[RFC PATCH 0/7] atmel-isi: convert to a standalone driver

[RFC PATCH 0/7] atmel-isi: convert to a standalone driver

[Hans Verkuil]

From: Hans Verkuil <hans.verkuil@cisco.com>

This patch series converts the soc-camera atmel-isi to a standalone V4L2
driver.

The first 5 patches improve the ov7670 sensor driver, mostly adding modern
features such as MC and DT support.

The next patch converts the atmel-isi in-place. The final patch adds support
for this to the dts. I'm not at this moment planning to actually merge it,
it's an example only.

Once Songjun Wu's atmel-isc driver is merged I plan to make a follow-up patch
that moves this driver into the new platform/atmel directory.

Tested with my sama5d3-Xplained board and two ov7670 sensors: one with and one
without reset/pwdn pins.

Regards,

	Hans

Hans Verkuil (7):
  ov7670: add media controller support
  ov7670: call v4l2_async_register_subdev
  ov7670: fix g/s_parm
  ov7670: get xvclk
  ov7670: add devicetree support
  atmel-isi: remove dependency of the soc-camera framework
  sama5d3 dts: enable atmel-isi

 .../devicetree/bindings/media/i2c/ov7670.txt       |   44 +
 MAINTAINERS                                        |    1 +
 arch/arm/boot/dts/at91-sama5d3_xplained.dts        |   61 +-
 arch/arm/boot/dts/sama5d3.dtsi                     |    4 +-
 drivers/media/i2c/ov7670.c                         |   92 +-
 drivers/media/platform/soc_camera/Kconfig          |    3 +-
 drivers/media/platform/soc_camera/atmel-isi.c      | 1216 ++++++++++++--------
 7 files changed, 913 insertions(+), 508 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/media/i2c/ov7670.txt

-- 
2.8.1

[RFC PATCH 1/7] ov7670: add media controller support

[Hans Verkuil]

From: Hans Verkuil <hans.verkuil@cisco.com>

Add media controller support.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
---
 drivers/media/i2c/ov7670.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/media/i2c/ov7670.c b/drivers/media/i2c/ov7670.c
index 56cfb5c..25f46c7 100644
--- a/drivers/media/i2c/ov7670.c
+++ b/drivers/media/i2c/ov7670.c
@@ -210,6 +210,7 @@ struct ov7670_devtype {
 struct ov7670_format_struct;  /* coming later */
 struct ov7670_info {
 	struct v4l2_subdev sd;
+	struct media_pad pad;
 	struct v4l2_ctrl_handler hdl;
 	struct {
 		/* gain cluster */
@@ -1641,6 +1642,16 @@ static int ov7670_probe(struct i2c_client *client,
 		v4l2_ctrl_handler_free(&info->hdl);
 		return err;
 	}
+
+#if defined(CONFIG_MEDIA_CONTROLLER)
+	info->pad.flags = MEDIA_PAD_FL_SOURCE;
+	info->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
+	ret = media_entity_pads_init(&info->sd.entity, 1, &info->pad);
+	if (ret < 0) {
+		v4l2_ctrl_handler_free(&info->hdl);
+		return ret;
+	}
+#endif
 	/*
 	 * We have checked empirically that hw allows to read back the gain
 	 * value chosen by auto gain but that's not the case for auto exposure.
@@ -1662,6 +1673,9 @@ static int ov7670_remove(struct i2c_client *client)
 
 	v4l2_device_unregister_subdev(sd);
 	v4l2_ctrl_handler_free(&info->hdl);
+#if defined(CONFIG_MEDIA_CONTROLLER)
+	media_entity_cleanup(&sd->entity);
+#endif
 	return 0;
 }
 
-- 
2.8.1

[RFC PATCH 2/7] ov7670: call v4l2_async_register_subdev

[Hans Verkuil]

From: Hans Verkuil <hans.verkuil@cisco.com>

Add v4l2-async support for this driver.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
---
 drivers/media/i2c/ov7670.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/media/i2c/ov7670.c b/drivers/media/i2c/ov7670.c
index 25f46c7..26ad1a2 100644
--- a/drivers/media/i2c/ov7670.c
+++ b/drivers/media/i2c/ov7670.c
@@ -1662,6 +1662,14 @@ static int ov7670_probe(struct i2c_client *client,
 	v4l2_ctrl_cluster(2, &info->saturation);
 	v4l2_ctrl_handler_setup(&info->hdl);
 
+	ret = v4l2_async_register_subdev(&info->sd);
+	if (ret < 0) {
+#if defined(CONFIG_MEDIA_CONTROLLER)
+		media_entity_cleanup(&info->sd.entity);
+#endif
+		return ret;
+	}
+
 	return 0;
 }
 
-- 
2.8.1

[RFC PATCH 3/7] ov7670: fix g/s_parm

[Hans Verkuil]

From: Hans Verkuil <hans.verkuil@cisco.com>

Drop unnecesary memset. Drop the unnecessary extendedmode check and
set the V4L2_CAP_TIMEPERFRAME capability.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
---
 drivers/media/i2c/ov7670.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/media/i2c/ov7670.c b/drivers/media/i2c/ov7670.c
index 26ad1a2..fe527b2 100644
--- a/drivers/media/i2c/ov7670.c
+++ b/drivers/media/i2c/ov7670.c
@@ -1047,7 +1047,6 @@ static int ov7670_g_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parms)
 	if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 		return -EINVAL;
 
-	memset(cp, 0, sizeof(struct v4l2_captureparm));
 	cp->capability = V4L2_CAP_TIMEPERFRAME;
 	info->devtype->get_framerate(sd, &cp->timeperframe);
 
@@ -1062,9 +1061,8 @@ static int ov7670_s_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parms)
 
 	if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 		return -EINVAL;
-	if (cp->extendedmode != 0)
-		return -EINVAL;
 
+	cp->capability = V4L2_CAP_TIMEPERFRAME;
 	return info->devtype->set_framerate(sd, tpf);
 }
 
-- 
2.8.1

[RFC PATCH 4/7] ov7670: get xvclk

[Hans Verkuil]

From: Hans Verkuil <hans.verkuil@cisco.com>

Get the clock for this sensor.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
---
 drivers/media/i2c/ov7670.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/media/i2c/ov7670.c b/drivers/media/i2c/ov7670.c
index fe527b2..57adf3d 100644
--- a/drivers/media/i2c/ov7670.c
+++ b/drivers/media/i2c/ov7670.c
@@ -10,6 +10,7 @@
  * This file may be distributed under the terms of the GNU General
  * Public License, version 2.
  */
+#include <linux/clk.h>
 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/slab.h>
@@ -18,6 +19,7 @@
 #include <linux/videodev2.h>
 #include <media/v4l2-device.h>
 #include <media/v4l2-ctrls.h>
+#include <media/v4l2-clk.h>
 #include <media/v4l2-mediabus.h>
 #include <media/v4l2-image-sizes.h>
 #include <media/i2c/ov7670.h>
@@ -228,6 +230,7 @@ struct ov7670_info {
 		struct v4l2_ctrl *hue;
 	};
 	struct ov7670_format_struct *fmt;  /* Current format */
+	struct v4l2_clk *clk;
 	int min_width;			/* Filter out smaller sizes */
 	int min_height;			/* Filter out smaller sizes */
 	int clock_speed;		/* External clock speed (MHz) */
@@ -1588,8 +1591,19 @@ static int ov7670_probe(struct i2c_client *client,
 			info->pclk_hb_disable = true;
 	}
 
+	info->clk = v4l2_clk_get(&client->dev, "xvclk");
+	if (IS_ERR(info->clk))
+		return -EPROBE_DEFER;
+	v4l2_clk_enable(info->clk);
+
+	info->clock_speed = v4l2_clk_get_rate(info->clk) / 1000000;
+	if (info->clock_speed < 12 ||
+	    info->clock_speed > 48)
+		return -EINVAL;
+
 	/* Make sure it's an ov7670 */
 	ret = ov7670_detect(sd);
+
 	if (ret) {
 		v4l_dbg(1, debug, client,
 			"chip found @ 0x%x (%s) is not an ov7670 chip.\n",
@@ -1682,6 +1696,7 @@ static int ov7670_remove(struct i2c_client *client)
 #if defined(CONFIG_MEDIA_CONTROLLER)
 	media_entity_cleanup(&sd->entity);
 #endif
+	v4l2_clk_put(info->clk);
 	return 0;
 }
 
-- 
2.8.1

[RFC PATCH 5/7] ov7670: add devicetree support

[Hans Verkuil]

From: Hans Verkuil <hans.verkuil@cisco.com>

Add DT support. Use it to get the reset and pwdn pins (if there are any).
Tested with one sensor requiring reset/pwdn and one sensor that doesn't
have reset/pwdn pins.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
---
 .../devicetree/bindings/media/i2c/ov7670.txt       | 44 +++++++++++++++++++
 MAINTAINERS                                        |  1 +
 drivers/media/i2c/ov7670.c                         | 51 ++++++++++++++++++++++
 3 files changed, 96 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/media/i2c/ov7670.txt

diff --git a/Documentation/devicetree/bindings/media/i2c/ov7670.txt b/Documentation/devicetree/bindings/media/i2c/ov7670.txt
new file mode 100644
index 0000000..3231c47
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/i2c/ov7670.txt
@@ -0,0 +1,44 @@
+* Omnivision OV7670 CMOS sensor
+
+The Omnivision OV7670 sensor support multiple resolutions output, such as
+CIF, SVGA, UXGA. It also can support YUV422/420, RGB565/555 or raw RGB
+output format.
+
+Required Properties:
+- compatible: should be "ovti,ov7670"
+- clocks: reference to the xvclk input clock.
+- clock-names: should be "xvclk".
+
+Optional Properties:
+- resetb-gpios: reference to the GPIO connected to the resetb pin, if any.
+- pwdn-gpios: reference to the GPIO connected to the pwdn pin, if any.
+
+The device node must contain one 'port' child node for its digital output
+video port, in accordance with the video interface bindings defined in
+Documentation/devicetree/bindings/media/video-interfaces.txt.
+
+Example:
+
+	i2c1: i2c@f0018000 {
+		status = "okay";
+
+		ov7670: camera@0x21 {
+			compatible = "ovti,ov7670";
+			reg = <0x21>;
+			pinctrl-names = "default";
+			pinctrl-0 = <&pinctrl_pck0_as_isi_mck &pinctrl_sensor_power &pinctrl_sensor_reset>;
+			resetb-gpios = <&pioE 11 GPIO_ACTIVE_LOW>;
+			pwdn-gpios = <&pioE 13 GPIO_ACTIVE_HIGH>;
+			clocks = <&pck0>;
+			clock-names = "xvclk";
+			assigned-clocks = <&pck0>;
+			assigned-clock-rates = <24000000>;
+
+			port {
+				ov7670_0: endpoint {
+					remote-endpoint = <&isi_0>;
+					bus-width = <8>;
+				};
+			};
+		};
+	};
diff --git a/MAINTAINERS b/MAINTAINERS
index 20bb1d0..1fec3a6 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -8615,6 +8615,7 @@ L:	linux-media@vger.kernel.org
 T:	git git://linuxtv.org/media_tree.git
 S:	Maintained
 F:	drivers/media/i2c/ov7670.c
+F:	Documentation/devicetree/bindings/media/i2c/ov7670.txt
 
 ONENAND FLASH DRIVER
 M:	Kyungmin Park <kyungmin.park@samsung.com>
diff --git a/drivers/media/i2c/ov7670.c b/drivers/media/i2c/ov7670.c
index 57adf3d..a401b99 100644
--- a/drivers/media/i2c/ov7670.c
+++ b/drivers/media/i2c/ov7670.c
@@ -17,6 +17,9 @@
 #include <linux/i2c.h>
 #include <linux/delay.h>
 #include <linux/videodev2.h>
+#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
+#include <linux/of_gpio.h>
 #include <media/v4l2-device.h>
 #include <media/v4l2-ctrls.h>
 #include <media/v4l2-clk.h>
@@ -231,6 +234,8 @@ struct ov7670_info {
 	};
 	struct ov7670_format_struct *fmt;  /* Current format */
 	struct v4l2_clk *clk;
+	struct gpio_desc *resetb_gpio;
+	struct gpio_desc *pwdn_gpio;
 	int min_width;			/* Filter out smaller sizes */
 	int min_height;			/* Filter out smaller sizes */
 	int clock_speed;		/* External clock speed (MHz) */
@@ -1551,6 +1556,40 @@ static const struct ov7670_devtype ov7670_devdata[] = {
 	},
 };
 
+static int ov7670_probe_dt(struct i2c_client *client,
+		struct ov7670_info *info)
+{
+	/* Request the reset GPIO deasserted */
+	info->resetb_gpio = devm_gpiod_get_optional(&client->dev, "resetb",
+			GPIOD_OUT_LOW);
+	if (!info->resetb_gpio)
+		dev_dbg(&client->dev, "resetb gpio is not assigned!\n");
+	else if (IS_ERR(info->resetb_gpio)) {
+		dev_info(&client->dev, "no resetb\n");
+		return PTR_ERR(info->resetb_gpio);
+	}
+
+	/* Request the power down GPIO asserted */
+	info->pwdn_gpio = devm_gpiod_get_optional(&client->dev, "pwdn",
+			GPIOD_OUT_LOW);
+	if (!info->pwdn_gpio)
+		dev_dbg(&client->dev, "pwdn gpio is not assigned!\n");
+	else if (IS_ERR(info->pwdn_gpio)) {
+		dev_info(&client->dev, "no pwdn\n");
+		return PTR_ERR(info->pwdn_gpio);
+	}
+
+	if (info->resetb_gpio) {
+		/* Active the resetb pin to perform a reset pulse */
+		gpiod_direction_output(info->resetb_gpio, 1);
+		usleep_range(3000, 5000);
+		gpiod_direction_output(info->resetb_gpio, 0);
+	}
+	usleep_range(3000, 5000);
+
+	return 0;
+}
+
 static int ov7670_probe(struct i2c_client *client,
 			const struct i2c_device_id *id)
 {
@@ -1596,6 +1635,10 @@ static int ov7670_probe(struct i2c_client *client,
 		return -EPROBE_DEFER;
 	v4l2_clk_enable(info->clk);
 
+	ret = ov7670_probe_dt(client, info);
+	if (ret)
+		return ret;
+
 	info->clock_speed = v4l2_clk_get_rate(info->clk) / 1000000;
 	if (info->clock_speed < 12 ||
 	    info->clock_speed > 48)
@@ -1707,6 +1750,14 @@ static const struct i2c_device_id ov7670_id[] = {
 };
 MODULE_DEVICE_TABLE(i2c, ov7670_id);
 
+#if IS_ENABLED(CONFIG_OF)
+static const struct of_device_id ov7670_of_match[] = {
+	{ .compatible = "ovti,ov7670", },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, ov7670_of_match);
+#endif
+
 static struct i2c_driver ov7670_driver = {
 	.driver = {
 		.name	= "ov7670",
-- 
2.8.1

[RFC PATCH 6/7] atmel-isi: remove dependency of the soc-camera framework

[Hans Verkuil]

From: Hans Verkuil <hans.verkuil@cisco.com>

This patch converts the atmel-isi driver from a soc-camera driver to a driver
that is stand-alone.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
---
 drivers/media/platform/soc_camera/Kconfig     |    3 +-
 drivers/media/platform/soc_camera/atmel-isi.c | 1216 +++++++++++++++----------
 2 files changed, 721 insertions(+), 498 deletions(-)

diff --git a/drivers/media/platform/soc_camera/Kconfig b/drivers/media/platform/soc_camera/Kconfig
index 39f6641..f74e358 100644
--- a/drivers/media/platform/soc_camera/Kconfig
+++ b/drivers/media/platform/soc_camera/Kconfig
@@ -54,9 +54,8 @@ config VIDEO_SH_MOBILE_CEU
 
 config VIDEO_ATMEL_ISI
 	tristate "ATMEL Image Sensor Interface (ISI) support"
-	depends on VIDEO_DEV && SOC_CAMERA
+	depends on VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API && OF && HAS_DMA
 	depends on ARCH_AT91 || COMPILE_TEST
-	depends on HAS_DMA
 	select VIDEOBUF2_DMA_CONTIG
 	---help---
 	  This module makes the ATMEL Image Sensor Interface available
diff --git a/drivers/media/platform/soc_camera/atmel-isi.c b/drivers/media/platform/soc_camera/atmel-isi.c
index 30211f6..9947acb 100644
--- a/drivers/media/platform/soc_camera/atmel-isi.c
+++ b/drivers/media/platform/soc_camera/atmel-isi.c
@@ -22,18 +22,22 @@
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/slab.h>
-
-#include <media/soc_camera.h>
-#include <media/drv-intf/soc_mediabus.h>
+#include <linux/of.h>
+
+#include <linux/videodev2.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-dev.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-event.h>
 #include <media/v4l2-of.h>
 #include <media/videobuf2-dma-contig.h>
+#include <media/v4l2-image-sizes.h>
 
 #include "atmel-isi.h"
 
-#define MAX_BUFFER_NUM			32
 #define MAX_SUPPORT_WIDTH		2048
 #define MAX_SUPPORT_HEIGHT		2048
-#define VID_LIMIT_BYTES			(16 * 1024 * 1024)
 #define MIN_FRAME_RATE			15
 #define FRAME_INTERVAL_MILLI_SEC	(1000 / MIN_FRAME_RATE)
 
@@ -65,9 +69,39 @@ struct frame_buffer {
 	struct list_head list;
 };
 
+struct isi_graph_entity {
+	struct device_node *node;
+	struct media_entity *entity;
+	struct v4l2_subdev_pad_config *config;
+
+	struct v4l2_async_subdev asd;
+	struct v4l2_subdev *subdev;
+};
+
+/*
+ * struct isi_format - ISI media bus format information
+ * @fourcc:		Fourcc code for this format
+ * @mbus_code:		V4L2 media bus format code.
+ * @bpp:		Bytes per pixel (when stored in memory)
+ * @swap:		Byte swap configuration value
+ * @support:		Indicates format supported by subdev
+ * @skip:		Skip duplicate format supported by subdev
+ */
+struct isi_format {
+	u32	fourcc;
+	u32	mbus_code;
+	u8	bpp;
+	u32	swap;
+
+	bool	support;
+	bool	skip;
+};
+
+
 struct atmel_isi {
 	/* Protects the access of variables shared with the ISR */
-	spinlock_t			lock;
+	spinlock_t			irqlock;
+	struct device			*dev;
 	void __iomem			*regs;
 
 	int				sequence;
@@ -76,7 +110,7 @@ struct atmel_isi {
 	struct fbd			*p_fb_descriptors;
 	dma_addr_t			fb_descriptors_phys;
 	struct				list_head dma_desc_head;
-	struct isi_dma_desc		dma_desc[MAX_BUFFER_NUM];
+	struct isi_dma_desc		dma_desc[VIDEO_MAX_FRAME];
 	bool				enable_preview_path;
 
 	struct completion		complete;
@@ -90,9 +124,22 @@ struct atmel_isi {
 	struct list_head		video_buffer_list;
 	struct frame_buffer		*active;
 
-	struct soc_camera_host		soc_host;
+	struct v4l2_device		v4l2_dev;
+	struct video_device		*vdev;
+	struct v4l2_async_notifier	notifier;
+	struct isi_graph_entity		entity;
+	struct v4l2_format		fmt;
+
+	struct isi_format		**user_formats;
+	unsigned int			num_user_formats;
+	const struct isi_format		*current_fmt;
+
+	struct mutex			lock;
+	struct vb2_queue		queue;
 };
 
+#define notifier_to_isi(n) container_of(n, struct atmel_isi, notifier)
+
 static void isi_writel(struct atmel_isi *isi, u32 reg, u32 val)
 {
 	writel(val, isi->regs + reg);
@@ -102,107 +149,46 @@ static u32 isi_readl(struct atmel_isi *isi, u32 reg)
 	return readl(isi->regs + reg);
 }
 
