Merge tag 'drm-intel-next-fixes-2015-05-29' of git://anongit.freedesktop.org/drm-intel into drm-next

Fixes for 4.2. Nothing too serious (given that it's still pre merge
window). With that it's off for 2 weeks of vacation for me and taking care
of 4.2 fixes for Jani.

* tag 'drm-intel-next-fixes-2015-05-29' of git://anongit.freedesktop.org/drm-intel:
  drm/i915: limit PPGTT size to 2GB in 32-bit platforms
  drm/i915: Another fbdev hack to avoid PSR on fbcon.
  drm/i915: Return the frontbuffer flip to enable intel_crtc_enable_planes.
  drm/i915: disable IPS while getting the sink CRCs
  drm/i915: Disable 12bpc hdmi for now
  drm/i915: Adjust sideband locking a bit for CHV/VLV
  drm/i915: s/dpio_lock/sb_lock/
  drm/i915: Kill intel_flush_primary_plane()
  drm/i915: Throw out WIP CHV power well definitions
  drm/i915: Use the default 600ns LDO programming sequence delay
  drm/i915: Remove unnecessary null check in execlists_context_unqueue
  drm/i915: Use spinlocks for checking when to waitboost
  drm/i915: Fix the confusing comment about the ioctl limits
  Revert "drm/i915: Force clean compilation with -Werror"

24 files changed, 247 insertions, 297 deletions

diff --git a/drivers/gpu/drm/i915/Kconfig b/drivers/gpu/drm/i915/Kconfig
index 5e3aa87e8f48..74acca9bcd9d 100644
--- a/drivers/gpu/drm/i915/Kconfig
+++ b/drivers/gpu/drm/i915/Kconfig
@@ -71,11 +71,3 @@ config DRM_I915_PRELIMINARY_HW_SUPPORT
 	  option changes the default for that module option.
 
 	  If in doubt, say "N".
-
-menu "DRM i915 Debugging"
-
-depends on DRM_I915
-
-source drivers/gpu/drm/i915/Kconfig.debug
-
-endmenu
diff --git a/drivers/gpu/drm/i915/Kconfig.debug b/drivers/gpu/drm/i915/Kconfig.debug
deleted file mode 100644
index 070a03527bc5..000000000000
--- a/drivers/gpu/drm/i915/Kconfig.debug
+++ /dev/null
@@ -1,5 +0,0 @@
-config DRM_I915_WERROR
-	bool "Force GCC to throw an error instead of a warning when compiling"
-	default n
-	---help---
-	  Add -Werror to the build flags for (and only for) i915.ko
diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index 93d99b744531..b7ddf48e1d75 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -2,8 +2,6 @@
 # Makefile for the drm device driver.  This driver provides support for the
 # Direct Rendering Infrastructure (DRI) in XFree86 4.1.0 and higher.
 
-subdir-ccflags-$(CONFIG_DRM_I915_WERROR) := -Werror
-
 # Please keep these build lists sorted!
 
 # core driver code
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index fece922718e2..88cc793c46d3 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2300,15 +2300,6 @@ static int i915_rps_boost_info(struct seq_file *m, void *data)
 	struct drm_device *dev = node->minor->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct drm_file *file;
-	int ret;
-
-	ret = mutex_lock_interruptible(&dev->struct_mutex);
-	if (ret)
-		return ret;
-
-	ret = mutex_lock_interruptible(&dev_priv->rps.hw_lock);
-	if (ret)
-		goto unlock;
 
 	seq_printf(m, "RPS enabled? %d\n", dev_priv->rps.enabled);
 	seq_printf(m, "GPU busy? %d\n", dev_priv->mm.busy);
@@ -2319,6 +2310,7 @@ static int i915_rps_boost_info(struct seq_file *m, void *data)
 		   intel_gpu_freq(dev_priv, dev_priv->rps.min_freq_softlimit),
 		   intel_gpu_freq(dev_priv, dev_priv->rps.max_freq_softlimit),
 		   intel_gpu_freq(dev_priv, dev_priv->rps.max_freq));
+	spin_lock(&dev_priv->rps.client_lock);
 	list_for_each_entry_reverse(file, &dev->filelist, lhead) {
 		struct drm_i915_file_private *file_priv = file->driver_priv;
 		struct task_struct *task;
@@ -2339,12 +2331,9 @@ static int i915_rps_boost_info(struct seq_file *m, void *data)
 		   dev_priv->rps.mmioflips.boosts,
 		   list_empty(&dev_priv->rps.mmioflips.link) ? "" : ", active");
 	seq_printf(m, "Kernel boosts: %d\n", dev_priv->rps.boosts);
+	spin_unlock(&dev_priv->rps.client_lock);
 
-	mutex_unlock(&dev_priv->rps.hw_lock);
-unlock:
-	mutex_unlock(&dev->struct_mutex);
-
-	return ret;
+	return 0;
 }
 
 static int i915_llc(struct seq_file *m, void *data)
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index a238889630d8..d2df321ba634 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -814,7 +814,7 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
 	spin_lock_init(&dev_priv->uncore.lock);
 	spin_lock_init(&dev_priv->mm.object_stat_lock);
 	spin_lock_init(&dev_priv->mmio_flip_lock);
-	mutex_init(&dev_priv->dpio_lock);
+	mutex_init(&dev_priv->sb_lock);
 	mutex_init(&dev_priv->modeset_restore_lock);
 	mutex_init(&dev_priv->csr_lock);
 
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 9adfd124ad2d..72f5a3f9dbf2 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1089,9 +1089,12 @@ struct intel_gen6_power_mgmt {
 	int last_adj;
 	enum { LOW_POWER, BETWEEN, HIGH_POWER } power;
 
+	spinlock_t client_lock;
+	struct list_head clients;
+	bool client_boost;
+
 	bool enabled;
 	struct delayed_work delayed_resume_work;
-	struct list_head clients;
 	unsigned boosts;
 
 	struct intel_rps_client semaphores, mmioflips;
@@ -1101,7 +1104,9 @@ struct intel_gen6_power_mgmt {
 
 	/*
 	 * Protects RPS/RC6 register access and PCU communication.
-	 * Must be taken after struct_mutex if nested.
+	 * Must be taken after struct_mutex if nested. Note that
+	 * this lock may be held for long periods of time when
+	 * talking to hw - so only take it when talking to hw!
 	 */
 	struct mutex hw_lock;
 };
@@ -1661,8 +1666,8 @@ struct drm_i915_private {
 	/* To control wakeup latency, e.g. for irq-driven dp aux transfers. */
 	struct pm_qos_request pm_qos;
 
-	/* DPIO indirect register protection */
-	struct mutex dpio_lock;
+	/* Sideband mailbox protection */
+	struct mutex sb_lock;
 
 	/** Cached value of IMR to avoid reads in updating the bitfield */
 	union {
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index cc206f199d66..be35f0486202 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -5223,9 +5223,9 @@ void i915_gem_release(struct drm_device *dev, struct drm_file *file)
 	spin_unlock(&file_priv->mm.lock);
 
 	if (!list_empty(&file_priv->rps.link)) {
-		mutex_lock(&to_i915(dev)->rps.hw_lock);
+		spin_lock(&to_i915(dev)->rps.client_lock);
 		list_del(&file_priv->rps.link);
-		mutex_unlock(&to_i915(dev)->rps.hw_lock);
+		spin_unlock(&to_i915(dev)->rps.client_lock);
 	}
 }
 
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 17b7df0b561f..619dad1b2386 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -952,6 +952,13 @@ static int gen8_ppgtt_init(struct i915_hw_ppgtt *ppgtt)
 
 	ppgtt->base.start = 0;
 	ppgtt->base.total = 1ULL << 32;
+	if (IS_ENABLED(CONFIG_X86_32))
+		/* While we have a proliferation of size_t variables
+		 * we cannot represent the full ppgtt size on 32bit,
+		 * so limit it to the same size as the GGTT (currently
+		 * 2GiB).
+		 */
+		ppgtt->base.total = to_i915(ppgtt->base.dev)->gtt.base.total;
 	ppgtt->base.cleanup = gen8_ppgtt_cleanup;
 	ppgtt->base.allocate_va_range = gen8_alloc_va_range;
 	ppgtt->base.insert_entries = gen8_ppgtt_insert_entries;
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 707e2ca8fbd8..e6bb72dca3ff 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -1086,8 +1086,9 @@ static void gen6_pm_rps_work(struct work_struct *work)
 {
 	struct drm_i915_private *dev_priv =
 		container_of(work, struct drm_i915_private, rps.work);
+	bool client_boost;
+	int new_delay, adj, min, max;
 	u32 pm_iir;
-	int new_delay, adj;
 
 	spin_lock_irq(&dev_priv->irq_lock);
 	/* Speed up work cancelation during disabling rps interrupts. */
@@ -1099,12 +1100,14 @@ static void gen6_pm_rps_work(struct work_struct *work)
 	dev_priv->rps.pm_iir = 0;
 	/* Make sure not to corrupt PMIMR state used by ringbuffer on GEN6 */
 	gen6_enable_pm_irq(dev_priv, dev_priv->pm_rps_events);
+	client_boost = dev_priv->rps.client_boost;
+	dev_priv->rps.client_boost = false;
 	spin_unlock_irq(&dev_priv->irq_lock);
 
