[PATCH 1/8] ALSA: hda/realtek: 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 Realek 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_realtek.model=foobar
or
  snd_hda_codec_realtek.model=103c:89c6
for applying a quirk.

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_realtek.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 3dc19174670e..351eb582ad8c 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -16,6 +16,7 @@
 #include <linux/pci.h>
 #include <linux/dmi.h>
 #include <linux/module.h>
+#include <linux/moduleparam.h>
 #include <linux/input.h>
 #include <linux/leds.h>
 #include <sound/core.h>
@@ -27,6 +28,11 @@
 #include "hda_generic.h"
 #include "hda_component.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.");
+
 /* keep halting ALC5505 DSP, for power saving */
 #define HALT_REALTEK_ALC5505
 
@@ -1207,6 +1213,11 @@ static int alc_alloc_spec(struct hda_codec *codec, hda_nid_t mixer_nid)
 		kfree(spec);
 		return err;
 	}
+
+	/* assign optional modelname; freed at snd_hda_codec_dev_release() */
+	if (!codec->modelname && codec_model)
+		codec->modelname = kstrdup(codec_model, GFP_KERNEL);
+
 	return 0;
 }
 
-- 
2.35.3