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ALSA: HD-Audio: SKL+: force HDaudio legacy or SKL+ driver selection

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For HDaudio and Skylake drivers, add module parameter "pci_binding"

When pci_binding == 0 (AUTO), the PCI class/subclass info is used to
select drivers based on the presence of the DSP.

pci_binding == 1 (LEGACY) forces the use of the HDAudio legacy driver,
even if the DSP is present.

pci_binding == 2 (ASOC) forces the use of the ASOC driver. The
information on the DSP presence is bypassed.

The value for the module parameter needs to be identical for both
drivers. This parameter is intended as a back-up solution if the
automatic detection fails or when the DSP usage fails. Such cases
should be reported on the alsa-devel mailing list for analysis.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Pierre-Louis Bossart 2018-12-15 14:07:23 -06:00 • committed by Takashi Iwai
parent c337104b1a
commit d82b51c855
3 changed files with 62 additions and 18 deletions
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6
include/sound/hdaudio.h
View file

@ -98,6 +98,12 @@ enum {
HDA_DEV_ASOC,
};
enum {
SND_SKL_PCI_BIND_AUTO, /* automatic selection based on pci class */
SND_SKL_PCI_BIND_LEGACY,/* bind only with legacy driver */
SND_SKL_PCI_BIND_ASOC /* bind only with ASoC driver */
};
/* direction */
enum {
HDA_INPUT, HDA_OUTPUT