openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

ALSA: ice1724 - aureon - modify WM8770 Master & DAC volume 

The volume levels in original implementation are incorrect and does
not match the dB scale. The real range is linear (in the sense of
the dB scale) from 0dB to -100dB. Remove logaritmic table and make
all volumes from range 0dB..100dB.

The tests are in RedHat's bugzilla #540817.

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Jaroslav Kysela 2009-12-09 12:43:44 +01:00 committed by Takashi Iwai
parent dd7cdb883b
commit 482e46d4b7
1 changed files with 7 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
sound/pci/ice1712/aureon.c
View File

@ -689,32 +689,14 @@ static int aureon_ac97_mmute_put(struct snd_kcontrol *kcontrol, struct snd_ctl_e
return change;
}
static const DECLARE_TLV_DB_SCALE(db_scale_wm_dac, -12700, 100, 1);
static const DECLARE_TLV_DB_SCALE(db_scale_wm_dac, -10000, 100, 1);
static const DECLARE_TLV_DB_SCALE(db_scale_wm_pcm, -6400, 50, 1);
static const DECLARE_TLV_DB_SCALE(db_scale_wm_adc, -1200, 100, 0);
static const DECLARE_TLV_DB_SCALE(db_scale_ac97_master, -4650, 150, 0);
static const DECLARE_TLV_DB_SCALE(db_scale_ac97_gain, -3450, 150, 0);
/*
* Logarithmic volume values for WM8770
* Computed as 20 * Log10(255 / x)
*/
static const unsigned char wm_vol[256] = {
127, 48, 42, 39, 36, 34, 33, 31, 30, 29, 28, 27, 27, 26, 25, 25, 24, 24, 23,
23, 22, 22, 21, 21, 21, 20, 20, 20, 19, 19, 19, 18, 18, 18, 18, 17, 17, 17,
17, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 13, 13, 13,
13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11,
11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6,
6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0
};
#define WM_VOL_MAX (sizeof(wm_vol) - 1)
#define WM_VOL_MAX 100
#define WM_VOL_CNT 101 /* 0dB .. -100dB */
#define WM_VOL_MUTE 0x8000
static void wm_set_vol(struct snd_ice1712 *ice, unsigned int index, unsigned short vol, unsigned short master)
@ -724,7 +706,8 @@ static void wm_set_vol(struct snd_ice1712 *ice, unsigned int index, unsigned sho
if ((master & WM_VOL_MUTE) || (vol & WM_VOL_MUTE))
nvol = 0;
else
nvol = 127 - wm_vol[(((vol & ~WM_VOL_MUTE) * (master & ~WM_VOL_MUTE)) / 127) & WM_VOL_MAX];
nvol = ((vol % WM_VOL_CNT) * (master % WM_VOL_CNT)) /
WM_VOL_MAX;
wm_put(ice, index, nvol);
wm_put_nocache(ice, index, 0x180 | nvol);
@ -820,7 +803,7 @@ static int wm_vol_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = voices;
uinfo->value.integer.min = 0; /* mute (-101dB) */
uinfo->value.integer.max = 0x7F; /* 0dB */
uinfo->value.integer.max = WM_VOL_MAX; /* 0dB */
return 0;
}
@ -850,7 +833,7 @@ static int wm_vol_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *
snd_ice1712_save_gpio_status(ice);
for (i = 0; i < voices; i++) {
unsigned int vol = ucontrol->value.integer.value[i];
if (vol > 0x7f)
if (vol > WM_VOL_MAX)
continue;
vol |= spec->vol[ofs+i];
if (vol != spec->vol[ofs+i]) {