5427c7d629
The kernel has 2 drivers for the Low Power Engine audio-block on Bay- and Cherry-Trail SoCs. The old SST driver and the new SOF driver. If both drivers are enabled then the kernel will default to using the old SST driver, unless told otherwise through the snd_intel_dspcfg.dsp_driver module-parameter. Add a boolean SND_INTEL_BYT_PREFER_SOF Kconfig option, which when set to Y will make the kernel default to the new SOF driver instead. The option defaults to n, preserving the current behavior. Making this configurable will help distributions such as Fedora: https://fedoraproject.org/w/index.php?title=Changes/SofDefaultForIntelLpe to test using SOF on BYT/CHT during the transition phase where we have both drivers (eventually the old driver and this option will be removed). Note that this drops the acpi_config_table[] containing 2 entries per ACPI hardware-id if both drivers are enabled. snd_intel_acpi_dsp_find_config() will always return the first hit, so we only need a single entry with the flags value set depending on the Kconfig settings. Suggested-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Link: https://lore.kernel.org/r/20210208135919.135600-1-hdegoede@redhat.com Signed-off-by: Takashi Iwai <tiwai@suse.de>
63 lines
1.8 KiB
Plaintext
63 lines
1.8 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
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config SND_HDA_CORE
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tristate
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select REGMAP
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config SND_HDA_DSP_LOADER
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bool
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config SND_HDA_ALIGNED_MMIO
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bool
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config SND_HDA_COMPONENT
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bool
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config SND_HDA_I915
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bool
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select SND_HDA_COMPONENT
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config SND_HDA_EXT_CORE
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tristate
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select SND_HDA_CORE
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config SND_HDA_PREALLOC_SIZE
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int "Pre-allocated buffer size for HD-audio driver"
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range 0 32768
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default 2048 if SND_DMA_SGBUF
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default 64 if !SND_DMA_SGBUF
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help
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Specifies the default pre-allocated buffer-size in kB for the
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HD-audio driver. A larger buffer (e.g. 2048) is preferred
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for systems using PulseAudio. The default 64 is chosen just
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for compatibility reasons.
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On x86 systems, the default is 2048 as a reasonable value for
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most of modern systems.
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Note that the pre-allocation size can be changed dynamically
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via a proc file (/proc/asound/card*/pcm*/sub*/prealloc), too.
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config SND_INTEL_NHLT
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bool
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# this config should be selected only for Intel ACPI platforms.
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# A fallback is provided so that the code compiles in all cases.
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config SND_INTEL_DSP_CONFIG
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tristate
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select SND_INTEL_NHLT if ACPI
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# this config should be selected only for Intel DSP platforms.
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# A fallback is provided so that the code compiles in all cases.
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config SND_INTEL_BYT_PREFER_SOF
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bool "Prefer SOF driver over SST on BY/CHT platforms"
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depends on SND_SST_ATOM_HIFI2_PLATFORM_ACPI && SND_SOC_SOF_BAYTRAIL
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default n
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help
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The kernel has 2 drivers for the Low Power Engine audio-block on
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Bay- and Cherry-Trail SoCs. The old SST driver and the new SOF
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driver. If both drivers are enabled then the kernel will default
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to using the old SST driver, unless told otherwise through the
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snd_intel_dspcfg.dsp_driver module-parameter.
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Set this option to Y to make the kernel default to the new SOF
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driver instead.
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