diff options
Diffstat (limited to 'drivers/input/touchscreen')
| -rw-r--r-- | drivers/input/touchscreen/st1232.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/input/touchscreen/st1232.c b/drivers/input/touchscreen/st1232.c index 4ab371358b3..8825fe37d43 100644 --- a/drivers/input/touchscreen/st1232.c +++ b/drivers/input/touchscreen/st1232.c @@ -23,6 +23,7 @@ #include <linux/input.h> #include <linux/interrupt.h> #include <linux/module.h> +#include <linux/pm_qos.h> #include <linux/slab.h> #include <linux/types.h> @@ -46,6 +47,7 @@ struct st1232_ts_data { struct i2c_client *client; struct input_dev *input_dev; struct st1232_ts_finger finger[MAX_FINGERS]; + struct dev_pm_qos_request low_latency_req; }; static int st1232_ts_read_data(struct st1232_ts_data *ts) @@ -118,8 +120,17 @@ static irqreturn_t st1232_ts_irq_handler(int irq, void *dev_id) } /* SYN_MT_REPORT only if no contact */ - if (!count) + if (!count) { input_mt_sync(input_dev); + if (ts->low_latency_req.dev) { + dev_pm_qos_remove_request(&ts->low_latency_req); + ts->low_latency_req.dev = NULL; + } + } else if (!ts->low_latency_req.dev) { + /* First contact, request 100 us latency. */ + dev_pm_qos_add_ancestor_request(&ts->client->dev, + &ts->low_latency_req, 100); + } /* SYN_REPORT */ input_sync(input_dev); |