[PATCH v1 4/7] input: cyapa: fully support runtime suspend power management

From: Dudley Du
Date: Mon Jun 15 2015 - 05:09:35 EST

Fix the the runtime suspend power management not working issue when system
starts up and before user touches the trackpad device.
TEST=test on Chromebook.

Signed-off-by: Dudley Du <dudl@xxxxxxxxxxx>
---
drivers/input/mouse/cyapa.c | 79 +++++++++++++++++++++++++++-------------
drivers/input/mouse/cyapa.h | 2 +-
drivers/input/mouse/cyapa_gen3.c | 4 +-
drivers/input/mouse/cyapa_gen5.c | 21 +++++++----
drivers/input/mouse/cyapa_gen6.c | 4 +-
5 files changed, 72 insertions(+), 38 deletions(-)

diff --git a/drivers/input/mouse/cyapa.c b/drivers/input/mouse/cyapa.c
index d2a24fc..9288948 100644
--- a/drivers/input/mouse/cyapa.c
+++ b/drivers/input/mouse/cyapa.c
@@ -371,7 +371,7 @@ static int cyapa_detect(struct cyapa *cyapa)
static int cyapa_open(struct input_dev *input)
{
struct cyapa *cyapa = input_get_drvdata(input);
- struct i2c_client *client = cyapa->client;
+ struct device *dev = &cyapa->client->dev;
int error;

error = mutex_lock_interruptible(&cyapa->state_sync_lock);
@@ -385,10 +385,9 @@ static int cyapa_open(struct input_dev *input)
* when in operational mode.
*/
error = cyapa->ops->set_power_mode(cyapa,
- PWR_MODE_FULL_ACTIVE, 0);
+ PWR_MODE_FULL_ACTIVE, 0, false);
if (error) {
- dev_warn(&client->dev,
- "set active power failed: %d\n", error);
+ dev_warn(dev, "set active power failed: %d\n", error);
goto out;
}
} else {
@@ -399,11 +398,15 @@ static int cyapa_open(struct input_dev *input)
}
}

- enable_irq(client->irq);
- if (!pm_runtime_enabled(&client->dev)) {
- pm_runtime_set_active(&client->dev);
- pm_runtime_enable(&client->dev);
+ enable_irq(cyapa->client->irq);
+ if (!pm_runtime_enabled(dev)) {
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
}
+
+ pm_runtime_get_sync(dev);
+ pm_runtime_mark_last_busy(dev);
+ pm_runtime_put_sync_autosuspend(dev);
out:
mutex_unlock(&cyapa->state_sync_lock);
return error;
@@ -412,17 +415,17 @@ out:
static void cyapa_close(struct input_dev *input)
{
struct cyapa *cyapa = input_get_drvdata(input);
- struct i2c_client *client = cyapa->client;
+ struct device *dev = &cyapa->client->dev;

mutex_lock(&cyapa->state_sync_lock);

- disable_irq(client->irq);
- if (pm_runtime_enabled(&client->dev))
- pm_runtime_disable(&client->dev);
- pm_runtime_set_suspended(&client->dev);
+ disable_irq(cyapa->client->irq);
+ if (pm_runtime_enabled(dev))
+ pm_runtime_disable(dev);
+ pm_runtime_set_suspended(dev);

if (cyapa->operational)
- cyapa->ops->set_power_mode(cyapa, PWR_MODE_OFF, 0);
+ cyapa->ops->set_power_mode(cyapa, PWR_MODE_OFF, 0, false);

mutex_unlock(&cyapa->state_sync_lock);
}
@@ -533,7 +536,7 @@ static void cyapa_enable_irq_for_cmd(struct cyapa *cyapa)
*/
if (!input || cyapa->operational)
cyapa->ops->set_power_mode(cyapa,
- PWR_MODE_FULL_ACTIVE, 0);
+ PWR_MODE_FULL_ACTIVE, 0, false);
/* Gen3 always using polling mode for command. */
if (cyapa->gen >= CYAPA_GEN5)
enable_irq(cyapa->client->irq);
@@ -548,7 +551,8 @@ static void cyapa_disable_irq_for_cmd(struct cyapa *cyapa)
if (cyapa->gen >= CYAPA_GEN5)
disable_irq(cyapa->client->irq);
if (!input || cyapa->operational)
- cyapa->ops->set_power_mode(cyapa, PWR_MODE_OFF, 0);
+ cyapa->ops->set_power_mode(cyapa,
+ PWR_MODE_OFF, 0, false);
}
}

@@ -615,7 +619,7 @@ static int cyapa_initialize(struct cyapa *cyapa)

/* Power down the device until we need it. */
if (cyapa->operational)
- cyapa->ops->set_power_mode(cyapa, PWR_MODE_OFF, 0);
+ cyapa->ops->set_power_mode(cyapa, PWR_MODE_OFF, 0, false);

return 0;
}
@@ -631,7 +635,8 @@ static int cyapa_reinitialize(struct cyapa *cyapa)

