diff options
Diffstat (limited to 'driver')
| -rw-r--r-- | driver/touchpad_st.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/driver/touchpad_st.c b/driver/touchpad_st.c index 4f7292e445..9704e8c0ac 100644 --- a/driver/touchpad_st.c +++ b/driver/touchpad_st.c @@ -67,6 +67,13 @@ static int tp_control; #define TP_CONTROL_SHALL_RESET (1 << 1) #define TP_CONTROL_SHALL_INITIALIZE (1 << 2) +/* + * Number of times we have reset the touchpad because of errors. + */ +static int tp_reset_retry_count; + +#define MAX_TP_RESET_RETRY_COUNT 3 + static int dump_memory_on_error; /* @@ -636,6 +643,20 @@ static int st_tp_handle_error_report(struct st_tp_event_t *e, } /* + * When 0xFF is received, it's very likely ST touchpad is down. + * Try if touchpad can be recovered by reset. + */ + if (error_type == 0xFF) { + if (tp_reset_retry_count < MAX_TP_RESET_RETRY_COUNT) { + tp_control |= TP_CONTROL_SHALL_RESET; + tp_reset_retry_count++; + } else { + tp_control |= TP_CONTROL_SHALL_HALT; + } + return 1; + } + + /* * Otherwise, just ignore it. */ return 0; @@ -695,6 +716,7 @@ static int st_tp_reset(void) if (e->evt_id == ST_TP_EVENT_ID_CONTROLLER_READY) { CPRINTS("Touchpad ready"); + tp_reset_retry_count = 0; return 0; } } |