-static u32 setup_cfg2_yuv_swap(struct atmel_isi *isi,
-		const struct soc_camera_format_xlate *xlate)
-{
-	if (xlate->host_fmt->fourcc == V4L2_PIX_FMT_YUYV) {
-		/* all convert to YUYV */
-		switch (xlate->code) {
-		case MEDIA_BUS_FMT_VYUY8_2X8:
-			return ISI_CFG2_YCC_SWAP_MODE_3;
-		case MEDIA_BUS_FMT_UYVY8_2X8:
-			return ISI_CFG2_YCC_SWAP_MODE_2;
-		case MEDIA_BUS_FMT_YVYU8_2X8:
-			return ISI_CFG2_YCC_SWAP_MODE_1;
-		}
-	} else if (xlate->host_fmt->fourcc == V4L2_PIX_FMT_RGB565) {
-		/*
-		 * Preview path is enabled, it will convert UYVY to RGB format.
-		 * But if sensor output format is not UYVY, we need to set
-		 * YCC_SWAP_MODE to convert it as UYVY.
-		 */
-		switch (xlate->code) {
-		case MEDIA_BUS_FMT_VYUY8_2X8:
-			return ISI_CFG2_YCC_SWAP_MODE_1;
-		case MEDIA_BUS_FMT_YUYV8_2X8:
-			return ISI_CFG2_YCC_SWAP_MODE_2;
-		case MEDIA_BUS_FMT_YVYU8_2X8:
-			return ISI_CFG2_YCC_SWAP_MODE_3;
-		}
-	}
-
-	/*
-	 * By default, no swap for the codec path of Atmel ISI. So codec
-	 * output is same as sensor's output.
-	 * For instance, if sensor's output is YUYV, then codec outputs YUYV.
-	 * And if sensor's output is UYVY, then codec outputs UYVY.
-	 */
-	return ISI_CFG2_YCC_SWAP_DEFAULT;
-}
+static struct isi_format isi_formats[] = {
+	{ V4L2_PIX_FMT_YUYV, MEDIA_BUS_FMT_YUYV8_2X8,
+	  2, ISI_CFG2_YCC_SWAP_DEFAULT, false },
+	{ V4L2_PIX_FMT_YUYV, MEDIA_BUS_FMT_YVYU8_2X8,
+	  2, ISI_CFG2_YCC_SWAP_MODE_1, false },
+	{ V4L2_PIX_FMT_YUYV, MEDIA_BUS_FMT_UYVY8_2X8,
+	  2, ISI_CFG2_YCC_SWAP_MODE_2, false },
+	{ V4L2_PIX_FMT_YUYV, MEDIA_BUS_FMT_VYUY8_2X8,
+	  2, ISI_CFG2_YCC_SWAP_MODE_3, false },
+	{ V4L2_PIX_FMT_RGB565, MEDIA_BUS_FMT_YUYV8_2X8,
+	  2, ISI_CFG2_YCC_SWAP_MODE_2, false },
+};
 
-static void configure_geometry(struct atmel_isi *isi, u32 width,
-		u32 height, const struct soc_camera_format_xlate *xlate)
+static void configure_geometry(struct atmel_isi *isi)
 {
-	u32 cfg2, psize;
-	u32 fourcc = xlate->host_fmt->fourcc;
+	u32 cfg2 = 0, psize;
+	u32 fourcc = isi->current_fmt->fourcc;
 
 	isi->enable_preview_path = fourcc == V4L2_PIX_FMT_RGB565 ||
 				   fourcc == V4L2_PIX_FMT_RGB32;
 
 	/* According to sensor's output format to set cfg2 */
-	switch (xlate->code) {
-	default:
-	/* Grey */
-	case MEDIA_BUS_FMT_Y8_1X8:
-		cfg2 = ISI_CFG2_GRAYSCALE | ISI_CFG2_COL_SPACE_YCbCr;
-		break;
-	/* YUV */
-	case MEDIA_BUS_FMT_VYUY8_2X8:
-	case MEDIA_BUS_FMT_UYVY8_2X8:
-	case MEDIA_BUS_FMT_YVYU8_2X8:
-	case MEDIA_BUS_FMT_YUYV8_2X8:
-		cfg2 = ISI_CFG2_COL_SPACE_YCbCr |
-				setup_cfg2_yuv_swap(isi, xlate);
-		break;
-	/* RGB, TODO */
-	}
+	cfg2 = isi->current_fmt->swap;
 
 	isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS);
 	/* Set width */
-	cfg2 |= ((width - 1) << ISI_CFG2_IM_HSIZE_OFFSET) &
+	cfg2 |= ((isi->fmt.fmt.pix.width - 1) << ISI_CFG2_IM_HSIZE_OFFSET) &
 			ISI_CFG2_IM_HSIZE_MASK;
 	/* Set height */
-	cfg2 |= ((height - 1) << ISI_CFG2_IM_VSIZE_OFFSET)
+	cfg2 |= ((isi->fmt.fmt.pix.height - 1) << ISI_CFG2_IM_VSIZE_OFFSET)
 			& ISI_CFG2_IM_VSIZE_MASK;
 	isi_writel(isi, ISI_CFG2, cfg2);
 
 	/* No down sampling, preview size equal to sensor output size */
-	psize = ((width - 1) << ISI_PSIZE_PREV_HSIZE_OFFSET) &
+	psize = ((isi->fmt.fmt.pix.width - 1) << ISI_PSIZE_PREV_HSIZE_OFFSET) &
 		ISI_PSIZE_PREV_HSIZE_MASK;
-	psize |= ((height - 1) << ISI_PSIZE_PREV_VSIZE_OFFSET) &
+	psize |= ((isi->fmt.fmt.pix.height - 1) << ISI_PSIZE_PREV_VSIZE_OFFSET) &
 		ISI_PSIZE_PREV_VSIZE_MASK;
 	isi_writel(isi, ISI_PSIZE, psize);
 	isi_writel(isi, ISI_PDECF, ISI_PDECF_NO_SAMPLING);
-
-	return;
-}
-
-static bool is_supported(struct soc_camera_device *icd,
-		const u32 pixformat)
-{
-	switch (pixformat) {
-	/* YUV, including grey */
-	case V4L2_PIX_FMT_GREY:
-	case V4L2_PIX_FMT_YUYV:
-	case V4L2_PIX_FMT_UYVY:
-	case V4L2_PIX_FMT_YVYU:
-	case V4L2_PIX_FMT_VYUY:
-	/* RGB */
-	case V4L2_PIX_FMT_RGB565:
-		return true;
-	default:
-		return false;
-	}
 }
 
 static irqreturn_t atmel_isi_handle_streaming(struct atmel_isi *isi)
@@ -214,6 +200,7 @@ static irqreturn_t atmel_isi_handle_streaming(struct atmel_isi *isi)
 		list_del_init(&buf->list);
 		vbuf->vb2_buf.timestamp = ktime_get_ns();
 		vbuf->sequence = isi->sequence++;
+		vbuf->field = V4L2_FIELD_NONE;
 		vb2_buffer_done(&vbuf->vb2_buf, VB2_BUF_STATE_DONE);
 	}
 
@@ -247,7 +234,7 @@ static irqreturn_t isi_interrupt(int irq, void *dev_id)
 	u32 status, mask, pending;
 	irqreturn_t ret = IRQ_NONE;
 
-	spin_lock(&isi->lock);
+	spin_lock(&isi->irqlock);
 
 	status = isi_readl(isi, ISI_STATUS);
 	mask = isi_readl(isi, ISI_INTMASK);
@@ -267,7 +254,7 @@ static irqreturn_t isi_interrupt(int irq, void *dev_id)
 			ret = atmel_isi_handle_streaming(isi);
 	}
 
-	spin_unlock(&isi->lock);
+	spin_unlock(&isi->irqlock);
 	return ret;
 }
 
@@ -305,26 +292,21 @@ static int queue_setup(struct vb2_queue *vq,
 				unsigned int *nbuffers, unsigned int *nplanes,
 				unsigned int sizes[], struct device *alloc_devs[])
 {
-	struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
-	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
-	struct atmel_isi *isi = ici->priv;
+	struct atmel_isi *isi = vq->drv_priv;
 	unsigned long size;
 
-	size = icd->sizeimage;
+	size = isi->fmt.fmt.pix.sizeimage;
 
-	if (!*nbuffers || *nbuffers > MAX_BUFFER_NUM)
-		*nbuffers = MAX_BUFFER_NUM;
-
-	if (size * *nbuffers > VID_LIMIT_BYTES)
-		*nbuffers = VID_LIMIT_BYTES / size;
+	/* Make sure the image size is large enough. */
+	if (*nplanes)
+		return sizes[0] < size ? -EINVAL : 0;
 
 	*nplanes = 1;
 	sizes[0] = size;
 
-	isi->sequence = 0;
 	isi->active = NULL;
 
-	dev_dbg(icd->parent, "%s, count=%d, size=%ld\n", __func__,
+	dev_dbg(isi->dev, "%s, count=%d, size=%ld\n", __func__,
 		*nbuffers, size);
 
 	return 0;
@@ -344,17 +326,15 @@ static int buffer_init(struct vb2_buffer *vb)
 static int buffer_prepare(struct vb2_buffer *vb)
 {
 	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
-	struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
 	struct frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb);
-	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
-	struct atmel_isi *isi = ici->priv;
+	struct atmel_isi *isi = vb->vb2_queue->drv_priv;
 	unsigned long size;
 	struct isi_dma_desc *desc;
 
-	size = icd->sizeimage;
+	size = isi->fmt.fmt.pix.sizeimage;
 
 	if (vb2_plane_size(vb, 0) < size) {
-		dev_err(icd->parent, "%s data will not fit into plane (%lu < %lu)\n",
+		dev_err(isi->dev, "%s data will not fit into plane (%lu < %lu)\n",
 				__func__, vb2_plane_size(vb, 0), size);
 		return -EINVAL;
 	}
@@ -363,7 +343,7 @@ static int buffer_prepare(struct vb2_buffer *vb)
 
 	if (!buf->p_dma_desc) {
 		if (list_empty(&isi->dma_desc_head)) {
-			dev_err(icd->parent, "Not enough dma descriptors.\n");
+			dev_err(isi->dev, "Not enough dma descriptors.\n");
 			return -EINVAL;
 		} else {
 			/* Get an available descriptor */
@@ -387,9 +367,7 @@ static int buffer_prepare(struct vb2_buffer *vb)
 static void buffer_cleanup(struct vb2_buffer *vb)
 {
 	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
-	struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
-	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
-	struct atmel_isi *isi = ici->priv;
+	struct atmel_isi *isi = vb->vb2_queue->drv_priv;
 	struct frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb);
 
 	/* This descriptor is available now and we add to head list */
@@ -409,7 +387,7 @@ static void start_dma(struct atmel_isi *isi, struct frame_buffer *buffer)
 	/* Check if already in a frame */
 	if (!isi->enable_preview_path) {
 		if (isi_readl(isi, ISI_STATUS) & ISI_CTRL_CDC) {
-			dev_err(isi->soc_host.icd->parent, "Already in frame handling.\n");
+			dev_err(isi->dev, "Already in frame handling.\n");
 			return;
 		}
 
@@ -443,13 +421,11 @@ static void start_dma(struct atmel_isi *isi, struct frame_buffer *buffer)
 static void buffer_queue(struct vb2_buffer *vb)
 {
 	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
-	struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
-	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
-	struct atmel_isi *isi = ici->priv;
+	struct atmel_isi *isi = vb->vb2_queue->drv_priv;
 	struct frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb);
 	unsigned long flags = 0;
 
-	spin_lock_irqsave(&isi->lock, flags);
+	spin_lock_irqsave(&isi->irqlock, flags);
 	list_add_tail(&buf->list, &isi->video_buffer_list);
 
 	if (isi->active == NULL) {
@@ -457,60 +433,68 @@ static void buffer_queue(struct vb2_buffer *vb)
 		if (vb2_is_streaming(vb->vb2_queue))
 			start_dma(isi, buf);
 	}
-	spin_unlock_irqrestore(&isi->lock, flags);
+	spin_unlock_irqrestore(&isi->irqlock, flags);
 }
 
 static int start_streaming(struct vb2_queue *vq, unsigned int count)
 {
-	struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
-	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
-	struct atmel_isi *isi = ici->priv;
+	struct atmel_isi *isi = vq->drv_priv;
+	struct frame_buffer *buf, *node;
 	int ret;
 
-	pm_runtime_get_sync(ici->v4l2_dev.dev);
+	pm_runtime_get_sync(isi->dev);
 
 	/* Reset ISI */
 	ret = atmel_isi_wait_status(isi, WAIT_ISI_RESET);
 	if (ret < 0) {
-		dev_err(icd->parent, "Reset ISI timed out\n");
-		pm_runtime_put(ici->v4l2_dev.dev);
-		return ret;
+		dev_err(isi->dev, "Reset ISI timed out\n");
+		pm_runtime_put(isi->dev);
+		goto err_start_stream;
 	}
 	/* Disable all interrupts */
 	isi_writel(isi, ISI_INTDIS, (u32)~0UL);
 
-	configure_geometry(isi, icd->user_width, icd->user_height,
-				icd->current_fmt);
+	isi->sequence = 0;
+	configure_geometry(isi);
 
-	spin_lock_irq(&isi->lock);
+	spin_lock_irq(&isi->irqlock);
 	/* Clear any pending interrupt */
 	isi_readl(isi, ISI_STATUS);
 
-	if (count)
-		start_dma(isi, isi->active);
-	spin_unlock_irq(&isi->lock);
+	start_dma(isi, isi->active);
+	spin_unlock_irq(&isi->irqlock);
 
 	return 0;
+
+err_start_stream:
+	spin_lock_irq(&isi->irqlock);
+	isi->active = NULL;
+	/* Release all active buffers */
+	list_for_each_entry_safe(buf, node, &isi->video_buffer_list, list) {
+		list_del_init(&buf->list);
+		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
+	}
+	spin_unlock_irq(&isi->irqlock);
+
+	return ret;
 }
 
 /* abort streaming and wait for last buffer */
 static void stop_streaming(struct vb2_queue *vq)
 {
-	struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
-	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
-	struct atmel_isi *isi = ici->priv;
+	struct atmel_isi *isi = vq->drv_priv;
 	struct frame_buffer *buf, *node;
 	int ret = 0;
 	unsigned long timeout;
 
-	spin_lock_irq(&isi->lock);
+	spin_lock_irq(&isi->irqlock);
 	isi->active = NULL;
 	/* Release all active buffers */
 	list_for_each_entry_safe(buf, node, &isi->video_buffer_list, list) {
 		list_del_init(&buf->list);
 		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 	}
-	spin_unlock_irq(&isi->lock);
+	spin_unlock_irq(&isi->irqlock);
 
 	if (!isi->enable_preview_path) {
 		timeout = jiffies + FRAME_INTERVAL_MILLI_SEC * HZ;
@@ -520,7 +504,7 @@ static void stop_streaming(struct vb2_queue *vq)
 			msleep(1);
 
 		if (time_after(jiffies, timeout))
-			dev_err(icd->parent,
+			dev_err(isi->dev,
 				"Timeout waiting for finishing codec request\n");
 	}
 
@@ -531,9 +515,9 @@ static void stop_streaming(struct vb2_queue *vq)
 	/* Disable ISI and wait for it is done */
 	ret = atmel_isi_wait_status(isi, WAIT_ISI_DISABLE);
 	if (ret < 0)
-		dev_err(icd->parent, "Disable ISI timed out\n");
+		dev_err(isi->dev, "Disable ISI timed out\n");
 
-	pm_runtime_put(ici->v4l2_dev.dev);
+	pm_runtime_put(isi->dev);
 }
 
 static struct vb2_ops isi_video_qops = {
@@ -548,380 +532,256 @@ static struct vb2_ops isi_video_qops = {
 	.wait_finish		= vb2_ops_wait_finish,
 };
 
-/* ------------------------------------------------------------------
-	SOC camera operations for the device
-   ------------------------------------------------------------------*/
-static int isi_camera_init_videobuf(struct vb2_queue *q,
-				     struct soc_camera_device *icd)
+static int isi_g_fmt_vid_cap(struct file *file, void *priv,
+			      struct v4l2_format *fmt)
 {
-	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+	struct atmel_isi *isi = video_drvdata(file);
 
-	q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-	q->io_modes = VB2_MMAP;
-	q->drv_priv = icd;
-	q->buf_struct_size = sizeof(struct frame_buffer);
-	q->ops = &isi_video_qops;
-	q->mem_ops = &vb2_dma_contig_memops;
-	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
-	q->lock = &ici->host_lock;
-	q->dev = ici->v4l2_dev.dev;
+	*fmt = isi->fmt;
 
-	return vb2_queue_init(q);
+	return 0;
 }
 
-static int isi_camera_set_fmt(struct soc_camera_device *icd,
-			      struct v4l2_format *f)
+static struct isi_format *find_format_by_fourcc(struct atmel_isi *isi,
+						 unsigned int fourcc)
+{
+	unsigned int num_formats = isi->num_user_formats;
+	struct isi_format *fmt;
+	unsigned int i;
+
+	for (i = 0; i < num_formats; i++) {
+		fmt = isi->user_formats[i];
+		if (fmt->fourcc == fourcc)
+			return fmt;
+	}
+
+	return NULL;
+}
+
+static int isi_try_fmt(struct atmel_isi *isi, struct v4l2_format *f,
+			struct isi_format **current_fmt)
 {
-	struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
-	const struct soc_camera_format_xlate *xlate;
-	struct v4l2_pix_format *pix = &f->fmt.pix;
+	struct isi_format *isi_fmt;
+	struct v4l2_pix_format *pixfmt = &f->fmt.pix;
 	struct v4l2_subdev_format format = {
-		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
+		.which = V4L2_SUBDEV_FORMAT_TRY,
 	};
-	struct v4l2_mbus_framefmt *mf = &format.format;
 	int ret;
 
-	/* check with atmel-isi support format, if not support use YUYV */
-	if (!is_supported(icd, pix->pixelformat))
-		pix->pixelformat = V4L2_PIX_FMT_YUYV;
-
-	xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat);
-	if (!xlate) {
-		dev_warn(icd->parent, "Format %x not found\n",
-			 pix->pixelformat);
+	if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 		return -EINVAL;
-	}
 
-	dev_dbg(icd->parent, "Plan to set format %dx%d\n",
-			pix->width, pix->height);
+	isi_fmt = find_format_by_fourcc(isi, pixfmt->pixelformat);
+	if (!isi_fmt) {
+		isi_fmt = isi->user_formats[isi->num_user_formats - 1];
+		pixfmt->pixelformat = isi_fmt->fourcc;
+	}
 
-	mf->width	= pix->width;
-	mf->height	= pix->height;
-	mf->field	= pix->field;
-	mf->colorspace	= pix->colorspace;
-	mf->code	= xlate->code;
+	/* Limit to Atmel ISC hardware capabilities */
+	if (pixfmt->width > MAX_SUPPORT_WIDTH)
+		pixfmt->width = MAX_SUPPORT_WIDTH;
+	if (pixfmt->height > MAX_SUPPORT_HEIGHT)
+		pixfmt->height = MAX_SUPPORT_HEIGHT;
 
-	ret = v4l2_subdev_call(sd, pad, set_fmt, NULL, &format);
+	v4l2_fill_mbus_format(&format.format, pixfmt, isi_fmt->mbus_code);
+	ret = v4l2_subdev_call(isi->entity.subdev, pad, set_fmt,
+			       isi->entity.config, &format);
 	if (ret < 0)
 		return ret;
 
-	if (mf->code != xlate->code)
-		return -EINVAL;
+	v4l2_fill_pix_format(pixfmt, &format.format);
 
-	pix->width		= mf->width;
-	pix->height		= mf->height;
-	pix->field		= mf->field;
-	pix->colorspace		= mf->colorspace;
-	icd->current_fmt	= xlate;
+	pixfmt->field = V4L2_FIELD_NONE;
+	pixfmt->bytesperline = pixfmt->width * isi_fmt->bpp;
+	pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
 
-	dev_dbg(icd->parent, "Finally set format %dx%d\n",
-		pix->width, pix->height);
+	if (current_fmt)
+		*current_fmt = isi_fmt;
 
-	return ret;
+	return 0;
 }
 
-static int isi_camera_try_fmt(struct soc_camera_device *icd,
-			      struct v4l2_format *f)
+static int isi_set_fmt(struct atmel_isi *isi, struct v4l2_format *f)
 {
-	struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
-	const struct soc_camera_format_xlate *xlate;
-	struct v4l2_pix_format *pix = &f->fmt.pix;
-	struct v4l2_subdev_pad_config pad_cfg;
 	struct v4l2_subdev_format format = {
-		.which = V4L2_SUBDEV_FORMAT_TRY,
+		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
 	};
-	struct v4l2_mbus_framefmt *mf = &format.format;
-	u32 pixfmt = pix->pixelformat;
+	struct isi_format *current_fmt;
 	int ret;
 
