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The indexes of the devices are described within the topology file, it is a possibility that the topology encodes invalid indexes when DYNAMIC_MINORS is not enabled in kernel: #define SNDRV_MINOR_COMPRESS 2 /* 2 - 3 */ #define SNDRV_MINOR_HWDEP 4 /* 4 - 7 */ #define SNDRV_MINOR_RAWMIDI 8 /* 8 - 15 */ #define SNDRV_MINOR_PCM_PLAYBACK 16 /* 16 - 23 */ #define SNDRV_MINOR_PCM_CAPTURE 24 /* 24 - 31 */ If the topology assigns an index greater than 7 for PLAYBACK/CAPTURE PCM then there will be minor number collision. As an example: card0 creates a capture PCM with index 10 -> minor = 34 card1 creates compress device with index 0 -> minor = 34 Card1 will fail to instantiate because the minor for the compress stream is already taken. To avoid seemingly mysterious issues with card creation, select the DYNAMIC_MINORS when the topology is enabled. The other option would be to try to do out of bound index checks in case of DYNAMIC_MINOR is not enabled and do not even attempt to create the device with failing the topology load. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Link: https://lore.kernel.org/r/20210726182142.179604-1-pierre-louis.bossart@linux.intel.com Signed-off-by: Mark Brown <broonie@kernel.org>
104 lines
2.7 KiB
Plaintext
104 lines
2.7 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
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#
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# SoC audio configuration
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#
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menuconfig SND_SOC
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tristate "ALSA for SoC audio support"
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select SND_PCM
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select AC97_BUS if SND_SOC_AC97_BUS
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select SND_JACK
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select REGMAP_I2C if I2C
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select REGMAP_SPI if SPI_MASTER
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help
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If you want ASoC support, you should say Y here and also to the
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specific driver for your SoC platform below.
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ASoC provides power efficient ALSA support for embedded battery powered
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SoC based systems like PDA's, Phones and Personal Media Players.
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This ASoC audio support can also be built as a module. If so, the module
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will be called snd-soc-core.
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if SND_SOC
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config SND_SOC_AC97_BUS
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bool
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config SND_SOC_GENERIC_DMAENGINE_PCM
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bool
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select SND_DMAENGINE_PCM
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config SND_SOC_COMPRESS
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bool
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select SND_COMPRESS_OFFLOAD
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config SND_SOC_TOPOLOGY
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bool
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select SND_DYNAMIC_MINORS
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config SND_SOC_TOPOLOGY_KUNIT_TEST
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tristate "KUnit tests for SoC topology"
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depends on KUNIT
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depends on SND_SOC_TOPOLOGY
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default KUNIT_ALL_TESTS
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help
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If you want to perform tests on ALSA SoC topology support say Y here.
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This builds a module which can be later manually loaded to run KUNIT
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test cases against soc-topology.c API. This should be primarily used
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by developers to test their changes to ASoC.
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Do note that it creates fake playback devices which do not interact
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well with userspace. When running tests one may want to disable
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userspace applications such as pulseaudio, to prevent unnecessary
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problems.
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config SND_SOC_ACPI
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tristate
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# All the supported SoCs
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source "sound/soc/adi/Kconfig"
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source "sound/soc/amd/Kconfig"
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source "sound/soc/atmel/Kconfig"
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source "sound/soc/au1x/Kconfig"
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source "sound/soc/bcm/Kconfig"
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source "sound/soc/cirrus/Kconfig"
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source "sound/soc/dwc/Kconfig"
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source "sound/soc/fsl/Kconfig"
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source "sound/soc/hisilicon/Kconfig"
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source "sound/soc/jz4740/Kconfig"
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source "sound/soc/kirkwood/Kconfig"
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source "sound/soc/img/Kconfig"
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source "sound/soc/intel/Kconfig"
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source "sound/soc/mediatek/Kconfig"
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source "sound/soc/meson/Kconfig"
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source "sound/soc/mxs/Kconfig"
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source "sound/soc/pxa/Kconfig"
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source "sound/soc/qcom/Kconfig"
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source "sound/soc/rockchip/Kconfig"
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source "sound/soc/samsung/Kconfig"
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source "sound/soc/sh/Kconfig"
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source "sound/soc/sof/Kconfig"
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source "sound/soc/spear/Kconfig"
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source "sound/soc/sprd/Kconfig"
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source "sound/soc/sti/Kconfig"
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source "sound/soc/stm/Kconfig"
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source "sound/soc/sunxi/Kconfig"
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source "sound/soc/tegra/Kconfig"
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source "sound/soc/ti/Kconfig"
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source "sound/soc/uniphier/Kconfig"
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source "sound/soc/ux500/Kconfig"
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source "sound/soc/xilinx/Kconfig"
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source "sound/soc/xtensa/Kconfig"
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# Supported codecs
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source "sound/soc/codecs/Kconfig"
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# generic frame-work
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source "sound/soc/generic/Kconfig"
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endif # SND_SOC
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