Merge branch 'drm-intel-next' of ssh://master.kernel.org/pub/scm/linu…

…x/kernel/git/keithp/linux-2.6 into drm-core-next

* 'drm-intel-next' of ssh://master.kernel.org/pub/scm/linux/kernel/git/keithp/linux-2.6: (52 commits)
  drm/i915: provide module parameter description
  drm/i915: add module parameter compiler hints
  drm/i915/bios: Avoid temporary allocation whilst searching for downclock
  drm/i915: Cache GT fifo count for SandyBridge
  i915: Fix opregion notifications
  drm/i915: TVDAC_STATE_CHG does not indicate successful load-detect
  drm/i915: Select correct pipe during TV detect
  drm/i915/ringbuffer: Idling requires waiting for the ring to be empty
  Revert "drm/i915: enable rc6 by default"
  drm/i915: Clean up i915_driver_load failure path
  drm/i915: Enable i915 frame buffer compression by default
  drm/i915: Share the common work of disabling active FBC before updating
  drm/i915: Perform intel_enable_fbc() from a delayed task
  drm/i915: Disable FBC across page-flipping
  drm/i915: Set persistent-mode for ILK/SNB framebuffer compression
  drm/i915: Use of a CPU fence is mandatory to update FBC regions upon CPU writes
  drm/i915: Remove vestigial pitch from post-gen2 FBC control routines
  drm/i915: Replace direct calls to vfunc.disable_fbc with intel_disable_fbc()
  drm/i915: Only export the generic intel_disable_fbc() interface
  drm/i915: Enable GPU reset on Ivybridge.
  ...

drivers/acpi/video.c

@@ -46,7 +46,6 @@
 
 #define PREFIX "ACPI: "
 
-#define ACPI_VIDEO_CLASS		"video"
 #define ACPI_VIDEO_BUS_NAME		"Video Bus"
 #define ACPI_VIDEO_DEVICE_NAME		"Video Device"
 #define ACPI_VIDEO_NOTIFY_SWITCH	0x80
@@ -1445,7 +1444,8 @@ static void acpi_video_bus_notify(struct acpi_device *device, u32 event)
 	case ACPI_VIDEO_NOTIFY_SWITCH:	/* User requested a switch,
 					 * most likely via hotkey. */
 		acpi_bus_generate_proc_event(device, event, 0);
-		keycode = KEY_SWITCHVIDEOMODE;
+		if (!acpi_notifier_call_chain(device, event, 0))
+			keycode = KEY_SWITCHVIDEOMODE;
 		break;
 
 	case ACPI_VIDEO_NOTIFY_PROBE:	/* User plugged in or removed a video
@@ -1475,7 +1475,8 @@ static void acpi_video_bus_notify(struct acpi_device *device, u32 event)
 		break;
 	}
 
-	acpi_notifier_call_chain(device, event, 0);
+	if (event != ACPI_VIDEO_NOTIFY_SWITCH)
+		acpi_notifier_call_chain(device, event, 0);
 
 	if (keycode) {
 		input_report_key(input, keycode, 1);

drivers/cpufreq/cpufreq.c

@@ -1199,6 +1199,26 @@ unsigned int cpufreq_quick_get(unsigned int cpu)
 }
 EXPORT_SYMBOL(cpufreq_quick_get);
 
+/**
+ * cpufreq_quick_get_max - get the max reported CPU frequency for this CPU
+ * @cpu: CPU number
+ *
+ * Just return the max possible frequency for a given CPU.
+ */
+unsigned int cpufreq_quick_get_max(unsigned int cpu)
+{
+	struct cpufreq_policy *policy = cpufreq_cpu_get(cpu);
+	unsigned int ret_freq = 0;
+
+	if (policy) {
+		ret_freq = policy->max;
+		cpufreq_cpu_put(policy);
+	}
+
+	return ret_freq;
+}
+EXPORT_SYMBOL(cpufreq_quick_get_max);
+
 
