[PATCH 0/6] media: i2c: ths7303 feature enhancement and cleanup

[PATCH 0/6] media: i2c: ths7303 feature enhancement and cleanup

[Lad Prabhakar]

From: Lad, Prabhakar <prabhakar.csengg@gmail.com>

This patch series enables the ths7303 driver for asynchronous probing, OF
support with some cleanup patches.

Lad, Prabhakar (6):
  media: i2c: ths7303: remove init_enable option from pdata
  ARM: davinci: dm365 evm: remove init_enable from ths7303 pdata
  media: i2c: ths7303: remove unnecessary function ths7303_setup()
  media: i2c: ths7303: make the pdata as a constant pointer
  media: i2c: ths7303: add support for asynchronous probing
  media: i2c: ths7303: add OF support

 .../devicetree/bindings/media/i2c/ths73x3.txt      |   50 +++++++++++++
 arch/arm/mach-davinci/board-dm365-evm.c            |    1 -
 drivers/media/i2c/ths7303.c                        |   78 ++++++++++++-------
 include/media/ths7303.h                            |    2 -
 4 files changed, 99 insertions(+), 32 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/media/i2c/ths73x3.txt

-- 
1.7.4.1

[PATCH 1/6] media: i2c: ths7303: remove init_enable option from pdata

[Lad Prabhakar]

From: Lad, Prabhakar <prabhakar.csengg@gmail.com>

This patch removes init_enable option from pdata, the init_enable
was intended that the device should start streaming video immediately
but ideally the bridge drivers should call s_stream explicitly for such
devices to start video.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Cc: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Mauro Carvalho Chehab <mchehab@redhat.com>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
Cc: Sakari Ailus <sakari.ailus@iki.fi>
Cc: linux-kernel@vger.kernel.org
Cc: davinci-linux-open-source@linux.davincidsp.com
---
 drivers/media/i2c/ths7303.c |    4 +---
 include/media/ths7303.h     |    2 --
 2 files changed, 1 insertions(+), 5 deletions(-)

diff --git a/drivers/media/i2c/ths7303.c b/drivers/media/i2c/ths7303.c
index 65853ee..8cddcd0 100644
--- a/drivers/media/i2c/ths7303.c
+++ b/drivers/media/i2c/ths7303.c
@@ -356,9 +356,7 @@ static int ths7303_setup(struct v4l2_subdev *sd)
 	int ret;
 	u8 mask;
 
-	state->stream_on = pdata->init_enable;
-
-	mask = state->stream_on ? 0xff : 0xf8;
+	mask = 0xf8;
 
 	ret = ths7303_write(sd, THS7303_CHANNEL_1, pdata->ch_1 & mask);
 	if (ret)
diff --git a/include/media/ths7303.h b/include/media/ths7303.h
index 980ec51..a7b4929 100644
--- a/include/media/ths7303.h
+++ b/include/media/ths7303.h
@@ -30,13 +30,11 @@
  * @ch_1: Bias value for channel one.
  * @ch_2: Bias value for channel two.
  * @ch_3: Bias value for channel three.
- * @init_enable: initalize on init.
  */
 struct ths7303_platform_data {
 	u8 ch_1;
 	u8 ch_2;
 	u8 ch_3;
-	u8 init_enable;
 };
 
 #endif
-- 
1.7.4.1

Re: [PATCH 1/6] media: i2c: ths7303: remove init_enable option from pdata

[Sakari Ailus]

Hi Prabhakar,

Thanks for the patch!

On Wed, May 15, 2013 at 05:27:17PM +0530, Lad Prabhakar wrote:
> diff --git a/drivers/media/i2c/ths7303.c b/drivers/media/i2c/ths7303.c
> index 65853ee..8cddcd0 100644
> --- a/drivers/media/i2c/ths7303.c
> +++ b/drivers/media/i2c/ths7303.c
> @@ -356,9 +356,7 @@ static int ths7303_setup(struct v4l2_subdev *sd)
>  	int ret;
>  	u8 mask;
>  
> -	state->stream_on = pdata->init_enable;
> -
> -	mask = state->stream_on ? 0xff : 0xf8;
> +	mask = 0xf8;

You can assign mask in declaration. It'd be nice to have a human-readable
name for the mask, too.

