[alsa-devel] [PATCH v4 0/5] ALSA/HDA: abort probe when DMICs are detected
This is the second take on same problem of detecting when the HDaudio legacy driver can be used and when the SST or SOF drivers are required.
The previous attempt based on a the PCI Class information was a resounding failure and broke audio on Linus' laptop, so we need additional information to avoid enabling a DSP-based driver without a good reason to do so.
This patchset suggests the use of the NHLT information which *in theory* exposes DMIC endpoints. The legacy HDaudio driver cannot handle DMICs and will not provide any capture capabilities. Since it's typically the first one to probe due to the Makefile order, aborting the probe will let the PCI subsystem look for the next driver which hopefully will support this capability.
I tested this patch on 5 devices (SKL, KBL, APL, GLK, WHL), three without DMICs and two with, and the detection seems to work as planned. Additional testing by Canonical and Endless folks did not expose any issues.
Changes since v3 (Feedback from Cezary) Code cleanups (spaces and unnecessary inits) Flipped test statement to return on errors and reduce indentation Removed ACPI leak by adding missing ACPI_FREE()
Changes since v2 (Feedback from Takahi and Cezary) Added comment in Kconfig to alert the user to the dependency on ACPI
Changes since v1 (Feedback from Takashi): Squashed patch3 in patch2 Changed log to dbg_info Fixed module parameter handling
Changes since RFC: Cosmetic code improvements Moved intel-nhlt.h to include/sound Moved intel-nhlt.c to sound/hda Removed SOC prefixes Added full-support for vendor-defined geometries Added Kconfig and kernel module parameter to opt-in
Pierre-Louis Bossart (5): ASoC: Intel: Skylake: move NHLT header to common directory ALSA: hda: move parts of NHLT code to new module ALSA: hda: intel-nhlt: handle NHLT VENDOR_DEFINED DMIC geometry ASoC: Intel: Skylake: use common NHLT module ALSA: hda/intel: stop probe if DMICS are detected on Skylake+ platforms
.../skl-nhlt.h => include/sound/intel-nhlt.h | 51 +++++++-- sound/hda/Kconfig | 5 + sound/hda/Makefile | 3 + sound/hda/intel-nhlt.c | 107 ++++++++++++++++++ sound/pci/hda/Kconfig | 10 ++ sound/pci/hda/hda_intel.c | 34 ++++++ sound/soc/intel/Kconfig | 1 + sound/soc/intel/skylake/skl-nhlt.c | 91 +-------------- sound/soc/intel/skylake/skl-ssp-clk.c | 1 + sound/soc/intel/skylake/skl-topology.c | 1 + sound/soc/intel/skylake/skl.c | 12 +- sound/soc/intel/skylake/skl.h | 4 - 12 files changed, 212 insertions(+), 108 deletions(-) rename sound/soc/intel/skylake/skl-nhlt.h => include/sound/intel-nhlt.h (65%) create mode 100644 sound/hda/intel-nhlt.c
Prepare move from NHLT code to common directory, starting with header.
