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ASoC: rt711-sdca: use generic SDCA interrupt handler
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Rather than open-code, use the generic SDCA interrupt handler after
registering the interrupt sources and callbacks.

FIXME: Need to figure out what actions need to be taken for INT0 and
INT8.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
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@plbossart
plbossart committed Aug 19, 2024
1 parent e72da87 commit 43c3910
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Showing 4 changed files with 117 additions and 139 deletions.
1 change: 1 addition & 0 deletions sound/soc/codecs/Kconfig
View file
Original file line number Diff line number Diff line change
Expand Up @@ -1727,6 +1727,7 @@ config SND_SOC_RT711_SDW
config SND_SOC_RT711_SDCA_SDW
tristate "Realtek RT711 SDCA Codec - SDW"
depends on SOUNDWIRE
select SND_SOC_SDCA_IRQ_HANDLER
select REGMAP_SOUNDWIRE
select REGMAP_SOUNDWIRE_MBQ

Expand Down
152 changes: 30 additions & 122 deletions sound/soc/codecs/rt711-sdca-sdw.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -146,21 +146,6 @@ static int rt711_sdca_update_status(struct sdw_slave *slave,
if (status == SDW_SLAVE_UNATTACHED)
rt711->hw_init = false;

if (status == SDW_SLAVE_ATTACHED) {
if (rt711->hs_jack) {
/*
* Due to the SCP_SDCA_INTMASK will be cleared by any reset, and then
* if the device attached again, we will need to set the setting back.
* It could avoid losing the jack detection interrupt.
* This also could sync with the cache value as the rt711_sdca_jack_init set.
*/
sdw_write_no_pm(rt711->slave, SDW_SCP_SDCA_INTMASK1,
SDW_SCP_SDCA_INTMASK_SDCA_0);
sdw_write_no_pm(rt711->slave, SDW_SCP_SDCA_INTMASK2,
SDW_SCP_SDCA_INTMASK_SDCA_8);
}
}

/*
* Perform initialization only if slave status is present and
* hw_init flag is false
Expand Down Expand Up @@ -238,100 +223,32 @@ static int rt711_sdca_interrupt_callback(struct sdw_slave *slave,
struct sdw_slave_intr_status *status)
{
struct rt711_sdca_priv *rt711 = dev_get_drvdata(&slave->dev);
int ret, stat;
int count = 0, retry = 3;
unsigned int sdca_cascade, scp_sdca_stat1, scp_sdca_stat2 = 0;
int ret;

dev_dbg(&slave->dev,
"%s control_port_stat=%x, sdca_cascade=%x", __func__,
status->control_port, status->sdca_cascade);

if (cancel_delayed_work_sync(&rt711->jack_detect_work)) {
dev_warn(&slave->dev, "%s the pending delayed_work was cancelled", __func__);
/* avoid the HID owner doesn't change to device */
if (rt711->scp_sdca_stat2)
scp_sdca_stat2 = rt711->scp_sdca_stat2;
/*
* Preserve status for HID, to make sure the UMP interrupt is handled
* and the ownership can be changed in the workqueue back to DEVICE
*/
sdca_interrupt_clear_history(slave, BIT(8));
} else {
/* clear all history */
sdca_interrupt_clear_history(slave, 0);
}

/*
* The critical section below intentionally protects a rather large piece of code.
* We don't want to allow the system suspend to disable an interrupt while we are
* processing it, which could be problematic given the quirky SoundWire interrupt
* scheme. We do want however to prevent new workqueues from being scheduled if
* the disable_irq flag was set during system suspend.
*/
mutex_lock(&rt711->disable_irq_lock);

ret = sdw_read_no_pm(rt711->slave, SDW_SCP_SDCA_INT1);
if (ret < 0)
goto io_error;
rt711->scp_sdca_stat1 = ret;
ret = sdw_read_no_pm(rt711->slave, SDW_SCP_SDCA_INT2);
ret = sdca_interrupt_handler(slave);
if (ret < 0)
goto io_error;
rt711->scp_sdca_stat2 = ret;
if (scp_sdca_stat2)
rt711->scp_sdca_stat2 |= scp_sdca_stat2;

do {
/* clear flag */
ret = sdw_read_no_pm(rt711->slave, SDW_SCP_SDCA_INT1);
if (ret < 0)
goto io_error;
if (ret & SDW_SCP_SDCA_INTMASK_SDCA_0) {
ret = sdw_write_no_pm(rt711->slave, SDW_SCP_SDCA_INT1,
SDW_SCP_SDCA_INTMASK_SDCA_0);
if (ret < 0)
goto io_error;
}
ret = sdw_read_no_pm(rt711->slave, SDW_SCP_SDCA_INT2);
if (ret < 0)
goto io_error;
if (ret & SDW_SCP_SDCA_INTMASK_SDCA_8) {
ret = sdw_write_no_pm(rt711->slave, SDW_SCP_SDCA_INT2,
SDW_SCP_SDCA_INTMASK_SDCA_8);
if (ret < 0)
goto io_error;
}

