diff mbox

[3/3] media: atmel-isi: remove mck back compatiable code as we don't need it

Message ID 1425531661-20040-4-git-send-email-josh.wu@atmel.com (mailing list archive)
State Superseded, archived
Delegated to: Guennadi Liakhovetski
Headers

Commit Message

Josh Wu March 5, 2015, 5:01 a.m. UTC 
The master clock should handled by sensor itself.

Signed-off-by: Josh Wu <josh.wu@atmel.com>
---

 drivers/media/platform/soc_camera/atmel-isi.c | 32 ---------------------------
 1 file changed, 32 deletions(-)

Comments

Laurent Pinchart March 5, 2015, 10:41 a.m. UTC | #1 
Hi Josh,

Thank you for the patch.

On Thursday 05 March 2015 13:01:01 Josh Wu wrote:
> The master clock should handled by sensor itself.

I like that :-)

> Signed-off-by: Josh Wu <josh.wu@atmel.com>
> ---
> 
>  drivers/media/platform/soc_camera/atmel-isi.c | 32 ------------------------
>  1 file changed, 32 deletions(-)
> 
> diff --git a/drivers/media/platform/soc_camera/atmel-isi.c
> b/drivers/media/platform/soc_camera/atmel-isi.c index 4a384f1..50375ce
> 100644
> --- a/drivers/media/platform/soc_camera/atmel-isi.c
> +++ b/drivers/media/platform/soc_camera/atmel-isi.c
> @@ -83,8 +83,6 @@ struct atmel_isi {
>  	struct completion		complete;
>  	/* ISI peripherial clock */
>  	struct clk			*pclk;
> -	/* ISI_MCK, feed to camera sensor to generate pixel clock */
> -	struct clk			*mck;
>  	unsigned int			irq;
> 
>  	struct isi_platform_data	pdata;
> @@ -725,26 +723,12 @@ static void isi_camera_remove_device(struct
> soc_camera_device *icd) /* Called with .host_lock held */
>  static int isi_camera_clock_start(struct soc_camera_host *ici)
>  {
> -	struct atmel_isi *isi = ici->priv;
> -	int ret;
> -
> -	if (!IS_ERR(isi->mck)) {
> -		ret = clk_prepare_enable(isi->mck);
> -		if (ret) {
> -			return ret;
> -		}
> -	}
> -
>  	return 0;

Would it make sense to make the clock_start and clock_stop operations optional 
in the soc-camera core ?