-- 
Kind regards,

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

Re: [PATCH 1/6] media: i2c: ths7303: remove init_enable option from pdata

[Prabhakar Lad]

Hi Sakari,

Thanks for the review.

On Fri, May 17, 2013 at 4:07 AM, Sakari Ailus <sakari.ailus@iki.fi> wrote:
> Hi Prabhakar,
>
> Thanks for the patch!
>
> On Wed, May 15, 2013 at 05:27:17PM +0530, Lad Prabhakar wrote:
>> diff --git a/drivers/media/i2c/ths7303.c b/drivers/media/i2c/ths7303.c
>> index 65853ee..8cddcd0 100644
>> --- a/drivers/media/i2c/ths7303.c
>> +++ b/drivers/media/i2c/ths7303.c
>> @@ -356,9 +356,7 @@ static int ths7303_setup(struct v4l2_subdev *sd)
>>       int ret;
>>       u8 mask;
>>
>> -     state->stream_on = pdata->init_enable;
>> -
>> -     mask = state->stream_on ? 0xff : 0xf8;
>> +     mask = 0xf8;
>
> You can assign mask in declaration. It'd be nice to have a human-readable
> name for the mask, too.
>
This function gets removed in the preceding patch of this series.

Regards,
--Prabhakar Lad

[PATCH 2/6] ARM: davinci: dm365 evm: remove init_enable from ths7303 pdata

From: Lad, Prabhakar <prabhakar.csengg@gmail.com>

remove init_enable from ths7303 pdata as it is no longer exists.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Cc: Sekhar Nori <nsekhar@ti.com>
Cc: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Mauro Carvalho Chehab <mchehab@redhat.com>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
Cc: Sakari Ailus <sakari.ailus@iki.fi>
Cc: linux-kernel@vger.kernel.org
Cc: davinci-linux-open-source@linux.davincidsp.com
Cc: linux-arm-kernel@lists.infradead.org
---
 arch/arm/mach-davinci/board-dm365-evm.c |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)

diff --git a/arch/arm/mach-davinci/board-dm365-evm.c b/arch/arm/mach-davinci/board-dm365-evm.c
index 2a66743..4e02ae7 100644
--- a/arch/arm/mach-davinci/board-dm365-evm.c
+++ b/arch/arm/mach-davinci/board-dm365-evm.c
@@ -510,7 +510,6 @@ struct ths7303_platform_data ths7303_pdata = {
 	.ch_1 = 3,
 	.ch_2 = 3,
 	.ch_3 = 3,
-	.init_enable = 1,
 };
 
 static struct amp_config_info vpbe_amp = {
-- 
1.7.4.1

[PATCH 2/6] ARM: davinci: dm365 evm: remove init_enable from ths7303 pdata

[Lad Prabhakar]

From: Lad, Prabhakar <prabhakar.csengg@gmail.com>

remove init_enable from ths7303 pdata as it is no longer exists.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Cc: Sekhar Nori <nsekhar@ti.com>
Cc: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Mauro Carvalho Chehab <mchehab@redhat.com>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
Cc: Sakari Ailus <sakari.ailus@iki.fi>
Cc: linux-kernel at vger.kernel.org
Cc: davinci-linux-open-source at linux.davincidsp.com
Cc: linux-arm-kernel at lists.infradead.org
---
 arch/arm/mach-davinci/board-dm365-evm.c |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)

diff --git a/arch/arm/mach-davinci/board-dm365-evm.c b/arch/arm/mach-davinci/board-dm365-evm.c
index 2a66743..4e02ae7 100644
--- a/arch/arm/mach-davinci/board-dm365-evm.c
+++ b/arch/arm/mach-davinci/board-dm365-evm.c
@@ -510,7 +510,6 @@ struct ths7303_platform_data ths7303_pdata = {
 	.ch_1 = 3,
 	.ch_2 = 3,
 	.ch_3 = 3,
-	.init_enable = 1,
 };
 
 static struct amp_config_info vpbe_amp = {
-- 
1.7.4.1

Re: [PATCH 2/6] ARM: davinci: dm365 evm: remove init_enable from ths7303 pdata

[Laurent Pinchart]

Hi Prabhakar,

Thank you for the patch.

