linux-kernel - Re: [alsa-devel] [PATCH v1 1/2] ASoC: SOF: Add Comet Lake PCI ID

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Date:   Tue, 7 May 2019 15:26:45 -0500
From:   Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To:     "M R, Sathya Prakash" <sathya.prakash.m.r@...el.com>,
        Evan Green <evgreen@...omium.org>,
        Liam Girdwood <liam.r.girdwood@...ux.intel.com>,
        Mark Brown <broonie@...nel.org>
Cc:     Rajat Jain <rajatja@...omium.org>,
        "alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Takashi Iwai <tiwai@...e.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Ben Zhang <benzh@...omium.org>,
        "M, Naveen" <naveen.m@...el.com>
Subject: Re: [alsa-devel] [PATCH v1 1/2] ASoC: SOF: Add Comet Lake PCI ID



> On 5/6/19 5:53 PM, Evan Green wrote:
>>> Add support for Intel Comet Lake platforms by adding a new Kconfig for
>>> CometLake and the appropriate PCI ID.
> 
>> This is odd. I checked internally a few weeks back and the CML PCI ID was 9dc8, same as WHL and CNL, so we did not add a PCI ID on purpose. To the best of my knowledge SOF probes fine on CML and the known issues can be found on the SOF github [1].
> 
> The PCI ID change is seen on later production Si versions. The PCI ID is 02c8.

As I suspected, we are talking about different skews and generations of 
the chipset and a board-level change, not silicon change.

The CNL PCH-LP PCI ID is 0x9DC8, the CNL PCH-H PCI ID is 0xA348 (used 
for CoffeeLake). Both are supported by SOF.

What we are missing are the PCI IDs for CML PCH-LP (0x02C8) and CML 
PCH-H (0x06C8).

Can we respin this patchset to add support for those last two instead of 
just the -LP case?

I'll send a patch to add those IDs for the HDaudio legacy driver for 
consistency.

Thanks!
-Pierre