[PATCH v2 0/4] [media] davinci: VPIF: add DT support

[PATCH v2 0/4] [media] davinci: VPIF: add DT support

[Kevin Hilman]

Add DT support, including getting subdevs from DT ports/endpoints.

Changes since v1:
- more specific compatible strings, based on SoC: ti,da850-vpif*
- fix locking bug when unlocking over subdev s_stream

Kevin Hilman (4):
  [media] davinci: add support for DT init
  [media] davinci: vpif_capture: don't lock over s_stream
  [media] davinci: vpif_capture: get subdevs from DT
  [media] dt-bindings: add TI VPIF documentation

 .../bindings/media/ti,da850-vpif-capture.txt       |  65 +++++++++
 .../devicetree/bindings/media/ti,da850-vpif.txt    |   8 ++
 drivers/media/platform/davinci/vpif.c              |   9 ++
 drivers/media/platform/davinci/vpif_capture.c      | 147 ++++++++++++++++++++-
 include/media/davinci/vpif_types.h                 |   9 +-
 5 files changed, 232 insertions(+), 6 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/media/ti,da850-vpif-capture.txt
 create mode 100644 Documentation/devicetree/bindings/media/ti,da850-vpif.txt

-- 
2.9.3

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[PATCH v2 2/4] [media] davinci: vpif_capture: don't lock over s_stream

[Kevin Hilman]

Video capture subdevs may be over I2C and may sleep during xfer, so we
cannot do IRQ-disabled locking when calling the subdev.

Signed-off-by: Kevin Hilman <khilman@baylibre.com>
---
 drivers/media/platform/davinci/vpif_capture.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/media/platform/davinci/vpif_capture.c b/drivers/media/platform/davinci/vpif_capture.c
index 87ee1e2c3864..94ee6cf03f02 100644
--- a/drivers/media/platform/davinci/vpif_capture.c
+++ b/drivers/media/platform/davinci/vpif_capture.c
@@ -193,7 +193,10 @@ static int vpif_start_streaming(struct vb2_queue *vq, unsigned int count)
 		}
 	}
 
+	spin_unlock_irqrestore(&common->irqlock, flags);
 	ret = v4l2_subdev_call(ch->sd, video, s_stream, 1);
+	spin_lock_irqsave(&common->irqlock, flags);
+
 	if (ret && ret != -ENOIOCTLCMD && ret != -ENODEV) {
 		vpif_dbg(1, debug, "stream on failed in subdev\n");
 		goto err;
-- 
2.9.3

[PATCH v2 3/4] [media] davinci: vpif_capture: get subdevs from DT

[Kevin Hilman]

Allow getting of subdevs from DT ports and endpoints.

The _get_pdata() function was larely inspired by (i.e. stolen from)
am437x-vpfe.c

Signed-off-by: Kevin Hilman <khilman@baylibre.com>
---
 drivers/media/platform/davinci/vpif_capture.c | 130 +++++++++++++++++++++++++-
 include/media/davinci/vpif_types.h            |   9 +-
 2 files changed, 133 insertions(+), 6 deletions(-)

diff --git a/drivers/media/platform/davinci/vpif_capture.c b/drivers/media/platform/davinci/vpif_capture.c
index 94ee6cf03f02..47a4699157e7 100644
--- a/drivers/media/platform/davinci/vpif_capture.c
+++ b/drivers/media/platform/davinci/vpif_capture.c
@@ -26,6 +26,8 @@
 #include <linux/slab.h>
 
 #include <media/v4l2-ioctl.h>
+#include <media/v4l2-of.h>
+#include <media/i2c/tvp514x.h>
 
 #include "vpif.h"
 #include "vpif_capture.h"
@@ -650,6 +652,10 @@ static int vpif_input_to_subdev(
 
 	vpif_dbg(2, debug, "vpif_input_to_subdev\n");
 
