Hi Perry, On 4/12/21 11:19 AM, Perry Yuan wrote: > From: Perry Yuan <perry_yuan@xxxxxxxx> > > Some new Dell system is going to support audio internal micphone > privacy setting from hardware level with micmute led state changing > When micmute hotkey pressed by user, soft mute will need to be enabled > firstly in case of pop noise, and codec driver need to react to mic > mute event to EC(embedded controller) notifying that SW mute is completed > Then EC will do the hardware mute physically within the timeout reached > > This patch allow codec rt715 and rt715 sdca driver to change the local micmute > led state. Dell privacy led trigger driver will ack EC when micmute key pressed > through this micphone led control interface like hda_generic provided > ACPI method defined in dell-privacy micmute led trigger will be called > for notifying the EC that software mute has been completed, then hardware > audio circuit solution controlled by EC will switch the audio input source off/on > > Signed-off-by: Perry Yuan <perry_yuan@xxxxxxxx> The ALSA kernel-patch-set which I mentioned in previous discussions, which allows controlling this through sysfs has been merged upstream and is currently in for-nex.t. So IMHO you should use the new sysfs mechanism for this rather then adding quirks to individual codec drivers. Regards, Hans > > -------- > v5 -> v6: > * addresed review comments from Jaroslav > * add quirks for micmute led control as short term solution to control > micmute led state change > * add comments for the invert checking > v4 -> v5: > * rebase to latest 5.12 rc4 upstream kernel > v3 -> v4: > * remove unused debug log > * remove compile flag of DELL privacy > * move the micmute_led to local from rt715_priv > * when Jaroslav upstream his gerneric LED trigger driver,I will rebase > this patch,please consider merge this at first > https://lore.kernel.org/alsa-devel/20210211111400.1131020-1-perex@xxxxxxxx/ > v2 -> v3: > * simplify the patch to reuse some val value > * add more detail to the commit info > v1 -> v2: > * fix some format issue > -------- > --- > sound/soc/codecs/rt715-sdca.c | 42 ++++++++++++++++++++++++++++++++++ > sound/soc/codecs/rt715.c | 43 +++++++++++++++++++++++++++++++++++ > 2 files changed, 85 insertions(+) > > diff --git a/sound/soc/codecs/rt715-sdca.c b/sound/soc/codecs/rt715-sdca.c > index 20528afbdc57..47dc31f7f3e3 100644 > --- a/sound/soc/codecs/rt715-sdca.c > +++ b/sound/soc/codecs/rt715-sdca.c > @@ -11,12 +11,14 @@ > #include <linux/moduleparam.h> > #include <linux/kernel.h> > #include <linux/init.h> > +#include <linux/leds.h> > #include <linux/pm_runtime.h> > #include <linux/pm.h> > #include <linux/soundwire/sdw.h> > #include <linux/regmap.h> > #include <linux/slab.h> > #include <linux/platform_device.h> > +#include <linux/dmi.h> > #include <sound/core.h> > #include <sound/pcm.h> > #include <sound/pcm_params.h> > @@ -344,6 +346,32 @@ static int rt715_sdca_get_volsw(struct snd_kcontrol *kcontrol, > return 0; > } > > +static bool micmute_led_set; > +static int dmi_matched(const struct dmi_system_id *dmi) > +{ > + micmute_led_set = 1; > + return 1; > +} > + > +/* Some systems will need to use this to trigger mic mute LED state changed */ > +static const struct dmi_system_id micmute_led_dmi_table[] = { > + { > + .callback = dmi_matched, > + .matches = { > + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), > + DMI_MATCH(DMI_PRODUCT_SKU, "0A32"), > + }, > + }, > + { > + .callback = dmi_matched, > + .matches = { > + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), > + DMI_MATCH(DMI_PRODUCT_SKU, "0A3E"), > + }, > + }, > + {}, > +}; > + > static int rt715_sdca_put_volsw(struct snd_kcontrol *kcontrol, > struct snd_ctl_elem_value *ucontrol) > { > @@ -358,6 +386,7 @@ static int rt715_sdca_put_volsw(struct snd_kcontrol *kcontrol, > unsigned int mask = (1 << fls(max)) - 1; > unsigned int invert = p->invert; > int err; > + bool micmute_led; > > for (i = 0; i < 4; i++) { > if (ucontrol->value.integer.value[i] != rt715->kctl_switch_orig[i]) { > @@ -394,6 +423,18 @@ static int rt715_sdca_put_volsw(struct snd_kcontrol *kcontrol, > return err; > } > > + /* Micmute LED state changed by muted/unmute switch > + * to keep syncing with actual hardware mic mute led state > + * invert will be checked to change the state switch > + */ > + if (invert && micmute_led_set) { > + if (ucontrol->value.integer.value[0] || ucontrol->value.integer.value[1]) > + micmute_led = LED_OFF; > + else > + micmute_led = LED_ON; > + ledtrig_audio_set(LED_AUDIO_MICMUTE, micmute_led); > + } > + > return k_changed; > } > > @@ -1066,6 +1107,7 @@ int rt715_sdca_io_init(struct device *dev, struct sdw_slave *slave) > > pm_runtime_mark_last_busy(&slave->dev); > pm_runtime_put_autosuspend(&slave->dev); > + dmi_check_system(micmute_led_dmi_table); > > return 0; > } > diff --git a/sound/soc/codecs/rt715.c b/sound/soc/codecs/rt715.c > index 34c3357e943b..59d05b28f52e 100644 > --- a/sound/soc/codecs/rt715.c > +++ b/sound/soc/codecs/rt715.c > @@ -13,6 +13,7 @@ > #include <linux/init.h> > #include <linux/delay.h> > #include <linux/i2c.h> > +#include <linux/leds.h> > #include <linux/pm_runtime.h> > #include <linux/pm.h> > #include <linux/soundwire/sdw.h> > @@ -25,6 +26,7 @@ > #include <linux/of.h> > #include <linux/of_gpio.h> > #include <linux/of_device.h> > +#include <linux/dmi.h> > #include <sound/core.h> > #include <sound/pcm.h> > #include <sound/pcm_params.h> > @@ -70,6 +72,32 @@ static void rt715_get_gain(struct rt715_priv *rt715, unsigned int addr_h, > pr_err("Failed to get L channel gain.\n"); > } > > +static bool micmute_led_set; > +static int dmi_matched(const struct dmi_system_id *dmi) > +{ > + micmute_led_set = 1; > + return 1; > +} > + > +/* Some systems will need to use this to trigger mic mute LED state changed */ > +static const struct dmi_system_id micmute_led_dmi_table[] = { > + { > + .callback = dmi_matched, > + .matches = { > + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), > + DMI_MATCH(DMI_PRODUCT_SKU, "0A32"), > + }, > + }, > + { > + .callback = dmi_matched, > + .matches = { > + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), > + DMI_MATCH(DMI_PRODUCT_SKU, "0A3E"), > + }, > + }, > + {}, > +}; > + > /* For Verb-Set Amplifier Gain (Verb ID = 3h) */ > static int rt715_set_amp_gain_put(struct snd_kcontrol *kcontrol, > struct snd_ctl_elem_value *ucontrol) > @@ -88,6 +116,7 @@ static int rt715_set_amp_gain_put(struct snd_kcontrol *kcontrol, > RT715_SET_GAIN_MIX_ADC2_L}; > unsigned int addr_h, addr_l, val_h, val_ll, val_lr; > unsigned int read_ll, read_rl, i, j, loop_cnt; > + bool micmute_led; > > if (strstr(ucontrol->id.name, "Main Capture Switch") || > strstr(ucontrol->id.name, "Main Capture Volume")) > @@ -185,6 +214,19 @@ static int rt715_set_amp_gain_put(struct snd_kcontrol *kcontrol, > if (dapm->bias_level <= SND_SOC_BIAS_STANDBY) > regmap_write(rt715->regmap, > RT715_SET_AUDIO_POWER_STATE, AC_PWRST_D3); > + > + /* Micmute LED state changed by muted/unmute switch > + * to keep syncing with actual hardware mic mute led state > + * invert will be checked to change the state switch > + */ > + if (mc->invert && micmute_led_set) { > + if (ucontrol->value.integer.value[0] || ucontrol->value.integer.value[1]) > + micmute_led = LED_OFF; > + else > + micmute_led = LED_ON; > + ledtrig_audio_set(LED_AUDIO_MICMUTE, micmute_led); > + } > + > return 0; > } > > @@ -901,6 +943,7 @@ int rt715_io_init(struct device *dev, struct sdw_slave *slave) > > pm_runtime_mark_last_busy(&slave->dev); > pm_runtime_put_autosuspend(&slave->dev); > + dmi_check_system(micmute_led_dmi_table); > > return 0; > } >
