linux-kernel - next-20151208 - CONFIG_SND_HDA

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Message-ID: <8943.1449632798@turing-police.cc.vt.edu>
Date:	Tue, 08 Dec 2015 22:46:38 -0500
From:	Valdis Kletnieks <Valdis.Kletnieks@...edu>
To:	Takashi Iwai <tiwai@...e.de>
Cc:	alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Subject: next-20151208 - CONFIG_SND_HDA_I915

I'm experiencing a spot of trouble with this commit:

commit aad730d0704545ad97654bd929b0aba05adb1436
Author: Takashi Iwai <tiwai@...e.de>
Date:   Mon Dec 2 13:33:57 2013 +0100

    ALSA: hda - Always do delayed probes for HD-audio devices

That adds some code:

#ifndef CONFIG_SND_HDA_I915
	if (chip->driver_caps & AZX_DCAPS_I915_POWERWELL)
		dev_err(card->dev, "Haswell must build in CONFIG_SND_HDA_I915\n");

"Oh, bother" -- Winnie the Pooh

So I go looking how to fix this, and 'make menuconfig' tells me:

Symbol: SND_HDA_I915 [=n]                                                                                             x  
  x Type  : boolean                                                                                                       x  
  x   Defined at sound/hda/Kconfig:8                                                                                      x  
  x   Depends on: SOUND [=y] && !M68K && !UML && SND [=y] && DRM_I915 [=n] && SND_HDA_CORE [=y]

And why is DRM_I915=n?

# lspci | grep NV
01:00.0 VGA compatible controller: NVIDIA Corporation GF108GLM [NVS 5200M] (rev a1)

Because this Dell laptop has NVidia graphics onboard, and no sign of I915
graphics that needs I915 DRM.

I think the infrastructure that you're trying to re-use from DRM_I915 needs
to be moved to another symbol which can be SELECT/DEPEND by both DRM_I915
and SND_HSA_I915.

Comments/suggestions?

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