diff options
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_dma.c | 10 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.c | 11 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.h | 72 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem.c | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_irq.c | 101 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 170 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_dp.c | 3 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_drv.h | 8 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_i2c.c | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_pm.c | 13 |
10 files changed, 390 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c index 5a051eaab9ef..09e8ef910ec5 100644 --- a/drivers/gpu/drm/i915/i915_dma.c +++ b/drivers/gpu/drm/i915/i915_dma.c @@ -1486,6 +1486,14 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags) mutex_init(&dev_priv->rps.hw_lock); mutex_init(&dev_priv->modeset_restore_lock); + mutex_init(&dev_priv->pc8.lock); + dev_priv->pc8.requirements_met = false; + dev_priv->pc8.gpu_idle = false; + dev_priv->pc8.irqs_disabled = false; + dev_priv->pc8.enabled = false; + dev_priv->pc8.disable_count = 2; /* requirements_met + gpu_idle */ + INIT_DELAYED_WORK(&dev_priv->pc8.enable_work, hsw_enable_pc8_work); + i915_dump_device_info(dev_priv); /* Not all pre-production machines fall into this category, only the @@ -1740,6 +1748,8 @@ int i915_driver_unload(struct drm_device *dev) cancel_work_sync(&dev_priv->gpu_error.work); i915_destroy_error_state(dev); + cancel_delayed_work_sync(&dev_priv->pc8.enable_work); + if (dev->pdev->msi_enabled) pci_disable_msi(dev->pdev); diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index fd9fb2c25691..84d48b82e3f1 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -141,6 +141,10 @@ module_param_named(fastboot, i915_fastboot, bool, 0600); MODULE_PARM_DESC(fastboot, "Try to skip unnecessary mode sets at boot time " "(default: false)"); +int i915_enable_pc8 __read_mostly = 0; +module_param_named(enable_pc8, i915_enable_pc8, int, 0600); +MODULE_PARM_DESC(enable_pc8, "Enable support for low power package C states (PC8+) (default: false)"); + bool i915_prefault_disable __read_mostly; module_param_named(prefault_disable, i915_prefault_disable, bool, 0600); MODULE_PARM_DESC(prefault_disable, @@ -557,6 +561,9 @@ static int i915_drm_freeze(struct drm_device *dev) dev_priv->modeset_restore = MODESET_SUSPENDED; mutex_unlock(&dev_priv->modeset_restore_lock); + /* We do a lot of poking in a lot of registers, make sure they work + * properly. */ + hsw_disable_package_c8(dev_priv); intel_set_power_well(dev, true); drm_kms_helper_poll_disable(dev); @@ -713,6 +720,10 @@ static int __i915_drm_thaw(struct drm_device *dev) schedule_work(&dev_priv->console_resume_work); } + /* Undo what we did at i915_drm_freeze so the refcount goes back to the + * expected level. */ + hsw_enable_package_c8(dev_priv); + mutex_lock(&dev_priv->modeset_restore_lock); dev_priv->modeset_restore = MODESET_DONE; mutex_unlock(&dev_priv->modeset_restore_lock); diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index f423a94c1b25..627c8216db1f 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -1076,6 +1076,75 @@ struct intel_wm_level { uint32_t fbc_val; }; +/* + * This struct tracks the state needed for the Package C8+ feature. + * + * Package states C8 and deeper are really deep PC states that can only be + * reached when all the devices on the system allow it, so even if the graphics + * device allows PC8+, it doesn't mean the system will actually get to these + * states. + * + * Our driver only allows PC8+ when all the outputs are disabled, the power well + * is disabled and the GPU is idle. When these conditions are met, we manually + * do the other conditions: disable the interrupts, clocks and switch LCPLL + * refclk to Fclk. + * + * When we really reach PC8 or deeper states (not just when we allow it) we lose + * the state of some registers, so when we come back from PC8+ we need to + * restore this state. We don't get into PC8+ if we're not in RC6, so we don't + * need to take care of the registers kept by RC6. + * + * The interrupt disabling is part of the requirements. We can only leave the + * PCH HPD interrupts enabled. If we're in PC8+ and we get another interrupt we + * can lock the machine. + * + * Ideally every piece of our code that needs PC8+ disabled would call + * hsw_disable_package_c8, which would increment disable_count and prevent the + * system from reaching PC8+. But we don't have a symmetric way to do this for + * everything, so we have the requirements_met and gpu_idle variables. When we + * switch requirements_met or gpu_idle to true we decrease disable_count, and + * increase it in the opposite case. The requirements_met variable is true when + * all the CRTCs, encoders and the power well are disabled. The gpu_idle + * variable is true when the GPU is idle. + * + * In addition to everything, we only actually enable PC8+ if disable_count + * stays at zero for at least some seconds. This is implemented with the + * enable_work variable. We do this so we don't enable/disable PC8 dozens of + * consecutive times when all screens are disabled and some background app + * queries the state of our connectors, or we have some application constantly + * waking up to use the GPU. Only after the enable_work function actually + * enables PC8+ the "enable" variable will become true, which means that it can + * be false even if disable_count is 0. + * + * The irqs_disabled variable becomes true exactly after we disable the IRQs and + * goes back to false exactly before we reenable the IRQs. We use this variable + * to check if someone is trying to enable/disable IRQs while they're supposed + * to be disabled. This shouldn't happen and we'll print some error messages in + * case it happens, but if it actually happens we'll also update the variables + * inside struct regsave so when we restore the IRQs they will contain the + * latest expected values. + * + * For more, read "Display Sequences for Package C8" on our documentation. + */ +struct i915_package_c8 { + bool requirements_met; + bool gpu_idle; + bool irqs_disabled; + /* Only true after the delayed work task actually enables it. */ + bool enabled; + int disable_count; + struct mutex lock; + struct delayed_work enable_work; + + struct { + uint32_t deimr; + uint32_t sdeimr; + uint32_t gtimr; + uint32_t gtier; + uint32_t gen6_pmimr; + } regsave; +}; + typedef struct drm_i915_private { struct drm_device *dev; struct kmem_cache *slab; @@ -1260,6 +1329,8 @@ typedef struct drm_i915_private { uint16_t cur_latency[5]; } wm; + struct i915_package_c8 pc8; + /* Old dri1 support infrastructure, beware the dragons ya fools entering * here! */ struct i915_dri1_state dri1; @@ -1635,6 +1706,7 @@ extern unsigned int i915_preliminary_hw_support __read_mostly; extern int i915_disable_power_well __read_mostly; extern int i915_enable_ips __read_mostly; extern bool i915_fastboot __read_mostly; +extern int i915_enable_pc8 __read_mostly; extern bool i915_prefault_disable __read_mostly; extern int i915_suspend(struct drm_device *dev, pm_message_t state); diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 449575b85b31..23c42567631e 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -1005,6 +1005,8 @@ static int __wait_seqno(struct intel_ring_buffer *ring, u32 seqno, bool wait_forever = true; int ret; + WARN(dev_priv->pc8.irqs_disabled, "IRQs disabled\n"); + if (i915_seqno_passed(ring->get_seqno(ring, true), seqno)) return 0; diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index caf83da17bb0..a03b445ceb5f 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -85,6 +85,12 @@ ironlake_enable_display_irq(drm_i915_private_t *dev_priv, u32 mask) { assert_spin_locked(&dev_priv->irq_lock); + if (dev_priv->pc8.irqs_disabled) { + WARN(1, "IRQs disabled\n"); + dev_priv->pc8.regsave.deimr &= ~mask; + return; + } + if ((dev_priv->irq_mask & mask) != 0) { dev_priv->irq_mask &= ~mask; I915_WRITE(DEIMR, dev_priv->irq_mask); @@ -97,6 +103,12 @@ ironlake_disable_display_irq(drm_i915_private_t *dev_priv, u32 mask) { assert_spin_locked(&dev_priv->irq_lock); + if (dev_priv->pc8.irqs_disabled) { + WARN(1, "IRQs disabled\n"); + dev_priv->pc8.regsave.deimr |= mask; + return; + } + if ((dev_priv->irq_mask & mask) != mask) { dev_priv->irq_mask |= mask; I915_WRITE(DEIMR, dev_priv->irq_mask); @@ -116,6 +128,14 @@ static void ilk_update_gt_irq(struct drm_i915_private *dev_priv, { assert_spin_locked(&dev_priv->irq_lock); + if (dev_priv->pc8.irqs_disabled) { + WARN(1, "IRQs disabled\n"); + dev_priv->pc8.regsave.gtimr &= ~interrupt_mask; + dev_priv->pc8.regsave.gtimr |= (~enabled_irq_mask & + interrupt_mask); + return; + } + dev_priv->gt_irq_mask &= ~interrupt_mask; dev_priv->gt_irq_mask |= (~enabled_irq_mask & interrupt_mask); I915_WRITE(GTIMR, dev_priv->gt_irq_mask); @@ -146,6 +166,14 @@ static void snb_update_pm_irq(struct drm_i915_private *dev_priv, assert_spin_locked(&dev_priv->irq_lock); + if (dev_priv->pc8.irqs_disabled) { + WARN(1, "IRQs disabled\n"); + dev_priv->pc8.regsave.gen6_pmimr &= ~interrupt_mask; + dev_priv->pc8.regsave.gen6_pmimr |= (~enabled_irq_mask & + interrupt_mask); + return; + } + new_val = dev_priv->pm_irq_mask; new_val &= ~interrupt_mask; new_val |= (~enabled_irq_mask & interrupt_mask); @@ -257,6 +285,15 @@ static void ibx_display_interrupt_update(struct drm_i915_private *dev_priv, assert_spin_locked(&dev_priv->irq_lock); + if (dev_priv->pc8.irqs_disabled && + (interrupt_mask & SDE_HOTPLUG_MASK_CPT)) { + WARN(1, "IRQs disabled\n"); + dev_priv->pc8.regsave.sdeimr &= ~interrupt_mask; + dev_priv->pc8.regsave.sdeimr |= (~enabled_irq_mask & + interrupt_mask); + return; + } + I915_WRITE(SDEIMR, sdeimr); POSTING_READ(SDEIMR); } @@ -3113,3 +3150,67 @@ void intel_hpd_init(struct drm_device *dev) dev_priv->display.hpd_irq_setup(dev); spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); } + +/* Disable interrupts so we can allow Package C8+. */ +void hsw_pc8_disable_interrupts(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + unsigned long irqflags; + + spin_lock_irqsave(&dev_priv->irq_lock, irqflags); + + dev_priv->pc8.regsave.deimr = I915_READ(DEIMR); + dev_priv->pc8.regsave.sdeimr = I915_READ(SDEIMR); + dev_priv->pc8.regsave.gtimr = I915_READ(GTIMR); + dev_priv->pc8.regsave.gtier = I915_READ(GTIER); + dev_priv->pc8.regsave.gen6_pmimr = I915_READ(GEN6_PMIMR); + + ironlake_disable_display_irq(dev_priv, ~DE_PCH_EVENT_IVB); + ibx_disable_display_interrupt(dev_priv, ~SDE_HOTPLUG_MASK_CPT); + ilk_disable_gt_irq(dev_priv, 0xffffffff); + snb_disable_pm_irq(dev_priv, 0xffffffff); + + dev_priv->pc8.irqs_disabled = true; + + spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); +} + +/* Restore interrupts so we can recover from Package C8+. */ +void hsw_pc8_restore_interrupts(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + unsigned long irqflags; + uint32_t val, expected; + + spin_lock_irqsave(&dev_priv->irq_lock, irqflags); + + val = I915_READ(DEIMR); + expected = ~DE_PCH_EVENT_IVB; + WARN(val != expected, "DEIMR is 0x%08x, not 0x%08x\n", val, expected); + + val = I915_READ(SDEIMR) & ~SDE_HOTPLUG_MASK_CPT; + expected = ~SDE_HOTPLUG_MASK_CPT; + WARN(val != expected, "SDEIMR non-HPD bits are 0x%08x, not 0x%08x\n", + val, expected); + + val = I915_READ(GTIMR); + expected = 0xffffffff; + WARN(val != expected, "GTIMR is 0x%08x, not 0x%08x\n", val, expected); + + val = I915_READ(GEN6_PMIMR); + expected = 0xffffffff; + WARN(val != expected, "GEN6_PMIMR is 0x%08x, not 0x%08x\n", val, + expected); + + dev_priv->pc8.irqs_disabled = false; + + ironlake_enable_display_irq(dev_priv, ~dev_priv->pc8.regsave.deimr); + ibx_enable_display_interrupt(dev_priv, + ~dev_priv->pc8.regsave.sdeimr & + ~SDE_HOTPLUG_MASK_CPT); + ilk_enable_gt_irq(dev_priv, ~dev_priv->pc8.regsave.gtimr); + snb_enable_pm_irq(dev_priv, ~dev_priv->pc8.regsave.gen6_pmimr); + I915_WRITE(GTIER, dev_priv->pc8.regsave.gtier); + + spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); +} diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index fc92773ef552..1fad9de3d810 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -6064,6 +6064,166 @@ void hsw_restore_lcpll(struct drm_i915_private *dev_priv) dev_priv->uncore.funcs.force_wake_put(dev_priv); } +void hsw_enable_pc8_work(struct work_struct *__work) +{ + struct drm_i915_private *dev_priv = + container_of(to_delayed_work(__work), struct drm_i915_private, + pc8.enable_work); + struct drm_device *dev = dev_priv->dev; + uint32_t val; + + if (dev_priv->pc8.enabled) + return; + + DRM_DEBUG_KMS("Enabling package C8+\n"); + + dev_priv->pc8.enabled = true; + + if (dev_priv->pch_id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE) { + val = I915_READ(SOUTH_DSPCLK_GATE_D); + val &= ~PCH_LP_PARTITION_LEVEL_DISABLE; + I915_WRITE(SOUTH_DSPCLK_GATE_D, val); + } + + lpt_disable_clkout_dp(dev); + hsw_pc8_disable_interrupts(dev); + hsw_disable_lcpll(dev_priv, true, true); +} + +static void __hsw_enable_package_c8(struct drm_i915_private *dev_priv) +{ + WARN_ON(!mutex_is_locked(&dev_priv->pc8.lock)); + WARN(dev_priv->pc8.disable_count < 1, + "pc8.disable_count: %d\n", dev_priv->pc8.disable_count); + + dev_priv->pc8.disable_count--; + if (dev_priv->pc8.disable_count != 0) + return; + + schedule_delayed_work(&dev_priv->pc8.enable_work, + msecs_to_jiffies(5 * 1000)); +} + +static void __hsw_disable_package_c8(struct drm_i915_private *dev_priv) +{ + struct drm_device *dev = dev_priv->dev; + uint32_t val; + + WARN_ON(!mutex_is_locked(&dev_priv->pc8.lock)); + WARN(dev_priv->pc8.disable_count < 0, + "pc8.disable_count: %d\n", dev_priv->pc8.disable_count); + + dev_priv->pc8.disable_count++; + if (dev_priv->pc8.disable_count != 1) + return; + + cancel_delayed_work_sync(&dev_priv->pc8.enable_work); + if (!dev_priv->pc8.enabled) + return; + + DRM_DEBUG_KMS("Disabling package C8+\n"); + + hsw_restore_lcpll(dev_priv); + hsw_pc8_restore_interrupts(dev); + lpt_init_pch_refclk(dev); + + if (dev_priv->pch_id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE) { + val = I915_READ(SOUTH_DSPCLK_GATE_D); + val |= PCH_LP_PARTITION_LEVEL_DISABLE; + I915_WRITE(SOUTH_DSPCLK_GATE_D, val); + } + + intel_prepare_ddi(dev); + i915_gem_init_swizzling(dev); + mutex_lock(&dev_priv->rps.hw_lock); + gen6_update_ring_freq(dev); + mutex_unlock(&dev_priv->rps.hw_lock); + dev_priv->pc8.enabled = false; +} + +void hsw_enable_package_c8(struct drm_i915_private *dev_priv) +{ + mutex_lock(&dev_priv->pc8.lock); + __hsw_enable_package_c8(dev_priv); + mutex_unlock(&dev_priv->pc8.lock); +} + +void hsw_disable_package_c8(struct drm_i915_private *dev_priv) +{ + mutex_lock(&dev_priv->pc8.lock); + __hsw_disable_package_c8(dev_priv); + mutex_unlock(&dev_priv->pc8.lock); +} + +static bool hsw_can_enable_package_c8(struct drm_i915_private *dev_priv) +{ + struct drm_device *dev = dev_priv->dev; + struct intel_crtc *crtc; + uint32_t val; + + list_for_each_entry(crtc, &dev->mode_config.crtc_list, base.head) + if (crtc->base.enabled) + return false; + + /* This case is still possible since we have the i915.disable_power_well + * parameter and also the KVMr or something else might be requesting the + * power well. */ + val = I915_READ(HSW_PWR_WELL_DRIVER); + if (val != 0) { + DRM_DEBUG_KMS("Not enabling PC8: power well on\n"); + return false; + } + + return true; +} + +/* Since we're called from modeset_global_resources there's no way to + * symmetrically increase and decrease the refcount, so we use + * dev_priv->pc8.requirements_met to track whether we already have the refcount + * or not. + */ +static void hsw_update_package_c8(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + bool allow; + + if (!i915_enable_pc8) + return; + + mutex_lock(&dev_priv->pc8.lock); + + allow = hsw_can_enable_package_c8(dev_priv); + + if (allow == dev_priv->pc8.requirements_met) + goto done; + + dev_priv->pc8.requirements_met = allow; + + if (allow) + __hsw_enable_package_c8(dev_priv); + else + __hsw_disable_package_c8(dev_priv); + +done: + mutex_unlock(&dev_priv->pc8.lock); +} + +static void hsw_package_c8_gpu_idle(struct drm_i915_private *dev_priv) +{ + if (!dev_priv->pc8.gpu_idle) { + dev_priv->pc8.gpu_idle = true; + hsw_enable_package_c8(dev_priv); + } +} + +static void hsw_package_c8_gpu_busy(struct drm_i915_private *dev_priv) +{ + if (dev_priv->pc8.gpu_idle) { + dev_priv->pc8.gpu_idle = false; + hsw_disable_package_c8(dev_priv); + } +} + static void haswell_modeset_global_resources(struct drm_device *dev) { bool enable = false; @@ -6079,6 +6239,8 @@ static void haswell_modeset_global_resources(struct drm_device *dev) } intel_set_power_well(dev, enable); + + hsw_update_package_c8(dev); } static int haswell_crtc_mode_set(struct drm_crtc *crtc, @@ -7310,13 +7472,19 @@ static void intel_decrease_pllclock(struct drm_crtc *crtc) void intel_mark_busy(struct drm_device *dev) { - i915_update_gfx_val(dev->dev_private); + struct drm_i915_private *dev_priv = dev->dev_private; + + hsw_package_c8_gpu_busy(dev_priv); + i915_update_gfx_val(dev_priv); } void intel_mark_idle(struct drm_device *dev) { + struct drm_i915_private *dev_priv = dev->dev_private; struct