Similarly to the GEN9 power well toggling, saving an occasional extra
MMIO write is not worth the code complexity, let's simplify things.
Signed-off-by: Imre Deak <imre.d...@intel.com>
---
drivers/gpu/drm/i915/intel_runtime_pm.c | 36 ++++++++++++---------------------
1 file changed, 13 insertions(+), 23 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c
b/drivers/gpu/drm/i915/intel_runtime_pm.c
index 28d2ea9..00e97ee 100644
--- a/drivers/gpu/drm/i915/intel_runtime_pm.c
+++ b/drivers/gpu/drm/i915/intel_runtime_pm.c
@@ -399,36 +399,26 @@ static void gen9_wait_for_power_well_disable(struct
drm_i915_private *dev_priv,
static void hsw_set_power_well(struct drm_i915_private *dev_priv,
struct i915_power_well *power_well, bool enable)
{
- bool is_enabled, enable_requested;
uint32_t tmp;
tmp = I915_READ(HSW_PWR_WELL_DRIVER);
- is_enabled = tmp & HSW_PWR_WELL_STATE_ENABLED;
- enable_requested = tmp & HSW_PWR_WELL_ENABLE_REQUEST;
if (enable) {
- if (!enable_requested)
- I915_WRITE(HSW_PWR_WELL_DRIVER,
- HSW_PWR_WELL_ENABLE_REQUEST);
-
- if (!is_enabled) {
- DRM_DEBUG_KMS("Enabling power well\n");
- if (intel_wait_for_register(dev_priv,
- HSW_PWR_WELL_DRIVER,
- HSW_PWR_WELL_STATE_ENABLED,
- HSW_PWR_WELL_STATE_ENABLED,
- 20))
- DRM_ERROR("Timeout enabling power well\n");
- hsw_power_well_post_enable(dev_priv);
- }
+ I915_WRITE(HSW_PWR_WELL_DRIVER, HSW_PWR_WELL_ENABLE_REQUEST);
+ DRM_DEBUG_KMS("Enabling power well\n");
+ if (intel_wait_for_register(dev_priv,
+ HSW_PWR_WELL_DRIVER,
+ HSW_PWR_WELL_STATE_ENABLED,
+ HSW_PWR_WELL_STATE_ENABLED,
+ 20))
+ DRM_ERROR("Timeout enabling power well\n");
+ hsw_power_well_post_enable(dev_priv);
} else {
- if (enable_requested) {
- hsw_power_well_pre_disable(dev_priv);
- I915_WRITE(HSW_PWR_WELL_DRIVER, 0);
- POSTING_READ(HSW_PWR_WELL_DRIVER);
- DRM_DEBUG_KMS("Requesting to disable the power well\n");
- }
+ hsw_power_well_pre_disable(dev_priv);
+ I915_WRITE(HSW_PWR_WELL_DRIVER, 0);
+ POSTING_READ(HSW_PWR_WELL_DRIVER);
+ DRM_DEBUG_KMS("Requesting to disable the power well\n");
}
}
--
2.7.4
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