A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-11 15:11:48 -04:00
Code Issues Projects Releases Packages Wiki Activity

Merge "serial: msm_geni_serial: Reduce stale delay added in stop_rx_sequencer"

Browse source
This commit is contained in:
qctecmdr 2021-08-17 16:40:15 -07:00 • committed by Gerrit - the friendly Code Review server
commit b156bf984c
1 changed files with 6 additions and 10 deletions
Download patch file Download diff file Expand all files Collapse all files

16
drivers/tty/serial/msm_geni_serial.c
View file

@ -106,7 +106,7 @@
#define STALE_TIMEOUT (16)
#define STALE_COUNT (DEFAULT_BITS_PER_CHAR * STALE_TIMEOUT)
#define SEC_TO_USEC (1000000)
#define SYSTEM_DELAY (500)
#define STALE_DELAY (10000) //10msec
#define DEFAULT_BITS_PER_CHAR (10)
#define GENI_UART_NR_PORTS (6)
#define GENI_UART_CONS_PORTS (1)
@ -1559,7 +1559,6 @@ static int stop_rx_sequencer(struct uart_port *uport)
struct msm_geni_serial_port *port = GET_DEV_PORT(uport);
unsigned long flags = 0;
bool is_rx_active;
unsigned int stale_delay;
u32 dma_rx_status, s_irq_status;
int usage_count;
@ -1576,15 +1575,12 @@ static int stop_rx_sequencer(struct uart_port *uport)
if (!uart_console(uport)) {
/*
* Wait for the stale timeout to happen if there
* is any data pending in the rx fifo.
* Have a safety factor of 2 to include the interrupt
* and system latencies, add 500usec delay for interrupt
* latency or system delay.
* Wait for the stale timeout around 10msec to happen
* if there is any data pending in the rx fifo.
* This will help to handle incoming rx data in stop_rx_sequencer
* for interrupt latency or system delay cases.
*/
stale_delay = (STALE_COUNT * SEC_TO_USEC) / port->cur_baud;
stale_delay = (2 * stale_delay) + SYSTEM_DELAY;
udelay(stale_delay);
udelay(STALE_DELAY);
dma_rx_status = geni_read_reg_nolog(uport->membase,
SE_DMA_RX_IRQ_STAT);