linux-kernel - Re: [PATCH 2/2] soundwire: intel: transition to 3 steps initialization

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Date:   Thu, 21 May 2020 10:06:55 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     "Liao, Bard" <bard.liao@...el.com>
Cc:     Bard Liao <yung-chuan.liao@...ux.intel.com>,
        "alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "tiwai@...e.de" <tiwai@...e.de>,
        "broonie@...nel.org" <broonie@...nel.org>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "jank@...ence.com" <jank@...ence.com>,
        "srinivas.kandagatla@...aro.org" <srinivas.kandagatla@...aro.org>,
        "rander.wang@...ux.intel.com" <rander.wang@...ux.intel.com>,
        "ranjani.sridharan@...ux.intel.com" 
        <ranjani.sridharan@...ux.intel.com>,
        "hui.wang@...onical.com" <hui.wang@...onical.com>,
        "pierre-louis.bossart@...ux.intel.com" 
        <pierre-louis.bossart@...ux.intel.com>,
        "Kale, Sanyog R" <sanyog.r.kale@...el.com>,
        "Blauciak, Slawomir" <slawomir.blauciak@...el.com>,
        "Lin, Mengdong" <mengdong.lin@...el.com>
Subject: Re: [PATCH 2/2] soundwire: intel: transition to 3 steps
 initialization

On 21-05-20, 02:23, Liao, Bard wrote:
> > -----Original Message-----
> > From: Vinod Koul <vkoul@...nel.org>
> > Sent: Wednesday, May 20, 2020 9:54 PM
> > To: Bard Liao <yung-chuan.liao@...ux.intel.com>
> > Cc: alsa-devel@...a-project.org; linux-kernel@...r.kernel.org; tiwai@...e.de;
> > broonie@...nel.org; gregkh@...uxfoundation.org; jank@...ence.com;
> > srinivas.kandagatla@...aro.org; rander.wang@...ux.intel.com;
> > ranjani.sridharan@...ux.intel.com; hui.wang@...onical.com; pierre-
> > louis.bossart@...ux.intel.com; Kale, Sanyog R <sanyog.r.kale@...el.com>;
> > Blauciak, Slawomir <slawomir.blauciak@...el.com>; Lin, Mengdong
> > <mengdong.lin@...el.com>; Liao, Bard <bard.liao@...el.com>
> > Subject: Re: [PATCH 2/2] soundwire: intel: transition to 3 steps initialization
> > 
> > On 20-05-20, 03:19, Bard Liao wrote:
> > > From: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
> > >
> > > Rather than a plain-vanilla init/exit, this patch provides 3 steps in
> > > the initialization (ACPI scan, probe, startup) which makes it easier to
> > > detect platform support for SoundWire, allocate required resources as
> > > early as possible, and conversely help make the startup() callback
> > > lighter-weight with only hardware register setup.
> > 
> > Okay but can you add details in changelog on what each step would do?
> 
> Sure. Will do.
> 
> > 
> > > @@ -1134,25 +1142,15 @@ static int intel_probe(struct platform_device
> > *pdev)
> > >
> > >  	intel_pdi_ch_update(sdw);
> > >
> > > -	/* Acquire IRQ */
> > > -	ret = request_threaded_irq(sdw->link_res->irq,
> > > -				   sdw_cdns_irq, sdw_cdns_thread,
> > > -				   IRQF_SHARED, KBUILD_MODNAME, &sdw-
> > >cdns);
> > 
> > This is removed here but not added anywhere else, do we have no irq
> > after this patch?
> 
> We use a single irq for all Intel Audio DSP events and it will
> be requested in the SOF driver.

And how will the irq be propagated to sdw/cdns drivers here?

-- 
~Vinod