linux-kernel - Re: [PATCH] adv7511: Added mode

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Date:	Thu, 4 Feb 2016 15:22:25 +0000
From:	Carlos Palminha <CARLOS.PALMINHA@...opsys.com>
To:	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Carlos Palminha <CARLOS.PALMINHA@...opsys.com>,
	David Airlie <airlied@...ux.ie>
CC:	<dri-devel@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>,
	Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>
Subject: Re: [PATCH] adv7511: Added mode_fixup function.

Hi guys,

any feedback? patch will be accepted for adv7511 driver?

Regards,
C.Palminha

On 01-02-2016 12:37, Carlos Palminha wrote:
> Hi Laurent
> 
> On 29-01-2016 17:48, Laurent Pinchart wrote:
>> Hi Carlos,
>>
>> Thank you for the patch.
>>
>> On Friday 29 January 2016 10:33:47 Carlos Palminha wrote:
>>> The mode_fixup is necessary when using it in a DRM FB driver pipeline.
>>
>> Instead of implementing stubs in encoder drivers, wouldn't it be better to 
>> make mode_fixup optional ?
> Probably you are right but i don't have enough knowledge or time to do that for the DRM framework. :(
> I limited myself to do what the other drivers already implement.
> 
> The patch is mandatory to have to the ADV working or else will get some NULL pointer crash.
> 
> Regards,
> C.Palminha
> 
>>
>>> Signed-off-by: Carlos Palminha <palminha@...opsys.com>
>>> ---
>>>  drivers/gpu/drm/i2c/adv7511.c | 8 ++++++++
>>>  1 file changed, 8 insertions(+)
>>>
>>> diff --git a/drivers/gpu/drm/i2c/adv7511.c b/drivers/gpu/drm/i2c/adv7511.c
>>> index 533d1e3..90082d2 100644
>>> --- a/drivers/gpu/drm/i2c/adv7511.c
>>> +++ b/drivers/gpu/drm/i2c/adv7511.c
>>> @@ -648,6 +648,13 @@ adv7511_encoder_detect(struct drm_encoder *encoder,
>>>  	return status;
>>>  }
>>>
>>> +static bool adv7511_encoder_mode_fixup(struct drm_encoder *encoder,
>>> +					const struct drm_display_mode *mode,
>>> +					struct drm_display_mode *adjusted_mode)
>>> +{
>>> +	return true;
>>> +}
>>> +
>>>  static int adv7511_encoder_mode_valid(struct drm_encoder *encoder,
>>>  				      struct drm_display_mode *mode)
>>>  {
>>> @@ -754,6 +761,7 @@ static void adv7511_encoder_mode_set(struct drm_encoder
>>> *encoder,
>>>
>>>  static const struct drm_encoder_slave_funcs adv7511_encoder_funcs = {
>>>  	.dpms = adv7511_encoder_dpms,
>>> +	.mode_fixup = adv7511_encoder_mode_fixup,
>>>  	.mode_valid = adv7511_encoder_mode_valid,
>>>  	.mode_set = adv7511_encoder_mode_set,
>>>  	.detect = adv7511_encoder_detect,
>>
> 
> 
> On 29-01-2016 17:48, Laurent Pinchart wrote:
>> Hi Carlos,
>>
>> Thank you for the patch.
>>
>> On Friday 29 January 2016 10:33:47 Carlos Palminha wrote:
>>> The mode_fixup is necessary when using it in a DRM FB driver pipeline.
>>
>> Instead of implementing stubs in encoder drivers, wouldn't it be better to 
>> make mode_fixup optional ?
>>
>>> Signed-off-by: Carlos Palminha <palminha@...opsys.com>
>>> ---
>>>  drivers/gpu/drm/i2c/adv7511.c | 8 ++++++++
>>>  1 file changed, 8 insertions(+)
>>>
>>> diff --git a/drivers/gpu/drm/i2c/adv7511.c b/drivers/gpu/drm/i2c/adv7511.c
>>> index 533d1e3..90082d2 100644
>>> --- a/drivers/gpu/drm/i2c/adv7511.c
>>> +++ b/drivers/gpu/drm/i2c/adv7511.c
>>> @@ -648,6 +648,13 @@ adv7511_encoder_detect(struct drm_encoder *encoder,
>>>  	return status;
>>>  }
>>>
>>> +static bool adv7511_encoder_mode_fixup(struct drm_encoder *encoder,
>>> +					const struct drm_display_mode *mode,
>>> +					struct drm_display_mode *adjusted_mode)
>>> +{
>>> +	return true;
>>> +}
>>> +
>>>  static int adv7511_encoder_mode_valid(struct drm_encoder *encoder,
>>>  				      struct drm_display_mode *mode)
>>>  {
>>> @@ -754,6 +761,7 @@ static void adv7511_encoder_mode_set(struct drm_encoder
>>> *encoder,
>>>
>>>  static const struct drm_encoder_slave_funcs adv7511_encoder_funcs = {
>>>  	.dpms = adv7511_encoder_dpms,
>>> +	.mode_fixup = adv7511_encoder_mode_fixup,
>>>  	.mode_valid = adv7511_encoder_mode_valid,
>>>  	.mode_set = adv7511_encoder_mode_set,
>>>  	.detect = adv7511_encoder_detect,
>>