| /* i915_irq.c -- IRQ support for the I915 -*- linux-c -*- |
| */ |
| /* |
| * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas. |
| * 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 TUNGSTEN GRAPHICS 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. |
| * |
| */ |
| |
| #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| |
| #include <linux/sysrq.h> |
| #include <linux/slab.h> |
| #include <linux/circ_buf.h> |
| #include <drm/drmP.h> |
| #include <drm/i915_drm.h> |
| #include "i915_drv.h" |
| #include "i915_trace.h" |
| #include "intel_drv.h" |
| |
| static const u32 hpd_ibx[] = { |
| [HPD_CRT] = SDE_CRT_HOTPLUG, |
| [HPD_SDVO_B] = SDE_SDVOB_HOTPLUG, |
| [HPD_PORT_B] = SDE_PORTB_HOTPLUG, |
| [HPD_PORT_C] = SDE_PORTC_HOTPLUG, |
| [HPD_PORT_D] = SDE_PORTD_HOTPLUG |
| }; |
| |
| static const u32 hpd_cpt[] = { |
| [HPD_CRT] = SDE_CRT_HOTPLUG_CPT, |
| [HPD_SDVO_B] = SDE_SDVOB_HOTPLUG_CPT, |
| [HPD_PORT_B] = SDE_PORTB_HOTPLUG_CPT, |
| [HPD_PORT_C] = SDE_PORTC_HOTPLUG_CPT, |
| [HPD_PORT_D] = SDE_PORTD_HOTPLUG_CPT |
| }; |
| |
| static const u32 hpd_mask_i915[] = { |
| [HPD_CRT] = CRT_HOTPLUG_INT_EN, |
| [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_EN, |
| [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_EN, |
| [HPD_PORT_B] = PORTB_HOTPLUG_INT_EN, |
| [HPD_PORT_C] = PORTC_HOTPLUG_INT_EN, |
| [HPD_PORT_D] = PORTD_HOTPLUG_INT_EN |
| }; |
| |
| static const u32 hpd_status_gen4[] = { |
| [HPD_CRT] = CRT_HOTPLUG_INT_STATUS, |
| [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_STATUS_G4X, |
| [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_STATUS_G4X, |
| [HPD_PORT_B] = PORTB_HOTPLUG_INT_STATUS, |
| [HPD_PORT_C] = PORTC_HOTPLUG_INT_STATUS, |
| [HPD_PORT_D] = PORTD_HOTPLUG_INT_STATUS |
| }; |
| |
| static const u32 hpd_status_i915[] = { /* i915 and valleyview are the same */ |
| [HPD_CRT] = CRT_HOTPLUG_INT_STATUS, |
| [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_STATUS_I915, |
| [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_STATUS_I915, |
| [HPD_PORT_B] = PORTB_HOTPLUG_INT_STATUS, |
| [HPD_PORT_C] = PORTC_HOTPLUG_INT_STATUS, |
| [HPD_PORT_D] = PORTD_HOTPLUG_INT_STATUS |
| }; |
| |
| /* For display hotplug interrupt */ |
| static void |
| 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); |
| POSTING_READ(DEIMR); |
| } |
| } |
| |
| static void |
| 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); |
| POSTING_READ(DEIMR); |
| } |
| } |
| |
| /** |
| * ilk_update_gt_irq - update GTIMR |
| * @dev_priv: driver private |
| * @interrupt_mask: mask of interrupt bits to update |
| * @enabled_irq_mask: mask of interrupt bits to enable |
| */ |
| static void ilk_update_gt_irq(struct drm_i915_private *dev_priv, |
| uint32_t interrupt_mask, |
| uint32_t enabled_irq_mask) |
| { |
| 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); |
| POSTING_READ(GTIMR); |
| } |
| |
| void ilk_enable_gt_irq(struct drm_i915_private *dev_priv, uint32_t mask) |
| { |
| ilk_update_gt_irq(dev_priv, mask, mask); |
| } |
| |
| void ilk_disable_gt_irq(struct drm_i915_private *dev_priv, uint32_t mask) |
| { |
| ilk_update_gt_irq(dev_priv, mask, 0); |
| } |
| |
| /** |
| * snb_update_pm_irq - update GEN6_PMIMR |
| * @dev_priv: driver private |
| * @interrupt_mask: mask of interrupt bits to update |
| * @enabled_irq_mask: mask of interrupt bits to enable |
| */ |
| static void snb_update_pm_irq(struct drm_i915_private *dev_priv, |
| uint32_t interrupt_mask, |
| uint32_t enabled_irq_mask) |
| { |
| uint32_t new_val; |
| |
| 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); |
| |
| if (new_val != dev_priv->pm_irq_mask) { |
| dev_priv->pm_irq_mask = new_val; |
| I915_WRITE(GEN6_PMIMR, dev_priv->pm_irq_mask); |
| POSTING_READ(GEN6_PMIMR); |
| } |
| } |
| |
| void snb_enable_pm_irq(struct drm_i915_private *dev_priv, uint32_t mask) |
| { |
| snb_update_pm_irq(dev_priv, mask, mask); |
| } |
| |
| void snb_disable_pm_irq(struct drm_i915_private *dev_priv, uint32_t mask) |
| { |
| snb_update_pm_irq(dev_priv, mask, 0); |
| } |
| |
| static bool ivb_can_enable_err_int(struct drm_device *dev) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| struct intel_crtc *crtc; |
| enum pipe pipe; |
| |
| assert_spin_locked(&dev_priv->irq_lock); |
| |
| for_each_pipe(pipe) { |
| crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]); |
| |
| if (crtc->cpu_fifo_underrun_disabled) |
| return false; |
| } |
| |
| return true; |
| } |
| |
| static bool cpt_can_enable_serr_int(struct drm_device *dev) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| enum pipe pipe; |
| struct intel_crtc *crtc; |
| |
| assert_spin_locked(&dev_priv->irq_lock); |
| |
| for_each_pipe(pipe) { |
| crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]); |
| |
| if (crtc->pch_fifo_underrun_disabled) |
| return false; |
| } |
| |
| return true; |
| } |
| |
| static void ironlake_set_fifo_underrun_reporting(struct drm_device *dev, |
| enum pipe pipe, bool enable) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| uint32_t bit = (pipe == PIPE_A) ? DE_PIPEA_FIFO_UNDERRUN : |
| DE_PIPEB_FIFO_UNDERRUN; |
| |
| if (enable) |
| ironlake_enable_display_irq(dev_priv, bit); |
| else |
| ironlake_disable_display_irq(dev_priv, bit); |
| } |
| |
| static void ivybridge_set_fifo_underrun_reporting(struct drm_device *dev, |
| enum pipe pipe, bool enable) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| if (enable) { |
| I915_WRITE(GEN7_ERR_INT, ERR_INT_FIFO_UNDERRUN(pipe)); |
| |
| if (!ivb_can_enable_err_int(dev)) |
| return; |
| |
| ironlake_enable_display_irq(dev_priv, DE_ERR_INT_IVB); |
| } else { |
| bool was_enabled = !(I915_READ(DEIMR) & DE_ERR_INT_IVB); |
| |
| /* Change the state _after_ we've read out the current one. */ |
| ironlake_disable_display_irq(dev_priv, DE_ERR_INT_IVB); |
| |
| if (!was_enabled && |
| (I915_READ(GEN7_ERR_INT) & ERR_INT_FIFO_UNDERRUN(pipe))) { |
| DRM_DEBUG_KMS("uncleared fifo underrun on pipe %c\n", |
| pipe_name(pipe)); |
| } |
| } |
| } |
| |
| /** |
| * ibx_display_interrupt_update - update SDEIMR |
| * @dev_priv: driver private |
| * @interrupt_mask: mask of interrupt bits to update |
| * @enabled_irq_mask: mask of interrupt bits to enable |
| */ |
| static void ibx_display_interrupt_update(struct drm_i915_private *dev_priv, |
| uint32_t interrupt_mask, |
| uint32_t enabled_irq_mask) |
| { |
| uint32_t sdeimr = I915_READ(SDEIMR); |
| sdeimr &= ~interrupt_mask; |
| sdeimr |= (~enabled_irq_mask & interrupt_mask); |
| |
| 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); |
| } |
| #define ibx_enable_display_interrupt(dev_priv, bits) \ |
| ibx_display_interrupt_update((dev_priv), (bits), (bits)) |
| #define ibx_disable_display_interrupt(dev_priv, bits) \ |
| ibx_display_interrupt_update((dev_priv), (bits), 0) |
| |
| static void ibx_set_fifo_underrun_reporting(struct drm_device *dev, |
| enum transcoder pch_transcoder, |
| bool enable) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| uint32_t bit = (pch_transcoder == TRANSCODER_A) ? |
| SDE_TRANSA_FIFO_UNDER : SDE_TRANSB_FIFO_UNDER; |
| |
| if (enable) |
| ibx_enable_display_interrupt(dev_priv, bit); |
| else |
| ibx_disable_display_interrupt(dev_priv, bit); |
| } |
| |
| static void cpt_set_fifo_underrun_reporting(struct drm_device *dev, |
| enum transcoder pch_transcoder, |
| bool enable) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| |
| if (enable) { |
| I915_WRITE(SERR_INT, |
| SERR_INT_TRANS_FIFO_UNDERRUN(pch_transcoder)); |
| |
| if (!cpt_can_enable_serr_int(dev)) |
| return; |
| |
| ibx_enable_display_interrupt(dev_priv, SDE_ERROR_CPT); |
| } else { |
| uint32_t tmp = I915_READ(SERR_INT); |
| bool was_enabled = !(I915_READ(SDEIMR) & SDE_ERROR_CPT); |
| |
| /* Change the state _after_ we've read out the current one. */ |
| ibx_disable_display_interrupt(dev_priv, SDE_ERROR_CPT); |
| |
| if (!was_enabled && |
| (tmp & SERR_INT_TRANS_FIFO_UNDERRUN(pch_transcoder))) { |
| DRM_DEBUG_KMS("uncleared pch fifo underrun on pch transcoder %c\n", |
| transcoder_name(pch_transcoder)); |
| } |
| } |
| } |
| |
| /** |
| * intel_set_cpu_fifo_underrun_reporting - enable/disable FIFO underrun messages |
| * @dev: drm device |
| * @pipe: pipe |
| * @enable: true if we want to report FIFO underrun errors, false otherwise |
| * |
| * This function makes us disable or enable CPU fifo underruns for a specific |
| * pipe. Notice that on some Gens (e.g. IVB, HSW), disabling FIFO underrun |
| * reporting for one pipe may also disable all the other CPU error interruts for |
| * the other pipes, due to the fact that there's just one interrupt mask/enable |
| * bit for all the pipes. |
| * |
| * Returns the previous state of underrun reporting. |
| */ |
| bool intel_set_cpu_fifo_underrun_reporting(struct drm_device *dev, |
| enum pipe pipe, bool enable) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe]; |
| struct intel_crtc *intel_crtc = to_intel_crtc(crtc); |
| unsigned long flags; |
| bool ret; |
| |
| spin_lock_irqsave(&dev_priv->irq_lock, flags); |
| |
| ret = !intel_crtc->cpu_fifo_underrun_disabled; |
| |
| if (enable == ret) |
| goto done; |
| |
| intel_crtc->cpu_fifo_underrun_disabled = !enable; |
| |
| if (IS_GEN5(dev) || IS_GEN6(dev)) |
| ironlake_set_fifo_underrun_reporting(dev, pipe, enable); |
| else if (IS_GEN7(dev)) |
| ivybridge_set_fifo_underrun_reporting(dev, pipe, enable); |
| |
| done: |
| spin_unlock_irqrestore(&dev_priv->irq_lock, flags); |
| return ret; |
| } |
| |
| /** |
| * intel_set_pch_fifo_underrun_reporting - enable/disable FIFO underrun messages |
| * @dev: drm device |
| * @pch_transcoder: the PCH transcoder (same as pipe on IVB and older) |
| * @enable: true if we want to report FIFO underrun errors, false otherwise |
| * |
| * This function makes us disable or enable PCH fifo underruns for a specific |
| * PCH transcoder. Notice that on some PCHs (e.g. CPT/PPT), disabling FIFO |
| * underrun reporting for one transcoder may also disable all the other PCH |
| * error interruts for the other transcoders, due to the fact that there's just |
| * one interrupt mask/enable bit for all the transcoders. |
| * |
| * Returns the previous state of underrun reporting. |
| */ |
| bool intel_set_pch_fifo_underrun_reporting(struct drm_device *dev, |
| enum transcoder pch_transcoder, |
| bool enable) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pch_transcoder]; |
| struct intel_crtc *intel_crtc = to_intel_crtc(crtc); |
| unsigned long flags; |
| bool ret; |
| |
| /* |
| * NOTE: Pre-LPT has a fixed cpu pipe -> pch transcoder mapping, but LPT |
| * has only one pch transcoder A that all pipes can use. To avoid racy |
| * pch transcoder -> pipe lookups from interrupt code simply store the |
| * underrun statistics in crtc A. Since we never expose this anywhere |
| * nor use it outside of the fifo underrun code here using the "wrong" |
| * crtc on LPT won't cause issues. |
| */ |
| |
| spin_lock_irqsave(&dev_priv->irq_lock, flags); |
| |
| ret = !intel_crtc->pch_fifo_underrun_disabled; |
| |
| if (enable == ret) |
| goto done; |
| |
| intel_crtc->pch_fifo_underrun_disabled = !enable; |
| |
| if (HAS_PCH_IBX(dev)) |
| ibx_set_fifo_underrun_reporting(dev, pch_transcoder, enable); |
| else |
| cpt_set_fifo_underrun_reporting(dev, pch_transcoder, enable); |
| |
| done: |
| spin_unlock_irqrestore(&dev_priv->irq_lock, flags); |
| return ret; |
| } |
| |
| |
| void |
| i915_enable_pipestat(drm_i915_private_t *dev_priv, enum pipe pipe, u32 mask) |
| { |
| u32 reg = PIPESTAT(pipe); |
| u32 pipestat = I915_READ(reg) & 0x7fff0000; |
| |
| assert_spin_locked(&dev_priv->irq_lock); |
| |
| if ((pipestat & mask) == mask) |
| return; |
| |
| /* Enable the interrupt, clear any pending status */ |
| pipestat |= mask | (mask >> 16); |
| I915_WRITE(reg, pipestat); |
| POSTING_READ(reg); |
| } |
| |
| void |
| i915_disable_pipestat(drm_i915_private_t *dev_priv, enum pipe pipe, u32 mask) |
| { |
| u32 reg = PIPESTAT(pipe); |
| u32 pipestat = I915_READ(reg) & 0x7fff0000; |
| |
| assert_spin_locked(&dev_priv->irq_lock); |
| |
| if ((pipestat & mask) == 0) |
| return; |
| |
| pipestat &= ~mask; |
| I915_WRITE(reg, pipestat); |
| POSTING_READ(reg); |
| } |
| |
| /** |
| * i915_enable_asle_pipestat - enable ASLE pipestat for OpRegion |
| */ |
| static void i915_enable_asle_pipestat(struct drm_device *dev) |
| { |
| drm_i915_private_t *dev_priv = dev->dev_private; |
| unsigned long irqflags; |
| |
| if (!dev_priv->opregion.asle || !IS_MOBILE(dev)) |
| return; |
| |
| spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| |
| i915_enable_pipestat(dev_priv, PIPE_B, PIPE_LEGACY_BLC_EVENT_ENABLE); |
| if (INTEL_INFO(dev)->gen >= 4) |
| i915_enable_pipestat(dev_priv, PIPE_A, |
| PIPE_LEGACY_BLC_EVENT_ENABLE); |
| |
| spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| } |
| |
| /** |
| * i915_pipe_enabled - check if a pipe is enabled |
| * @dev: DRM device |
| * @pipe: pipe to check |
| * |
| * Reading certain registers when the pipe is disabled can hang the chip. |
| * Use this routine to make sure the PLL is running and the pipe is active |
| * before reading such registers if unsure. |
| */ |
| static int |
| i915_pipe_enabled(struct drm_device *dev, int pipe) |
