Baytrail-CR devices usually expose information in the DSDT which can be used to auto-detect AIF1/AIF2 connections. The CHAN package contains two integers, the first one describes the AIF number (1: AIF1, 2: AIF2) and the second the MCLK value (ignored in this patch)
For example the following information is found in Lenovo 100s:
Device (RTEK) { [...] Name (CHAN, Package (0x02) { One, 0x017D7840 })
While on Asus T100TAF the package values are:
Name (CHAN, Package (0x02) { 0x02, 0x017D7840 })
This patch relies on the new common routine to extract a package exposed by a device indexed with the HID value. The CHAN package contents are queried from the machine driver and stored in a structure.
If this auto-detection fails (missing or bad package in the BIOS), the routing falls back to SSP0-AIF2.
Note that quirks may still be needed to support mono speakers or microphone, but this should reduce the number of issues with Baytrail significantly.
Signed-off-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com --- sound/soc/intel/boards/bytcr_rt5640.c | 53 +++++++++++++++++++++++++++++++++-- 1 file changed, 51 insertions(+), 2 deletions(-)
diff --git a/sound/soc/intel/boards/bytcr_rt5640.c b/sound/soc/intel/boards/bytcr_rt5640.c index 751e009..63a7993 100644 --- a/sound/soc/intel/boards/bytcr_rt5640.c +++ b/sound/soc/intel/boards/bytcr_rt5640.c @@ -689,6 +689,10 @@ static bool is_valleyview(void) return true; }
+struct acpi_chan_package { /* ACPICA seems to require 64 bit integers */ + u64 aif_value; /* 1: AIF1, 2: AIF2 */ + u64 mclock_value; /* usually 25MHz (0x17d7940), ignored */ +};
static int snd_byt_rt5640_mc_probe(struct platform_device *pdev) { @@ -698,6 +702,7 @@ static int snd_byt_rt5640_mc_probe(struct platform_device *pdev) int i; int dai_index; struct byt_rt5640_private *priv; + bool is_bytcr = false;
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_ATOMIC); if (!priv) @@ -734,8 +739,52 @@ static int snd_byt_rt5640_mc_probe(struct platform_device *pdev) struct sst_platform_info *p_info = mach->pdata; const struct sst_res_info *res_info = p_info->res_info;
- /* TODO: use CHAN package info from BIOS to detect AIF1/AIF2 */ - if (res_info->acpi_ipc_irq_index == 0) { + if (res_info->acpi_ipc_irq_index == 0) + is_bytcr = true; + } + + if (is_bytcr) { + /* + * Baytrail CR platforms may have CHAN package in BIOS, try + * to find relevant routing quirk based as done on Windows + * platforms. We have to read the information directly from the + * BIOS, at this stage the card is not created and the links + * with the codec driver/pdata are non-existent + */ + + struct acpi_chan_package chan_package; + + /* format specified: 2 64-bit integers */ + struct acpi_buffer format = {sizeof("NN"), "NN"}; + struct acpi_buffer state = {0, NULL}; + struct sst_acpi_package_context pkg_ctx; + bool pkg_found = false; + + state.length = sizeof(chan_package); + state.pointer = &chan_package; + + pkg_ctx.name = "CHAN"; + pkg_ctx.length = 2; + pkg_ctx.format = &format; + pkg_ctx.state = &state; + pkg_ctx.data_valid = false; + + pkg_found = sst_acpi_find_package_from_hid(mach->id, &pkg_ctx); + if (pkg_found) { + if (chan_package.aif_value == 1) { + dev_info(&pdev->dev, "BIOS Routing: AIF1 connected\n"); + byt_rt5640_quirk |= BYT_RT5640_SSP0_AIF1; + } else if (chan_package.aif_value == 2) { + dev_info(&pdev->dev, "BIOS Routing: AIF2 connected\n"); + byt_rt5640_quirk |= BYT_RT5640_SSP0_AIF2; + } else { + dev_info(&pdev->dev, "BIOS Routing isn't valid, ignored\n"); + pkg_found = false; + } + } + + if (!pkg_found) { + /* no BIOS indications, assume SSP0-AIF2 connection */ byt_rt5640_quirk |= BYT_RT5640_SSP0_AIF2; } }