/* 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. * */ #include #include #include "drmP.h" #include "drm.h" #include "i915_drm.h" #include "i915_drv.h" #include "i915_trace.h" #include "intel_drv.h" #define MAX_NOPID ((u32)~0) /** * Interrupts that are always left unmasked. * * Since pipe events are edge-triggered from the PIPESTAT register to IIR, * we leave them always unmasked in IMR and then control enabling them through * PIPESTAT alone. */ #define I915_INTERRUPT_ENABLE_FIX \ (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) /** Interrupts that we mask and unmask at runtime. */ #define I915_INTERRUPT_ENABLE_VAR (I915_USER_INTERRUPT | I915_BSD_USER_INTERRUPT) #define I915_PIPE_VBLANK_STATUS (PIPE_START_VBLANK_INTERRUPT_STATUS |\ PIPE_VBLANK_INTERRUPT_STATUS) #define I915_PIPE_VBLANK_ENABLE (PIPE_START_VBLANK_INTERRUPT_ENABLE |\ PIPE_VBLANK_INTERRUPT_ENABLE) #define DRM_I915_VBLANK_PIPE_ALL (DRM_I915_VBLANK_PIPE_A | \ DRM_I915_VBLANK_PIPE_B) void ironlake_enable_graphics_irq(drm_i915_private_t *dev_priv, u32 mask) { if ((dev_priv->gt_irq_mask_reg & mask) != 0) { dev_priv->gt_irq_mask_reg &= ~mask; I915_WRITE(GTIMR, dev_priv->gt_irq_mask_reg); (void) I915_READ(GTIMR); } } void ironlake_disable_graphics_irq(drm_i915_private_t *dev_priv, u32 mask) { if ((dev_priv->gt_irq_mask_reg & mask) != mask) { dev_priv->gt_irq_mask_reg |= mask; I915_WRITE(GTIMR, dev_priv->gt_irq_mask_reg); (void) I915_READ(GTIMR); } } /* For display hotplug interrupt */ void ironlake_enable_display_irq(drm_i915_private_t *dev_priv, u32 mask) { if ((dev_priv->irq_mask_reg & mask) != 0) { dev_priv->irq_mask_reg &= ~mask; I915_WRITE(DEIMR, dev_priv->irq_mask_reg); (void) I915_READ(DEIMR); } } static inline void ironlake_disable_display_irq(drm_i915_private_t *dev_priv, u32 mask) { if ((dev_priv->irq_mask_reg & mask) != mask) { dev_priv->irq_mask_reg |= mask; I915_WRITE(DEIMR, dev_priv->irq_mask_reg); (void) I915_READ(DEIMR); } } void i915_enable_irq(drm_i915_private_t *dev_priv, u32 mask) { if ((dev_priv->irq_mask_reg & mask) != 0) { dev_priv->irq_mask_reg &= ~mask; I915_WRITE(IMR, dev_priv->irq_mask_reg); (void) I915_READ(IMR); } } void i915_disable_irq(drm_i915_private_t *dev_priv, u32 mask) { if ((dev_priv->irq_mask_reg & mask) != mask) { dev_priv->irq_mask_reg |= mask; I915_WRITE(IMR, dev_priv->irq_mask_reg); (void) I915_READ(IMR); } } static inline u32 i915_pipestat(int pipe) { if (pipe == 0) return PIPEASTAT; if (pipe == 1) return PIPEBSTAT; BUG(); } void i915_enable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask) { if ((dev_priv->pipestat[pipe] & mask) != mask) { u32 reg = i915_pipestat(pipe); dev_priv->pipestat[pipe] |= mask; /* Enable the interrupt, clear any pending status */ I915_WRITE(reg, dev_priv->pipestat[pipe] | (mask >> 16)); (void) I915_READ(reg); } } void i915_disable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask) { if ((dev_priv->pipestat[pipe] & mask) != 0) { u32 reg = i915_pipestat(pipe); dev_priv->pipestat[pipe] &= ~mask; I915_WRITE(reg, dev_priv->pipestat[pipe]); (void) I915_READ(reg); } } /** * intel_enable_asle - enable ASLE interrupt for OpRegion */ void intel_enable_asle (struct drm_device *dev) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; if (HAS_PCH_SPLIT(dev)) ironlake_enable_display_irq(dev_priv, DE_GSE); else { i915_enable_pipestat(dev_priv, 1, I915_LEGACY_BLC_EVENT_ENABLE); if (IS_I965G(dev)) i915_enable_pipestat(dev_priv, 0, I915_LEGACY_BLC_EVENT_ENABLE); } } /** * 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; unsigned long pipeconf = pipe ? PIPEBCONF : PIPEACONF; if (I915_READ(pipeconf) & PIPEACONF_ENABLE) return 1; return 0; } /* Called from drm generic code, passed a 'crtc', which * we use as a pipe index */ 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, count; high_frame = pipe ? PIPEBFRAMEHIGH : PIPEAFRAMEHIGH; low_frame = pipe ? PIPEBFRAMEPIXEL : PIPEAFRAMEPIXEL; if (!i915_pipe_enabled(dev, pipe)) { DRM_DEBUG_DRIVER("trying to get vblank count for disabled " "pipe %d\n", pipe); return 0; } /* * 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) >> PIPE_FRAME_HIGH_SHIFT); low = ((I915_READ(low_frame) & PIPE_FRAME_LOW_MASK) >> PIPE_FRAME_LOW_SHIFT); high2 = ((I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK) >> PIPE_FRAME_HIGH_SHIFT); } while (high1 != high2); count = (high1 << 8) | low; return count; } 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 ? PIPEB_FRMCOUNT_GM45 : PIPEA_FRMCOUNT_GM45; if (!i915_pipe_enabled(dev, pipe)) { DRM_DEBUG_DRIVER("trying to get vblank count for disabled " "pipe %d\n", pipe); return 0; } return I915_READ(reg); } /* * Handle hotplug events outside the interrupt handler proper. */ 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 drm_encoder *encoder; if (mode_config->num_encoder) { list_for_each_entry(encoder, &mode_config->encoder_list, head) { struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder); if (intel_encoder->hot_plug) (*intel_encoder->hot_plug) (intel_encoder); } } /* Just fire off a uevent and let userspace tell us what to do */ drm_helper_hpd_irq_event(dev); } static void i915_handle_rps_change(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 = dev_priv->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->cur_delay != dev_priv->max_delay) new_delay = dev_priv->cur_delay - 1; if (new_delay < dev_priv->max_delay) new_delay = dev_priv->max_delay; } else if (busy_down < min_avg) { if (dev_priv->cur_delay != dev_priv->min_delay) new_delay = dev_priv->cur_delay + 1; if (new_delay > dev_priv->min_delay) new_delay = dev_priv->min_delay; } if (ironlake_set_drps(dev, new_delay)) dev_priv->cur_delay = new_delay; return; } irqreturn_t ironlake_irq_handler(struct drm_device *dev) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; int ret = IRQ_NONE; u32 de_iir, gt_iir, de_ier, pch_iir; struct drm_i915_master_private *master_priv; struct intel_ring_buffer *render_ring = &dev_priv->render_ring; /* disable master interrupt before clearing iir */ de_ier = I915_READ(DEIER); I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL); (void)I915_READ(DEIER); de_iir = I915_READ(DEIIR); gt_iir = I915_READ(GTIIR); pch_iir = I915_READ(SDEIIR); if (de_iir == 0 && gt_iir == 0 && pch_iir == 0) goto done; ret = IRQ_HANDLED; if (dev->primary->master) { master_priv = dev->primary->master->driver_priv; if (master_priv->sarea_priv) master_priv->sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv); } if (gt_iir & GT_PIPE_NOTIFY) { u32 seqno = render_ring->get_gem_seqno(dev, render_ring); render_ring->irq_gem_seqno = seqno; trace_i915_gem_request_complete(dev, seqno); DRM_WAKEUP(&dev_priv->render_ring.irq_queue); dev_priv->hangcheck_count = 0; mod_timer(&dev_priv->hangcheck_timer, jiffies + DRM_I915_HANGCHECK_PERIOD); } if (gt_iir & GT_BSD_USER_INTERRUPT) DRM_WAKEUP(&dev_priv->bsd_ring.irq_queue); if (de_iir & DE_GSE) ironlake_opregion_gse_intr(dev); if (de_iir & DE_PLANEA_FLIP_DONE) { intel_prepare_page_flip(dev, 0); intel_finish_page_flip(dev, 0); } if (de_iir & DE_PLANEB_FLIP_DONE) { intel_prepare_page_flip(dev, 1); intel_finish_page_flip(dev, 1); } if (de_iir & DE_PIPEA_VBLANK) drm_handle_vblank(dev, 0); if (de_iir & DE_PIPEB_VBLANK) drm_handle_vblank(dev, 1); /* check event from PCH */ if ((de_iir & DE_PCH_EVENT) && (pch_iir & SDE_HOTPLUG_MASK)) { queue_work(dev_priv->wq, &dev_priv->hotplug_work); } if (de_iir & DE_PCU_EVENT) { I915_WRITE16(MEMINTRSTS, I915_READ(MEMINTRSTS)); i915_handle_rps_change(dev); } /* should clear PCH hotplug event before clear CPU irq */ I915_WRITE(SDEIIR, pch_iir); I915_WRITE(GTIIR, gt_iir); I915_WRITE(DEIIR, de_iir); done: I915_WRITE(DEIER, de_ier); (void)I915_READ(DEIER); return ret; } /** * 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) { drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t, error_work); struct drm_device *dev = dev_priv->dev; char *error_event[] = { "ERROR=1", NULL }; char *reset_event[] = { "RESET=1", NULL }; char *reset_done_event[] = { "ERROR=0", NULL }; DRM_DEBUG_DRIVER("generating error event\n"); kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, error_event); if (atomic_read(&dev_priv->mm.wedged)) { if (IS_I965G(dev)) { DRM_DEBUG_DRIVER("resetting chip\n"); kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, reset_event); if (!i965_reset(dev, GDRST_RENDER)) { atomic_set(&dev_priv->mm.wedged, 0); kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, reset_done_event); } } else { DRM_DEBUG_DRIVER("reboot required\n"); } } } static struct drm_i915_error_object * i915_error_object_create(struct drm_device *dev, struct drm_gem_object *src) { struct drm_i915_error_object *dst; struct drm_i915_gem_object *src_priv; int page, page_count; if (src == NULL) return NULL; src_priv = to_intel_bo(src); if (src_priv->pages == NULL) return NULL; page_count = src->size / PAGE_SIZE; dst = kmalloc(sizeof(*dst) + page_count * sizeof (u32 *), GFP_ATOMIC); if (dst == NULL) return NULL; for (page = 0; page < page_count; page++) { void *s, *d = kmalloc(PAGE_SIZE, GFP_ATOMIC); unsigned long flags; if (d == NULL) goto unwind; local_irq_save(flags); s = kmap_atomic(src_priv->pages[page], KM_IRQ0); memcpy(d, s, PAGE_SIZE); kunmap_atomic(s, KM_IRQ0); local_irq_restore(flags); dst->pages[page] = d; } dst->page_count = page_count; dst->gtt_offset = src_priv->gtt_offset; return dst; unwind: while (page--) kfree(dst->pages[page]); kfree(dst); return NULL; } static void i915_error_object_free(struct drm_i915_error_object *obj) { int page; if (obj == NULL) return; for (page = 0; page < obj->page_count; page++) kfree(obj->pages[page]); kfree(obj); } static void i915_error_state_free(struct drm_device *dev, struct drm_i915_error_state *error) { i915_error_object_free(error->batchbuffer[0]); i915_error_object_free(error->batchbuffer[1]); i915_error_object_free(error->ringbuffer); kfree(error->active_bo); kfree(error); } static u32 i915_get_bbaddr(struct drm_device *dev, u32 *ring) { u32 cmd; if (IS_I830(dev) || IS_845G(dev)) cmd = MI_BATCH_BUFFER; else if (IS_I965G(dev)) cmd = (MI_BATCH_BUFFER_START | (2 << 6) | MI_BATCH_NON_SECURE_I965); else cmd = (MI_BATCH_BUFFER_START | (2 << 6)); return ring[0] == cmd ? ring[1] : 0; } static u32 i915_ringbuffer_last_batch(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; u32 head, bbaddr; u32 *ring; /* Locate the current position in the ringbuffer and walk back * to find the most recently dispatched batch buffer. */ bbaddr = 0; head = I915_READ(PRB0_HEAD) & HEAD_ADDR; ring = (u32 *)(dev_priv->render_ring.virtual_start + head); while (--ring >= (u32 *)dev_priv->render_ring.virtual_start) { bbaddr = i915_get_bbaddr(dev, ring); if (bbaddr) break; } if (bbaddr == 0) { ring = (u32 *)(dev_priv->render_ring.virtual_start + dev_priv->render_ring.size); while (--ring >= (u32 *)dev_priv->render_ring.virtual_start) { bbaddr = i915_get_bbaddr(dev, ring); if (bbaddr) break; } } return bbaddr; } /** * i915_capture_error_state - capture an error record for later analysis * @dev: drm device * * Should be called when an error is detected (either a hang or an error * interrupt) to capture error state from the time of the error. Fills * out a structure which becomes available in debugfs for user level tools * to pick up. */ static void i915_capture_error_state(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; struct drm_i915_gem_object *obj_priv; struct drm_i915_error_state *error; struct drm_gem_object *batchbuffer[2]; unsigned long flags; u32 bbaddr; int count; spin_lock_irqsave(&dev_priv->error_lock, flags); error = dev_priv->first_error; spin_unlock_irqrestore(&dev_priv->error_lock, flags); if (error) return; error = kmalloc(sizeof(*error), GFP_ATOMIC); if (!error) { DRM_DEBUG_DRIVER("out of memory, not capturing error state\n"); return; } error->seqno = i915_get_gem_seqno(dev, &dev_priv->render_ring); error->eir = I915_READ(EIR); error->pgtbl_er = I915_READ(PGTBL_ER); error->pipeastat = I915_READ(PIPEASTAT); error->pipebstat = I915_READ(PIPEBSTAT); error->instpm = I915_READ(INSTPM); if (!IS_I965G(dev)) { error->ipeir = I915_READ(IPEIR); error->ipehr = I915_READ(IPEHR); error->instdone = I915_READ(INSTDONE); error->acthd = I915_READ(ACTHD); error->bbaddr = 0; } else { error->ipeir = I915_READ(IPEIR_I965); error->ipehr = I915_READ(IPEHR_I965); error->instdone = I915_READ(INSTDONE_I965); error->instps = I915_READ(INSTPS); error->instdone1 = I915_READ(INSTDONE1); error->acthd = I915_READ(ACTHD_I965); error->bbaddr = I915_READ64(BB_ADDR); } bbaddr = i915_ringbuffer_last_batch(dev); /* Grab