| { |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| |
| if (drm_core_check_feature(dev, DRIVER_MODESET)) { |
| /* Locking is horribly broken here, but whatever. */ |
| struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe]; |
| struct intel_crtc *intel_crtc = to_intel_crtc(crtc); |
| |
| return intel_crtc->active; |
| } else { |
| return I915_READ(PIPECONF(pipe)) & PIPECONF_ENABLE; |
| } |
| } |
| |
| static u32 i8xx_get_vblank_counter(struct drm_device *dev, int pipe) |
| { |
| /* Gen2 doesn't have a hardware frame counter */ |
| return 0; |
| } |
| |
| /* Called from drm generic code, passed a 'crtc', which |
| * we use as a pipe index |
| */ |
| static u32 i915_get_vblank_counter(struct drm_device *dev, int pipe) |
| { |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| unsigned long high_frame; |
| unsigned long low_frame; |
| u32 high1, high2, low, pixel, vbl_start; |
| |
| if (!i915_pipe_enabled(dev, pipe)) { |
| DRM_DEBUG_DRIVER("trying to get vblank count for disabled " |
| "pipe %c\n", pipe_name(pipe)); |
| return 0; |
| } |
| |
| if (drm_core_check_feature(dev, DRIVER_MODESET)) { |
| struct intel_crtc *intel_crtc = |
| to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]); |
| const struct drm_display_mode *mode = |
| &intel_crtc->config.adjusted_mode; |
| |
| vbl_start = mode->crtc_vblank_start * mode->crtc_htotal; |
| } else { |
| enum transcoder cpu_transcoder = |
| intel_pipe_to_cpu_transcoder(dev_priv, pipe); |
| u32 htotal; |
| |
| htotal = ((I915_READ(HTOTAL(cpu_transcoder)) >> 16) & 0x1fff) + 1; |
| vbl_start = (I915_READ(VBLANK(cpu_transcoder)) & 0x1fff) + 1; |
| |
| vbl_start *= htotal; |
| } |
| |
| high_frame = PIPEFRAME(pipe); |
| low_frame = PIPEFRAMEPIXEL(pipe); |
| |
| /* |
| * High & low register fields aren't synchronized, so make sure |
| * we get a low value that's stable across two reads of the high |
| * register. |
| */ |
| do { |
| high1 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK; |
| low = I915_READ(low_frame); |
| high2 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK; |
| } while (high1 != high2); |
| |
| high1 >>= PIPE_FRAME_HIGH_SHIFT; |
| pixel = low & PIPE_PIXEL_MASK; |
| low >>= PIPE_FRAME_LOW_SHIFT; |
| |
| /* |
| * The frame counter increments at beginning of active. |
| * Cook up a vblank counter by also checking the pixel |
| * counter against vblank start. |
| */ |
| return (((high1 << 8) | low) + (pixel >= vbl_start)) & 0xffffff; |
| } |
| |
| static u32 gm45_get_vblank_counter(struct drm_device *dev, int pipe) |
| { |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| int reg = PIPE_FRMCOUNT_GM45(pipe); |
| |
| if (!i915_pipe_enabled(dev, pipe)) { |
| DRM_DEBUG_DRIVER("trying to get vblank count for disabled " |
| "pipe %c\n", pipe_name(pipe)); |
| return 0; |
| } |
| |
| return I915_READ(reg); |
| } |
| |
| static bool intel_pipe_in_vblank(struct drm_device *dev, enum pipe pipe) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| uint32_t status; |
| |
| if (IS_VALLEYVIEW(dev)) { |
| status = pipe == PIPE_A ? |
| I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT : |
| I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT; |
| |
| return I915_READ(VLV_ISR) & status; |
| } else if (IS_GEN2(dev)) { |
| status = pipe == PIPE_A ? |
| I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT : |
| I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT; |
| |
| return I915_READ16(ISR) & status; |
| } else if (INTEL_INFO(dev)->gen < 5) { |
| status = pipe == PIPE_A ? |
| I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT : |
| I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT; |
| |
| return I915_READ(ISR) & status; |
| } else if (INTEL_INFO(dev)->gen < 7) { |
| status = pipe == PIPE_A ? |
| DE_PIPEA_VBLANK : |
| DE_PIPEB_VBLANK; |
| |
| return I915_READ(DEISR) & status; |
| } else { |
| switch (pipe) { |
| default: |
| case PIPE_A: |
| status = DE_PIPEA_VBLANK_IVB; |
| break; |
| case PIPE_B: |
| status = DE_PIPEB_VBLANK_IVB; |
| break; |
| case PIPE_C: |
| status = DE_PIPEC_VBLANK_IVB; |
| break; |
| } |
| |
| return I915_READ(DEISR) & status; |
| } |
| } |
| |
| static int i915_get_crtc_scanoutpos(struct drm_device *dev, int pipe, |
| int *vpos, int *hpos) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe]; |
| struct intel_crtc *intel_crtc = to_intel_crtc(crtc); |
| const struct drm_display_mode *mode = &intel_crtc->config.adjusted_mode; |
| int position; |
| int vbl_start, vbl_end, htotal, vtotal; |
| bool in_vbl = true; |
| int ret = 0; |
| |
| if (!intel_crtc->active) { |
| DRM_DEBUG_DRIVER("trying to get scanoutpos for disabled " |
| "pipe %c\n", pipe_name(pipe)); |
| return 0; |
| } |
| |
| htotal = mode->crtc_htotal; |
| vtotal = mode->crtc_vtotal; |
| vbl_start = mode->crtc_vblank_start; |
| vbl_end = mode->crtc_vblank_end; |
| |
| ret |= DRM_SCANOUTPOS_VALID | DRM_SCANOUTPOS_ACCURATE; |
| |
| if (IS_GEN2(dev) || IS_G4X(dev) || INTEL_INFO(dev)->gen >= 5) { |
| /* No obvious pixelcount register. Only query vertical |
| * scanout position from Display scan line register. |
| */ |
| if (IS_GEN2(dev)) |
| position = I915_READ(PIPEDSL(pipe)) & DSL_LINEMASK_GEN2; |
| else |
| position = I915_READ(PIPEDSL(pipe)) & DSL_LINEMASK_GEN3; |
| |
| /* |
| * The scanline counter increments at the leading edge |
| * of hsync, ie. it completely misses the active portion |
| * of the line. Fix up the counter at both edges of vblank |
| * to get a more accurate picture whether we're in vblank |
| * or not. |
| */ |
| in_vbl = intel_pipe_in_vblank(dev, pipe); |
| if ((in_vbl && position == vbl_start - 1) || |
| (!in_vbl && position == vbl_end - 1)) |
| position = (position + 1) % vtotal; |
| } else { |
| /* Have access to pixelcount since start of frame. |
| * We can split this into vertical and horizontal |
| * scanout position. |
| */ |
| position = (I915_READ(PIPEFRAMEPIXEL(pipe)) & PIPE_PIXEL_MASK) >> PIPE_PIXEL_SHIFT; |
| |
| /* convert to pixel counts */ |
| vbl_start *= htotal; |
| vbl_end *= htotal; |
| vtotal *= htotal; |
| } |
| |
| in_vbl = position >= vbl_start && position < vbl_end; |
| |
| /* |
| * While in vblank, position will be negative |
| * counting up towards 0 at vbl_end. And outside |
| * vblank, position will be positive counting |
| * up since vbl_end. |
| */ |
| if (position >= vbl_start) |
| position -= vbl_end; |
| else |
| position += vtotal - vbl_end; |
| |
| if (IS_GEN2(dev) || IS_G4X(dev) || INTEL_INFO(dev)->gen >= 5) { |
| *vpos = position; |
| *hpos = 0; |
| } else { |
| *vpos = position / htotal; |
| *hpos = position - (*vpos * htotal); |
| } |
| |
| /* In vblank? */ |
| if (in_vbl) |
| ret |= DRM_SCANOUTPOS_INVBL; |
| |
| return ret; |
| } |
| |
| static int i915_get_vblank_timestamp(struct drm_device *dev, int pipe, |
| int *max_error, |
| struct timeval *vblank_time, |
| unsigned flags) |
| { |
| struct drm_crtc *crtc; |
| |
| if (pipe < 0 || pipe >= INTEL_INFO(dev)->num_pipes) { |
| DRM_ERROR("Invalid crtc %d\n", pipe); |
| return -EINVAL; |
| } |
| |
| /* Get drm_crtc to timestamp: */ |
| crtc = intel_get_crtc_for_pipe(dev, pipe); |
| if (crtc == NULL) { |
| DRM_ERROR("Invalid crtc %d\n", pipe); |
| return -EINVAL; |
| } |
| |
| if (!crtc->enabled) { |
| DRM_DEBUG_KMS("crtc %d is disabled\n", pipe); |
| return -EBUSY; |
| } |
| |
| /* Helper routine in DRM core does all the work: */ |
| return drm_calc_vbltimestamp_from_scanoutpos(dev, pipe, max_error, |
| vblank_time, flags, |
| crtc); |
| } |
| |
| static bool intel_hpd_irq_event(struct drm_device *dev, |
| struct drm_connector *connector) |
| { |
| enum drm_connector_status old_status; |
| |
| WARN_ON(!mutex_is_locked(&dev->mode_config.mutex)); |
| old_status = connector->status; |
| |
| connector->status = connector->funcs->detect(connector, false); |
| if (old_status == connector->status) |
| return false; |
| |
| DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %s to %s\n", |
| connector->base.id, |
| drm_get_connector_name(connector), |
| drm_get_connector_status_name(old_status), |
| drm_get_connector_status_name(connector->status)); |
| |
| return true; |
| } |
| |
| /* |
| * Handle hotplug events outside the interrupt handler proper. |
| */ |
| #define I915_REENABLE_HOTPLUG_DELAY (2*60*1000) |
| |
| static void i915_hotplug_work_func(struct work_struct *work) |
| { |
| drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t, |
| hotplug_work); |
| struct drm_device *dev = dev_priv->dev; |
| struct drm_mode_config *mode_config = &dev->mode_config; |
| struct intel_connector *intel_connector; |
| struct intel_encoder *intel_encoder; |
| struct drm_connector *connector; |
| unsigned long irqflags; |
| bool hpd_disabled = false; |
| bool changed = false; |
| u32 hpd_event_bits; |
| |
| /* HPD irq before everything is fully set up. */ |
| if (!dev_priv->enable_hotplug_processing) |
| return; |
| |
| mutex_lock(&mode_config->mutex); |
| DRM_DEBUG_KMS("running encoder hotplug functions\n"); |
| |
| spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| |
| hpd_event_bits = dev_priv->hpd_event_bits; |
| dev_priv->hpd_event_bits = 0; |
| list_for_each_entry(connector, &mode_config->connector_list, head) { |
| intel_connector = to_intel_connector(connector); |
| intel_encoder = intel_connector->encoder; |
| if (intel_encoder->hpd_pin > HPD_NONE && |
| dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_MARK_DISABLED && |
| connector->polled == DRM_CONNECTOR_POLL_HPD) { |
| DRM_INFO("HPD interrupt storm detected on connector %s: " |
| "switching from hotplug detection to polling\n", |
| drm_get_connector_name(connector)); |
| dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark = HPD_DISABLED; |
| connector->polled = DRM_CONNECTOR_POLL_CONNECT |
| | DRM_CONNECTOR_POLL_DISCONNECT; |
| hpd_disabled = true; |
| } |
| if (hpd_event_bits & (1 << intel_encoder->hpd_pin)) { |
| DRM_DEBUG_KMS("Connector %s (pin %i) received hotplug event.\n", |
| drm_get_connector_name(connector), intel_encoder->hpd_pin); |
| } |
| } |
| /* if there were no outputs to poll, poll was disabled, |
| * therefore make sure it's enabled when disabling HPD on |
| * some connectors */ |
| if (hpd_disabled) { |
| drm_kms_helper_poll_enable(dev); |
| mod_timer(&dev_priv->hotplug_reenable_timer, |
| jiffies + msecs_to_jiffies(I915_REENABLE_HOTPLUG_DELAY)); |
| } |
| |
| spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| |
| list_for_each_entry(connector, &mode_config->connector_list, head) { |
| intel_connector = to_intel_connector(connector); |
| intel_encoder = intel_connector->encoder; |
| if (hpd_event_bits & (1 << intel_encoder->hpd_pin)) { |
| if (intel_encoder->hot_plug) |
| intel_encoder->hot_plug(intel_encoder); |
| if (intel_hpd_irq_event(dev, connector)) |
| changed = true; |
| } |
| } |
| mutex_unlock(&mode_config->mutex); |
| |
| if (changed) |
| drm_kms_helper_hotplug_event(dev); |
| } |
| |
| static void ironlake_rps_change_irq_handler(struct drm_device *dev) |
| { |
| drm_i915_private_t *dev_priv = dev->dev_private; |
| u32 busy_up, busy_down, max_avg, min_avg; |
| u8 new_delay; |
| |
| spin_lock(&mchdev_lock); |
| |
| I915_WRITE16(MEMINTRSTS, I915_READ(MEMINTRSTS)); |
| |
| new_delay = dev_priv->ips.cur_delay; |
| |
| I915_WRITE16(MEMINTRSTS, MEMINT_EVAL_CHG); |
| busy_up = I915_READ(RCPREVBSYTUPAVG); |
| busy_down = I915_READ(RCPREVBSYTDNAVG); |
| max_avg = I915_READ(RCBMAXAVG); |
| min_avg = I915_READ(RCBMINAVG); |
| |
| /* Handle RCS change request from hw */ |
| if (busy_up > max_avg) { |
| if (dev_priv->ips.cur_delay != dev_priv->ips.max_delay) |
| new_delay = dev_priv->ips.cur_delay - 1; |
| if (new_delay < dev_priv->ips.max_delay) |
| new_delay = dev_priv->ips.max_delay; |
| } else if (busy_down < min_avg) { |
| if (dev_priv->ips.cur_delay != dev_priv->ips.min_delay) |
| new_delay = dev_priv->ips.cur_delay + 1; |
| if (new_delay > dev_priv->ips.min_delay) |
| new_delay = dev_priv->ips.min_delay; |
| } |
| |
| if (ironlake_set_drps(dev, new_delay)) |
| dev_priv->ips.cur_delay = new_delay; |
| |
| spin_unlock(&mchdev_lock); |
| |
| return; |
| } |
| |
| static void notify_ring(struct drm_device *dev, |
| struct intel_ring_buffer *ring) |
| { |
| if (ring->obj == NULL) |
| return; |
| |
| trace_i915_gem_request_complete(ring); |
| |
| wake_up_all(&ring->irq_queue); |
| i915_queue_hangcheck(dev); |
| } |
| |
| static void gen6_pm_rps_work(struct work_struct *work) |
| { |
| drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t, |
| rps.work); |
| u32 pm_iir; |
| int new_delay, adj; |
| |
| spin_lock_irq(&dev_priv->irq_lock); |
| pm_iir = dev_priv->rps.pm_iir; |
| dev_priv->rps.pm_iir = 0; |
| /* Make sure not to corrupt PMIMR state used by ringbuffer code */ |
| snb_enable_pm_irq(dev_priv, GEN6_PM_RPS_EVENTS); |
| spin_unlock_irq(&dev_priv->irq_lock); |
| |
| /* Make sure we didn't queue anything we're not going to process. */ |
| WARN_ON(pm_iir & ~GEN6_PM_RPS_EVENTS); |
| |
| if ((pm_iir & GEN6_PM_RPS_EVENTS) == 0) |
| return; |
| |
| mutex_lock(&dev_priv->rps.hw_lock); |
| |
| adj = dev_priv->rps.last_adj; |
| if (pm_iir & GEN6_PM_RP_UP_THRESHOLD) { |
| if (adj > 0) |
| adj *= 2; |
| else |
| adj = 1; |
| new_delay = dev_priv->rps.cur_delay + adj; |
| |
| /* |
