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authorPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>2019-07-29 10:51:51 -0500
committerTakashi Iwai <tiwai@suse.de>2019-07-31 15:46:02 +0200
commit8c57588313805d4e12a3d470dee3405c2236655f (patch)
tree7430de901d9b194b18cd61fcb62801bf2fef7414 /sound/hda
parent1169cbf6b98e11397715d457e42070e066325fc0 (diff)
downloadlinux-8c57588313805d4e12a3d470dee3405c2236655f.tar.bz2
ALSA: hda/intel: stop probe if DMICS are detected on Skylake+ platforms
The legacy HD-Audio driver cannot handle Skylake+ platforms with digital microphones. For those platforms, the SOF or SST drivers need to be used. This patch provides an automatic way of detecting the presence of DMICs using NHTL information reported by the BIOS. A kernel kconfig option or a kernel module parameter provide an opt-in means of stopping the probe. The kernel would then look for an alternate driver registered for the same PCI ID to probe. With this capability, distros no longer have to blacklist snd-hda-intel, but still need to make sure the SOF/SST drivers are functional by providing the relevant firmware and topology files in /lib/firmware/intel The coexistence between SOF and SST drivers and their dynamic detection is not addressed by this patch, different mechanisms need to be used, e.g. DMI-based quirks. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
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