evie/android_kernel_oneplus_msm8998
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msm: mdss: reduce waiting time before turn off mdp clock

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Vsync happens at every 16.6 ms. Currently it waits for
6 vsyncs (100 ms) time before turning off mdp clock if
there is no new frame update. During suspend procedure,
change it to 1 so that mdp clock is turned off 1 vsync
after kickoff has completed if there is kickoff pending.
Otherwise mdp clock is turned off at next vsync.

Change-Id: Ibb000b04cb4204ff63647dda3146c55084330687
Signed-off-by: Kuogee Hsieh <khsieh@codeaurora.org>
This commit is contained in:
Kuogee Hsieh 2014-10-21 10:14:13 -07:00 • committed by David Keitel
parent 5f14a4369d
commit b6d1c8645c
1 changed files with 23 additions and 0 deletions
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23
drivers/video/fbdev/msm/mdss_mdp_intf_cmd.c
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@ -41,6 +41,7 @@ struct mdss_mdp_cmd_ctx {
struct list_head vsync_handlers;
int panel_power_state;
atomic_t koff_cnt;
u32 intf_stopped;
int clk_enabled;
int vsync_enabled;
int rdptr_enabled;
@ -760,6 +761,11 @@ int mdss_mdp_cmd_kickoff(struct mdss_mdp_ctl *ctl, void *arg)
return -ENODEV;
}
if (ctx->intf_stopped) {
pr_err("ctx=%d stopped already\n", ctx->pp_num);
return -EPERM;
}
/* sctl will be null for right only in the case of Partial update */
sctl = mdss_mdp_get_split_ctl(ctl);
@ -845,6 +851,8 @@ int mdss_mdp_cmd_restore(struct mdss_mdp_ctl *ctl)
int mdss_mdp_cmd_intfs_stop(struct mdss_mdp_ctl *ctl, int session,
int panel_power_state)
{
struct mdss_mdp_ctl *sctl = NULL;
struct mdss_mdp_cmd_ctx *sctx = NULL;
struct mdss_mdp_cmd_ctx *ctx;
unsigned long flags;
int need_wait = 0;
@ -861,6 +869,10 @@ int mdss_mdp_cmd_intfs_stop(struct mdss_mdp_ctl *ctl, int session,
return ret;
}
sctl = mdss_mdp_get_split_ctl(ctl);
if (sctl)
sctx = (struct mdss_mdp_cmd_ctx *) sctl->priv_data;
ctx = &mdss_mdp_cmd_ctx_list[session];
if (!ctx->ref_cnt) {
pr_err("invalid ctx session: %d\n", session);
@ -868,10 +880,19 @@ int mdss_mdp_cmd_intfs_stop(struct mdss_mdp_ctl *ctl, int session,
}
ctx->ref_cnt--;
/* intf stopped, no more kickoff */
ctx->intf_stopped = 1;
spin_lock_irqsave(&ctx->clk_lock, flags);
if (ctx->rdptr_enabled) {
reinit_completion(&ctx->stop_comp);
need_wait = 1;
/*
* clk off at next vsync after pp_done OR
* next vsync if there has no kickoff pending
*/
ctx->rdptr_enabled = 1;
if (sctx)
sctx->rdptr_enabled = 1;
}
spin_unlock_irqrestore(&ctx->clk_lock, flags);
@ -1073,6 +1094,8 @@ static int mdss_mdp_cmd_intfs_setup(struct mdss_mdp_ctl *ctl,
ctx->intf_recovery.fxn = mdss_mdp_cmd_intf_recovery;
ctx->intf_recovery.data = ctx;
ctx->intf_stopped = 0;
pr_debug("%s: ctx=%p num=%d mixer=%d\n", __func__,
ctx, ctx->pp_num, mixer->num);
MDSS_XLOG(ctl->num, atomic_read(&ctx->koff_cnt), ctx->clk_enabled,