| * For better performance, jump directly |
| * to RPe if we're below it. |
| */ |
| if (new_delay < dev_priv->rps.rpe_delay) |
| new_delay = dev_priv->rps.rpe_delay; |
| } else if (pm_iir & GEN6_PM_RP_DOWN_TIMEOUT) { |
| if (dev_priv->rps.cur_delay > dev_priv->rps.rpe_delay) |
| new_delay = dev_priv->rps.rpe_delay; |
| else |
| new_delay = dev_priv->rps.min_delay; |
| adj = 0; |
| } else if (pm_iir & GEN6_PM_RP_DOWN_THRESHOLD) { |
| if (adj < 0) |
| adj *= 2; |
| else |
| adj = -1; |
| new_delay = dev_priv->rps.cur_delay + adj; |
| } else { /* unknown event */ |
| new_delay = dev_priv->rps.cur_delay; |
| } |
| |
| /* sysfs frequency interfaces may have snuck in while servicing the |
| * interrupt |
| */ |
| new_delay = clamp_t(int, new_delay, |
| dev_priv->rps.min_delay, dev_priv->rps.max_delay); |
| dev_priv->rps.last_adj = new_delay - dev_priv->rps.cur_delay; |
| |
| if (IS_VALLEYVIEW(dev_priv->dev)) |
| valleyview_set_rps(dev_priv->dev, new_delay); |
| else |
| gen6_set_rps(dev_priv->dev, new_delay); |
| |
| mutex_unlock(&dev_priv->rps.hw_lock); |
| } |
| |
| |
| /** |
| * ivybridge_parity_work - Workqueue called when a parity error interrupt |
| * occurred. |
| * @work: workqueue struct |
| * |
| * Doesn't actually do anything except notify userspace. As a consequence of |
| * this event, userspace should try to remap the bad rows since statistically |
| * it is likely the same row is more likely to go bad again. |
| */ |
| static void ivybridge_parity_work(struct work_struct *work) |
| { |
| drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t, |
| l3_parity.error_work); |
| u32 error_status, row, bank, subbank; |
| char *parity_event[6]; |
| uint32_t misccpctl; |
| unsigned long flags; |
| uint8_t slice = 0; |
| |
| /* We must turn off DOP level clock gating to access the L3 registers. |
| * In order to prevent a get/put style interface, acquire struct mutex |
| * any time we access those registers. |
| */ |
| mutex_lock(&dev_priv->dev->struct_mutex); |
| |
| /* If we've screwed up tracking, just let the interrupt fire again */ |
| if (WARN_ON(!dev_priv->l3_parity.which_slice)) |
| goto out; |
| |
| misccpctl = I915_READ(GEN7_MISCCPCTL); |
| I915_WRITE(GEN7_MISCCPCTL, misccpctl & ~GEN7_DOP_CLOCK_GATE_ENABLE); |
| POSTING_READ(GEN7_MISCCPCTL); |
| |
| while ((slice = ffs(dev_priv->l3_parity.which_slice)) != 0) { |
| u32 reg; |
| |
| slice--; |
| if (WARN_ON_ONCE(slice >= NUM_L3_SLICES(dev_priv->dev))) |
| break; |
| |
| dev_priv->l3_parity.which_slice &= ~(1<<slice); |
| |
| reg = GEN7_L3CDERRST1 + (slice * 0x200); |
| |
| error_status = I915_READ(reg); |
| row = GEN7_PARITY_ERROR_ROW(error_status); |
| bank = GEN7_PARITY_ERROR_BANK(error_status); |
| subbank = GEN7_PARITY_ERROR_SUBBANK(error_status); |
| |
| I915_WRITE(reg, GEN7_PARITY_ERROR_VALID | GEN7_L3CDERRST1_ENABLE); |
| POSTING_READ(reg); |
| |
| parity_event[0] = I915_L3_PARITY_UEVENT "=1"; |
| parity_event[1] = kasprintf(GFP_KERNEL, "ROW=%d", row); |
| parity_event[2] = kasprintf(GFP_KERNEL, "BANK=%d", bank); |
| parity_event[3] = kasprintf(GFP_KERNEL, "SUBBANK=%d", subbank); |
| parity_event[4] = kasprintf(GFP_KERNEL, "SLICE=%d", slice); |
| parity_event[5] = NULL; |
| |
| kobject_uevent_env(&dev_priv->dev->primary->kdev.kobj, |
| KOBJ_CHANGE, parity_event); |
| |
| DRM_DEBUG("Parity error: Slice = %d, Row = %d, Bank = %d, Sub bank = %d.\n", |
| slice, row, bank, subbank); |
| |
| kfree(parity_event[4]); |
| kfree(parity_event[3]); |
| kfree(parity_event[2]); |
| kfree(parity_event[1]); |
| } |
| |
| I915_WRITE(GEN7_MISCCPCTL, misccpctl); |
| |
| out: |
| WARN_ON(dev_priv->l3_parity.which_slice); |
| spin_lock_irqsave(&dev_priv->irq_lock, flags); |
| ilk_enable_gt_irq(dev_priv, GT_PARITY_ERROR(dev_priv->dev)); |
| spin_unlock_irqrestore(&dev_priv->irq_lock, flags); |
| |
| mutex_unlock(&dev_priv->dev->struct_mutex); |
| } |
| |
| static void ivybridge_parity_error_irq_handler(struct drm_device *dev, u32 iir) |
| { |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| |
| if (!HAS_L3_DPF(dev)) |
| return; |
| |
| spin_lock(&dev_priv->irq_lock); |
| ilk_disable_gt_irq(dev_priv, GT_PARITY_ERROR(dev)); |
| spin_unlock(&dev_priv->irq_lock); |
| |
| iir &= GT_PARITY_ERROR(dev); |
| if (iir & GT_RENDER_L3_PARITY_ERROR_INTERRUPT_S1) |
| dev_priv->l3_parity.which_slice |= 1 << 1; |
| |
| if (iir & GT_RENDER_L3_PARITY_ERROR_INTERRUPT) |
| dev_priv->l3_parity.which_slice |= 1 << 0; |
| |
| queue_work(dev_priv->wq, &dev_priv->l3_parity.error_work); |
| } |
| |
| static void ilk_gt_irq_handler(struct drm_device *dev, |
| struct drm_i915_private *dev_priv, |
| u32 gt_iir) |
| { |
| if (gt_iir & |
| (GT_RENDER_USER_INTERRUPT | GT_RENDER_PIPECTL_NOTIFY_INTERRUPT)) |
| notify_ring(dev, &dev_priv->ring[RCS]); |
| if (gt_iir & ILK_BSD_USER_INTERRUPT) |
| notify_ring(dev, &dev_priv->ring[VCS]); |
| } |
| |
| static void snb_gt_irq_handler(struct drm_device *dev, |
| struct drm_i915_private *dev_priv, |
| u32 gt_iir) |
| { |
| |
| if (gt_iir & |
| (GT_RENDER_USER_INTERRUPT | GT_RENDER_PIPECTL_NOTIFY_INTERRUPT)) |
| notify_ring(dev, &dev_priv->ring[RCS]); |
| if (gt_iir & GT_BSD_USER_INTERRUPT) |
| notify_ring(dev, &dev_priv->ring[VCS]); |
| if (gt_iir & GT_BLT_USER_INTERRUPT) |
| notify_ring(dev, &dev_priv->ring[BCS]); |
| |
| if (gt_iir & (GT_BLT_CS_ERROR_INTERRUPT | |
| GT_BSD_CS_ERROR_INTERRUPT | |
| GT_RENDER_CS_MASTER_ERROR_INTERRUPT)) { |
| DRM_ERROR("GT error interrupt 0x%08x\n", gt_iir); |
| i915_handle_error(dev, false); |
| } |
| |
| if (gt_iir & GT_PARITY_ERROR(dev)) |
| ivybridge_parity_error_irq_handler(dev, gt_iir); |
| } |
| |
| #define HPD_STORM_DETECT_PERIOD 1000 |
| #define HPD_STORM_THRESHOLD 5 |
| |
| static inline void intel_hpd_irq_handler(struct drm_device *dev, |
| u32 hotplug_trigger, |
| const u32 *hpd) |
| { |
| drm_i915_private_t *dev_priv = dev->dev_private; |
| int i; |
| bool storm_detected = false; |
| |
| if (!hotplug_trigger) |
| return; |
| |
| spin_lock(&dev_priv->irq_lock); |
| for (i = 1; i < HPD_NUM_PINS; i++) { |
| |
| WARN(((hpd[i] & hotplug_trigger) && |
| dev_priv->hpd_stats[i].hpd_mark != HPD_ENABLED), |
| "Received HPD interrupt although disabled\n"); |
| |
| if (!(hpd[i] & hotplug_trigger) || |
| dev_priv->hpd_stats[i].hpd_mark != HPD_ENABLED) |
| continue; |
| |
| dev_priv->hpd_event_bits |= (1 << i); |
| if (!time_in_range(jiffies, dev_priv->hpd_stats[i].hpd_last_jiffies, |
| dev_priv->hpd_stats[i].hpd_last_jiffies |
| + msecs_to_jiffies(HPD_STORM_DETECT_PERIOD))) { |
| dev_priv->hpd_stats[i].hpd_last_jiffies = jiffies; |
| dev_priv->hpd_stats[i].hpd_cnt = 0; |
| DRM_DEBUG_KMS("Received HPD interrupt on PIN %d - cnt: 0\n", i); |
| } else if (dev_priv->hpd_stats[i].hpd_cnt > HPD_STORM_THRESHOLD) { |
| dev_priv->hpd_stats[i].hpd_mark = HPD_MARK_DISABLED; |
| dev_priv->hpd_event_bits &= ~(1 << i); |
| DRM_DEBUG_KMS("HPD interrupt storm detected on PIN %d\n", i); |
| storm_detected = true; |
| } else { |
| dev_priv->hpd_stats[i].hpd_cnt++; |
| DRM_DEBUG_KMS("Received HPD interrupt on PIN %d - cnt: %d\n", i, |
| dev_priv->hpd_stats[i].hpd_cnt); |
| } |
| } |
| |
| if (storm_detected) |
| dev_priv->display.hpd_irq_setup(dev); |
| spin_unlock(&dev_priv->irq_lock); |
| |
| /* |
| * Our hotplug handler can grab modeset locks (by calling down into the |
| * fb helpers). Hence it must not be run on our own dev-priv->wq work |
| * queue for otherwise the flush_work in the pageflip code will |
| * deadlock. |
| */ |
| schedule_work(&dev_priv->hotplug_work); |
| } |
| |
| static void gmbus_irq_handler(struct drm_device *dev) |
| { |
| struct drm_i915_private *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| |
| wake_up_all(&dev_priv->gmbus_wait_queue); |
| } |
| |
| static void dp_aux_irq_handler(struct drm_device *dev) |
| { |
| struct drm_i915_private *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| |
| wake_up_all(&dev_priv->gmbus_wait_queue); |
| } |
| |
| #if defined(CONFIG_DEBUG_FS) |
| static void display_pipe_crc_irq_handler(struct drm_device *dev, enum pipe pipe, |
| uint32_t crc0, uint32_t crc1, |
| uint32_t crc2, uint32_t crc3, |
| uint32_t crc4) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| struct intel_pipe_crc *pipe_crc = &dev_priv->pipe_crc[pipe]; |
| struct intel_pipe_crc_entry *entry; |
| int head, tail; |
| |
| spin_lock(&pipe_crc->lock); |
| |
| if (!pipe_crc->entries) { |
| spin_unlock(&pipe_crc->lock); |
| DRM_ERROR("spurious interrupt\n"); |
| return; |
| } |
| |
| head = pipe_crc->head; |
| tail = pipe_crc->tail; |
| |
| if (CIRC_SPACE(head, tail, INTEL_PIPE_CRC_ENTRIES_NR) < 1) { |
| spin_unlock(&pipe_crc->lock); |
| DRM_ERROR("CRC buffer overflowing\n"); |
| return; |
| } |
| |
| entry = &pipe_crc->entries[head]; |
| |
| entry->frame = dev->driver->get_vblank_counter(dev, pipe); |
| entry->crc[0] = crc0; |
| entry->crc[1] = crc1; |
| entry->crc[2] = crc2; |
| entry->crc[3] = crc3; |
| entry->crc[4] = crc4; |
| |
| head = (head + 1) & (INTEL_PIPE_CRC_ENTRIES_NR - 1); |
| pipe_crc->head = head; |
| |
| spin_unlock(&pipe_crc->lock); |
| |
| wake_up_interruptible(&pipe_crc->wq); |
| } |
| #else |
| static inline void |
| display_pipe_crc_irq_handler(struct drm_device *dev, enum pipe pipe, |
| uint32_t crc0, uint32_t crc1, |
| uint32_t crc2, uint32_t crc3, |
| uint32_t crc4) {} |
| #endif |
| |
| |
| static void hsw_pipe_crc_irq_handler(struct drm_device *dev, enum pipe pipe) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| |
| display_pipe_crc_irq_handler(dev, pipe, |
| I915_READ(PIPE_CRC_RES_1_IVB(pipe)), |
| 0, 0, 0, 0); |
| } |
| |
| static void ivb_pipe_crc_irq_handler(struct drm_device *dev, enum pipe pipe) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| |
| display_pipe_crc_irq_handler(dev, pipe, |
| I915_READ(PIPE_CRC_RES_1_IVB(pipe)), |
| I915_READ(PIPE_CRC_RES_2_IVB(pipe)), |
| I915_READ(PIPE_CRC_RES_3_IVB(pipe)), |
| I915_READ(PIPE_CRC_RES_4_IVB(pipe)), |
| I915_READ(PIPE_CRC_RES_5_IVB(pipe))); |
| } |
| |
| static void i9xx_pipe_crc_irq_handler(struct drm_device *dev, enum pipe pipe) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| uint32_t res1, res2; |
| |
| if (INTEL_INFO(dev)->gen >= 3) |
| res1 = I915_READ(PIPE_CRC_RES_RES1_I915(pipe)); |
| else |
| res1 = 0; |
| |
| if (INTEL_INFO(dev)->gen >= 5 || IS_G4X(dev)) |
| res2 = I915_READ(PIPE_CRC_RES_RES2_G4X(pipe)); |
| else |
| res2 = 0; |
| |
| display_pipe_crc_irq_handler(dev, pipe, |
| I915_READ(PIPE_CRC_RES_RED(pipe)), |
| I915_READ(PIPE_CRC_RES_GREEN(pipe)), |
| I915_READ(PIPE_CRC_RES_BLUE(pipe)), |
| res1, res2); |
| } |
| |
| /* The RPS events need forcewake, so we add them to a work queue and mask their |
| * IMR bits until the work is done. Other interrupts can be processed without |
| * the work queue. */ |
| static void gen6_rps_irq_handler(struct drm_i915_private *dev_priv, u32 pm_iir) |
| { |
| if (pm_iir & GEN6_PM_RPS_EVENTS) { |
| spin_lock(&dev_priv->irq_lock); |
| dev_priv->rps.pm_iir |= pm_iir & GEN6_PM_RPS_EVENTS; |
| snb_disable_pm_irq(dev_priv, pm_iir & GEN6_PM_RPS_EVENTS); |
| spin_unlock(&dev_priv->irq_lock); |
| |
| queue_work(dev_priv->wq, &dev_priv->rps.work); |
| } |
| |
| if (HAS_VEBOX(dev_priv->dev)) { |
| if (pm_iir & PM_VEBOX_USER_INTERRUPT) |
| notify_ring(dev_priv->dev, &dev_priv->ring[VECS]); |
| |
| if (pm_iir & PM_VEBOX_CS_ERROR_INTERRUPT) { |
| DRM_ERROR("VEBOX CS error interrupt 0x%08x\n", pm_iir); |
| i915_handle_error(dev_priv->dev, false); |
| } |
| } |
| } |
| |
| static irqreturn_t valleyview_irq_handler(int irq, void *arg) |
| { |
| struct drm_device *dev = (struct drm_device *) arg; |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| u32 iir, gt_iir, pm_iir; |
| irqreturn_t ret = IRQ_NONE; |
| unsigned long irqflags; |
| int pipe; |
| u32 pipe_stats[I915_MAX_PIPES]; |
| |
| atomic_inc(&dev_priv->irq_received); |
| |
| while (true) { |
| iir = I915_READ(VLV_IIR); |
| gt_iir = I915_READ(GTIIR); |
| pm_iir = I915_READ(GEN6_PMIIR); |
| |
| if (gt_iir == 0 && pm_iir == 0 && iir == 0) |
| goto out; |
| |
| ret = IRQ_HANDLED; |
| |
| snb_gt_irq_handler(dev, dev_priv, gt_iir); |
| |
| spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| for_each_pipe(pipe) { |
| int reg = PIPESTAT(pipe); |
| pipe_stats[pipe] = I915_READ(reg); |
| |
| /* |
| * Clear the PIPE*STAT regs before the IIR |
| */ |
| if (pipe_stats[pipe] & 0x8000ffff) { |
| if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS) |
| DRM_DEBUG_DRIVER("pipe %c underrun\n", |
| pipe_name(pipe)); |
| I915_WRITE(reg, pipe_stats[pipe]); |
| } |
| } |
| spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| |
| for_each_pipe(pipe) { |
| if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS) |
| drm_handle_vblank(dev, pipe); |
| |
| if (pipe_stats[pipe] & PLANE_FLIPDONE_INT_STATUS_VLV) { |
| intel_prepare_page_flip(dev, pipe); |
| intel_finish_page_flip(dev, pipe); |
| } |
| |
| if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS) |
| i9xx_pipe_crc_irq_handler(dev, pipe); |
| } |
| |
| /* Consume port. Then clear IIR or we'll miss events */ |
| if (iir & I915_DISPLAY_PORT_INTERRUPT) { |
| u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT); |
| u32 hotplug_trigger = hotplug_status & HOTPLUG_INT_STATUS_I915; |
| |
| DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n", |
