[PATCH AUTOSEL 5.19 24/36] ASoC: SOF: add quirk to override topology mclk_id

Sasha Levin
2022-10-10T00:19:45Z

From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>

[ Upstream commit d136949dd8e2e309dc2f186507486b71cbe9acdb ]

Some Intel-based platforms rely on a topology file that hard-codes the
use of MCLK0. This is incorrect in 10% of the cases. Rather than
generating yet another set of topology files, this patch adds a kernel
module parameter to override the topology value.

In hindsight, we should never have allowed mclks to be specified in
topology, this is a hardware-level information that should not have
been visible in the topology.

Future patches will try to set this value automagically, e.g. by
parsing the NHLT content.

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>
Link: https://lore.kernel.org/r/20220919115350.43104-3-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
sound/soc/sof/intel/hda.c | 11 +++++++++++
sound/soc/sof/ipc3-topology.c | 7 +++++++
sound/soc/sof/sof-priv.h | 4 ++++
3 files changed, 22 insertions(+)

diff --git a/sound/soc/sof/intel/hda.c b/sound/soc/sof/intel/hda.c
index 17f2f3a982c3..7d9e62ab9d0e 100644
--- a/sound/soc/sof/intel/hda.c
+++ b/sound/soc/sof/intel/hda.c
@@ -376,6 +376,10 @@ static int dmic_num_override = -1;
module_param_named(dmic_num, dmic_num_override, int, 0444);
MODULE_PARM_DESC(dmic_num, "SOF HDA DMIC number");

+static int mclk_id_override = -1;
+module_param_named(mclk_id, mclk_id_override, int, 0444);
+MODULE_PARM_DESC(mclk_id, "SOF SSP mclk_id");
+
#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA)
static bool hda_codec_use_common_hdmi = IS_ENABLED(CONFIG_SND_HDA_CODEC_HDMI);
module_param_named(use_common_hdmi, hda_codec_use_common_hdmi, bool, 0444);
@@ -1433,6 +1437,13 @@ struct snd_soc_acpi_mach *hda_machine_select(struct snd_sof_dev *sdev)

sof_pdata->tplg_filename = tplg_filename;
}
+
+ /* check if mclk_id should be modified from topology defaults */
+ if (mclk_id_override >= 0) {
+ dev_info(sdev->dev, "Overriding topology with MCLK %d from kernel_parameter\n", mclk_id_override);
+ sdev->mclk_id_override = true;
+ sdev->mclk_id_quirk = mclk_id_override;
+ }
}

/*
diff --git a/sound/soc/sof/ipc3-topology.c b/sound/soc/sof/ipc3-topology.c
index e97f50d5bcba..b8ec302bc887 100644
--- a/sound/soc/sof/ipc3-topology.c
+++ b/sound/soc/sof/ipc3-topology.c
@@ -1233,6 +1233,7 @@ static int sof_link_afe_load(struct snd_soc_component *scomp, struct snd_sof_dai
static int sof_link_ssp_load(struct snd_soc_component *scomp, struct snd_sof_dai_link *slink,
struct sof_ipc_dai_config *config, struct snd_sof_dai *dai)
{
+ struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(scomp);
struct snd_soc_tplg_hw_config *hw_config = slink->hw_configs;
struct sof_dai_private_data *private = dai->private;
u32 size = sizeof(*config);
@@ -1257,6 +1258,12 @@ static int sof_link_ssp_load(struct snd_soc_component *scomp, struct snd_sof_dai

config[i].hdr.size = size;

+ if (sdev->mclk_id_override) {
+ dev_dbg(scomp->dev, "tplg: overriding topology mclk_id %d by quirk %d\n",
+ config[i].ssp.mclk_id, sdev->mclk_id_quirk);
+ config[i].ssp.mclk_id = sdev->mclk_id_quirk;
+ }
+
/* copy differentiating hw configs to ipc structs */
config[i].ssp.mclk_rate = le32_to_cpu(hw_config[i].mclk_rate);
config[i].ssp.bclk_rate = le32_to_cpu(hw_config[i].bclk_rate);
diff --git a/sound/soc/sof/sof-priv.h b/sound/soc/sof/sof-priv.h
index f11f575fd1da..544e5be9d10e 100644
--- a/sound/soc/sof/sof-priv.h
+++ b/sound/soc/sof/sof-priv.h
@@ -585,6 +585,10 @@ struct snd_sof_dev {
/* to protect the ipc_rx_handler_list and dsp_state_handler_list list */
struct mutex client_event_handler_mutex;

+ /* quirks to override topology values */
+ bool mclk_id_override;
+ u16 mclk_id_quirk; /* same size as in IPC3 definitions */
+
void *private; /* core does not touch this */
};

--
2.35.1