-	/* check with atmel-isi support format, if not support use YUYV */
-	if (!is_supported(icd, pix->pixelformat))
-		pix->pixelformat = V4L2_PIX_FMT_YUYV;
-
-	xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
-	if (pixfmt && !xlate) {
-		dev_warn(icd->parent, "Format %x not found\n", pixfmt);
-		return -EINVAL;
-	}
-
-	/* limit to Atmel ISI hardware capabilities */
-	if (pix->height > MAX_SUPPORT_HEIGHT)
-		pix->height = MAX_SUPPORT_HEIGHT;
-	if (pix->width > MAX_SUPPORT_WIDTH)
-		pix->width = MAX_SUPPORT_WIDTH;
-
-	/* limit to sensor capabilities */
-	mf->width	= pix->width;
-	mf->height	= pix->height;
-	mf->field	= pix->field;
-	mf->colorspace	= pix->colorspace;
-	mf->code	= xlate->code;
+	ret = isi_try_fmt(isi, f, &current_fmt);
+	if (ret)
+		return ret;
 
-	ret = v4l2_subdev_call(sd, pad, set_fmt, &pad_cfg, &format);
+	v4l2_fill_mbus_format(&format.format, &f->fmt.pix,
+			      current_fmt->mbus_code);
+	ret = v4l2_subdev_call(isi->entity.subdev, pad,
+			       set_fmt, NULL, &format);
 	if (ret < 0)
 		return ret;
 
-	pix->width	= mf->width;
-	pix->height	= mf->height;
-	pix->colorspace	= mf->colorspace;
-
-	switch (mf->field) {
-	case V4L2_FIELD_ANY:
-		pix->field = V4L2_FIELD_NONE;
-		break;
-	case V4L2_FIELD_NONE:
-		break;
-	default:
-		dev_err(icd->parent, "Field type %d unsupported.\n",
-			mf->field);
-		ret = -EINVAL;
-	}
+	isi->fmt = *f;
+	isi->current_fmt = current_fmt;
 
-	return ret;
+	return 0;
 }
 
-static const struct soc_mbus_pixelfmt isi_camera_formats[] = {
-	{
-		.fourcc			= V4L2_PIX_FMT_YUYV,
-		.name			= "Packed YUV422 16 bit",
-		.bits_per_sample	= 8,
-		.packing		= SOC_MBUS_PACKING_2X8_PADHI,
-		.order			= SOC_MBUS_ORDER_LE,
-		.layout			= SOC_MBUS_LAYOUT_PACKED,
-	},
-	{
-		.fourcc			= V4L2_PIX_FMT_RGB565,
-		.name			= "RGB565",
-		.bits_per_sample	= 8,
-		.packing		= SOC_MBUS_PACKING_2X8_PADHI,
-		.order			= SOC_MBUS_ORDER_LE,
-		.layout			= SOC_MBUS_LAYOUT_PACKED,
-	},
-};
-
-/* This will be corrected as we get more formats */
-static bool isi_camera_packing_supported(const struct soc_mbus_pixelfmt *fmt)
+static int isi_s_fmt_vid_cap(struct file *file, void *priv,
+			      struct v4l2_format *f)
 {
-	return	fmt->packing == SOC_MBUS_PACKING_NONE ||
-		(fmt->bits_per_sample == 8 &&
-		 fmt->packing == SOC_MBUS_PACKING_2X8_PADHI) ||
-		(fmt->bits_per_sample > 8 &&
-		 fmt->packing == SOC_MBUS_PACKING_EXTEND16);
+	struct atmel_isi *isi = video_drvdata(file);
+
+	if (vb2_is_streaming(&isi->queue))
+		return -EBUSY;
+
+	return isi_set_fmt(isi, f);
 }
 
-#define ISI_BUS_PARAM (V4L2_MBUS_MASTER |	\
-		V4L2_MBUS_HSYNC_ACTIVE_HIGH |	\
-		V4L2_MBUS_HSYNC_ACTIVE_LOW |	\
-		V4L2_MBUS_VSYNC_ACTIVE_HIGH |	\
-		V4L2_MBUS_VSYNC_ACTIVE_LOW |	\
-		V4L2_MBUS_PCLK_SAMPLE_RISING |	\
-		V4L2_MBUS_PCLK_SAMPLE_FALLING |	\
-		V4L2_MBUS_DATA_ACTIVE_HIGH)
-
-static int isi_camera_try_bus_param(struct soc_camera_device *icd,
-				    unsigned char buswidth)
+static int isi_try_fmt_vid_cap(struct file *file, void *priv,
+				struct v4l2_format *f)
 {
-	struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
-	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
-	struct atmel_isi *isi = ici->priv;
-	struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
-	unsigned long common_flags;
-	int ret;
+	struct atmel_isi *isi = video_drvdata(file);
 
-	ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
-	if (!ret) {
-		common_flags = soc_mbus_config_compatible(&cfg,
-							  ISI_BUS_PARAM);
-		if (!common_flags) {
-			dev_warn(icd->parent,
-				 "Flags incompatible: camera 0x%x, host 0x%x\n",
-				 cfg.flags, ISI_BUS_PARAM);
-			return -EINVAL;
-		}
-	} else if (ret != -ENOIOCTLCMD) {
-		return ret;
-	}
-
-	if ((1 << (buswidth - 1)) & isi->width_flags)
-		return 0;
-	return -EINVAL;
+	return isi_try_fmt(isi, f, NULL);
 }
 
-
-static int isi_camera_get_formats(struct soc_camera_device *icd,
-				  unsigned int idx,
-				  struct soc_camera_format_xlate *xlate)
+static int isi_enum_fmt_vid_cap(struct file *file, void  *priv,
+				struct v4l2_fmtdesc *f)
 {
-	struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
-	int formats = 0, ret, i, n;
-	/* sensor format */
-	struct v4l2_subdev_mbus_code_enum code = {
-		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
-		.index = idx,
-	};
-	/* soc camera host format */
-	const struct soc_mbus_pixelfmt *fmt;
+	struct atmel_isi *isi = video_drvdata(file);
 
-	ret = v4l2_subdev_call(sd, pad, enum_mbus_code, NULL, &code);
-	if (ret < 0)
-		/* No more formats */
-		return 0;
-
-	fmt = soc_mbus_get_fmtdesc(code.code);
-	if (!fmt) {
-		dev_err(icd->parent,
-			"Invalid format code #%u: %d\n", idx, code.code);
-		return 0;
-	}
+	if (f->index >= isi->num_user_formats)
+		return -EINVAL;
 
-	/* This also checks support for the requested bits-per-sample */
-	ret = isi_camera_try_bus_param(icd, fmt->bits_per_sample);
-	if (ret < 0) {
-		dev_err(icd->parent,
-			"Fail to try the bus parameters.\n");
-		return 0;
-	}
+	f->pixelformat = isi->user_formats[f->index]->fourcc;
+	return 0;
+}
 
-	switch (code.code) {
-	case MEDIA_BUS_FMT_UYVY8_2X8:
-	case MEDIA_BUS_FMT_VYUY8_2X8:
-	case MEDIA_BUS_FMT_YUYV8_2X8:
-	case MEDIA_BUS_FMT_YVYU8_2X8:
-		n = ARRAY_SIZE(isi_camera_formats);
-		formats += n;
-		for (i = 0; xlate && i < n; i++, xlate++) {
-			xlate->host_fmt	= &isi_camera_formats[i];
-			xlate->code	= code.code;
-			dev_dbg(icd->parent, "Providing format %s using code %d\n",
-				xlate->host_fmt->name, xlate->code);
-		}
-		break;
-	default:
-		if (!isi_camera_packing_supported(fmt))
-			return 0;
-		if (xlate)
-			dev_dbg(icd->parent,
-				"Providing format %s in pass-through mode\n",
-				fmt->name);
-	}
+static int isi_querycap(struct file *file, void *priv,
+			struct v4l2_capability *cap)
+{
+	strlcpy(cap->driver, "atmel-isi", sizeof(cap->driver));
+	strlcpy(cap->card, "Atmel Image Sensor Interface", sizeof(cap->card));
+	strlcpy(cap->bus_info, "platform:isi", sizeof(cap->bus_info));
+	return 0;
+}
 
-	/* Generic pass-through */
-	formats++;
-	if (xlate) {
-		xlate->host_fmt	= fmt;
-		xlate->code	= code.code;
-		xlate++;
-	}
+static int isi_enum_input(struct file *file, void *priv,
+			   struct v4l2_input *i)
+{
+	if (i->index != 0)
+		return -EINVAL;
 
-	return formats;
+	i->type = V4L2_INPUT_TYPE_CAMERA;
+	strlcpy(i->name, "Camera", sizeof(i->name));
+	return 0;
 }
 
-static int isi_camera_add_device(struct soc_camera_device *icd)
+static int isi_g_input(struct file *file, void *priv, unsigned int *i)
 {
-	dev_dbg(icd->parent, "Atmel ISI Camera driver attached to camera %d\n",
-		 icd->devnum);
+	*i = 0;
+	return 0;
+}
 
+static int isi_s_input(struct file *file, void *priv, unsigned int i)
+{
+	if (i > 0)
+		return -EINVAL;
 	return 0;
 }
 
-static void isi_camera_remove_device(struct soc_camera_device *icd)
+static int isi_g_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
 {
-	dev_dbg(icd->parent, "Atmel ISI Camera driver detached from camera %d\n",
-		 icd->devnum);
+	struct atmel_isi *isi = video_drvdata(file);
+
+	if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+		return -EINVAL;
+
+	a->parm.capture.readbuffers = 2;
+	return v4l2_subdev_call(isi->entity.subdev, video, g_parm, a);
 }
 
-static unsigned int isi_camera_poll(struct file *file, poll_table *pt)
+static int isi_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
 {
-	struct soc_camera_device *icd = file->private_data;
+	struct atmel_isi *isi = video_drvdata(file);
+
+	if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+		return -EINVAL;
 
-	return vb2_poll(&icd->vb2_vidq, file, pt);
+	a->parm.capture.readbuffers = 2;
+	return v4l2_subdev_call(isi->entity.subdev, video, s_parm, a);
 }
 
-static int isi_camera_querycap(struct soc_camera_host *ici,
-			       struct v4l2_capability *cap)
+static int isi_enum_framesizes(struct file *file, void *fh,
+			       struct v4l2_frmsizeenum *fsize)
 {
-	strcpy(cap->driver, "atmel-isi");
-	strcpy(cap->card, "Atmel Image Sensor Interface");
-	cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
-	cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
+	struct atmel_isi *isi = video_drvdata(file);
+	const struct isi_format *isi_fmt;
+	struct v4l2_subdev_frame_size_enum fse = {
+		.index = fsize->index,
+		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
+	};
+	int ret;
+
+	isi_fmt = find_format_by_fourcc(isi, fsize->pixel_format);
+	if (!isi_fmt)
+		return -EINVAL;
+
+	fse.code = isi_fmt->mbus_code;
+
+	ret = v4l2_subdev_call(isi->entity.subdev, pad, enum_frame_size,
+			       NULL, &fse);
+	if (ret)
+		return ret;
+
+	fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
+	fsize->discrete.width = fse.max_width;
+	fsize->discrete.height = fse.max_height;
 
 	return 0;
 }
 
-static int isi_camera_set_bus_param(struct soc_camera_device *icd)
+static int isi_enum_frameintervals(struct file *file, void *fh,
+				    struct v4l2_frmivalenum *fival)
 {
-	struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
-	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
-	struct atmel_isi *isi = ici->priv;
-	struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
-	unsigned long common_flags;
+	struct atmel_isi *isi = video_drvdata(file);
+	const struct isi_format *isi_fmt;
+	struct v4l2_subdev_frame_interval_enum fie = {
+		.index = fival->index,
+		.width = fival->width,
+		.height = fival->height,
+		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
+	};
 	int ret;
-	u32 cfg1 = 0;
 
-	ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
-	if (!ret) {
-		common_flags = soc_mbus_config_compatible(&cfg,
-							  ISI_BUS_PARAM);
-		if (!common_flags) {
-			dev_warn(icd->parent,
-				 "Flags incompatible: camera 0x%x, host 0x%x\n",
-				 cfg.flags, ISI_BUS_PARAM);
-			return -EINVAL;
-		}
-	} else if (ret != -ENOIOCTLCMD) {
+	isi_fmt = find_format_by_fourcc(isi, fival->pixel_format);
+	if (!isi_fmt)
+		return -EINVAL;
+
+	fie.code = isi_fmt->mbus_code;
+
+	ret = v4l2_subdev_call(isi->entity.subdev, pad,
+			       enum_frame_interval, NULL, &fie);
+	if (ret)
 		return ret;
-	} else {
-		common_flags = ISI_BUS_PARAM;
-	}
-	dev_dbg(icd->parent, "Flags cam: 0x%x host: 0x%x common: 0x%lx\n",
-		cfg.flags, ISI_BUS_PARAM, common_flags);
-
-	/* Make choises, based on platform preferences */
-	if ((common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) &&
-	    (common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)) {
-		if (isi->pdata.hsync_act_low)
-			common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_HIGH;
-		else
-			common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_LOW;
-	}
 
-	if ((common_flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH) &&
-	    (common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)) {
-		if (isi->pdata.vsync_act_low)
-			common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_HIGH;
-		else
-			common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_LOW;
-	}
+	fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
+	fival->discrete = fie.interval;
 
-	if ((common_flags & V4L2_MBUS_PCLK_SAMPLE_RISING) &&
-	    (common_flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)) {
-		if (isi->pdata.pclk_act_falling)
-			common_flags &= ~V4L2_MBUS_PCLK_SAMPLE_RISING;
-		else
-			common_flags &= ~V4L2_MBUS_PCLK_SAMPLE_FALLING;
-	}
+	return 0;
+}
 
-	cfg.flags = common_flags;
-	ret = v4l2_subdev_call(sd, video, s_mbus_config, &cfg);
-	if (ret < 0 && ret != -ENOIOCTLCMD) {
-		dev_dbg(icd->parent, "camera s_mbus_config(0x%lx) returned %d\n",
-			common_flags, ret);
-		return ret;
-	}
+static void isi_camera_set_bus_param(struct atmel_isi *isi)
+{
+	u32 cfg1 = 0;
 
 	/* set bus param for ISI */
-	if (common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
+	if (isi->pdata.hsync_act_low)
 		cfg1 |= ISI_CFG1_HSYNC_POL_ACTIVE_LOW;
-	if (common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
+	if (isi->pdata.vsync_act_low)
 		cfg1 |= ISI_CFG1_VSYNC_POL_ACTIVE_LOW;
-	if (common_flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
+	if (isi->pdata.pclk_act_falling)
 		cfg1 |= ISI_CFG1_PIXCLK_POL_ACTIVE_FALLING;
-
-	dev_dbg(icd->parent, "vsync active %s, hsync active %s, sampling on pix clock %s edge\n",
-		common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW ? "low" : "high",
-		common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW ? "low" : "high",
-		common_flags & V4L2_MBUS_PCLK_SAMPLE_FALLING ? "falling" : "rising");
-
 	if (isi->pdata.has_emb_sync)
 		cfg1 |= ISI_CFG1_EMB_SYNC;
 	if (isi->pdata.full_mode)
@@ -930,50 +790,19 @@ static int isi_camera_set_bus_param(struct soc_camera_device *icd)
 	cfg1 |= ISI_CFG1_THMASK_BEATS_16;
 
 	/* Enable PM and peripheral clock before operate isi registers */
-	pm_runtime_get_sync(ici->v4l2_dev.dev);
+	pm_runtime_get_sync(isi->dev);
 
 	isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS);
 	isi_writel(isi, ISI_CFG1, cfg1);
 
-	pm_runtime_put(ici->v4l2_dev.dev);
-
-	return 0;
+	pm_runtime_put(isi->dev);
 }
 
-static struct soc_camera_host_ops isi_soc_camera_host_ops = {
-	.owner		= THIS_MODULE,
-	.add		= isi_camera_add_device,
-	.remove		= isi_camera_remove_device,
-	.set_fmt	= isi_camera_set_fmt,
-	.try_fmt	= isi_camera_try_fmt,
-	.get_formats	= isi_camera_get_formats,
-	.init_videobuf2	= isi_camera_init_videobuf,
-	.poll		= isi_camera_poll,
-	.querycap	= isi_camera_querycap,
-	.set_bus_param	= isi_camera_set_bus_param,
-};
-
 /* -----------------------------------------------------------------------*/
-static int atmel_isi_remove(struct platform_device *pdev)
-{
-	struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
-	struct atmel_isi *isi = container_of(soc_host,
-					struct atmel_isi, soc_host);
-
-	soc_camera_host_unregister(soc_host);
-	dma_free_coherent(&pdev->dev,
-			sizeof(struct fbd) * MAX_BUFFER_NUM,
-			isi->p_fb_descriptors,
-			isi->fb_descriptors_phys);
-	pm_runtime_disable(&pdev->dev);
-
-	return 0;
-}
-
 static int atmel_isi_parse_dt(struct atmel_isi *isi,
 			struct platform_device *pdev)
 {
-	struct device_node *np= pdev->dev.of_node;
+	struct device_node *np = pdev->dev.of_node;
 	struct v4l2_of_endpoint ep;
 	int err;
 
@@ -1021,13 +850,356 @@ static int atmel_isi_parse_dt(struct atmel_isi *isi,
 	return 0;
 }
 
