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ALSA: hda: intel-dsp-config: add helper for ACPI DSP driver selection 

Mirror capabilities provided for PCI devices, so that distributions
can select which ACPI driver is loaded at run-time with kernel
parameters and DMI tables instead of forcing a build-time selection.

The "legacy" option supported for HDaudio has no meaning here and will
be ignored.

The 'SST' driver based on closed-source firmware has the priority to
avoid any impact on users, and the choice to use SOF is strictly
opt-in. This may change at some point when the 'SST' driver is
deprecated on Baytrail/Cherrytrail.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Link: https://lore.kernel.org/r/20201112223825.39765-4-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Pierre-Louis Bossart 2020-11-12 16:38:14 -06:00 committed by Mark Brown
parent cf7f4a5320
commit b568230529
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
2 changed files with 84 additions and 0 deletions
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7
include/sound/intel-dsp-config.h
View File

@ -21,6 +21,7 @@ enum {
#if IS_ENABLED(CONFIG_SND_INTEL_DSP_CONFIG)
int snd_intel_dsp_driver_probe(struct pci_dev *pci);
int snd_intel_acpi_dsp_driver_probe(struct device *dev, const u8 acpi_hid[ACPI_ID_LEN]);
#else
@ -29,6 +30,12 @@ static inline int snd_intel_dsp_driver_probe(struct pci_dev *pci)
return SND_INTEL_DSP_DRIVER_ANY;
}
static inline
int snd_intel_acpi_dsp_driver_probe(struct device *dev, const u8 acpi_hid[ACPI_ID_LEN])
{
return SND_INTEL_DSP_DRIVER_ANY;
}
#endif
#endif

77
sound/hda/intel-dsp-config.c
View File

@ -29,6 +29,7 @@ MODULE_PARM_DESC(dsp_driver, "Force the DSP driver for Intel DSP (0=auto, 1=lega
struct config_entry {
u32 flags;
u16 device;
u8 acpi_hid[ACPI_ID_LEN];
const struct dmi_system_id *dmi_table;
};
@ -433,6 +434,82 @@ int snd_intel_dsp_driver_probe(struct pci_dev *pci)
}
EXPORT_SYMBOL_GPL(snd_intel_dsp_driver_probe);
/*
* configuration table
* - the order of similar ACPI ID entries is important!
* - the first successful match will win
*/
static const struct config_entry acpi_config_table[] = {
/* BayTrail */
#if IS_ENABLED(CONFIG_SND_SST_ATOM_HIFI2_PLATFORM_ACPI)
{
.flags = FLAG_SST,
.acpi_hid = "80860F28",
},
#endif
#if IS_ENABLED(CONFIG_SND_SOC_SOF_BAYTRAIL)
{
.flags = FLAG_SOF,
.acpi_hid = "80860F28",
},
#endif
/* CherryTrail */
#if IS_ENABLED(CONFIG_SND_SST_ATOM_HIFI2_PLATFORM_ACPI)
{
.flags = FLAG_SST,
.acpi_hid = "808622A8",
},
#endif
#if IS_ENABLED(CONFIG_SND_SOC_SOF_BAYTRAIL)
{
.flags = FLAG_SOF,
.acpi_hid = "808622A8",
},
#endif
};
static const struct config_entry *snd_intel_acpi_dsp_find_config(const u8 acpi_hid[ACPI_ID_LEN],
const struct config_entry *table,
u32 len)
{
for (; len > 0; len--, table++) {
if (memcmp(table->acpi_hid, acpi_hid, ACPI_ID_LEN))
continue;
if (table->dmi_table && !dmi_check_system(table->dmi_table))
continue;
return table;
}
return NULL;
}
int snd_intel_acpi_dsp_driver_probe(struct device *dev, const u8 acpi_hid[ACPI_ID_LEN])
{
const struct config_entry *cfg;
if (dsp_driver > SND_INTEL_DSP_DRIVER_LEGACY && dsp_driver <= SND_INTEL_DSP_DRIVER_LAST)
return dsp_driver;
if (dsp_driver == SND_INTEL_DSP_DRIVER_LEGACY) {
dev_warn(dev, "dsp_driver parameter %d not supported, using automatic detection\n",
SND_INTEL_DSP_DRIVER_LEGACY);
}
/* find the configuration for the specific device */
cfg = snd_intel_acpi_dsp_find_config(acpi_hid, acpi_config_table,
ARRAY_SIZE(acpi_config_table));
if (!cfg)
return SND_INTEL_DSP_DRIVER_ANY;
if (cfg->flags & FLAG_SST)
return SND_INTEL_DSP_DRIVER_SST;
if (cfg->flags & FLAG_SOF)
return SND_INTEL_DSP_DRIVER_SOF;
return SND_INTEL_DSP_DRIVER_SST;
}
EXPORT_SYMBOL_GPL(snd_intel_acpi_dsp_driver_probe);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("Intel DSP config driver");
MODULE_IMPORT_NS(SOUNDWIRE_INTEL_INIT);