| Message ID | 1621301832-25479-1-git-send-email-johnny.chuang.emc@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Jiri Kosina |
| Headers | show |
| Series | [v2] HID: i2c-hid: Add I2C_HID_QUIRK_NO_DELAY_AFTER_PWR_ON to optimize timing | expand |
On Mon, 17 May 2021 at 18:37, Johnny Chuang <johnny.chuang.emc@gmail.com> wrote: > > There is a hard coding 60ms delay after I2C_HID_PWR_ON commadn. > Elan didn't need the delay, so we add a quirk to reduce boot time and resume time. > > Fixed: eef4016243e9("HID: i2c-hid: Always sleep 60ms after I2C_HID_PWR_ON commands") > > Signed-off-by: Johnny Chuang <johnny.chuang.emc@gmail.com> Reviewed-by: Harry Cutts <hcutts@chromium.org> > --- > Change in v2: > - Modify Optimized tag to Fixed tag > - Modify comment for i2c_hid_quirks > --- > drivers/hid/i2c-hid/i2c-hid-core.c | 9 ++++++++- > 1 file changed, 8 insertions(+), 1 deletion(-) > > diff --git a/drivers/hid/i2c-hid/i2c-hid-core.c b/drivers/hid/i2c-hid/i2c-hid-core.c > index 9993133..f4ee690 100644 > --- a/drivers/hid/i2c-hid/i2c-hid-core.c > +++ b/drivers/hid/i2c-hid/i2c-hid-core.c > @@ -45,6 +45,7 @@ > #define I2C_HID_QUIRK_BOGUS_IRQ BIT(4) > #define I2C_HID_QUIRK_RESET_ON_RESUME BIT(5) > #define I2C_HID_QUIRK_BAD_INPUT_SIZE BIT(6) > +#define I2C_HID_QUIRK_NO_DELAY_AFTER_PWR_ON BIT(8) > > > /* flags */ > @@ -178,6 +179,11 @@ static const struct i2c_hid_quirks { > I2C_HID_QUIRK_RESET_ON_RESUME }, > { USB_VENDOR_ID_ITE, I2C_DEVICE_ID_ITE_LENOVO_LEGION_Y720, > I2C_HID_QUIRK_BAD_INPUT_SIZE }, > + /* > + * Elan devices don't need delay after I2C_HID_PWR_ON > + */ > + { USB_VENDOR_ID_ELAN, HID_ANY_ID, > + I2C_HID_QUIRK_NO_DELAY_AFTER_PWR_ON }, > { 0, 0 } > }; > > @@ -427,7 +433,8 @@ static int i2c_hid_set_power(struct i2c_client *client, int power_state) > * PWR_ON requests. Testing has confirmed that several devices > * will not work properly without a delay after a PWR_ON request. > */ > - if (!ret && power_state == I2C_HID_PWR_ON) > + if (!ret && power_state == I2C_HID_PWR_ON && > + !(ihid->quirks & I2C_HID_QUIRK_NO_DELAY_AFTER_PWR_ON)) > msleep(60); > > return ret; > -- > 2.7.4 >
diff --git a/drivers/hid/i2c-hid/i2c-hid-core.c b/drivers/hid/i2c-hid/i2c-hid-core.c index 9993133..f4ee690 100644 --- a/drivers/hid/i2c-hid/i2c-hid-core.c +++ b/drivers/hid/i2c-hid/i2c-hid-core.c @@ -45,6 +45,7 @@ #define I2C_HID_QUIRK_BOGUS_IRQ BIT(4) #define I2C_HID_QUIRK_RESET_ON_RESUME BIT(5) #define I2C_HID_QUIRK_BAD_INPUT_SIZE BIT(6) +#define I2C_HID_QUIRK_NO_DELAY_AFTER_PWR_ON BIT(8) /* flags */ @@ -178,6 +179,11 @@ static const struct i2c_hid_quirks { I2C_HID_QUIRK_RESET_ON_RESUME }, { USB_VENDOR_ID_ITE, I2C_DEVICE_ID_ITE_LENOVO_LEGION_Y720, I2C_HID_QUIRK_BAD_INPUT_SIZE }, + /* + * Elan devices don't need delay after I2C_HID_PWR_ON + */ + { USB_VENDOR_ID_ELAN, HID_ANY_ID, + I2C_HID_QUIRK_NO_DELAY_AFTER_PWR_ON }, { 0, 0 } }; @@ -427,7 +433,8 @@ static int i2c_hid_set_power(struct i2c_client *client, int power_state) * PWR_ON requests. Testing has confirmed that several devices * will not work properly without a delay after a PWR_ON request. */ - if (!ret && power_state == I2C_HID_PWR_ON) + if (!ret && power_state == I2C_HID_PWR_ON && + !(ihid->quirks & I2C_HID_QUIRK_NO_DELAY_AFTER_PWR_ON)) msleep(60); return ret;
There is a hard coding 60ms delay after I2C_HID_PWR_ON commadn. Elan didn't need the delay, so we add a quirk to reduce boot time and resume time. Fixed: eef4016243e9("HID: i2c-hid: Always sleep 60ms after I2C_HID_PWR_ON commands") Signed-off-by: Johnny Chuang <johnny.chuang.emc@gmail.com> --- Change in v2: - Modify Optimized tag to Fixed tag - Modify comment for i2c_hid_quirks --- drivers/hid/i2c-hid/i2c-hid-core.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-)