+	if (!chan_cfg)
+		return -1;
+	if (input_index >= chan_cfg->input_count)
+		return -1;
 	subdev_name = chan_cfg->inputs[input_index].subdev_name;
 	if (subdev_name == NULL)
 		return -1;
@@ -657,7 +663,7 @@ static int vpif_input_to_subdev(
 	/* loop through the sub device list to get the sub device info */
 	for (i = 0; i < vpif_cfg->subdev_count; i++) {
 		subdev_info = &vpif_cfg->subdev_info[i];
-		if (!strcmp(subdev_info->name, subdev_name))
+		if (subdev_info && !strcmp(subdev_info->name, subdev_name))
 			return i;
 	}
 	return -1;
@@ -1327,6 +1333,21 @@ static int vpif_async_bound(struct v4l2_async_notifier *notifier,
 {
 	int i;
 
+	for (i = 0; i < vpif_obj.config->asd_sizes[0]; i++) {
+		struct v4l2_async_subdev *_asd = vpif_obj.config->asd[i];
+		const struct device_node *node = _asd->match.of.node;
+
+		if (node == subdev->of_node) {
+			vpif_obj.sd[i] = subdev;
+			vpif_obj.config->chan_config->inputs[i].subdev_name =
+				(char *)subdev->of_node->full_name;
+			vpif_dbg(2, debug,
+				 "%s: setting input %d subdev_name = %s\n",
+				 __func__, i, subdev->of_node->full_name);
+			return 0;
+		}
+	}
+
 	for (i = 0; i < vpif_obj.config->subdev_count; i++)
 		if (!strcmp(vpif_obj.config->subdev_info[i].name,
 			    subdev->name)) {
@@ -1422,6 +1443,110 @@ static int vpif_async_complete(struct v4l2_async_notifier *notifier)
 	return vpif_probe_complete();
 }
 
+static struct vpif_capture_config *
+vpif_capture_get_pdata(struct platform_device *pdev)
+{
+	struct device_node *endpoint = NULL;
+	struct v4l2_of_endpoint bus_cfg;
+	struct vpif_capture_config *pdata;
+	struct vpif_subdev_info *sdinfo;
+	struct vpif_capture_chan_config *chan;
+	unsigned int i;
+
+	dev_dbg(&pdev->dev, "vpif_get_pdata\n");
+
+	if (!IS_ENABLED(CONFIG_OF) || !pdev->dev.of_node)
+		return pdev->dev.platform_data;
+
+	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
+	if (!pdata)
+		return NULL;
+	pdata->subdev_info =
+		devm_kzalloc(&pdev->dev, sizeof(*pdata->subdev_info) *
+			     VPIF_CAPTURE_MAX_CHANNELS, GFP_KERNEL);
+
+	if (!pdata->subdev_info)
+		return NULL;
+	dev_dbg(&pdev->dev, "%s\n", __func__);
+
+	for (i = 0; ; i++) {
+		struct device_node *rem;
+		unsigned int flags;
+		int err;
+
+		endpoint = of_graph_get_next_endpoint(pdev->dev.of_node,
+						      endpoint);
+		if (!endpoint)
+			break;
+
+		sdinfo = &pdata->subdev_info[i];
+		chan = &pdata->chan_config[i];
+		chan->inputs = devm_kzalloc(&pdev->dev,
+					    sizeof(*chan->inputs) *
+					    VPIF_DISPLAY_MAX_CHANNELS,
+					    GFP_KERNEL);
+
+		chan->input_count++;
+		chan->inputs[i].input.type = V4L2_INPUT_TYPE_CAMERA;
+		chan->inputs[i].input.std = V4L2_STD_ALL;
+		chan->inputs[i].input.capabilities = V4L2_IN_CAP_STD;
+
+		/* FIXME: need a new property? ch0:composite ch1: s-video */
+		if (i == 0)
+			chan->inputs[i].input_route = INPUT_CVBS_VI2B;
+		else
+			chan->inputs[i].input_route = INPUT_SVIDEO_VI2C_VI1C;
+		chan->inputs[i].output_route = OUTPUT_10BIT_422_EMBEDDED_SYNC;
+
+		err = v4l2_of_parse_endpoint(endpoint, &bus_cfg);
+		if (err) {
+			dev_err(&pdev->dev, "Could not parse the endpoint\n");
+			goto done;
+		}
+		dev_dbg(&pdev->dev, "Endpoint %s, bus_width = %d\n",
+			endpoint->full_name, bus_cfg.bus.parallel.bus_width);
+		flags = bus_cfg.bus.parallel.flags;
+
+		if (flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH)
+			chan->vpif_if.hd_pol = 1;
+
+		if (flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH)
+			chan->vpif_if.vd_pol = 1;
+
+		chan->vpif_if.if_type = VPIF_IF_BT656;
+		rem = of_graph_get_remote_port_parent(endpoint);
+		if (!rem) {
+			dev_dbg(&pdev->dev, "Remote device at %s not found\n",
+				endpoint->full_name);
+			goto done;
+		}
+
+		dev_dbg(&pdev->dev, "Remote device %s, %s found\n",
+			rem->name, rem->full_name);
+		sdinfo->name = rem->full_name;
+
+		pdata->asd[i] = devm_kzalloc(&pdev->dev,
+					     sizeof(struct v4l2_async_subdev),
+					     GFP_KERNEL);
+		if (!pdata->asd[i]) {
+			of_node_put(rem);
+			pdata = NULL;
+			goto done;
+		}
+
+		pdata->asd[i]->match_type = V4L2_ASYNC_MATCH_OF;
+		pdata->asd[i]->match.of.node = rem;
+		of_node_put(rem);
+	}
+
+done:
+	pdata->asd_sizes[0] = i;
+	pdata->subdev_count = i;
+	pdata->card_name = "DA850/OMAP-L138 Video Capture";
+
+	return pdata;
+}
+
 /**
  * vpif_probe : This function probes the vpif capture driver
  * @pdev: platform device pointer
@@ -1438,6 +1563,7 @@ static __init int vpif_probe(struct platform_device *pdev)
 	int res_idx = 0;
 	int i, err;
 
