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

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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
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31
sound/pci/ice1712/aureon.c
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@ -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]) {