From: Paulo Zanoni <paulo.r.zan...@intel.com>
We're still not 100% ready to disable the power well, so don't disable
it for now.
Also, instead of just reverting the code, add a Kernel option to let
us disable it if we want. This will allow us to keep developing and
testing the feature while it's not enabled.
Signed-off-by: Paulo Zanoni <paulo.r.zan...@intel.com>
---
drivers/gpu/drm/i915/i915_drv.c | 5 +++++
drivers/gpu/drm/i915/i915_drv.h | 1 +
drivers/gpu/drm/i915/intel_pm.c | 3 +++
3 files changed, 9 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 6c4b13c..0614aff 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -123,6 +123,11 @@ module_param_named(preliminary_hw_support,
i915_preliminary_hw_support, int, 060
MODULE_PARM_DESC(preliminary_hw_support,
"Enable preliminary hardware support. (default: false)");
+int i915_disable_power_well __read_mostly = 0;
+module_param_named(disable_power_well, i915_disable_power_well, int, 0600);
+MODULE_PARM_DESC(disable_power_well,
+ "Disable the power well when possible (default: false)");
+
static struct drm_driver driver;
extern int intel_agp_enabled;
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 1657d873..625cccf 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1398,6 +1398,7 @@ extern int i915_enable_fbc __read_mostly;
extern bool i915_enable_hangcheck __read_mostly;
extern int i915_enable_ppgtt __read_mostly;
extern unsigned int i915_preliminary_hw_support __read_mostly;
+extern int i915_disable_power_well __read_mostly;
extern int i915_suspend(struct drm_device *dev, pm_message_t state);
extern int i915_resume(struct drm_device *dev);
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index ce3db2c..2de6da6 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -4095,6 +4095,9 @@ void intel_set_power_well(struct drm_device *dev, bool
enable)
if (!HAS_POWER_WELL(dev))
return;
+ if (!i915_disable_power_well && !enable)
+ return;
+
tmp = I915_READ(HSW_PWR_WELL_DRIVER);
is_enabled = tmp & HSW_PWR_WELL_STATE;
enable_requested = tmp & HSW_PWR_WELL_ENABLE;
--
1.7.10.4
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