+	pdev->dev.platform_data = vpif_capture_get_pdata(pdev);
 	if (!pdev->dev.platform_data) {
 		dev_warn(&pdev->dev, "Missing platform data.  Giving up.\n");
 		return -EINVAL;
@@ -1480,7 +1606,7 @@ static __init int vpif_probe(struct platform_device *pdev)
 		goto vpif_unregister;
 	}
 
-	if (!vpif_obj.config->asd_sizes) {
+	if (!vpif_obj.config->asd_sizes[0]) {
 		i2c_adap = i2c_get_adapter(1);
 		for (i = 0; i < subdev_count; i++) {
 			subdevdata = &vpif_obj.config->subdev_info[i];
diff --git a/include/media/davinci/vpif_types.h b/include/media/davinci/vpif_types.h
index 3cb1704a0650..4ee3b41975db 100644
--- a/include/media/davinci/vpif_types.h
+++ b/include/media/davinci/vpif_types.h
@@ -65,14 +65,14 @@ struct vpif_display_config {
 
 struct vpif_input {
 	struct v4l2_input input;
-	const char *subdev_name;
+	char *subdev_name;
 	u32 input_route;
 	u32 output_route;
 };
 
 struct vpif_capture_chan_config {
 	struct vpif_interface vpif_if;
-	const struct vpif_input *inputs;
+	struct vpif_input *inputs;
 	int input_count;
 };
 
@@ -83,7 +83,8 @@ struct vpif_capture_config {
 	struct vpif_subdev_info *subdev_info;
 	int subdev_count;
 	const char *card_name;
-	struct v4l2_async_subdev **asd;	/* Flat array, arranged in groups */
-	int *asd_sizes;		/* 0-terminated array of asd group sizes */
+
+	struct v4l2_async_subdev *asd[VPIF_CAPTURE_MAX_CHANNELS];
+	int asd_sizes[VPIF_CAPTURE_MAX_CHANNELS];
 };
 #endif /* _VPIF_TYPES_H */
-- 
2.9.3

[PATCH v2 1/4] [media] davinci: add support for DT init

[Kevin Hilman]

Add basic support for initialization via DT.