the current batchbuffer, most likely to have crashed. */ batchbuffer[0] = NULL; batchbuffer[1] = NULL; count = 0; list_for_each_entry(obj_priv, &dev_priv->render_ring.active_list, list) { struct drm_gem_object *obj = &obj_priv->base; if (batchbuffer[0] == NULL && bbaddr >= obj_priv->gtt_offset && bbaddr < obj_priv->gtt_offset + obj->size) batchbuffer[0] = obj; if (batchbuffer[1] == NULL && error->acthd >= obj_priv->gtt_offset && error->acthd < obj_priv->gtt_offset + obj->size && batchbuffer[0] != obj) batchbuffer[1] = obj; count++; } /* We need to copy these to an anonymous buffer as the simplest * method to avoid being overwritten by userpace. */ error->batchbuffer[0] = i915_error_object_create(dev, batchbuffer[0]); error->batchbuffer[1] = i915_error_object_create(dev, batchbuffer[1]); /* Record the ringbuffer */ error->ringbuffer = i915_error_object_create(dev, dev_priv->render_ring.gem_object); /* Record buffers on the active list. */ error->active_bo = NULL; error->active_bo_count = 0; if (count) error->active_bo = kmalloc(sizeof(*error->active_bo)*count, GFP_ATOMIC); if (error->active_bo) { int i = 0; list_for_each_entry(obj_priv, &dev_priv->render_ring.active_list, list) { struct drm_gem_object *obj = &obj_priv->base; error->active_bo[i].size = obj->size; error->active_bo[i].name = obj->name; error->active_bo[i].seqno = obj_priv->last_rendering_seqno; error->active_bo[i].gtt_offset = obj_priv->gtt_offset; error->active_bo[i].read_domains = obj->read_domains; error->active_bo[i].write_domain = obj->write_domain; error->active_bo[i].fence_reg = obj_priv->fence_reg; error->active_bo[i].pinned = 0; if (obj_priv->pin_count > 0) error->active_bo[i].pinned = 1; if (obj_priv->user_pin_count > 0) error->active_bo[i].pinned = -1; error->active_bo[i].tiling = obj_priv->tiling_mode; error->active_bo[i].dirty = obj_priv->dirty; error->active_bo[i].purgeable = obj_priv->madv != I915_MADV_WILLNEED; if (++i == count) break; } error->active_bo_count = i; } do_gettimeofday(&error->time); spin_lock_irqsave(&dev_priv->error_lock, flags); if (dev_priv->first_error == NULL) { dev_priv->first_error = error; error = NULL; } spin_unlock_irqrestore(&dev_priv->error_lock, flags); if (error) i915_error_state_free(dev, error); } void i915_destroy_error_state(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; struct drm_i915_error_state *error; spin_lock(&dev_priv->error_lock); error = dev_priv->first_error; dev_priv->first_error = NULL; spin_unlock(&dev_priv->error_lock); if (error) i915_error_state_free(dev, error); } static void i915_report_and_clear_eir(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; u32 eir = I915_READ(EIR); if (!eir) return; printk(KERN_ERR "render error detected, EIR: 0x%08x\n", eir); if (IS_G4X(dev)) { if (eir & (GM45_ERROR_MEM_PRIV | GM45_ERROR_CP_PRIV)) { u32 ipeir = I915_READ(IPEIR_I965); printk(KERN_ERR " IPEIR: 0x%08x\n", I915_READ(IPEIR_I965)); printk(KERN_ERR " IPEHR: 0x%08x\n", I915_READ(IPEHR_I965)); printk(KERN_ERR " INSTDONE: 0x%08x\n", I915_READ(INSTDONE_I965)); printk(KERN_ERR " INSTPS: 0x%08x\n", I915_READ(INSTPS)); printk(KERN_ERR " INSTDONE1: 0x%08x\n", I915_READ(INSTDONE1)); printk(KERN_ERR " ACTHD: 0x%08x\n", I915_READ(ACTHD_I965)); I915_WRITE(IPEIR_I965, ipeir); (void)I915_READ(IPEIR_I965); } if (eir & GM45_ERROR_PAGE_TABLE) { u32 pgtbl_err = I915_READ(PGTBL_ER); printk(KERN_ERR "page table error\n"); printk(KERN_ERR " PGTBL_ER: 0x%08x\n", pgtbl_err); I915_WRITE(PGTBL_ER, pgtbl_err); (void)I915_READ(PGTBL_ER); } } if (IS_I9XX(dev)) { if (eir & I915_ERROR_PAGE_TABLE) { u32 pgtbl_err = I915_READ(PGTBL_ER); printk(KERN_ERR "page table error\n"); printk(KERN_ERR " PGTBL_ER: 0x%08x\n", pgtbl_err); I915_WRITE(PGTBL_ER, pgtbl_err); (void)I915_READ(PGTBL_ER); } } if (eir & I915_ERROR_MEMORY_REFRESH) { u32 pipea_stats = I915_READ(PIPEASTAT); u32 pipeb_stats = I915_READ(PIPEBSTAT); printk(KERN_ERR "memory refresh error\n"); printk(KERN_ERR "PIPEASTAT: 0x%08x\n", pipea_stats); printk(KERN_ERR "PIPEBSTAT: 0x%08x\n", pipeb_stats); /* pipestat has already been acked */ } if (eir & I915_ERROR_INSTRUCTION) { printk(KERN_ERR "instruction error\n"); printk(KERN_ERR " INSTPM: 