On Wednesday 15 May 2013 17:27:18 Lad Prabhakar wrote:
> From: Lad, Prabhakar <prabhakar.csengg@gmail.com>
> 
> remove init_enable from ths7303 pdata as it is no longer exists.

You should move this before 1/6, otherwise you will break bisection.

> Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
> Cc: Sekhar Nori <nsekhar@ti.com>
> Cc: Hans Verkuil <hans.verkuil@cisco.com>
> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Cc: Mauro Carvalho Chehab <mchehab@redhat.com>
> Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
> Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
> Cc: Sakari Ailus <sakari.ailus@iki.fi>
> Cc: linux-kernel@vger.kernel.org
> Cc: davinci-linux-open-source@linux.davincidsp.com
> Cc: linux-arm-kernel@lists.infradead.org
> ---
>  arch/arm/mach-davinci/board-dm365-evm.c |    1 -
>  1 files changed, 0 insertions(+), 1 deletions(-)
> 
> diff --git a/arch/arm/mach-davinci/board-dm365-evm.c
> b/arch/arm/mach-davinci/board-dm365-evm.c index 2a66743..4e02ae7 100644
> --- a/arch/arm/mach-davinci/board-dm365-evm.c
> +++ b/arch/arm/mach-davinci/board-dm365-evm.c
> @@ -510,7 +510,6 @@ struct ths7303_platform_data ths7303_pdata = {
>  	.ch_1 = 3,
>  	.ch_2 = 3,
>  	.ch_3 = 3,
> -	.init_enable = 1,
>  };
> 
>  static struct amp_config_info vpbe_amp = {
-- 
Regards,

Laurent Pinchart

[PATCH 2/6] ARM: davinci: dm365 evm: remove init_enable from ths7303 pdata

[Laurent Pinchart]

Hi Prabhakar,

Thank you for the patch.

On Wednesday 15 May 2013 17:27:18 Lad Prabhakar wrote:
> From: Lad, Prabhakar <prabhakar.csengg@gmail.com>
> 
> remove init_enable from ths7303 pdata as it is no longer exists.

You should move this before 1/6, otherwise you will break bisection.

> Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
> Cc: Sekhar Nori <nsekhar@ti.com>
> Cc: Hans Verkuil <hans.verkuil@cisco.com>
> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Cc: Mauro Carvalho Chehab <mchehab@redhat.com>
> Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
> Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
> Cc: Sakari Ailus <sakari.ailus@iki.fi>
> Cc: linux-kernel at vger.kernel.org
> Cc: davinci-linux-open-source at linux.davincidsp.com
> Cc: linux-arm-kernel at lists.infradead.org
> ---
>  arch/arm/mach-davinci/board-dm365-evm.c |    1 -
>  1 files changed, 0 insertions(+), 1 deletions(-)
> 
> diff --git a/arch/arm/mach-davinci/board-dm365-evm.c
> b/arch/arm/mach-davinci/board-dm365-evm.c index 2a66743..4e02ae7 100644
> --- a/arch/arm/mach-davinci/board-dm365-evm.c
> +++ b/arch/arm/mach-davinci/board-dm365-evm.c
> @@ -510,7 +510,6 @@ struct ths7303_platform_data ths7303_pdata = {
>  	.ch_1 = 3,
>  	.ch_2 = 3,
>  	.ch_3 = 3,
> -	.init_enable = 1,
>  };
> 
>  static struct amp_config_info vpbe_amp = {
-- 
Regards,

Laurent Pinchart

Re: [PATCH 2/6] ARM: davinci: dm365 evm: remove init_enable from ths7303 pdata

[Prabhakar Lad]

Hi Laurent,

Thanks for the review.

On Wed, May 15, 2013 at 5:35 PM, Laurent Pinchart
<laurent.pinchart@ideasonboard.com> wrote:
> Hi Prabhakar,
>
> Thank you for the patch.
>
> On Wednesday 15 May 2013 17:27:18 Lad Prabhakar wrote:
>> From: Lad, Prabhakar <prabhakar.csengg@gmail.com>
>>
>> remove init_enable from ths7303 pdata as it is no longer exists.
>
> You should move this before 1/6, otherwise you will break bisection.
>
OK I'll fix it in next version.