 	/* Make sure we didn't queue anything we're not going to process. */
 	WARN_ON(pm_iir & ~dev_priv->pm_rps_events);
 
-	if ((pm_iir & dev_priv->pm_rps_events) == 0)
+	if ((pm_iir & dev_priv->pm_rps_events) == 0 && !client_boost)
 		return;
 
 	mutex_lock(&dev_priv->rps.hw_lock);
@@ -1113,7 +1116,13 @@ static void gen6_pm_rps_work(struct work_struct *work)
 
 	adj = dev_priv->rps.last_adj;
 	new_delay = dev_priv->rps.cur_freq;
-	if (pm_iir & GEN6_PM_RP_UP_THRESHOLD) {
+	min = dev_priv->rps.min_freq_softlimit;
+	max = dev_priv->rps.max_freq_softlimit;
+
+	if (client_boost) {
+		new_delay = dev_priv->rps.max_freq_softlimit;
+		adj = 0;
+	} else if (pm_iir & GEN6_PM_RP_UP_THRESHOLD) {
 		if (adj > 0)
 			adj *= 2;
 		else /* CHV needs even encode values */
@@ -1149,9 +1158,7 @@ static void gen6_pm_rps_work(struct work_struct *work)
 	 * interrupt
 	 */
 	new_delay += adj;
-	new_delay = clamp_t(int, new_delay,
-			    dev_priv->rps.min_freq_softlimit,
-			    dev_priv->rps.max_freq_softlimit);
+	new_delay = clamp_t(int, new_delay, min, max);
 
 	intel_set_rps(dev_priv->dev, new_delay);
 
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 607766d0a15d..6d3fead3a358 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -595,10 +595,6 @@ enum punit_power_well {
 	PUNIT_POWER_WELL_DPIO_RX0		= 10,
 	PUNIT_POWER_WELL_DPIO_RX1		= 11,
 	PUNIT_POWER_WELL_DPIO_CMN_D		= 12,
-	/* FIXME: guesswork below */
-	PUNIT_POWER_WELL_DPIO_TX_D_LANES_01	= 13,
-	PUNIT_POWER_WELL_DPIO_TX_D_LANES_23	= 14,
-	PUNIT_POWER_WELL_DPIO_RX2		= 15,
 
 	PUNIT_POWER_WELL_NUM,
 };
@@ -2145,6 +2141,10 @@ enum skl_disp_power_wells {
 #define DPIO_PHY_STATUS			(VLV_DISPLAY_BASE + 0x6240)
 #define   DPLL_PORTD_READY_MASK		(0xf)
 #define DISPLAY_PHY_CONTROL (VLV_DISPLAY_BASE + 0x60100)
+#define   PHY_LDO_DELAY_0NS			0x0
+#define   PHY_LDO_DELAY_200NS			0x1
+#define   PHY_LDO_DELAY_600NS			0x2
+#define   PHY_LDO_SEQ_DELAY(delay, phy)		((delay) << (2*(phy)+23))
 #define   PHY_CH_SU_PSR				0x1
 #define   PHY_CH_DEEP_PSR			0x7
 #define   PHY_CH_POWER_MODE(mode, phy, ch)	((mode) << (6*(phy)+3*(ch)+2))
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 657a33366e92..4e3f302d86f7 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -1140,9 +1140,9 @@ static void assert_dsi_pll(struct drm_i915_private *dev_priv, bool state)
 	u32 val;
 	bool cur_state;
 
-	mutex_lock(&dev_priv->dpio_lock);
+	mutex_lock(&dev_priv->sb_lock);
 	val = vlv_cck_read(dev_priv, CCK_REG_DSI_PLL_CONTROL);
-	mutex_unlock(&dev_priv->dpio_lock);
+	mutex_unlock(&dev_priv->sb_lock);
 
 	cur_state = val & DSI_PLL_VCO_EN;
 	I915_STATE_WARN(cur_state != state,
@@ -1661,13 +1661,15 @@ static void chv_enable_pll(struct intel_crtc *crtc,
 
 	BUG_ON(!IS_CHERRYVIEW(dev_priv->dev));
 
-	mutex_lock(&dev_priv->dpio_lock);
+	mutex_lock(&dev_priv->sb_lock);
 
 	/* Enable back the 10bit clock to display controller */
 	tmp = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW14(port));
 	tmp |= DPIO_DCLKP_EN;
 	vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW14(port), tmp);
 
+	mutex_unlock(&dev_priv->sb_lock);
+
 	/*
 	 * Need to wait > 100ns between dclkp clock enable bit and PLL enable.
 	 */
@@ -1683,8 +1685,6 @@ static void chv_enable_pll(struct intel_crtc *crtc,
 	/* not sure when this should be written */
 	I915_WRITE(DPLL_MD(pipe), pipe_config->dpll_hw_state.dpll_md);
 	POSTING_READ(DPLL_MD(pipe));
-
-	mutex_unlock(&dev_priv->dpio_lock);
 }
 
 static int intel_num_dvo_pipes(struct drm_device *dev)
@@ -1826,7 +1826,7 @@ static void chv_disable_pll(struct drm_i915_private *dev_priv, enum pipe pipe)
 	I915_WRITE(DPLL(pipe), val);
 	POSTING_READ(DPLL(pipe));
 
-	mutex_lock(&dev_priv->dpio_lock);
+	mutex_lock(&dev_priv->sb_lock);
 
 	/* Disable 10bit clock to display controller */
 	val = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW14(port));
@@ -1844,7 +1844,7 @@ static void chv_disable_pll(struct drm_i915_private *dev_priv, enum pipe pipe)
 		vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW1_CH1, val);
 	}
 
-	mutex_unlock(&dev_priv->dpio_lock);
+	mutex_unlock(&dev_priv->sb_lock);
 }
 
 void vlv_wait_port_ready(struct drm_i915_private *dev_priv,
@@ -2210,20 +2210,6 @@ static void intel_disable_pipe(struct intel_crtc *crtc)
 		intel_wait_for_pipe_off(crtc);
 }
 
-/*
- * Plane regs are double buffered, going from enabled->disabled needs a
- * trigger in order to latch.  The display address reg provides this.
- */
-void intel_flush_primary_plane(struct drm_i915_private *dev_priv,
-			       enum plane plane)
-{
-	struct drm_device *dev = dev_priv->dev;
-	u32 reg = INTEL_INFO(dev)->gen >= 4 ? DSPSURF(plane) : DSPADDR(plane);
-
-	I915_WRITE(reg, I915_READ(reg));
-	POSTING_READ(reg);
-}
-
 /**
  * intel_enable_primary_hw_plane - enable the primary plane on a given pipe
  * @plane:  plane to be enabled
@@ -3953,7 +3939,7 @@ static void lpt_program_iclkip(struct drm_crtc *crtc)
 	u32 divsel, phaseinc, auxdiv, phasedir = 0;
 	u32 temp;
 
-	mutex_lock(&dev_priv->dpio_lock);
+	mutex_lock(&dev_priv->sb_lock);
 
 	/* It is necessary to ungate the pixclk gate prior to programming
 	 * the divisors, and gate it back when it is done.
@@ -4030,7 +4016,7 @@ static void lpt_program_iclkip(struct drm_crtc *crtc)
 
 	I915_WRITE(PIXCLK_GATE, PIXCLK_GATE_UNGATE);
 
-	mutex_unlock(&dev_priv->dpio_lock);
+	mutex_unlock(&dev_priv->sb_lock);
 }
 
 static void ironlake_pch_transcoder_set_timings(struct intel_crtc *crtc,
@@ -4842,11 +4828,22 @@ intel_pre_disable_primary(struct drm_crtc *crtc)
 
 static void intel_crtc_enable_planes(struct drm_crtc *crtc)
 {
+	struct drm_device *dev = crtc->dev;
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	int pipe = intel_crtc->pipe;
+
 	intel_enable_primary_hw_plane(crtc->primary, crtc);
 	intel_enable_sprite_planes(crtc);
 	intel_crtc_update_cursor(crtc, true);
 
 	intel_post_enable_primary(crtc);
+
+	/*
+	 * FIXME: Once we grow proper nuclear flip support out of this we need
+	 * to compute the mask of flip planes precisely. For the time being
+	 * consider this a flip to a NULL plane.
+	 */
+	intel_frontbuffer_flip(dev, INTEL_FRONTBUFFER_ALL_MASK(pipe));
 }
 
 static void intel_crtc_disable_planes(struct drm_crtc *crtc)
@@ -5742,10 +5739,10 @@ static int valleyview_get_vco(struct drm_i915_private *dev_priv)
 	int hpll_freq, vco_freq[] = { 800, 1600, 2000, 2400 };
 
