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Message-ID: <20160209114228.70539d24@recife.lan>
Date:	Tue, 9 Feb 2016 11:42:28 -0200
From:	Mauro Carvalho Chehab <mchehab@....samsung.com>
To:	Shuah Khan <shuahkh@....samsung.com>
Cc:	tiwai@...e.com, clemens@...isch.de, hans.verkuil@...co.com,
	laurent.pinchart@...asonboard.com, sakari.ailus@...ux.intel.com,
	javier@....samsung.com, pawel@...iak.com, m.szyprowski@...sung.com,
	kyungmin.park@...sung.com, perex@...ex.cz, arnd@...db.de,
	dan.carpenter@...cle.com, tvboxspy@...il.com, crope@....fi,
	ruchandani.tina@...il.com, corbet@....net, chehabrafael@...il.com,
	k.kozlowski@...sung.com, stefanr@...6.in-berlin.de,
	inki.dae@...sung.com, jh1009.sung@...sung.com,
	elfring@...rs.sourceforge.net, prabhakar.csengg@...il.com,
	sw0312.kim@...sung.com, p.zabel@...gutronix.de,
	ricardo.ribalda@...il.com, labbott@...oraproject.org,
	pierre-louis.bossart@...ux.intel.com, ricard.wanderlof@...s.com,
	julian@...st.de, takamichiho@...il.com, dominic.sacre@....de,
	misterpib@...il.com, daniel@...que.org, gtmkramer@...all.nl,
	normalperson@...t.net, joe@...po.co.uk, linuxbugs@...tgam.net,
	johan@...ud.se, klock.android@...il.com, nenggun.kim@...sung.com,
	j.anaszewski@...sung.com, geliangtang@....com,
	linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
	alsa-devel@...a-project.org
Subject: Re: [PATCH v2 20/22] media: au0828 add enable, disable source
 handlers

Em Mon, 08 Feb 2016 16:00:26 -0700
Shuah Khan <shuahkh@....samsung.com> escreveu:

> >>> +	ret = __media_entity_pipeline_start(entity, pipe);
> >>> +	if (ret) {
> >>> +		pr_err("Start Pipeline: %s->%s Error %d\n",
> >>> +			source->name, entity->name, ret);
> >>> +		ret = __media_entity_setup_link(found_link, 0);
> >>> +		pr_err("Deactive link Error %d\n", ret);
> >>> +		goto end;
> >>> +	}  
> >>
> >> Hmm... isn't it to early to activate the pipeline here? My original
> >> guess is that, on the analog side, this should happen only at the stream
> >> on code. Wouldn't this break apps like mythTV?  
> 
> On analog side, there are a few ioctls that
> change the configuration on the tuner way
> before stream on step. Is there a reason to
> separate the setup_link() and pipeline_start()
> steps? I can separate these two steps, but I
> am not really seeing the reason for that.

I'm actually ok with that, provided that it won't break existing
apps. Did you test it with MythTV?

Regards,
Mauro

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