0x%08x\n", I915_READ(INSTPM)); if (!IS_I965G(dev)) { u32 ipeir = I915_READ(IPEIR); printk(KERN_ERR " IPEIR: 0x%08x\n", I915_READ(IPEIR)); printk(KERN_ERR " IPEHR: 0x%08x\n", I915_READ(IPEHR)); printk(KERN_ERR " INSTDONE: 0x%08x\n", I915_READ(INSTDONE)); printk(KERN_ERR " ACTHD: 0x%08x\n", I915_READ(ACTHD)); I915_WRITE(IPEIR, ipeir); (void)I915_READ(IPEIR); } else { u32 ipeir = I915_READ(IPEIR_I965); printk(KERN_ERR " IPEIR: 0x%08x\n", I915_READ(IPEIR_I965)); printk(KERN_ERR " IPEHR: 0x%08x\n", I915_READ(IPEHR_I965)); printk(KERN_ERR " INSTDONE: 0x%08x\n", I915_READ(INSTDONE_I965)); printk(KERN_ERR " INSTPS: 0x%08x\n", I915_READ(INSTPS)); printk(KERN_ERR " INSTDONE1: 0x%08x\n", I915_READ(INSTDONE1)); printk(KERN_ERR " ACTHD: 0x%08x\n", I915_READ(ACTHD_I965)); I915_WRITE(IPEIR_I965, ipeir); (void)I915_READ(IPEIR_I965); } } I915_WRITE(EIR, eir); (void)I915_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.). */ static 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(&dev_priv->mm.wedged, 1); /* * Wakeup waiting processes so they don't hang */ DRM_WAKEUP(&dev_priv->render_ring.irq_queue); } queue_work(dev_priv->wq, &dev_priv->error_work); } irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS) { struct drm_device *dev = (struct drm_device *) arg; drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; struct drm_i915_master_private *master_priv; u32 iir, new_iir; u32 pipea_stats, pipeb_stats; u32 vblank_status; u32 vblank_enable; int vblank = 0; unsigned long irqflags; int irq_received; int ret = IRQ_NONE; struct intel_ring_buffer *render_ring = &dev_priv->render_ring; atomic_inc(&dev_priv->irq_received); if (HAS_PCH_SPLIT(dev)) return ironlake_irq_handler(dev); iir = I915_READ(IIR); if (IS_I965G(dev)) { vblank_status = I915_START_VBLANK_INTERRUPT_STATUS; vblank_enable = PIPE_START_VBLANK_INTERRUPT_ENABLE; } else { vblank_status = I915_VBLANK_INTERRUPT_STATUS; vblank_enable = I915_VBLANK_INTERRUPT_ENABLE; } for (;;) { irq_received = iir != 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->user_irq_lock, irqflags); pipea_stats = I915_READ(PIPEASTAT); pipeb_stats = I915_READ(PIPEBSTAT); if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT) i915_handle_error(dev, false); /* * Clear the PIPE(A|B)STAT regs before the IIR */ if (pipea_stats & 0x8000ffff) { if (pipea_stats & PIPE_FIFO_UNDERRUN_STATUS) DRM_DEBUG_DRIVER("pipe a underrun\n"); I915_WRITE(PIPEASTAT, pipea_stats); irq_received = 1; } if (pipeb_stats & 0x8000ffff) { if (pipeb_stats & PIPE_FIFO_UNDERRUN_STATUS) DRM_DEBUG_DRIVER("pipe b underrun\n"); I915_WRITE(PIPEBSTAT, pipeb_stats); irq_received = 1; } spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags); if (!irq_received) break; ret = IRQ_HANDLED; /* 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); DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n", hotplug_status); if (hotplug_status & dev_priv->hotplug_supported_mask) queue_work(dev_priv->wq, &dev_priv->hotplug_work); I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status); I915_READ(PORT_HOTPLUG_STAT); } I915_WRITE(IIR, iir); new_iir = I915_READ(IIR); /* Flush posted writes */ if (dev->primary->master) { master_priv = dev->primary->master->driver_priv; if (master_priv->sarea_priv) master_priv->sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv); } if (iir & I915_USER_INTERRUPT) { u32 seqno = render_ring->get_gem_seqno(dev, render_ring); render_ring->irq_gem_seqno = seqno; trace_i915_gem_request_complete(dev, seqno); DRM_WAKEUP(&dev_priv->render_ring.irq_queue); dev_priv->hangcheck_count = 0; mod_timer(&dev_priv->hangcheck_timer, jiffies + DRM_I915_HANGCHECK_PERIOD); } if (HAS_BSD(dev) && (iir & I915_BSD_USER_INTERRUPT)) DRM_WAKEUP(&dev_priv->bsd_ring.irq_queue); if (iir & I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT) intel_prepare_page_flip(dev, 0); if (iir & I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT) intel_prepare_page_flip(dev, 1); if (pipea_stats & vblank_status) { vblank++; drm_handle_vblank(dev, 0); intel_finish_page_flip(dev, 0); } if (pipeb_stats & vblank_status) { vblank++; drm_handle_vblank(dev, 1); intel_finish_page_flip(dev, 1); } if ((pipea_stats & I915_LEGACY_BLC_EVENT_STATUS) || (pipeb_stats & I915_LEGACY_BLC_EVENT_STATUS) || (iir & I915_ASLE_INTERRUPT)) 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. */ iir = new_iir; } return ret; } static int i915_emit_irq(struct drm_device * dev) { drm_i915_private_t *dev_priv = dev->dev_private; struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv; i915_kernel_lost_context(dev); DRM_DEBUG_DRIVER("\n"); dev_priv->counter++; if (dev_priv->counter > 0x7FFFFFFFUL) dev_priv->counter = 1; if (master_priv->sarea_priv) master_priv->sarea_priv->last_enqueue = dev_priv->counter; BEGIN_LP_RING(4); OUT_RING(MI_STORE_DWORD_INDEX); OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT); OUT_RING(dev_priv->counter); OUT_RING(MI_USER_INTERRUPT); ADVANCE_LP_RING(); return dev_priv->counter; } void i915_trace_irq_get(struct drm_device *dev, u32 seqno) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; struct intel_ring_buffer *render_ring = &dev_priv->render_ring; if (dev_priv->trace_irq_seqno == 0) render_ring->user_irq_get(dev, render_ring); dev_priv->trace_irq_seqno = seqno; } static int i915_wait_irq(struct drm_device * dev, int irq_nr) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv; int ret = 0; struct intel_ring_buffer *render_ring = &dev_priv->render_ring; DRM_DEBUG_DRIVER("irq_nr=%d breadcrumb=%d\n", irq_nr, READ_BREADCRUMB(dev_priv)); if (READ_BREADCRUMB(dev_priv) >= irq_nr) { if (master_priv->sarea_priv) master_priv->sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv); return 0; } if (master_priv->sarea_priv) master_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT; render_ring->user_irq_get(dev, render_ring); DRM_WAIT_ON(ret, dev_priv->render_ring.irq_queue, 3 * DRM_HZ, READ_BREADCRUMB(dev_priv) >= irq_nr); render_ring->user_irq_put(dev, render_ring); if (ret == -EBUSY) { DRM_ERROR("EBUSY -- rec: %d emitted: %d\n", READ_BREADCRUMB(dev_priv), (int)dev_priv->counter); } return ret; } /* Needs the lock as it touches the ring. */ int i915_irq_emit(struct drm_device *dev, void *data, struct drm_file *file_priv) { drm_i915_private_t *dev_priv = dev->dev_private; drm_i915_irq_emit_t *emit = data; int result; if (!dev_priv || !dev_priv->render_ring.virtual_start) { DRM_ERROR("called with no initialization\n"); return -EINVAL; } RING_LOCK_TEST_WITH_RETURN(dev, file_priv); mutex_lock(&dev->struct_mutex); result = i915_emit_irq(dev); mutex_unlock(&dev->struct_mutex); if (DRM_COPY_TO_USER(emit->irq_seq, &result, sizeof(int))) { DRM_ERROR("copy_to_user\n"); return -EFAULT; } return 0; } /* Doesn't need the hardware lock. */ int i915_irq_wait(struct drm_device *dev, void *data, struct drm_file *file_priv) { drm_i915_private_t *dev_priv = dev->dev_private; drm_i915_irq_wait_t *irqwait = data; if (!dev_priv) { DRM_ERROR("called with no initialization\n"); return -EINVAL; } return i915_wait_irq(dev, irqwait->irq_seq); } /* Called from drm generic code, passed 'crtc' which * we use as a pipe index */ 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; int pipeconf_reg = (pipe == 0) ? PIPEACONF : PIPEBCONF; u32 pipeconf; pipeconf = I915_READ(pipeconf_reg); if (!(pipeconf & PIPEACONF_ENABLE)) return -EINVAL; spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags); if (HAS_PCH_SPLIT(dev)) ironlake_enable_display_irq(dev_priv, (pipe == 0) ? DE_PIPEA_VBLANK: DE_PIPEB_VBLANK); else if (IS_I965G(dev)) i915_enable_pipestat(dev_priv, pipe, PIPE_START_VBLANK_INTERRUPT_ENABLE); else i915_enable_pipestat(dev_priv, pipe, PIPE_VBLANK_INTERRUPT_ENABLE); spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags); return 0; } /* Called from drm generic code, passed 'crtc' which * we use as a pipe index */ 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->user_irq_lock, irqflags); if (HAS_PCH_SPLIT(dev)) ironlake_disable_display_irq(dev_priv, (pipe == 0) ? DE_PIPEA_VBLANK: DE_PIPEB_VBLANK); else i915_disable_pipestat(dev_priv, pipe, PIPE_VBLANK_INTERRUPT_ENABLE | PIPE_START_VBLANK_INTERRUPT_ENABLE); spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags); } void i915_enable_interrupt (struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; if (!HAS_PCH_SPLIT(dev)) opregion_enable_asle(dev); dev_priv->irq_enabled = 1; } /* Set the vblank monitor pipe */ int i915_vblank_pipe_set(struct drm_device *dev, void *data, struct drm_file *file_priv) { drm_i915_private_t *dev_priv = dev->dev_private; if (!dev_priv) { DRM_ERROR("called with no initialization\n"); return -EINVAL; } return 0; } int i915_vblank_pipe_get(struct drm_device *dev, void *data, struct drm_file *file_priv) { drm_i915_private_t *dev_priv = dev->dev_private; drm_i915_vblank_pipe_t *pipe = data; if (!dev_priv) { DRM_ERROR("called with no initialization\n"); return -EINVAL; } pipe->pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B; return 0; } /** * Schedule buffer swap at given vertical blank. */ int i915_vblank_swap(struct drm_device *dev, void *data, struct drm_file *file_priv) { /* The delayed swap mechanism was fundamentally racy, and has been * removed. The model was that the client requested a delayed flip/swap * from the kernel, then waited for vblank before continuing to perform * rendering. The problem was that the kernel might wake the client * up before it dispatched the vblank swap (since the lock has to be * held while touching the ringbuffer), in which case the client would * clear and start the next frame before the swap occurred, and * flicker would occur in addition to likely missing the vblank. * * In the absence of this ioctl, userland falls back to a correct path * of waiting for a vblank, then dispatching the swap on its own. * Context switching to userland and back is plenty fast enough for * meeting the requirements of vblank swapping. */ return -EINVAL; } struct drm_i915_gem_request * i915_get_tail_request(struct drm_device *dev) { drm_i915_private_t *dev_priv = dev->dev_private; return list_entry(dev_priv->render_ring.request_list.prev, struct drm_i915_gem_request, list); } /** * This is called when the chip hasn't reported back with completed * batchbuffers in a long time. The first time this is called we simply record * ACTHD. If ACTHD hasn't changed by the time the hangcheck timer elapses * again, we assume the chip is wedged and try to fix it. */ void i915_hangcheck_elapsed(unsigned long data) { struct drm_device *dev = (struct drm_device *)data; drm_i915_private_t *dev_priv = dev->dev_private; uint32_t acthd; /* No reset support on this chip yet. */ if (IS_GEN6(dev)) return; if (!IS_I965G(dev)) acthd = I915_READ(ACTHD); else acthd = I915_READ(ACTHD_I965); /* If all work is done then ACTHD clearly hasn't advanced. */ if (list_empty(&dev_priv->render_ring.request_list) || i915_seqno_passed(i915_get_gem_seqno(dev, &dev_priv->render_ring), i915_get_tail_request(dev)->seqno)) { dev_priv->hangcheck_count = 0; return; } if (dev_priv->last_acthd == acthd && dev_priv->hangcheck_count > 0) { DRM_ERROR("Hangcheck timer elapsed... GPU hung\n"); i915_handle_error(dev, true); return; } /* Reset timer case chip hangs without another request being added */ mod_timer(&dev_priv->hangcheck_timer, jiffies + DRM_I915_HANGCHECK_PERIOD); if (acthd != dev_priv->last_acthd) dev_priv->hangcheck_count = 0; else dev_priv->hangcheck_count++; dev_priv->last_acthd = acthd; } /* 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; I915_WRITE(HWSTAM, 0xeffe); /* XXX hotplug from PCH */ I915_WRITE(DEIMR, 0xffffffff); I915_WRITE(DEIER, 0x0); (void) I915_READ(DEIER); /* and GT */ I915_WRITE(GTIMR, 0xffffffff); I915_WRITE(GTIER, 0x0); (void) I915_READ(GTIER); /* south display irq */ I915_WRITE(SDEIMR, 0xffffffff); I915_WRITE(SDEIER, 0x0); (void) I915_READ(SDEIER); } static int ironlake_irq_postinstall(struct drm_device *dev) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; /* enable kind of interrupts always enabled */ u32 display_mask = DE_MASTER_IRQ_CONTROL | DE_GSE | DE_PCH_EVENT | DE_PLANEA_FLIP_DONE | DE_PLANEB_FLIP_DONE; u32 render_mask = GT_PIPE_NOTIFY | GT_BSD_USER_INTERRUPT; u32 hotplug_mask = SDE_CRT_HOTPLUG | SDE_PORTB_HOTPLUG | SDE_PORTC_HOTPLUG | SDE_PORTD_HOTPLUG; dev_priv->irq_mask_reg = ~display_mask; dev_priv->de_irq_enable_reg = display_mask | DE_PIPEA_VBLANK | DE_PIPEB_VBLANK; /* should always can generate irq */ I915_WRITE(DEIIR, I915_READ(DEIIR)); I915_WRITE(DEIMR, dev_priv->irq_mask_reg); I915_WRITE(DEIER, dev_priv->de_irq_enable_reg); (void) I915_READ(DEIER); /* user