 	/* Obtain SKU information */
-	mutex_lock(&dev_priv->dpio_lock);
+	mutex_lock(&dev_priv->sb_lock);
 	hpll_freq = vlv_cck_read(dev_priv, CCK_FUSE_REG) &
 		CCK_FUSE_HPLL_FREQ_MASK;
-	mutex_unlock(&dev_priv->dpio_lock);
+	mutex_unlock(&dev_priv->sb_lock);
 
 	return vco_freq[hpll_freq] * 1000;
 }
@@ -5794,12 +5791,13 @@ static void valleyview_set_cdclk(struct drm_device *dev, int cdclk)
 	}
 	mutex_unlock(&dev_priv->rps.hw_lock);
 
+	mutex_lock(&dev_priv->sb_lock);
+
 	if (cdclk == 400000) {
 		u32 divider;
 
 		divider = DIV_ROUND_CLOSEST(dev_priv->hpll_freq << 1, cdclk) - 1;
 
-		mutex_lock(&dev_priv->dpio_lock);
 		/* adjust cdclk divider */
 		val = vlv_cck_read(dev_priv, CCK_DISPLAY_CLOCK_CONTROL);
 		val &= ~DISPLAY_FREQUENCY_VALUES;
@@ -5810,10 +5808,8 @@ static void valleyview_set_cdclk(struct drm_device *dev, int cdclk)
 			      DISPLAY_FREQUENCY_STATUS) == (divider << DISPLAY_FREQUENCY_STATUS_SHIFT),
 			     50))
 			DRM_ERROR("timed out waiting for CDclk change\n");
-		mutex_unlock(&dev_priv->dpio_lock);
 	}
 
-	mutex_lock(&dev_priv->dpio_lock);
 	/* adjust self-refresh exit latency value */
 	val = vlv_bunit_read(dev_priv, BUNIT_REG_BISOC);
 	val &= ~0x7f;
@@ -5827,7 +5823,8 @@ static void valleyview_set_cdclk(struct drm_device *dev, int cdclk)
 	else
 		val |= 3000 / 250; /* 3.0 usec */
 	vlv_bunit_write(dev_priv, BUNIT_REG_BISOC, val);
-	mutex_unlock(&dev_priv->dpio_lock);
+
+	mutex_unlock(&dev_priv->sb_lock);
 
 	vlv_update_cdclk(dev);
 }
@@ -6755,9 +6752,9 @@ static int valleyview_get_display_clock_speed(struct drm_device *dev)
 	if (dev_priv->hpll_freq == 0)
 		dev_priv->hpll_freq = valleyview_get_vco(dev_priv);
 
-	mutex_lock(&dev_priv->dpio_lock);
+	mutex_lock(&dev_priv->sb_lock);
 	val = vlv_cck_read(dev_priv, CCK_DISPLAY_CLOCK_CONTROL);
-	mutex_unlock(&dev_priv->dpio_lock);
+	mutex_unlock(&dev_priv->sb_lock);
 
 	divider = val & DISPLAY_FREQUENCY_VALUES;
 
@@ -7099,7 +7096,7 @@ static void vlv_prepare_pll(struct intel_crtc *crtc,
 	u32 bestn, bestm1, bestm2, bestp1, bestp2;
 	u32 coreclk, reg_val;
 
-	mutex_lock(&dev_priv->dpio_lock);
+	mutex_lock(&dev_priv->sb_lock);
 
 	bestn = pipe_config->dpll.n;
 	bestm1 = pipe_config->dpll.m1;
@@ -7177,7 +7174,7 @@ static void vlv_prepare_pll(struct intel_crtc *crtc,
 	vlv_dpio_write(dev_priv, pipe, VLV_PLL_DW7(pipe), coreclk);
 
 	vlv_dpio_write(dev_priv, pipe, VLV_PLL_DW11(pipe), 0x87871000);
-	mutex_unlock(&dev_priv->dpio_lock);
+	mutex_unlock(&dev_priv->sb_lock);
 }
 
 static void chv_update_pll(struct intel_crtc *crtc,
@@ -7222,7 +7219,7 @@ static void chv_prepare_pll(struct intel_crtc *crtc,
 	I915_WRITE(dpll_reg,
 		   pipe_config->dpll_hw_state.dpll & ~DPLL_VCO_ENABLE);
 
-	mutex_lock(&dev_priv->dpio_lock);
+	mutex_lock(&dev_priv->sb_lock);
 
 	/* p1 and p2 divider */
 	vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW13(port),
@@ -7295,7 +7292,7 @@ static void chv_prepare_pll(struct intel_crtc *crtc,
 			vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW14(port)) |
 			DPIO_AFC_RECAL);
 
-	mutex_unlock(&dev_priv->dpio_lock);
+	mutex_unlock(&dev_priv->sb_lock);
 }
 
 /**
@@ -7796,9 +7793,9 @@ static void vlv_crtc_clock_get(struct intel_crtc *crtc,
 	if (!(pipe_config->dpll_hw_state.dpll & DPLL_VCO_ENABLE))
 		return;
 
-	mutex_lock(&dev_priv->dpio_lock);
+	mutex_lock(&dev_priv->sb_lock);
 	mdiv = vlv_dpio_read(dev_priv, pipe, VLV_PLL_DW3(pipe));
-	mutex_unlock(&dev_priv->dpio_lock);
+	mutex_unlock(&dev_priv->sb_lock);
 
 	clock.m1 = (mdiv >> DPIO_M1DIV_SHIFT) & 7;
 	clock.m2 = mdiv & DPIO_M2DIV_MASK;
@@ -7892,12 +7889,12 @@ static void chv_crtc_clock_get(struct intel_crtc *crtc,
 	u32 cmn_dw13, pll_dw0, pll_dw1, pll_dw2;
 	int refclk = 100000;
 
-	mutex_lock(&dev_priv->dpio_lock);
+	mutex_lock(&dev_priv->sb_lock);
 	cmn_dw13 = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW13(port));
 	pll_dw0 = vlv_dpio_read(dev_priv, pipe, CHV_PLL_DW0(port));
 	pll_dw1 = vlv_dpio_read(dev_priv, pipe, CHV_PLL_DW1(port));
 	pll_dw2 = vlv_dpio_read(dev_priv, pipe, CHV_PLL_DW2(port));
-	mutex_unlock(&dev_priv->dpio_lock);
+	mutex_unlock(&dev_priv->sb_lock);
 
 	clock.m1 = (pll_dw1 & 0x7) == DPIO_CHV_M1_DIV_BY_2 ? 2 : 0;
 	clock.m2 = ((pll_dw0 & 0xff) << 22) | (pll_dw2 & 0x3fffff);
@@ -8263,7 +8260,7 @@ static void lpt_enable_clkout_dp(struct drm_device *dev, bool with_spread,
 		 with_fdi, "LP PCH doesn't have FDI\n"))
 		with_fdi = false;
 
-	mutex_lock(&dev_priv->dpio_lock);
+	mutex_lock(&dev_priv->sb_lock);
 
 	tmp = intel_sbi_read(dev_priv, SBI_SSCCTL, SBI_ICLK);
 	tmp &= ~SBI_SSCCTL_DISABLE;
@@ -8289,7 +8286,7 @@ static void lpt_enable_clkout_dp(struct drm_device *dev, bool with_spread,
 	tmp |= SBI_GEN0_CFG_BUFFENABLE_DISABLE;
 	intel_sbi_write(dev_priv, reg, tmp, SBI_ICLK);
 
-	mutex_unlock(&dev_priv->dpio_lock);
+	mutex_unlock(&dev_priv->sb_lock);
 }
 
 /* Sequence to disable CLKOUT_DP */
@@ -8298,7 +8295,7 @@ static void lpt_disable_clkout_dp(struct drm_device *dev)
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	uint32_t reg, tmp;
 
-	mutex_lock(&dev_priv->dpio_lock);
+	mutex_lock(&dev_priv->sb_lock);
 
 	reg = (dev_priv->pch_id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE) ?
 	       SBI_GEN0 : SBI_DBUFF0;
@@ -8317,7 +8314,7 @@ static void lpt_disable_clkout_dp(struct drm_device *dev)
 		intel_sbi_write(dev_priv, SBI_SSCCTL, tmp, SBI_ICLK);
 	}
 
-	mutex_unlock(&dev_priv->dpio_lock);
+	mutex_unlock(&dev_priv->sb_lock);
 }
 
 static void lpt_init_pch_refclk(struct drm_device *dev)
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index abd442af4127..280c282da9bd 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -2355,7 +2355,7 @@ static void chv_post_disable_dp(struct intel_encoder *encoder)
 
 	intel_dp_link_down(intel_dp);
 
-	mutex_lock(&dev_priv->dpio_lock);
+	mutex_lock(&dev_priv->sb_lock);
 
 	/* Propagate soft reset to data lane reset */
 	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW1(ch));
@@ -2374,7 +2374,7 @@ static void chv_post_disable_dp(struct intel_encoder *encoder)
 	val &= ~(DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET);
 	vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW0(ch), val);
 
-	mutex_unlock(&dev_priv->dpio_lock);
+	mutex_unlock(&dev_priv->sb_lock);
 }
 
 static void
@@ -2671,7 +2671,7 @@ static void vlv_pre_enable_dp(struct intel_encoder *encoder)
 	int pipe = intel_crtc->pipe;
 	u32 val;
 