Regards,
--Prabhakar Lad

[PATCH 2/6] ARM: davinci: dm365 evm: remove init_enable from ths7303 pdata

[Prabhakar Lad]

Hi Laurent,

Thanks for the review.

On Wed, May 15, 2013 at 5:35 PM, Laurent Pinchart
<laurent.pinchart@ideasonboard.com> wrote:
> Hi Prabhakar,
>
> Thank you for the patch.
>
> On Wednesday 15 May 2013 17:27:18 Lad Prabhakar wrote:
>> From: Lad, Prabhakar <prabhakar.csengg@gmail.com>
>>
>> remove init_enable from ths7303 pdata as it is no longer exists.
>
> You should move this before 1/6, otherwise you will break bisection.
>
OK I'll fix it in next version.

Regards,
--Prabhakar Lad

Re: [PATCH 2/6] ARM: davinci: dm365 evm: remove init_enable from ths7303 pdata

[Prabhakar Lad]

Hi Laurent,

On Wed, May 15, 2013 at 5:41 PM, Prabhakar Lad
<prabhakar.csengg@gmail.com> wrote:
> Hi Laurent,
>
> Thanks for the review.
>
> On Wed, May 15, 2013 at 5:35 PM, Laurent Pinchart
> <laurent.pinchart@ideasonboard.com> wrote:
>> Hi Prabhakar,
>>
>> Thank you for the patch.
>>
>> On Wednesday 15 May 2013 17:27:18 Lad Prabhakar wrote:
>>> From: Lad, Prabhakar <prabhakar.csengg@gmail.com>
>>>
>>> remove init_enable from ths7303 pdata as it is no longer exists.
>>
>> You should move this before 1/6, otherwise you will break bisection.
>>
How about I just reshuffles while issuing a pull rather than resending
the whole series ?

Regards,
--Prabhakar Lad

[PATCH 2/6] ARM: davinci: dm365 evm: remove init_enable from ths7303 pdata

[Prabhakar Lad]

Hi Laurent,

On Wed, May 15, 2013 at 5:41 PM, Prabhakar Lad
<prabhakar.csengg@gmail.com> wrote:
> Hi Laurent,
>
> Thanks for the review.
>
> On Wed, May 15, 2013 at 5:35 PM, Laurent Pinchart
> <laurent.pinchart@ideasonboard.com> wrote:
>> Hi Prabhakar,
>>
>> Thank you for the patch.
>>
>> On Wednesday 15 May 2013 17:27:18 Lad Prabhakar wrote:
>>> From: Lad, Prabhakar <prabhakar.csengg@gmail.com>
>>>
>>> remove init_enable from ths7303 pdata as it is no longer exists.
>>
>> You should move this before 1/6, otherwise you will break bisection.
>>
How about I just reshuffles while issuing a pull rather than resending
the whole series ?

Regards,
--Prabhakar Lad

Re: [PATCH 2/6] ARM: davinci: dm365 evm: remove init_enable from ths7303 pdata

[Laurent Pinchart]

Hi Prabhakar,

On Thursday 16 May 2013 17:18:00 Prabhakar Lad wrote:
> On Wed, May 15, 2013 at 5:41 PM, Prabhakar Lad wrote:
> > On Wed, May 15, 2013 at 5:35 PM, Laurent Pinchart wrote:
> >> On Wednesday 15 May 2013 17:27:18 Lad Prabhakar wrote:
> >>> From: Lad, Prabhakar <prabhakar.csengg@gmail.com>
> >>> 
> >>> remove init_enable from ths7303 pdata as it is no longer exists.
> >> 
> >> You should move this before 1/6, otherwise you will break bisection.
> 
> How about I just reshuffles while issuing a pull rather than resending
> the whole series ?

As long as you don't forget to do so, sure :-)

-- 
Regards,

Laurent Pinchart

[PATCH 2/6] ARM: davinci: dm365 evm: remove init_enable from ths7303 pdata

[Laurent Pinchart]

Hi Prabhakar,

On Thursday 16 May 2013 17:18:00 Prabhakar Lad wrote:
> On Wed, May 15, 2013 at 5:41 PM, Prabhakar Lad wrote:
> > On Wed, May 15, 2013 at 5:35 PM, Laurent Pinchart wrote:
> >> On Wednesday 15 May 2013 17:27:18 Lad Prabhakar wrote:
> >>> From: Lad, Prabhakar <prabhakar.csengg@gmail.com>
> >>> 
> >>> remove init_enable from ths7303 pdata as it is no longer exists.
> >> 
> >> You should move this before 1/6, otherwise you will break bisection.
> 
> How about I just reshuffles while issuing a pull rather than resending
> the whole series ?

