diff options
| -rw-r--r-- | drivers/gpu/drm/i915/i915_dma.c | 6 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.h | 12 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_drv.h | 4 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_pm.c | 81 | ||||
| -rw-r--r-- | include/drm/i915_powerwell.h | 36 |
5 files changed, 132 insertions, 7 deletions
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c index 22534c3b4fe..fd8898c8f8e 100644 --- a/drivers/gpu/drm/i915/i915_dma.c +++ b/drivers/gpu/drm/i915/i915_dma.c @@ -1656,6 +1656,9 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags) /* Start out suspended */ dev_priv->mm.suspended = 1; + if (HAS_POWER_WELL(dev)) + i915_init_power_well(dev); + if (drm_core_check_feature(dev, DRIVER_MODESET)) { ret = i915_load_modeset_init(dev); if (ret < 0) { @@ -1712,6 +1715,9 @@ int i915_driver_unload(struct drm_device *dev) intel_gpu_ips_teardown(); + if (HAS_POWER_WELL(dev)) + i915_remove_power_well(dev); + i915_teardown_sysfs(dev); if (dev_priv->mm.inactive_shrinker.shrink) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 215aa63e3f4..87f7f88b103 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -740,6 +740,15 @@ struct intel_ilk_power_mgmt { struct drm_i915_gem_object *renderctx; }; +/* Power well structure for haswell */ +struct i915_power_well { + struct drm_device *device; + spinlock_t lock; + /* power well enable/disable usage count */ + int count; + int i915_request; +}; + struct i915_dri1_state { unsigned allow_batchbuffer : 1; u32 __iomem *gfx_hws_cpu_addr; @@ -1099,6 +1108,9 @@ typedef struct drm_i915_private { * mchdev_lock in intel_pm.c */ struct intel_ilk_power_mgmt ips; + /* Haswell power well */ + struct i915_power_well power_well; + enum no_fbc_reason no_fbc_reason; struct drm_mm_node *compressed_fb; diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index 6bbebf82407..1735cdc8677 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -768,6 +768,10 @@ extern void intel_update_fbc(struct drm_device *dev); extern void intel_gpu_ips_init(struct drm_i915_private *dev_priv); extern void intel_gpu_ips_teardown(void); +/* Power well */ +extern int i915_init_power_well(struct drm_device *dev); +extern void i915_remove_power_well(struct drm_device *dev); + extern bool intel_display_power_enabled(struct drm_device *dev, enum intel_display_power_domain domain); extern void intel_init_power_well(struct drm_device *dev); diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 1e1b48ec6c4..a417d7b196c 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -5024,18 +5024,12 @@ bool intel_display_power_enabled(struct drm_device *dev, } } -void intel_set_power_well(struct drm_device *dev, bool enable) +static void __intel_set_power_well(struct drm_device *dev, bool enable) { struct drm_i915_private *dev_priv = dev->dev_private; bool is_enabled, enable_requested; uint32_t tmp; - 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; @@ -5058,6 +5052,79 @@ void intel_set_power_well(struct drm_device *dev, bool enable) } } +static struct i915_power_well *hsw_pwr; + +/* Display audio driver power well request */ +void i915_request_power_well(void) +{ + if (WARN_ON(!hsw_pwr)) + return; + + spin_lock_irq(&hsw_pwr->lock); + if (!hsw_pwr->count++ && + !hsw_pwr->i915_request) + __intel_set_power_well(hsw_pwr->device, true); + spin_unlock_irq(&hsw_pwr->lock); +} +EXPORT_SYMBOL_GPL(i915_request_power_well); + +/* Display audio driver power well release */ +void i915_release_power_well(void) +{ + if (WARN_ON(!hsw_pwr)) + return; + + spin_lock_irq(&hsw_pwr->lock); + WARN_ON(!hsw_pwr->count); + if (!--hsw_pwr->count && + !hsw_pwr->i915_request) + __intel_set_power_well(hsw_pwr->device, false); + spin_unlock_irq(&hsw_pwr->lock); +} +EXPORT_SYMBOL_GPL(i915_release_power_well); + +int i915_init_power_well(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + + hsw_pwr = &dev_priv->power_well; + + hsw_pwr->device = dev; + spin_lock_init(&hsw_pwr->lock); + hsw_pwr->count = 0; + + return 0; +} + +void i915_remove_power_well(struct drm_device *dev) +{ + hsw_pwr = NULL; +} + +void intel_set_power_well(struct drm_device *dev, bool enable) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + struct i915_power_well *power_well = &dev_priv->power_well; + + if (!HAS_POWER_WELL(dev)) + return; + + if (!i915_disable_power_well && !enable) + return; + + spin_lock_irq(&power_well->lock); + power_well->i915_request = enable; + + /* only reject "disable" power well request */ + if (power_well->count && !enable) { + spin_unlock_irq(&power_well->lock); + return; + } + + __intel_set_power_well(dev, enable); + spin_unlock_irq(&power_well->lock); +} + /* * Starting with Haswell, we have a "Power Down Well" that can be turned off * when not needed anymore. We have 4 registers that can request the power well diff --git a/include/drm/i915_powerwell.h b/include/drm/i915_powerwell.h new file mode 100644 index 00000000000..cfdc884405b --- /dev/null +++ b/include/drm/i915_powerwell.h @@ -0,0 +1,36 @@ +/************************************************************************** + * + * Copyright 2013 Intel Inc. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, + * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR + * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE + * USE OR OTHER DEALINGS IN THE SOFTWARE. + * + * + **************************************************************************/ + +#ifndef _I915_POWERWELL_H_ +#define _I915_POWERWELL_H_ + +/* For use by hda_i915 driver */ +extern void i915_request_power_well(void); +extern void i915_release_power_well(void); + +#endif /* _I915_POWERWELL_H_ */ |