linux-kernel - Re: [PATCH v2 12/22] media: au0828 video remove au0828_enable_analog

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Date:	Thu, 4 Feb 2016 07:49:37 -0700
From:	Shuah Khan <shuahkh@....samsung.com>
To:	Mauro Carvalho Chehab <mchehab@....samsung.com>
Cc:	tiwai@...e.com, clemens@...isch.de, hans.verkuil@...co.com,
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	linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
	alsa-devel@...a-project.org, Shuah Khan <shuahkh@....samsung.com>
Subject: Re: [PATCH v2 12/22] media: au0828 video remove
 au0828_enable_analog_tuner()

On 02/04/2016 02:37 AM, Mauro Carvalho Chehab wrote:
> Em Wed, 03 Feb 2016 21:03:44 -0700
> Shuah Khan <shuahkh@....samsung.com> escreveu:
> 
>> Remove au0828_enable_analog_tuner() as it is
>> no longer needed because v4l2-core implements
>> common interfaces to check for media source
>> availability.
> 
> I didn't see such code at v4l2-core yet. Missing patch?

Removed linux-api from cc:

Please see Patch 10/22 for v4l2-core changes.
[PATCH v2 10/22] media: Change v4l-core to check if source is free

thanks,
-- Shuah

> 
>>
>> In addition, queue_setup() no longer needs the
>> tuner availability check since v4l2-core does it.
>>
>> Signed-off-by: Shuah Khan <shuahkh@....samsung.com>
>> ---
>>  drivers/media/usb/au0828/au0828-video.c | 61 ---------------------------------
>>  1 file changed, 61 deletions(-)
>>
>> diff --git a/drivers/media/usb/au0828/au0828-video.c b/drivers/media/usb/au0828/au0828-video.c
>> index 8c54fd2..81952c8 100644
>> --- a/drivers/media/usb/au0828/au0828-video.c
>> +++ b/drivers/media/usb/au0828/au0828-video.c
>> @@ -638,64 +638,6 @@ static inline int au0828_isoc_copy(struct au0828_dev *dev, struct urb *urb)
>>  	return rc;
>>  }
>>  
>> -static int au0828_enable_analog_tuner(struct au0828_dev *dev)
>> -{
>> -#ifdef CONFIG_MEDIA_CONTROLLER
>> -	struct media_device *mdev = dev->media_dev;
>> -	struct media_entity *source;
>> -	struct media_link *link, *found_link = NULL;
>> -	int ret, active_links = 0;
>> -
>> -	if (!mdev || !dev->decoder)
>> -		return 0;
>> -
>> -	/*
>> -	 * This will find the tuner that is connected into the decoder.
>> -	 * Technically, this is not 100% correct, as the device may be
>> -	 * using an analog input instead of the tuner. However, as we can't
>> -	 * do DVB streaming while the DMA engine is being used for V4L2,
>> -	 * this should be enough for the actual needs.
>> -	 */
>> -	list_for_each_entry(link, &dev->decoder->links, list) {
>> -		if (link->sink->entity == dev->decoder) {
>> -			found_link = link;
>> -			if (link->flags & MEDIA_LNK_FL_ENABLED)
>> -				active_links++;
>> -			break;
>> -		}
>> -	}
>> -
>> -	if (active_links == 1 || !found_link)
>> -		return 0;
>> -
>> -	source = found_link->source->entity;
>> -	list_for_each_entry(link, &source->links, list) {
>> -		struct media_entity *sink;
>> -		int flags = 0;
>> -
>> -		sink = link->sink->entity;
>> -
>> -		if (sink == dev->decoder)
>> -			flags = MEDIA_LNK_FL_ENABLED;
>> -
>> -		ret = media_entity_setup_link(link, flags);
>> -		if (ret) {
>> -			pr_err(
>> -				"Couldn't change link %s->%s to %s. Error %d\n",
>> -				source->name, sink->name,
>> -				flags ? "enabled" : "disabled",
>> -				ret);
>> -			return ret;
>> -		} else
>> -			au0828_isocdbg(
>> -				"link %s->%s was %s\n",
>> -				source->name, sink->name,
>> -				flags ? "ENABLED" : "disabled");
>> -	}
>> -#endif
>> -	return 0;
>> -}
>> -
>>  static int queue_setup(struct vb2_queue *vq,
>>  		       unsigned int *nbuffers, unsigned int *nplanes,
>>  		       unsigned int sizes[], void *alloc_ctxs[])
>> @@ -707,9 +649,6 @@ static int queue_setup(struct vb2_queue *vq,
>>  		return sizes[0] < size ? -EINVAL : 0;
>>  	*nplanes = 1;
>>  	sizes[0] = size;
>> -
>> -	au0828_enable_analog_tuner(dev);
>> -
>>  	return 0;
>>  }
>>  
> --
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> 


-- 
Shuah Khan
Sr. Linux Kernel Developer
Open Source Innovation Group
Samsung Research America (Silicon Valley)
shuahkh@....samsung.com | (970) 217-8978