+static int isi_open(struct file *file)
+{
+	struct atmel_isi *isi = video_drvdata(file);
+	struct v4l2_subdev *sd = isi->entity.subdev;
+	int ret;
+
+	if (mutex_lock_interruptible(&isi->lock))
+		return -ERESTARTSYS;
+
+	ret = v4l2_fh_open(file);
+	if (ret < 0)
+		goto unlock;
+
+	if (!v4l2_fh_is_singular_file(file))
+		goto unlock;
+
+	ret = v4l2_subdev_call(sd, core, s_power, 1);
+	if (ret < 0 && ret != -ENOIOCTLCMD)
+		goto unlock;
+
+	ret = isi_set_fmt(isi, &isi->fmt);
+	if (ret)
+		v4l2_subdev_call(sd, core, s_power, 0);
+unlock:
+	mutex_unlock(&isi->lock);
+	return ret;
+}
+
+static int isi_release(struct file *file)
+{
+	struct atmel_isi *isi = video_drvdata(file);
+	struct v4l2_subdev *sd = isi->entity.subdev;
+	bool fh_singular;
+	int ret;
+
+	mutex_lock(&isi->lock);
+
+	fh_singular = v4l2_fh_is_singular_file(file);
+
+	ret = _vb2_fop_release(file, NULL);
+
+	if (fh_singular)
+		v4l2_subdev_call(sd, core, s_power, 0);
+
+	mutex_unlock(&isi->lock);
+
+	return ret;
+}
+
+static const struct v4l2_ioctl_ops isi_ioctl_ops = {
+	.vidioc_querycap		= isi_querycap,
+
+	.vidioc_try_fmt_vid_cap		= isi_try_fmt_vid_cap,
+	.vidioc_g_fmt_vid_cap		= isi_g_fmt_vid_cap,
+	.vidioc_s_fmt_vid_cap		= isi_s_fmt_vid_cap,
+	.vidioc_enum_fmt_vid_cap	= isi_enum_fmt_vid_cap,
+
+	.vidioc_enum_input		= isi_enum_input,
+	.vidioc_g_input			= isi_g_input,
+	.vidioc_s_input			= isi_s_input,
+
+	.vidioc_g_parm			= isi_g_parm,
+	.vidioc_s_parm			= isi_s_parm,
+	.vidioc_enum_framesizes		= isi_enum_framesizes,
+	.vidioc_enum_frameintervals	= isi_enum_frameintervals,
+
+	.vidioc_reqbufs			= vb2_ioctl_reqbufs,
+	.vidioc_create_bufs		= vb2_ioctl_create_bufs,
+	.vidioc_querybuf		= vb2_ioctl_querybuf,
+	.vidioc_qbuf			= vb2_ioctl_qbuf,
+	.vidioc_dqbuf			= vb2_ioctl_dqbuf,
+	.vidioc_expbuf			= vb2_ioctl_expbuf,
+	.vidioc_prepare_buf		= vb2_ioctl_prepare_buf,
+	.vidioc_streamon		= vb2_ioctl_streamon,
+	.vidioc_streamoff		= vb2_ioctl_streamoff,
+
+	.vidioc_log_status		= v4l2_ctrl_log_status,
+	.vidioc_subscribe_event		= v4l2_ctrl_subscribe_event,
+	.vidioc_unsubscribe_event	= v4l2_event_unsubscribe,
+};
+
+static const struct v4l2_file_operations isi_fops = {
+	.owner		= THIS_MODULE,
+	.unlocked_ioctl	= video_ioctl2,
+	.open		= isi_open,
+	.release	= isi_release,
+	.poll		= vb2_fop_poll,
+	.mmap		= vb2_fop_mmap,
+	.read		= vb2_fop_read,
+};
+
+static int isi_set_default_fmt(struct atmel_isi *isi)
+{
+	struct v4l2_format f = {
+		.type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
+		.fmt.pix = {
+			.width		= VGA_WIDTH,
+			.height		= VGA_HEIGHT,
+			.field		= V4L2_FIELD_NONE,
+			.pixelformat	= isi->user_formats[0]->fourcc,
+		},
+	};
+	int ret;
+
+	ret = isi_try_fmt(isi, &f, NULL);
+	if (ret)
+		return ret;
+	isi->current_fmt = isi->user_formats[0];
+	isi->fmt = f;
+	return 0;
+}
+
+static struct isi_format *find_format_by_code(unsigned int code, int *index)
+{
+	struct isi_format *fmt = &isi_formats[0];
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(isi_formats); i++) {
+		if (fmt->mbus_code == code && !fmt->support && !fmt->skip) {
+			*index = i;
+			return fmt;
+		}
+
+		fmt++;
+	}
+
+	return NULL;
+}
+
+static int isi_formats_init(struct atmel_isi *isi)
+{
+	struct isi_format *fmt;
+	struct v4l2_subdev *subdev = isi->entity.subdev;
+	int num_fmts = 0, i, j;
+	struct v4l2_subdev_mbus_code_enum mbus_code = {
+		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
+	};
+
+	fmt = &isi_formats[0];
+
+	while (!v4l2_subdev_call(subdev, pad, enum_mbus_code,
+	       NULL, &mbus_code)) {
+		fmt = find_format_by_code(mbus_code.code, &i);
+		if (!fmt || fmt->skip) {
+			mbus_code.index++;
+			continue;
+		}
+
+		fmt->support = true;
+		for (i = 0; i < ARRAY_SIZE(isi_formats); i++)
+			if (isi_formats[i].fourcc == fmt->fourcc &&
+			    !fmt->support)
+				isi_formats[i].skip = true;
+		num_fmts++;
+	}
+
+	if (!num_fmts)
+		return -ENXIO;
+
+	isi->num_user_formats = num_fmts;
+	isi->user_formats = devm_kcalloc(isi->dev,
+					 num_fmts, sizeof(struct isi_format *),
+					 GFP_KERNEL);
+	if (!isi->user_formats) {
+		v4l2_err(&isi->v4l2_dev, "could not allocate memory\n");
+		return -ENOMEM;
+	}
+
+	fmt = &isi_formats[0];
+	for (i = 0, j = 0; i < ARRAY_SIZE(isi_formats); i++) {
+		if (fmt->support)
+			isi->user_formats[j++] = fmt;
+
+		fmt++;
+	}
+	isi->current_fmt = isi->user_formats[0];
+
+	return 0;
+}
+
+static int isi_graph_notify_complete(struct v4l2_async_notifier *notifier)
+{
+	struct atmel_isi *isi = notifier_to_isi(notifier);
+	int ret;
+
+	ret = v4l2_device_register_subdev_nodes(&isi->v4l2_dev);
+	if (ret < 0) {
+		dev_err(isi->dev, "Failed to register subdev nodes\n");
+		return ret;
+	}
+
+	isi->vdev->ctrl_handler	= isi->entity.subdev->ctrl_handler;
+	isi->entity.config = v4l2_subdev_alloc_pad_config(isi->entity.subdev);
+	ret = isi_formats_init(isi);
+	if (ret) {
+		dev_err(isi->dev, "No supported mediabus format found\n");
+		return ret;
+	}
+	isi_camera_set_bus_param(isi);
+
+	ret = isi_set_default_fmt(isi);
+	if (ret) {
+		dev_err(isi->dev, "Could not set default format\n");
+		return ret;
+	}
+
+	ret = video_register_device(isi->vdev, VFL_TYPE_GRABBER, -1);
+	if (ret) {
+		dev_err(isi->dev, "Failed to register video device\n");
+		return ret;
+	}
+
+	dev_info(isi->dev, "Device registered as %s\n",
+		 video_device_node_name(isi->vdev));
+	return 0;
+}
+
+static void isi_graph_notify_unbind(struct v4l2_async_notifier *notifier,
+				     struct v4l2_subdev *sd,
+				     struct v4l2_async_subdev *asd)
+{
+	struct atmel_isi *isi = notifier_to_isi(notifier);
+
+	dev_info(isi->dev, "Removing %s\n",
+		 video_device_node_name(isi->vdev));
+
+	/* Checks internaly if vdev have been init or not */
+	video_unregister_device(isi->vdev);
+	if (isi->entity.config)
+		v4l2_subdev_free_pad_config(isi->entity.config);
+}
+
+static int isi_graph_notify_bound(struct v4l2_async_notifier *notifier,
+				   struct v4l2_subdev *subdev,
+				   struct v4l2_async_subdev *asd)
+{
+	struct atmel_isi *isi = notifier_to_isi(notifier);
+
+	dev_dbg(isi->dev, "subdev %s bound\n", subdev->name);
+
+	isi->entity.entity = &subdev->entity;
+	isi->entity.subdev = subdev;
+
+	return 0;
+}
+
+static int isi_graph_parse(struct atmel_isi *isi,
+			    struct device_node *node)
+{
+	struct device_node *remote;
+	struct device_node *ep = NULL;
+	struct device_node *next;
+	int ret = 0;
+
+	while (1) {
+		next = of_graph_get_next_endpoint(node, ep);
+		if (!next)
+			break;
+
+		of_node_put(ep);
+		ep = next;
+
+		remote = of_graph_get_remote_port_parent(ep);
+		if (!remote) {
+			ret = -EINVAL;
+			break;
+		}
+
+		/* Skip entities that we have already processed. */
+		if (remote == isi->dev->of_node) {
+			of_node_put(remote);
+			continue;
+		}
+
+		/* Remote node to connect */
+		if (!isi->entity.node) {
+			isi->entity.node = remote;
+			isi->entity.asd.match_type = V4L2_ASYNC_MATCH_OF;
+			isi->entity.asd.match.of.node = remote;
+			ret++;
+		}
+	}
+
+	of_node_put(ep);
+
+	return ret;
+}
+
+static int isi_graph_init(struct atmel_isi *isi)
+{
+	struct v4l2_async_subdev **subdevs = NULL;
+	int ret;
+
+	/* Parse the graph to extract a list of subdevice DT nodes. */
+	ret = isi_graph_parse(isi, isi->dev->of_node);
+	if (ret < 0) {
+		dev_err(isi->dev, "Graph parsing failed\n");
+		goto done;
+	}
+
+	if (!ret) {
+		dev_err(isi->dev, "No subdev found in graph\n");
+		goto done;
+	}
+
+	if (ret != 1) {
+		dev_err(isi->dev, "More then one subdev found in graph\n");
+		goto done;
+	}
+
+	/* Register the subdevices notifier. */
+	subdevs = devm_kzalloc(isi->dev, sizeof(*subdevs), GFP_KERNEL);
+	if (subdevs == NULL) {
+		ret = -ENOMEM;
+		goto done;
+	}
+
+	subdevs[0] = &isi->entity.asd;
+
+	isi->notifier.subdevs = subdevs;
+	isi->notifier.num_subdevs = 1;
+	isi->notifier.bound = isi_graph_notify_bound;
+	isi->notifier.unbind = isi_graph_notify_unbind;
+	isi->notifier.complete = isi_graph_notify_complete;
+
+	ret = v4l2_async_notifier_register(&isi->v4l2_dev, &isi->notifier);
+	if (ret < 0) {
+		dev_err(isi->dev, "Notifier registration failed\n");
+		goto done;
+	}
+
+	ret = 0;
+
+done:
+	if (ret < 0) {
+		v4l2_async_notifier_unregister(&isi->notifier);
+		of_node_put(isi->entity.node);
+	}
+
+	return ret;
+}
+
+
 static int atmel_isi_probe(struct platform_device *pdev)
 {
 	int irq;
 	struct atmel_isi *isi;
+	struct vb2_queue *q;
 	struct resource *regs;
 	int ret, i;
-	struct soc_camera_host *soc_host;
 
 	isi = devm_kzalloc(&pdev->dev, sizeof(struct atmel_isi), GFP_KERNEL);
 	if (!isi) {
@@ -1044,20 +1216,65 @@ static int atmel_isi_probe(struct platform_device *pdev)
 		return ret;
 
 	isi->active = NULL;
-	spin_lock_init(&isi->lock);
+	isi->dev = &pdev->dev;
+	mutex_init(&isi->lock);
+	spin_lock_init(&isi->irqlock);
 	INIT_LIST_HEAD(&isi->video_buffer_list);
 	INIT_LIST_HEAD(&isi->dma_desc_head);
 
+	q = &isi->queue;
+
+	/* Initialize the top-level structure */
+	ret = v4l2_device_register(&pdev->dev, &isi->v4l2_dev);
+	if (ret)
+		return ret;
+
+	isi->vdev = video_device_alloc();
+	if (isi->vdev == NULL) {
+		ret = -ENOMEM;
+		goto err_vdev_alloc;
+	}
+
+	/* video node */
+	isi->vdev->fops = &isi_fops;
+	isi->vdev->v4l2_dev = &isi->v4l2_dev;
+	isi->vdev->queue = &isi->queue;
+	strlcpy(isi->vdev->name, KBUILD_MODNAME, sizeof(isi->vdev->name));
+	isi->vdev->release = video_device_release;
+	isi->vdev->ioctl_ops = &isi_ioctl_ops;
+	isi->vdev->lock = &isi->lock;
+	isi->vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING |
+		V4L2_CAP_READWRITE;
+	video_set_drvdata(isi->vdev, isi);
+
+	/* buffer queue */
+	q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	q->io_modes = VB2_MMAP | VB2_READ | VB2_DMABUF;
+	q->lock = &isi->lock;
+	q->drv_priv = isi;
+	q->buf_struct_size = sizeof(struct frame_buffer);
+	q->ops = &isi_video_qops;
+	q->mem_ops = &vb2_dma_contig_memops;
+	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+	q->min_buffers_needed = 2;
+	q->dev = &pdev->dev;
+
+	ret = vb2_queue_init(q);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "failed to initialize VB2 queue\n");
+		goto err_vb2_queue;
+	}
 	isi->p_fb_descriptors = dma_alloc_coherent(&pdev->dev,
-				sizeof(struct fbd) * MAX_BUFFER_NUM,
+				sizeof(struct fbd) * VIDEO_MAX_FRAME,
 				&isi->fb_descriptors_phys,
 				GFP_KERNEL);
 	if (!isi->p_fb_descriptors) {
 		dev_err(&pdev->dev, "Can't allocate descriptors!\n");
-		return -ENOMEM;
+		ret = -ENOMEM;
+		goto err_dma_alloc;
 	}
 
-	for (i = 0; i < MAX_BUFFER_NUM; i++) {
+	for (i = 0; i < VIDEO_MAX_FRAME; i++) {
 		isi->dma_desc[i].p_fbd = isi->p_fb_descriptors + i;
 		isi->dma_desc[i].fbd_phys = isi->fb_descriptors_phys +
 					i * sizeof(struct fbd);
@@ -1089,41 +1306,49 @@ static int atmel_isi_probe(struct platform_device *pdev)
 	}
 	isi->irq = irq;
 
-	soc_host		= &isi->soc_host;
-	soc_host->drv_name	= "isi-camera";
-	soc_host->ops		= &isi_soc_camera_host_ops;
-	soc_host->priv		= isi;
-	soc_host->v4l2_dev.dev	= &pdev->dev;
-	soc_host->nr		= pdev->id;
+	ret = isi_graph_init(isi);
+	if (ret < 0)
+		goto err_req_irq;
 
 	pm_suspend_ignore_children(&pdev->dev, true);
 	pm_runtime_enable(&pdev->dev);
-
-	ret = soc_camera_host_register(soc_host);
-	if (ret) {
-		dev_err(&pdev->dev, "Unable to register soc camera host\n");
-		goto err_register_soc_camera_host;
-	}
+	platform_set_drvdata(pdev, isi);
 	return 0;
 
-err_register_soc_camera_host:
-	pm_runtime_disable(&pdev->dev);
 err_req_irq:
 err_ioremap:
 	dma_free_coherent(&pdev->dev,
-			sizeof(struct fbd) * MAX_BUFFER_NUM,
+			sizeof(struct fbd) * VIDEO_MAX_FRAME,
 			isi->p_fb_descriptors,
 			isi->fb_descriptors_phys);
+err_dma_alloc:
+err_vb2_queue:
+	video_device_release(isi->vdev);
+err_vdev_alloc:
+	v4l2_device_unregister(&isi->v4l2_dev);
 
 	return ret;
 }
 
+static int atmel_isi_remove(struct platform_device *pdev)
+{
+	struct atmel_isi *isi = platform_get_drvdata(pdev);
+
+	dma_free_coherent(&pdev->dev,
+			sizeof(struct fbd) * VIDEO_MAX_FRAME,
+			isi->p_fb_descriptors,
+			isi->fb_descriptors_phys);
+	pm_runtime_disable(&pdev->dev);
+	v4l2_async_notifier_unregister(&isi->notifier);
+	v4l2_device_unregister(&isi->v4l2_dev);
+
+	return 0;
+}
+
 #ifdef CONFIG_PM
 static int atmel_isi_runtime_suspend(struct device *dev)
 {
-	struct soc_camera_host *soc_host = to_soc_camera_host(dev);
-	struct atmel_isi *isi = container_of(soc_host,
-					struct atmel_isi, soc_host);
+	struct atmel_isi *isi = dev_get_drvdata(dev);
 
 	clk_disable_unprepare(isi->pclk);
 
@@ -1131,9 +1356,7 @@ static int atmel_isi_runtime_suspend(struct device *dev)
 }
 static int atmel_isi_runtime_resume(struct device *dev)
 {
-	struct soc_camera_host *soc_host = to_soc_camera_host(dev);
-	struct atmel_isi *isi = container_of(soc_host,
-					struct atmel_isi, soc_host);
+	struct atmel_isi *isi = dev_get_drvdata(dev);
 
 	return clk_prepare_enable(isi->pclk);
 }
@@ -1151,15 +1374,16 @@ static const struct of_device_id atmel_isi_of_match[] = {
 MODULE_DEVICE_TABLE(of, atmel_isi_of_match);
 
 static struct platform_driver atmel_isi_driver = {
-	.remove		= atmel_isi_remove,
 	.driver		= {
 		.name = "atmel_isi",
 		.of_match_table = of_match_ptr(atmel_isi_of_match),
 		.pm	= &atmel_isi_dev_pm_ops,
 	},
+	.probe		= atmel_isi_probe,
+	.remove		= atmel_isi_remove,
 };
 
-module_platform_driver_probe(atmel_isi_driver, atmel_isi_probe);
+module_platform_driver(atmel_isi_driver);
 
 MODULE_AUTHOR("Josh Wu <josh.wu@atmel.com>");
 MODULE_DESCRIPTION("The V4L2 driver for Atmel Linux");
-- 
2.8.1

[RFC PATCH 7/7] sama5d3 dts: enable atmel-isi

[Hans Verkuil]

From: Hans Verkuil <hans.verkuil@cisco.com>

This illustrates the changes needed to the dts in order to hook up the
ov7670. I don't plan on merging this.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
---
 arch/arm/boot/dts/at91-sama5d3_xplained.dts | 61 ++++++++++++++++++++++++++---
 arch/arm/boot/dts/sama5d3.dtsi              |  4 +-
 2 files changed, 58 insertions(+), 7 deletions(-)

diff --git a/arch/arm/boot/dts/at91-sama5d3_xplained.dts b/arch/arm/boot/dts/at91-sama5d3_xplained.dts
index c51fc65..ac7f7f3 100644
--- a/arch/arm/boot/dts/at91-sama5d3_xplained.dts
+++ b/arch/arm/boot/dts/at91-sama5d3_xplained.dts
@@ -65,18 +65,53 @@
 				status = "okay";
 			};
 
+			isi0: isi@f0034000 {
+				status = "okay";
+				port {
+					#address-cells = <1>;
+					#size-cells = <0>;
+					isi_0: endpoint {
+						reg = <0>;
+						remote-endpoint = <&ov7670_0>;
+						bus-width = <8>;
+						vsync-active = <1>;
+						hsync-active = <1>;
+					};
+				};
+			};
+
 			i2c0: i2c@f0014000 {
 				pinctrl-0 = <&pinctrl_i2c0_pu>;
-				status = "okay";
+				status = "disabled";
 			};
 
 			i2c1: i2c@f0018000 {
 				status = "okay";
 
+				ov7670: camera@0x21 {
+					compatible = "ovti,ov7670";
+					reg = <0x21>;
+					pinctrl-names = "default";
+					pinctrl-0 = <&pinctrl_pck0_as_isi_mck &pinctrl_sensor_power &pinctrl_sensor_reset>;
+					resetb-gpios = <&pioE 11 GPIO_ACTIVE_LOW>;
+					pwdn-gpios = <&pioE 13 GPIO_ACTIVE_HIGH>;
+					clocks = <&pck0>;
+					clock-names = "xvclk";
+					assigned-clocks = <&pck0>;
+					assigned-clock-rates = <24000000>;
+
+					port {
+						ov7670_0: endpoint {
+							remote-endpoint = <&isi_0>;
+							bus-width = <8>;
+						};
+					};
+				};
+
 				pmic: act8865@5b {
 					compatible = "active-semi,act8865";
 					reg = <0x5b>;
-					status = "disabled";
+					status = "okay";
 
 					regulators {
 						vcc_1v8_reg: DCDC_REG1 {
@@ -130,7 +165,7 @@
 			pwm0: pwm@f002c000 {
 				pinctrl-names = "default";
 				pinctrl-0 = <&pinctrl_pwm0_pwmh0_0 &pinctrl_pwm0_pwmh1_0>;
-				status = "okay";
+				status = "disabled";
 			};
 
 			usart0: serial@f001c000 {
@@ -143,7 +178,7 @@
 			};
 
 			uart0: serial@f0024000 {
-				status = "okay";
+				status = "disabled";
 			};
 
 			mmc1: mmc@f8000000 {
@@ -181,7 +216,7 @@
 			i2c2: i2c@f801c000 {
 				dmas = <0>, <0>;	/* Do not use DMA for i2c2 */
 				pinctrl-0 = <&pinctrl_i2c2_pu>;
-				status = "okay";
+				status = "disabled";
 			};
 
 			macb1: ethernet@f802c000 {
@@ -200,6 +235,22 @@
 			};
 
 			pinctrl@fffff200 {
+				camera_sensor {
+					pinctrl_pck0_as_isi_mck: pck0_as_isi_mck-0 {
+						atmel,pins =
+							<AT91_PIOD 30 AT91_PERIPH_B AT91_PINCTRL_NONE>;	/* ISI_MCK */
+					};
+
+					pinctrl_sensor_power: sensor_power-0 {
+						atmel,pins =
+							<AT91_PIOE 13 AT91_PERIPH_GPIO AT91_PINCTRL_NONE>;
+					};
+
+					pinctrl_sensor_reset: sensor_reset-0 {
+						atmel,pins =
+							<AT91_PIOE 11 AT91_PERIPH_GPIO AT91_PINCTRL_NONE>;
+					};
+				};
 				board {
 					pinctrl_i2c0_pu: i2c0_pu {
 						atmel,pins =
diff --git a/arch/arm/boot/dts/sama5d3.dtsi b/arch/arm/boot/dts/sama5d3.dtsi
index 4c84d33..a4afa84 100644
--- a/arch/arm/boot/dts/sama5d3.dtsi
+++ b/arch/arm/boot/dts/sama5d3.dtsi
@@ -176,7 +176,7 @@
 				#address-cells = <1>;
 				#size-cells = <0>;
 				clocks = <&twi1_clk>;
-				status = "disabled";
+				status = "ok";
 			};
 
 			usart0: serial@f001c000 {
@@ -235,7 +235,7 @@
 				pinctrl-0 = <&pinctrl_isi_data_0_7>;
 				clocks = <&isi_clk>;
 				clock-names = "isi_clk";
-				status = "disabled";
+				status = "ok";
 				port {
 					#address-cells = <1>;
 					#size-cells = <0>;
-- 
2.8.1

Re: [RFC PATCH 1/7] ov7670: add media controller support

[Laurent Pinchart]

Hi Hans,

Thank you for the patch.

