diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_uncore.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_uncore.c | 23 |
1 files changed, 16 insertions, 7 deletions
diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c index 4075010..164dbb8 100644 --- a/drivers/gpu/drm/i915/intel_uncore.c +++ b/drivers/gpu/drm/i915/intel_uncore.c @@ -1767,12 +1767,14 @@ int __intel_wait_for_register_fw(struct drm_i915_private *dev_priv, } /** - * intel_wait_for_register - wait until register matches expected state + * __intel_wait_for_register - wait until register matches expected state * @dev_priv: the i915 device * @reg: the register to read * @mask: mask to apply to register value * @value: expected value - * @timeout_ms: timeout in millisecond + * @fast_timeout_us: fast timeout in microsecond for atomic/tight wait + * @slow_timeout_ms: slow timeout in millisecond + * @out_value: optional placeholder to hold registry value * * This routine waits until the target register @reg contains the expected * @value after applying the @mask, i.e. it waits until :: @@ -1783,14 +1785,17 @@ int __intel_wait_for_register_fw(struct drm_i915_private *dev_priv, * * Returns 0 if the register matches the desired condition, or -ETIMEOUT. */ -int intel_wait_for_register(struct drm_i915_private *dev_priv, +int __intel_wait_for_register(struct drm_i915_private *dev_priv, i915_reg_t reg, u32 mask, u32 value, - unsigned int timeout_ms) + unsigned int fast_timeout_us, + unsigned int slow_timeout_ms, + u32 *out_value) { unsigned fw = intel_uncore_forcewake_for_reg(dev_priv, reg, FW_REG_READ); + u32 reg_value; int ret; might_sleep(); @@ -1800,14 +1805,18 @@ int intel_wait_for_register(struct drm_i915_private *dev_priv, ret = __intel_wait_for_register_fw(dev_priv, reg, mask, value, - 2, 0, NULL); + fast_timeout_us, 0, ®_value); intel_uncore_forcewake_put__locked(dev_priv, fw); spin_unlock_irq(&dev_priv->uncore.lock); if (ret) - ret = wait_for((I915_READ_NOTRACE(reg) & mask) == value, - timeout_ms); + ret = __wait_for(reg_value = I915_READ_NOTRACE(reg), + (reg_value & mask) == value, + slow_timeout_ms * 1000, 10, 1000); + + if (out_value) + *out_value = reg_value; return ret; } |