As long as you don't forget to do so, sure :-)

-- 
Regards,

Laurent Pinchart

Re: [PATCH 2/6] ARM: davinci: dm365 evm: remove init_enable from ths7303 pdata

[Prabhakar Lad]

Hi Sekhar,

On Wed, May 15, 2013 at 5:27 PM, Lad Prabhakar
<prabhakar.csengg@gmail.com> wrote:
> From: Lad, Prabhakar <prabhakar.csengg@gmail.com>
>
> remove init_enable from ths7303 pdata as it is no longer exists.
>
Can you please ack this patch, as this patch is intended to go via media tree.

Regards,
--Prabhakar Lad

[PATCH 2/6] ARM: davinci: dm365 evm: remove init_enable from ths7303 pdata

[Prabhakar Lad]

Hi Sekhar,

On Wed, May 15, 2013 at 5:27 PM, Lad Prabhakar
<prabhakar.csengg@gmail.com> wrote:
> From: Lad, Prabhakar <prabhakar.csengg@gmail.com>
>
> remove init_enable from ths7303 pdata as it is no longer exists.
>
Can you please ack this patch, as this patch is intended to go via media tree.

Regards,
--Prabhakar Lad

[PATCH 3/6] media: i2c: ths7303: remove unnecessary function ths7303_setup()

[Lad Prabhakar]

From: Lad, Prabhakar <prabhakar.csengg@gmail.com>

the ths7303_setup() was doing the same thing as ths7303_setval()
except that ths7303_setval() sets it to some particular mode.
This patch removes ths7303_setup() function and calls ths7303_setval()
in the probe setting the device to 480I_576I filter mode in the probe.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Cc: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Mauro Carvalho Chehab <mchehab@redhat.com>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
Cc: Sakari Ailus <sakari.ailus@iki.fi>
Cc: linux-kernel@vger.kernel.org
Cc: davinci-linux-open-source@linux.davincidsp.com
---
 drivers/media/i2c/ths7303.c |   31 ++++---------------------------
 1 files changed, 4 insertions(+), 27 deletions(-)

diff --git a/drivers/media/i2c/ths7303.c b/drivers/media/i2c/ths7303.c
index 8cddcd0..af06187c 100644
--- a/drivers/media/i2c/ths7303.c
+++ b/drivers/media/i2c/ths7303.c
@@ -349,30 +349,6 @@ static const struct v4l2_subdev_ops ths7303_ops = {
 	.video 	= &ths7303_video_ops,
 };
 
-static int ths7303_setup(struct v4l2_subdev *sd)
-{
-	struct ths7303_state *state = to_state(sd);
-	struct ths7303_platform_data *pdata = &state->pdata;
-	int ret;
-	u8 mask;
-
-	mask = 0xf8;
-
-	ret = ths7303_write(sd, THS7303_CHANNEL_1, pdata->ch_1 & mask);
-	if (ret)
-		return ret;
-
-	ret = ths7303_write(sd, THS7303_CHANNEL_2, pdata->ch_2 & mask);
-	if (ret)
-		return ret;
-
-	ret = ths7303_write(sd, THS7303_CHANNEL_3, pdata->ch_3 & mask);
-	if (ret)
-		return ret;
-
-	return 0;
-}
-
 static int ths7303_probe(struct i2c_client *client,
 			const struct i2c_device_id *id)
 {
@@ -402,9 +378,10 @@ static int ths7303_probe(struct i2c_client *client,
 	/* store the driver data to differntiate the chip */
 	state->driver_data = (int)id->driver_data;
 
-	if (ths7303_setup(sd) < 0) {
-		v4l_err(client, "init failed\n");
-		return -EIO;
+	/* set to default 480I_576I filter mode */
+	if (ths7303_setval(sd, THS7303_FILTER_MODE_480I_576I) < 0) {
+		v4l_err(client, "Setting to 480I_576I filter mode failed!\n");
+		return -EINVAL;
 	}
 
 	return 0;
-- 
1.7.4.1

[PATCH 4/6] media: i2c: ths7303: make the pdata as a constant pointer

[Lad Prabhakar]

