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drm/rockchip: Fix up bug in psr state machine 

The ->set() callback would always be called when transitioning
from FLUSH->DISABLE since we assign state to psr->state right
above the skip condition.

Reported-by: Daniel Kurtz <djkurtz@chromium.org>
Reviewed-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
This commit is contained in:
Sean Paul 2016-09-06 14:11:53 -04:00
parent d2f12adc00
commit be91a983ea
1 changed files with 5 additions and 3 deletions
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8
drivers/gpu/drm/rockchip/rockchip_drm_psr.c
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@ -71,11 +71,13 @@ static void psr_set_state_locked(struct psr_drv *psr, enum psr_state state)
if (state == psr->state || !psr->active)
return;
psr->state = state;
/* Already disabled in flush, change the state, but not the hardware */
if (state == PSR_DISABLE && psr->state == PSR_FLUSH)
if (state == PSR_DISABLE && psr->state == PSR_FLUSH) {
psr->state = state;
return;
}
psr->state = state;
/* Actually commit the state change to hardware */
switch (psr->state) {