diff options
| author |   Sean Paul <seanpaul@chromium.org> | 2016-08-16 15:58:29 -0700 |
|---|---|---|
| committer | Sean Paul <seanpaul@chromium.org> | 2016-08-23 11:44:34 -0400 |
| commit | 23c0f3dcc05a15eb1010e10ea8f86d1849560e70 (patch) | |
| tree | 6d7f2f14dd144db8c7fe419279ca488a9ecbb80e /drivers/gpu/drm/rockchip | |
| parent | drm/rockchip: Convert psr_list_mutex to spinlock and use it (diff) | |
| download | linux-dev-23c0f3dcc05a15eb1010e10ea8f86d1849560e70.tar.xz linux-dev-23c0f3dcc05a15eb1010e10ea8f86d1849560e70.zip | |
drm/rockchip: Don't use a delayed worker for psr state changes
The delayed worker isn't needed and is racey. Remove it and do
the state change in line.
Reviewed-by: Yakir Yang <ykk@rock-chips.com>
Tested-by: Yakir Yang <ykk@rock-chips.com>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Diffstat (limited to 'drivers/gpu/drm/rockchip')
| -rw-r--r-- | drivers/gpu/drm/rockchip/rockchip_drm_psr.c | 38 |
1 files changed, 10 insertions, 28 deletions
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_psr.c b/drivers/gpu/drm/rockchip/rockchip_drm_psr.c index bd25273a89bb..4c645d757da5 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_psr.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_psr.c @@ -19,7 +19,6 @@ #include "rockchip_drm_psr.h" #define PSR_FLUSH_TIMEOUT msecs_to_jiffies(3000) /* 3 seconds */ -#define PSR_SET_DELAY_TIME msecs_to_jiffies(10) enum psr_state { PSR_FLUSH, @@ -31,11 +30,8 @@ struct psr_drv { struct list_head list; struct drm_encoder *encoder; - enum psr_state request_state; enum psr_state state; - struct delayed_work state_work; - struct timer_list flush_timer; void (*set)(struct drm_encoder *encoder, bool enable); @@ -59,11 +55,8 @@ out: return psr; } -static void psr_state_work(struct work_struct *work) +static void psr_set_state(struct psr_drv *psr, enum psr_state state) { - struct psr_drv *psr = container_of(work, typeof(*psr), state_work.work); - enum psr_state request_state = psr->request_state; - /* * Allowed finite state machine: * @@ -75,24 +68,22 @@ static void psr_state_work(struct work_struct *work) */ /* Forbid no state change */ - if (request_state == psr->state) + if (state == psr->state) return; /* Forbid DISABLE change to FLUSH */ - if (request_state == PSR_FLUSH && psr->state == PSR_DISABLE) + if (state == PSR_FLUSH && psr->state == PSR_DISABLE) return; + /* Only wrote in this work, no need lock protection */ + psr->state = state; + /* Allow but no need hardware change, just need assign the state */ - if (request_state == PSR_DISABLE && psr->state == PSR_FLUSH) { - psr->state = request_state; + if (state == PSR_DISABLE && psr->state == PSR_FLUSH) return; - } - - /* Only wrote in this work, no need lock protection */ - psr->state = request_state; /* Refact to hardware state change */ - switch (request_state) { + switch (psr->state) { case PSR_ENABLE: psr->set(psr->encoder, true); break; @@ -104,13 +95,6 @@ static void psr_state_work(struct work_struct *work) } } -static void psr_set_state(struct psr_drv *psr, enum psr_state state) -{ - psr->request_state = state; - - schedule_delayed_work(&psr->state_work, PSR_SET_DELAY_TIME); -} - static void psr_flush_handler(unsigned long data) { struct psr_drv *psr = (struct psr_drv *)data; @@ -119,7 +103,7 @@ static void psr_flush_handler(unsigned long data) return; /* State changed between flush time, then keep it */ - if (psr->request_state != PSR_FLUSH) + if (psr->state != PSR_FLUSH) return; psr_set_state(psr, PSR_ENABLE); @@ -183,7 +167,7 @@ void rockchip_drm_psr_flush(struct drm_device *dev) spin_lock_irqsave(&drm_drv->psr_list_lock, flags); list_for_each_entry(psr, &drm_drv->psr_list, list) { - if (psr->request_state == PSR_DISABLE) + if (psr->state == PSR_DISABLE) continue; mod_timer(&psr->flush_timer, @@ -219,8 +203,6 @@ int rockchip_drm_psr_register(struct drm_encoder *encoder, setup_timer(&psr->flush_timer, psr_flush_handler, (unsigned long)psr); - INIT_DELAYED_WORK(&psr->state_work, psr_state_work); - psr->state = PSR_DISABLE; psr->encoder = encoder; psr->set = psr_set; |