/* check if flag clear or not */
ret = sdw_read_no_pm(rt711->slave, SDW_DP0_INT);
if (ret < 0)
goto io_error;
sdca_cascade = ret & SDW_DP0_SDCA_CASCADE;

ret = sdw_read_no_pm(rt711->slave, SDW_SCP_SDCA_INT1);
if (ret < 0)
goto io_error;
scp_sdca_stat1 = ret & SDW_SCP_SDCA_INTMASK_SDCA_0;

ret = sdw_read_no_pm(rt711->slave, SDW_SCP_SDCA_INT2);
if (ret < 0)
goto io_error;
scp_sdca_stat2 = ret & SDW_SCP_SDCA_INTMASK_SDCA_8;

stat = scp_sdca_stat1 || scp_sdca_stat2 || sdca_cascade;
dev_err(&slave->dev,
"%s: error %d in sdca_interrupt_handler\n",
__func__, ret);

count++;
} while (stat != 0 && count < retry);

if (stat)
dev_warn(&slave->dev,
"%s scp_sdca_stat1=0x%x, scp_sdca_stat2=0x%x\n", __func__,
rt711->scp_sdca_stat1, rt711->scp_sdca_stat2);

if (status->sdca_cascade && !rt711->disable_irq)
mod_delayed_work(system_power_efficient_wq,
&rt711->jack_detect_work, msecs_to_jiffies(30));

mutex_unlock(&rt711->disable_irq_lock);

return 0;

io_error:
mutex_unlock(&rt711->disable_irq_lock);
pr_err_ratelimited("IO error in %s, ret %d\n", __func__, ret);
return ret;

}

static const struct sdw_slave_ops rt711_sdca_slave_ops = {
Expand Down Expand Up @@ -369,7 +286,8 @@ static int rt711_sdca_sdw_remove(struct sdw_slave *slave)
pm_runtime_disable(&slave->dev);

mutex_destroy(&rt711->calibrate_mutex);
mutex_destroy(&rt711->disable_irq_lock);

sdca_interrupt_info_release(slave);

return 0;
}
Expand Down Expand Up @@ -400,28 +318,17 @@ static int __maybe_unused rt711_sdca_dev_system_suspend(struct device *dev)
{
struct rt711_sdca_priv *rt711_sdca = dev_get_drvdata(dev);
struct sdw_slave *slave = dev_to_sdw_dev(dev);
int ret1, ret2;
int ret;

if (!rt711_sdca->hw_init)
return 0;

/*
* prevent new interrupts from being handled after the
* deferred work completes and before the parent disables
* interrupts on the link
*/
mutex_lock(&rt711_sdca->disable_irq_lock);
rt711_sdca->disable_irq = true;
ret1 = sdw_update_no_pm(slave, SDW_SCP_SDCA_INTMASK1,
SDW_SCP_SDCA_INTMASK_SDCA_0, 0);
ret2 = sdw_update_no_pm(slave, SDW_SCP_SDCA_INTMASK2,
SDW_SCP_SDCA_INTMASK_SDCA_8, 0);
mutex_unlock(&rt711_sdca->disable_irq_lock);

if (ret1 < 0 || ret2 < 0) {
ret = sdca_interrupt_enable(rt711_sdca->slave,
BIT(8) | BIT(0),
false);
if (ret < 0)
/* log but don't prevent suspend from happening */
dev_dbg(&slave->dev, "%s: could not disable SDCA interrupts\n:", __func__);
}
dev_dbg(&slave->dev, "could not disable SDCA interrupts\n:");

return rt711_sdca_dev_suspend(dev);
}
Expand All @@ -433,18 +340,18 @@ static int __maybe_unused rt711_sdca_dev_resume(struct device *dev)
struct sdw_slave *slave = dev_to_sdw_dev(dev);
struct rt711_sdca_priv *rt711 = dev_get_drvdata(dev);
unsigned long time;
int ret;

if (!rt711->first_hw_init)
return 0;

if (!slave->unattach_request) {
mutex_lock(&rt711->disable_irq_lock);
if (rt711->disable_irq == true) {
sdw_write_no_pm(slave, SDW_SCP_SDCA_INTMASK1, SDW_SCP_SDCA_INTMASK_SDCA_0);
sdw_write_no_pm(slave, SDW_SCP_SDCA_INTMASK2, SDW_SCP_SDCA_INTMASK_SDCA_8);
rt711->disable_irq = false;
}
mutex_unlock(&rt711->disable_irq_lock);
ret = sdca_interrupt_enable(rt711->slave,
BIT(8) | BIT(0),
true);
if (ret < 0)
/* log but don't prevent resume from happening */
dev_dbg(&slave->dev, "could not enable SDCA interrupts\n:");
goto regmap_sync;
}

Expand Down Expand Up @@ -486,3 +393,4 @@ module_sdw_driver(rt711_sdca_sdw_driver);
MODULE_DESCRIPTION("ASoC RT711 SDCA SDW driver");
MODULE_AUTHOR("Shuming Fan <shumingf@realtek.com>");
MODULE_LICENSE("GPL");
MODULE_IMPORT_NS(SND_SOC_SDCA_IRQ_HANDLER);
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