-	mutex_lock(&dev_priv->dpio_lock);
+	mutex_lock(&dev_priv->sb_lock);
 
 	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW8(port));
 	val = 0;
@@ -2684,7 +2684,7 @@ static void vlv_pre_enable_dp(struct intel_encoder *encoder)
 	vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW14(port), 0x00760018);
 	vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW23(port), 0x00400888);
 
-	mutex_unlock(&dev_priv->dpio_lock);
+	mutex_unlock(&dev_priv->sb_lock);
 
 	intel_enable_dp(encoder);
 }
@@ -2702,7 +2702,7 @@ static void vlv_dp_pre_pll_enable(struct intel_encoder *encoder)
 	intel_dp_prepare(encoder);
 
 	/* Program Tx lane resets to default */
-	mutex_lock(&dev_priv->dpio_lock);
+	mutex_lock(&dev_priv->sb_lock);
 	vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW0(port),
 			 DPIO_PCS_TX_LANE2_RESET |
 			 DPIO_PCS_TX_LANE1_RESET);
@@ -2716,7 +2716,7 @@ static void vlv_dp_pre_pll_enable(struct intel_encoder *encoder)
 	vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW12(port), 0x00750f00);
 	vlv_dpio_write(dev_priv, pipe, VLV_TX_DW11(port), 0x00001500);
 	vlv_dpio_write(dev_priv, pipe, VLV_TX_DW14(port), 0x40400000);
-	mutex_unlock(&dev_priv->dpio_lock);
+	mutex_unlock(&dev_priv->sb_lock);
 }
 
 static void chv_pre_enable_dp(struct intel_encoder *encoder)
@@ -2732,7 +2732,7 @@ static void chv_pre_enable_dp(struct intel_encoder *encoder)
 	int data, i, stagger;
 	u32 val;
 
-	mutex_lock(&dev_priv->dpio_lock);
+	mutex_lock(&dev_priv->sb_lock);
 
 	/* allow hardware to manage TX FIFO reset source */
 	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW11(ch));
@@ -2802,7 +2802,7 @@ static void chv_pre_enable_dp(struct intel_encoder *encoder)
 		       DPIO_TX1_STAGGER_MULT(7) |
 		       DPIO_TX2_STAGGER_MULT(5));
 
-	mutex_unlock(&dev_priv->dpio_lock);
+	mutex_unlock(&dev_priv->sb_lock);
 
 	intel_enable_dp(encoder);
 }
@@ -2820,7 +2820,7 @@ static void chv_dp_pre_pll_enable(struct intel_encoder *encoder)
 
 	intel_dp_prepare(encoder);
 
-	mutex_lock(&dev_priv->dpio_lock);
+	mutex_lock(&dev_priv->sb_lock);
 
 	/* program left/right clock distribution */
 	if (pipe != PIPE_B) {
@@ -2870,7 +2870,7 @@ static void chv_dp_pre_pll_enable(struct intel_encoder *encoder)
 		val |= CHV_CMN_USEDCLKCHANNEL;
 	vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW19(ch), val);
 
-	mutex_unlock(&dev_priv->dpio_lock);
+	mutex_unlock(&dev_priv->sb_lock);
 }
 
 /*
@@ -3095,7 +3095,7 @@ static uint32_t vlv_signal_levels(struct intel_dp *intel_dp)
 		return 0;
 	}
 
-	mutex_lock(&dev_priv->dpio_lock);
+	mutex_lock(&dev_priv->sb_lock);
 	vlv_dpio_write(dev_priv, pipe, VLV_TX_DW5(port), 0x00000000);
 	vlv_dpio_write(dev_priv, pipe, VLV_TX_DW4(port), demph_reg_value);
 	vlv_dpio_write(dev_priv, pipe, VLV_TX_DW2(port),
@@ -3104,7 +3104,7 @@ static uint32_t vlv_signal_levels(struct intel_dp *intel_dp)
 	vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW11(port), 0x00030000);
 	vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW9(port), preemph_reg_value);
 	vlv_dpio_write(dev_priv, pipe, VLV_TX_DW5(port), 0x80000000);
-	mutex_unlock(&dev_priv->dpio_lock);
+	mutex_unlock(&dev_priv->sb_lock);
 
 	return 0;
 }
@@ -3191,7 +3191,7 @@ static uint32_t chv_signal_levels(struct intel_dp *intel_dp)
 		return 0;
 	}
 
-	mutex_lock(&dev_priv->dpio_lock);
+	mutex_lock(&dev_priv->sb_lock);
 
 	/* Clear calc init */
 	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW10(ch));
@@ -3278,7 +3278,7 @@ static uint32_t chv_signal_levels(struct intel_dp *intel_dp)
 	val |= DPIO_LRC_BYPASS;
 	vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW30, val);
 
-	mutex_unlock(&dev_priv->dpio_lock);
+	mutex_unlock(&dev_priv->sb_lock);
 
 	return 0;
 }
@@ -4041,46 +4041,70 @@ int intel_dp_sink_crc(struct intel_dp *intel_dp, u8 *crc)
 	u8 buf;
 	int test_crc_count;
 	int attempts = 6;
+	int ret = 0;
 
-	if (drm_dp_dpcd_readb(&intel_dp->aux, DP_TEST_SINK_MISC, &buf) < 0)
-		return -EIO;
+	hsw_disable_ips(intel_crtc);
 
-	if (!(buf & DP_TEST_CRC_SUPPORTED))
-		return -ENOTTY;
+	if (drm_dp_dpcd_readb(&intel_dp->aux, DP_TEST_SINK_MISC, &buf) < 0) {
+		ret = -EIO;
+		goto out;
+	}
+
+	if (!(buf & DP_TEST_CRC_SUPPORTED)) {
+		ret = -ENOTTY;
+		goto out;
+	}
 
-	if (drm_dp_dpcd_readb(&intel_dp->aux, DP_TEST_SINK, &buf) < 0)
-		return -EIO;
+	if (drm_dp_dpcd_readb(&intel_dp->aux, DP_TEST_SINK, &buf) < 0) {
+		ret = -EIO;
+		goto out;
+	}
 
 	if (drm_dp_dpcd_writeb(&intel_dp->aux, DP_TEST_SINK,
-				buf | DP_TEST_SINK_START) < 0)
-		return -EIO;
+				buf | DP_TEST_SINK_START) < 0) {
+		ret = -EIO;
+		goto out;
+	}
+
+	if (drm_dp_dpcd_readb(&intel_dp->aux, DP_TEST_SINK_MISC, &buf) < 0) {
+		ret = -EIO;
+		goto out;
+	}
 
-	if (drm_dp_dpcd_readb(&intel_dp->aux, DP_TEST_SINK_MISC, &buf) < 0)
-		return -EIO;
 	test_crc_count = buf & DP_TEST_COUNT_MASK;
 
 	do {
 		if (drm_dp_dpcd_readb(&intel_dp->aux,
-				      DP_TEST_SINK_MISC, &buf) < 0)
-			return -EIO;
+				      DP_TEST_SINK_MISC, &buf) < 0) {
+			ret = -EIO;
+			goto out;
+		}
 		intel_wait_for_vblank(dev, intel_crtc->pipe);
 	} while (--attempts && (buf & DP_TEST_COUNT_MASK) == test_crc_count);
 
 	if (attempts == 0) {
 		DRM_DEBUG_KMS("Panel is unable to calculate CRC after 6 vblanks\n");
-		return -ETIMEDOUT;
+		ret = -ETIMEDOUT;
+		goto out;
 	}
 
-	if (drm_dp_dpcd_read(&intel_dp->aux, DP_TEST_CRC_R_CR, crc, 6) < 0)
-		return -EIO;
+	if (drm_dp_dpcd_read(&intel_dp->aux, DP_TEST_CRC_R_CR, crc, 6) < 0) {
+		ret = -EIO;
+		goto out;
+	}
 
-	if (drm_dp_dpcd_readb(&intel_dp->aux, DP_TEST_SINK, &buf) < 0)
-		return -EIO;
+	if (drm_dp_dpcd_readb(&intel_dp->aux, DP_TEST_SINK, &buf) < 0) {
+		ret = -EIO;
+		goto out;
+	}
 	if (drm_dp_dpcd_writeb(&intel_dp->aux, DP_TEST_SINK,
-			       buf & ~DP_TEST_SINK_START) < 0)
-		return -EIO;
-
-	return 0;
+			       buf & ~DP_TEST_SINK_START) < 0) {
+		ret = -EIO;
+		goto out;
+	}
+out:
+	hsw_enable_ips(intel_crtc);
+	return ret;
 }
 
 static bool
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 02d83178bd03..2afb31a46275 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1383,8 +1383,6 @@ bool intel_sdvo_init(struct drm_device *dev, uint32_t sdvo_reg, bool is_sdvob);
 