| hotplug_status); |
| |
| intel_hpd_irq_handler(dev, hotplug_trigger, hpd_status_i915); |
| |
| I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status); |
| I915_READ(PORT_HOTPLUG_STAT); |
| } |
| |
| if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS) |
| gmbus_irq_handler(dev); |
| |
| if (pm_iir) |
| gen6_rps_irq_handler(dev_priv, pm_iir); |
| |
| I915_WRITE(GTIIR, gt_iir); |
| I915_WRITE(GEN6_PMIIR, pm_iir); |
| I915_WRITE(VLV_IIR, iir); |
| } |
| |
| out: |
| return ret; |
| } |
| |
| static void ibx_irq_handler(struct drm_device *dev, u32 pch_iir) |
| { |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| int pipe; |
| u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK; |
| |
| intel_hpd_irq_handler(dev, hotplug_trigger, hpd_ibx); |
| |
| if (pch_iir & SDE_AUDIO_POWER_MASK) { |
| int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK) >> |
| SDE_AUDIO_POWER_SHIFT); |
| DRM_DEBUG_DRIVER("PCH audio power change on port %d\n", |
| port_name(port)); |
| } |
| |
| if (pch_iir & SDE_AUX_MASK) |
| dp_aux_irq_handler(dev); |
| |
| if (pch_iir & SDE_GMBUS) |
| gmbus_irq_handler(dev); |
| |
| if (pch_iir & SDE_AUDIO_HDCP_MASK) |
| DRM_DEBUG_DRIVER("PCH HDCP audio interrupt\n"); |
| |
| if (pch_iir & SDE_AUDIO_TRANS_MASK) |
| DRM_DEBUG_DRIVER("PCH transcoder audio interrupt\n"); |
| |
| if (pch_iir & SDE_POISON) |
| DRM_ERROR("PCH poison interrupt\n"); |
| |
| if (pch_iir & SDE_FDI_MASK) |
| for_each_pipe(pipe) |
| DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n", |
| pipe_name(pipe), |
| I915_READ(FDI_RX_IIR(pipe))); |
| |
| if (pch_iir & (SDE_TRANSB_CRC_DONE | SDE_TRANSA_CRC_DONE)) |
| DRM_DEBUG_DRIVER("PCH transcoder CRC done interrupt\n"); |
| |
| if (pch_iir & (SDE_TRANSB_CRC_ERR | SDE_TRANSA_CRC_ERR)) |
| DRM_DEBUG_DRIVER("PCH transcoder CRC error interrupt\n"); |
| |
| if (pch_iir & SDE_TRANSA_FIFO_UNDER) |
| if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_A, |
| false)) |
| DRM_DEBUG_DRIVER("PCH transcoder A FIFO underrun\n"); |
| |
| if (pch_iir & SDE_TRANSB_FIFO_UNDER) |
| if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_B, |
| false)) |
| DRM_DEBUG_DRIVER("PCH transcoder B FIFO underrun\n"); |
| } |
| |
| static void ivb_err_int_handler(struct drm_device *dev) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| u32 err_int = I915_READ(GEN7_ERR_INT); |
| enum pipe pipe; |
| |
| if (err_int & ERR_INT_POISON) |
| DRM_ERROR("Poison interrupt\n"); |
| |
| for_each_pipe(pipe) { |
| if (err_int & ERR_INT_FIFO_UNDERRUN(pipe)) { |
| if (intel_set_cpu_fifo_underrun_reporting(dev, pipe, |
| false)) |
| DRM_DEBUG_DRIVER("Pipe %c FIFO underrun\n", |
| pipe_name(pipe)); |
| } |
| |
| if (err_int & ERR_INT_PIPE_CRC_DONE(pipe)) { |
| if (IS_IVYBRIDGE(dev)) |
| ivb_pipe_crc_irq_handler(dev, pipe); |
| else |
| hsw_pipe_crc_irq_handler(dev, pipe); |
| } |
| } |
| |
| I915_WRITE(GEN7_ERR_INT, err_int); |
| } |
| |
| static void cpt_serr_int_handler(struct drm_device *dev) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| u32 serr_int = I915_READ(SERR_INT); |
| |
| if (serr_int & SERR_INT_POISON) |
| DRM_ERROR("PCH poison interrupt\n"); |
| |
| if (serr_int & SERR_INT_TRANS_A_FIFO_UNDERRUN) |
| if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_A, |
| false)) |
| DRM_DEBUG_DRIVER("PCH transcoder A FIFO underrun\n"); |
| |
| if (serr_int & SERR_INT_TRANS_B_FIFO_UNDERRUN) |
| if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_B, |
| false)) |
| DRM_DEBUG_DRIVER("PCH transcoder B FIFO underrun\n"); |
| |
| if (serr_int & SERR_INT_TRANS_C_FIFO_UNDERRUN) |
| if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_C, |
| false)) |
| DRM_DEBUG_DRIVER("PCH transcoder C FIFO underrun\n"); |
| |
| I915_WRITE(SERR_INT, serr_int); |
| } |
| |
| static void cpt_irq_handler(struct drm_device *dev, u32 pch_iir) |
| { |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| int pipe; |
| u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK_CPT; |
| |
| intel_hpd_irq_handler(dev, hotplug_trigger, hpd_cpt); |
| |
| if (pch_iir & SDE_AUDIO_POWER_MASK_CPT) { |
| int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK_CPT) >> |
| SDE_AUDIO_POWER_SHIFT_CPT); |
| DRM_DEBUG_DRIVER("PCH audio power change on port %c\n", |
| port_name(port)); |
| } |
| |
| if (pch_iir & SDE_AUX_MASK_CPT) |
| dp_aux_irq_handler(dev); |
| |
| if (pch_iir & SDE_GMBUS_CPT) |
| gmbus_irq_handler(dev); |
| |
| if (pch_iir & SDE_AUDIO_CP_REQ_CPT) |
| DRM_DEBUG_DRIVER("Audio CP request interrupt\n"); |
| |
| if (pch_iir & SDE_AUDIO_CP_CHG_CPT) |
| DRM_DEBUG_DRIVER("Audio CP change interrupt\n"); |
| |
| if (pch_iir & SDE_FDI_MASK_CPT) |
| for_each_pipe(pipe) |
| DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n", |
| pipe_name(pipe), |
| I915_READ(FDI_RX_IIR(pipe))); |
| |
| if (pch_iir & SDE_ERROR_CPT) |
| cpt_serr_int_handler(dev); |
| } |
| |
| static void ilk_display_irq_handler(struct drm_device *dev, u32 de_iir) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| enum pipe pipe; |
| |
| if (de_iir & DE_AUX_CHANNEL_A) |
| dp_aux_irq_handler(dev); |
| |
| if (de_iir & DE_GSE) |
| intel_opregion_asle_intr(dev); |
| |
| if (de_iir & DE_POISON) |
| DRM_ERROR("Poison interrupt\n"); |
| |
| for_each_pipe(pipe) { |
| if (de_iir & DE_PIPE_VBLANK(pipe)) |
| drm_handle_vblank(dev, pipe); |
| |
| if (de_iir & DE_PIPE_FIFO_UNDERRUN(pipe)) |
| if (intel_set_cpu_fifo_underrun_reporting(dev, pipe, false)) |
| DRM_DEBUG_DRIVER("Pipe %c FIFO underrun\n", |
| pipe_name(pipe)); |
| |
| if (de_iir & DE_PIPE_CRC_DONE(pipe)) |
| i9xx_pipe_crc_irq_handler(dev, pipe); |
| |
| /* plane/pipes map 1:1 on ilk+ */ |
| if (de_iir & DE_PLANE_FLIP_DONE(pipe)) { |
| intel_prepare_page_flip(dev, pipe); |
| intel_finish_page_flip_plane(dev, pipe); |
| } |
| } |
| |
| /* check event from PCH */ |
| if (de_iir & DE_PCH_EVENT) { |
| u32 pch_iir = I915_READ(SDEIIR); |
| |
| if (HAS_PCH_CPT(dev)) |
| cpt_irq_handler(dev, pch_iir); |
| else |
| ibx_irq_handler(dev, pch_iir); |
| |
| /* should clear PCH hotplug event before clear CPU irq */ |
| I915_WRITE(SDEIIR, pch_iir); |
| } |
| |
| if (IS_GEN5(dev) && de_iir & DE_PCU_EVENT) |
| ironlake_rps_change_irq_handler(dev); |
| } |
| |
| static void ivb_display_irq_handler(struct drm_device *dev, u32 de_iir) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| enum pipe i; |
| |
| if (de_iir & DE_ERR_INT_IVB) |
| ivb_err_int_handler(dev); |
| |
| if (de_iir & DE_AUX_CHANNEL_A_IVB) |
| dp_aux_irq_handler(dev); |
| |
| if (de_iir & DE_GSE_IVB) |
| intel_opregion_asle_intr(dev); |
| |
| for_each_pipe(i) { |
| if (de_iir & (DE_PIPE_VBLANK_IVB(i))) |
| drm_handle_vblank(dev, i); |
| |
| /* plane/pipes map 1:1 on ilk+ */ |
| if (de_iir & DE_PLANE_FLIP_DONE_IVB(i)) { |
| intel_prepare_page_flip(dev, i); |
| intel_finish_page_flip_plane(dev, i); |
| } |
| } |
| |
| /* check event from PCH */ |
| if (!HAS_PCH_NOP(dev) && (de_iir & DE_PCH_EVENT_IVB)) { |
| u32 pch_iir = I915_READ(SDEIIR); |
| |
| cpt_irq_handler(dev, pch_iir); |
| |
| /* clear PCH hotplug event before clear CPU irq */ |
| I915_WRITE(SDEIIR, pch_iir); |
| } |
| } |
| |
| static irqreturn_t ironlake_irq_handler(int irq, void *arg) |
| { |
| struct drm_device *dev = (struct drm_device *) arg; |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| u32 de_iir, gt_iir, de_ier, sde_ier = 0; |
| irqreturn_t ret = IRQ_NONE; |
| |
| atomic_inc(&dev_priv->irq_received); |
| |
| /* We get interrupts on unclaimed registers, so check for this before we |
| * do any I915_{READ,WRITE}. */ |
| intel_uncore_check_errors(dev); |
| |
| /* disable master interrupt before clearing iir */ |
| de_ier = I915_READ(DEIER); |
| I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL); |
| POSTING_READ(DEIER); |
| |
| /* Disable south interrupts. We'll only write to SDEIIR once, so further |
| * interrupts will will be stored on its back queue, and then we'll be |
| * able to process them after we restore SDEIER (as soon as we restore |
| * it, we'll get an interrupt if SDEIIR still has something to process |
| * due to its back queue). */ |
| if (!HAS_PCH_NOP(dev)) { |
| sde_ier = I915_READ(SDEIER); |
| I915_WRITE(SDEIER, 0); |
| POSTING_READ(SDEIER); |
| } |
| |
| gt_iir = I915_READ(GTIIR); |
| if (gt_iir) { |
| if (INTEL_INFO(dev)->gen >= 6) |
| snb_gt_irq_handler(dev, dev_priv, gt_iir); |
| else |
| ilk_gt_irq_handler(dev, dev_priv, gt_iir); |
| I915_WRITE(GTIIR, gt_iir); |
| ret = IRQ_HANDLED; |
| } |
| |
| de_iir = I915_READ(DEIIR); |
| if (de_iir) { |
| if (INTEL_INFO(dev)->gen >= 7) |
| ivb_display_irq_handler(dev, de_iir); |
| else |
| ilk_display_irq_handler(dev, de_iir); |
| I915_WRITE(DEIIR, de_iir); |
| ret = IRQ_HANDLED; |
| } |
| |
| if (INTEL_INFO(dev)->gen >= 6) { |
| u32 pm_iir = I915_READ(GEN6_PMIIR); |
| if (pm_iir) { |
| gen6_rps_irq_handler(dev_priv, pm_iir); |
| I915_WRITE(GEN6_PMIIR, pm_iir); |
| ret = IRQ_HANDLED; |
| } |
| } |
| |
| I915_WRITE(DEIER, de_ier); |
| POSTING_READ(DEIER); |
| if (!HAS_PCH_NOP(dev)) { |
| I915_WRITE(SDEIER, sde_ier); |
| POSTING_READ(SDEIER); |
| } |
| |
| return ret; |
| } |
| |
| static void i915_error_wake_up(struct drm_i915_private *dev_priv, |
| bool reset_completed) |
| { |
| struct intel_ring_buffer *ring; |
| int i; |
| |
| /* |
| * Notify all waiters for GPU completion events that reset state has |
| * been changed, and that they need to restart their wait after |
| * checking for potential errors (and bail out to drop locks if there is |
| * a gpu reset pending so that i915_error_work_func can acquire them). |
| */ |
| |
| /* Wake up __wait_seqno, potentially holding dev->struct_mutex. */ |
| for_each_ring(ring, dev_priv, i) |
| wake_up_all(&ring->irq_queue); |
| |
| /* Wake up intel_crtc_wait_for_pending_flips, holding crtc->mutex. */ |
| wake_up_all(&dev_priv->pending_flip_queue); |
| |
| /* |
| * Signal tasks blocked in i915_gem_wait_for_error that the pending |
| * reset state is cleared. |
| */ |
| if (reset_completed) |
| wake_up_all(&dev_priv->gpu_error.reset_queue); |
| } |
| |
| /** |
| * i915_error_work_func - do process context error handling work |
| * @work: work struct |
| * |
| * Fire an error uevent so userspace can see that a hang or error |
| * was detected. |
| */ |
| static void i915_error_work_func(struct work_struct *work) |
| { |
| struct i915_gpu_error *error = container_of(work, struct i915_gpu_error, |
| work); |
| drm_i915_private_t *dev_priv = container_of(error, drm_i915_private_t, |
| gpu_error); |
| struct drm_device *dev = dev_priv->dev; |
| char *error_event[] = { I915_ERROR_UEVENT "=1", NULL }; |
| char *reset_event[] = { I915_RESET_UEVENT "=1", NULL }; |
| char *reset_done_event[] = { I915_ERROR_UEVENT "=0", NULL }; |
| int ret; |
| |
| kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, error_event); |
| |
| /* |
| * Note that there's only one work item which does gpu resets, so we |
| * need not worry about concurrent gpu resets potentially incrementing |
| * error->reset_counter twice. We only need to take care of another |
| * racing irq/hangcheck declaring the gpu dead for a second time. A |
| * quick check for that is good enough: schedule_work ensures the |
| * correct ordering between hang detection and this work item, and since |
| * the reset in-progress bit is only ever set by code outside of this |
| * work we don't need to worry about any other races. |
| */ |
| if (i915_reset_in_progress(error) && !i915_terminally_wedged(error)) { |
| DRM_DEBUG_DRIVER("resetting chip\n"); |
| kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, |
| reset_event); |
| |
| /* |
| * All state reset _must_ be completed before we update the |
| * reset counter, for otherwise waiters might miss the reset |
| * pending state and not properly drop locks, resulting in |
| * deadlocks with the reset work. |
| */ |
| ret = i915_reset(dev); |
| |
| intel_display_handle_reset(dev); |
| |
| if (ret == 0) { |
| /* |
| * After all the gem state is reset, increment the reset |
| * counter and wake up everyone waiting for the reset to |
| * complete. |
| * |
| * Since unlock operations are a one-sided barrier only, |
| * we need to insert a barrier here to order any seqno |
| * updates before |
| * the counter increment. |
| */ |
| smp_mb__before_atomic_inc(); |
| atomic_inc(&dev_priv->gpu_error.reset_counter); |
| |
| kobject_uevent_env(&dev->primary->kdev.kobj, |
| KOBJ_CHANGE, reset_done_event); |
| } else { |
| atomic_set_mask(I915_WEDGED, &error->reset_counter); |
| } |
| |
| /* |
| * Note: The wake_up also serves as a memory barrier so that |
| * waiters see the update value of the reset counter atomic_t. |
| */ |
| i915_error_wake_up(dev_priv, true); |
| } |
| } |
| |
| static void i915_report_and_clear_eir(struct drm_device *dev) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| uint32_t instdone[I915_NUM_INSTDONE_REG]; |
| u32 eir = I915_READ(EIR); |
| int pipe, i; |
| |
| if (!eir) |
| return; |
| |
| pr_err("render error detected, EIR: 0x%08x\n", eir); |
| |
| i915_get_extra_instdone(dev, instdone); |
| |
| if (IS_G4X(dev)) { |
| if (eir & (GM45_ERROR_MEM_PRIV | GM45_ERROR_CP_PRIV)) { |
| u32 ipeir = I915_READ(IPEIR_I965); |
| |
| pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965)); |
| pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965)); |
| for (i = 0; i < ARRAY_SIZE(instdone); i++) |
| pr_err(" INSTDONE_%d: 0x%08x\n", i, instdone[i]); |
| pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS)); |
| pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965)); |
| I915_WRITE(IPEIR_I965, ipeir); |
| POSTING_READ(IPEIR_I965); |
| } |
| if (eir & GM45_ERROR_PAGE_TABLE) { |
| u32 pgtbl_err = I915_READ(PGTBL_ER); |
| pr_err("page table error\n"); |
| pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err); |
| I915_WRITE(PGTBL_ER, pgtbl_err); |
| POSTING_READ(PGTBL_ER); |
| } |
| } |
| |
| if (!IS_GEN2(dev)) { |
| if (eir & I915_ERROR_PAGE_TABLE) { |
| u32 pgtbl_err = I915_READ(PGTBL_ER); |
| pr_err("page table error\n"); |
| pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err); |
| I915_WRITE(PGTBL_ER, pgtbl_err); |
| POSTING_READ(PGTBL_ER); |
| } |
| } |
| |
| if (eir & I915_ERROR_MEMORY_REFRESH) { |
| pr_err("memory refresh error:\n"); |
| for_each_pipe(pipe) |
| pr_err("pipe %c stat: 0x%08x\n", |
| pipe_name(pipe), I915_READ(PIPESTAT(pipe))); |
| /* pipestat has already been acked */ |
| } |
| if (eir & I915_ERROR_INSTRUCTION) { |
| pr_err("instruction error\n"); |
| pr_err(" INSTPM: 0x%08x\n", I915_READ(INSTPM)); |
| for (i = 0; i < ARRAY_SIZE(instdone); i++) |
| pr_err(" INSTDONE_%d: 0x%08x\n", i, instdone[i]); |
| if (INTEL_INFO(dev)->gen < 4) { |
| u32 ipeir = I915_READ(IPEIR); |
| |
| pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR)); |
| pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR)); |
| pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD)); |
| I915_WRITE(IPEIR, ipeir); |
| POSTING_READ(IPEIR); |
| } else { |
| u32 ipeir = I915_READ(IPEIR_I965); |
| |
| pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965)); |
| pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965)); |
| pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS)); |
| pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965)); |
| I915_WRITE(IPEIR_I965, ipeir); |
| POSTING_READ(IPEIR_I965); |
| } |
| } |
| |
| I915_WRITE(EIR, eir); |
| POSTING_READ(EIR); |
| eir = I915_READ(EIR); |
| if (eir) { |
| /* |
| * some errors might have become stuck, |
| * mask them. |
| */ |
| DRM_ERROR("EIR stuck: 0x%08x, masking\n", eir); |
| I915_WRITE(EMR, I915_READ(EMR) | eir); |
| I915_WRITE(IIR, I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT); |
| } |
| } |
| |
| /** |
| * i915_handle_error - handle an error interrupt |
| * @dev: drm device |
| * |
| * Do some basic checking of regsiter state at error interrupt time and |
| * dump it to the syslog. Also call i915_capture_error_state() to make |
| * sure we get a record and make it available in debugfs. Fire a uevent |
| * so userspace knows something bad happened (should trigger collection |
| * of a ring dump etc.). |
| */ |
| void i915_handle_error(struct drm_device *dev, bool wedged) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| |
| i915_capture_error_state(dev); |
| i915_report_and_clear_eir(dev); |
| |
| if (wedged) { |
| atomic_set_mask(I915_RESET_IN_PROGRESS_FLAG, |
| &dev_priv->gpu_error.reset_counter); |
| |
| /* |
| * Wakeup waiting processes so that the reset work function |
| * i915_error_work_func doesn't deadlock trying to grab various |
| * locks. By bumping the reset counter first, the woken |
| * processes will see a reset in progress and back off, |
| * releasing their locks and then wait for the reset completion. |
| * We must do this for _all_ gpu waiters that might hold locks |
| * that the reset work needs to acquire. |
| * |
| * Note: The wake_up serves as the required memory barrier to |
| * ensure that the waiters see the updated value of the reset |
| * counter atomic_t. |
| */ |
| i915_error_wake_up(dev_priv, false); |
| } |
| |
| /* |
| * Our reset work can grab modeset locks (since it needs to reset the |
| * state of outstanding pagelips). Hence it must not be run on our own |
| * dev-priv->wq work queue for otherwise the flush_work in the pageflip |
| * code will deadlock. |
| */ |
| schedule_work(&dev_priv->gpu_error.work); |
| } |
| |
| static void __always_unused i915_pageflip_stall_check(struct drm_device *dev, int pipe) |
| { |
| drm_i915_private_t *dev_priv = dev->dev_private; |
| struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe]; |
| struct intel_crtc *intel_crtc = to_intel_crtc(crtc); |
| struct drm_i915_gem_object *obj; |
| struct intel_unpin_work *work; |
| unsigned long flags; |
| bool stall_detected; |
| |
| /* Ignore early vblank irqs */ |
| if (intel_crtc == NULL) |
| return; |
| |
| spin_lock_irqsave(&dev->event_lock, flags); |
| work = intel_crtc->unpin_work; |
| |
| if (work == NULL || |
| atomic_read(&work->pending) >= INTEL_FLIP_COMPLETE || |
| !work->enable_stall_check) { |
| /* Either the pending flip IRQ arrived, or we're too early. Don't check */ |
| spin_unlock_irqrestore(&dev->event_lock, flags); |
| return; |
| } |
| |
| /* Potential stall - if we see that the flip has happened, assume a missed interrupt */ |
| obj = work->pending_flip_obj; |
| if (INTEL_INFO(dev)->gen >= 4) { |
| int dspsurf = DSPSURF(intel_crtc->plane); |
| stall_detected = I915_HI_DISPBASE(I915_READ(dspsurf)) == |
| i915_gem_obj_ggtt_offset(obj); |
| } else { |
| int dspaddr = DSPADDR(intel_crtc->plane); |
| stall_detected = I915_READ(dspaddr) == (i915_gem_obj_ggtt_offset(obj) + |
| crtc->y * crtc->fb->pitches[0] + |
| crtc->x * crtc->fb->bits_per_pixel/8); |
| } |
| |
| spin_unlock_irqrestore(&dev->event_lock, flags); |
| |
| if (stall_detected) { |
| DRM_DEBUG_DRIVER("Pageflip stall detected\n"); |
| intel_prepare_page_flip(dev, intel_crtc->plane); |
| } |
| } |
| |
| /* Called from drm generic code, passed 'crtc' which |
| * we use as a pipe index |
| */ |
| static int i915_enable_vblank(struct drm_device *dev, int pipe) |
| { |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| unsigned long irqflags; |
| |
| if (!i915_pipe_enabled(dev, pipe)) |
| return -EINVAL; |
| |
| spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| if (INTEL_INFO(dev)->gen >= 4) |
| i915_enable_pipestat(dev_priv, pipe, |
| PIPE_START_VBLANK_INTERRUPT_ENABLE); |
| else |
| i915_enable_pipestat(dev_priv, pipe, |
| PIPE_VBLANK_INTERRUPT_ENABLE); |
| |
| /* maintain vblank delivery even in deep C-states */ |
| if (dev_priv->info->gen == 3) |
| I915_WRITE(INSTPM, _MASKED_BIT_DISABLE(INSTPM_AGPBUSY_DIS)); |
| spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| |
| return 0; |
| } |
| |
| static int ironlake_enable_vblank(struct drm_device *dev, int pipe) |
| { |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| unsigned long irqflags; |
| uint32_t bit = (INTEL_INFO(dev)->gen >= 7) ? DE_PIPE_VBLANK_IVB(pipe) : |
| DE_PIPE_VBLANK(pipe); |
| |
| if (!i915_pipe_enabled(dev, pipe)) |
| return -EINVAL; |
| |
| spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| ironlake_enable_display_irq(dev_priv, bit); |
| spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| |
| return 0; |
| } |
| |
| static int valleyview_enable_vblank(struct drm_device *dev, int pipe) |
| { |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| unsigned long irqflags; |
| u32 imr; |
| |
| if (!i915_pipe_enabled(dev, pipe)) |
| return -EINVAL; |
| |
| spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| imr = I915_READ(VLV_IMR); |
| if (pipe == PIPE_A) |
| imr &= ~I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT; |
| else |
| imr &= ~I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT; |
| I915_WRITE(VLV_IMR, imr); |
| i915_enable_pipestat(dev_priv, pipe, |
| PIPE_START_VBLANK_INTERRUPT_ENABLE); |
| spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| |
| return 0; |
| } |
| |
| /* Called from drm generic code, passed 'crtc' which |
| * we use as a pipe index |
| */ |
| static void i915_disable_vblank(struct drm_device *dev, int pipe) |
| { |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| unsigned long irqflags; |
| |
| spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| if (dev_priv->info->gen == 3) |
| I915_WRITE(INSTPM, _MASKED_BIT_ENABLE(INSTPM_AGPBUSY_DIS)); |
| |
| i915_disable_pipestat(dev_priv, pipe, |
| PIPE_VBLANK_INTERRUPT_ENABLE | |
| PIPE_START_VBLANK_INTERRUPT_ENABLE); |
| spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| } |
| |
| static void ironlake_disable_vblank(struct drm_device *dev, int pipe) |
| { |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| unsigned long irqflags; |
| uint32_t bit = (INTEL_INFO(dev)->gen >= 7) ? DE_PIPE_VBLANK_IVB(pipe) : |
| DE_PIPE_VBLANK(pipe); |
| |
| spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| ironlake_disable_display_irq(dev_priv, bit); |
| spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| } |
| |
| static void valleyview_disable_vblank(struct drm_device *dev, int pipe) |
| { |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| unsigned long irqflags; |
| u32 imr; |
| |
| spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| i915_disable_pipestat(dev_priv, pipe, |
| PIPE_START_VBLANK_INTERRUPT_ENABLE); |
| imr = I915_READ(VLV_IMR); |
| if (pipe == PIPE_A) |
| imr |= I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT; |
| else |
| imr |= I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT; |
| I915_WRITE(VLV_IMR, imr); |
| spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| } |
| |
| static u32 |
| ring_last_seqno(struct intel_ring_buffer *ring) |
| { |
| return list_entry(ring->request_list.prev, |
| struct drm_i915_gem_request, list)->seqno; |
| } |
| |
| static bool |
| ring_idle(struct intel_ring_buffer *ring, u32 seqno) |
| { |
| return (list_empty(&ring->request_list) || |
| i915_seqno_passed(seqno, ring_last_seqno(ring))); |
| } |
| |
| static struct intel_ring_buffer * |
| semaphore_waits_for(struct intel_ring_buffer *ring, u32 *seqno) |
| { |
| struct drm_i915_private *dev_priv = ring->dev->dev_private; |
| u32 cmd, ipehr, acthd, acthd_min; |
| |
| ipehr = I915_READ(RING_IPEHR(ring->mmio_base)); |
| if ((ipehr & ~(0x3 << 16)) != |
| (MI_SEMAPHORE_MBOX | MI_SEMAPHORE_COMPARE | MI_SEMAPHORE_REGISTER)) |
| return NULL; |
| |
| /* ACTHD is likely pointing to the dword after the actual command, |
| * so scan backwards until we find the MBOX. |
| */ |
| acthd = intel_ring_get_active_head(ring) & HEAD_ADDR; |
| acthd_min = max((int)acthd - 3 * 4, 0); |
| do { |
| cmd = ioread32(ring->virtual_start + acthd); |
| if (cmd == ipehr) |
| break; |
| |
| acthd -= 4; |
| if (acthd < acthd_min) |
| return NULL; |
| } while (1); |
| |
| *seqno = ioread32(ring->virtual_start+acthd+4)+1; |
| return &dev_priv->ring[(ring->id + (((ipehr >> 17) & 1) + 1)) % 3]; |
| } |
| |
| static int semaphore_passed(struct intel_ring_buffer *ring) |
| { |
| struct drm_i915_private *dev_priv = ring->dev->dev_private; |
| struct intel_ring_buffer *signaller; |
| u32 seqno, ctl; |
| |
| ring->hangcheck.deadlock = true; |
| |
| signaller = semaphore_waits_for(ring, &seqno); |
| if (signaller == NULL || signaller->hangcheck.deadlock) |
| return -1; |
| |
| /* cursory check for an unkickable deadlock */ |
| ctl = I915_READ_CTL(signaller); |
| if (ctl & RING_WAIT_SEMAPHORE && semaphore_passed(signaller) < 0) |
| return -1; |
| |
| return i915_seqno_passed(signaller->get_seqno(signaller, false), seqno); |
| } |
| |
| static void semaphore_clear_deadlocks(struct drm_i915_private *dev_priv) |
| { |
| struct intel_ring_buffer *ring; |
| int i; |
| |
| for_each_ring(ring, dev_priv, i) |
| ring->hangcheck.deadlock = false; |
| } |
| |
| static enum intel_ring_hangcheck_action |
| ring_stuck(struct intel_ring_buffer *ring, u32 acthd) |
| { |
| struct drm_device *dev = ring->dev; |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| u32 tmp; |
| |
| if (ring->hangcheck.acthd != acthd) |
| return HANGCHECK_ACTIVE; |
| |
| if (IS_GEN2(dev)) |
| return HANGCHECK_HUNG; |
| |
| /* Is the chip hanging on a WAIT_FOR_EVENT? |
| * If so we can simply poke the RB_WAIT bit |
| * and break the hang. This should work on |
| * all but the second generation chipsets. |
| */ |
| tmp = I915_READ_CTL(ring); |
| if (tmp & RING_WAIT) { |
| DRM_ERROR("Kicking stuck wait on %s\n", |
| ring->name); |
| i915_handle_error(dev, false); |
| I915_WRITE_CTL(ring, tmp); |
| return HANGCHECK_KICK; |
| } |
| |
| if (INTEL_INFO(dev)->gen >= 6 && tmp & RING_WAIT_SEMAPHORE) { |
| switch (semaphore_passed(ring)) { |
| default: |
| return HANGCHECK_HUNG; |
| case 1: |
| DRM_ERROR("Kicking stuck semaphore on %s\n", |
| ring->name); |
| i915_handle_error(dev, false); |
| I915_WRITE_CTL(ring, tmp); |
| return HANGCHECK_KICK; |
| case 0: |
| return HANGCHECK_WAIT; |
| } |
| } |
| |
| return HANGCHECK_HUNG; |
| } |
| |
| /** |
| * This is called when the chip hasn't reported back with completed |
| * batchbuffers in a long time. We keep track per ring seqno progress and |
| * if there are no progress, hangcheck score for that ring is increased. |
| * Further, acthd is inspected to see if the ring is stuck. On stuck case |
| * we kick the ring. If we see no progress on three subsequent calls |
| * we assume chip is wedged and try to fix it by resetting the chip. |
| */ |
| static void i915_hangcheck_elapsed(unsigned long data) |