Signed-off-by: Kevin Hilman <khilman-rdvid1DuHRBWk0Htik3J/w@public.gmane.org>
---
 drivers/media/platform/davinci/vpif.c         |  9 +++++++++
 drivers/media/platform/davinci/vpif_capture.c | 14 ++++++++++++++
 2 files changed, 23 insertions(+)

diff --git a/drivers/media/platform/davinci/vpif.c b/drivers/media/platform/davinci/vpif.c
index 0380cf2e5775..d4434f614141 100644
--- a/drivers/media/platform/davinci/vpif.c
+++ b/drivers/media/platform/davinci/vpif.c
@@ -464,8 +464,17 @@ static const struct dev_pm_ops vpif_pm = {
 #define vpif_pm_ops NULL
 #endif
 
+#if IS_ENABLED(CONFIG_OF)
+static const struct of_device_id vpif_of_match[] = {
+	{ .compatible = "ti,da850-vpif", },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, vpif_of_match);
+#endif
+
 static struct platform_driver vpif_driver = {
 	.driver = {
+		.of_match_table = of_match_ptr(vpif_of_match),
 		.name	= "vpif",
 		.pm	= vpif_pm_ops,
 	},
diff --git a/drivers/media/platform/davinci/vpif_capture.c b/drivers/media/platform/davinci/vpif_capture.c
index 5104cc0ee40e..87ee1e2c3864 100644
--- a/drivers/media/platform/davinci/vpif_capture.c
+++ b/drivers/media/platform/davinci/vpif_capture.c
@@ -1435,6 +1435,11 @@ static __init int vpif_probe(struct platform_device *pdev)
 	int res_idx = 0;
 	int i, err;
 
+	if (!pdev->dev.platform_data) {
+		dev_warn(&pdev->dev, "Missing platform data.  Giving up.\n");
+		return -EINVAL;
+	}
+
 	vpif_dev = &pdev->dev;
 
 	err = initialize_vpif();
@@ -1618,8 +1623,17 @@ static int vpif_resume(struct device *dev)
 
 static SIMPLE_DEV_PM_OPS(vpif_pm_ops, vpif_suspend, vpif_resume);
 
+#if IS_ENABLED(CONFIG_OF)
+static const struct of_device_id vpif_capture_of_match[] = {
+	{ .compatible = "ti,da850-vpif-capture", },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, vpif_capture_of_match);
+#endif
+
 static __refdata struct platform_driver vpif_driver = {
 	.driver	= {
+		.of_match_table = of_match_ptr(vpif_capture_of_match),
 		.name	= VPIF_DRIVER_NAME,
 		.pm	= &vpif_pm_ops,
 	},
-- 
2.9.3

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[PATCH v2 4/4] [media] dt-bindings: add TI VPIF documentation

[Kevin Hilman]

Cc: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Signed-off-by: Kevin Hilman <khilman-rdvid1DuHRBWk0Htik3J/w@public.gmane.org>
---
 .../bindings/media/ti,da850-vpif-capture.txt       | 65 ++++++++++++++++++++++
 .../devicetree/bindings/media/ti,da850-vpif.txt    |  8 +++
 2 files changed, 73 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/media/ti,da850-vpif-capture.txt
 create mode 100644 Documentation/devicetree/bindings/media/ti,da850-vpif.txt