Signed-off-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com --- sound/soc/intel/skylake/skl-nhlt.h => include/sound/intel-nhlt.h | 0 sound/soc/intel/skylake/skl-nhlt.c | 1 + sound/soc/intel/skylake/skl-ssp-clk.c | 1 + sound/soc/intel/skylake/skl-topology.c | 1 + sound/soc/intel/skylake/skl.h | 1 - 5 files changed, 3 insertions(+), 1 deletion(-) rename sound/soc/intel/skylake/skl-nhlt.h => include/sound/intel-nhlt.h (100%)
diff --git a/sound/soc/intel/skylake/skl-nhlt.h b/include/sound/intel-nhlt.h similarity index 100% rename from sound/soc/intel/skylake/skl-nhlt.h rename to include/sound/intel-nhlt.h diff --git a/sound/soc/intel/skylake/skl-nhlt.c b/sound/soc/intel/skylake/skl-nhlt.c index 1132109cb992..aabc5d71650e 100644 --- a/sound/soc/intel/skylake/skl-nhlt.c +++ b/sound/soc/intel/skylake/skl-nhlt.c @@ -9,6 +9,7 @@ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ #include <linux/pci.h> +#include <sound/intel-nhlt.h> #include "skl.h" #include "skl-i2s.h"
diff --git a/sound/soc/intel/skylake/skl-ssp-clk.c b/sound/soc/intel/skylake/skl-ssp-clk.c index 5bb6e40d4d3e..5bfcd46452f9 100644 --- a/sound/soc/intel/skylake/skl-ssp-clk.c +++ b/sound/soc/intel/skylake/skl-ssp-clk.c @@ -11,6 +11,7 @@ #include <linux/platform_device.h> #include <linux/clk-provider.h> #include <linux/clkdev.h> +#include <sound/intel-nhlt.h> #include "skl.h" #include "skl-ssp-clk.h" #include "skl-topology.h" diff --git a/sound/soc/intel/skylake/skl-topology.c b/sound/soc/intel/skylake/skl-topology.c index 6241e35213af..f8a501cf5fbd 100644 --- a/sound/soc/intel/skylake/skl-topology.c +++ b/sound/soc/intel/skylake/skl-topology.c @@ -12,6 +12,7 @@ #include <linux/types.h> #include <linux/firmware.h> #include <linux/uuid.h> +#include <sound/intel-nhlt.h> #include <sound/soc.h> #include <sound/soc-topology.h> #include <uapi/sound/snd_sst_tokens.h> diff --git a/sound/soc/intel/skylake/skl.h b/sound/soc/intel/skylake/skl.h index 6070666a6392..928e8115a1a7 100644 --- a/sound/soc/intel/skylake/skl.h +++ b/sound/soc/intel/skylake/skl.h @@ -16,7 +16,6 @@ #include <sound/hdaudio_ext.h> #include <sound/hda_codec.h> #include <sound/soc.h> -#include "skl-nhlt.h" #include "skl-ssp-clk.h"
#define SKL_SUSPEND_DELAY 2000
Move parts of the code outside of the Skylake driver to help detect the presence of DMICs (which are not supported by the HDaudio legacy driver).
No functionality change (except for the removal of useless OR operations), only indentation and checkpatch fixes, making sure that the code compiles without ACPI and fixing an ACPI leak
Signed-off-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com --- include/sound/intel-nhlt.h | 41 ++++++++++++--- sound/hda/Kconfig | 5 ++ sound/hda/Makefile | 3 ++ sound/hda/intel-nhlt.c | 103 +++++++++++++++++++++++++++++++++++++ 4 files changed, 144 insertions(+), 8 deletions(-) create mode 100644 sound/hda/intel-nhlt.c
diff --git a/include/sound/intel-nhlt.h b/include/sound/intel-nhlt.h index f85fbf9c7ce4..857922f03931 100644 --- a/include/sound/intel-nhlt.h +++ b/include/sound/intel-nhlt.h @@ -1,18 +1,17 @@ /* SPDX-License-Identifier: GPL-2.0-only */ /* - * skl-nhlt.h - Intel HDA Platform NHLT header + * intel-nhlt.h - Intel HDA Platform NHLT header * - * Copyright (C) 2015 Intel Corp - * Author: Sanjiv Kumar sanjiv.kumar@intel.com - * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - * - * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * Copyright (c) 2015-2019 Intel Corporation */ -#ifndef __SKL_NHLT_H__ -#define __SKL_NHLT_H__ + +#ifndef __INTEL_NHLT_H__ +#define __INTEL_NHLT_H__
#include <linux/acpi.h>
+#if IS_ENABLED(CONFIG_ACPI) && IS_ENABLED(CONFIG_SND_INTEL_NHLT) + struct wav_fmt { u16 fmt_tag; u16 channels; @@ -116,4 +115,30 @@ enum { NHLT_MIC_ARRAY_VENDOR_DEFINED = 0xf, };