drm_crtc *crtc; + hsw_package_c8_gpu_idle(dev_priv); + if (!i915_powersave) return; diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 2726d4d41722..2151d13772b8 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -344,6 +344,8 @@ intel_dp_aux_ch(struct intel_dp *intel_dp, else precharge = 5; + intel_aux_display_runtime_get(dev_priv); + /* Try to wait for any previous AUX channel activity */ for (try = 0; try < 3; try++) { status = I915_READ_NOTRACE(ch_ctl); @@ -434,6 +436,7 @@ intel_dp_aux_ch(struct intel_dp *intel_dp, ret = recv_bytes; out: pm_qos_update_request(&dev_priv->pm_qos, PM_QOS_DEFAULT_VALUE); + intel_aux_display_runtime_put(dev_priv); return ret; } diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index 8222f2426b47..176080822a74 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -745,6 +745,7 @@ extern void intel_set_power_well(struct drm_device *dev, bool enable); extern void intel_enable_gt_powersave(struct drm_device *dev); extern void intel_disable_gt_powersave(struct drm_device *dev); extern void ironlake_teardown_rc6(struct drm_device *dev); +void gen6_update_ring_freq(struct drm_device *dev); extern bool intel_ddi_get_hw_state(struct intel_encoder *encoder, enum pipe *pipe); @@ -784,5 +785,12 @@ extern void ilk_disable_gt_irq(struct drm_i915_private *dev_priv, extern void snb_enable_pm_irq(struct drm_i915_private *dev_priv, uint32_t mask); extern void snb_disable_pm_irq(struct drm_i915_private *dev_priv, uint32_t mask); +extern void hsw_enable_pc8_work(struct work_struct *__work); +extern void hsw_enable_package_c8(struct drm_i915_private *dev_priv); +extern void hsw_disable_package_c8(struct drm_i915_private *dev_priv); +extern void hsw_pc8_disable_interrupts(struct drm_device *dev); +extern void hsw_pc8_restore_interrupts(struct drm_device *dev); +extern void intel_aux_display_runtime_get(struct drm_i915_private *dev_priv); +extern void intel_aux_display_runtime_put(struct drm_i915_private *dev_priv); #endif /* __INTEL_DRV_H__ */ diff --git a/drivers/gpu/drm/i915/intel_i2c.c b/drivers/gpu/drm/i915/intel_i2c.c index 639fe192997c..d1c1e0f7f262 100644 --- a/drivers/gpu/drm/i915/intel_i2c.c +++ b/drivers/gpu/drm/i915/intel_i2c.c @@ -398,6 +398,7 @@ gmbus_xfer(struct i2c_adapter *adapter, int i, reg_offset; int ret = 0; + intel_aux_display_runtime_get(dev_priv); mutex_lock(&dev_priv->gmbus_mutex); if (bus->force_bit) { @@ -497,6 +498,7 @@ timeout: out: mutex_unlock(&dev_priv->gmbus_mutex); + intel_aux_display_runtime_put(dev_priv); return ret; } diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index cbab95dce352..0150ba598bf0 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -3607,7 +3607,7 @@ static void gen6_enable_rps(struct drm_device *dev) gen6_gt_force_wake_put(dev_priv); } -static void gen6_update_ring_freq(struct drm_device *dev) +void gen6_update_ring_freq(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; int min_freq = 15; @@ -5398,6 +5398,17 @@ void intel_init_power_well(struct drm_device *dev) I915_WRITE(HSW_PWR_WELL_BIOS, 0); } +/* Disables PC8 so we can use the GMBUS and DP AUX interrupts. */ +void intel_aux_display_runtime_get(struct drm_i915_private *dev_priv) +{ + hsw_disable_package_c8(dev_priv); +} + +void intel_aux_display_runtime_put(struct drm_i915_private *dev_priv) +{ + hsw_enable_package_c8(dev_priv); +} + /* Set up chip specific power management-related functions */ void intel_init_pm(struct drm_device *dev) { |