On Wednesday 17 Aug 2016 08:29:37 Hans Verkuil wrote:
> From: Hans Verkuil <hans.verkuil@cisco.com>
> 
> Add media controller support.
> 
> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
> ---
>  drivers/media/i2c/ov7670.c | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)
> 
> diff --git a/drivers/media/i2c/ov7670.c b/drivers/media/i2c/ov7670.c
> index 56cfb5c..25f46c7 100644
> --- a/drivers/media/i2c/ov7670.c
> +++ b/drivers/media/i2c/ov7670.c
> @@ -210,6 +210,7 @@ struct ov7670_devtype {
>  struct ov7670_format_struct;  /* coming later */
>  struct ov7670_info {
>  	struct v4l2_subdev sd;
> +	struct media_pad pad;

You could guard this with #if defined(CONFIG_MEDIA_CONTROLLER) as well. I'm 
wondering, however, whether we shouldn't start making CONFIG_MEDIA_CONTROLLER 
mandatory for I2C sensors.

>  	struct v4l2_ctrl_handler hdl;
>  	struct {
>  		/* gain cluster */
> @@ -1641,6 +1642,16 @@ static int ov7670_probe(struct i2c_client *client,
>  		v4l2_ctrl_handler_free(&info->hdl);
>  		return err;
>  	}
> +
> +#if defined(CONFIG_MEDIA_CONTROLLER)
> +	info->pad.flags = MEDIA_PAD_FL_SOURCE;
> +	info->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
> +	ret = media_entity_pads_init(&info->sd.entity, 1, &info->pad);
> +	if (ret < 0) {
> +		v4l2_ctrl_handler_free(&info->hdl);
> +		return ret;
> +	}
> +#endif
>  	/*
>  	 * We have checked empirically that hw allows to read back the gain
>  	 * value chosen by auto gain but that's not the case for auto 
exposure.
> @@ -1662,6 +1673,9 @@ static int ov7670_remove(struct i2c_client *client)
> 
>  	v4l2_device_unregister_subdev(sd);
>  	v4l2_ctrl_handler_free(&info->hdl);
> +#if defined(CONFIG_MEDIA_CONTROLLER)
> +	media_entity_cleanup(&sd->entity);
> +#endif
>  	return 0;
>  }

-- 
Regards,

Laurent Pinchart

Re: [RFC PATCH 2/7] ov7670: call v4l2_async_register_subdev

[Laurent Pinchart]

Hi Hans,

Thank you for the patch.

On Wednesday 17 Aug 2016 08:29:38 Hans Verkuil wrote:
> From: Hans Verkuil <hans.verkuil@cisco.com>
> 
> Add v4l2-async support for this driver.
> 
> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
> ---
>  drivers/media/i2c/ov7670.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/drivers/media/i2c/ov7670.c b/drivers/media/i2c/ov7670.c
> index 25f46c7..26ad1a2 100644
> --- a/drivers/media/i2c/ov7670.c
> +++ b/drivers/media/i2c/ov7670.c
> @@ -1662,6 +1662,14 @@ static int ov7670_probe(struct i2c_client *client,
>  	v4l2_ctrl_cluster(2, &info->saturation);
>  	v4l2_ctrl_handler_setup(&info->hdl);
> 
> +	ret = v4l2_async_register_subdev(&info->sd);
> +	if (ret < 0) {
> +#if defined(CONFIG_MEDIA_CONTROLLER)
> +		media_entity_cleanup(&info->sd.entity);
> +#endif

Don't you need to also call v4l2_ctrl_handler_free() ?

> +		return ret;
> +	}
> +
>  	return 0;
>  }

-- 
Regards,

Laurent Pinchart

Re: [RFC PATCH 4/7] ov7670: get xvclk

[Laurent Pinchart]

Hi Hans,

Thank you for the patch.

On Wednesday 17 Aug 2016 08:29:40 Hans Verkuil wrote:
> From: Hans Verkuil <hans.verkuil@cisco.com>
> 
> Get the clock for this sensor.
> 
> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
> ---
>  drivers/media/i2c/ov7670.c | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
> 
> diff --git a/drivers/media/i2c/ov7670.c b/drivers/media/i2c/ov7670.c
> index fe527b2..57adf3d 100644
> --- a/drivers/media/i2c/ov7670.c
> +++ b/drivers/media/i2c/ov7670.c
> @@ -10,6 +10,7 @@
>   * This file may be distributed under the terms of the GNU General
>   * Public License, version 2.
>   */
> +#include <linux/clk.h>
>  #include <linux/init.h>
>  #include <linux/module.h>
>  #include <linux/slab.h>
> @@ -18,6 +19,7 @@
>  #include <linux/videodev2.h>
>  #include <media/v4l2-device.h>
>  #include <media/v4l2-ctrls.h>
> +#include <media/v4l2-clk.h>
>  #include <media/v4l2-mediabus.h>
>  #include <media/v4l2-image-sizes.h>
>  #include <media/i2c/ov7670.h>
> @@ -228,6 +230,7 @@ struct ov7670_info {
>  		struct v4l2_ctrl *hue;
>  	};
>  	struct ov7670_format_struct *fmt;  /* Current format */
> +	struct v4l2_clk *clk;
>  	int min_width;			/* Filter out smaller sizes */
>  	int min_height;			/* Filter out smaller sizes */
>  	int clock_speed;		/* External clock speed (MHz) */
> @@ -1588,8 +1591,19 @@ static int ov7670_probe(struct i2c_client *client,
>  			info->pclk_hb_disable = true;
>  	}
> 
> +	info->clk = v4l2_clk_get(&client->dev, "xvclk");
> +	if (IS_ERR(info->clk))
> +		return -EPROBE_DEFER;
> +	v4l2_clk_enable(info->clk);

Do you really need the V4L2 clock API here, or could you use the CCF API 
directly ?

> +	info->clock_speed = v4l2_clk_get_rate(info->clk) / 1000000;
> +	if (info->clock_speed < 12 ||
> +	    info->clock_speed > 48)
> +		return -EINVAL;
> +

You need error handling here too. I recommend adding error handling code at 
the end of the function and using goto's.

>  	/* Make sure it's an ov7670 */
>  	ret = ov7670_detect(sd);
> +

No need for a blank line here.

>  	if (ret) {
>  		v4l_dbg(1, debug, client,
>  			"chip found @ 0x%x (%s) is not an ov7670 chip.\n",
> @@ -1682,6 +1696,7 @@ static int ov7670_remove(struct i2c_client *client)
>  #if defined(CONFIG_MEDIA_CONTROLLER)
>  	media_entity_cleanup(&sd->entity);
>  #endif
> +	v4l2_clk_put(info->clk);

Don't you need to call v4l2_clk_disable() before ?

>  	return 0;
>  }

-- 
Regards,

Laurent Pinchart

Re: [RFC PATCH 5/7] ov7670: add devicetree support

[Laurent Pinchart]

Hi Hans,

Thank you for the patch.

On Wednesday 17 Aug 2016 08:29:41 Hans Verkuil wrote:
> From: Hans Verkuil <hans.verkuil@cisco.com>
> 
> Add DT support. Use it to get the reset and pwdn pins (if there are any).
> Tested with one sensor requiring reset/pwdn and one sensor that doesn't
> have reset/pwdn pins.
> 
> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
> ---
>  .../devicetree/bindings/media/i2c/ov7670.txt       | 44 +++++++++++++++++
>  MAINTAINERS                                        |  1 +
>  drivers/media/i2c/ov7670.c                         | 51 +++++++++++++++++++
>  3 files changed, 96 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/media/i2c/ov7670.txt
> 
> diff --git a/Documentation/devicetree/bindings/media/i2c/ov7670.txt
> b/Documentation/devicetree/bindings/media/i2c/ov7670.txt new file mode
> 100644
> index 0000000..3231c47
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/i2c/ov7670.txt
> @@ -0,0 +1,44 @@
> +* Omnivision OV7670 CMOS sensor
> +
> +The Omnivision OV7670 sensor support multiple resolutions output, such as

s/support/supports/

> +CIF, SVGA, UXGA. It also can support YUV422/420, RGB565/555 or raw RGB
> +output format.

s/format/formats/ (and possibly s/can support/can support the/)

> +
> +Required Properties:
> +- compatible: should be "ovti,ov7670"
> +- clocks: reference to the xvclk input clock.
> +- clock-names: should be "xvclk".
> +
> +Optional Properties:
> +- resetb-gpios: reference to the GPIO connected to the resetb pin, if any.
> +- pwdn-gpios: reference to the GPIO connected to the pwdn pin, if any.
> +
> +The device node must contain one 'port' child node for its digital output
> +video port, in accordance with the video interface bindings defined in
> +Documentation/devicetree/bindings/media/video-interfaces.txt.
> +
> +Example:
> +
> +	i2c1: i2c@f0018000 {
> +		status = "okay";
> +
> +		ov7670: camera@0x21 {
> +			compatible = "ovti,ov7670";
> +			reg = <0x21>;
> +			pinctrl-names = "default";
> +			pinctrl-0 = <&pinctrl_pck0_as_isi_mck
> &pinctrl_sensor_power
> &pinctrl_sensor_reset>;

The pinctrl properties should be part of the clock provider DT node.

> +			resetb-gpios = <&pioE 11 GPIO_ACTIVE_LOW>;
> +			pwdn-gpios = <&pioE 13 GPIO_ACTIVE_HIGH>;
> +			clocks = <&pck0>;
> +			clock-names = "xvclk";
> +			assigned-clocks = <&pck0>;
> +			assigned-clock-rates = <24000000>;

You should compute and set the clock rate dynamically in the driver, not 
hardcode it in DT.

> +			port {
> +				ov7670_0: endpoint {
> +					remote-endpoint = <&isi_0>;
> +					bus-width = <8>;
> +				};
> +			};
> +		};
> +	};
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 20bb1d0..1fec3a6 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -8615,6 +8615,7 @@ L:	linux-media@vger.kernel.org
>  T:	git git://linuxtv.org/media_tree.git
>  S:	Maintained
>  F:	drivers/media/i2c/ov7670.c
> +F:	Documentation/devicetree/bindings/media/i2c/ov7670.txt
> 
>  ONENAND FLASH DRIVER
>  M:	Kyungmin Park <kyungmin.park@samsung.com>
> diff --git a/drivers/media/i2c/ov7670.c b/drivers/media/i2c/ov7670.c
> index 57adf3d..a401b99 100644
> --- a/drivers/media/i2c/ov7670.c
> +++ b/drivers/media/i2c/ov7670.c
> @@ -17,6 +17,9 @@
>  #include <linux/i2c.h>
>  #include <linux/delay.h>
>  #include <linux/videodev2.h>
> +#include <linux/gpio.h>
> +#include <linux/gpio/consumer.h>
> +#include <linux/of_gpio.h>

I don't think you need of_gpio.h.

>  #include <media/v4l2-device.h>
>  #include <media/v4l2-ctrls.h>
>  #include <media/v4l2-clk.h>
> @@ -231,6 +234,8 @@ struct ov7670_info {
>  	};
>  	struct ov7670_format_struct *fmt;  /* Current format */
>  	struct v4l2_clk *clk;
> +	struct gpio_desc *resetb_gpio;
> +	struct gpio_desc *pwdn_gpio;
>  	int min_width;			/* Filter out smaller sizes */
>  	int min_height;			/* Filter out smaller sizes */
>  	int clock_speed;		/* External clock speed (MHz) */
> @@ -1551,6 +1556,40 @@ static const struct ov7670_devtype ov7670_devdata[] =
> { },
>  };
> 
> +static int ov7670_probe_dt(struct i2c_client *client,

The function doesn't actually depend on DT, how about calling it 
ov7670_init_gpio() or something similar ?

> +		struct ov7670_info *info)
> +{
> +	/* Request the reset GPIO deasserted */
> +	info->resetb_gpio = devm_gpiod_get_optional(&client->dev, "resetb",
> +			GPIOD_OUT_LOW);
> +	if (!info->resetb_gpio)
> +		dev_dbg(&client->dev, "resetb gpio is not assigned!\n");

I don't think the debug message is really worth it, but that's up to you.

> +	else if (IS_ERR(info->resetb_gpio)) {
> +		dev_info(&client->dev, "no resetb\n");

If you write this "no %s\n", "resetb" and do the same for the "no pwdn\n" 
string below you will save a bit of memory as all strings will be shared. I 
would also write it as "can't get %s GPIO\n" (or something similar), the "no 
%s\n" message seems a bit confusing to me.

> +		return PTR_ERR(info->resetb_gpio);
> +	}
> +
> +	/* Request the power down GPIO asserted */
> +	info->pwdn_gpio = devm_gpiod_get_optional(&client->dev, "pwdn",
> +			GPIOD_OUT_LOW);
> +	if (!info->pwdn_gpio)
> +		dev_dbg(&client->dev, "pwdn gpio is not assigned!\n");
> +	else if (IS_ERR(info->pwdn_gpio)) {
> +		dev_info(&client->dev, "no pwdn\n");
> +		return PTR_ERR(info->pwdn_gpio);
> +	}
> +
> +	if (info->resetb_gpio) {
> +		/* Active the resetb pin to perform a reset pulse */
> +		gpiod_direction_output(info->resetb_gpio, 1);
> +		usleep_range(3000, 5000);
> +		gpiod_direction_output(info->resetb_gpio, 0);
> +	}
> +	usleep_range(3000, 5000);

Do you need to sleep if you can't reset the sensor ?

> +
> +	return 0;
> +}
> +
>  static int ov7670_probe(struct i2c_client *client,
>  			const struct i2c_device_id *id)
>  {
> @@ -1596,6 +1635,10 @@ static int ov7670_probe(struct i2c_client *client,
>  		return -EPROBE_DEFER;
>  	v4l2_clk_enable(info->clk);
> 
> +	ret = ov7670_probe_dt(client, info);
> +	if (ret)
> +		return ret;
> +
>  	info->clock_speed = v4l2_clk_get_rate(info->clk) / 1000000;
>  	if (info->clock_speed < 12 ||
>  	    info->clock_speed > 48)
> @@ -1707,6 +1750,14 @@ static const struct i2c_device_id ov7670_id[] = {
>  };
>  MODULE_DEVICE_TABLE(i2c, ov7670_id);
> 
> +#if IS_ENABLED(CONFIG_OF)
> +static const struct of_device_id ov7670_of_match[] = {
> +	{ .compatible = "ovti,ov7670", },
> +	{ /* sentinel */ },
> +};
> +MODULE_DEVICE_TABLE(of, ov7670_of_match);
> +#endif
> +
>  static struct i2c_driver ov7670_driver = {
>  	.driver = {
>  		.name	= "ov7670",

Shouldn't you set .of_match_table() here ?

-- 
Regards,

Laurent Pinchart

Re: [RFC PATCH 6/7] atmel-isi: remove dependency of the soc-camera framework

[Wu, Songjun]

Hi Hans,

Thank you for the patch.

On 8/17/2016 14:29, Hans Verkuil wrote:
> From: Hans Verkuil <hans.verkuil@cisco.com>
>
> This patch converts the atmel-isi driver from a soc-camera driver to a driver
> that is stand-alone.
>
> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
> ---
>  drivers/media/platform/soc_camera/Kconfig     |    3 +-
>  drivers/media/platform/soc_camera/atmel-isi.c | 1216 +++++++++++++++----------
>  2 files changed, 721 insertions(+), 498 deletions(-)
>
> diff --git a/drivers/media/platform/soc_camera/Kconfig b/drivers/media/platform/soc_camera/Kconfig
> index 39f6641..f74e358 100644
> --- a/drivers/media/platform/soc_camera/Kconfig
> +++ b/drivers/media/platform/soc_camera/Kconfig
> @@ -54,9 +54,8 @@ config VIDEO_SH_MOBILE_CEU
>
>  config VIDEO_ATMEL_ISI
>  	tristate "ATMEL Image Sensor Interface (ISI) support"
> -	depends on VIDEO_DEV && SOC_CAMERA
> +	depends on VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API && OF && HAS_DMA
>  	depends on ARCH_AT91 || COMPILE_TEST
> -	depends on HAS_DMA
>  	select VIDEOBUF2_DMA_CONTIG
>  	---help---
>  	  This module makes the ATMEL Image Sensor Interface available
> diff --git a/drivers/media/platform/soc_camera/atmel-isi.c b/drivers/media/platform/soc_camera/atmel-isi.c
> index 30211f6..9947acb 100644
> --- a/drivers/media/platform/soc_camera/atmel-isi.c
> +++ b/drivers/media/platform/soc_camera/atmel-isi.c
> @@ -22,18 +22,22 @@

<snip>

>
> @@ -305,26 +292,21 @@ static int queue_setup(struct vb2_queue *vq,
>  				unsigned int *nbuffers, unsigned int *nplanes,
>  				unsigned int sizes[], struct device *alloc_devs[])
>  {
> -	struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
> -	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
> -	struct atmel_isi *isi = ici->priv;
> +	struct atmel_isi *isi = vq->drv_priv;
It's better to use vb2_get_drv_priv.
struct atmel_isi *isi = vb2_get_drv_priv(vq);

>  	unsigned long size;
>
> -	size = icd->sizeimage;
> +	size = isi->fmt.fmt.pix.sizeimage;
>
> -	if (!*nbuffers || *nbuffers > MAX_BUFFER_NUM)
> -		*nbuffers = MAX_BUFFER_NUM;
> -
> -	if (size * *nbuffers > VID_LIMIT_BYTES)
> -		*nbuffers = VID_LIMIT_BYTES / size;
> +	/* Make sure the image size is large enough. */
> +	if (*nplanes)
> +		return sizes[0] < size ? -EINVAL : 0;
>
>  	*nplanes = 1;
>  	sizes[0] = size;
>
> -	isi->sequence = 0;
>  	isi->active = NULL;
>
> -	dev_dbg(icd->parent, "%s, count=%d, size=%ld\n", __func__,
> +	dev_dbg(isi->dev, "%s, count=%d, size=%ld\n", __func__,
>  		*nbuffers, size);
>
>  	return 0;

<snip>

>
> +static int isi_open(struct file *file)
> +{
> +	struct atmel_isi *isi = video_drvdata(file);
> +	struct v4l2_subdev *sd = isi->entity.subdev;
> +	int ret;
> +
> +	if (mutex_lock_interruptible(&isi->lock))
> +		return -ERESTARTSYS;
> +
> +	ret = v4l2_fh_open(file);
> +	if (ret < 0)
> +		goto unlock;
> +
> +	if (!v4l2_fh_is_singular_file(file))
> +		goto unlock;
> +
> +	ret = v4l2_subdev_call(sd, core, s_power, 1);
> +	if (ret < 0 && ret != -ENOIOCTLCMD)
> +		goto unlock;
v4l2_fh_release should be called on error;

> +
> +	ret = isi_set_fmt(isi, &isi->fmt);
> +	if (ret)
> +		v4l2_subdev_call(sd, core, s_power, 0);
> +unlock:
> +	mutex_unlock(&isi->lock);
> +	return ret;
> +}
> +

<snip>

> +
> +static int isi_graph_notify_complete(struct v4l2_async_notifier *notifier)
> +{
> +	struct atmel_isi *isi = notifier_to_isi(notifier);
> +	int ret;
> +
> +	ret = v4l2_device_register_subdev_nodes(&isi->v4l2_dev);
> +	if (ret < 0) {
> +		dev_err(isi->dev, "Failed to register subdev nodes\n");
> +		return ret;
> +	}
> +
> +	isi->vdev->ctrl_handler	= isi->entity.subdev->ctrl_handler;
> +	isi->entity.config = v4l2_subdev_alloc_pad_config(isi->entity.subdev);
isi->entity.config maybe assigned to 'NULL'. It's better to add code to 
judge its value.