+struct nhlt_acpi_table *intel_nhlt_init(struct device *dev); + +void intel_nhlt_free(struct nhlt_acpi_table *addr); + +int intel_nhlt_get_dmic_geo(struct device *dev, struct nhlt_acpi_table *nhlt); + +#else + +struct nhlt_acpi_table; + +static inline struct nhlt_acpi_table *intel_nhlt_init(struct device *dev) +{ + return NULL; +} + +static inline void intel_nhlt_free(struct nhlt_acpi_table *addr) +{ +} + +static inline int intel_nhlt_get_dmic_geo(struct device *dev, + struct nhlt_acpi_table *nhlt) +{ + return 0; +} +#endif + #endif diff --git a/sound/hda/Kconfig b/sound/hda/Kconfig index f6feced15f17..9ccbcb5a06bd 100644 --- a/sound/hda/Kconfig +++ b/sound/hda/Kconfig @@ -29,3 +29,8 @@ config SND_HDA_PREALLOC_SIZE
Note that the pre-allocation size can be changed dynamically via a proc file (/proc/asound/card*/pcm*/sub*/prealloc), too. + +config SND_INTEL_NHLT + tristate + # this config should be selected only for Intel ACPI platforms. + # A fallback is provided so that the code compiles in all cases. \ No newline at end of file diff --git a/sound/hda/Makefile b/sound/hda/Makefile index 2160202e2dc1..8560f6ef1b19 100644 --- a/sound/hda/Makefile +++ b/sound/hda/Makefile @@ -13,3 +13,6 @@ obj-$(CONFIG_SND_HDA_CORE) += snd-hda-core.o
#extended hda obj-$(CONFIG_SND_HDA_EXT_CORE) += ext/ + +snd-intel-nhlt-objs := intel-nhlt.o +obj-$(CONFIG_SND_INTEL_NHLT) += snd-intel-nhlt.o diff --git a/sound/hda/intel-nhlt.c b/sound/hda/intel-nhlt.c new file mode 100644 index 000000000000..7a62e03ba407 --- /dev/null +++ b/sound/hda/intel-nhlt.c @@ -0,0 +1,103 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2015-2019 Intel Corporation + +#include <linux/acpi.h> +#include <sound/intel-nhlt.h> + +#define NHLT_ACPI_HEADER_SIG "NHLT" + +/* Unique identification for getting NHLT blobs */ +static guid_t osc_guid = + GUID_INIT(0xA69F886E, 0x6CEB, 0x4594, + 0xA4, 0x1F, 0x7B, 0x5D, 0xCE, 0x24, 0xC5, 0x53); + +struct nhlt_acpi_table *intel_nhlt_init(struct device *dev) +{ + acpi_handle handle; + union acpi_object *obj; + struct nhlt_resource_desc *nhlt_ptr; + struct nhlt_acpi_table *nhlt_table = NULL; + + handle = ACPI_HANDLE(dev); + if (!handle) { + dev_err(dev, "Didn't find ACPI_HANDLE\n"); + return NULL; + } + + obj = acpi_evaluate_dsm(handle, &osc_guid, 1, 1, NULL); + + if (!obj) + return NULL; + + if (obj->type != ACPI_TYPE_BUFFER) { + dev_dbg(dev, "No NHLT table found\n"); + ACPI_FREE(obj); + return NULL; + } + + nhlt_ptr = (struct nhlt_resource_desc *)obj->buffer.pointer; + if (nhlt_ptr->length) + nhlt_table = (struct nhlt_acpi_table *) + memremap(nhlt_ptr->min_addr, nhlt_ptr->length, + MEMREMAP_WB); + ACPI_FREE(obj); + if (nhlt_table && + (strncmp(nhlt_table->header.signature, + NHLT_ACPI_HEADER_SIG, + strlen(NHLT_ACPI_HEADER_SIG)) != 0)) { + memunmap(nhlt_table); + dev_err(dev, "NHLT ACPI header signature incorrect\n"); + return NULL; + } + return nhlt_table; +} +EXPORT_SYMBOL_GPL(intel_nhlt_init); + +void intel_nhlt_free(struct nhlt_acpi_table *nhlt) +{ + memunmap((void *)nhlt); +} +EXPORT_SYMBOL_GPL(intel_nhlt_free); + +int intel_nhlt_get_dmic_geo(struct device *dev, struct nhlt_acpi_table *nhlt) +{ + struct nhlt_endpoint *epnt; + struct nhlt_dmic_array_config *cfg; + unsigned int dmic_geo = 0; + u8 j; + + if (!nhlt) + return 0; + + epnt = (struct nhlt_endpoint *)nhlt->desc; + + for (j = 0; j < nhlt->endpoint_count; j++) { + if (epnt->linktype == NHLT_LINK_DMIC) { + cfg = (struct nhlt_dmic_array_config *) + (epnt->config.caps); + switch (cfg->array_type) { + case NHLT_MIC_ARRAY_2CH_SMALL: + case NHLT_MIC_ARRAY_2CH_BIG: + dmic_geo = MIC_ARRAY_2CH; + break; + + case NHLT_MIC_ARRAY_4CH_1ST_GEOM: + case NHLT_MIC_ARRAY_4CH_L_SHAPED: + case NHLT_MIC_ARRAY_4CH_2ND_GEOM: + dmic_geo = MIC_ARRAY_4CH; + break; + + default: + dev_warn(dev, "undefined DMIC array_type 0x%0x\n", + cfg->array_type); + } + } + epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length); + } + + return dmic_geo; +} +EXPORT_SYMBOL_GPL(intel_nhlt_get_dmic_geo); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("Intel NHLT driver");
The NHLT spec defines a VENDOR_DEFINED geometry, which requires reading additional information to figure out the number of microphones.
