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| author |   Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> | 2022-09-19 13:53:49 +0200 |
|---|---|---|
| committer |   Mark Brown <broonie@kernel.org> | 2022-09-20 12:25:03 +0100 |
| commit | 72176fccd5de1d9cf61e42771bb00567723f3353 (patch) | |
| tree | ea24a57f2a4a8bdb2a0c05cbb4aeaf901132a1af /include/sound | |
| parent | ASoC: SOF: add quirk to override topology mclk_id (diff) | |
| download | linux-dev-72176fccd5de1d9cf61e42771bb00567723f3353.tar.xz linux-dev-72176fccd5de1d9cf61e42771bb00567723f3353.zip | |
ALSA: hda: intel-nhlt: add intel_nhlt_ssp_mclk_mask()
SOF topologies hard-code the MCLK used for SSP connections. That was a
bad idea in hindsight, this information should really come from BIOS
and/or machine driver.
This patch introduces a helper to scan all SSP endpoints connected to
a codec, and all formats to see what MCLK is used. When BIT(0) of the
mdivc offset if set in the SSP blob, MCLK0 is used, and likewise when
BIT(1) is set MCLK1 is used.
The case where both MCLKs are used is possible but has never been seen
in practice so should be treated as an error by the caller.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20220919115350.43104-4-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'include/sound')
| -rw-r--r-- | include/sound/intel-nhlt.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/sound/intel-nhlt.h b/include/sound/intel-nhlt.h index 3d5cf201cd80..53470d6a28d6 100644 --- a/include/sound/intel-nhlt.h +++ b/include/sound/intel-nhlt.h @@ -136,6 +136,8 @@ bool intel_nhlt_has_endpoint_type(struct nhlt_acpi_table *nhlt, u8 link_type); int intel_nhlt_ssp_endpoint_mask(struct nhlt_acpi_table *nhlt, u8 device_type); +int intel_nhlt_ssp_mclk_mask(struct nhlt_acpi_table *nhlt, int ssp_num); + struct nhlt_specific_cfg * intel_nhlt_get_endpoint_blob(struct device *dev, struct nhlt_acpi_table *nhlt, u32 bus_id, u8 link_type, u8 vbps, u8 bps, @@ -169,6 +171,11 @@ static inline int intel_nhlt_ssp_endpoint_mask(struct nhlt_acpi_table *nhlt, u8 return 0; } +static inline int intel_nhlt_ssp_mclk_mask(struct nhlt_acpi_table *nhlt, int ssp_num) +{ + return 0; +} + static inline struct nhlt_specific_cfg * intel_nhlt_get_endpoint_blob(struct device *dev, struct nhlt_acpi_table *nhlt, u32 bus_id, u8 link_type, u8 vbps, u8 bps, |