 static unsigned int __cpufreq_get(unsigned int cpu)
 {

drivers/gpu/drm/drm_crtc_helper.c

@@ -560,6 +560,11 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set)
 			mode_changed = true;
 		} else if (set->fb == NULL) {
 			mode_changed = true;
+		} else if (set->fb->depth != set->crtc->fb->depth) {
+			mode_changed = true;
+		} else if (set->fb->bits_per_pixel !=
+			   set->crtc->fb->bits_per_pixel) {
+			mode_changed = true;
 		} else
 			fb_changed = true;
 	}

drivers/gpu/drm/i915/i915_debugfs.c

@@ -865,7 +865,7 @@ static int i915_cur_delayinfo(struct seq_file *m, void *unused)
 			   MEMSTAT_VID_SHIFT);
 		seq_printf(m, "Current P-state: %d\n",
 			   (rgvstat & MEMSTAT_PSTATE_MASK) >> MEMSTAT_PSTATE_SHIFT);
-	} else if (IS_GEN6(dev)) {
+	} else if (IS_GEN6(dev) || IS_GEN7(dev)) {
 		u32 gt_perf_status = I915_READ(GEN6_GT_PERF_STATUS);
 		u32 rp_state_limits = I915_READ(GEN6_RP_STATE_LIMITS);
 		u32 rp_state_cap = I915_READ(GEN6_RP_STATE_CAP);
@@ -1123,6 +1123,44 @@ static int i915_emon_status(struct seq_file *m, void *unused)
 	return 0;
 }
 
+static int i915_ring_freq_table(struct seq_file *m, void *unused)
+{
+	struct drm_info_node *node = (struct drm_info_node *) m->private;
+	struct drm_device *dev = node->minor->dev;
+	drm_i915_private_t *dev_priv = dev->dev_private;
+	int ret;
+	int gpu_freq, ia_freq;
+
+	if (!(IS_GEN6(dev) || IS_GEN7(dev))) {
+		seq_printf(m, "unsupported on this chipset\n");
+		return 0;
+	}
+
+	ret = mutex_lock_interruptible(&dev->struct_mutex);
+	if (ret)
+		return ret;
+
+	seq_printf(m, "GPU freq (MHz)\tEffective CPU freq (MHz)\n");
+
+	for (gpu_freq = dev_priv->min_delay; gpu_freq <= dev_priv->max_delay;
+	     gpu_freq++) {
+		I915_WRITE(GEN6_PCODE_DATA, gpu_freq);
+		I915_WRITE(GEN6_PCODE_MAILBOX, GEN6_PCODE_READY |
+			   GEN6_PCODE_READ_MIN_FREQ_TABLE);
+		if (wait_for((I915_READ(GEN6_PCODE_MAILBOX) &
+			      GEN6_PCODE_READY) == 0, 10)) {
+			DRM_ERROR("pcode read of freq table timed out\n");
+			continue;
+		}
+		ia_freq = I915_READ(GEN6_PCODE_DATA);
+		seq_printf(m, "%d\t\t%d\n", gpu_freq * 50, ia_freq * 100);
+	}
+
+	mutex_unlock(&dev->struct_mutex);
+
+	return 0;
+}
+
 static int i915_gfxec(struct seq_file *m, void *unused)
 {
 	struct drm_info_node *node = (struct drm_info_node *) m->private;
@@ -1430,6 +1468,7 @@ static struct drm_info_list i915_debugfs_list[] = {
 	{"i915_inttoext_table", i915_inttoext_table, 0},
 	{"i915_drpc_info", i915_drpc_info, 0},
 	{"i915_emon_status", i915_emon_status, 0},
+	{"i915_ring_freq_table", i915_ring_freq_table, 0},
 	{"i915_gfxec", i915_gfxec, 0},
 	{"i915_fbc_status", i915_fbc_status, 0},
 	{"i915_sr_status", i915_sr_status, 0},

drivers/gpu/drm/i915/i915_dma.c

@@ -1073,6 +1073,9 @@ static void i915_setup_compression(struct drm_device *dev, int size)
 	unsigned long cfb_base;
 	unsigned long ll_base = 0;
 