 /* intel_sprite.c */
 int intel_plane_init(struct drm_device *dev, enum pipe pipe, int plane);
-void intel_flush_primary_plane(struct drm_i915_private *dev_priv,
-			       enum plane plane);
 int intel_plane_restore(struct drm_plane *plane);
 int intel_sprite_set_colorkey(struct drm_device *dev, void *data,
 			      struct drm_file *file_priv);
diff --git a/drivers/gpu/drm/i915/intel_dsi.c b/drivers/gpu/drm/i915/intel_dsi.c
index 51966426addf..b5a5558ecd63 100644
--- a/drivers/gpu/drm/i915/intel_dsi.c
+++ b/drivers/gpu/drm/i915/intel_dsi.c
@@ -239,7 +239,7 @@ static int dpi_send_cmd(struct intel_dsi *intel_dsi, u32 cmd, bool hs,
 
 static void band_gap_reset(struct drm_i915_private *dev_priv)
 {
-	mutex_lock(&dev_priv->dpio_lock);
+	mutex_lock(&dev_priv->sb_lock);
 
 	vlv_flisdsi_write(dev_priv, 0x08, 0x0001);
 	vlv_flisdsi_write(dev_priv, 0x0F, 0x0005);
@@ -248,7 +248,7 @@ static void band_gap_reset(struct drm_i915_private *dev_priv)
 	vlv_flisdsi_write(dev_priv, 0x0F, 0x0000);
 	vlv_flisdsi_write(dev_priv, 0x08, 0x0000);
 
-	mutex_unlock(&dev_priv->dpio_lock);
+	mutex_unlock(&dev_priv->sb_lock);
 }
 
 static inline bool is_vid_mode(struct intel_dsi *intel_dsi)
@@ -346,11 +346,11 @@ static void intel_dsi_device_ready(struct intel_encoder *encoder)
 
 	DRM_DEBUG_KMS("\n");
 
-	mutex_lock(&dev_priv->dpio_lock);
+	mutex_lock(&dev_priv->sb_lock);
 	/* program rcomp for compliance, reduce from 50 ohms to 45 ohms
 	 * needed everytime after power gate */
 	vlv_flisdsi_write(dev_priv, 0x04, 0x0004);
-	mutex_unlock(&dev_priv->dpio_lock);
+	mutex_unlock(&dev_priv->sb_lock);
 
 	/* bandgap reset is needed after everytime we do power gate */
 	band_gap_reset(dev_priv);
diff --git a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c b/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
index d2cd8d5b27a1..a5e99ac305da 100644
--- a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
+++ b/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
@@ -212,7 +212,7 @@ static const u8 *mipi_exec_gpio(struct intel_dsi *intel_dsi, const u8 *data)
 	function = gtable[gpio].function_reg;
 	pad = gtable[gpio].pad_reg;
 
-	mutex_lock(&dev_priv->dpio_lock);
+	mutex_lock(&dev_priv->sb_lock);
 	if (!gtable[gpio].init) {
 		/* program the function */
 		/* FIXME: remove constant below */
@@ -224,7 +224,7 @@ static const u8 *mipi_exec_gpio(struct intel_dsi *intel_dsi, const u8 *data)
 
 	/* pull up/down */
 	vlv_gpio_nc_write(dev_priv, pad, val);
-	mutex_unlock(&dev_priv->dpio_lock);
+	mutex_unlock(&dev_priv->sb_lock);
 
 	return data;
 }
diff --git a/drivers/gpu/drm/i915/intel_dsi_pll.c b/drivers/gpu/drm/i915/intel_dsi_pll.c
index 9688d996af31..d20cf37b6901 100644
--- a/drivers/gpu/drm/i915/intel_dsi_pll.c
+++ b/drivers/gpu/drm/i915/intel_dsi_pll.c
@@ -244,7 +244,7 @@ void vlv_enable_dsi_pll(struct intel_encoder *encoder)
 
 	DRM_DEBUG_KMS("\n");
 
-	mutex_lock(&dev_priv->dpio_lock);
+	mutex_lock(&dev_priv->sb_lock);
 
 	vlv_configure_dsi_pll(encoder);
 
@@ -258,11 +258,11 @@ void vlv_enable_dsi_pll(struct intel_encoder *encoder)
 	if (wait_for(vlv_cck_read(dev_priv, CCK_REG_DSI_PLL_CONTROL) &
 						DSI_PLL_LOCK, 20)) {
 
-		mutex_unlock(&dev_priv->dpio_lock);
+		mutex_unlock(&dev_priv->sb_lock);
 		DRM_ERROR("DSI PLL lock failed\n");
 		return;
 	}
-	mutex_unlock(&dev_priv->dpio_lock);
+	mutex_unlock(&dev_priv->sb_lock);
 
 	DRM_DEBUG_KMS("DSI PLL locked\n");
 }
@@ -274,14 +274,14 @@ void vlv_disable_dsi_pll(struct intel_encoder *encoder)
 
 	DRM_DEBUG_KMS("\n");
 
-	mutex_lock(&dev_priv->dpio_lock);
+	mutex_lock(&dev_priv->sb_lock);
 
 	tmp = vlv_cck_read(dev_priv, CCK_REG_DSI_PLL_CONTROL);
 	tmp &= ~DSI_PLL_VCO_EN;
 	tmp |= DSI_PLL_LDO_GATE;
 	vlv_cck_write(dev_priv, CCK_REG_DSI_PLL_CONTROL, tmp);
 
-	mutex_unlock(&dev_priv->dpio_lock);
+	mutex_unlock(&dev_priv->sb_lock);
 }
 
 static void assert_bpp_mismatch(int pixel_format, int pipe_bpp)
@@ -319,10 +319,10 @@ u32 vlv_get_dsi_pclk(struct intel_encoder *encoder, int pipe_bpp)
 
 	DRM_DEBUG_KMS("\n");
 
-	mutex_lock(&dev_priv->dpio_lock);
+	mutex_lock(&dev_priv->sb_lock);
 	pll_ctl = vlv_cck_read(dev_priv, CCK_REG_DSI_PLL_CONTROL);
 	pll_div = vlv_cck_read(dev_priv, CCK_REG_DSI_PLL_DIVIDER);
-	mutex_unlock(&dev_priv->dpio_lock);
+	mutex_unlock(&dev_priv->sb_lock);
 
 	/* mask out other bits and extract the P1 divisor */
 	pll_ctl &= DSI_PLL_P1_POST_DIV_MASK;
diff --git a/drivers/gpu/drm/i915/intel_fbdev.c b/drivers/gpu/drm/i915/intel_fbdev.c
index 4e7e7da2e03b..6372cfc7d053 100644
--- a/drivers/gpu/drm/i915/intel_fbdev.c
+++ b/drivers/gpu/drm/i915/intel_fbdev.c
@@ -96,6 +96,32 @@ static int intel_fbdev_blank(int blank, struct fb_info *info)
 	return ret;
 }
 
+static int intel_fbdev_pan_display(struct fb_var_screeninfo *var,
+				   struct fb_info *info)
+{
+	struct drm_fb_helper *fb_helper = info->par;
+	struct intel_fbdev *ifbdev =
+		container_of(fb_helper, struct intel_fbdev, helper);
+
+	int ret;
+	ret = drm_fb_helper_pan_display(var, info);
+
+	if (ret == 0) {
+		/*
+		 * FIXME: fbdev presumes that all callbacks also work from
+		 * atomic contexts and relies on that for emergency oops
+		 * printing. KMS totally doesn't do that and the locking here is
+		 * by far not the only place this goes wrong.  Ignore this for
+		 * now until we solve this for real.
+		 */
+		mutex_lock(&fb_helper->dev->struct_mutex);
+		intel_fb_obj_invalidate(ifbdev->fb->obj, NULL, ORIGIN_GTT);
+		mutex_unlock(&fb_helper->dev->struct_mutex);
+	}
+
+	return ret;
+}
+
 static struct fb_ops intelfb_ops = {
 	.owner = THIS_MODULE,
 	.fb_check_var = drm_fb_helper_check_var,
@@ -103,7 +129,7 @@ static struct fb_ops intelfb_ops = {
 	.fb_fillrect = cfb_fillrect,
 	.fb_copyarea = cfb_copyarea,
 	.fb_imageblit = cfb_imageblit,
-	.fb_pan_display = drm_fb_helper_pan_display,
+	.fb_pan_display = intel_fbdev_pan_display,
 	.fb_blank = intel_fbdev_blank,
 	.fb_setcmap = drm_fb_helper_setcmap,
 	.fb_debug_enter = drm_fb_helper_debug_enter,
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index e7e90610cc6f..e97731aab6dc 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -1036,7 +1036,8 @@ bool intel_hdmi_compute_config(struct intel_encoder *encoder,
 	 */
 	if (pipe_config->pipe_bpp > 8*3 && pipe_config->has_hdmi_sink &&
 	    clock_12bpc <= portclock_limit &&
-	    hdmi_12bpc_possible(pipe_config)) {
+	    hdmi_12bpc_possible(pipe_config) &&
+	    0 /* FIXME 12bpc support totally broken */) {
 		DRM_DEBUG_KMS("picking bpc to 12 for HDMI output\n");
 		desired_bpp = 12*3;
 
@@ -1293,7 +1294,7 @@ static void vlv_hdmi_pre_enable(struct intel_encoder *encoder)
 	u32 val;
 