| { |
| struct drm_device *dev = (struct drm_device *)data; |
| drm_i915_private_t *dev_priv = dev->dev_private; |
| struct intel_ring_buffer *ring; |
| int i; |
| int busy_count = 0, rings_hung = 0; |
| bool stuck[I915_NUM_RINGS] = { 0 }; |
| #define BUSY 1 |
| #define KICK 5 |
| #define HUNG 20 |
| #define FIRE 30 |
| |
| if (!i915_enable_hangcheck) |
| return; |
| |
| for_each_ring(ring, dev_priv, i) { |
| u32 seqno, acthd; |
| bool busy = true; |
| |
| semaphore_clear_deadlocks(dev_priv); |
| |
| seqno = ring->get_seqno(ring, false); |
| acthd = intel_ring_get_active_head(ring); |
| |
| if (ring->hangcheck.seqno == seqno) { |
| if (ring_idle(ring, seqno)) { |
| ring->hangcheck.action = HANGCHECK_IDLE; |
| |
| if (waitqueue_active(&ring->irq_queue)) { |
| /* Issue a wake-up to catch stuck h/w. */ |
| if (!test_and_set_bit(ring->id, &dev_priv->gpu_error.missed_irq_rings)) { |
| if (!(dev_priv->gpu_error.test_irq_rings & intel_ring_flag(ring))) |
| DRM_ERROR("Hangcheck timer elapsed... %s idle\n", |
| ring->name); |
| else |
| DRM_INFO("Fake missed irq on %s\n", |
| ring->name); |
| wake_up_all(&ring->irq_queue); |
| } |
| /* Safeguard against driver failure */ |
| ring->hangcheck.score += BUSY; |
| } else |
| busy = false; |
| } else { |
| /* We always increment the hangcheck score |
| * if the ring is busy and still processing |
| * the same request, so that no single request |
| * can run indefinitely (such as a chain of |
| * batches). The only time we do not increment |
| * the hangcheck score on this ring, if this |
| * ring is in a legitimate wait for another |
| * ring. In that case the waiting ring is a |
| * victim and we want to be sure we catch the |
| * right culprit. Then every time we do kick |
| * the ring, add a small increment to the |
| * score so that we can catch a batch that is |
| * being repeatedly kicked and so responsible |
| * for stalling the machine. |
| */ |
| ring->hangcheck.action = ring_stuck(ring, |
| acthd); |
| |
| switch (ring->hangcheck.action) { |
| case HANGCHECK_IDLE: |
| case HANGCHECK_WAIT: |
| break; |
| case HANGCHECK_ACTIVE: |
| ring->hangcheck.score += BUSY; |
| break; |
| case HANGCHECK_KICK: |
| ring->hangcheck.score += KICK; |
| break; |
| case HANGCHECK_HUNG: |
| ring->hangcheck.score += HUNG; |
| stuck[i] = true; |
| break; |
| } |
| } |
| } else { |
| ring->hangcheck.action = HANGCHECK_ACTIVE; |
| |
| /* Gradually reduce the count so that we catch DoS |
| * attempts across multiple batches. |
| */ |
| if (ring->hangcheck.score > 0) |
| ring->hangcheck.score--; |
| } |
| |
| ring->hangcheck.seqno = seqno; |
| ring->hangcheck.acthd = acthd; |
| busy_count += busy; |
| } |
| |
| for_each_ring(ring, dev_priv, i) { |
| if (ring->hangcheck.score > FIRE) { |
| DRM_INFO("%s on %s\n", |
| stuck[i] ? "stuck" : "no progress", |
| ring->name); |
| rings_hung++; |
| } |
| } |
| |
| if (rings_hung) |
| return i915_handle_error(dev, true); |
| |
| if (busy_count) |
| /* Reset timer case chip hangs without another request |
| * being added */ |
| i915_queue_hangcheck(dev); |
| } |
| |
| void i915_queue_hangcheck(struct drm_device *dev) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| if (!i915_enable_hangcheck) |
| return; |
| |
| mod_timer(&dev_priv->gpu_error.hangcheck_timer, |
| round_jiffies_up(jiffies + DRM_I915_HANGCHECK_JIFFIES)); |
| } |
| |
| static void ibx_irq_preinstall(struct drm_device *dev) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| |
| if (HAS_PCH_NOP(dev)) |
| return; |
| |
| /* south display irq */ |
| I915_WRITE(SDEIMR, 0xffffffff); |
| /* |
| * SDEIER is also touched by the interrupt handler to work around missed |
| * PCH interrupts. Hence we can't update it after the interrupt handler |
| * is enabled - instead we unconditionally enable all PCH interrupt |
| * sources here, but then only unmask them as needed with SDEIMR. |
| */ |
| I915_WRITE(SDEIER, 0xffffffff); |
| POSTING_READ(SDEIER); |
| } |
| |
| static void gen5_gt_irq_preinstall(struct drm_device *dev) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| |
| /* and GT */ |
| I915_WRITE(GTIMR, 0xffffffff); |
| I915_WRITE(GTIER, 0x0); |
| POSTING_READ(GTIER); |
| |
| if (INTEL_INFO(dev)->gen >= 6) { |
| /* and PM */ |
| I915_WRITE(GEN6_PMIMR, 0xffffffff); |
| I915_WRITE(GEN6_PMIER, 0x0); |
| POSTING_READ(GEN6_PMIER); |
| } |
| } |
| |
| /* drm_dma.h hooks |
| */ |
| static void ironlake_irq_preinstall(struct drm_device *dev) |
| { |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| |
| atomic_set(&dev_priv->irq_received, 0); |
| |
| I915_WRITE(HWSTAM, 0xeffe); |
| |
| I915_WRITE(DEIMR, 0xffffffff); |
| I915_WRITE(DEIER, 0x0); |
| POSTING_READ(DEIER); |
| |
| gen5_gt_irq_preinstall(dev); |
| |
| ibx_irq_preinstall(dev); |
| } |
| |
| static void valleyview_irq_preinstall(struct drm_device *dev) |
| { |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| int pipe; |
| |
| atomic_set(&dev_priv->irq_received, 0); |
| |
| /* VLV magic */ |
| I915_WRITE(VLV_IMR, 0); |
| I915_WRITE(RING_IMR(RENDER_RING_BASE), 0); |
| I915_WRITE(RING_IMR(GEN6_BSD_RING_BASE), 0); |
| I915_WRITE(RING_IMR(BLT_RING_BASE), 0); |
| |
| /* and GT */ |
| I915_WRITE(GTIIR, I915_READ(GTIIR)); |
| I915_WRITE(GTIIR, I915_READ(GTIIR)); |
| |
| gen5_gt_irq_preinstall(dev); |
| |
| I915_WRITE(DPINVGTT, 0xff); |
| |
| I915_WRITE(PORT_HOTPLUG_EN, 0); |
| I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT)); |
| for_each_pipe(pipe) |
| I915_WRITE(PIPESTAT(pipe), 0xffff); |
| I915_WRITE(VLV_IIR, 0xffffffff); |
| I915_WRITE(VLV_IMR, 0xffffffff); |
| I915_WRITE(VLV_IER, 0x0); |
| POSTING_READ(VLV_IER); |
| } |
| |
| static void ibx_hpd_irq_setup(struct drm_device *dev) |
| { |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| struct drm_mode_config *mode_config = &dev->mode_config; |
| struct intel_encoder *intel_encoder; |
| u32 hotplug_irqs, hotplug, enabled_irqs = 0; |
| |
| if (HAS_PCH_IBX(dev)) { |
| hotplug_irqs = SDE_HOTPLUG_MASK; |
| list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head) |
| if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED) |
| enabled_irqs |= hpd_ibx[intel_encoder->hpd_pin]; |
| } else { |
| hotplug_irqs = SDE_HOTPLUG_MASK_CPT; |
| list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head) |
| if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED) |
| enabled_irqs |= hpd_cpt[intel_encoder->hpd_pin]; |
| } |
| |
| ibx_display_interrupt_update(dev_priv, hotplug_irqs, enabled_irqs); |
| |
| /* |
| * Enable digital hotplug on the PCH, and configure the DP short pulse |
| * duration to 2ms (which is the minimum in the Display Port spec) |
| * |
| * This register is the same on all known PCH chips. |
| */ |
| hotplug = I915_READ(PCH_PORT_HOTPLUG); |
| hotplug &= ~(PORTD_PULSE_DURATION_MASK|PORTC_PULSE_DURATION_MASK|PORTB_PULSE_DURATION_MASK); |
| hotplug |= PORTD_HOTPLUG_ENABLE | PORTD_PULSE_DURATION_2ms; |
| hotplug |= PORTC_HOTPLUG_ENABLE | PORTC_PULSE_DURATION_2ms; |
| hotplug |= PORTB_HOTPLUG_ENABLE | PORTB_PULSE_DURATION_2ms; |
| I915_WRITE(PCH_PORT_HOTPLUG, hotplug); |
| } |
| |
| static void ibx_irq_postinstall(struct drm_device *dev) |
| { |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| u32 mask; |
| |
| if (HAS_PCH_NOP(dev)) |
| return; |
| |
| if (HAS_PCH_IBX(dev)) { |
| mask = SDE_GMBUS | SDE_AUX_MASK | SDE_TRANSB_FIFO_UNDER | |
| SDE_TRANSA_FIFO_UNDER | SDE_POISON; |
| } else { |
| mask = SDE_GMBUS_CPT | SDE_AUX_MASK_CPT | SDE_ERROR_CPT; |
| |
| I915_WRITE(SERR_INT, I915_READ(SERR_INT)); |
| } |
| |
| I915_WRITE(SDEIIR, I915_READ(SDEIIR)); |
| I915_WRITE(SDEIMR, ~mask); |
| } |
| |
| static void gen5_gt_irq_postinstall(struct drm_device *dev) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| u32 pm_irqs, gt_irqs; |
| |
| pm_irqs = gt_irqs = 0; |
| |
| dev_priv->gt_irq_mask = ~0; |
| if (HAS_L3_DPF(dev)) { |
| /* L3 parity interrupt is always unmasked. */ |
| dev_priv->gt_irq_mask = ~GT_PARITY_ERROR(dev); |
| gt_irqs |= GT_PARITY_ERROR(dev); |
| } |
| |
| gt_irqs |= GT_RENDER_USER_INTERRUPT; |
| if (IS_GEN5(dev)) { |
| gt_irqs |= GT_RENDER_PIPECTL_NOTIFY_INTERRUPT | |
| ILK_BSD_USER_INTERRUPT; |
| } else { |
| gt_irqs |= GT_BLT_USER_INTERRUPT | GT_BSD_USER_INTERRUPT; |
| } |
| |
| I915_WRITE(GTIIR, I915_READ(GTIIR)); |
| I915_WRITE(GTIMR, dev_priv->gt_irq_mask); |
| I915_WRITE(GTIER, gt_irqs); |
| POSTING_READ(GTIER); |
| |
| if (INTEL_INFO(dev)->gen >= 6) { |
| pm_irqs |= GEN6_PM_RPS_EVENTS; |
| |
| if (HAS_VEBOX(dev)) |
| pm_irqs |= PM_VEBOX_USER_INTERRUPT; |
| |
| dev_priv->pm_irq_mask = 0xffffffff; |
| I915_WRITE(GEN6_PMIIR, I915_READ(GEN6_PMIIR)); |
| I915_WRITE(GEN6_PMIMR, dev_priv->pm_irq_mask); |
| I915_WRITE(GEN6_PMIER, pm_irqs); |
| POSTING_READ(GEN6_PMIER); |
| } |
| } |
| |
| static int ironlake_irq_postinstall(struct drm_device *dev) |
| { |
| unsigned long irqflags; |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| u32 display_mask, extra_mask; |
| |
| if (INTEL_INFO(dev)->gen >= 7) { |
| display_mask = (DE_MASTER_IRQ_CONTROL | DE_GSE_IVB | |
| DE_PCH_EVENT_IVB | DE_PLANEC_FLIP_DONE_IVB | |
| DE_PLANEB_FLIP_DONE_IVB | |
| DE_PLANEA_FLIP_DONE_IVB | DE_AUX_CHANNEL_A_IVB | |
| DE_ERR_INT_IVB); |
| extra_mask = (DE_PIPEC_VBLANK_IVB | DE_PIPEB_VBLANK_IVB | |
| DE_PIPEA_VBLANK_IVB); |
| |
| I915_WRITE(GEN7_ERR_INT, I915_READ(GEN7_ERR_INT)); |
| } else { |
| display_mask = (DE_MASTER_IRQ_CONTROL | DE_GSE | DE_PCH_EVENT | |
| DE_PLANEA_FLIP_DONE | DE_PLANEB_FLIP_DONE | |
| DE_AUX_CHANNEL_A | |
| DE_PIPEB_FIFO_UNDERRUN | DE_PIPEA_FIFO_UNDERRUN | |
| DE_PIPEB_CRC_DONE | DE_PIPEA_CRC_DONE | |
| DE_POISON); |
| extra_mask = DE_PIPEA_VBLANK | DE_PIPEB_VBLANK | DE_PCU_EVENT; |
| } |
| |
| dev_priv->irq_mask = ~display_mask; |
| |
| /* should always can generate irq */ |
| I915_WRITE(DEIIR, I915_READ(DEIIR)); |
| I915_WRITE(DEIMR, dev_priv->irq_mask); |
| I915_WRITE(DEIER, display_mask | extra_mask); |
| POSTING_READ(DEIER); |
| |
| gen5_gt_irq_postinstall(dev); |
| |
| ibx_irq_postinstall(dev); |
| |
| if (IS_IRONLAKE_M(dev)) { |
| /* Enable PCU event interrupts |
| * |
| * spinlocking not required here for correctness since interrupt |
| * setup is guaranteed to run in single-threaded context. But we |
| * need it to make the assert_spin_locked happy. */ |
| spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| ironlake_enable_display_irq(dev_priv, DE_PCU_EVENT); |
| spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| } |
| |
| return 0; |
| } |
| |
| static int valleyview_irq_postinstall(struct drm_device *dev) |
| { |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| u32 enable_mask; |
| u32 pipestat_enable = PLANE_FLIP_DONE_INT_EN_VLV | |
| PIPE_CRC_DONE_ENABLE; |
| unsigned long irqflags; |
| |
| enable_mask = I915_DISPLAY_PORT_INTERRUPT; |
| enable_mask |= I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | |
| I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT | |
| I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | |
| I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT; |
| |
| /* |
| *Leave vblank interrupts masked initially. enable/disable will |
| * toggle them based on usage. |
| */ |
| dev_priv->irq_mask = (~enable_mask) | |
| I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT | |
| I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT; |
| |
| I915_WRITE(PORT_HOTPLUG_EN, 0); |
| POSTING_READ(PORT_HOTPLUG_EN); |
| |
| I915_WRITE(VLV_IMR, dev_priv->irq_mask); |
| I915_WRITE(VLV_IER, enable_mask); |
| I915_WRITE(VLV_IIR, 0xffffffff); |
| I915_WRITE(PIPESTAT(0), 0xffff); |
| I915_WRITE(PIPESTAT(1), 0xffff); |
| POSTING_READ(VLV_IER); |
| |
| /* Interrupt setup is already guaranteed to be single-threaded, this is |
| * just to make the assert_spin_locked check happy. */ |
| spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| i915_enable_pipestat(dev_priv, PIPE_A, pipestat_enable); |
| i915_enable_pipestat(dev_priv, PIPE_A, PIPE_GMBUS_EVENT_ENABLE); |
| i915_enable_pipestat(dev_priv, PIPE_B, pipestat_enable); |
| spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| |
| I915_WRITE(VLV_IIR, 0xffffffff); |
| I915_WRITE(VLV_IIR, 0xffffffff); |
| |
| gen5_gt_irq_postinstall(dev); |
| |
| /* ack & enable invalid PTE error interrupts */ |
| #if 0 /* FIXME: add support to irq handler for checking these bits */ |
| I915_WRITE(DPINVGTT, DPINVGTT_STATUS_MASK); |
| I915_WRITE(DPINVGTT, DPINVGTT_EN_MASK); |
| #endif |
| |
| I915_WRITE(VLV_MASTER_IER, MASTER_INTERRUPT_ENABLE); |
| |
| return 0; |
| } |
| |
| static void valleyview_irq_uninstall(struct drm_device *dev) |
| { |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| int pipe; |
| |
| if (!dev_priv) |
| return; |
| |
| del_timer_sync(&dev_priv->hotplug_reenable_timer); |
| |
| for_each_pipe(pipe) |
| I915_WRITE(PIPESTAT(pipe), 0xffff); |
| |
| I915_WRITE(HWSTAM, 0xffffffff); |
| I915_WRITE(PORT_HOTPLUG_EN, 0); |
| I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT)); |
| for_each_pipe(pipe) |
| I915_WRITE(PIPESTAT(pipe), 0xffff); |
| I915_WRITE(VLV_IIR, 0xffffffff); |
| I915_WRITE(VLV_IMR, 0xffffffff); |
| I915_WRITE(VLV_IER, 0x0); |
| POSTING_READ(VLV_IER); |
| } |
| |
| static void ironlake_irq_uninstall(struct drm_device *dev) |