+	/* Just in case the BIOS is doing something questionable. */
+	intel_disable_fbc(dev);
+
 	compressed_fb = drm_mm_search_free(&dev_priv->mm.stolen, size, 4096, 0);
 	if (compressed_fb)
 		compressed_fb = drm_mm_get_block(compressed_fb, size, 4096);
@@ -1099,7 +1102,6 @@ static void i915_setup_compression(struct drm_device *dev, int size)
 
 	dev_priv->cfb_size = size;
 
-	intel_disable_fbc(dev);
 	dev_priv->compressed_fb = compressed_fb;
 	if (HAS_PCH_SPLIT(dev))
 		I915_WRITE(ILK_DPFC_CB_BASE, compressed_fb->start);
@@ -1943,7 +1945,7 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
 	if (!dev_priv->mm.gtt) {
 		DRM_ERROR("Failed to initialize GTT\n");
 		ret = -ENODEV;
-		goto out_iomapfree;
+		goto out_rmmap;
 	}
 
 	agp_size = dev_priv->mm.gtt->gtt_mappable_entries << PAGE_SHIFT;
@@ -1987,7 +1989,7 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
 	if (dev_priv->wq == NULL) {
 		DRM_ERROR("Failed to create our workqueue.\n");
 		ret = -ENOMEM;
-		goto out_iomapfree;
+		goto out_mtrrfree;
 	}
 
 	/* enable GEM by default */
@@ -2074,13 +2076,21 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
 	return 0;
 
 out_gem_unload:
+	if (dev_priv->mm.inactive_shrinker.shrink)
+		unregister_shrinker(&dev_priv->mm.inactive_shrinker);
+
 	if (dev->pdev->msi_enabled)
 		pci_disable_msi(dev->pdev);
 
 	intel_teardown_gmbus(dev);
 	intel_teardown_mchbar(dev);
 	destroy_workqueue(dev_priv->wq);
-out_iomapfree:
+out_mtrrfree:
+	if (dev_priv->mm.gtt_mtrr >= 0) {
+		mtrr_del(dev_priv->mm.gtt_mtrr, dev->agp->base,
+			 dev->agp->agp_info.aper_size * 1024 * 1024);
+		dev_priv->mm.gtt_mtrr = -1;
+	}
 	io_mapping_free(dev_priv->mm.gtt_mapping);
 out_rmmap:
 	pci_iounmap(dev->pdev, dev_priv->regs);

drivers/gpu/drm/i915/i915_drv.c

@@ -37,38 +37,70 @@
 #include <linux/console.h>
 #include "drm_crtc_helper.h"
 
-static int i915_modeset = -1;
+static int i915_modeset __read_mostly = -1;
 module_param_named(modeset, i915_modeset, int, 0400);
+MODULE_PARM_DESC(modeset,
+		"Use kernel modesetting [KMS] (0=DRM_I915_KMS from .config, "
+		"1=on, -1=force vga console preference [default])");
 
-unsigned int i915_fbpercrtc = 0;
+unsigned int i915_fbpercrtc __always_unused = 0;
 module_param_named(fbpercrtc, i915_fbpercrtc, int, 0400);
 
-int i915_panel_ignore_lid = 0;
+int i915_panel_ignore_lid __read_mostly = 0;
 module_param_named(panel_ignore_lid, i915_panel_ignore_lid, int, 0600);
+MODULE_PARM_DESC(panel_ignore_lid,
+		"Override lid status (0=autodetect [default], 1=lid open, "
+		"-1=lid closed)");
 
-unsigned int i915_powersave = 1;
+unsigned int i915_powersave __read_mostly = 1;
 module_param_named(powersave, i915_powersave, int, 0600);
+MODULE_PARM_DESC(powersave,
+		"Enable powersavings, fbc, downclocking, etc. (default: true)");
 
-unsigned int i915_semaphores = 0;
+unsigned int i915_semaphores __read_mostly = 0;
 module_param_named(semaphores, i915_semaphores, int, 0600);
+MODULE_PARM_DESC(semaphores,
+		"Use semaphores for inter-ring sync (default: false)");
 
-unsigned int i915_enable_rc6 = 1;
+unsigned int i915_enable_rc6 __read_mostly = 0;
 module_param_named(i915_enable_rc6, i915_enable_rc6, int, 0600);
+MODULE_PARM_DESC(i915_enable_rc6,
+		"Enable power-saving render C-state 6 (default: true)");
 