Signed-off-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com --- include/sound/intel-nhlt.h | 10 ++++++++-- sound/hda/intel-nhlt.c | 6 +++++- 2 files changed, 13 insertions(+), 3 deletions(-)
diff --git a/include/sound/intel-nhlt.h b/include/sound/intel-nhlt.h index 857922f03931..f657fd8fc0ad 100644 --- a/include/sound/intel-nhlt.h +++ b/include/sound/intel-nhlt.h @@ -96,16 +96,22 @@ struct nhlt_resource_desc { #define MIC_ARRAY_2CH 2 #define MIC_ARRAY_4CH 4
-struct nhlt_tdm_config { +struct nhlt_device_specific_config { u8 virtual_slot; u8 config_type; } __packed;
struct nhlt_dmic_array_config { - struct nhlt_tdm_config tdm_config; + struct nhlt_device_specific_config device_config; u8 array_type; } __packed;
+struct nhlt_vendor_dmic_array_config { + struct nhlt_dmic_array_config dmic_config; + u8 nb_mics; + /* TODO add vendor mic config */ +} __packed; + enum { NHLT_MIC_ARRAY_2CH_SMALL = 0xa, NHLT_MIC_ARRAY_2CH_BIG = 0xb, diff --git a/sound/hda/intel-nhlt.c b/sound/hda/intel-nhlt.c index 7a62e03ba407..daede96f28ee 100644 --- a/sound/hda/intel-nhlt.c +++ b/sound/hda/intel-nhlt.c @@ -63,6 +63,7 @@ int intel_nhlt_get_dmic_geo(struct device *dev, struct nhlt_acpi_table *nhlt) { struct nhlt_endpoint *epnt; struct nhlt_dmic_array_config *cfg; + struct nhlt_vendor_dmic_array_config *cfg_vendor; unsigned int dmic_geo = 0; u8 j;
@@ -86,7 +87,10 @@ int intel_nhlt_get_dmic_geo(struct device *dev, struct nhlt_acpi_table *nhlt) case NHLT_MIC_ARRAY_4CH_2ND_GEOM: dmic_geo = MIC_ARRAY_4CH; break; - + case NHLT_MIC_ARRAY_VENDOR_DEFINED: + cfg_vendor = (struct nhlt_vendor_dmic_array_config *)cfg; + dmic_geo = cfg_vendor->nb_mics; + break; default: dev_warn(dev, "undefined DMIC array_type 0x%0x\n", cfg->array_type);
No functionality change, only use common functions now.