diff --git a/Documentation/devicetree/bindings/media/ti,da850-vpif-capture.txt b/Documentation/devicetree/bindings/media/ti,da850-vpif-capture.txt
new file mode 100644
index 000000000000..bdd93267301f
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/ti,da850-vpif-capture.txt
@@ -0,0 +1,65 @@
+Texas Instruments VPIF Capture
+------------------------------
+
+The TI Video Port InterFace (VPIF) capture component is the primary
+component for video capture on the DA850 family of TI DaVinci SoCs.
+
+TI Document number reference: SPRUH82C
+
+Required properties:
+- compatible: must be "ti,da850-vpif-capture"
+- reg: physical base address and length of the registers set for the device;
+- interrupts: should contain IRQ line for the VPIF
+
+VPIF capture has a 16-bit parallel bus input, supporting 2 8-bit
+channels or a single 16-bit channel.  It should contain at least one
+port child node with child 'endpoint' node. Please refer to the
+bindings defined in
+Documentation/devicetree/bindings/media/video-interfaces.txt.
+
+Example using 2 8-bit input channels, one of which is connected to an
+I2C-connected TVP5147 decoder:
+
+	vpif_capture: video-capture@0x00217000 {
+		compatible = "ti,vpif-capture";
+		reg = <0x00217000 0x1000>;
+		interrupts = <92>;
+
+		port {
+			vpif_ch0: endpoint@0 {
+				  reg = <0>;
+				  bus-width = <8>;
+				  remote-endpoint = <&composite>;
+			};
+
+			vpif_ch1: endpoint@1 {
+				  reg = <1>;
+				  bus-width = <8>;
+				  data-shift = <8>;
+			};
+		};
+	};
+
+[ ... ]
+
+&i2c0 {
+
+	tvp5147@5d {
+		compatible = "ti,tvp5147";
+		reg = <0x5d>;
+		status = "okay";
+
+		port {
+			composite: endpoint {
+				hsync-active = <1>;
+				vsync-active = <1>;
+				pclk-sample = <0>;
+
+				/* VPIF channel 0 (lower 8-bits) */
+				remote-endpoint = <&vpif_ch0>;
+				bus-width = <8>;
+			};
+		};
+	};
+
+};
diff --git a/Documentation/devicetree/bindings/media/ti,da850-vpif.txt b/Documentation/devicetree/bindings/media/ti,da850-vpif.txt
new file mode 100644
index 000000000000..d004e600aabe
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/ti,da850-vpif.txt
@@ -0,0 +1,8 @@
+Texas Instruments VPIF
+----------------------
+
+The Video Port InterFace (VPIF) is the core component for video output
+and capture on DA850 TI Davinci SoCs.
+
+- compatible: must be "ti,da850-vpif"
+- reg: physical base address and length of the registers set for the device;
-- 
2.9.3

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Re: [PATCH v2 4/4] [media] dt-bindings: add TI VPIF documentation

[Hans Verkuil]

On 22/11/16 02:44, Kevin Hilman wrote:
> Cc: Rob Herring <robh@kernel.org>
> Signed-off-by: Kevin Hilman <khilman@baylibre.com>
> ---
>  .../bindings/media/ti,da850-vpif-capture.txt       | 65 ++++++++++++++++++++++
>  .../devicetree/bindings/media/ti,da850-vpif.txt    |  8 +++
>  2 files changed, 73 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/media/ti,da850-vpif-capture.txt
>  create mode 100644 Documentation/devicetree/bindings/media/ti,da850-vpif.txt
>
> diff --git a/Documentation/devicetree/bindings/media/ti,da850-vpif-capture.txt b/Documentation/devicetree/bindings/media/ti,da850-vpif-capture.txt
> new file mode 100644
> index 000000000000..bdd93267301f
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/ti,da850-vpif-capture.txt
> @@ -0,0 +1,65 @@
> +Texas Instruments VPIF Capture
> +------------------------------
> +
> +The TI Video Port InterFace (VPIF) capture component is the primary
> +component for video capture on the DA850 family of TI DaVinci SoCs.
> +
> +TI Document number reference: SPRUH82C
> +
> +Required properties:
> +- compatible: must be "ti,da850-vpif-capture"
> +- reg: physical base address and length of the registers set for the device;
> +- interrupts: should contain IRQ line for the VPIF
> +
> +VPIF capture has a 16-bit parallel bus input, supporting 2 8-bit
> +channels or a single 16-bit channel.  It should contain at least one
> +port child node with child 'endpoint' node. Please refer to the
> +bindings defined in
> +Documentation/devicetree/bindings/media/video-interfaces.txt.
> +
> +Example using 2 8-bit input channels, one of which is connected to an
> +I2C-connected TVP5147 decoder:
> +
> +	vpif_capture: video-capture@0x00217000 {
> +		compatible = "ti,vpif-capture";

Did you forget to update the compatible string to ti,da850-vpif-capture?

