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ALSA: hda - Re-add the lost fake mute support

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Yet another regression by the transition to regmap cache; for better
usability, we had the fake mute control using the zero amp value for
Conexant codecs, and this was forgotten in the new hda core code.

Since the bits 4-7 are unused for the amp registers (as we follow the
syntax of AMP_GET verb), the bit 4 is now used to indicate the fake
mute.  For setting this flag, snd_hda_codec_amp_update() becomes a
function from a simple macro.  The bonus is that it gained a proper
function description.

Signed-off-by: Takashi Iwai <[email protected]>
This commit is contained in:
Takashi Iwai 2015-06-11 10:51:28 +02:00
commit a686ec4c5f
4 changed files with 34 additions and 2 deletions
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2
include/sound/hda_regmap.h
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@ -9,6 +9,8 @@
#include <sound/core.h>
#include <sound/hdaudio.h>
#define AC_AMP_FAKE_MUTE 0x10 /* fake mute bit set to amp verbs */
int snd_hdac_regmap_init(struct hdac_device *codec);
void snd_hdac_regmap_exit(struct hdac_device *codec);
int snd_hdac_regmap_add_vendor_verb(struct hdac_device *codec,