/* Avoid command failures when TP was in OFF state. */
if (cyapa->operational)
- cyapa->ops->set_power_mode(cyapa, PWR_MODE_FULL_ACTIVE, 0);
+ cyapa->ops->set_power_mode(cyapa,
+ PWR_MODE_FULL_ACTIVE, 0, false);

error = cyapa_detect(cyapa);
if (error)
@@ -650,7 +655,8 @@ out:
if (!input || !input->users) {
/* Reset to power OFF state to save power when no user open. */
if (cyapa->operational)
- cyapa->ops->set_power_mode(cyapa, PWR_MODE_OFF, 0);
+ cyapa->ops->set_power_mode(cyapa,
+ PWR_MODE_OFF, 0, false);
} else if (!error && cyapa->operational) {
/*
* Make sure only enable runtime PM when device is
@@ -658,6 +664,10 @@ out:
*/
pm_runtime_set_active(dev);
pm_runtime_enable(dev);
+
+ pm_runtime_get_sync(dev);
+ pm_runtime_mark_last_busy(dev);
+ pm_runtime_put_sync_autosuspend(dev);
}

return error;
@@ -667,8 +677,8 @@ static irqreturn_t cyapa_irq(int irq, void *dev_id)
{
struct cyapa *cyapa = dev_id;
struct device *dev = &cyapa->client->dev;
+ int error;

- pm_runtime_get_sync(dev);
if (device_may_wakeup(dev))
pm_wakeup_event(dev, 0);

@@ -687,7 +697,24 @@ static irqreturn_t cyapa_irq(int irq, void *dev_id)
goto out;
}

- if (!cyapa->operational || cyapa->ops->irq_handler(cyapa)) {
+ if (cyapa->operational) {
+ error = cyapa->ops->irq_handler(cyapa);
+
+ /*
+ * Apply runtime power management to touch report event
+ * except the events caused by the command responses.
+ * Note:
+ * It will introduce about 20~40 ms additional delay
+ * time in receiving for first valid touch report data.
+ * The time is used to execute device runtime resume
+ * process.
+ */
+ pm_runtime_get_sync(dev);
+ pm_runtime_mark_last_busy(dev);
+ pm_runtime_put_sync_autosuspend(dev);
+ }
+
+ if (!cyapa->operational || error) {
if (!mutex_trylock(&cyapa->state_sync_lock)) {
cyapa->ops->sort_empty_output_data(cyapa,
NULL, NULL, NULL);
@@ -699,8 +726,6 @@ static irqreturn_t cyapa_irq(int irq, void *dev_id)
}

out:
- pm_runtime_mark_last_busy(dev);
- pm_runtime_put_sync_autosuspend(dev);
return IRQ_HANDLED;
}

@@ -1341,7 +1366,7 @@ static int __maybe_unused cyapa_suspend(struct device *dev)
power_mode = device_may_wakeup(dev) ? cyapa->suspend_power_mode
: PWR_MODE_OFF;
error = cyapa->ops->set_power_mode(cyapa, power_mode,
- cyapa->suspend_sleep_time);
+ cyapa->suspend_sleep_time, true);
if (error)
dev_err(dev, "suspend set power mode failed: %d\n",
error);
@@ -1395,7 +1420,8 @@ static int __maybe_unused cyapa_runtime_suspend(struct device *dev)

error = cyapa->ops->set_power_mode(cyapa,
cyapa->runtime_suspend_power_mode,
- cyapa->runtime_suspend_sleep_time);
+ cyapa->runtime_suspend_sleep_time,
+ false);
if (error)
dev_warn(dev, "runtime suspend failed: %d\n", error);

@@ -1407,7 +1433,8 @@ static int __maybe_unused cyapa_runtime_resume(struct device *dev)
struct cyapa *cyapa = dev_get_drvdata(dev);
int error;

- error = cyapa->ops->set_power_mode(cyapa, PWR_MODE_FULL_ACTIVE, 0);
+ error = cyapa->ops->set_power_mode(cyapa,
+ PWR_MODE_FULL_ACTIVE, 0, false);
if (error)
dev_warn(dev, "runtime resume failed: %d\n", error);

diff --git a/drivers/input/mouse/cyapa.h b/drivers/input/mouse/cyapa.h
index 203d7a2..a734ab8 100644
--- a/drivers/input/mouse/cyapa.h
+++ b/drivers/input/mouse/cyapa.h
@@ -273,7 +273,7 @@ struct cyapa_dev_ops {
int (*sort_empty_output_data)(struct cyapa *,
u8 *, int *, cb_sort);