Signed-off-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com --- sound/soc/intel/Kconfig | 1 + sound/soc/intel/skylake/skl-nhlt.c | 90 ------------------------------ sound/soc/intel/skylake/skl.c | 12 ++-- sound/soc/intel/skylake/skl.h | 3 - 4 files changed, 9 insertions(+), 97 deletions(-)
diff --git a/sound/soc/intel/Kconfig b/sound/soc/intel/Kconfig index 96a00a9d4cf8..a3ec17fd63cd 100644 --- a/sound/soc/intel/Kconfig +++ b/sound/soc/intel/Kconfig @@ -215,6 +215,7 @@ config SND_SOC_INTEL_SKYLAKE_COMMON select SND_SOC_INTEL_SST select SND_SOC_HDAC_HDA if SND_SOC_INTEL_SKYLAKE_HDAUDIO_CODEC select SND_SOC_ACPI_INTEL_MATCH + select SND_INTEL_NHLT help If you have a Intel Skylake/Broxton/ApolloLake/KabyLake/ GeminiLake or CannonLake platform with the DSP enabled in the BIOS diff --git a/sound/soc/intel/skylake/skl-nhlt.c b/sound/soc/intel/skylake/skl-nhlt.c index aabc5d71650e..6f57ceb9efb7 100644 --- a/sound/soc/intel/skylake/skl-nhlt.c +++ b/sound/soc/intel/skylake/skl-nhlt.c @@ -13,54 +13,6 @@ #include "skl.h" #include "skl-i2s.h"
-#define NHLT_ACPI_HEADER_SIG "NHLT" - -/* Unique identification for getting NHLT blobs */ -static guid_t osc_guid = - GUID_INIT(0xA69F886E, 0x6CEB, 0x4594, - 0xA4, 0x1F, 0x7B, 0x5D, 0xCE, 0x24, 0xC5, 0x53); - - -struct nhlt_acpi_table *skl_nhlt_init(struct device *dev) -{ - acpi_handle handle; - union acpi_object *obj; - struct nhlt_resource_desc *nhlt_ptr = NULL; - struct nhlt_acpi_table *nhlt_table = NULL; - - handle = ACPI_HANDLE(dev); - if (!handle) { - dev_err(dev, "Didn't find ACPI_HANDLE\n"); - return NULL; - } - - obj = acpi_evaluate_dsm(handle, &osc_guid, 1, 1, NULL); - if (obj && obj->type == ACPI_TYPE_BUFFER) { - nhlt_ptr = (struct nhlt_resource_desc *)obj->buffer.pointer; - if (nhlt_ptr->length) - nhlt_table = (struct nhlt_acpi_table *) - memremap(nhlt_ptr->min_addr, nhlt_ptr->length, - MEMREMAP_WB); - ACPI_FREE(obj); - if (nhlt_table && (strncmp(nhlt_table->header.signature, - NHLT_ACPI_HEADER_SIG, - strlen(NHLT_ACPI_HEADER_SIG)) != 0)) { - memunmap(nhlt_table); - dev_err(dev, "NHLT ACPI header signature incorrect\n"); - return NULL; - } - return nhlt_table; - } - - dev_err(dev, "device specific method to extract NHLT blob failed\n"); - return NULL; -} - -void skl_nhlt_free(struct nhlt_acpi_table *nhlt) -{ - memunmap((void *) nhlt); -} - static struct nhlt_specific_cfg *skl_get_specific_cfg( struct device *dev, struct nhlt_fmt *fmt, u8 no_ch, u32 rate, u16 bps, u8 linktype) @@ -163,48 +115,6 @@ struct nhlt_specific_cfg return NULL; }
-int skl_get_dmic_geo(struct skl *skl) -{ - struct nhlt_acpi_table *nhlt = (struct nhlt_acpi_table *)skl->nhlt; - struct nhlt_endpoint *epnt; - struct nhlt_dmic_array_config *cfg; - struct device *dev = &skl->pci->dev; - unsigned int dmic_geo = 0; - u8 j; - - if (!nhlt) - return 0; - - epnt = (struct nhlt_endpoint *)nhlt->desc; - - for (j = 0; j < nhlt->endpoint_count; j++) { - if (epnt->linktype == NHLT_LINK_DMIC) { - cfg = (struct nhlt_dmic_array_config *) - (epnt->config.caps); - switch (cfg->array_type) { - case NHLT_MIC_ARRAY_2CH_SMALL: - case NHLT_MIC_ARRAY_2CH_BIG: - dmic_geo |= MIC_ARRAY_2CH; - break; - - case NHLT_MIC_ARRAY_4CH_1ST_GEOM: - case NHLT_MIC_ARRAY_4CH_L_SHAPED: - case NHLT_MIC_ARRAY_4CH_2ND_GEOM: - dmic_geo |= MIC_ARRAY_4CH; - break; - - default: - dev_warn(dev, "undefined DMIC array_type 0x%0x\n", - cfg->array_type); - - } - } - epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length); - } - - return dmic_geo; -} - static void skl_nhlt_trim_space(char *trim) { char *s = trim; diff --git a/sound/soc/intel/skylake/skl.c b/sound/soc/intel/skylake/skl.c index 3362e71b4563..2b5159890a57 100644 --- a/sound/soc/intel/skylake/skl.c +++ b/sound/soc/intel/skylake/skl.c @@ -26,9 +26,11 @@ #include <sound/hdaudio.h> #include <sound/hda_i915.h> #include <sound/hda_codec.h> +#include <sound/intel-nhlt.h> #include "skl.h" #include "skl-sst-dsp.h" #include "skl-sst-ipc.h" + #if IS_ENABLED(CONFIG_SND_SOC_INTEL_SKYLAKE_HDAUDIO_CODEC) #include "../../../soc/codecs/hdac_hda.h" #endif @@ -516,7 +518,9 @@ static int skl_find_machine(struct skl *skl, void *driver_data)
if (pdata) { skl->use_tplg_pcm = pdata->use_tplg_pcm; - mach->mach_params.dmic_num = skl_get_dmic_geo(skl); + mach->mach_params.dmic_num = + intel_nhlt_get_dmic_geo(&skl->pci->dev, + skl->nhlt); }
return 0; @@ -1029,7 +1033,7 @@ static int skl_probe(struct pci_dev *pci,
device_disable_async_suspend(bus->dev);
- skl->nhlt = skl_nhlt_init(bus->dev); + skl->nhlt = intel_nhlt_init(bus->dev);
if (skl->nhlt == NULL) { #if !IS_ENABLED(CONFIG_SND_SOC_INTEL_SKYLAKE_HDAUDIO_CODEC) @@ -1095,7 +1099,7 @@ static int skl_probe(struct pci_dev *pci, out_clk_free: skl_clock_device_unregister(skl); out_nhlt_free: - skl_nhlt_free(skl->nhlt); + intel_nhlt_free(skl->nhlt); out_free: skl_free(bus);
@@ -1144,7 +1148,7 @@ static void skl_remove(struct pci_dev *pci) skl_dmic_device_unregister(skl); skl_clock_device_unregister(skl); skl_nhlt_remove_sysfs(skl); - skl_nhlt_free(skl->nhlt); + intel_nhlt_free(skl->nhlt); skl_free(bus); dev_set_drvdata(&pci->dev, NULL); } diff --git a/sound/soc/intel/skylake/skl.h b/sound/soc/intel/skylake/skl.h index 928e8115a1a7..f4dd6c767993 100644 --- a/sound/soc/intel/skylake/skl.h +++ b/sound/soc/intel/skylake/skl.h @@ -128,13 +128,10 @@ struct skl_dsp_ops { int skl_platform_unregister(struct device *dev); int skl_platform_register(struct device *dev);
-struct nhlt_acpi_table *skl_nhlt_init(struct device *dev); -void skl_nhlt_free(struct nhlt_acpi_table *addr); struct nhlt_specific_cfg *skl_get_ep_blob(struct skl *skl, u32 instance, u8 link_type, u8 s_fmt, u8 no_ch, u32 s_rate, u8 dirn, u8 dev_type);
-int skl_get_dmic_geo(struct skl *skl); int skl_nhlt_update_topology_bin(struct skl *skl); int skl_init_dsp(struct skl *skl); int skl_free_dsp(struct skl *skl);
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 --- sound/pci/hda/Kconfig | 10 ++++++++++ sound/pci/hda/hda_intel.c | 34 ++++++++++++++++++++++++++++++++++ 2 files changed, 44 insertions(+)
diff --git a/sound/pci/hda/Kconfig b/sound/pci/hda/Kconfig index 35d934309cb2..b5966014b5f7 100644 --- a/sound/pci/hda/Kconfig +++ b/sound/pci/hda/Kconfig @@ -12,6 +12,7 @@ config SND_HDA_INTEL tristate "HD Audio PCI" depends on SND_PCI select SND_HDA + select SND_INTEL_NHLT if ACPI help Say Y here to include support for Intel "High Definition Audio" (Azalia) and its compatible devices. @@ -22,6 +23,15 @@ config SND_HDA_INTEL To compile this driver as a module, choose M here: the module will be called snd-hda-intel.