-unsigned int i915_enable_fbc = 0;
+unsigned int i915_enable_fbc __read_mostly = 1;
 module_param_named(i915_enable_fbc, i915_enable_fbc, int, 0600);
+MODULE_PARM_DESC(i915_enable_fbc,
+		"Enable frame buffer compression for power savings "
+		"(default: false)");
 
-unsigned int i915_lvds_downclock = 0;
+unsigned int i915_lvds_downclock __read_mostly = 0;
 module_param_named(lvds_downclock, i915_lvds_downclock, int, 0400);
+MODULE_PARM_DESC(lvds_downclock,
+		"Use panel (LVDS/eDP) downclocking for power savings "
+		"(default: false)");
 
-unsigned int i915_panel_use_ssc = 1;
+unsigned int i915_panel_use_ssc __read_mostly = 1;
 module_param_named(lvds_use_ssc, i915_panel_use_ssc, int, 0600);
+MODULE_PARM_DESC(lvds_use_ssc,
+		"Use Spread Spectrum Clock with panels [LVDS/eDP] "
+		"(default: true)");
 
-int i915_vbt_sdvo_panel_type = -1;
+int i915_vbt_sdvo_panel_type __read_mostly = -1;
 module_param_named(vbt_sdvo_panel_type, i915_vbt_sdvo_panel_type, int, 0600);
+MODULE_PARM_DESC(vbt_sdvo_panel_type,
+		"Override selection of SDVO panel mode in the VBT "
+		"(default: auto)");
 
-static bool i915_try_reset = true;
+static bool i915_try_reset __read_mostly = true;
 module_param_named(reset, i915_try_reset, bool, 0600);
+MODULE_PARM_DESC(reset, "Attempt GPU resets (default: true)");
+
+bool i915_enable_hangcheck __read_mostly = true;
+module_param_named(enable_hangcheck, i915_enable_hangcheck, bool, 0644);
+MODULE_PARM_DESC(enable_hangcheck,
+		"Periodically check GPU activity for detecting hangs. "
+		"WARNING: Disabling this can cause system wide hangs. "
+		"(default: true)");
 
 static struct drm_driver driver;
 extern int intel_agp_enabled;
@@ -345,12 +377,17 @@ void gen6_gt_force_wake_put(struct drm_i915_private *dev_priv)
 
 void __gen6_gt_wait_for_fifo(struct drm_i915_private *dev_priv)
 {
-	int loop = 500;
-	u32 fifo = I915_READ_NOTRACE(GT_FIFO_FREE_ENTRIES);
-	while (fifo < 20 && loop--) {
-		udelay(10);
-		fifo = I915_READ_NOTRACE(GT_FIFO_FREE_ENTRIES);
+	if (dev_priv->gt_fifo_count < GT_FIFO_NUM_RESERVED_ENTRIES ) {
+		int loop = 500;
+		u32 fifo = I915_READ_NOTRACE(GT_FIFO_FREE_ENTRIES);
+		while (fifo <= GT_FIFO_NUM_RESERVED_ENTRIES && loop--) {
+			udelay(10);
+			fifo = I915_READ_NOTRACE(GT_FIFO_FREE_ENTRIES);
+		}
+		WARN_ON(loop < 0 && fifo <= GT_FIFO_NUM_RESERVED_ENTRIES);
+		dev_priv->gt_fifo_count = fifo;
 	}
+	dev_priv->gt_fifo_count--;
 }
 
 static int i915_drm_freeze(struct drm_device *dev)
@@ -577,6 +614,7 @@ int i915_reset(struct drm_device *dev, u8 flags)
 	if (get_seconds() - dev_priv->last_gpu_reset < 5) {
 		DRM_ERROR("GPU hanging too fast, declaring wedged!\n");
 	} else switch (INTEL_INFO(dev)->gen) {
+	case 7:
 	case 6:
 		ret = gen6_do_reset(dev, flags);
 		/* If reset with a user forcewake, try to restore */