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Commit 78e2933d authored by Ben Skeggs's avatar Ben Skeggs
Browse files

drm/nouveau: add function to wait until a callback returns true 



Signed-off-by: default avatarBen Skeggs <bskeggs@redhat.com>
parent 95f0de3a

drivers/gpu/drm/nouveau/nouveau_drv.h

+4 −0
Original line number Diff line number Diff line
@@ -833,6 +833,8 @@ extern bool nouveau_wait_eq(struct drm_device *, uint64_t timeout, 
			    uint32_t reg, uint32_t mask, uint32_t val);

extern bool nouveau_wait_ne(struct drm_device *, uint64_t timeout,

			    uint32_t reg, uint32_t mask, uint32_t val);

extern bool nouveau_wait_cb(struct drm_device *, u64 timeout,

			    bool (*cond)(void *), void *);

extern bool nouveau_wait_for_idle(struct drm_device *);

extern int  nouveau_card_init(struct drm_device *);
@@ -1457,6 +1459,8 @@ static inline void nv_wr08(struct drm_device *dev, unsigned reg, u8 val) 
	nouveau_wait_eq(dev, 2000000000ULL, (reg), (mask), (val))

#define nv_wait_ne(dev, reg, mask, val) \

	nouveau_wait_ne(dev, 2000000000ULL, (reg), (mask), (val))

#define nv_wait_cb(dev, func, data) \

	nouveau_wait_cb(dev, 2000000000ULL, (func), (data))



/* PRAMIN access */

static inline u32 nv_ri32(struct drm_device *dev, unsigned offset)

drivers/gpu/drm/nouveau/nouveau_state.c

+17 −0
Original line number Diff line number Diff line
@@ -1200,6 +1200,23 @@ nouveau_wait_ne(struct drm_device *dev, uint64_t timeout, 
	return false;

}



/* Wait until cond(data) == true, up until timeout has hit */

bool

nouveau_wait_cb(struct drm_device *dev, u64 timeout,

		bool (*cond)(void *), void *data)

{

	struct drm_nouveau_private *dev_priv = dev->dev_private;

	struct nouveau_timer_engine *ptimer = &dev_priv->engine.timer;

	u64 start = ptimer->read(dev);



	do {

		if (cond(data) == true)

			return true;

	} while (ptimer->read(dev) - start < timeout);



	return false;

}



/* Waits for PGRAPH to go completely idle */

bool nouveau_wait_for_idle(struct drm_device *dev)

{