+config SND_HDA_INTEL_DETECT_DMIC + bool "DMIC detection and probe abort" + depends on SND_HDA_INTEL + help + Say Y to detect digital microphones on SKL+ devices. DMICs + cannot be handled by the HDaudio legacy driver and are + currently only supported by the SOF driver. + If unsure say N. + config SND_HDA_TEGRA tristate "NVIDIA Tegra HD Audio" depends on ARCH_TEGRA diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c index cb8b0945547c..ae9c13248a1d 100644 --- a/sound/pci/hda/hda_intel.c +++ b/sound/pci/hda/hda_intel.c @@ -46,6 +46,7 @@ #include <sound/initval.h> #include <sound/hdaudio.h> #include <sound/hda_i915.h> +#include <sound/intel-nhlt.h> #include <linux/vgaarb.h> #include <linux/vga_switcheroo.h> #include <linux/firmware.h> @@ -124,6 +125,7 @@ static char *patch[SNDRV_CARDS]; static bool beep_mode[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = CONFIG_SND_HDA_INPUT_BEEP_MODE}; #endif +static bool dmic_detect = IS_ENABLED(CONFIG_SND_HDA_INTEL_DETECT_DMIC);
module_param_array(index, int, NULL, 0444); MODULE_PARM_DESC(index, "Index value for Intel HD audio interface."); @@ -158,6 +160,8 @@ module_param_array(beep_mode, bool, NULL, 0444); MODULE_PARM_DESC(beep_mode, "Select HDA Beep registration mode " "(0=off, 1=on) (default=1)."); #endif +module_param(dmic_detect, bool, 0444); +MODULE_PARM_DESC(dmic_detect, "DMIC detect on SKL+ platforms");
#ifdef CONFIG_PM static int param_set_xint(const char *val, const struct kernel_param *kp); @@ -2025,6 +2029,25 @@ static const struct hda_controller_ops pci_hda_ops = { .position_check = azx_position_check, };
+static int azx_check_dmic(struct pci_dev *pci, struct azx *chip) +{ + struct nhlt_acpi_table *nhlt; + int ret = 0; + + if (chip->driver_type == AZX_DRIVER_SKL && + pci->class != 0x040300) { + nhlt = intel_nhlt_init(&pci->dev); + if (nhlt) { + if (intel_nhlt_get_dmic_geo(&pci->dev, nhlt)) { + ret = -ENODEV; + dev_info(&pci->dev, "Digital mics found on Skylake+ platform, aborting probe\n"); + } + intel_nhlt_free(nhlt); + } + } + return ret; +} + static int azx_probe(struct pci_dev *pci, const struct pci_device_id *pci_id) { @@ -2055,6 +2078,17 @@ static int azx_probe(struct pci_dev *pci, card->private_data = chip; hda = container_of(chip, struct hda_intel, chip);
+ /* + * stop probe if digital microphones detected on Skylake+ platform + * with the DSP enabled. This is an opt-in behavior defined at build + * time or at run-time with a module parameter + */ + if (dmic_detect) { + err = azx_check_dmic(pci, chip); + if (err < 0) + goto out_free; + } + pci_set_drvdata(pci, card);
err = register_vga_switcheroo(chip);
On Mon, 29 Jul 2019 17:51:46 +0200, Pierre-Louis Bossart wrote:
This is the second take on same problem of detecting when the HDaudio legacy driver can be used and when the SST or SOF drivers are required.
The previous attempt based on a the PCI Class information was a resounding failure and broke audio on Linus' laptop, so we need additional information to avoid enabling a DSP-based driver without a good reason to do so.
This patchset suggests the use of the NHLT information which *in theory* exposes DMIC endpoints. The legacy HDaudio driver cannot handle DMICs and will not provide any capture capabilities. Since it's typically the first one to probe due to the Makefile order, aborting the probe will let the PCI subsystem look for the next driver which hopefully will support this capability.