>  }
> 
>  /* Called with .host_lock held */
>  static void isi_camera_clock_stop(struct soc_camera_host *ici)
>  {
> -	struct atmel_isi *isi = ici->priv;
> -
> -	if (!IS_ERR(isi->mck))
> -		clk_disable_unprepare(isi->mck);
>  }
> 
>  static unsigned int isi_camera_poll(struct file *file, poll_table *pt)
> @@ -894,7 +878,6 @@ static int atmel_isi_probe_dt(struct atmel_isi *isi,
> 
>  	/* Default settings for ISI */
>  	isi->pdata.full_mode = 1;
> -	isi->pdata.mck_hz = ISI_DEFAULT_MCLK_FREQ;
>  	isi->pdata.frate = ISI_CFG1_FRATE_CAPTURE_ALL;
> 
>  	np = of_graph_get_next_endpoint(np, NULL);
> @@ -970,21 +953,6 @@ static int atmel_isi_probe(struct platform_device
> *pdev) INIT_LIST_HEAD(&isi->video_buffer_list);
>  	INIT_LIST_HEAD(&isi->dma_desc_head);
> 
> -	/* ISI_MCK is the sensor master clock. It should be handled by the
> -	 * sensor driver directly, as the ISI has no use for that clock. Make
> -	 * the clock optional here while platforms transition to the correct
> -	 * model.
> -	 */
> -	isi->mck = devm_clk_get(dev, "isi_mck");
> -	if (!IS_ERR(isi->mck)) {
> -		/* Set ISI_MCK's frequency, it should be faster than pixel
> -		 * clock.
> -		 */
> -		ret = clk_set_rate(isi->mck, isi->pdata.mck_hz);
> -		if (ret < 0)
> -			return ret;
> -	}
> -
>  	isi->p_fb_descriptors = dma_alloc_coherent(&pdev->dev,
>  				sizeof(struct fbd) * MAX_BUFFER_NUM,
>  				&isi->fb_descriptors_phys,
Josh Wu March 6, 2015, 10:13 a.m. UTC | #2 
On 3/5/2015 6:41 PM, Laurent Pinchart wrote:
> Hi Josh,
>
> Thank you for the patch.
>
> On Thursday 05 March 2015 13:01:01 Josh Wu wrote:
>> The master clock should handled by sensor itself.
> I like that :-)
>
>> Signed-off-by: Josh Wu <josh.wu@atmel.com>
>> ---
>>
>>   drivers/media/platform/soc_camera/atmel-isi.c | 32 ------------------------
>>   1 file changed, 32 deletions(-)
>>
>> diff --git a/drivers/media/platform/soc_camera/atmel-isi.c
>> b/drivers/media/platform/soc_camera/atmel-isi.c index 4a384f1..50375ce
>> 100644
>> --- a/drivers/media/platform/soc_camera/atmel-isi.c
>> +++ b/drivers/media/platform/soc_camera/atmel-isi.c
>> @@ -83,8 +83,6 @@ struct atmel_isi {
>>   	struct completion		complete;
>>   	/* ISI peripherial clock */
>>   	struct clk			*pclk;
>> -	/* ISI_MCK, feed to camera sensor to generate pixel clock */
>> -	struct clk			*mck;
>>   	unsigned int			irq;
>>
>>   	struct isi_platform_data	pdata;
>> @@ -725,26 +723,12 @@ static void isi_camera_remove_device(struct
>> soc_camera_device *icd) /* Called with .host_lock held */
>>   static int isi_camera_clock_start(struct soc_camera_host *ici)
>>   {
>> -	struct atmel_isi *isi = ici->priv;
>> -	int ret;
>> -
>> -	if (!IS_ERR(isi->mck)) {
>> -		ret = clk_prepare_enable(isi->mck);
>> -		if (ret) {
>> -			return ret;
>> -		}
>> -	}
>> -
>>   	return 0;
> Would it make sense to make the clock_start and clock_stop operations optional
> in the soc-camera core ?
I agree. For those camera host which don't provide master clock for 
sensor, clock_start and clock_stop should be optional.

Hi, Guennadi

Do you agree with this?

Best Regards,
Josh Wu

>
>>   }
>>
>>   /* Called with .host_lock held */
>>   static void isi_camera_clock_stop(struct soc_camera_host *ici)
>>   {
>> -	struct atmel_isi *isi = ici->priv;
>> -
>> -	if (!IS_ERR(isi->mck))
>> -		clk_disable_unprepare(isi->mck);
>>   }
>>
>>   static unsigned int isi_camera_poll(struct file *file, poll_table *pt)
>> @@ -894,7 +878,6 @@ static int atmel_isi_probe_dt(struct atmel_isi *isi,
>>
>>   	/* Default settings for ISI */
>>   	isi->pdata.full_mode = 1;
>> -	isi->pdata.mck_hz = ISI_DEFAULT_MCLK_FREQ;
>>   	isi->pdata.frate = ISI_CFG1_FRATE_CAPTURE_ALL;
>>
>>   	np = of_graph_get_next_endpoint(np, NULL);
>> @@ -970,21 +953,6 @@ static int atmel_isi_probe(struct platform_device
>> *pdev) INIT_LIST_HEAD(&isi->video_buffer_list);
>>   	INIT_LIST_HEAD(&isi->dma_desc_head);
>>
>> -	/* ISI_MCK is the sensor master clock. It should be handled by the
>> -	 * sensor driver directly, as the ISI has no use for that clock. Make
>> -	 * the clock optional here while platforms transition to the correct
>> -	 * model.
>> -	 */
>> -	isi->mck = devm_clk_get(dev, "isi_mck");
>> -	if (!IS_ERR(isi->mck)) {
>> -		/* Set ISI_MCK's frequency, it should be faster than pixel
>> -		 * clock.
>> -		 */
>> -		ret = clk_set_rate(isi->mck, isi->pdata.mck_hz);
>> -		if (ret < 0)
>> -			return ret;
>> -	}
>> -
>>   	isi->p_fb_descriptors = dma_alloc_coherent(&pdev->dev,
>>   				sizeof(struct fbd) * MAX_BUFFER_NUM,
>>   				&isi->fb_descriptors_phys,