 	/* Enable clock channels for this port */
-	mutex_lock(&dev_priv->dpio_lock);
+	mutex_lock(&dev_priv->sb_lock);
 	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW8(port));
 	val = 0;
 	if (pipe)
@@ -1316,7 +1317,7 @@ static void vlv_hdmi_pre_enable(struct intel_encoder *encoder)
 	/* Program lane clock */
 	vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW14(port), 0x00760018);
 	vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW23(port), 0x00400888);
-	mutex_unlock(&dev_priv->dpio_lock);
+	mutex_unlock(&dev_priv->sb_lock);
 
 	intel_hdmi->set_infoframes(&encoder->base,
 				   intel_crtc->config->has_hdmi_sink,
@@ -1340,7 +1341,7 @@ static void vlv_hdmi_pre_pll_enable(struct intel_encoder *encoder)
 	intel_hdmi_prepare(encoder);
 
 	/* Program Tx lane resets to default */
-	mutex_lock(&dev_priv->dpio_lock);
+	mutex_lock(&dev_priv->sb_lock);
 	vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW0(port),
 			 DPIO_PCS_TX_LANE2_RESET |
 			 DPIO_PCS_TX_LANE1_RESET);
@@ -1357,7 +1358,7 @@ static void vlv_hdmi_pre_pll_enable(struct intel_encoder *encoder)
 
 	vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW9(port), 0x00002000);
 	vlv_dpio_write(dev_priv, pipe, VLV_TX_DW5(port), DPIO_TX_OCALINIT_EN);
-	mutex_unlock(&dev_priv->dpio_lock);
+	mutex_unlock(&dev_priv->sb_lock);
 }
 
 static void chv_hdmi_pre_pll_enable(struct intel_encoder *encoder)
@@ -1373,7 +1374,7 @@ static void chv_hdmi_pre_pll_enable(struct intel_encoder *encoder)
 
 	intel_hdmi_prepare(encoder);
 
-	mutex_lock(&dev_priv->dpio_lock);
+	mutex_lock(&dev_priv->sb_lock);
 
 	/* program left/right clock distribution */
 	if (pipe != PIPE_B) {
@@ -1423,7 +1424,7 @@ static void chv_hdmi_pre_pll_enable(struct intel_encoder *encoder)
 		val |= CHV_CMN_USEDCLKCHANNEL;
 	vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW19(ch), val);
 
-	mutex_unlock(&dev_priv->dpio_lock);
+	mutex_unlock(&dev_priv->sb_lock);
 }
 
 static void vlv_hdmi_post_disable(struct intel_encoder *encoder)
@@ -1436,10 +1437,10 @@ static void vlv_hdmi_post_disable(struct intel_encoder *encoder)
 	int pipe = intel_crtc->pipe;
 
 	/* Reset lanes to avoid HDMI flicker (VLV w/a) */
-	mutex_lock(&dev_priv->dpio_lock);
+	mutex_lock(&dev_priv->sb_lock);
 	vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW0(port), 0x00000000);
 	vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW1(port), 0x00e00060);
-	mutex_unlock(&dev_priv->dpio_lock);
+	mutex_unlock(&dev_priv->sb_lock);
 }
 
 static void chv_hdmi_post_disable(struct intel_encoder *encoder)
@@ -1453,7 +1454,7 @@ static void chv_hdmi_post_disable(struct intel_encoder *encoder)
 	enum pipe pipe = intel_crtc->pipe;
 	u32 val;
 
-	mutex_lock(&dev_priv->dpio_lock);
+	mutex_lock(&dev_priv->sb_lock);
 
 	/* Propagate soft reset to data lane reset */
 	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW1(ch));
@@ -1472,7 +1473,7 @@ static void chv_hdmi_post_disable(struct intel_encoder *encoder)
 	val &= ~(DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET);
 	vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW0(ch), val);
 
-	mutex_unlock(&dev_priv->dpio_lock);
+	mutex_unlock(&dev_priv->sb_lock);
 }
 
 static void chv_hdmi_pre_enable(struct intel_encoder *encoder)
@@ -1490,7 +1491,7 @@ static void chv_hdmi_pre_enable(struct intel_encoder *encoder)
 	int data, i, stagger;
 	u32 val;
 
-	mutex_lock(&dev_priv->dpio_lock);
+	mutex_lock(&dev_priv->sb_lock);
 
 	/* allow hardware to manage TX FIFO reset source */
 	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW11(ch));
@@ -1633,7 +1634,7 @@ static void chv_hdmi_pre_enable(struct intel_encoder *encoder)
 	val |= DPIO_LRC_BYPASS;
 	vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW30, val);
 
-	mutex_unlock(&dev_priv->dpio_lock);
+	mutex_unlock(&dev_priv->sb_lock);
 
 	intel_hdmi->set_infoframes(&encoder->base,
 				   intel_crtc->config->has_hdmi_sink,
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 96ae90affad5..9f5485ddcbe6 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -427,7 +427,7 @@ static void execlists_context_unqueue(struct intel_engine_cs *ring)
 		 * WaIdleLiteRestore: make sure we never cause a lite
 		 * restore with HEAD==TAIL
 		 */
-		if (req0 && req0->elsp_submitted) {
+		if (req0->elsp_submitted) {
 			/*
 			 * Apply the wa NOOPS to prevent ring:HEAD == req:TAIL
 			 * as we resubmit the request. See gen8_emit_request()
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 55d993110d51..c5914564939c 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -4143,17 +4143,25 @@ void gen6_rps_idle(struct drm_i915_private *dev_priv)
 		dev_priv->rps.last_adj = 0;
 		I915_WRITE(GEN6_PMINTRMSK, 0xffffffff);
 	}
+	mutex_unlock(&dev_priv->rps.hw_lock);
 
+	spin_lock(&dev_priv->rps.client_lock);
 	while (!list_empty(&dev_priv->rps.clients))
 		list_del_init(dev_priv->rps.clients.next);
-	mutex_unlock(&dev_priv->rps.hw_lock);
+	spin_unlock(&dev_priv->rps.client_lock);
 }
 
 void gen6_rps_boost(struct drm_i915_private *dev_priv,
 		    struct intel_rps_client *rps,
 		    unsigned long submitted)
 {
-	u32 val;
+	/* This is intentionally racy! We peek at the state here, then
+	 * validate inside the RPS worker.
+	 */
+	if (!(dev_priv->mm.busy &&
+	      dev_priv->rps.enabled &&
+	      dev_priv->rps.cur_freq < dev_priv->rps.max_freq_softlimit))
+		return;
 
 	/* Force a RPS boost (and don't count it against the client) if
 	 * the GPU is severely congested.
@@ -4161,14 +4169,14 @@ void gen6_rps_boost(struct drm_i915_private *dev_priv,
 	if (rps && time_after(jiffies, submitted + DRM_I915_THROTTLE_JIFFIES))
 		rps = NULL;
 
-	mutex_lock(&dev_priv->rps.hw_lock);
-	val = dev_priv->rps.max_freq_softlimit;
-	if (dev_priv->rps.enabled &&
-	    dev_priv->mm.busy &&
-	    dev_priv->rps.cur_freq < val &&
-	    (rps == NULL || list_empty(&rps->link))) {
-		intel_set_rps(dev_priv->dev, val);
-		dev_priv->rps.last_adj = 0;
+	spin_lock(&dev_priv->rps.client_lock);
+	if (rps == NULL || list_empty(&rps->link)) {
+		spin_lock_irq(&dev_priv->irq_lock);
+		if (dev_priv->rps.interrupts_enabled) {
+			dev_priv->rps.client_boost = true;
+			queue_work(dev_priv->wq, &dev_priv->rps.work);
+		}
+		spin_unlock_irq(&dev_priv->irq_lock);
 
 		if (rps != NULL) {
 			list_add(&rps->link, &dev_priv->rps.clients);
@@ -4176,7 +4184,7 @@ void gen6_rps_boost(struct drm_i915_private *dev_priv,
 		} else
 			dev_priv->rps.boosts++;
 	}
-	mutex_unlock(&dev_priv->rps.hw_lock);
+	spin_unlock(&dev_priv->rps.client_lock);
 }
 
 void intel_set_rps(struct drm_device *dev, u8 val)
@@ -4956,9 +4964,9 @@ static void cherryview_init_gt_powersave(struct drm_device *dev)
 
 	mutex_lock(&dev_priv->rps.hw_lock);
 
-	mutex_lock(&dev_priv->dpio_lock);
+	mutex_lock(&dev_priv->sb_lock);
 	val = vlv_cck_read(dev_priv, CCK_FUSE_REG);
-	mutex_unlock(&dev_priv->dpio_lock);
+	mutex_unlock(&dev_priv->sb_lock);
 
 	switch ((val >> 2) & 0x7) {
 	case 0:
@@ -5878,13 +5886,15 @@ static void ibx_init_clock_gating(struct drm_device *dev)
 static void g4x_disable_trickle_feed(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
-	int pipe;
+	enum pipe pipe;
 
 	for_each_pipe(dev_priv, pipe) {
 		I915_WRITE(DSPCNTR(pipe),
 			   I915_READ(DSPCNTR(pipe)) |
 			   DISPPLANE_TRICKLE_FEED_DISABLE);
-		intel_flush_primary_plane(dev_priv, pipe);
+
+		I915_WRITE(DSPSURF(pipe), I915_READ(DSPSURF(pipe)));
+		POSTING_READ(DSPSURF(pipe));
 	}
 }
 