interrupt should be enabled, but masked initial */ dev_priv->gt_irq_mask_reg = ~render_mask; dev_priv->gt_irq_enable_reg = render_mask; I915_WRITE(GTIIR, I915_READ(GTIIR)); I915_WRITE(GTIMR, dev_priv->gt_irq_mask_reg); I915_WRITE(GTIER, dev_priv->gt_irq_enable_reg); (void) I915_READ(GTIER); dev_priv->pch_irq_mask_reg = ~hotplug_mask; dev_priv->pch_irq_enable_reg = hotplug_mask; I915_WRITE(SDEIIR, I915_READ(SDEIIR)); I915_WRITE(SDEIMR, dev_priv->pch_irq_mask_reg); I915_WRITE(SDEIER, dev_priv->pch_irq_enable_reg); (void) I915_READ(SDEIER); if (IS_IRONLAKE_M(dev)) { /* Clear & enable PCU event interrupts */ I915_WRITE(DEIIR, DE_PCU_EVENT); I915_WRITE(DEIER, I915_READ(DEIER) | DE_PCU_EVENT); ironlake_enable_display_irq(dev_priv, DE_PCU_EVENT); } return 0; } void i915_driver_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); INIT_WORK(&dev_priv->hotplug_work, i915_hotplug_work_func); INIT_WORK(&dev_priv->error_work, i915_error_work_func); if (HAS_PCH_SPLIT(dev)) { ironlake_irq_preinstall(dev); return; } if (I915_HAS_HOTPLUG(dev)) { I915_WRITE(PORT_HOTPLUG_EN, 0); I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT)); } I915_WRITE(HWSTAM, 0xeffe); I915_WRITE(PIPEASTAT, 0); I915_WRITE(PIPEBSTAT, 0); I915_WRITE(IMR, 0xffffffff); I915_WRITE(IER, 0x0); (void) I915_READ(IER); } /* * Must be called after intel_modeset_init or hotplug interrupts won't be * enabled correctly. */ int i915_driver_irq_postinstall(struct drm_device *dev) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; u32 enable_mask = I915_INTERRUPT_ENABLE_FIX | I915_INTERRUPT_ENABLE_VAR; u32 error_mask; DRM_INIT_WAITQUEUE(&dev_priv->render_ring.irq_queue); if (HAS_BSD(dev)) DRM_INIT_WAITQUEUE(&dev_priv->bsd_ring.irq_queue); dev_priv->vblank_pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B; if (HAS_PCH_SPLIT(dev)) return ironlake_irq_postinstall(dev); /* Unmask the interrupts that we always want on. */ dev_priv->irq_mask_reg = ~I915_INTERRUPT_ENABLE_FIX; dev_priv->pipestat[0] = 0; dev_priv->pipestat[1] = 0; if (I915_HAS_HOTPLUG(dev)) { /* Enable in IER... */ enable_mask |= I915_DISPLAY_PORT_INTERRUPT; /* and unmask in IMR */ dev_priv->irq_mask_reg &= ~I915_DISPLAY_PORT_INTERRUPT; } /* * 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_reg); I915_WRITE(IER, enable_mask); (void) I915_READ(IER); if (I915_HAS_HOTPLUG(dev)) { u32 hotplug_en = I915_READ(PORT_HOTPLUG_EN); /* Note HDMI and DP share bits */ if (dev_priv->hotplug_supported_mask & HDMIB_HOTPLUG_INT_STATUS) hotplug_en |= HDMIB_HOTPLUG_INT_EN; if (dev_priv->hotplug_supported_mask & HDMIC_HOTPLUG_INT_STATUS) hotplug_en |= HDMIC_HOTPLUG_INT_EN; if (dev_priv->hotplug_supported_mask & HDMID_HOTPLUG_INT_STATUS) hotplug_en |= HDMID_HOTPLUG_INT_EN; if (dev_priv->hotplug_supported_mask & SDVOC_HOTPLUG_INT_STATUS) hotplug_en |= SDVOC_HOTPLUG_INT_EN; if (dev_priv->hotplug_supported_mask & SDVOB_HOTPLUG_INT_STATUS) hotplug_en |= SDVOB_HOTPLUG_INT_EN; if (dev_priv->hotplug_supported_mask & CRT_HOTPLUG_INT_STATUS) hotplug_en |= CRT_HOTPLUG_INT_EN; /* Ignore TV since it's buggy */ I915_WRITE(PORT_HOTPLUG_EN, hotplug_en); } opregion_enable_asle(dev); return 0; } static void ironlake_irq_uninstall(struct drm_device *dev) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; I915_WRITE(HWSTAM, 0xffffffff); I915_WRITE(DEIMR, 0xffffffff); I915_WRITE(DEIER, 0x0); I915_WRITE(DEIIR, I915_READ(DEIIR)); I915_WRITE(GTIMR, 0xffffffff); I915_WRITE(GTIER, 0x0); I915_WRITE(GTIIR, I915_READ(GTIIR)); } void i915_driver_irq_uninstall(struct drm_device * dev) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; if (!dev_priv) return; dev_priv->vblank_pipe = 0; if (HAS_PCH_SPLIT(dev)) { ironlake_irq_uninstall(dev); return; } if (I915_HAS_HOTPLUG(dev)) { I915_WRITE(PORT_HOTPLUG_EN, 0); I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT)); } I915_WRITE(HWSTAM, 0xffffffff); I915_WRITE(PIPEASTAT, 0); I915_WRITE(PIPEBSTAT, 0); I915_WRITE(IMR, 0xffffffff); I915_WRITE(IER, 0x0); I915_WRITE(PIPEASTAT, I915_READ(PIPEASTAT) & 0x8000ffff); I915_WRITE(PIPEBSTAT, I915_READ(PIPEBSTAT) & 0x8000ffff); I915_WRITE(IIR, I915_READ(IIR)); }