evie/android_kernel_oneplus_msm8998
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Merge "msm: mdss: fix spurious wait4pingpong timeouts"

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Linux Build Service Account 2016-08-11 12:48:58 -07:00 • committed by Gerrit - the friendly Code Review server
commit db4b424be4
2 changed files with 23 additions and 4 deletions
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3
drivers/video/fbdev/msm/mdss_mdp.h
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@ -56,7 +56,8 @@
#define C0_G_Y 0 /* G/luma */
/* wait for at most 2 vsync for lowest refresh rate (24hz) */
#define KOFF_TIMEOUT msecs_to_jiffies(84)
#define KOFF_TIMEOUT_MS 84
#define KOFF_TIMEOUT msecs_to_jiffies(KOFF_TIMEOUT_MS)
#define OVERFETCH_DISABLE_TOP BIT(0)
#define OVERFETCH_DISABLE_BOTTOM BIT(1)

24
drivers/video/fbdev/msm/mdss_mdp_intf_cmd.c
View file

@ -1835,6 +1835,26 @@ int mdss_mdp_cmd_reconfigure_splash_done(struct mdss_mdp_ctl *ctl,
return ret;
}
static int __mdss_mdp_wait4pingpong(struct mdss_mdp_cmd_ctx *ctx)
{
int rc = 0;
s64 expected_time = ktime_to_ms(ktime_get()) + KOFF_TIMEOUT_MS;
s64 time;
do {
rc = wait_event_timeout(ctx->pp_waitq,
atomic_read(&ctx->koff_cnt) == 0,
KOFF_TIMEOUT);
time = ktime_to_ms(ktime_get());
MDSS_XLOG(rc, time, expected_time, atomic_read(&ctx->koff_cnt));
/* If we timed out, counter is valid and time is less, wait again */
} while (atomic_read(&ctx->koff_cnt) && (rc == 0) &&
(time < expected_time));
return rc;
}
static int mdss_mdp_cmd_wait4pingpong(struct mdss_mdp_ctl *ctl, void *arg)
{
struct mdss_mdp_cmd_ctx *ctx;
@ -1856,9 +1876,7 @@ static int mdss_mdp_cmd_wait4pingpong(struct mdss_mdp_ctl *ctl, void *arg)
pr_debug("%s: intf_num=%d ctx=%p koff_cnt=%d\n", __func__,
ctl->intf_num, ctx, atomic_read(&ctx->koff_cnt));
rc = wait_event_timeout(ctx->pp_waitq,
atomic_read(&ctx->koff_cnt) == 0,
KOFF_TIMEOUT);
rc = __mdss_mdp_wait4pingpong(ctx);
trace_mdp_cmd_wait_pingpong(ctl->num,
atomic_read(&ctx->koff_cnt));