| { |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| |
| if (!dev_priv) |
| return; |
| |
| del_timer_sync(&dev_priv->hotplug_reenable_timer); |
| |
| I915_WRITE(HWSTAM, 0xffffffff); |
| |
| I915_WRITE(DEIMR, 0xffffffff); |
| I915_WRITE(DEIER, 0x0); |
| I915_WRITE(DEIIR, I915_READ(DEIIR)); |
| if (IS_GEN7(dev)) |
| I915_WRITE(GEN7_ERR_INT, I915_READ(GEN7_ERR_INT)); |
| |
| I915_WRITE(GTIMR, 0xffffffff); |
| I915_WRITE(GTIER, 0x0); |
| I915_WRITE(GTIIR, I915_READ(GTIIR)); |
| |
| if (HAS_PCH_NOP(dev)) |
| return; |
| |
| I915_WRITE(SDEIMR, 0xffffffff); |
| I915_WRITE(SDEIER, 0x0); |
| I915_WRITE(SDEIIR, I915_READ(SDEIIR)); |
| if (HAS_PCH_CPT(dev) || HAS_PCH_LPT(dev)) |
| I915_WRITE(SERR_INT, I915_READ(SERR_INT)); |
| } |
| |
| static void i8xx_irq_preinstall(struct drm_device * dev) |
| { |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| int pipe; |
| |
| atomic_set(&dev_priv->irq_received, 0); |
| |
| for_each_pipe(pipe) |
| I915_WRITE(PIPESTAT(pipe), 0); |
| I915_WRITE16(IMR, 0xffff); |
| I915_WRITE16(IER, 0x0); |
| POSTING_READ16(IER); |
| } |
| |
| static int i8xx_irq_postinstall(struct drm_device *dev) |
| { |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| unsigned long irqflags; |
| |
| I915_WRITE16(EMR, |
| ~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH)); |
| |
| /* Unmask the interrupts that we always want on. */ |
| dev_priv->irq_mask = |
| ~(I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | |
| I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | |
| I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT | |
| I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT | |
| I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT); |
| I915_WRITE16(IMR, dev_priv->irq_mask); |
| |
| I915_WRITE16(IER, |
| I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | |
| I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | |
| I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT | |
| I915_USER_INTERRUPT); |
| POSTING_READ16(IER); |
| |
| /* Interrupt setup is already guaranteed to be single-threaded, this is |
| * just to make the assert_spin_locked check happy. */ |
| spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_ENABLE); |
| i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_ENABLE); |
| spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| |
| return 0; |
| } |
| |
| /* |
| * Returns true when a page flip has completed. |
| */ |
| static bool i8xx_handle_vblank(struct drm_device *dev, |
| int pipe, u16 iir) |
| { |
| drm_i915_private_t *dev_priv = dev->dev_private; |
| u16 flip_pending = DISPLAY_PLANE_FLIP_PENDING(pipe); |
| |
| if (!drm_handle_vblank(dev, pipe)) |
| return false; |
| |
| if ((iir & flip_pending) == 0) |
| return false; |
| |
| intel_prepare_page_flip(dev, pipe); |
| |
| /* We detect FlipDone by looking for the change in PendingFlip from '1' |
| * to '0' on the following vblank, i.e. IIR has the Pendingflip |
| * asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence |
| * the flip is completed (no longer pending). Since this doesn't raise |
| * an interrupt per se, we watch for the change at vblank. |
| */ |
| if (I915_READ16(ISR) & flip_pending) |
| return false; |
| |
| intel_finish_page_flip(dev, pipe); |
| |
| return true; |
| } |
| |
| static irqreturn_t i8xx_irq_handler(int irq, void *arg) |
| { |
| struct drm_device *dev = (struct drm_device *) arg; |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| u16 iir, new_iir; |
| u32 pipe_stats[2]; |
| unsigned long irqflags; |
| int pipe; |
| u16 flip_mask = |
| I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT | |
| I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT; |
| |
| atomic_inc(&dev_priv->irq_received); |
| |
| iir = I915_READ16(IIR); |
| if (iir == 0) |
| return IRQ_NONE; |
| |
| while (iir & ~flip_mask) { |
| /* Can't rely on pipestat interrupt bit in iir as it might |
| * have been cleared after the pipestat interrupt was received. |
| * It doesn't set the bit in iir again, but it still produces |
| * interrupts (for non-MSI). |
| */ |
| spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT) |
| i915_handle_error(dev, false); |
| |
| for_each_pipe(pipe) { |
| int reg = PIPESTAT(pipe); |
| pipe_stats[pipe] = I915_READ(reg); |
| |
| /* |
| * Clear the PIPE*STAT regs before the IIR |
| */ |
| if (pipe_stats[pipe] & 0x8000ffff) { |
| if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS) |
| DRM_DEBUG_DRIVER("pipe %c underrun\n", |
| pipe_name(pipe)); |
| I915_WRITE(reg, pipe_stats[pipe]); |
| } |
| } |
| spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| |
| I915_WRITE16(IIR, iir & ~flip_mask); |
| new_iir = I915_READ16(IIR); /* Flush posted writes */ |
| |
| i915_update_dri1_breadcrumb(dev); |
| |
| if (iir & I915_USER_INTERRUPT) |
| notify_ring(dev, &dev_priv->ring[RCS]); |
| |
| for_each_pipe(pipe) { |
| if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS && |
| i8xx_handle_vblank(dev, pipe, iir)) |
| flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(pipe); |
| |
| if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS) |
| i9xx_pipe_crc_irq_handler(dev, pipe); |
| } |
| |
| iir = new_iir; |
| } |
| |
| return IRQ_HANDLED; |
| } |
| |
| static void i8xx_irq_uninstall(struct drm_device * dev) |
| { |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| int pipe; |
| |
| for_each_pipe(pipe) { |
| /* Clear enable bits; then clear status bits */ |
| I915_WRITE(PIPESTAT(pipe), 0); |
| I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe))); |
| } |
| I915_WRITE16(IMR, 0xffff); |
| I915_WRITE16(IER, 0x0); |
| I915_WRITE16(IIR, I915_READ16(IIR)); |
| } |
| |
| static void i915_irq_preinstall(struct drm_device * dev) |
| { |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| int pipe; |
| |
| atomic_set(&dev_priv->irq_received, 0); |
| |
| if (I915_HAS_HOTPLUG(dev)) { |
| I915_WRITE(PORT_HOTPLUG_EN, 0); |
| I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT)); |
| } |
| |
| I915_WRITE16(HWSTAM, 0xeffe); |
| for_each_pipe(pipe) |
| I915_WRITE(PIPESTAT(pipe), 0); |
| I915_WRITE(IMR, 0xffffffff); |
| I915_WRITE(IER, 0x0); |
| POSTING_READ(IER); |
| } |
| |
| static int i915_irq_postinstall(struct drm_device *dev) |
| { |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| u32 enable_mask; |
| unsigned long irqflags; |
| |
| I915_WRITE(EMR, ~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH)); |
| |
| /* Unmask the interrupts that we always want on. */ |
| dev_priv->irq_mask = |
| ~(I915_ASLE_INTERRUPT | |
| I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | |
| I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | |
| I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT | |
| I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT | |
| I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT); |
| |
| enable_mask = |
| I915_ASLE_INTERRUPT | |
| I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | |
| I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | |
| I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT | |
| I915_USER_INTERRUPT; |
| |
| if (I915_HAS_HOTPLUG(dev)) { |
| I915_WRITE(PORT_HOTPLUG_EN, 0); |
| POSTING_READ(PORT_HOTPLUG_EN); |
| |
| /* Enable in IER... */ |
| enable_mask |= I915_DISPLAY_PORT_INTERRUPT; |
| /* and unmask in IMR */ |
| dev_priv->irq_mask &= ~I915_DISPLAY_PORT_INTERRUPT; |
| } |
| |
| I915_WRITE(IMR, dev_priv->irq_mask); |
| I915_WRITE(IER, enable_mask); |
| POSTING_READ(IER); |
| |
| i915_enable_asle_pipestat(dev); |
| |
| /* Interrupt setup is already guaranteed to be single-threaded, this is |
| * just to make the assert_spin_locked check happy. */ |
| spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_ENABLE); |
| i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_ENABLE); |
| spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| |
| return 0; |
| } |
| |
| /* |
| * Returns true when a page flip has completed. |
| */ |
| static bool i915_handle_vblank(struct drm_device *dev, |
| int plane, int pipe, u32 iir) |
| { |
| drm_i915_private_t *dev_priv = dev->dev_private; |
| u32 flip_pending = DISPLAY_PLANE_FLIP_PENDING(plane); |
| |
| if (!drm_handle_vblank(dev, pipe)) |
| return false; |
| |
| if ((iir & flip_pending) == 0) |
| return false; |
| |
| intel_prepare_page_flip(dev, plane); |
| |
| /* We detect FlipDone by looking for the change in PendingFlip from '1' |
| * to '0' on the following vblank, i.e. IIR has the Pendingflip |
| * asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence |
| * the flip is completed (no longer pending). Since this doesn't raise |
| * an interrupt per se, we watch for the change at vblank. |
| */ |
| if (I915_READ(ISR) & flip_pending) |
| return false; |
| |
| intel_finish_page_flip(dev, pipe); |
| |
| return true; |
| } |
| |
| static irqreturn_t i915_irq_handler(int irq, void *arg) |
| { |
| struct drm_device *dev = (struct drm_device *) arg; |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| u32 iir, new_iir, pipe_stats[I915_MAX_PIPES]; |
| unsigned long irqflags; |
| u32 flip_mask = |
| I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT | |
| I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT; |
| int pipe, ret = IRQ_NONE; |
| |
| atomic_inc(&dev_priv->irq_received); |
| |
| iir = I915_READ(IIR); |
| do { |
| bool irq_received = (iir & ~flip_mask) != 0; |
| bool blc_event = false; |
| |
| /* Can't rely on pipestat interrupt bit in iir as it might |
| * have been cleared after the pipestat interrupt was received. |
| * It doesn't set the bit in iir again, but it still produces |
| * interrupts (for non-MSI). |
| */ |
| spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT) |
| i915_handle_error(dev, false); |
| |
| for_each_pipe(pipe) { |
| int reg = PIPESTAT(pipe); |
| pipe_stats[pipe] = I915_READ(reg); |
| |
| /* Clear the PIPE*STAT regs before the IIR */ |
| if (pipe_stats[pipe] & 0x8000ffff) { |
| if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS) |
| DRM_DEBUG_DRIVER("pipe %c underrun\n", |
| pipe_name(pipe)); |
| I915_WRITE(reg, pipe_stats[pipe]); |
| irq_received = true; |
| } |
| } |
| spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| |
| if (!irq_received) |
| break; |
| |
| /* Consume port. Then clear IIR or we'll miss events */ |
| if ((I915_HAS_HOTPLUG(dev)) && |
| (iir & I915_DISPLAY_PORT_INTERRUPT)) { |
| u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT); |
| u32 hotplug_trigger = hotplug_status & HOTPLUG_INT_STATUS_I915; |
| |
| DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n", |
| hotplug_status); |
| |
| intel_hpd_irq_handler(dev, hotplug_trigger, hpd_status_i915); |
| |
| I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status); |
| POSTING_READ(PORT_HOTPLUG_STAT); |
| } |
| |
| I915_WRITE(IIR, iir & ~flip_mask); |
| new_iir = I915_READ(IIR); /* Flush posted writes */ |
| |
| if (iir & I915_USER_INTERRUPT) |
| notify_ring(dev, &dev_priv->ring[RCS]); |
| |
| for_each_pipe(pipe) { |
| int plane = pipe; |
| if (IS_MOBILE(dev)) |
| plane = !plane; |
| |
| if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS && |
| i915_handle_vblank(dev, plane, pipe, iir)) |
| flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(plane); |
| |
| if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS) |
| blc_event = true; |
| |
| if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS) |
| i9xx_pipe_crc_irq_handler(dev, pipe); |
| } |
| |
| if (blc_event || (iir & I915_ASLE_INTERRUPT)) |
| intel_opregion_asle_intr(dev); |
| |
| /* With MSI, interrupts are only generated when iir |
| * transitions from zero to nonzero. If another bit got |
| * set while we were handling the existing iir bits, then |
| * we would never get another interrupt. |
| * |
| * This is fine on non-MSI as well, as if we hit this path |
| * we avoid exiting the interrupt handler only to generate |
| * another one. |
| * |
| * Note that for MSI this could cause a stray interrupt report |
| * if an interrupt landed in the time between writing IIR and |
| * the posting read. This should be rare enough to never |
| * trigger the 99% of 100,000 interrupts test for disabling |
| * stray interrupts. |
| */ |
| ret = IRQ_HANDLED; |
| iir = new_iir; |
| } while (iir & ~flip_mask); |
| |
| i915_update_dri1_breadcrumb(dev); |
| |
| return ret; |
| } |
| |
| static void i915_irq_uninstall(struct drm_device * dev) |
| { |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| int pipe; |
| |
| del_timer_sync(&dev_priv->hotplug_reenable_timer); |
| |
| if (I915_HAS_HOTPLUG(dev)) { |
| I915_WRITE(PORT_HOTPLUG_EN, 0); |
| I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT)); |
| } |
| |
| I915_WRITE16(HWSTAM, 0xffff); |
| for_each_pipe(pipe) { |
| /* Clear enable bits; then clear status bits */ |
| I915_WRITE(PIPESTAT(pipe), 0); |
| I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe))); |
| } |
| I915_WRITE(IMR, 0xffffffff); |
| I915_WRITE(IER, 0x0); |
| |
| I915_WRITE(IIR, I915_READ(IIR)); |
| } |
| |
| static void i965_irq_preinstall(struct drm_device * dev) |
| { |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| int pipe; |
| |
| atomic_set(&dev_priv->irq_received, 0); |
| |
| I915_WRITE(PORT_HOTPLUG_EN, 0); |
| I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT)); |