@@ -6913,6 +6923,7 @@ void intel_pm_setup(struct drm_device *dev)
 	struct drm_i915_private *dev_priv = dev->dev_private;
 
 	mutex_init(&dev_priv->rps.hw_lock);
+	spin_lock_init(&dev_priv->rps.client_lock);
 
 	INIT_DELAYED_WORK(&dev_priv->rps.delayed_resume_work,
 			  intel_gen6_powersave_work);
diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c
index 3800be4ad76b..1a45385f4d66 100644
--- a/drivers/gpu/drm/i915/intel_runtime_pm.c
+++ b/drivers/gpu/drm/i915/intel_runtime_pm.c
@@ -1233,18 +1233,6 @@ void intel_display_power_put(struct drm_i915_private *dev_priv,
 	BIT(POWER_DOMAIN_AUX_C) |		\
 	BIT(POWER_DOMAIN_INIT))
 
-#define CHV_PIPE_A_POWER_DOMAINS (	\
-	BIT(POWER_DOMAIN_PIPE_A) |	\
-	BIT(POWER_DOMAIN_INIT))
-
-#define CHV_PIPE_B_POWER_DOMAINS (	\
-	BIT(POWER_DOMAIN_PIPE_B) |	\
-	BIT(POWER_DOMAIN_INIT))
-
-#define CHV_PIPE_C_POWER_DOMAINS (	\
-	BIT(POWER_DOMAIN_PIPE_C) |	\
-	BIT(POWER_DOMAIN_INIT))
-
 #define CHV_DPIO_CMN_BC_POWER_DOMAINS (		\
 	BIT(POWER_DOMAIN_PORT_DDI_B_2_LANES) |	\
 	BIT(POWER_DOMAIN_PORT_DDI_B_4_LANES) |	\
@@ -1260,17 +1248,6 @@ void intel_display_power_put(struct drm_i915_private *dev_priv,
 	BIT(POWER_DOMAIN_AUX_D) |		\
 	BIT(POWER_DOMAIN_INIT))
 
-#define CHV_DPIO_TX_D_LANES_01_POWER_DOMAINS (	\
-	BIT(POWER_DOMAIN_PORT_DDI_D_2_LANES) |	\
-	BIT(POWER_DOMAIN_PORT_DDI_D_4_LANES) |	\
-	BIT(POWER_DOMAIN_AUX_D) |		\
-	BIT(POWER_DOMAIN_INIT))
-
-#define CHV_DPIO_TX_D_LANES_23_POWER_DOMAINS (	\
-	BIT(POWER_DOMAIN_PORT_DDI_D_4_LANES) |	\
-	BIT(POWER_DOMAIN_AUX_D) |		\
-	BIT(POWER_DOMAIN_INIT))
-
 static const struct i915_power_well_ops i9xx_always_on_power_well_ops = {
 	.sync_hw = i9xx_always_on_power_well_noop,
 	.enable = i9xx_always_on_power_well_noop,
@@ -1428,40 +1405,17 @@ static struct i915_power_well chv_power_wells[] = {
 		.domains = VLV_ALWAYS_ON_POWER_DOMAINS,
 		.ops = &i9xx_always_on_power_well_ops,
 	},
-#if 0
 	{
 		.name = "display",
-		.domains = VLV_DISPLAY_POWER_DOMAINS,
-		.data = PUNIT_POWER_WELL_DISP2D,
-		.ops = &vlv_display_power_well_ops,
-	},
-#endif
-	{
-		.name = "pipe-a",
 		/*
-		 * FIXME: pipe A power well seems to be the new disp2d well.
-		 * At least all registers seem to be housed there. Figure
-		 * out if this a a temporary situation in pre-production
-		 * hardware or a permanent state of affairs.
+		 * Pipe A power well is the new disp2d well. Pipe B and C
+		 * power wells don't actually exist. Pipe A power well is
+		 * required for any pipe to work.
 		 */
-		.domains = CHV_PIPE_A_POWER_DOMAINS | VLV_DISPLAY_POWER_DOMAINS,
+		.domains = VLV_DISPLAY_POWER_DOMAINS,
 		.data = PIPE_A,
 		.ops = &chv_pipe_power_well_ops,
 	},
-#if 0
-	{
-		.name = "pipe-b",
-		.domains = CHV_PIPE_B_POWER_DOMAINS,
-		.data = PIPE_B,
-		.ops = &chv_pipe_power_well_ops,
-	},
-	{
-		.name = "pipe-c",
-		.domains = CHV_PIPE_C_POWER_DOMAINS,
-		.data = PIPE_C,
-		.ops = &chv_pipe_power_well_ops,
-	},
-#endif
 	{
 		.name = "dpio-common-bc",
 		.domains = CHV_DPIO_CMN_BC_POWER_DOMAINS,
@@ -1474,50 +1428,6 @@ static struct i915_power_well chv_power_wells[] = {
 		.data = PUNIT_POWER_WELL_DPIO_CMN_D,
 		.ops = &chv_dpio_cmn_power_well_ops,
 	},
-#if 0
-	{
-		.name = "dpio-tx-b-01",
-		.domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS |
-			   VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS,
-		.ops = &vlv_dpio_power_well_ops,
-		.data = PUNIT_POWER_WELL_DPIO_TX_B_LANES_01,
-	},
-	{
-		.name = "dpio-tx-b-23",
-		.domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS |
-			   VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS,
-		.ops = &vlv_dpio_power_well_ops,
-		.data = PUNIT_POWER_WELL_DPIO_TX_B_LANES_23,
-	},
-	{
-		.name = "dpio-tx-c-01",
-		.domains = VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS |
-			   VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS,
-		.ops = &vlv_dpio_power_well_ops,
-		.data = PUNIT_POWER_WELL_DPIO_TX_C_LANES_01,
-	},
-	{
-		.name = "dpio-tx-c-23",
-		.domains = VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS |
-			   VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS,
-		.ops = &vlv_dpio_power_well_ops,
-		.data = PUNIT_POWER_WELL_DPIO_TX_C_LANES_23,
-	},
-	{
-		.name = "dpio-tx-d-01",
-		.domains = CHV_DPIO_TX_D_LANES_01_POWER_DOMAINS |
-			   CHV_DPIO_TX_D_LANES_23_POWER_DOMAINS,
-		.ops = &vlv_dpio_power_well_ops,
-		.data = PUNIT_POWER_WELL_DPIO_TX_D_LANES_01,
-	},
-	{
-		.name = "dpio-tx-d-23",
-		.domains = CHV_DPIO_TX_D_LANES_01_POWER_DOMAINS |
-			   CHV_DPIO_TX_D_LANES_23_POWER_DOMAINS,
-		.ops = &vlv_dpio_power_well_ops,
-		.data = PUNIT_POWER_WELL_DPIO_TX_D_LANES_23,
-	},
-#endif
 };
 
 static struct i915_power_well *lookup_power_well(struct drm_i915_private *dev_priv,
@@ -1724,6 +1634,8 @@ static void chv_phy_control_init(struct drm_i915_private *dev_priv)
 	 * value.
 	 */
 	dev_priv->chv_phy_control =
+		PHY_LDO_SEQ_DELAY(PHY_LDO_DELAY_600NS, DPIO_PHY0) |
+		PHY_LDO_SEQ_DELAY(PHY_LDO_DELAY_600NS, DPIO_PHY1) |
 		PHY_CH_POWER_MODE(PHY_CH_SU_PSR, DPIO_PHY0, DPIO_CH0) |
 		PHY_CH_POWER_MODE(PHY_CH_SU_PSR, DPIO_PHY0, DPIO_CH1) |
 		PHY_CH_POWER_MODE(PHY_CH_SU_PSR, DPIO_PHY1, DPIO_CH0);
diff --git a/drivers/gpu/drm/i915/intel_sideband.c b/drivers/gpu/drm/i915/intel_sideband.c
index 693ce8281970..8831fc579ade 100644
--- a/drivers/gpu/drm/i915/intel_sideband.c
+++ b/drivers/gpu/drm/i915/intel_sideband.c
@@ -49,7 +49,7 @@ static int vlv_sideband_rw(struct drm_i915_private *dev_priv, u32 devfn,
 		(port << IOSF_PORT_SHIFT) | (be << IOSF_BYTE_ENABLES_SHIFT) |
 		(bar << IOSF_BAR_SHIFT);
 
-	WARN_ON(!mutex_is_locked(&dev_priv->dpio_lock));
+	WARN_ON(!mutex_is_locked(&dev_priv->sb_lock));
 
 	if (wait_for((I915_READ(VLV_IOSF_DOORBELL_REQ) & IOSF_SB_BUSY) == 0, 5)) {
 		DRM_DEBUG_DRIVER("IOSF sideband idle wait (%s) timed out\n",
@@ -81,10 +81,10 @@ u32 vlv_punit_read(struct drm_i915_private *dev_priv, u32 addr)
 