- int (*set_power_mode)(struct cyapa *, u8, u16);
+ int (*set_power_mode)(struct cyapa *, u8, u16, bool);

int (*set_proximity)(struct cyapa *, bool);
};
diff --git a/drivers/input/mouse/cyapa_gen3.c b/drivers/input/mouse/cyapa_gen3.c
index 6460beb..1274b3f 100644
--- a/drivers/input/mouse/cyapa_gen3.c
+++ b/drivers/input/mouse/cyapa_gen3.c
@@ -950,7 +950,7 @@ static u16 cyapa_get_wait_time_for_pwr_cmd(u8 pwr_mode)
* Device power mode can only be set when device is in operational mode.
*/
static int cyapa_gen3_set_power_mode(struct cyapa *cyapa, u8 power_mode,
- u16 always_unused)
+ u16 always_unused, bool is_suspend_unused)
{
int ret;
u8 power;
@@ -1107,7 +1107,7 @@ static int cyapa_gen3_do_operational_check(struct cyapa *cyapa)
* may cause problems, so we set the power mode first here.
*/
error = cyapa_gen3_set_power_mode(cyapa,
- PWR_MODE_FULL_ACTIVE, 0);
+ PWR_MODE_FULL_ACTIVE, 0, false);
if (error)
dev_err(dev, "%s: set full power mode failed: %d\n",
__func__, error);
diff --git a/drivers/input/mouse/cyapa_gen5.c b/drivers/input/mouse/cyapa_gen5.c
index 519d437..e311b1b 100644
--- a/drivers/input/mouse/cyapa_gen5.c
+++ b/drivers/input/mouse/cyapa_gen5.c
@@ -19,6 +19,7 @@
#include <linux/slab.h>
#include <asm/unaligned.h>
#include <linux/crc-itu-t.h>
+#include <linux/pm_runtime.h>
#include "cyapa.h"


@@ -1565,7 +1566,7 @@ int cyapa_pip_deep_sleep(struct cyapa *cyapa, u8 state)
}

static int cyapa_gen5_set_power_mode(struct cyapa *cyapa,
- u8 power_mode, u16 sleep_time)
+ u8 power_mode, u16 sleep_time, bool is_suspend)
{
struct device *dev = &cyapa->client->dev;
u8 power_state;
@@ -1574,9 +1575,6 @@ static int cyapa_gen5_set_power_mode(struct cyapa *cyapa,
if (cyapa->state != CYAPA_STATE_GEN5_APP)
return 0;

- /* Dump all the report data before do power mode commmands. */
- cyapa_empty_pip_output_data(cyapa, NULL, NULL, NULL);
-
if (PIP_DEV_GET_PWR_STATE(cyapa) == UNINIT_PWR_MODE) {
/*
* Assume TP in deep sleep mode when driver is loaded,
@@ -1679,8 +1677,8 @@ static int cyapa_gen5_set_power_mode(struct cyapa *cyapa,
* is suspending which may cause interrupt line unable to be
* asserted again.
*/
- cyapa_empty_pip_output_data(cyapa, NULL, NULL, NULL);
- cyapa_gen5_disable_pip_report(cyapa);
+ if (is_suspend)
+ cyapa_gen5_disable_pip_report(cyapa);

PIP_DEV_SET_PWR_STATE(cyapa,
cyapa_sleep_time_to_pwr_cmd(sleep_time));
@@ -2515,7 +2513,7 @@ static int cyapa_gen5_do_operational_check(struct cyapa *cyapa)
* the device state is required.
*/
error = cyapa_gen5_set_power_mode(cyapa,
- PWR_MODE_FULL_ACTIVE, 0);
+ PWR_MODE_FULL_ACTIVE, 0, false);
if (error)
dev_warn(dev, "%s: failed to set power active mode.\n",
__func__);
@@ -2757,7 +2755,16 @@ int cyapa_pip_irq_handler(struct cyapa *cyapa)
/*
* Device wake event from deep sleep mode for touch.
* This interrupt event is used to wake system up.
+ *
+ * Note:
+ * It will introduce about 20~40 ms additional delay
+ * time in receiving for first valid touch report data.
+ * The time is used to execute device runtime resume
+ * process.
*/
+ pm_runtime_get_sync(dev);
+ pm_runtime_mark_last_busy(dev);
+ pm_runtime_put_sync_autosuspend(dev);
return 0;
} else if (report_id != PIP_TOUCH_REPORT_ID &&
report_id != PIP_BTN_REPORT_ID &&
diff --git a/drivers/input/mouse/cyapa_gen6.c b/drivers/input/mouse/cyapa_gen6.c
index e97c1b5..f2287ed 100644
--- a/drivers/input/mouse/cyapa_gen6.c
+++ b/drivers/input/mouse/cyapa_gen6.c
@@ -429,7 +429,7 @@ static int cyapa_gen6_deep_sleep(struct cyapa *cyapa, u8 state)
}

static int cyapa_gen6_set_power_mode(struct cyapa *cyapa,
- u8 power_mode, u16 sleep_time)
+ u8 power_mode, u16 sleep_time, bool is_suspend)
{
struct device *dev = &cyapa->client->dev;
struct gen6_interval_setting *interval_setting =
@@ -690,7 +690,7 @@ static int cyapa_gen6_operational_check(struct cyapa *cyapa)
* the device state is required.
*/
error = cyapa_gen6_set_power_mode(cyapa,
- PWR_MODE_FULL_ACTIVE, 0);
+ PWR_MODE_FULL_ACTIVE, 0, false);
if (error)
dev_warn(dev, "%s: failed to set power active mode.\n",
__func__);
--
1.9.1


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