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Re: [PATCH] adv7511: Added mode_fixup function.

Started byCarlos Palminha <CARLOS.PALMINHA@synopsys.com>
First post2016-02-10 11:20 +0100
Last post2016-02-10 13:20 +0100
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  Re: [PATCH] adv7511: Added mode_fixup function. Carlos Palminha <CARLOS.PALMINHA@synopsys.com> - 2016-02-10 11:20 +0100
    Re: [PATCH] adv7511: Added mode_fixup function. Daniel Vetter <daniel@ffwll.ch> - 2016-02-10 13:20 +0100

#1331017 — Re: [PATCH] adv7511: Added mode_fixup function.

FromCarlos Palminha <CARLOS.PALMINHA@synopsys.com>
Date2016-02-10 11:20 +0100
SubjectRe: [PATCH] adv7511: Added mode_fixup function.
Message-ID<r0A2m-Sb-13@gated-at.bofh.it>
Hi guys,

I agree that this should be fixed in the helper library.
There are already a lot of drivers that copy/paste code and several helper functions that do not avoid it.

I will start sending some patches to fix this type of issue in several places of DRM helper functions.

Regards,
C.Palminha

On 09-02-2016 09:24, Daniel Vetter wrote:
> On Thu, Feb 04, 2016 at 09:27:24PM +0100, Lars-Peter Clausen wrote:
>> On 02/04/2016 04:22 PM, Carlos Palminha wrote:
>>> Hi guys,
>>>
>>> any feedback? patch will be accepted for adv7511 driver?
>>
>> Hi,
>>
>> Thanks for the patch, but please try to find and fix the call site that is
>> trying to invoke the callback even though it does not exist.
>>
>> This is most likely drm_i2c_encoder_mode_fixup().
> 
> Agreed, this should be fixed in the helper library, not in drivers by
> copypasting piles more dummy functions.
> -Daniel
> 
>>
>> - Lars
>>
>>>
>>> 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@synopsys.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@synopsys.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,
>>>>>
>>> _______________________________________________
>>> dri-devel mailing list
>>> dri-devel@lists.freedesktop.org
>>> http://lists.freedesktop.org/mailman/listinfo/dri-devel
>>>
>>
>> _______________________________________________
>> dri-devel mailing list
>> dri-devel@lists.freedesktop.org
>> http://lists.freedesktop.org/mailman/listinfo/dri-devel
>

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#1331111

FromDaniel Vetter <daniel@ffwll.ch>
Date2016-02-10 13:20 +0100
Message-ID<r0BUu-25C-25@gated-at.bofh.it>
In reply to#1331017
On Wed, Feb 10, 2016 at 10:19:21AM +0000, Carlos Palminha wrote:
> Hi guys,
> 
> I agree that this should be fixed in the helper library.
> There are already a lot of drivers that copy/paste code and several helper functions that do not avoid it.
> 
> I will start sending some patches to fix this type of issue in several places of DRM helper functions.

Awesome, thanks a lot for doing this.
-Daniel

> 
> Regards,
> C.Palminha
> 
> On 09-02-2016 09:24, Daniel Vetter wrote:
> > On Thu, Feb 04, 2016 at 09:27:24PM +0100, Lars-Peter Clausen wrote:
> >> On 02/04/2016 04:22 PM, Carlos Palminha wrote:
> >>> Hi guys,
> >>>
> >>> any feedback? patch will be accepted for adv7511 driver?
> >>
> >> Hi,
> >>
> >> Thanks for the patch, but please try to find and fix the call site that is
> >> trying to invoke the callback even though it does not exist.
> >>
> >> This is most likely drm_i2c_encoder_mode_fixup().
> > 
> > Agreed, this should be fixed in the helper library, not in drivers by
> > copypasting piles more dummy functions.
> > -Daniel
> > 
> >>
> >> - Lars
> >>
> >>>
> >>> 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@synopsys.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@synopsys.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,
> >>>>>
> >>> _______________________________________________
> >>> dri-devel mailing list
> >>> dri-devel@lists.freedesktop.org
> >>> http://lists.freedesktop.org/mailman/listinfo/dri-devel
> >>>
> >>
> >> _______________________________________________
> >> dri-devel mailing list
> >> dri-devel@lists.freedesktop.org
> >> http://lists.freedesktop.org/mailman/listinfo/dri-devel
> > 
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch

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