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Guennadi Liakhovetski March 6, 2015, 8:25 p.m. UTC | #3 
Hi Josh, Laurent,

On Fri, 6 Mar 2015, Josh Wu wrote:

> On 3/5/2015 6:41 PM, Laurent Pinchart wrote:
> > Hi Josh,
> > 
> > Thank you for the patch.
> > 
> > On Thursday 05 March 2015 13:01:01 Josh Wu wrote:
> > > The master clock should handled by sensor itself.
> > I like that :-)
> > 
> > > Signed-off-by: Josh Wu <josh.wu@atmel.com>
> > > ---
> > > 
> > >   drivers/media/platform/soc_camera/atmel-isi.c | 32
> > > ------------------------
> > >   1 file changed, 32 deletions(-)
> > > 
> > > diff --git a/drivers/media/platform/soc_camera/atmel-isi.c
> > > b/drivers/media/platform/soc_camera/atmel-isi.c index 4a384f1..50375ce
> > > 100644
> > > --- a/drivers/media/platform/soc_camera/atmel-isi.c
> > > +++ b/drivers/media/platform/soc_camera/atmel-isi.c
> > > @@ -83,8 +83,6 @@ struct atmel_isi {
> > >   	struct completion		complete;
> > >   	/* ISI peripherial clock */
> > >   	struct clk			*pclk;
> > > -	/* ISI_MCK, feed to camera sensor to generate pixel clock */
> > > -	struct clk			*mck;
> > >   	unsigned int			irq;
> > > 
> > >   	struct isi_platform_data	pdata;
> > > @@ -725,26 +723,12 @@ static void isi_camera_remove_device(struct
> > > soc_camera_device *icd) /* Called with .host_lock held */
> > >   static int isi_camera_clock_start(struct soc_camera_host *ici)
> > >   {
> > > -	struct atmel_isi *isi = ici->priv;
> > > -	int ret;
> > > -
> > > -	if (!IS_ERR(isi->mck)) {
> > > -		ret = clk_prepare_enable(isi->mck);
> > > -		if (ret) {
> > > -			return ret;
> > > -		}
> > > -	}
> > > -
> > >   	return 0;
> > Would it make sense to make the clock_start and clock_stop operations
> > optional
> > in the soc-camera core ?
> I agree. For those camera host which don't provide master clock for sensor,
> clock_start and clock_stop should be optional.
> 
> Hi, Guennadi
> 
> Do you agree with this?

Yes, sure, we can do this. Would anyone like to prepare a patch?