 	WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
 
-	mutex_lock(&dev_priv->dpio_lock);
+	mutex_lock(&dev_priv->sb_lock);
 	vlv_sideband_rw(dev_priv, PCI_DEVFN(0, 0), IOSF_PORT_PUNIT,
 			SB_CRRDDA_NP, addr, &val);
-	mutex_unlock(&dev_priv->dpio_lock);
+	mutex_unlock(&dev_priv->sb_lock);
 
 	return val;
 }
@@ -93,10 +93,10 @@ void vlv_punit_write(struct drm_i915_private *dev_priv, u32 addr, u32 val)
 {
 	WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
 
-	mutex_lock(&dev_priv->dpio_lock);
+	mutex_lock(&dev_priv->sb_lock);
 	vlv_sideband_rw(dev_priv, PCI_DEVFN(0, 0), IOSF_PORT_PUNIT,
 			SB_CRWRDA_NP, addr, &val);
-	mutex_unlock(&dev_priv->dpio_lock);
+	mutex_unlock(&dev_priv->sb_lock);
 }
 
 u32 vlv_bunit_read(struct drm_i915_private *dev_priv, u32 reg)
@@ -121,10 +121,10 @@ u32 vlv_nc_read(struct drm_i915_private *dev_priv, u8 addr)
 
 	WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
 
-	mutex_lock(&dev_priv->dpio_lock);
+	mutex_lock(&dev_priv->sb_lock);
 	vlv_sideband_rw(dev_priv, PCI_DEVFN(0, 0), IOSF_PORT_NC,
 			SB_CRRDDA_NP, addr, &val);
-	mutex_unlock(&dev_priv->dpio_lock);
+	mutex_unlock(&dev_priv->sb_lock);
 
 	return val;
 }
@@ -213,7 +213,7 @@ u32 intel_sbi_read(struct drm_i915_private *dev_priv, u16 reg,
 		   enum intel_sbi_destination destination)
 {
 	u32 value = 0;
-	WARN_ON(!mutex_is_locked(&dev_priv->dpio_lock));
+	WARN_ON(!mutex_is_locked(&dev_priv->sb_lock));
 
 	if (wait_for((I915_READ(SBI_CTL_STAT) & SBI_BUSY) == 0,
 				100)) {
@@ -243,7 +243,7 @@ void intel_sbi_write(struct drm_i915_private *dev_priv, u16 reg, u32 value,
 {
 	u32 tmp;
 
-	WARN_ON(!mutex_is_locked(&dev_priv->dpio_lock));
+	WARN_ON(!mutex_is_locked(&dev_priv->sb_lock));
 
 	if (wait_for((I915_READ(SBI_CTL_STAT) & SBI_BUSY) == 0,
 				100)) {
diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
index 2a90308cc9c0..8193a35388d7 100644
--- a/drivers/gpu/drm/i915/intel_sprite.c
+++ b/drivers/gpu/drm/i915/intel_sprite.c
@@ -282,7 +282,6 @@ skl_disable_plane(struct drm_plane *dplane, struct drm_crtc *crtc, bool force)
 
 	I915_WRITE(PLANE_CTL(pipe, plane), 0);
 
-	/* Activate double buffered register update */
 	I915_WRITE(PLANE_SURF(pipe, plane), 0);
 	POSTING_READ(PLANE_SURF(pipe, plane));
 
@@ -339,7 +338,6 @@ vlv_update_plane(struct drm_plane *dplane, struct drm_crtc *crtc,
 	struct drm_device *dev = dplane->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct intel_plane *intel_plane = to_intel_plane(dplane);
-	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 	struct drm_i915_gem_object *obj = intel_fb_obj(fb);
 	int pipe = intel_plane->pipe;
 	int plane = intel_plane->plane;
@@ -453,8 +451,7 @@ vlv_update_plane(struct drm_plane *dplane, struct drm_crtc *crtc,
 	I915_WRITE(SPCNTR(pipe, plane), sprctl);
 	I915_WRITE(SPSURF(pipe, plane), i915_gem_obj_ggtt_offset(obj) +
 		   sprsurf_offset);
-
-	intel_flush_primary_plane(dev_priv, intel_crtc->plane);
+	POSTING_READ(SPSURF(pipe, plane));
 }
 
 static void
@@ -463,21 +460,17 @@ vlv_disable_plane(struct drm_plane *dplane, struct drm_crtc *crtc, bool force)
 	struct drm_device *dev = dplane->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct intel_plane *intel_plane = to_intel_plane(dplane);
-	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 	int pipe = intel_plane->pipe;
 	int plane = intel_plane->plane;
 
 	I915_WRITE(SPCNTR(pipe, plane), 0);
 
-	/* Activate double buffered register update */
 	I915_WRITE(SPSURF(pipe, plane), 0);
-
-	intel_flush_primary_plane(dev_priv, intel_crtc->plane);
+	POSTING_READ(SPSURF(pipe, plane));
 
 	intel_update_sprite_watermarks(dplane, crtc, 0, 0, 0, false, false);
 }
 
-
 static void
 ivb_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
 		 struct drm_framebuffer *fb,
@@ -489,7 +482,6 @@ ivb_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
 	struct drm_device *dev = plane->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct intel_plane *intel_plane = to_intel_plane(plane);
-	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 	struct drm_i915_gem_object *obj = intel_fb_obj(fb);
 	enum pipe pipe = intel_plane->pipe;
 	u32 sprctl, sprscale = 0;
@@ -599,8 +591,7 @@ ivb_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
 	I915_WRITE(SPRCTL(pipe), sprctl);
 	I915_WRITE(SPRSURF(pipe),
 		   i915_gem_obj_ggtt_offset(obj) + sprsurf_offset);
-
-	intel_flush_primary_plane(dev_priv, intel_crtc->plane);
+	POSTING_READ(SPRSURF(pipe));
 }
 
 static void
@@ -609,17 +600,15 @@ ivb_disable_plane(struct drm_plane *plane, struct drm_crtc *crtc, bool force)
 	struct drm_device *dev = plane->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct intel_plane *intel_plane = to_intel_plane(plane);
-	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 	int pipe = intel_plane->pipe;
 
 	I915_WRITE(SPRCTL(pipe), I915_READ(SPRCTL(pipe)) & ~SPRITE_ENABLE);
 	/* Can't leave the scaler enabled... */
 	if (intel_plane->can_scale)
 		I915_WRITE(SPRSCALE(pipe), 0);
-	/* Activate double buffered register update */
-	I915_WRITE(SPRSURF(pipe), 0);
 
-	intel_flush_primary_plane(dev_priv, intel_crtc->plane);
+	I915_WRITE(SPRSURF(pipe), 0);
+	POSTING_READ(SPRSURF(pipe));
 }
 
 static void
@@ -633,7 +622,6 @@ ilk_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
 	struct drm_device *dev = plane->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct intel_plane *intel_plane = to_intel_plane(plane);
-	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 	struct drm_i915_gem_object *obj = intel_fb_obj(fb);
 	int pipe = intel_plane->pipe;
 	unsigned long dvssurf_offset, linear_offset;
@@ -730,8 +718,7 @@ ilk_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
 	I915_WRITE(DVSCNTR(pipe), dvscntr);
 	I915_WRITE(DVSSURF(pipe),
 		   i915_gem_obj_ggtt_offset(obj) + dvssurf_offset);
-
-	intel_flush_primary_plane(dev_priv, intel_crtc->plane);
+	POSTING_READ(DVSSURF(pipe));
 }
 
 static void
@@ -740,17 +727,14 @@ ilk_disable_plane(struct drm_plane *plane, struct drm_crtc *crtc, bool force)
 	struct drm_device *dev = plane->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct intel_plane *intel_plane = to_intel_plane(plane);
-	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 	int pipe = intel_plane->pipe;
 
 	I915_WRITE(DVSCNTR(pipe), 0);
 	/* Disable the scaler */
 	I915_WRITE(DVSSCALE(pipe), 0);
 
-	/* Flush double buffered register updates */
 	I915_WRITE(DVSSURF(pipe), 0);
-
-	intel_flush_primary_plane(dev_priv, intel_crtc->plane);
+	POSTING_READ(DVSSURF(pipe));
 }
 
 static int
diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h
index 4851d660243c..6e1a2ed116cb 100644
--- a/include/uapi/drm/i915_drm.h
+++ b/include/uapi/drm/i915_drm.h
@@ -171,8 +171,12 @@ typedef struct _drm_i915_sarea {
 #define I915_BOX_TEXTURE_LOAD  0x8
 #define I915_BOX_LOST_CONTEXT  0x10
 
-/* I915 specific ioctls
- * The device specific ioctl range is 0x40 to 0x79.
+/*
+ * i915 specific ioctls.
+ *
+ * The device specific ioctl range is [DRM_COMMAND_BASE, DRM_COMMAND_END) ie
+ * [0x40, 0xa0) (a0 is excluded). The numbers below are defined as offset
+ * against DRM_COMMAND_BASE and should be between [0x0, 0x60).
  */
 #define DRM_I915_INIT		0x00
 #define DRM_I915_FLUSH		0x01