diff options
| -rw-r--r-- | drivers/tty/serial/fsl_lpuart.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index c5ad567cab8..5fde6da6ba2 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -720,13 +720,6 @@ static int lpuart_dma_rx_request(struct uart_port *port) sport->dma_rx_buf_bus = dma_bus; sport->dma_rx_in_progress = 0; - sport->dma_rx_timeout = (sport->port.timeout - HZ / 50) * - FSL_UART_RX_DMA_BUFFER_SIZE * 3 / - sport->rxfifo_size / 2; - - if (sport->dma_rx_timeout < msecs_to_jiffies(20)) - sport->dma_rx_timeout = msecs_to_jiffies(20); - return 0; } @@ -918,6 +911,17 @@ lpuart_set_termios(struct uart_port *port, struct ktermios *termios, /* update the per-port timeout */ uart_update_timeout(port, termios->c_cflag, baud); + if (sport->lpuart_dma_use) { + /* Calculate delay for 1.5 DMA buffers */ + sport->dma_rx_timeout = (sport->port.timeout - HZ / 50) * + FSL_UART_RX_DMA_BUFFER_SIZE * 3 / + sport->rxfifo_size / 2; + dev_dbg(port->dev, "DMA Rx t-out %ums, tty t-out %u jiffies\n", + sport->dma_rx_timeout * 1000 / HZ, sport->port.timeout); + if (sport->dma_rx_timeout < msecs_to_jiffies(20)) + sport->dma_rx_timeout = msecs_to_jiffies(20); + } + /* wait transmit engin complete */ while (!(readb(sport->port.membase + UARTSR1) & UARTSR1_TC)) barrier(); |