On 2022-03-08 8:25 PM, Pierre-Louis Bossart wrote:
We currently extract the DMIC number only for HDaudio or SoundWire
platforms. For I2S/TDM platforms, this wasn't necessary until now, but
with devices with ES8336 we need to find a solution to detect dmics
more reliably than with a DMI quirk.
...
@@ -644,24 +642,35 @@ static int hda_init(struct snd_sof_dev *sdev)
return ret;
}
-#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA) || IS_ENABLED(CONFIG_SND_SOC_SOF_INTEL_SOUNDWIRE)
-
-static int check_nhlt_dmic(struct snd_sof_dev *sdev)
+static int check_dmic_num(struct snd_sof_dev *sdev)
{
struct nhlt_acpi_table *nhlt;
- int dmic_num;
+ int dmic_num = 0;
s/int/u32? (paired with question below)
nhlt = intel_nhlt_init(sdev->dev);
if (nhlt) {
dmic_num = intel_nhlt_get_dmic_geo(sdev->dev, nhlt);
intel_nhlt_free(nhlt);
- if (dmic_num >= 1 && dmic_num <= 4)
- return dmic_num;
}
- return 0;
+ /* allow for module parameter override */
+ if (dmic_num_override != -1) {
+ dev_dbg(sdev->dev,
+ "overriding DMICs detected in NHLT tables %d by kernel param %d\n",
+ dmic_num, dmic_num_override);
+ dmic_num = dmic_num_override;
+ }
+
+ if (dmic_num < 0 || dmic_num > 4) {
How come dmic_num be negative?
+ dev_dbg(sdev->dev, "invalid dmic_number %d\n", dmic_num);
+ dmic_num = 0;
+ }
+
+ return dmic_num;
}