	Hans

> +		reg = <0x00217000 0x1000>;
> +		interrupts = <92>;
> +
> +		port {
> +			vpif_ch0: endpoint@0 {
> +				  reg = <0>;
> +				  bus-width = <8>;
> +				  remote-endpoint = <&composite>;
> +			};
> +
> +			vpif_ch1: endpoint@1 {
> +				  reg = <1>;
> +				  bus-width = <8>;
> +				  data-shift = <8>;
> +			};
> +		};
> +	};
> +
> +[ ... ]
> +
> +&i2c0 {
> +
> +	tvp5147@5d {
> +		compatible = "ti,tvp5147";
> +		reg = <0x5d>;
> +		status = "okay";
> +
> +		port {
> +			composite: endpoint {
> +				hsync-active = <1>;
> +				vsync-active = <1>;
> +				pclk-sample = <0>;
> +
> +				/* VPIF channel 0 (lower 8-bits) */
> +				remote-endpoint = <&vpif_ch0>;
> +				bus-width = <8>;
> +			};
> +		};
> +	};
> +
> +};
> diff --git a/Documentation/devicetree/bindings/media/ti,da850-vpif.txt b/Documentation/devicetree/bindings/media/ti,da850-vpif.txt
> new file mode 100644
> index 000000000000..d004e600aabe
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/ti,da850-vpif.txt
> @@ -0,0 +1,8 @@
> +Texas Instruments VPIF
> +----------------------
> +
> +The Video Port InterFace (VPIF) is the core component for video output
> +and capture on DA850 TI Davinci SoCs.
> +
> +- compatible: must be "ti,da850-vpif"
> +- reg: physical base address and length of the registers set for the device;
>

Re: [PATCH v2 4/4] [media] dt-bindings: add TI VPIF documentation

[Kevin Hilman]

Hans Verkuil <hverkuil@xs4all.nl> writes:

> On 22/11/16 02:44, Kevin Hilman wrote:
>> Cc: Rob Herring <robh@kernel.org>
>> Signed-off-by: Kevin Hilman <khilman@baylibre.com>
>> ---
>>  .../bindings/media/ti,da850-vpif-capture.txt       | 65 ++++++++++++++++++++++
>>  .../devicetree/bindings/media/ti,da850-vpif.txt    |  8 +++
>>  2 files changed, 73 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/media/ti,da850-vpif-capture.txt
>>  create mode 100644 Documentation/devicetree/bindings/media/ti,da850-vpif.txt
>>
>> diff --git a/Documentation/devicetree/bindings/media/ti,da850-vpif-capture.txt b/Documentation/devicetree/bindings/media/ti,da850-vpif-capture.txt
>> new file mode 100644
>> index 000000000000..bdd93267301f
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/media/ti,da850-vpif-capture.txt
>> @@ -0,0 +1,65 @@
>> +Texas Instruments VPIF Capture
>> +------------------------------
>> +
>> +The TI Video Port InterFace (VPIF) capture component is the primary
>> +component for video capture on the DA850 family of TI DaVinci SoCs.
>> +
>> +TI Document number reference: SPRUH82C
>> +
>> +Required properties:
>> +- compatible: must be "ti,da850-vpif-capture"
>> +- reg: physical base address and length of the registers set for the device;
>> +- interrupts: should contain IRQ line for the VPIF
>> +
>> +VPIF capture has a 16-bit parallel bus input, supporting 2 8-bit
>> +channels or a single 16-bit channel.  It should contain at least one
>> +port child node with child 'endpoint' node. Please refer to the
>> +bindings defined in
>> +Documentation/devicetree/bindings/media/video-interfaces.txt.
>> +
>> +Example using 2 8-bit input channels, one of which is connected to an
>> +I2C-connected TVP5147 decoder:
>> +
>> +	vpif_capture: video-capture@0x00217000 {
>> +		compatible = "ti,vpif-capture";
>
> Did you forget to update the compatible string to ti,da850-vpif-capture?
>

Ugh, yup.   v3 coming right up.

Kevin