Thanks
Guennadi
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Laurent Pinchart March 8, 2015, 12:28 a.m. UTC | #4 
On Friday 06 March 2015 21:25:36 Guennadi Liakhovetski wrote:
> On Fri, 6 Mar 2015, Josh Wu wrote:
> > On 3/5/2015 6:41 PM, Laurent Pinchart wrote:
> >> On Thursday 05 March 2015 13:01:01 Josh Wu wrote:
> >>> The master clock should handled by sensor itself.
> >> 
> >> I like that :-)
> >> 
> >>> Signed-off-by: Josh Wu <josh.wu@atmel.com>
> >>> ---
> >>> 
> >>>   drivers/media/platform/soc_camera/atmel-isi.c | 32 -------------------
> >>>   1 file changed, 32 deletions(-)
> >>> 
> >>> diff --git a/drivers/media/platform/soc_camera/atmel-isi.c
> >>> b/drivers/media/platform/soc_camera/atmel-isi.c index 4a384f1..50375ce
> >>> 100644
> >>> --- a/drivers/media/platform/soc_camera/atmel-isi.c
> >>> +++ b/drivers/media/platform/soc_camera/atmel-isi.c
> >>> @@ -83,8 +83,6 @@ struct atmel_isi {
> >>> 
> >>>   	struct completion		complete;
> >>>   	/* ISI peripherial clock */
> >>>   	struct clk			*pclk;
> >>> 
> >>> -	/* ISI_MCK, feed to camera sensor to generate pixel clock */
> >>> -	struct clk			*mck;
> >>> 
> >>>   	unsigned int			irq;
> >>>   	
> >>>   	struct isi_platform_data	pdata;
> >>> 
> >>> @@ -725,26 +723,12 @@ static void isi_camera_remove_device(struct
> >>> soc_camera_device *icd) /* Called with .host_lock held */
> >>> 
> >>>   static int isi_camera_clock_start(struct soc_camera_host *ici)
> >>>   {
> >>> 
> >>> -	struct atmel_isi *isi = ici->priv;
> >>> -	int ret;
> >>> -
> >>> -	if (!IS_ERR(isi->mck)) {
> >>> -		ret = clk_prepare_enable(isi->mck);
> >>> -		if (ret) {
> >>> -			return ret;
> >>> -		}
> >>> -	}
> >>> -
> >>> 
> >>>   	return 0;
> >> 
> >> Would it make sense to make the clock_start and clock_stop operations
> >> optional in the soc-camera core ?
> > 
> > I agree. For those camera host which don't provide master clock for
> > sensor, clock_start and clock_stop should be optional.
> > 
> > Hi, Guennadi
> > 
> > Do you agree with this?
> 
> Yes, sure, we can do this. Would anyone like to prepare a patch?

Josh, would you like to do that, or should I give it a go ?
Josh Wu March 9, 2015, 1:33 a.m. UTC | #5 
Hi, Laurent

On 3/8/2015 8:28 AM, Laurent Pinchart wrote:
> On Friday 06 March 2015 21:25:36 Guennadi Liakhovetski wrote:
>> On Fri, 6 Mar 2015, Josh Wu wrote:
>>> On 3/5/2015 6:41 PM, Laurent Pinchart wrote:
>>>> On Thursday 05 March 2015 13:01:01 Josh Wu wrote:
>>>>> The master clock should handled by sensor itself.
>>>> I like that :-)
>>>>
>>>>> Signed-off-by: Josh Wu <josh.wu@atmel.com>
>>>>> ---
>>>>>
>>>>>    drivers/media/platform/soc_camera/atmel-isi.c | 32 -------------------
>>>>>    1 file changed, 32 deletions(-)
>>>>>
>>>>> diff --git a/drivers/media/platform/soc_camera/atmel-isi.c
>>>>> b/drivers/media/platform/soc_camera/atmel-isi.c index 4a384f1..50375ce
>>>>> 100644
>>>>> --- a/drivers/media/platform/soc_camera/atmel-isi.c
>>>>> +++ b/drivers/media/platform/soc_camera/atmel-isi.c
>>>>> @@ -83,8 +83,6 @@ struct atmel_isi {
>>>>>
>>>>>    	struct completion		complete;
>>>>>    	/* ISI peripherial clock */
>>>>>    	struct clk			*pclk;
>>>>>
>>>>> -	/* ISI_MCK, feed to camera sensor to generate pixel clock */
>>>>> -	struct clk			*mck;
>>>>>
>>>>>    	unsigned int			irq;
>>>>>    	
>>>>>    	struct isi_platform_data	pdata;
>>>>>
>>>>> @@ -725,26 +723,12 @@ static void isi_camera_remove_device(struct
>>>>> soc_camera_device *icd) /* Called with .host_lock held */
>>>>>
>>>>>    static int isi_camera_clock_start(struct soc_camera_host *ici)
>>>>>    {
>>>>>
>>>>> -	struct atmel_isi *isi = ici->priv;
>>>>> -	int ret;
>>>>> -
>>>>> -	if (!IS_ERR(isi->mck)) {
>>>>> -		ret = clk_prepare_enable(isi->mck);
>>>>> -		if (ret) {
>>>>> -			return ret;
>>>>> -		}
>>>>> -	}
>>>>> -
>>>>>
>>>>>    	return 0;
>>>> Would it make sense to make the clock_start and clock_stop operations
>>>> optional in the soc-camera core ?
>>> I agree. For those camera host which don't provide master clock for
>>> sensor, clock_start and clock_stop should be optional.
>>>
>>> Hi, Guennadi
>>>
>>> Do you agree with this?
>> Yes, sure, we can do this. Would anyone like to prepare a patch?
> Josh, would you like to do that, or should I give it a go ?
>