> +	ret = isi_formats_init(isi);
> +	if (ret) {
> +		dev_err(isi->dev, "No supported mediabus format found\n");
> +		return ret;
> +	}
> +	isi_camera_set_bus_param(isi);
> +
> +	ret = isi_set_default_fmt(isi);
> +	if (ret) {
> +		dev_err(isi->dev, "Could not set default format\n");
> +		return ret;
> +	}
> +
> +	ret = video_register_device(isi->vdev, VFL_TYPE_GRABBER, -1);
> +	if (ret) {
> +		dev_err(isi->dev, "Failed to register video device\n");
> +		return ret;
> +	}
> +
> +	dev_info(isi->dev, "Device registered as %s\n",
> +		 video_device_node_name(isi->vdev));
> +	return 0;
> +}
> +

<snip>

> +
>  static int atmel_isi_probe(struct platform_device *pdev)
>  {
>  	int irq;
>  	struct atmel_isi *isi;
> +	struct vb2_queue *q;
>  	struct resource *regs;
>  	int ret, i;
> -	struct soc_camera_host *soc_host;
>
>  	isi = devm_kzalloc(&pdev->dev, sizeof(struct atmel_isi), GFP_KERNEL);
>  	if (!isi) {
> @@ -1044,20 +1216,65 @@ static int atmel_isi_probe(struct platform_device *pdev)
>  		return ret;
>
>  	isi->active = NULL;
> -	spin_lock_init(&isi->lock);
> +	isi->dev = &pdev->dev;
> +	mutex_init(&isi->lock);
> +	spin_lock_init(&isi->irqlock);
>  	INIT_LIST_HEAD(&isi->video_buffer_list);
>  	INIT_LIST_HEAD(&isi->dma_desc_head);
>
> +	q = &isi->queue;
> +
> +	/* Initialize the top-level structure */
> +	ret = v4l2_device_register(&pdev->dev, &isi->v4l2_dev);
> +	if (ret)
> +		return ret;
> +
> +	isi->vdev = video_device_alloc();
> +	if (isi->vdev == NULL) {
> +		ret = -ENOMEM;
> +		goto err_vdev_alloc;
> +	}
If video device is unregistered, the ISI driver must be reloaded when 
registering a new video device.
So '*vdev' can be replaced by 'vdev', or move the code above to 
isi_graph_notify_complete.

> +
> +	/* video node */
> +	isi->vdev->fops = &isi_fops;
> +	isi->vdev->v4l2_dev = &isi->v4l2_dev;
> +	isi->vdev->queue = &isi->queue;
> +	strlcpy(isi->vdev->name, KBUILD_MODNAME, sizeof(isi->vdev->name));
> +	isi->vdev->release = video_device_release;
> +	isi->vdev->ioctl_ops = &isi_ioctl_ops;
> +	isi->vdev->lock = &isi->lock;
> +	isi->vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING |
> +		V4L2_CAP_READWRITE;
> +	video_set_drvdata(isi->vdev, isi);
> +
> +	/* buffer queue */
> +	q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
> +	q->io_modes = VB2_MMAP | VB2_READ | VB2_DMABUF;
> +	q->lock = &isi->lock;
> +	q->drv_priv = isi;
> +	q->buf_struct_size = sizeof(struct frame_buffer);
> +	q->ops = &isi_video_qops;
> +	q->mem_ops = &vb2_dma_contig_memops;
> +	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
> +	q->min_buffers_needed = 2;
> +	q->dev = &pdev->dev;
> +
> +	ret = vb2_queue_init(q);
> +	if (ret < 0) {
> +		dev_err(&pdev->dev, "failed to initialize VB2 queue\n");
> +		goto err_vb2_queue;
> +	}

Regards,
	Songjun Wu

Re: [RFC PATCH 5/7] ov7670: add devicetree support

[Hans Verkuil]

Hi Laurent,

On 08/17/2016 02:44 PM, Laurent Pinchart wrote:
> Hi Hans,
> 
> Thank you for the patch.
> 
> On Wednesday 17 Aug 2016 08:29:41 Hans Verkuil wrote:
>> From: Hans Verkuil <hans.verkuil@cisco.com>
>>
>> Add DT support. Use it to get the reset and pwdn pins (if there are any).
>> Tested with one sensor requiring reset/pwdn and one sensor that doesn't
>> have reset/pwdn pins.
>>
>> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
>> ---
>>  .../devicetree/bindings/media/i2c/ov7670.txt       | 44 +++++++++++++++++
>>  MAINTAINERS                                        |  1 +
>>  drivers/media/i2c/ov7670.c                         | 51 +++++++++++++++++++
>>  3 files changed, 96 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/media/i2c/ov7670.txt
>>
>> diff --git a/Documentation/devicetree/bindings/media/i2c/ov7670.txt
>> b/Documentation/devicetree/bindings/media/i2c/ov7670.txt new file mode
>> 100644
>> index 0000000..3231c47
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/media/i2c/ov7670.txt
>> @@ -0,0 +1,44 @@
>> +* Omnivision OV7670 CMOS sensor
>> +
>> +The Omnivision OV7670 sensor support multiple resolutions output, such as
> 
> s/support/supports/
> 
>> +CIF, SVGA, UXGA. It also can support YUV422/420, RGB565/555 or raw RGB
>> +output format.
> 
> s/format/formats/ (and possibly s/can support/can support the/)
> 
>> +
>> +Required Properties:
>> +- compatible: should be "ovti,ov7670"
>> +- clocks: reference to the xvclk input clock.
>> +- clock-names: should be "xvclk".
>> +
>> +Optional Properties:
>> +- resetb-gpios: reference to the GPIO connected to the resetb pin, if any.
>> +- pwdn-gpios: reference to the GPIO connected to the pwdn pin, if any.
>> +
>> +The device node must contain one 'port' child node for its digital output
>> +video port, in accordance with the video interface bindings defined in
>> +Documentation/devicetree/bindings/media/video-interfaces.txt.
>> +
>> +Example:
>> +
>> +	i2c1: i2c@f0018000 {
>> +		status = "okay";
>> +
>> +		ov7670: camera@0x21 {
>> +			compatible = "ovti,ov7670";
>> +			reg = <0x21>;
>> +			pinctrl-names = "default";
>> +			pinctrl-0 = <&pinctrl_pck0_as_isi_mck
>> &pinctrl_sensor_power
>> &pinctrl_sensor_reset>;
> 
> The pinctrl properties should be part of the clock provider DT node.

Do you have examples of that?

I just copied this from existing atmel dts code (arch/arm/boot/dts/sama5d3xmb.dtsi).

> 
>> +			resetb-gpios = <&pioE 11 GPIO_ACTIVE_LOW>;
>> +			pwdn-gpios = <&pioE 13 GPIO_ACTIVE_HIGH>;
>> +			clocks = <&pck0>;
>> +			clock-names = "xvclk";
>> +			assigned-clocks = <&pck0>;
>> +			assigned-clock-rates = <24000000>;
> 
> You should compute and set the clock rate dynamically in the driver, not 
> hardcode it in DT.

Do you have an example of that? Again, I just copied this from the same sama5d3xmb.dtsi.

Regards,

	Hans

Re: [RFC PATCH 6/7] atmel-isi: remove dependency of the soc-camera framework

[Hans Verkuil]

On 08/18/2016 07:53 AM, Wu, Songjun wrote:
> Hi Hans,
> 
> Thank you for the patch.
> 
> On 8/17/2016 14:29, Hans Verkuil wrote:
>> From: Hans Verkuil <hans.verkuil@cisco.com>
>>
>> This patch converts the atmel-isi driver from a soc-camera driver to a driver
>> that is stand-alone.
>>
>> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
>> ---
>>  drivers/media/platform/soc_camera/Kconfig     |    3 +-
>>  drivers/media/platform/soc_camera/atmel-isi.c | 1216 +++++++++++++++----------
>>  2 files changed, 721 insertions(+), 498 deletions(-)
>>
>> diff --git a/drivers/media/platform/soc_camera/Kconfig b/drivers/media/platform/soc_camera/Kconfig
>> index 39f6641..f74e358 100644
>> --- a/drivers/media/platform/soc_camera/Kconfig
>> +++ b/drivers/media/platform/soc_camera/Kconfig
>> @@ -54,9 +54,8 @@ config VIDEO_SH_MOBILE_CEU
>>
>>  config VIDEO_ATMEL_ISI
>>  	tristate "ATMEL Image Sensor Interface (ISI) support"
>> -	depends on VIDEO_DEV && SOC_CAMERA
>> +	depends on VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API && OF && HAS_DMA
>>  	depends on ARCH_AT91 || COMPILE_TEST
>> -	depends on HAS_DMA
>>  	select VIDEOBUF2_DMA_CONTIG
>>  	---help---
>>  	  This module makes the ATMEL Image Sensor Interface available
>> diff --git a/drivers/media/platform/soc_camera/atmel-isi.c b/drivers/media/platform/soc_camera/atmel-isi.c
>> index 30211f6..9947acb 100644
>> --- a/drivers/media/platform/soc_camera/atmel-isi.c
>> +++ b/drivers/media/platform/soc_camera/atmel-isi.c


>> +
>>  static int atmel_isi_probe(struct platform_device *pdev)
>>  {
>>  	int irq;
>>  	struct atmel_isi *isi;
>> +	struct vb2_queue *q;
>>  	struct resource *regs;
>>  	int ret, i;
>> -	struct soc_camera_host *soc_host;
>>
>>  	isi = devm_kzalloc(&pdev->dev, sizeof(struct atmel_isi), GFP_KERNEL);
>>  	if (!isi) {
>> @@ -1044,20 +1216,65 @@ static int atmel_isi_probe(struct platform_device *pdev)
>>  		return ret;
>>
>>  	isi->active = NULL;
>> -	spin_lock_init(&isi->lock);
>> +	isi->dev = &pdev->dev;
>> +	mutex_init(&isi->lock);
>> +	spin_lock_init(&isi->irqlock);
>>  	INIT_LIST_HEAD(&isi->video_buffer_list);
>>  	INIT_LIST_HEAD(&isi->dma_desc_head);
>>
>> +	q = &isi->queue;
>> +
>> +	/* Initialize the top-level structure */
>> +	ret = v4l2_device_register(&pdev->dev, &isi->v4l2_dev);
>> +	if (ret)
>> +		return ret;
>> +
>> +	isi->vdev = video_device_alloc();
>> +	if (isi->vdev == NULL) {
>> +		ret = -ENOMEM;
>> +		goto err_vdev_alloc;
>> +	}
> If video device is unregistered, the ISI driver must be reloaded when 
> registering a new video device.
> So '*vdev' can be replaced by 'vdev', or move the code above to 
> isi_graph_notify_complete.

I'm afraid I don't understand what you mean. Can you clarify?

Regards,

	Hans

> 
>> +
>> +	/* video node */
>> +	isi->vdev->fops = &isi_fops;
>> +	isi->vdev->v4l2_dev = &isi->v4l2_dev;
>> +	isi->vdev->queue = &isi->queue;
>> +	strlcpy(isi->vdev->name, KBUILD_MODNAME, sizeof(isi->vdev->name));
>> +	isi->vdev->release = video_device_release;
>> +	isi->vdev->ioctl_ops = &isi_ioctl_ops;
>> +	isi->vdev->lock = &isi->lock;
>> +	isi->vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING |
>> +		V4L2_CAP_READWRITE;
>> +	video_set_drvdata(isi->vdev, isi);
>> +
>> +	/* buffer queue */
>> +	q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
>> +	q->io_modes = VB2_MMAP | VB2_READ | VB2_DMABUF;
>> +	q->lock = &isi->lock;
>> +	q->drv_priv = isi;
>> +	q->buf_struct_size = sizeof(struct frame_buffer);
>> +	q->ops = &isi_video_qops;
>> +	q->mem_ops = &vb2_dma_contig_memops;
>> +	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
>> +	q->min_buffers_needed = 2;
>> +	q->dev = &pdev->dev;
>> +
>> +	ret = vb2_queue_init(q);
>> +	if (ret < 0) {
>> +		dev_err(&pdev->dev, "failed to initialize VB2 queue\n");
>> +		goto err_vb2_queue;
>> +	}
> 
> Regards,
> 	Songjun Wu
> 
> 
> --
> To unsubscribe from this list: send the line "unsubscribe linux-media" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 

Re: [RFC PATCH 5/7] ov7670: add devicetree support

[Sakari Ailus]

Hi Hans,

On Wed, Aug 17, 2016 at 08:29:41AM +0200, Hans Verkuil wrote:
> From: Hans Verkuil <hans.verkuil@cisco.com>
> 
> Add DT support. Use it to get the reset and pwdn pins (if there are any).
> Tested with one sensor requiring reset/pwdn and one sensor that doesn't
> have reset/pwdn pins.
> 
> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
> ---
>  .../devicetree/bindings/media/i2c/ov7670.txt       | 44 +++++++++++++++++++
>  MAINTAINERS                                        |  1 +
>  drivers/media/i2c/ov7670.c                         | 51 ++++++++++++++++++++++
>  3 files changed, 96 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/media/i2c/ov7670.txt
> 
> diff --git a/Documentation/devicetree/bindings/media/i2c/ov7670.txt b/Documentation/devicetree/bindings/media/i2c/ov7670.txt
> new file mode 100644
> index 0000000..3231c47
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/i2c/ov7670.txt
> @@ -0,0 +1,44 @@
> +* Omnivision OV7670 CMOS sensor
> +
> +The Omnivision OV7670 sensor support multiple resolutions output, such as
> +CIF, SVGA, UXGA. It also can support YUV422/420, RGB565/555 or raw RGB
> +output format.
> +
> +Required Properties:
> +- compatible: should be "ovti,ov7670"
> +- clocks: reference to the xvclk input clock.
> +- clock-names: should be "xvclk".

Where does "xvclk" come from? Why not "xclk"?

> +
> +Optional Properties:
> +- resetb-gpios: reference to the GPIO connected to the resetb pin, if any.
> +- pwdn-gpios: reference to the GPIO connected to the pwdn pin, if any.
> +
> +The device node must contain one 'port' child node for its digital output
> +video port, in accordance with the video interface bindings defined in
> +Documentation/devicetree/bindings/media/video-interfaces.txt.
> +
> +Example:
> +
> +	i2c1: i2c@f0018000 {
> +		status = "okay";
> +
> +		ov7670: camera@0x21 {
> +			compatible = "ovti,ov7670";
> +			reg = <0x21>;
> +			pinctrl-names = "default";
> +			pinctrl-0 = <&pinctrl_pck0_as_isi_mck &pinctrl_sensor_power &pinctrl_sensor_reset>;
> +			resetb-gpios = <&pioE 11 GPIO_ACTIVE_LOW>;
> +			pwdn-gpios = <&pioE 13 GPIO_ACTIVE_HIGH>;
> +			clocks = <&pck0>;
> +			clock-names = "xvclk";
> +			assigned-clocks = <&pck0>;
> +			assigned-clock-rates = <24000000>;

What's the difference between assigned-clocks and just clocks?

The example in video-interfaces.txt uses "clocks" and "clock-frequency" for
the purpose.

> +

How about the regulators? This sensor requires three. You probably have
fixed regulators there if things just work.

> +			port {
> +				ov7670_0: endpoint {
> +					remote-endpoint = <&isi_0>;
> +					bus-width = <8>;
> +				};
> +			};
> +		};
> +	};
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 20bb1d0..1fec3a6 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -8615,6 +8615,7 @@ L:	linux-media@vger.kernel.org
>  T:	git git://linuxtv.org/media_tree.git
>  S:	Maintained
>  F:	drivers/media/i2c/ov7670.c
> +F:	Documentation/devicetree/bindings/media/i2c/ov7670.txt
>  
>  ONENAND FLASH DRIVER
>  M:	Kyungmin Park <kyungmin.park@samsung.com>
> diff --git a/drivers/media/i2c/ov7670.c b/drivers/media/i2c/ov7670.c
> index 57adf3d..a401b99 100644
> --- a/drivers/media/i2c/ov7670.c
> +++ b/drivers/media/i2c/ov7670.c
> @@ -17,6 +17,9 @@
>  #include <linux/i2c.h>
>  #include <linux/delay.h>
>  #include <linux/videodev2.h>
> +#include <linux/gpio.h>
> +#include <linux/gpio/consumer.h>
> +#include <linux/of_gpio.h>

You don't need at least of_gpio here. Probably linux/gpio.h is redundant as
well.

>  #include <media/v4l2-device.h>
>  #include <media/v4l2-ctrls.h>
>  #include <media/v4l2-clk.h>
> @@ -231,6 +234,8 @@ struct ov7670_info {
>  	};
>  	struct ov7670_format_struct *fmt;  /* Current format */
>  	struct v4l2_clk *clk;
> +	struct gpio_desc *resetb_gpio;
> +	struct gpio_desc *pwdn_gpio;
>  	int min_width;			/* Filter out smaller sizes */
>  	int min_height;			/* Filter out smaller sizes */
>  	int clock_speed;		/* External clock speed (MHz) */
> @@ -1551,6 +1556,40 @@ static const struct ov7670_devtype ov7670_devdata[] = {
>  	},
>  };
>  
> +static int ov7670_probe_dt(struct i2c_client *client,
> +		struct ov7670_info *info)
> +{
> +	/* Request the reset GPIO deasserted */
> +	info->resetb_gpio = devm_gpiod_get_optional(&client->dev, "resetb",
> +			GPIOD_OUT_LOW);
> +	if (!info->resetb_gpio)
> +		dev_dbg(&client->dev, "resetb gpio is not assigned!\n");

AFAIR the GPIO framework already complains vocally if the GPIO can't be
found.

> +	else if (IS_ERR(info->resetb_gpio)) {
> +		dev_info(&client->dev, "no resetb\n");
> +		return PTR_ERR(info->resetb_gpio);
> +	}
> +
> +	/* Request the power down GPIO asserted */
> +	info->pwdn_gpio = devm_gpiod_get_optional(&client->dev, "pwdn",
> +			GPIOD_OUT_LOW);
> +	if (!info->pwdn_gpio)
> +		dev_dbg(&client->dev, "pwdn gpio is not assigned!\n");
> +	else if (IS_ERR(info->pwdn_gpio)) {
> +		dev_info(&client->dev, "no pwdn\n");
> +		return PTR_ERR(info->pwdn_gpio);
> +	}
> +
> +	if (info->resetb_gpio) {
> +		/* Active the resetb pin to perform a reset pulse */
> +		gpiod_direction_output(info->resetb_gpio, 1);
> +		usleep_range(3000, 5000);

Don't you typically do this when you power on the device rather than here?

> +		gpiod_direction_output(info->resetb_gpio, 0);
> +	}
> +	usleep_range(3000, 5000);
> +
> +	return 0;
> +}
> +
>  static int ov7670_probe(struct i2c_client *client,
>  			const struct i2c_device_id *id)
>  {
> @@ -1596,6 +1635,10 @@ static int ov7670_probe(struct i2c_client *client,
>  		return -EPROBE_DEFER;
>  	v4l2_clk_enable(info->clk);
>  
> +	ret = ov7670_probe_dt(client, info);

How did this use to work before this patch? :-)

> +	if (ret)
> +		return ret;
> +
>  	info->clock_speed = v4l2_clk_get_rate(info->clk) / 1000000;
>  	if (info->clock_speed < 12 ||
>  	    info->clock_speed > 48)
> @@ -1707,6 +1750,14 @@ static const struct i2c_device_id ov7670_id[] = {
>  };
>  MODULE_DEVICE_TABLE(i2c, ov7670_id);
>  
> +#if IS_ENABLED(CONFIG_OF)
> +static const struct of_device_id ov7670_of_match[] = {
> +	{ .compatible = "ovti,ov7670", },
> +	{ /* sentinel */ },
> +};
> +MODULE_DEVICE_TABLE(of, ov7670_of_match);
> +#endif
> +
>  static struct i2c_driver ov7670_driver = {
>  	.driver = {
>  		.name	= "ov7670",

-- 
Kind regards,

Sakari Ailus
e-mail: sakari.ailus@iki.fi	XMPP: sailus@retiisi.org.uk

Re: [RFC PATCH 4/7] ov7670: get xvclk

[Sakari Ailus]

Hi Hans,

On Wed, Aug 17, 2016 at 08:29:40AM +0200, Hans Verkuil wrote:
> From: Hans Verkuil <hans.verkuil@cisco.com>
> 
> Get the clock for this sensor.
> 
> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
> ---
>  drivers/media/i2c/ov7670.c | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
> 
> diff --git a/drivers/media/i2c/ov7670.c b/drivers/media/i2c/ov7670.c
> index fe527b2..57adf3d 100644
> --- a/drivers/media/i2c/ov7670.c
> +++ b/drivers/media/i2c/ov7670.c
> @@ -10,6 +10,7 @@
>   * This file may be distributed under the terms of the GNU General
>   * Public License, version 2.
>   */
> +#include <linux/clk.h>
>  #include <linux/init.h>
>  #include <linux/module.h>
>  #include <linux/slab.h>
> @@ -18,6 +19,7 @@
>  #include <linux/videodev2.h>
>  #include <media/v4l2-device.h>
>  #include <media/v4l2-ctrls.h>
> +#include <media/v4l2-clk.h>
>  #include <media/v4l2-mediabus.h>
>  #include <media/v4l2-image-sizes.h>
>  #include <media/i2c/ov7670.h>
> @@ -228,6 +230,7 @@ struct ov7670_info {
>  		struct v4l2_ctrl *hue;
>  	};
>  	struct ov7670_format_struct *fmt;  /* Current format */
> +	struct v4l2_clk *clk;
>  	int min_width;			/* Filter out smaller sizes */
>  	int min_height;			/* Filter out smaller sizes */
>  	int clock_speed;		/* External clock speed (MHz) */
> @@ -1588,8 +1591,19 @@ static int ov7670_probe(struct i2c_client *client,
>  			info->pclk_hb_disable = true;
>  	}
>  
> +	info->clk = v4l2_clk_get(&client->dev, "xvclk");

If you don't use this with either em28xx or SoC camera framework, you could
use (devm_)clk_get() directly.