From: Lad, Prabhakar <prabhakar.csengg@gmail.com>

generally the pdata needs to be a constant pointer in the device
state structure. This patch makes the pdata as a constant pointer
and alongside returns -EINVAL when pdata is NULL.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Cc: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Mauro Carvalho Chehab <mchehab@redhat.com>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
Cc: Sakari Ailus <sakari.ailus@iki.fi>
Cc: linux-kernel@vger.kernel.org
Cc: davinci-linux-open-source@linux.davincidsp.com
---
 drivers/media/i2c/ths7303.c |   15 ++++++++-------
 1 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/drivers/media/i2c/ths7303.c b/drivers/media/i2c/ths7303.c
index af06187c..b954195 100644
--- a/drivers/media/i2c/ths7303.c
+++ b/drivers/media/i2c/ths7303.c
@@ -35,7 +35,7 @@
 
 struct ths7303_state {
 	struct v4l2_subdev		sd;
-	struct ths7303_platform_data	pdata;
+	const struct ths7303_platform_data *pdata;
 	struct v4l2_bt_timings		bt;
 	int std_id;
 	int stream_on;
@@ -89,7 +89,7 @@ int ths7303_setval(struct v4l2_subdev *sd, enum ths7303_filter_mode mode)
 {
 	struct i2c_client *client = v4l2_get_subdevdata(sd);
 	struct ths7303_state *state = to_state(sd);
-	struct ths7303_platform_data *pdata = &state->pdata;
+	const struct ths7303_platform_data *pdata = state->pdata;
 	u8 val, sel = 0;
 	int err, disable = 0;
 
@@ -356,6 +356,11 @@ static int ths7303_probe(struct i2c_client *client,
 	struct ths7303_state *state;
 	struct v4l2_subdev *sd;
 
+	if (pdata == NULL) {
+		dev_err(&client->dev, "No platform data\n");
+		return -EINVAL;
+	}
+
 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 		return -ENODEV;
 
@@ -367,11 +372,7 @@ static int ths7303_probe(struct i2c_client *client,
 	if (!state)
 		return -ENOMEM;
 
-	if (!pdata)
-		v4l_warn(client, "No platform data, using default data!\n");
-	else
-		state->pdata = *pdata;
-
+	state->pdata = pdata;
 	sd = &state->sd;
 	v4l2_i2c_subdev_init(sd, client, &ths7303_ops);
 
-- 
1.7.4.1

[PATCH 5/6] media: i2c: ths7303: add support for asynchronous probing

[Lad Prabhakar]

From: Lad, Prabhakar <prabhakar.csengg@gmail.com>

Both synchronous and asynchronous ths7303 subdevice probing is supported by
this patch.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Cc: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Mauro Carvalho Chehab <mchehab@redhat.com>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
Cc: Sakari Ailus <sakari.ailus@iki.fi>
Cc: linux-kernel@vger.kernel.org
Cc: davinci-linux-open-source@linux.davincidsp.com
---
 drivers/media/i2c/ths7303.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/drivers/media/i2c/ths7303.c b/drivers/media/i2c/ths7303.c
index b954195..4f772a2 100644
--- a/drivers/media/i2c/ths7303.c
+++ b/drivers/media/i2c/ths7303.c
@@ -26,6 +26,7 @@
 #include <linux/slab.h>
 
 #include <media/ths7303.h>
+#include <media/v4l2-async.h>
 #include <media/v4l2-chip-ident.h>
 #include <media/v4l2-device.h>
 
@@ -355,6 +356,7 @@ static int ths7303_probe(struct i2c_client *client,
 	struct ths7303_platform_data *pdata = client->dev.platform_data;
 	struct ths7303_state *state;
 	struct v4l2_subdev *sd;
+	int ret;
 
 	if (pdata == NULL) {
 		dev_err(&client->dev, "No platform data\n");
@@ -385,13 +387,20 @@ static int ths7303_probe(struct i2c_client *client,
 		return -EINVAL;
 	}
 
