[PATCH 4/8] ALSA: hda/cs8409: Add model option to codec driver, too

[Takashi Iwai]

The model option of snd-hda-intel or SOF driver is useful for testing
/ debugging quirks.  Since many devices have multiple codecs and the
quirk is rather codec-specific, it's often difficult to pass the model
to the proper target.

This patch adds the equivalent model option to CS8409 codec driver, so
that user can optionally specify the option for the codec instead of
snd-hda-intel or SOF drivers.

That is, you can pass the boot option like
  snd_hda_codec_cs8409.model=foobar
or
  snd_hda_codec_cs8409.model=1028:0c43
for applying a quirk no matter whether you use snd-hda-intel or SOF.

The model option of snd-hda-intel or SOF is still effective.  When the
option is given for both, the option for the controller driver wins.

Signed-off-by: Takashi Iwai <tiwai at suse.de>
---
 sound/pci/hda/patch_cs8409.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/sound/pci/hda/patch_cs8409.c b/sound/pci/hda/patch_cs8409.c
index 754aa8ddd2e4..13aef05383a4 100644
--- a/sound/pci/hda/patch_cs8409.c
+++ b/sound/pci/hda/patch_cs8409.c
@@ -9,10 +9,16 @@
 #include <linux/init.h>
 #include <linux/slab.h>
 #include <linux/module.h>
+#include <linux/moduleparam.h>
 #include <sound/core.h>
 #include <linux/mutex.h>
 #include <linux/iopoll.h>
 
+/* codec-specific model option -- equivalent with snd-hda-intel.model option */
+static char *codec_model;
+module_param_named(model, codec_model, charp, 0444);
+MODULE_PARM_DESC(model, "Use the given board model.");
+
 #include "patch_cs8409.h"
 
 /******************************************************************************
@@ -66,6 +72,10 @@ static struct cs8409_spec *cs8409_alloc_spec(struct hda_codec *codec)
 	INIT_DELAYED_WORK(&spec->i2c_clk_work, cs8409_disable_i2c_clock_worker);
 	snd_hda_gen_spec_init(&spec->gen);
 
+	/* assign optional modelname; freed at snd_hda_codec_dev_release() */
+	if (!codec->modelname && codec_model)
+		codec->modelname = kstrdup(codec_model, GFP_KERNEL);
+
 	return spec;
 }
 
-- 
2.35.3