Skip to content

Commit

Permalink
ALSA: ice1724 - aureon - modify WM8770 Master & DAC volume
Browse files Browse the repository at this point in the history 
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>
  • Loading branch information
Jaroslav Kysela authored and Takashi Iwai committed Dec 9, 2009
1 parent dd7cdb8 commit 482e46d
Showing 1 changed file with 7 additions and 24 deletions.
31 changes: 7 additions & 24 deletions sound/pci/ice1712/aureon.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -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)
Expand All @@ -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);
Expand Down Expand Up @@ -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;
}

Expand Down Expand Up @@ -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]) {
Expand Down

0 comments on commit 482e46d

Please sign in to comment.