Yes, you can do that if you have time. ;-)

Best Regards,
Josh Wu
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diff mbox

Patch

diff --git a/drivers/media/platform/soc_camera/atmel-isi.c b/drivers/media/platform/soc_camera/atmel-isi.c
index 4a384f1..50375ce 100644
--- a/drivers/media/platform/soc_camera/atmel-isi.c
+++ b/drivers/media/platform/soc_camera/atmel-isi.c
@@ -83,8 +83,6 @@  struct atmel_isi {
 	struct completion		complete;
 	/* ISI peripherial clock */
 	struct clk			*pclk;
-	/* ISI_MCK, feed to camera sensor to generate pixel clock */
-	struct clk			*mck;
 	unsigned int			irq;
 
 	struct isi_platform_data	pdata;
@@ -725,26 +723,12 @@  static void isi_camera_remove_device(struct soc_camera_device *icd)
 /* Called with .host_lock held */
 static int isi_camera_clock_start(struct soc_camera_host *ici)
 {
-	struct atmel_isi *isi = ici->priv;
-	int ret;
-
-	if (!IS_ERR(isi->mck)) {
-		ret = clk_prepare_enable(isi->mck);
-		if (ret) {
-			return ret;
-		}
-	}
-
 	return 0;
 }
 
 /* Called with .host_lock held */
 static void isi_camera_clock_stop(struct soc_camera_host *ici)
 {
-	struct atmel_isi *isi = ici->priv;
-
-	if (!IS_ERR(isi->mck))
-		clk_disable_unprepare(isi->mck);
 }
 
 static unsigned int isi_camera_poll(struct file *file, poll_table *pt)
@@ -894,7 +878,6 @@  static int atmel_isi_probe_dt(struct atmel_isi *isi,
 
 	/* Default settings for ISI */
 	isi->pdata.full_mode = 1;
-	isi->pdata.mck_hz = ISI_DEFAULT_MCLK_FREQ;
 	isi->pdata.frate = ISI_CFG1_FRATE_CAPTURE_ALL;
 
 	np = of_graph_get_next_endpoint(np, NULL);
@@ -970,21 +953,6 @@  static int atmel_isi_probe(struct platform_device *pdev)
 	INIT_LIST_HEAD(&isi->video_buffer_list);
 	INIT_LIST_HEAD(&isi->dma_desc_head);
 
-	/* ISI_MCK is the sensor master clock. It should be handled by the
-	 * sensor driver directly, as the ISI has no use for that clock. Make
-	 * the clock optional here while platforms transition to the correct
-	 * model.
-	 */
-	isi->mck = devm_clk_get(dev, "isi_mck");
-	if (!IS_ERR(isi->mck)) {
-		/* Set ISI_MCK's frequency, it should be faster than pixel
-		 * clock.
-		 */
-		ret = clk_set_rate(isi->mck, isi->pdata.mck_hz);
-		if (ret < 0)
-			return ret;
-	}
-
 	isi->p_fb_descriptors = dma_alloc_coherent(&pdev->dev,
 				sizeof(struct fbd) * MAX_BUFFER_NUM,
 				&isi->fb_descriptors_phys,