| |
| I915_WRITE(HWSTAM, 0xeffe); |
| for_each_pipe(pipe) |
| I915_WRITE(PIPESTAT(pipe), 0); |
| I915_WRITE(IMR, 0xffffffff); |
| I915_WRITE(IER, 0x0); |
| POSTING_READ(IER); |
| } |
| |
| static int i965_irq_postinstall(struct drm_device *dev) |
| { |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| u32 enable_mask; |
| u32 error_mask; |
| unsigned long irqflags; |
| |
| /* Unmask the interrupts that we always want on. */ |
| dev_priv->irq_mask = ~(I915_ASLE_INTERRUPT | |
| I915_DISPLAY_PORT_INTERRUPT | |
| I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | |
| I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | |
| I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT | |
| I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT | |
| I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT); |
| |
| enable_mask = ~dev_priv->irq_mask; |
| enable_mask &= ~(I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT | |
| I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT); |
| enable_mask |= I915_USER_INTERRUPT; |
| |
| if (IS_G4X(dev)) |
| enable_mask |= I915_BSD_USER_INTERRUPT; |
| |
| /* Interrupt setup is already guaranteed to be single-threaded, this is |
| * just to make the assert_spin_locked check happy. */ |
| spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| i915_enable_pipestat(dev_priv, PIPE_A, PIPE_GMBUS_EVENT_ENABLE); |
| i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_ENABLE); |
| i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_ENABLE); |
| spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| |
| /* |
| * Enable some error detection, note the instruction error mask |
| * bit is reserved, so we leave it masked. |
| */ |
| if (IS_G4X(dev)) { |
| error_mask = ~(GM45_ERROR_PAGE_TABLE | |
| GM45_ERROR_MEM_PRIV | |
| GM45_ERROR_CP_PRIV | |
| I915_ERROR_MEMORY_REFRESH); |
| } else { |
| error_mask = ~(I915_ERROR_PAGE_TABLE | |
| I915_ERROR_MEMORY_REFRESH); |
| } |
| I915_WRITE(EMR, error_mask); |
| |
| I915_WRITE(IMR, dev_priv->irq_mask); |
| I915_WRITE(IER, enable_mask); |
| POSTING_READ(IER); |
| |
| I915_WRITE(PORT_HOTPLUG_EN, 0); |
| POSTING_READ(PORT_HOTPLUG_EN); |
| |
| i915_enable_asle_pipestat(dev); |
| |
| return 0; |
| } |
| |
| static void i915_hpd_irq_setup(struct drm_device *dev) |
| { |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| struct drm_mode_config *mode_config = &dev->mode_config; |
| struct intel_encoder *intel_encoder; |
| u32 hotplug_en; |
| |
| assert_spin_locked(&dev_priv->irq_lock); |
| |
| if (I915_HAS_HOTPLUG(dev)) { |
| hotplug_en = I915_READ(PORT_HOTPLUG_EN); |
| hotplug_en &= ~HOTPLUG_INT_EN_MASK; |
| /* Note HDMI and DP share hotplug bits */ |
| /* enable bits are the same for all generations */ |
| list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head) |
| if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED) |
| hotplug_en |= hpd_mask_i915[intel_encoder->hpd_pin]; |
| /* Programming the CRT detection parameters tends |
| to generate a spurious hotplug event about three |
| seconds later. So just do it once. |
| */ |
| if (IS_G4X(dev)) |
| hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64; |
| hotplug_en &= ~CRT_HOTPLUG_VOLTAGE_COMPARE_MASK; |
| hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50; |
| |
| /* Ignore TV since it's buggy */ |
| I915_WRITE(PORT_HOTPLUG_EN, hotplug_en); |
| } |
| } |
| |
| static irqreturn_t i965_irq_handler(int irq, void *arg) |
| { |
| struct drm_device *dev = (struct drm_device *) arg; |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| u32 iir, new_iir; |
| u32 pipe_stats[I915_MAX_PIPES]; |
| unsigned long irqflags; |
| int irq_received; |
| int ret = IRQ_NONE, pipe; |
| u32 flip_mask = |
| I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT | |
| I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT; |
| |
| atomic_inc(&dev_priv->irq_received); |
| |
| iir = I915_READ(IIR); |
| |
| for (;;) { |
| bool blc_event = false; |
| |
| irq_received = (iir & ~flip_mask) != 0; |
| |
| /* Can't rely on pipestat interrupt bit in iir as it might |
| * have been cleared after the pipestat interrupt was received. |
| * It doesn't set the bit in iir again, but it still produces |
| * interrupts (for non-MSI). |
| */ |
| spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT) |
| i915_handle_error(dev, false); |
| |
| for_each_pipe(pipe) { |
| int reg = PIPESTAT(pipe); |
| pipe_stats[pipe] = I915_READ(reg); |
| |
| /* |
| * Clear the PIPE*STAT regs before the IIR |
| */ |
| if (pipe_stats[pipe] & 0x8000ffff) { |
| if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS) |
| DRM_DEBUG_DRIVER("pipe %c underrun\n", |
| pipe_name(pipe)); |
| I915_WRITE(reg, pipe_stats[pipe]); |
| irq_received = 1; |
| } |
| } |
| spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| |
| if (!irq_received) |
| break; |
| |
| ret = IRQ_HANDLED; |
| |
| /* Consume port. Then clear IIR or we'll miss events */ |
| if (iir & I915_DISPLAY_PORT_INTERRUPT) { |
| u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT); |
| u32 hotplug_trigger = hotplug_status & (IS_G4X(dev) ? |
| HOTPLUG_INT_STATUS_G4X : |
| HOTPLUG_INT_STATUS_I915); |
| |
| DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n", |
| hotplug_status); |
| |
| intel_hpd_irq_handler(dev, hotplug_trigger, |
| IS_G4X(dev) ? hpd_status_gen4 : hpd_status_i915); |
| |
| I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status); |
| I915_READ(PORT_HOTPLUG_STAT); |
| } |
| |
| I915_WRITE(IIR, iir & ~flip_mask); |
| new_iir = I915_READ(IIR); /* Flush posted writes */ |
| |
| if (iir & I915_USER_INTERRUPT) |
| notify_ring(dev, &dev_priv->ring[RCS]); |
| if (iir & I915_BSD_USER_INTERRUPT) |
| notify_ring(dev, &dev_priv->ring[VCS]); |
| |
| for_each_pipe(pipe) { |
| if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS && |
| i915_handle_vblank(dev, pipe, pipe, iir)) |
| flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(pipe); |
| |
| if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS) |
| blc_event = true; |
| |
| if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS) |
| i9xx_pipe_crc_irq_handler(dev, pipe); |
| } |
| |
| |
| if (blc_event || (iir & I915_ASLE_INTERRUPT)) |
| intel_opregion_asle_intr(dev); |
| |
| if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS) |
| gmbus_irq_handler(dev); |
| |
| /* With MSI, interrupts are only generated when iir |
| * transitions from zero to nonzero. If another bit got |
| * set while we were handling the existing iir bits, then |
| * we would never get another interrupt. |
| * |
| * This is fine on non-MSI as well, as if we hit this path |
| * we avoid exiting the interrupt handler only to generate |
| * another one. |
| * |
| * Note that for MSI this could cause a stray interrupt report |
| * if an interrupt landed in the time between writing IIR and |
| * the posting read. This should be rare enough to never |
| * trigger the 99% of 100,000 interrupts test for disabling |
| * stray interrupts. |
| */ |
| iir = new_iir; |
| } |
| |
| i915_update_dri1_breadcrumb(dev); |
| |
| return ret; |
| } |
| |
| static void i965_irq_uninstall(struct drm_device * dev) |
| { |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| int pipe; |
| |
| if (!dev_priv) |
| return; |
| |
| del_timer_sync(&dev_priv->hotplug_reenable_timer); |
| |
| I915_WRITE(PORT_HOTPLUG_EN, 0); |
| I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT)); |
| |
| I915_WRITE(HWSTAM, 0xffffffff); |
| for_each_pipe(pipe) |
| I915_WRITE(PIPESTAT(pipe), 0); |
| I915_WRITE(IMR, 0xffffffff); |
| I915_WRITE(IER, 0x0); |
| |
| for_each_pipe(pipe) |
| I915_WRITE(PIPESTAT(pipe), |
| I915_READ(PIPESTAT(pipe)) & 0x8000ffff); |
| I915_WRITE(IIR, I915_READ(IIR)); |
| } |
| |
| static void i915_reenable_hotplug_timer_func(unsigned long data) |
| { |
| drm_i915_private_t *dev_priv = (drm_i915_private_t *)data; |
| struct drm_device *dev = dev_priv->dev; |
| struct drm_mode_config *mode_config = &dev->mode_config; |
| unsigned long irqflags; |
| int i; |
| |
| spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| for (i = (HPD_NONE + 1); i < HPD_NUM_PINS; i++) { |
| struct drm_connector *connector; |
| |
| if (dev_priv->hpd_stats[i].hpd_mark != HPD_DISABLED) |
| continue; |
| |
| dev_priv->hpd_stats[i].hpd_mark = HPD_ENABLED; |
| |
| list_for_each_entry(connector, &mode_config->connector_list, head) { |
| struct intel_connector *intel_connector = to_intel_connector(connector); |
| |
| if (intel_connector->encoder->hpd_pin == i) { |
| if (connector->polled != intel_connector->polled) |
| DRM_DEBUG_DRIVER("Reenabling HPD on connector %s\n", |
| drm_get_connector_name(connector)); |
| connector->polled = intel_connector->polled; |
| if (!connector->polled) |
| connector->polled = DRM_CONNECTOR_POLL_HPD; |
| } |
| } |
| } |
| if (dev_priv->display.hpd_irq_setup) |
| dev_priv->display.hpd_irq_setup(dev); |
| spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); |
| } |
| |
| void intel_irq_init(struct drm_device *dev) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| |
| INIT_WORK(&dev_priv->hotplug_work, i915_hotplug_work_func); |
| INIT_WORK(&dev_priv->gpu_error.work, i915_error_work_func); |
| INIT_WORK(&dev_priv->rps.work, gen6_pm_rps_work); |
| INIT_WORK(&dev_priv->l3_parity.error_work, ivybridge_parity_work); |
| |
| setup_timer(&dev_priv->gpu_error.hangcheck_timer, |
| i915_hangcheck_elapsed, |
| (unsigned long) dev); |
| setup_timer(&dev_priv->hotplug_reenable_timer, i915_reenable_hotplug_timer_func, |
| (unsigned long) dev_priv); |
| |
| pm_qos_add_request(&dev_priv->pm_qos, PM_QOS_CPU_DMA_LATENCY, PM_QOS_DEFAULT_VALUE); |
| |
| if (IS_GEN2(dev)) { |
| dev->max_vblank_count = 0; |
| dev->driver->get_vblank_counter = i8xx_get_vblank_counter; |
| } else if (IS_G4X(dev) || INTEL_INFO(dev)->gen >= 5) { |
| dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */ |
| dev->driver->get_vblank_counter = gm45_get_vblank_counter; |
| } else { |
| dev->driver->get_vblank_counter = i915_get_vblank_counter; |
| dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */ |
| } |
| |
| if (drm_core_check_feature(dev, DRIVER_MODESET)) { |
| dev->driver->get_vblank_timestamp = i915_get_vblank_timestamp; |
| dev->driver->get_scanout_position = i915_get_crtc_scanoutpos; |
| } |
| |
| if (IS_VALLEYVIEW(dev)) { |
| dev->driver->irq_handler = valleyview_irq_handler; |
| dev->driver->irq_preinstall = valleyview_irq_preinstall; |
| dev->driver->irq_postinstall = valleyview_irq_postinstall; |
| dev->driver->irq_uninstall = valleyview_irq_uninstall; |
| dev->driver->enable_vblank = valleyview_enable_vblank; |
| dev->driver->disable_vblank = valleyview_disable_vblank; |
| dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup; |
| } else if (HAS_PCH_SPLIT(dev)) { |
| dev->driver->irq_handler = ironlake_irq_handler; |
| dev->driver->irq_preinstall = ironlake_irq_preinstall; |
| dev->driver->irq_postinstall = ironlake_irq_postinstall; |
| dev->driver->irq_uninstall = ironlake_irq_uninstall; |
| dev->driver->enable_vblank = ironlake_enable_vblank; |
| dev->driver->disable_vblank = ironlake_disable_vblank; |
| dev_priv->display.hpd_irq_setup = ibx_hpd_irq_setup; |
| } else { |
| if (INTEL_INFO(dev)->gen == 2) { |
| dev->driver->irq_preinstall = i8xx_irq_preinstall; |
| dev->driver->irq_postinstall = i8xx_irq_postinstall; |
| dev->driver->irq_handler = i8xx_irq_handler; |
| dev->driver->irq_uninstall = i8xx_irq_uninstall; |
| } else if (INTEL_INFO(dev)->gen == 3) { |
| dev->driver->irq_preinstall = i915_irq_preinstall; |
| dev->driver->irq_postinstall = i915_irq_postinstall; |
| dev->driver->irq_uninstall = i915_irq_uninstall; |
| dev->driver->irq_handler = i915_irq_handler; |
| dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup; |
| } else { |
| dev->driver->irq_preinstall = i965_irq_preinstall; |
| dev->driver->irq_postinstall = i965_irq_postinstall; |
| dev->driver->irq_uninstall = i965_irq_uninstall; |
| dev->driver->irq_handler = i965_irq_handler; |
| dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup; |
| } |
| dev->driver->enable_vblank = i915_enable_vblank; |
| dev->driver->disable_vblank = i915_disable_vblank; |
| } |
| } |
| |
| void intel_hpd_init(struct drm_device *dev) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| struct drm_mode_config *mode_config = &dev->mode_config; |
| struct drm_connector *connector; |
| unsigned long irqflags; |
| int i; |
| |
| for (i = 1; i < HPD_NUM_PINS; i++) { |
| dev_priv->hpd_stats[i].hpd_cnt = 0; |
| dev_priv->hpd_stats[i].hpd_mark = HPD_ENABLED; |
| } |
| list_for_each_entry(connector, &mode_config->connector_list, head) { |
| struct intel_connector *intel_connector = to_intel_connector(connector); |
| connector->polled = intel_connector->polled; |
| if (!connector->polled && I915_HAS_HOTPLUG(dev) && intel_connector->encoder->hpd_pin > HPD_NONE) |
| connector->polled = DRM_CONNECTOR_POLL_HPD; |
| } |
| |
| /* Interrupt setup is already guaranteed to be single-threaded, this is |
| * just to make the assert_spin_locked checks happy. */ |
| spin_lock_irqsave(&dev_priv->irq_lock, irqflags); |
| if (dev_priv->display.hpd_irq_setup) |
| 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); |
| } |