diff options
| author | Clemens Ladisch <clemens@ladisch.de> | 2010-05-25 09:04:49 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2010-05-25 20:23:54 +0200 |
| commit | 4daf7a0c0b3dd3c2e2ec829ecee8608d04d67773 (patch) | |
| tree | 1934d7b283f2385afc27aa48fa020f86779b6098 /sound | |
| parent | ALSA: pcm: fix delta calculation at boundary wraparound (diff) | |
| download | linux-4daf7a0c0b3dd3c2e2ec829ecee8608d04d67773.tar.xz linux-4daf7a0c0b3dd3c2e2ec829ecee8608d04d67773.zip | |
ALSA: emu10k1: allow high-resolution mixer controls
Add a module option to allow the GPR mixer controls to have the full
resolution of the hardware, i.e., 0...2^31-1 instead of 0...100.
Because of bugs in userspace tools like alsactl and alsamixer, this is
not yet enabled by default.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/pci/emu10k1/emufx.c | 36 |
1 files changed, 28 insertions, 8 deletions
diff --git a/sound/pci/emu10k1/emufx.c b/sound/pci/emu10k1/emufx.c index 4b302d86f5f2..7a9401462c1c 100644 --- a/sound/pci/emu10k1/emufx.c +++ b/sound/pci/emu10k1/emufx.c @@ -35,6 +35,7 @@ #include <linux/vmalloc.h> #include <linux/init.h> #include <linux/mutex.h> +#include <linux/moduleparam.h> #include <sound/core.h> #include <sound/tlv.h> @@ -50,6 +51,10 @@ #define EMU10K1_CENTER_LFE_FROM_FRONT #endif +static bool high_res_gpr_volume; +module_param(high_res_gpr_volume, bool, 0444); +MODULE_PARM_DESC(high_res_gpr_volume, "GPR mixer controls use 31-bit range."); + /* * Tables */ @@ -296,6 +301,7 @@ static const u32 db_table[101] = { /* EMU10k1/EMU10k2 DSP control db gain */ static const DECLARE_TLV_DB_SCALE(snd_emu10k1_db_scale1, -4000, 40, 1); +static const DECLARE_TLV_DB_LINEAR(snd_emu10k1_db_linear, TLV_DB_GAIN_MUTE, 0); static const u32 onoff_table[2] = { 0x00000000, 0x00000001 @@ -1072,10 +1078,17 @@ snd_emu10k1_init_mono_control(struct snd_emu10k1_fx8010_control_gpr *ctl, strcpy(ctl->id.name, name); ctl->vcount = ctl->count = 1; ctl->gpr[0] = gpr + 0; ctl->value[0] = defval; - ctl->min = 0; - ctl->max = 100; - ctl->tlv = snd_emu10k1_db_scale1; - ctl->translation = EMU10K1_GPR_TRANSLATION_TABLE100; + if (high_res_gpr_volume) { + ctl->min = 0; + ctl->max = 0x7fffffff; + ctl->tlv = snd_emu10k1_db_linear; + ctl->translation = EMU10K1_GPR_TRANSLATION_NONE; + } else { + ctl->min = 0; + ctl->max = 100; + ctl->tlv = snd_emu10k1_db_scale1; + ctl->translation = EMU10K1_GPR_TRANSLATION_TABLE100; + } } static void __devinit @@ -1087,10 +1100,17 @@ snd_emu10k1_init_stereo_control(struct snd_emu10k1_fx8010_control_gpr *ctl, ctl->vcount = ctl->count = 2; ctl->gpr[0] = gpr + 0; ctl->value[0] = defval; ctl->gpr[1] = gpr + 1; ctl->value[1] = defval; - ctl->min = 0; - ctl->max = 100; - ctl->tlv = snd_emu10k1_db_scale1; - ctl->translation = EMU10K1_GPR_TRANSLATION_TABLE100; + if (high_res_gpr_volume) { + ctl->min = 0; + ctl->max = 0x7fffffff; + ctl->tlv = snd_emu10k1_db_linear; + ctl->translation = EMU10K1_GPR_TRANSLATION_NONE; + } else { + ctl->min = 0; + ctl->max = 100; + ctl->tlv = snd_emu10k1_db_scale1; + ctl->translation = EMU10K1_GPR_TRANSLATION_TABLE100; + } } static void __devinit |