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drm/rockchip: ebc_dev: tps68185: optimize the power up sequence.

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Only do the i2c configs at the first time or after entering suspend
mode, and add mutex protect during suspend and resume.

Signed-off-by: Wenping Zhang <wenping.zhang@rock-chips.com>
Change-Id: Id3e16da88c526332238682421976a43c5974c936
This commit is contained in:
Wenping Zhang
2021-01-26 07:40:49 +00:00
committed by Tao Huang
parent adafb5ebfb
commit ed6cd522c1
1 changed files with 33 additions and 11 deletions
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44
drivers/gpu/drm/rockchip/ebc-dev/pmic/tps65185.c
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@@ -130,6 +130,7 @@ struct papyrus_hw_state {
uint8_t int_status2;
uint8_t pg_status;
};
static bool papyrus_need_reconfig = true;
static int papyrus_hw_setreg(struct papyrus_sess *sess, uint8_t regaddr, uint8_t val)
{
@@ -239,8 +240,6 @@ static void papyrus_hw_send_powerup(struct papyrus_sess *sess)
{
int stat = 0;
mutex_lock(&sess->power_lock);
stat |= papyrus_hw_setreg(sess, PAPYRUS_ADDR_VADJ, sess->vadj);
stat |= papyrus_hw_setreg(sess, PAPYRUS_ADDR_UPSEQ0, sess->upseq0);
@@ -259,6 +258,8 @@ static void papyrus_hw_send_powerup(struct papyrus_sess *sess)
stat |= papyrus_hw_setreg(sess, PAPYRUS_ADDR_ENABLE, sess->enable_reg_shadow);
if (stat)
dev_err(&sess->client->dev, "i2c error: %d\n", stat);
if (!IS_ERR_OR_NULL(sess->pwr_up_pin))
gpiod_direction_output(sess->pwr_up_pin, 1);
return;
}
@@ -276,7 +277,6 @@ static void papyrus_hw_send_powerdown(struct papyrus_sess *sess)
if (stat)
dev_err(&sess->client->dev, "i2c error: %d\n", stat);
mutex_unlock(&sess->power_lock);
return;
}
@@ -387,16 +387,32 @@ static void papyrus_hw_power_req(struct ebc_pmic *pmic, bool up)
{
struct papyrus_sess *sess = (struct papyrus_sess *)pmic->drvpar;
if (up) {
papyrus_hw_send_powerup(sess);
papyrus_hw_power_ack(sess, up);
enable_irq(sess->irq);
if (up)
mutex_lock(&sess->power_lock);
if (papyrus_need_reconfig) {
if (up) {
papyrus_hw_send_powerup(sess);
papyrus_hw_power_ack(sess, up);
enable_irq(sess->irq);
} else {
disable_irq(sess->irq);
papyrus_hw_send_powerdown(sess);
papyrus_hw_power_ack(sess, up);
}
papyrus_need_reconfig = false;
} else {
disable_irq(sess->irq);
papyrus_hw_send_powerdown(sess);
papyrus_hw_power_ack(sess, up);
if (up) {
if (!IS_ERR_OR_NULL(sess->pwr_up_pin))
gpiod_direction_output(sess->pwr_up_pin, 1);
enable_irq(sess->irq);
} else {
disable_irq(sess->irq);
if (!IS_ERR_OR_NULL(sess->pwr_up_pin))
gpiod_direction_output(sess->pwr_up_pin, 0);
}
}
if (!up)
mutex_unlock(&sess->power_lock);
return;
}
@@ -461,23 +477,29 @@ static int papyrus_hw_vcom_set(struct ebc_pmic *pmic, int vcom_mv)
static void papyrus_pm_sleep(struct ebc_pmic *pmic)
{
struct papyrus_sess *s = (struct papyrus_sess *)pmic->drvpar;
mutex_lock(&s->power_lock);
gpiod_direction_output(s->vcom_ctl_pin, 0);
gpiod_direction_output(s->wake_up_pin, 0);
if (!IS_ERR_OR_NULL(s->pwr_en_pin))
gpiod_direction_output(s->pwr_en_pin, 0);
papyrus_need_reconfig = true;
mutex_unlock(&s->power_lock);
}
static void papyrus_pm_resume(struct ebc_pmic *pmic)
{
struct papyrus_sess *s = (struct papyrus_sess *)pmic->drvpar;
mutex_lock(&s->power_lock);
if (!IS_ERR_OR_NULL(s->pwr_en_pin)) {
gpiod_direction_output(s->pwr_en_pin, 1);
usleep_range(10 * 1000, 11 * 1000);
}
gpiod_direction_output(s->wake_up_pin, 1);
gpiod_direction_output(s->vcom_ctl_pin, 1);
mutex_unlock(&s->power_lock);
}
static int papyrus_probe(struct ebc_pmic *pmic, struct i2c_client *client)