> +	if (IS_ERR(info->clk))
> +		return -EPROBE_DEFER;
> +	v4l2_clk_enable(info->clk);

The clock is left enabled after probe until remove. Runtime PM support would
be nice.

Can probe fail later on?

> +
> +	info->clock_speed = v4l2_clk_get_rate(info->clk) / 1000000;
> +	if (info->clock_speed < 12 ||
> +	    info->clock_speed > 48)
> +		return -EINVAL;
> +
>  	/* Make sure it's an ov7670 */
>  	ret = ov7670_detect(sd);
> +
>  	if (ret) {
>  		v4l_dbg(1, debug, client,
>  			"chip found @ 0x%x (%s) is not an ov7670 chip.\n",
> @@ -1682,6 +1696,7 @@ static int ov7670_remove(struct i2c_client *client)
>  #if defined(CONFIG_MEDIA_CONTROLLER)
>  	media_entity_cleanup(&sd->entity);
>  #endif
> +	v4l2_clk_put(info->clk);
>  	return 0;
>  }

-- 
Sakari Ailus
e-mail: sakari.ailus@iki.fi	XMPP: sailus@retiisi.org.uk

Re: [RFC PATCH 5/7] ov7670: add devicetree support

[Sakari Ailus]

Hi Laurent,

On Wed, Aug 17, 2016 at 03:44:00PM +0300, Laurent Pinchart wrote:
> > +			assigned-clock-rates = <24000000>;
> 
> You should compute and set the clock rate dynamically in the driver, not 
> hardcode it in DT.

This frequency is typically defined by hardware engineers and it's
hand-picked from possible ranges. What counts is EMC so you don't disturb
a GSM/3G/4G modem (if you have one) or GPS receiver, for instance. In order
to freely choose this frequency, you'd also need to be aware of the limits
of the sensor's internal clock tree, and make sure you still would be able
to obtain the desired frame rates for there are often corner cases where the
resulting maximum pixel clock may be substantially lower if your input
frequency goes up.

I also haven't encountered a use case for more than a single, fixed
frequency. In other words I'd keep this constant.

-- 
Regards,

Sakari Ailus
e-mail: sakari.ailus@iki.fi	XMPP: sailus@retiisi.org.uk

Re: [RFC PATCH 5/7] ov7670: add devicetree support

[Laurent Pinchart]

Hello Sakari,

On Wednesday 21 Sep 2016 14:33:29 Sakari Ailus wrote:
> Hi Laurent,
> 
> On Wed, Aug 17, 2016 at 03:44:00PM +0300, Laurent Pinchart wrote:
> > > +			assigned-clock-rates = <24000000>;
> > 
> > You should compute and set the clock rate dynamically in the driver, not
> > hardcode it in DT.
> 
> This frequency is typically defined by hardware engineers and it's
> hand-picked from possible ranges. What counts is EMC so you don't disturb
> a GSM/3G/4G modem (if you have one) or GPS receiver, for instance. In order
> to freely choose this frequency, you'd also need to be aware of the limits
> of the sensor's internal clock tree, and make sure you still would be able
> to obtain the desired frame rates for there are often corner cases where the
> resulting maximum pixel clock may be substantially lower if your input
> frequency goes up.
> 
> I also haven't encountered a use case for more than a single, fixed
> frequency. In other words I'd keep this constant.

My review predates our recent discussion on this topic. I still believe that 
in the general case we could want to express allowable frequencies constraints 
in DT and let the driver compute the desired frequency based on timings. 
However, I also agree that there are very few cases for this, so it's not 
really worth tackling the issue at the moment. I'm thus fine with the usage of 
assigned-clock-rates.

-- 
Regards,

Laurent Pinchart

Re: [RFC PATCH 5/7] ov7670: add devicetree support

[Laurent Pinchart]

Hi Hans,

On Friday 26 Aug 2016 09:45:25 Hans Verkuil wrote:
> On 08/17/2016 02:44 PM, Laurent Pinchart wrote:
> > On Wednesday 17 Aug 2016 08:29:41 Hans Verkuil wrote:
> >> From: Hans Verkuil <hans.verkuil@cisco.com>
> >> 
> >> Add DT support. Use it to get the reset and pwdn pins (if there are any).
> >> Tested with one sensor requiring reset/pwdn and one sensor that doesn't
> >> have reset/pwdn pins.
> >> 
> >> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
> >> ---
> >> 
> >>  .../devicetree/bindings/media/i2c/ov7670.txt       | 44 ++++++++++++++
> >>  MAINTAINERS                                        |  1 +
> >>  drivers/media/i2c/ov7670.c                         | 51 ++++++++++++++++
> >>  3 files changed, 96 insertions(+)
> >>  create mode 100644
> >>  Documentation/devicetree/bindings/media/i2c/ov7670.txt
> >> 
> >> diff --git a/Documentation/devicetree/bindings/media/i2c/ov7670.txt
> >> b/Documentation/devicetree/bindings/media/i2c/ov7670.txt new file mode
> >> 100644
> >> index 0000000..3231c47
> >> --- /dev/null
> >> +++ b/Documentation/devicetree/bindings/media/i2c/ov7670.txt
> >> @@ -0,0 +1,44 @@
> >> +* Omnivision OV7670 CMOS sensor
> >> +
> >> +The Omnivision OV7670 sensor support multiple resolutions output, such
> >> as
> > 
> > s/support/supports/
> > 
> >> +CIF, SVGA, UXGA. It also can support YUV422/420, RGB565/555 or raw RGB
> >> +output format.
> > 
> > s/format/formats/ (and possibly s/can support/can support the/)
> > 
> >> +
> >> +Required Properties:
> >> +- compatible: should be "ovti,ov7670"
> >> +- clocks: reference to the xvclk input clock.
> >> +- clock-names: should be "xvclk".
> >> +
> >> +Optional Properties:
> >> +- resetb-gpios: reference to the GPIO connected to the resetb pin, if
> >> any.
> >> +- pwdn-gpios: reference to the GPIO connected to the pwdn pin, if any.
> >> +
> >> +The device node must contain one 'port' child node for its digital
> >> output
> >> +video port, in accordance with the video interface bindings defined in
> >> +Documentation/devicetree/bindings/media/video-interfaces.txt.
> >> +
> >> +Example:
> >> +
> >> +	i2c1: i2c@f0018000 {
> >> +		status = "okay";
> >> +
> >> +		ov7670: camera@0x21 {
> >> +			compatible = "ovti,ov7670";
> >> +			reg = <0x21>;
> >> +			pinctrl-names = "default";
> >> +			pinctrl-0 = <&pinctrl_pck0_as_isi_mck
> >> &pinctrl_sensor_power
> >> &pinctrl_sensor_reset>;
> > 
> > The pinctrl properties should be part of the clock provider DT node.
> 
> Do you have examples of that?

Sure, it's pretty simple. The pinctrl_pck0_as_isi_mck can just be moved to the 
isi DT node, as the isi is the clock provider for the sensor.

The two other properties, however, have to stay here (I think I've overlooked 
them in my previous review e-mail), so I'm also not totally opposed to keeping 
all three pinctrl entries together.

> I just copied this from existing atmel dts code
> (arch/arm/boot/dts/sama5d3xmb.dtsi).
>
> >> +			resetb-gpios = <&pioE 11 GPIO_ACTIVE_LOW>;
> >> +			pwdn-gpios = <&pioE 13 GPIO_ACTIVE_HIGH>;
> >> +			clocks = <&pck0>;
> >> +			clock-names = "xvclk";

I missed this, isn't the pin named "xclk" in the datasheet ?

> >> +			assigned-clocks = <&pck0>;
> >> +			assigned-clock-rates = <24000000>;
> > 
> > You should compute and set the clock rate dynamically in the driver, not
> > hardcode it in DT.
> 
> Do you have an example of that? Again, I just copied this from the same
> sama5d3xmb.dtsi.

Please see my reply to Sakari's e-mail in the same thread.

-- 
Regards,

Laurent Pinchart

Re: [RFC PATCH 6/7] atmel-isi: remove dependency of the soc-camera framework

[Wu, Songjun]

On 9/21/2016 15:04, Hans Verkuil wrote:
> On 08/18/2016 07:53 AM, Wu, Songjun wrote:
>> Hi Hans,
>>
>> Thank you for the patch.
>>
>> On 8/17/2016 14:29, Hans Verkuil wrote:
>>> From: Hans Verkuil <hans.verkuil@cisco.com>
>>>
>>> This patch converts the atmel-isi driver from a soc-camera driver to a driver
>>> that is stand-alone.
>>>
>>> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
>>> ---
>>>  drivers/media/platform/soc_camera/Kconfig     |    3 +-
>>>  drivers/media/platform/soc_camera/atmel-isi.c | 1216 +++++++++++++++----------
>>>  2 files changed, 721 insertions(+), 498 deletions(-)
>>>
>>> diff --git a/drivers/media/platform/soc_camera/Kconfig b/drivers/media/platform/soc_camera/Kconfig
>>> index 39f6641..f74e358 100644
>>> --- a/drivers/media/platform/soc_camera/Kconfig
>>> +++ b/drivers/media/platform/soc_camera/Kconfig
>>> @@ -54,9 +54,8 @@ config VIDEO_SH_MOBILE_CEU
>>>
>>>  config VIDEO_ATMEL_ISI
>>>  	tristate "ATMEL Image Sensor Interface (ISI) support"
>>> -	depends on VIDEO_DEV && SOC_CAMERA
>>> +	depends on VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API && OF && HAS_DMA
>>>  	depends on ARCH_AT91 || COMPILE_TEST
>>> -	depends on HAS_DMA
>>>  	select VIDEOBUF2_DMA_CONTIG
>>>  	---help---
>>>  	  This module makes the ATMEL Image Sensor Interface available
>>> diff --git a/drivers/media/platform/soc_camera/atmel-isi.c b/drivers/media/platform/soc_camera/atmel-isi.c
>>> index 30211f6..9947acb 100644
>>> --- a/drivers/media/platform/soc_camera/atmel-isi.c
>>> +++ b/drivers/media/platform/soc_camera/atmel-isi.c
>
>
>>> +
>>>  static int atmel_isi_probe(struct platform_device *pdev)
>>>  {
>>>  	int irq;
>>>  	struct atmel_isi *isi;
>>> +	struct vb2_queue *q;
>>>  	struct resource *regs;
>>>  	int ret, i;
>>> -	struct soc_camera_host *soc_host;
>>>
>>>  	isi = devm_kzalloc(&pdev->dev, sizeof(struct atmel_isi), GFP_KERNEL);
>>>  	if (!isi) {
>>> @@ -1044,20 +1216,65 @@ static int atmel_isi_probe(struct platform_device *pdev)
>>>  		return ret;
>>>
>>>  	isi->active = NULL;
>>> -	spin_lock_init(&isi->lock);
>>> +	isi->dev = &pdev->dev;
>>> +	mutex_init(&isi->lock);
>>> +	spin_lock_init(&isi->irqlock);
>>>  	INIT_LIST_HEAD(&isi->video_buffer_list);
>>>  	INIT_LIST_HEAD(&isi->dma_desc_head);
>>>
>>> +	q = &isi->queue;
>>> +
>>> +	/* Initialize the top-level structure */
>>> +	ret = v4l2_device_register(&pdev->dev, &isi->v4l2_dev);
>>> +	if (ret)
>>> +		return ret;
>>> +
>>> +	isi->vdev = video_device_alloc();
>>> +	if (isi->vdev == NULL) {
>>> +		ret = -ENOMEM;
>>> +		goto err_vdev_alloc;
>>> +	}
>> If video device is unregistered, the ISI driver must be reloaded when
>> registering a new video device.
>> So '*vdev' can be replaced by 'vdev', or move the code above to
>> isi_graph_notify_complete.
>
> I'm afraid I don't understand what you mean. Can you clarify?
>

If the sensor driver is defined as a module, e.g. ov7670.ko. 'insmod 
ov7670.ko' and 'rmmod ov7670', video_device_release will be called, and 
'*vdev' will be freed, when 'insmod ov7670.ko' is run again, the error 
will will occur, if the code above is moved to 
isi_graph_notify_complete, there will be no error.

> Regards,
>
> 	Hans
>
>>
>>> +
>>> +	/* video node */
>>> +	isi->vdev->fops = &isi_fops;
>>> +	isi->vdev->v4l2_dev = &isi->v4l2_dev;
>>> +	isi->vdev->queue = &isi->queue;
>>> +	strlcpy(isi->vdev->name, KBUILD_MODNAME, sizeof(isi->vdev->name));
>>> +	isi->vdev->release = video_device_release;
>>> +	isi->vdev->ioctl_ops = &isi_ioctl_ops;
>>> +	isi->vdev->lock = &isi->lock;
>>> +	isi->vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING |
>>> +		V4L2_CAP_READWRITE;
>>> +	video_set_drvdata(isi->vdev, isi);
>>> +
>>> +	/* buffer queue */
>>> +	q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
>>> +	q->io_modes = VB2_MMAP | VB2_READ | VB2_DMABUF;
>>> +	q->lock = &isi->lock;
>>> +	q->drv_priv = isi;
>>> +	q->buf_struct_size = sizeof(struct frame_buffer);
>>> +	q->ops = &isi_video_qops;
>>> +	q->mem_ops = &vb2_dma_contig_memops;
>>> +	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
>>> +	q->min_buffers_needed = 2;
>>> +	q->dev = &pdev->dev;
>>> +
>>> +	ret = vb2_queue_init(q);
>>> +	if (ret < 0) {
>>> +		dev_err(&pdev->dev, "failed to initialize VB2 queue\n");
>>> +		goto err_vb2_queue;
>>> +	}
>>
>> Regards,
>> 	Songjun Wu
>>
>>
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-media" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>

Re: [RFC PATCH 6/7] atmel-isi: remove dependency of the soc-camera framework

[Wu, Songjun]

Hi Hans,

Do you have any issue on this patch?
Could I give you some help? :)

On 9/23/2016 14:05, Wu, Songjun wrote:
>
>
> On 9/21/2016 15:04, Hans Verkuil wrote:
>> On 08/18/2016 07:53 AM, Wu, Songjun wrote:
>>> Hi Hans,
>>>
>>> Thank you for the patch.
>>>
>>> On 8/17/2016 14:29, Hans Verkuil wrote:
>>>> From: Hans Verkuil <hans.verkuil@cisco.com>
>>>>
>>>> This patch converts the atmel-isi driver from a soc-camera driver to
>>>> a driver
>>>> that is stand-alone.
>>>>
>>>> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
>>>> ---
>>>>  drivers/media/platform/soc_camera/Kconfig     |    3 +-
>>>>  drivers/media/platform/soc_camera/atmel-isi.c | 1216
>>>> +++++++++++++++----------
>>>>  2 files changed, 721 insertions(+), 498 deletions(-)
>>>>
>>>> diff --git a/drivers/media/platform/soc_camera/Kconfig
>>>> b/drivers/media/platform/soc_camera/Kconfig
>>>> index 39f6641..f74e358 100644
>>>> --- a/drivers/media/platform/soc_camera/Kconfig
>>>> +++ b/drivers/media/platform/soc_camera/Kconfig
>>>> @@ -54,9 +54,8 @@ config VIDEO_SH_MOBILE_CEU
>>>>
>>>>  config VIDEO_ATMEL_ISI
>>>>      tristate "ATMEL Image Sensor Interface (ISI) support"
>>>> -    depends on VIDEO_DEV && SOC_CAMERA
>>>> +    depends on VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API && OF && HAS_DMA
>>>>      depends on ARCH_AT91 || COMPILE_TEST
>>>> -    depends on HAS_DMA
>>>>      select VIDEOBUF2_DMA_CONTIG
>>>>      ---help---
>>>>        This module makes the ATMEL Image Sensor Interface available
>>>> diff --git a/drivers/media/platform/soc_camera/atmel-isi.c
>>>> b/drivers/media/platform/soc_camera/atmel-isi.c
>>>> index 30211f6..9947acb 100644
>>>> --- a/drivers/media/platform/soc_camera/atmel-isi.c
>>>> +++ b/drivers/media/platform/soc_camera/atmel-isi.c
>>
>>
>>>> +
>>>>  static int atmel_isi_probe(struct platform_device *pdev)
>>>>  {
>>>>      int irq;
>>>>      struct atmel_isi *isi;
>>>> +    struct vb2_queue *q;
>>>>      struct resource *regs;
>>>>      int ret, i;
>>>> -    struct soc_camera_host *soc_host;
>>>>
>>>>      isi = devm_kzalloc(&pdev->dev, sizeof(struct atmel_isi),
>>>> GFP_KERNEL);
>>>>      if (!isi) {
>>>> @@ -1044,20 +1216,65 @@ static int atmel_isi_probe(struct
>>>> platform_device *pdev)
>>>>          return ret;
>>>>
>>>>      isi->active = NULL;
>>>> -    spin_lock_init(&isi->lock);
>>>> +    isi->dev = &pdev->dev;
>>>> +    mutex_init(&isi->lock);
>>>> +    spin_lock_init(&isi->irqlock);
>>>>      INIT_LIST_HEAD(&isi->video_buffer_list);
>>>>      INIT_LIST_HEAD(&isi->dma_desc_head);
>>>>
>>>> +    q = &isi->queue;
>>>> +
>>>> +    /* Initialize the top-level structure */
>>>> +    ret = v4l2_device_register(&pdev->dev, &isi->v4l2_dev);
>>>> +    if (ret)
>>>> +        return ret;
>>>> +
>>>> +    isi->vdev = video_device_alloc();
>>>> +    if (isi->vdev == NULL) {
>>>> +        ret = -ENOMEM;
>>>> +        goto err_vdev_alloc;
>>>> +    }
>>> If video device is unregistered, the ISI driver must be reloaded when
>>> registering a new video device.
>>> So '*vdev' can be replaced by 'vdev', or move the code above to
>>> isi_graph_notify_complete.
>>
>> I'm afraid I don't understand what you mean. Can you clarify?
>>
>
> If the sensor driver is defined as a module, e.g. ov7670.ko. 'insmod
> ov7670.ko' and 'rmmod ov7670', video_device_release will be called, and
> '*vdev' will be freed, when 'insmod ov7670.ko' is run again, the error
> will will occur, if the code above is moved to
> isi_graph_notify_complete, there will be no error.
>
>> Regards,
>>
>>     Hans
>>
>>>
>>>> +
>>>> +    /* video node */
>>>> +    isi->vdev->fops = &isi_fops;
>>>> +    isi->vdev->v4l2_dev = &isi->v4l2_dev;
>>>> +    isi->vdev->queue = &isi->queue;
>>>> +    strlcpy(isi->vdev->name, KBUILD_MODNAME, sizeof(isi->vdev->name));
>>>> +    isi->vdev->release = video_device_release;
>>>> +    isi->vdev->ioctl_ops = &isi_ioctl_ops;
>>>> +    isi->vdev->lock = &isi->lock;
>>>> +    isi->vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE |
>>>> V4L2_CAP_STREAMING |
>>>> +        V4L2_CAP_READWRITE;
>>>> +    video_set_drvdata(isi->vdev, isi);
>>>> +
>>>> +    /* buffer queue */
>>>> +    q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
>>>> +    q->io_modes = VB2_MMAP | VB2_READ | VB2_DMABUF;
>>>> +    q->lock = &isi->lock;
>>>> +    q->drv_priv = isi;
>>>> +    q->buf_struct_size = sizeof(struct frame_buffer);
>>>> +    q->ops = &isi_video_qops;
>>>> +    q->mem_ops = &vb2_dma_contig_memops;
>>>> +    q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
>>>> +    q->min_buffers_needed = 2;
>>>> +    q->dev = &pdev->dev;
>>>> +
>>>> +    ret = vb2_queue_init(q);
>>>> +    if (ret < 0) {
>>>> +        dev_err(&pdev->dev, "failed to initialize VB2 queue\n");
>>>> +        goto err_vb2_queue;
>>>> +    }
>>>
>>> Regards,
>>>     Songjun Wu
>>>
>>>
>>> --
>>> To unsubscribe from this list: send the line "unsubscribe
>>> linux-media" in
>>> the body of a message to majordomo@vger.kernel.org
>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>

Re: [RFC PATCH 6/7] atmel-isi: remove dependency of the soc-camera framework

[Hans Verkuil]

On 10/18/16 11:21, Wu, Songjun wrote:
> Hi Hans,
>
> Do you have any issue on this patch?

