diff options
Diffstat (limited to 'drivers/media/platform/vivid/vivid-cec.c')
| -rw-r--r-- | drivers/media/platform/vivid/vivid-cec.c | 66 |
1 files changed, 64 insertions, 2 deletions
diff --git a/drivers/media/platform/vivid/vivid-cec.c b/drivers/media/platform/vivid/vivid-cec.c index e15705758969..b55d278d38a7 100644 --- a/drivers/media/platform/vivid/vivid-cec.c +++ b/drivers/media/platform/vivid/vivid-cec.c @@ -22,6 +22,15 @@ #include "vivid-core.h" #include "vivid-cec.h" +#define CEC_TIM_START_BIT_TOTAL 4500 +#define CEC_TIM_START_BIT_LOW 3700 +#define CEC_TIM_START_BIT_HIGH 800 +#define CEC_TIM_DATA_BIT_TOTAL 2400 +#define CEC_TIM_DATA_BIT_0_LOW 1500 +#define CEC_TIM_DATA_BIT_0_HIGH 900 +#define CEC_TIM_DATA_BIT_1_LOW 600 +#define CEC_TIM_DATA_BIT_1_HIGH 1800 + void vivid_cec_bus_free_work(struct vivid_dev *dev) { spin_lock(&dev->cec_slock); @@ -64,6 +73,58 @@ static bool vivid_cec_find_dest_adap(struct vivid_dev *dev, return false; } +static void vivid_cec_pin_adap_events(struct cec_adapter *adap, ktime_t ts, + const struct cec_msg *msg, bool nacked) +{ + unsigned int len = nacked ? 1 : msg->len; + unsigned int i; + bool bit; + + if (adap == NULL) + return; + ts = ktime_sub_us(ts, (CEC_TIM_START_BIT_TOTAL + + len * 10 * CEC_TIM_DATA_BIT_TOTAL)); + cec_queue_pin_cec_event(adap, false, ts); + ts = ktime_add_us(ts, CEC_TIM_START_BIT_LOW); + cec_queue_pin_cec_event(adap, true, ts); + ts = ktime_add_us(ts, CEC_TIM_START_BIT_HIGH); + + for (i = 0; i < 10 * len; i++) { + switch (i % 10) { + case 0 ... 7: + bit = msg->msg[i / 10] & (0x80 >> (i % 10)); + break; + case 8: /* EOM */ + bit = i / 10 == msg->len - 1; + break; + case 9: /* ACK */ + bit = cec_msg_is_broadcast(msg) ^ nacked; + break; + } + cec_queue_pin_cec_event(adap, false, ts); + if (bit) + ts = ktime_add_us(ts, CEC_TIM_DATA_BIT_1_LOW); + else + ts = ktime_add_us(ts, CEC_TIM_DATA_BIT_0_LOW); + cec_queue_pin_cec_event(adap, true, ts); + if (bit) + ts = ktime_add_us(ts, CEC_TIM_DATA_BIT_1_HIGH); + else + ts = ktime_add_us(ts, CEC_TIM_DATA_BIT_0_HIGH); + } +} + +static void vivid_cec_pin_events(struct vivid_dev *dev, + const struct cec_msg *msg, bool nacked) +{ + ktime_t ts = ktime_get(); + unsigned int i; + + vivid_cec_pin_adap_events(dev->cec_rx_adap, ts, msg, nacked); + for (i = 0; i < MAX_OUTPUTS; i++) + vivid_cec_pin_adap_events(dev->cec_tx_adap[i], ts, msg, nacked); +} + static void vivid_cec_xfer_done_worker(struct work_struct *work) { struct vivid_cec_work *cw = @@ -84,6 +145,7 @@ static void vivid_cec_xfer_done_worker(struct work_struct *work) dev->cec_xfer_start_jiffies = 0; list_del(&cw->list); spin_unlock(&dev->cec_slock); + vivid_cec_pin_events(dev, &cw->msg, !valid_dest); cec_transmit_attempt_done(cw->adap, cw->tx_status); /* Broadcast message */ @@ -118,6 +180,7 @@ static void vivid_cec_xfer_try_worker(struct work_struct *work) static int vivid_cec_adap_enable(struct cec_adapter *adap, bool enable) { + adap->cec_pin_is_high = true; return 0; } @@ -219,8 +282,7 @@ struct cec_adapter *vivid_cec_alloc_adap(struct vivid_dev *dev, bool is_source) { char name[sizeof(dev->vid_out_dev.name) + 2]; - u32 caps = CEC_CAP_TRANSMIT | CEC_CAP_LOG_ADDRS | - CEC_CAP_PASSTHROUGH | CEC_CAP_RC | CEC_CAP_MONITOR_ALL; + u32 caps = CEC_CAP_DEFAULTS | CEC_CAP_MONITOR_ALL | CEC_CAP_MONITOR_PIN; snprintf(name, sizeof(name), "%s%d", is_source ? dev->vid_out_dev.name : dev->vid_cap_dev.name, |