[PATCH 5.18 141/879] ASoC: Intel: sof_ssp_amp: fix no DMIC BE Link on Chromebooks

Greg Kroah-Hartman
2022-06-07T22:13:20Z

From: Brent Lu <brent.lu@intel.com>

[ Upstream commit d1c808765deb2bcd35d827402ed4d75d068aae18 ]

The SOF topology supports 2 BE Links(dmic01 and dmic16k) and each
link supports up to four DMICs. However, Chromebook does not implement
ACPI NHLT table so the mach->mach_params.dmic_num is always zero. We
add a quirk so machine driver knows it's running on a Chromebook and
need to create BE Links for DMIC.

Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Brent Lu <brent.lu@intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20220509170922.54868-3-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
sound/soc/intel/boards/sof_ssp_amp.c | 16 ++++++++++++++--
1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/sound/soc/intel/boards/sof_ssp_amp.c b/sound/soc/intel/boards/sof_ssp_amp.c
index 88530e9de543..ef70c6f27fe1 100644
--- a/sound/soc/intel/boards/sof_ssp_amp.c
+++ b/sound/soc/intel/boards/sof_ssp_amp.c
@@ -9,6 +9,7 @@

#include <linux/acpi.h>
#include <linux/delay.h>
+#include <linux/dmi.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <sound/core.h>
@@ -78,6 +79,16 @@ struct sof_card_private {
bool idisp_codec;
};

+static const struct dmi_system_id chromebook_platforms[] = {
+ {
+ .ident = "Google Chromebooks",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Google"),
+ }
+ },
+ {},
+};
+
static const struct snd_soc_dapm_widget sof_ssp_amp_dapm_widgets[] = {
SND_SOC_DAPM_MIC("SoC DMIC", NULL),
};
@@ -371,7 +382,7 @@ static int sof_ssp_amp_probe(struct platform_device *pdev)
struct snd_soc_dai_link *dai_links;
struct snd_soc_acpi_mach *mach;
struct sof_card_private *ctx;
- int dmic_be_num, hdmi_num = 0;
+ int dmic_be_num = 0, hdmi_num = 0;
int ret, ssp_codec;

ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
@@ -383,7 +394,8 @@ static int sof_ssp_amp_probe(struct platform_device *pdev)

mach = pdev->dev.platform_data;

- dmic_be_num = mach->mach_params.dmic_num;
+ if (dmi_check_system(chromebook_platforms) || mach->mach_params.dmic_num > 0)
+ dmic_be_num = 2;

ssp_codec = sof_ssp_amp_quirk & SOF_AMPLIFIER_SSP_MASK;

--
2.35.1