ENOTIME :-(

> Could I give you some help? :)

I would certainly help if you can make the requested change to this patch.

Let me know if you want to do that, because in that case I'll rebase my tree
to the latest media_tree master.

Regards,

	Hans

>
> On 9/23/2016 14:05, Wu, Songjun wrote:
>>
>>
>> On 9/21/2016 15:04, Hans Verkuil wrote:
>>> On 08/18/2016 07:53 AM, Wu, Songjun wrote:
>>>> Hi Hans,
>>>>
>>>> Thank you for the patch.
>>>>
>>>> On 8/17/2016 14:29, Hans Verkuil wrote:
>>>>> From: Hans Verkuil <hans.verkuil@cisco.com>
>>>>>
>>>>> This patch converts the atmel-isi driver from a soc-camera driver to
>>>>> a driver
>>>>> that is stand-alone.
>>>>>
>>>>> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
>>>>> ---
>>>>>  drivers/media/platform/soc_camera/Kconfig     |    3 +-
>>>>>  drivers/media/platform/soc_camera/atmel-isi.c | 1216
>>>>> +++++++++++++++----------
>>>>>  2 files changed, 721 insertions(+), 498 deletions(-)
>>>>>
>>>>> diff --git a/drivers/media/platform/soc_camera/Kconfig
>>>>> b/drivers/media/platform/soc_camera/Kconfig
>>>>> index 39f6641..f74e358 100644
>>>>> --- a/drivers/media/platform/soc_camera/Kconfig
>>>>> +++ b/drivers/media/platform/soc_camera/Kconfig
>>>>> @@ -54,9 +54,8 @@ config VIDEO_SH_MOBILE_CEU
>>>>>
>>>>>  config VIDEO_ATMEL_ISI
>>>>>      tristate "ATMEL Image Sensor Interface (ISI) support"
>>>>> -    depends on VIDEO_DEV && SOC_CAMERA
>>>>> +    depends on VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API && OF && HAS_DMA
>>>>>      depends on ARCH_AT91 || COMPILE_TEST
>>>>> -    depends on HAS_DMA
>>>>>      select VIDEOBUF2_DMA_CONTIG
>>>>>      ---help---
>>>>>        This module makes the ATMEL Image Sensor Interface available
>>>>> diff --git a/drivers/media/platform/soc_camera/atmel-isi.c
>>>>> b/drivers/media/platform/soc_camera/atmel-isi.c
>>>>> index 30211f6..9947acb 100644
>>>>> --- a/drivers/media/platform/soc_camera/atmel-isi.c
>>>>> +++ b/drivers/media/platform/soc_camera/atmel-isi.c
>>>
>>>
>>>>> +
>>>>>  static int atmel_isi_probe(struct platform_device *pdev)
>>>>>  {
>>>>>      int irq;
>>>>>      struct atmel_isi *isi;
>>>>> +    struct vb2_queue *q;
>>>>>      struct resource *regs;
>>>>>      int ret, i;
>>>>> -    struct soc_camera_host *soc_host;
>>>>>
>>>>>      isi = devm_kzalloc(&pdev->dev, sizeof(struct atmel_isi),
>>>>> GFP_KERNEL);
>>>>>      if (!isi) {
>>>>> @@ -1044,20 +1216,65 @@ static int atmel_isi_probe(struct
>>>>> platform_device *pdev)
>>>>>          return ret;
>>>>>
>>>>>      isi->active = NULL;
>>>>> -    spin_lock_init(&isi->lock);
>>>>> +    isi->dev = &pdev->dev;
>>>>> +    mutex_init(&isi->lock);
>>>>> +    spin_lock_init(&isi->irqlock);
>>>>>      INIT_LIST_HEAD(&isi->video_buffer_list);
>>>>>      INIT_LIST_HEAD(&isi->dma_desc_head);
>>>>>
>>>>> +    q = &isi->queue;
>>>>> +
>>>>> +    /* Initialize the top-level structure */
>>>>> +    ret = v4l2_device_register(&pdev->dev, &isi->v4l2_dev);
>>>>> +    if (ret)
>>>>> +        return ret;
>>>>> +
>>>>> +    isi->vdev = video_device_alloc();
>>>>> +    if (isi->vdev == NULL) {
>>>>> +        ret = -ENOMEM;
>>>>> +        goto err_vdev_alloc;
>>>>> +    }
>>>> If video device is unregistered, the ISI driver must be reloaded when
>>>> registering a new video device.
>>>> So '*vdev' can be replaced by 'vdev', or move the code above to
>>>> isi_graph_notify_complete.
>>>
>>> I'm afraid I don't understand what you mean. Can you clarify?
>>>
>>
>> If the sensor driver is defined as a module, e.g. ov7670.ko. 'insmod
>> ov7670.ko' and 'rmmod ov7670', video_device_release will be called, and
>> '*vdev' will be freed, when 'insmod ov7670.ko' is run again, the error
>> will will occur, if the code above is moved to
>> isi_graph_notify_complete, there will be no error.
>>
>>> Regards,
>>>
>>>     Hans
>>>
>>>>
>>>>> +
>>>>> +    /* video node */
>>>>> +    isi->vdev->fops = &isi_fops;
>>>>> +    isi->vdev->v4l2_dev = &isi->v4l2_dev;
>>>>> +    isi->vdev->queue = &isi->queue;
>>>>> +    strlcpy(isi->vdev->name, KBUILD_MODNAME,
>>>>> sizeof(isi->vdev->name));
>>>>> +    isi->vdev->release = video_device_release;
>>>>> +    isi->vdev->ioctl_ops = &isi_ioctl_ops;
>>>>> +    isi->vdev->lock = &isi->lock;
>>>>> +    isi->vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE |
>>>>> V4L2_CAP_STREAMING |
>>>>> +        V4L2_CAP_READWRITE;
>>>>> +    video_set_drvdata(isi->vdev, isi);
>>>>> +
>>>>> +    /* buffer queue */
>>>>> +    q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
>>>>> +    q->io_modes = VB2_MMAP | VB2_READ | VB2_DMABUF;
>>>>> +    q->lock = &isi->lock;
>>>>> +    q->drv_priv = isi;
>>>>> +    q->buf_struct_size = sizeof(struct frame_buffer);
>>>>> +    q->ops = &isi_video_qops;
>>>>> +    q->mem_ops = &vb2_dma_contig_memops;
>>>>> +    q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
>>>>> +    q->min_buffers_needed = 2;
>>>>> +    q->dev = &pdev->dev;
>>>>> +
>>>>> +    ret = vb2_queue_init(q);
>>>>> +    if (ret < 0) {
>>>>> +        dev_err(&pdev->dev, "failed to initialize VB2 queue\n");
>>>>> +        goto err_vb2_queue;
>>>>> +    }
>>>>
>>>> Regards,
>>>>     Songjun Wu
>>>>
>>>>
>>>> --
>>>> To unsubscribe from this list: send the line "unsubscribe
>>>> linux-media" in
>>>> the body of a message to majordomo@vger.kernel.org
>>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>>

Re: [RFC PATCH 6/7] atmel-isi: remove dependency of the soc-camera framework

[Wu, Songjun]

On 10/18/2016 18:58, Hans Verkuil wrote:
> On 10/18/16 11:21, Wu, Songjun wrote:
>> Hi Hans,
>>
>> Do you have any issue on this patch?
>
> ENOTIME :-(
>
>> Could I give you some help? :)
>
> I would certainly help if you can make the requested change to this patch.
>
> Let me know if you want to do that, because in that case I'll rebase my
> tree
> to the latest media_tree master.
>
Yes, I would like to make the requested change to this patch. :)
It seems the patch is not based on the latest media_tree master.
Will you rebase this patch to the latest media_tree, or let me move it 
and make the requested change based on the media_tree?

> Regards,
>
>     Hans
>
>>
>> On 9/23/2016 14:05, Wu, Songjun wrote:
>>>
>>>
>>> On 9/21/2016 15:04, Hans Verkuil wrote:
>>>> On 08/18/2016 07:53 AM, Wu, Songjun wrote:
>>>>> Hi Hans,
>>>>>
>>>>> Thank you for the patch.
>>>>>
>>>>> On 8/17/2016 14:29, Hans Verkuil wrote:
>>>>>> From: Hans Verkuil <hans.verkuil@cisco.com>
>>>>>>
>>>>>> This patch converts the atmel-isi driver from a soc-camera driver to
>>>>>> a driver
>>>>>> that is stand-alone.
>>>>>>
>>>>>> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
>>>>>> ---
>>>>>>  drivers/media/platform/soc_camera/Kconfig     |    3 +-
>>>>>>  drivers/media/platform/soc_camera/atmel-isi.c | 1216
>>>>>> +++++++++++++++----------
>>>>>>  2 files changed, 721 insertions(+), 498 deletions(-)
>>>>>>
>>>>>> diff --git a/drivers/media/platform/soc_camera/Kconfig
>>>>>> b/drivers/media/platform/soc_camera/Kconfig
>>>>>> index 39f6641..f74e358 100644
>>>>>> --- a/drivers/media/platform/soc_camera/Kconfig
>>>>>> +++ b/drivers/media/platform/soc_camera/Kconfig
>>>>>> @@ -54,9 +54,8 @@ config VIDEO_SH_MOBILE_CEU
>>>>>>
>>>>>>  config VIDEO_ATMEL_ISI
>>>>>>      tristate "ATMEL Image Sensor Interface (ISI) support"
>>>>>> -    depends on VIDEO_DEV && SOC_CAMERA
>>>>>> +    depends on VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API && OF && HAS_DMA
>>>>>>      depends on ARCH_AT91 || COMPILE_TEST
>>>>>> -    depends on HAS_DMA
>>>>>>      select VIDEOBUF2_DMA_CONTIG
>>>>>>      ---help---
>>>>>>        This module makes the ATMEL Image Sensor Interface available
>>>>>> diff --git a/drivers/media/platform/soc_camera/atmel-isi.c
>>>>>> b/drivers/media/platform/soc_camera/atmel-isi.c
>>>>>> index 30211f6..9947acb 100644
>>>>>> --- a/drivers/media/platform/soc_camera/atmel-isi.c
>>>>>> +++ b/drivers/media/platform/soc_camera/atmel-isi.c
>>>>
>>>>
>>>>>> +
>>>>>>  static int atmel_isi_probe(struct platform_device *pdev)
>>>>>>  {
>>>>>>      int irq;
>>>>>>      struct atmel_isi *isi;
>>>>>> +    struct vb2_queue *q;
>>>>>>      struct resource *regs;
>>>>>>      int ret, i;
>>>>>> -    struct soc_camera_host *soc_host;
>>>>>>
>>>>>>      isi = devm_kzalloc(&pdev->dev, sizeof(struct atmel_isi),
>>>>>> GFP_KERNEL);
>>>>>>      if (!isi) {
>>>>>> @@ -1044,20 +1216,65 @@ static int atmel_isi_probe(struct
>>>>>> platform_device *pdev)
>>>>>>          return ret;
>>>>>>
>>>>>>      isi->active = NULL;
>>>>>> -    spin_lock_init(&isi->lock);
>>>>>> +    isi->dev = &pdev->dev;
>>>>>> +    mutex_init(&isi->lock);
>>>>>> +    spin_lock_init(&isi->irqlock);
>>>>>>      INIT_LIST_HEAD(&isi->video_buffer_list);
>>>>>>      INIT_LIST_HEAD(&isi->dma_desc_head);
>>>>>>
>>>>>> +    q = &isi->queue;
>>>>>> +
>>>>>> +    /* Initialize the top-level structure */
>>>>>> +    ret = v4l2_device_register(&pdev->dev, &isi->v4l2_dev);
>>>>>> +    if (ret)
>>>>>> +        return ret;
>>>>>> +
>>>>>> +    isi->vdev = video_device_alloc();
>>>>>> +    if (isi->vdev == NULL) {
>>>>>> +        ret = -ENOMEM;
>>>>>> +        goto err_vdev_alloc;
>>>>>> +    }
>>>>> If video device is unregistered, the ISI driver must be reloaded when
>>>>> registering a new video device.
>>>>> So '*vdev' can be replaced by 'vdev', or move the code above to
>>>>> isi_graph_notify_complete.
>>>>
>>>> I'm afraid I don't understand what you mean. Can you clarify?
>>>>
>>>
>>> If the sensor driver is defined as a module, e.g. ov7670.ko. 'insmod
>>> ov7670.ko' and 'rmmod ov7670', video_device_release will be called, and
>>> '*vdev' will be freed, when 'insmod ov7670.ko' is run again, the error
>>> will will occur, if the code above is moved to
>>> isi_graph_notify_complete, there will be no error.
>>>
>>>> Regards,
>>>>
>>>>     Hans
>>>>
>>>>>
>>>>>> +
>>>>>> +    /* video node */
>>>>>> +    isi->vdev->fops = &isi_fops;
>>>>>> +    isi->vdev->v4l2_dev = &isi->v4l2_dev;
>>>>>> +    isi->vdev->queue = &isi->queue;
>>>>>> +    strlcpy(isi->vdev->name, KBUILD_MODNAME,
>>>>>> sizeof(isi->vdev->name));
>>>>>> +    isi->vdev->release = video_device_release;
>>>>>> +    isi->vdev->ioctl_ops = &isi_ioctl_ops;
>>>>>> +    isi->vdev->lock = &isi->lock;
>>>>>> +    isi->vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE |
>>>>>> V4L2_CAP_STREAMING |
>>>>>> +        V4L2_CAP_READWRITE;
>>>>>> +    video_set_drvdata(isi->vdev, isi);
>>>>>> +
>>>>>> +    /* buffer queue */
>>>>>> +    q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
>>>>>> +    q->io_modes = VB2_MMAP | VB2_READ | VB2_DMABUF;
>>>>>> +    q->lock = &isi->lock;
>>>>>> +    q->drv_priv = isi;
>>>>>> +    q->buf_struct_size = sizeof(struct frame_buffer);
>>>>>> +    q->ops = &isi_video_qops;
>>>>>> +    q->mem_ops = &vb2_dma_contig_memops;
>>>>>> +    q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
>>>>>> +    q->min_buffers_needed = 2;
>>>>>> +    q->dev = &pdev->dev;
>>>>>> +
>>>>>> +    ret = vb2_queue_init(q);
>>>>>> +    if (ret < 0) {
>>>>>> +        dev_err(&pdev->dev, "failed to initialize VB2 queue\n");
>>>>>> +        goto err_vb2_queue;
>>>>>> +    }
>>>>>
>>>>> Regards,
>>>>>     Songjun Wu
>>>>>
>>>>>
>>>>> --
>>>>> To unsubscribe from this list: send the line "unsubscribe
>>>>> linux-media" in
>>>>> the body of a message to majordomo@vger.kernel.org
>>>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>>>

Re: [RFC PATCH 6/7] atmel-isi: remove dependency of the soc-camera framework

[Hans Verkuil]

On 10/19/2016 09:36 AM, Wu, Songjun wrote:
> 
> 
> On 10/18/2016 18:58, Hans Verkuil wrote:
>> On 10/18/16 11:21, Wu, Songjun wrote:
>>> Hi Hans,
>>>
>>> Do you have any issue on this patch?
>>
>> ENOTIME :-(
>>
>>> Could I give you some help? :)
>>
>> I would certainly help if you can make the requested change to this patch.
>>
>> Let me know if you want to do that, because in that case I'll rebase my
>> tree
>> to the latest media_tree master.
>>
> Yes, I would like to make the requested change to this patch. :)
> It seems the patch is not based on the latest media_tree master.
> Will you rebase this patch to the latest media_tree, or let me move it 
> and make the requested change based on the media_tree?

I've rebased my branch:

https://git.linuxtv.org/hverkuil/media_tree.git/log/?h=sama5d3-2

Regards,

	Hans

Re: [RFC PATCH 6/7] atmel-isi: remove dependency of the soc-camera framework

[Wu, Songjun]

On 10/19/2016 15:46, Hans Verkuil wrote:
> On 10/19/2016 09:36 AM, Wu, Songjun wrote:
>>
>>
>> On 10/18/2016 18:58, Hans Verkuil wrote:
>>> On 10/18/16 11:21, Wu, Songjun wrote:
>>>> Hi Hans,
>>>>
>>>> Do you have any issue on this patch?
>>>
>>> ENOTIME :-(
>>>
>>>> Could I give you some help? :)
>>>
>>> I would certainly help if you can make the requested change to this patch.
>>>
>>> Let me know if you want to do that, because in that case I'll rebase my
>>> tree
>>> to the latest media_tree master.
>>>
>> Yes, I would like to make the requested change to this patch. :)
>> It seems the patch is not based on the latest media_tree master.
>> Will you rebase this patch to the latest media_tree, or let me move it
>> and make the requested change based on the media_tree?
>
> I've rebased my branch:
>
> https://git.linuxtv.org/hverkuil/media_tree.git/log/?h=sama5d3-2
>
Thank you very much.
I will make the requested change based on your branch.

> Regards,
>
> 	Hans
>

Re: [RFC PATCH 6/7] atmel-isi: remove dependency of the soc-camera framework

[Hans Verkuil]

Hi Songjun,

On 10/19/2016 09:48 AM, Wu, Songjun wrote:
> 
> 
> On 10/19/2016 15:46, Hans Verkuil wrote:
>> On 10/19/2016 09:36 AM, Wu, Songjun wrote:
>>>
>>>
>>> On 10/18/2016 18:58, Hans Verkuil wrote:
>>>> On 10/18/16 11:21, Wu, Songjun wrote:
>>>>> Hi Hans,
>>>>>
>>>>> Do you have any issue on this patch?
>>>>
>>>> ENOTIME :-(
>>>>
>>>>> Could I give you some help? :)
>>>>
>>>> I would certainly help if you can make the requested change to this patch.
>>>>
>>>> Let me know if you want to do that, because in that case I'll rebase my
>>>> tree
>>>> to the latest media_tree master.
>>>>
>>> Yes, I would like to make the requested change to this patch. :)
>>> It seems the patch is not based on the latest media_tree master.
>>> Will you rebase this patch to the latest media_tree, or let me move it
>>> and make the requested change based on the media_tree?
>>
>> I've rebased my branch:
>>
>> https://git.linuxtv.org/hverkuil/media_tree.git/log/?h=sama5d3-2
>>
> Thank you very much.
> I will make the requested change based on your branch.

Did you make any progress on this? I plan on finalizing the atmel-isi driver
next week.

Regards,

	Hans

Re: [RFC PATCH 6/7] atmel-isi: remove dependency of the soc-camera framework

[Wu, Songjun]

On 11/14/2016 16:19, Hans Verkuil wrote:
> Hi Songjun,
>
> On 10/19/2016 09:48 AM, Wu, Songjun wrote:
>>
>>
>> On 10/19/2016 15:46, Hans Verkuil wrote:
>>> On 10/19/2016 09:36 AM, Wu, Songjun wrote:
>>>>
>>>>
>>>> On 10/18/2016 18:58, Hans Verkuil wrote:
>>>>> On 10/18/16 11:21, Wu, Songjun wrote:
>>>>>> Hi Hans,
>>>>>>
>>>>>> Do you have any issue on this patch?
>>>>>
>>>>> ENOTIME :-(
>>>>>
>>>>>> Could I give you some help? :)
>>>>>
>>>>> I would certainly help if you can make the requested change to this patch.
>>>>>
>>>>> Let me know if you want to do that, because in that case I'll rebase my
>>>>> tree
>>>>> to the latest media_tree master.
>>>>>
>>>> Yes, I would like to make the requested change to this patch. :)
>>>> It seems the patch is not based on the latest media_tree master.
>>>> Will you rebase this patch to the latest media_tree, or let me move it
>>>> and make the requested change based on the media_tree?
>>>
>>> I've rebased my branch:
>>>
>>> https://git.linuxtv.org/hverkuil/media_tree.git/log/?h=sama5d3-2
>>>
>> Thank you very much.
>> I will make the requested change based on your branch.
>
> Did you make any progress on this? I plan on finalizing the atmel-isi driver
> next week.
>
I checked the code, you have already modified the code according the 
comments, and I also validate the ISI driver, no errors.
You can finalize the atmel-isi driver.
Thank you very much.

> Regards,
>
> 	Hans
>