iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ASoC: rt5670: Remove 'OUT Channel Switch' control

Browse Source 
The "OUT Channel Switch" control is a left over from code copied from
thr rt5640 codec driver.

With the rt5640 codec driver the output volume controls have 2 pairs of
mute bits:
bit 7, 15: Mute Control for Spk/Headphone/Line Output Port
bit 6, 14: Mute Control for Spk/Headphone/Line Volume Channel

Bits 7 and 15 are normal mute bits on the rt5670/5672 which are
controlled by 2 dapm widgets:
	SND_SOC_DAPM_SWITCH("LOUT L Playback", SND_SOC_NOPM, 0, 0,
			    &lout_l_enable_control),
	SND_SOC_DAPM_SWITCH("LOUT R Playback", SND_SOC_NOPM, 0, 0,
			    &lout_r_enable_control),

But on the 5670/5672 bit 6 is always reserved, where as bit 14 is
"LOUT Differential Mode" on the 5670 and also reserved on the 5672.

So the "OUT Channel Switch" control which is controlling bits 6+14
of the "LINE Output Control" register is bogus -> remove it.

This should not cause any issues for userspace. AFAICT the rt567x codecs
are only used on x86/ACPI devices and the UCM profiles used there do not
use the "OUT Channel Switch" control.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20210215142118.308516-2-hdegoede@redhat.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Hans de Goede 2021-02-15 15:21:15 +01:00 committed by Mark Brown
parent 8726396851
commit d917b5dde6
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
2 changed files with 0 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
sound/soc/codecs/rt5670.c
View File

@ -637,8 +637,6 @@ static const struct snd_kcontrol_new rt5670_snd_controls[] = {
RT5670_L_VOL_SFT, RT5670_R_VOL_SFT,
39, 1, out_vol_tlv),
/* OUTPUT Control */
SOC_DOUBLE("OUT Channel Switch", RT5670_LOUT1,
RT5670_VOL_L_SFT, RT5670_VOL_R_SFT, 1, 1),
SOC_DOUBLE_TLV("OUT Playback Volume", RT5670_LOUT1,
RT5670_L_VOL_SFT, RT5670_R_VOL_SFT, 39, 1, out_vol_tlv),
/* DAC Digital Volume */

4
sound/soc/codecs/rt5670.h
View File

@ -212,12 +212,8 @@
/* global definition */
#define RT5670_L_MUTE (0x1 << 15)
#define RT5670_L_MUTE_SFT 15
#define RT5670_VOL_L_MUTE (0x1 << 14)
#define RT5670_VOL_L_SFT 14
#define RT5670_R_MUTE (0x1 << 7)
#define RT5670_R_MUTE_SFT 7
#define RT5670_VOL_R_MUTE (0x1 << 6)
#define RT5670_VOL_R_SFT 6
#define RT5670_L_VOL_MASK (0x3f << 8)
#define RT5670_L_VOL_SFT 8
#define RT5670_R_VOL_MASK (0x3f)