+	state->sd.dev = &client->dev;
+	ret = v4l2_async_register_subdev(&state->sd);
+	if (ret)
+		return ret;
+
 	return 0;
 }
 
 static int ths7303_remove(struct i2c_client *client)
 {
 	struct v4l2_subdev *sd = i2c_get_clientdata(client);
+	struct ths7303_state *ths7303 = to_state(sd);
 
+	v4l2_async_unregister_subdev(&ths7303->sd);
 	v4l2_device_unregister_subdev(sd);
 
 	return 0;
-- 
1.7.4.1

[PATCH 6/6] media: i2c: ths7303: add OF support

[Lad Prabhakar]

From: Lad, Prabhakar <prabhakar.csengg@gmail.com>

add OF support for the ths7303 driver.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Cc: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Mauro Carvalho Chehab <mchehab@redhat.com>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
Cc: Sakari Ailus <sakari.ailus@iki.fi>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Rob Landley <rob@landley.net>
Cc: devicetree-discuss@lists.ozlabs.org
Cc: linux-doc@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: davinci-linux-open-source@linux.davincidsp.com
---
 .../devicetree/bindings/media/i2c/ths73x3.txt      |   50 ++++++++++++++++++++
 drivers/media/i2c/ths7303.c                        |   37 ++++++++++++++-
 2 files changed, 86 insertions(+), 1 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/media/i2c/ths73x3.txt

diff --git a/Documentation/devicetree/bindings/media/i2c/ths73x3.txt b/Documentation/devicetree/bindings/media/i2c/ths73x3.txt
new file mode 100644
index 0000000..62f63e8
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/i2c/ths73x3.txt
@@ -0,0 +1,50 @@
+* Texas Instruments THS7303/THS7353 video amplifier
+
+The THS7303/THS7353 device is a low power 3-channel integrated video buffer
+which can be configured individually via i2c for all the functions which makes
+it flexible for any application. It incorporates a selectable fifth-order
+Butterworth filter to eliminate data converter images.
+
+Required Properties :
+- compatible : value should be either one among the following
+	(a) "ti,ths7303" for ths7303 video amplifier.
+	(b) "ti,ths7353" for ths7353 video amplifier.
+
+- ti,ths73x3-ch1-bias: Bias value for channel 1.
+
+- ti,ths73x3-ch2-bias: Bias value for channel 2.
+
+- ti,ths73x3-ch3-bias: Bias value for channel 3.
+
+Bias values for channel-1/2/3 can be following (values default to zero):-
+ - 0: Disable Channel - Conserves Power
+ - 1: Channel On - Mute Function - No Output
+ - 2: Channel On - DC Bias Select
+ - 3: Channel On - DC Bias + 250 mV Offset Select
+ - 4: Channel On - AC Bias Select
+ - 5: Channel On - Sync Tip Clam with low bias
+ - 6: Channel On - Sync Tip Clam with mid bias
+ - 7: Channel On - Sync Tip Clam with high bias
+
+For further reading of port node refer Documentation/devicetree/bindings/media/
+video-interfaces.txt.
+
+Example:
+
+	i2c0@1c22000 {
+		...
+		...
+		ths7303@2c {
+			compatible = "ti,ths7303";
+			reg = <0x2c>;
+
+			port {
+				ths7303_1: endpoint {
+					ti,ths73x3-ch1-bias = <3>;
+					ti,ths73x3-ch2-bias = <3>;
+					ti,ths73x3-ch3-bias = <3>;
+				};
+			};
+		};
+		...
+	};
diff --git a/drivers/media/i2c/ths7303.c b/drivers/media/i2c/ths7303.c
index 4f772a2..a648313 100644
--- a/drivers/media/i2c/ths7303.c
+++ b/drivers/media/i2c/ths7303.c
@@ -29,6 +29,7 @@
 #include <media/v4l2-async.h>
 #include <media/v4l2-chip-ident.h>
 #include <media/v4l2-device.h>
+#include <media/v4l2-of.h>
 
 #define THS7303_CHANNEL_1	1
 #define THS7303_CHANNEL_2	2
@@ -350,10 +351,34 @@ static const struct v4l2_subdev_ops ths7303_ops = {
 	.video 	= &ths7303_video_ops,
 };
 
