From 02545bc57512b7660625e454e60e3fb0d07f660d Mon Sep 17 00:00:00 2001 From: Brent Lu Date: Mon, 27 Nov 2023 14:06:56 +0200 Subject: ALSA: hda: intel-nhlt: add intel_nhlt_ssp_device_type() function Add a helper function intel_nhlt_ssp_device_type() to detect the type of specific SSP port. The result is nhlt_device_type enum type which could be NHLT_DEVICE_BT or NHLT_DEVICE_I2S. Signed-off-by: Brent Lu Reviewed-by: Péter Ujfalusi Reviewed-by: Pierre-Louis Bossart Reviewed-by: Bard Liao Signed-off-by: Peter Ujfalusi Signed-off-by: Takashi Iwai Message-ID: <20231127120657.19764-2-peter.ujfalusi@linux.intel.com> --- sound/hda/intel-nhlt.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) (limited to 'sound') diff --git a/sound/hda/intel-nhlt.c b/sound/hda/intel-nhlt.c index 696a958d93e9..088cff799e0b 100644 --- a/sound/hda/intel-nhlt.c +++ b/sound/hda/intel-nhlt.c @@ -343,3 +343,29 @@ intel_nhlt_get_endpoint_blob(struct device *dev, struct nhlt_acpi_table *nhlt, return NULL; } EXPORT_SYMBOL(intel_nhlt_get_endpoint_blob); + +int intel_nhlt_ssp_device_type(struct device *dev, struct nhlt_acpi_table *nhlt, + u8 virtual_bus_id) +{ + struct nhlt_endpoint *epnt; + int i; + + if (!nhlt) + return -EINVAL; + + epnt = (struct nhlt_endpoint *)nhlt->desc; + for (i = 0; i < nhlt->endpoint_count; i++) { + /* for SSP link the virtual bus id is the SSP port number */ + if (epnt->linktype == NHLT_LINK_SSP && + epnt->virtual_bus_id == virtual_bus_id) { + dev_dbg(dev, "SSP%d: dev_type=%d\n", virtual_bus_id, + epnt->device_type); + return epnt->device_type; + } + + epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length); + } + + return -EINVAL; +} +EXPORT_SYMBOL(intel_nhlt_ssp_device_type); -- cgit v1.2.3