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drm/exynos: set power state variable after enabling clocks and power 

Power state variable holds the state of the mixer device.
Power on and power off functions are toggling these variable
at wrong place.

State variable should be changed to true only after Runtime
PM and clocks are enabled. Else it may result to a situation
where mixer registers are accessed with device power enabled.
Similar logic for poweroff sequence.

Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
This commit is contained in:
Rahul Sharma 2014-06-23 11:02:21 +05:30 committed by Inki Dae
parent d9b68d89c2
commit b4bfa3c7d0
1 changed files with 13 additions and 9 deletions
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22
drivers/gpu/drm/exynos/exynos_mixer.c
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@ -1061,7 +1061,7 @@ static void mixer_poweron(struct exynos_drm_manager *mgr)
mutex_unlock(&ctx->mixer_mutex);
return;
}
ctx->powered = true;
mutex_unlock(&ctx->mixer_mutex);
pm_runtime_get_sync(ctx->dev);
@ -1072,6 +1072,10 @@ static void mixer_poweron(struct exynos_drm_manager *mgr)
clk_prepare_enable(res->sclk_mixer);
}
mutex_lock(&ctx->mixer_mutex);
ctx->powered = true;
mutex_unlock(&ctx->mixer_mutex);
mixer_reg_write(res, MXR_INT_EN, ctx->int_en);
mixer_win_reset(ctx);
@ -1084,14 +1088,20 @@ static void mixer_poweroff(struct exynos_drm_manager *mgr)
struct mixer_resources *res = &ctx->mixer_res;
mutex_lock(&ctx->mixer_mutex);
if (!ctx->powered)
goto out;
if (!ctx->powered) {
mutex_unlock(&ctx->mixer_mutex);
return;
}
mutex_unlock(&ctx->mixer_mutex);
mixer_window_suspend(mgr);
ctx->int_en = mixer_reg_read(res, MXR_INT_EN);
mutex_lock(&ctx->mixer_mutex);
ctx->powered = false;
mutex_unlock(&ctx->mixer_mutex);
clk_disable_unprepare(res->mixer);
if (ctx->vp_enabled) {
clk_disable_unprepare(res->vp);
@ -1099,12 +1109,6 @@ static void mixer_poweroff(struct exynos_drm_manager *mgr)
}
pm_runtime_put_sync(ctx->dev);
mutex_lock(&ctx->mixer_mutex);
ctx->powered = false;
out:
mutex_unlock(&ctx->mixer_mutex);
}
static void mixer_dpms(struct exynos_drm_manager *mgr, int mode)