+static struct ths7303_platform_data *
+ths7303_get_pdata(struct i2c_client *client)
+{
+	struct ths7303_platform_data *pdata;
+	struct device_node *endpoint;
+
+	if (!IS_ENABLED(CONFIG_OF) || !client->dev.of_node)
+		return client->dev.platform_data;
+
+	endpoint = v4l2_of_get_next_endpoint(client->dev.of_node, NULL);
+	if (!endpoint)
+		return NULL;
+
+	pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
+	if (!pdata)
+		return NULL;
+
+	of_property_read_u8(endpoint, "ti,ths73x3-ch1-bias", &pdata->ch_1);
+	of_property_read_u8(endpoint, "ti,ths73x3-ch2-bias", &pdata->ch_2);
+	of_property_read_u8(endpoint, "ti,ths73x3-ch3-bias", &pdata->ch_3);
+
+	return pdata;
+}
+
 static int ths7303_probe(struct i2c_client *client,
 			const struct i2c_device_id *id)
 {
-	struct ths7303_platform_data *pdata = client->dev.platform_data;
+	struct ths7303_platform_data *pdata = ths7303_get_pdata(client);
 	struct ths7303_state *state;
 	struct v4l2_subdev *sd;
 	int ret;
@@ -414,8 +439,18 @@ static const struct i2c_device_id ths7303_id[] = {
 
 MODULE_DEVICE_TABLE(i2c, ths7303_id);
 
+#if IS_ENABLED(CONFIG_OF)
+static const struct of_device_id ths73x3_of_match[] = {
+	{ .compatible = "ti,ths7303", },
+	{ .compatible = "ti,ths7353", },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, ths73x3_of_match);
+#endif
+
 static struct i2c_driver ths7303_driver = {
 	.driver = {
+		.of_match_table = of_match_ptr(ths73x3_of_match),
 		.owner	= THIS_MODULE,
 		.name	= "ths73x3",
 	},
-- 
1.7.4.1

Re: [PATCH 0/6] media: i2c: ths7303 feature enhancement and cleanup

[Hans Verkuil]

On Wed 15 May 2013 13:57:16 Lad Prabhakar wrote:
> From: Lad, Prabhakar <prabhakar.csengg@gmail.com>
> 
> This patch series enables the ths7303 driver for asynchronous probing, OF
> support with some cleanup patches.
> 
> Lad, Prabhakar (6):
>   media: i2c: ths7303: remove init_enable option from pdata
>   ARM: davinci: dm365 evm: remove init_enable from ths7303 pdata
>   media: i2c: ths7303: remove unnecessary function ths7303_setup()
>   media: i2c: ths7303: make the pdata as a constant pointer
>   media: i2c: ths7303: add support for asynchronous probing
>   media: i2c: ths7303: add OF support

Can you post this again in the right order (swapping the first two patches)
and preferably with an ack from the mach-davinci maintainer?

Once I have that I can take in the first four patches and I can take the
final two patches once the async support is merged.

Regards,

	Hans

Re: [PATCH 0/6] media: i2c: ths7303 feature enhancement and cleanup

[Prabhakar Lad]

Hi Hans,

On Thu, May 23, 2013 at 2:21 PM, Hans Verkuil <hverkuil@xs4all.nl> wrote:
> On Wed 15 May 2013 13:57:16 Lad Prabhakar wrote:
>> From: Lad, Prabhakar <prabhakar.csengg@gmail.com>
>>
>> This patch series enables the ths7303 driver for asynchronous probing, OF
>> support with some cleanup patches.
>>
>> Lad, Prabhakar (6):
>>   media: i2c: ths7303: remove init_enable option from pdata
>>   ARM: davinci: dm365 evm: remove init_enable from ths7303 pdata
>>   media: i2c: ths7303: remove unnecessary function ths7303_setup()
>>   media: i2c: ths7303: make the pdata as a constant pointer
>>   media: i2c: ths7303: add support for asynchronous probing
>>   media: i2c: ths7303: add OF support
>
> Can you post this again in the right order (swapping the first two patches)
> and preferably with an ack from the mach-davinci maintainer?
>
> Once I have that I can take in the first four patches and I can take the
> final two patches once the async support is merged.
>
Ok I'll do it today.

Regards,
--Prabhakar Lad