evie/android_kernel_oneplus_msm8998
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msm_serial_hs: make the Bluetooth tty thread RT

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For Bluetooth, the tty kthread should be RT in order to avoid scheduling
delays.

Bug: 36106419
Test: play bluetooth audio, verify tty kthread runs at RT via systrace
Change-Id: I441dd10d22f8831d055166bcd1ff9f01e5ca13d4
Signed-off-by: Philip Cuadra <philipcuadra@google.com>
This commit is contained in:
Philip Cuadra 2017-06-12 15:47:19 -07:00 • committed by Timi
parent 0e265e1562
commit 5459b384f2
1 changed files with 2 additions and 0 deletions
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2
drivers/tty/serial/msm_serial_hs.c
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@ -62,6 +62,7 @@
#include <linux/ipc_logging.h> #include <linux/ipc_logging.h>
#include <asm/irq.h> #include <asm/irq.h>
#include <linux/kthread.h> #include <linux/kthread.h>
#include <uapi/linux/sched.h>
#include <linux/msm-sps.h> #include <linux/msm-sps.h>
#include <linux/platform_data/msm_serial_hs.h> #include <linux/platform_data/msm_serial_hs.h>
@ -3394,6 +3395,7 @@ static void msm_serial_hs_rt_init(struct uart_port *uport)
msm_uport->pm_state = MSM_HS_PM_SUSPENDED; msm_uport->pm_state = MSM_HS_PM_SUSPENDED;
mutex_unlock(&msm_uport->mtx); mutex_unlock(&msm_uport->mtx);
pm_runtime_enable(uport->dev); pm_runtime_enable(uport->dev);
tty_port_set_policy(&uport->state->port, SCHED_FIFO, 1);
} }
static int msm_hs_runtime_suspend(struct device *dev) static int msm_hs_runtime_suspend(struct device *dev)