diff options
Diffstat (limited to 'drivers/serial/tegra_hsuart.c')
| -rwxr-xr-x | drivers/serial/tegra_hsuart.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/serial/tegra_hsuart.c b/drivers/serial/tegra_hsuart.c index 941593ef7318..2f55ade6995d 100755 --- a/drivers/serial/tegra_hsuart.c +++ b/drivers/serial/tegra_hsuart.c @@ -51,7 +51,7 @@ #define BYTES_TO_ALIGN(x) ((unsigned long)(ALIGN((x), sizeof(u32))) - \ (unsigned long)(x)) -#define UART_RX_DMA_BUFFER_SIZE (2048*4) +#define UART_RX_DMA_BUFFER_SIZE (2048*16) #define UART_LSR_FIFOE 0x80 #define UART_IER_EORD 0x20 @@ -411,11 +411,21 @@ static void do_handle_rx_dma(struct tegra_uart_port *t) set_rts(t, true); } else { is_dma_stopped = false; + /* Want to get the transfer count by dma so dont want more + * data to be in at this time.*/ + if (t->rts_active) + set_rts(t, false); + /* Wait for dma to update status on current burst */ + udelay(WAITTIME_DMA_BURST_COMPLETE); + dma_trans_count = tegra_dma_get_transfer_count(t->rx_dma, &t->rx_dma_req, false); if (dma_trans_count < 0) { return; } + /* enable the rts now */ + if (t->rts_active) + set_rts(t, true); dma_read_count = copy_dma_buffer_to_tty_buffer(t, dma_trans_count); } |