I tested this patch on 5 devices (SKL, KBL, APL, GLK, WHL), three without DMICs and two with, and the detection seems to work as planned. Additional testing by Canonical and Endless folks did not expose any issues.
Changes since v3 (Feedback from Cezary) Code cleanups (spaces and unnecessary inits) Flipped test statement to return on errors and reduce indentation Removed ACPI leak by adding missing ACPI_FREE()
Changes since v2 (Feedback from Takahi and Cezary) Added comment in Kconfig to alert the user to the dependency on ACPI
Changes since v1 (Feedback from Takashi): Squashed patch3 in patch2 Changed log to dbg_info Fixed module parameter handling
Changes since RFC: Cosmetic code improvements Moved intel-nhlt.h to include/sound Moved intel-nhlt.c to sound/hda Removed SOC prefixes Added full-support for vendor-defined geometries Added Kconfig and kernel module parameter to opt-in
Pierre-Louis Bossart (5): ASoC: Intel: Skylake: move NHLT header to common directory ALSA: hda: move parts of NHLT code to new module ALSA: hda: intel-nhlt: handle NHLT VENDOR_DEFINED DMIC geometry ASoC: Intel: Skylake: use common NHLT module ALSA: hda/intel: stop probe if DMICS are detected on Skylake+ platforms
Applied all five patches now. Thanks.
Mark, the patches are found in topic/hda-dmic branch of sound git tree, which are based on 5.3-rc1. If ASoC tree needs these changes, feel free to pull the branch into yours.
Takashi
On 7/31/19 8:52 AM, Takashi Iwai wrote:
On Mon, 29 Jul 2019 17:51:46 +0200, Pierre-Louis Bossart wrote:
This is the second take on same problem of detecting when the HDaudio legacy driver can be used and when the SST or SOF drivers are required.
The previous attempt based on a the PCI Class information was a resounding failure and broke audio on Linus' laptop, so we need additional information to avoid enabling a DSP-based driver without a good reason to do so.
This patchset suggests the use of the NHLT information which *in theory* exposes DMIC endpoints. The legacy HDaudio driver cannot handle DMICs and will not provide any capture capabilities. Since it's typically the first one to probe due to the Makefile order, aborting the probe will let the PCI subsystem look for the next driver which hopefully will support this capability.
I tested this patch on 5 devices (SKL, KBL, APL, GLK, WHL), three without DMICs and two with, and the detection seems to work as planned. Additional testing by Canonical and Endless folks did not expose any issues.
Changes since v3 (Feedback from Cezary) Code cleanups (spaces and unnecessary inits) Flipped test statement to return on errors and reduce indentation Removed ACPI leak by adding missing ACPI_FREE()
Changes since v2 (Feedback from Takahi and Cezary) Added comment in Kconfig to alert the user to the dependency on ACPI
Changes since v1 (Feedback from Takashi): Squashed patch3 in patch2 Changed log to dbg_info Fixed module parameter handling
Changes since RFC: Cosmetic code improvements Moved intel-nhlt.h to include/sound Moved intel-nhlt.c to sound/hda Removed SOC prefixes Added full-support for vendor-defined geometries Added Kconfig and kernel module parameter to opt-in
Pierre-Louis Bossart (5): ASoC: Intel: Skylake: move NHLT header to common directory ALSA: hda: move parts of NHLT code to new module ALSA: hda: intel-nhlt: handle NHLT VENDOR_DEFINED DMIC geometry ASoC: Intel: Skylake: use common NHLT module ALSA: hda/intel: stop probe if DMICS are detected on Skylake+ platforms
Applied all five patches now. Thanks.
Mark, the patches are found in topic/hda-dmic branch of sound git tree, which are based on 5.3-rc1. If ASoC tree needs these changes, feel free to pull the branch into yours.
Thank you Takashi.
I will need to use these patches for SOF to dynamically change the topology file name depending on how many DMICs are detected for HDaudio platforms, if at all. The current solution requires the user to rename files and it's just not scalable.
participants (2)
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Pierre-Louis Bossart -
Takashi Iwai