/soc_camera.h>
 #include <media/soc_mediabus.h>
@@ -32,6 +34,7 @@ 
 #include <media/v4l2-device.h>
 #include <media/v4l2-mediabus.h>
 #include <media/v4l2-subdev.h>
+#include <media/v4l2-of.h>
 #include <media/videobuf2-dma-contig.h>
 
 #include "soc_scale_crop.h"
@@ -1392,6 +1395,17 @@  static struct soc_camera_host_ops rcar_vin_host_ops = {
 	.init_videobuf2	= rcar_vin_init_videobuf2,
 };
 
+#ifdef CONFIG_OF
+static struct of_device_id rcar_vin_of_table[] = {
+	{ .compatible = "renesas,vin-r8a7791", .data = (void *)RCAR_GEN2 },
+	{ .compatible = "renesas,vin-r8a7790", .data = (void *)RCAR_GEN2 },
+	{ .compatible = "renesas,vin-r8a7779", .data = (void *)RCAR_H1 },
+	{ .compatible = "renesas,vin-r8a7778", .data = (void *)RCAR_M1 },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, rcar_vin_of_table);
+#endif
+
 static struct platform_device_id rcar_vin_id_table[] = {
 	{ "r8a7791-vin",  RCAR_GEN2 },
 	{ "r8a7790-vin",  RCAR_GEN2 },
@@ -1404,15 +1418,50 @@  MODULE_DEVICE_TABLE(platform, rcar_vin_id_table);
 
 static int rcar_vin_probe(struct platform_device *pdev)
 {
+	const struct of_device_id *match = NULL;
 	struct rcar_vin_priv *priv;
 	struct resource *mem;
 	struct rcar_vin_platform_data *pdata;
+	unsigned int pdata_flags;
 	int irq, ret;
 
-	pdata = pdev->dev.platform_data;
-	if (!pdata || !pdata->flags) {
-		dev_err(&pdev->dev, "platform data not set\n");
-		return -EINVAL;
+	if (pdev->dev.of_node) {
+		struct v4l2_of_endpoint ep;
+		struct device_node *np;
+
+		match = of_match_device(of_match_ptr(rcar_vin_of_table),
+					&pdev->dev);
+
+		np = v4l2_of_get_next_endpoint(pdev->dev.of_node, NULL);
+		if (!np) {
+			dev_err(&pdev->dev, "could not find endpoint\n");
+			return -EINVAL;
+		}
+
+		ret = v4l2_of_parse_endpoint(np, &ep);
+		if (ret) {
+			dev_err(&pdev->dev, "could not parse endpoint\n");
+			return ret;
+		}
+
+		if (ep.bus_type == V4L2_MBUS_BT656)
+			pdata_flags = RCAR_VIN_BT656;
+		else {
+			pdata_flags = 0;
+			if (ep.bus.parallel.flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
+				pdata_flags |= RCAR_VIN_HSYNC_ACTIVE_LOW;
+			if (ep.bus.parallel.flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
+				pdata_flags |= RCAR_VIN_VSYNC_ACTIVE_LOW;
+		}
+
+		dev_dbg(&pdev->dev, "pdata_flags = %08x\n", pdata_flags);
+	} else {
+		pdata = pdev->dev.platform_data;
+		if (!pdata || !pdata->flags) {
+			dev_err(&pdev->dev, "platform data not set\n");
+			return -EINVAL;
+		}
+		pdata_flags = pdata->flags;
 	}
 
 	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -1447,8 +1496,13 @@  static int rcar_vin_probe(struct platform_device *pdev)
 	priv->ici.drv_name = dev_name(&pdev->dev);
 	priv->ici.ops = &rcar_vin_host_ops;
 
-	priv->pdata_flags = pdata->flags;
-	priv->chip = pdev->id_entry->driver_data;
+	priv->pdata_flags = pdata_flags;
+	if (!match)
+		priv->chip = pdev->id_entry->driver_data;
+	else
+		priv->chip = (enum chip_id)match->data;
+
+
 	spin_lock_init(&priv->lock);
 	INIT_LIST_HEAD(&priv->capture);
 
@@ -1489,6 +1543,7 @@  static struct platform_driver rcar_vin_driver = {
 	.driver		= {
 		.name		= DRV_NAME,
 		.owner		= THIS_MODULE,
+		.of_match_table	= of_match_ptr(rcar_vin_of_table),
 	},
 	.id_table	= rcar_vin_id_table,
 };