Merge branch 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6

* 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6:
  drm/i915: i915 cannot provide switcher services.
  drm/radeon/kms: fix vram base calculation on rs780/rs880
  drm/radeon/kms: fix formatting of vram and gtt info
  drm/radeon/kms: forbid big bo allocation (fdo 31708) v3
  drm: Don't try and disable an encoder that was never enabled
  drm: Add missing drm_vblank_put() along queue vblank error path
  drm/i915/dp: Only apply the workaround if the select is still active
  drm/i915: Emit a request to clear a flushed and idle ring for unbusy bo
  drm/i915/lvds: Always restore panel-fitter when enabling the LVDS
  drm/i915/ringbuffer: Only print an error on the second attempt to reset head
  drm/i915: announce to userspace that the bsd ring is coherent
  agp/intel: Fix wrong kunmap in i830_cleanup()
  drm/i915: Factor in pixel-repeat in FDI M/N calculation
  drm/i915: Death to the unnecessary 64bit divide
  drm/i915: Clean conflicting modesetting registers upon init
  drm/i915: Apply a workaround for transitioning from DP on pipe B to HDMI.
  drm/i915: Always set the DP transcoder config to 8BPC.

14 files changed, 208 insertions, 121 deletions

diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c
index 9272c38dd3c6..16a2847b7cdb 100644
--- a/drivers/char/agp/intel-gtt.c
+++ b/drivers/char/agp/intel-gtt.c
@@ -812,8 +812,10 @@ static int intel_fake_agp_fetch_size(void)
 
 static void i830_cleanup(void)
 {
-	kunmap(intel_private.i8xx_page);
-	intel_private.i8xx_flush_page = NULL;
+	if (intel_private.i8xx_flush_page) {
+		kunmap(intel_private.i8xx_flush_page);
+		intel_private.i8xx_flush_page = NULL;
+	}
 
 	__free_page(intel_private.i8xx_page);
 	intel_private.i8xx_page = NULL;
diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c
index 7ca59359fee2..bede10a03407 100644
--- a/drivers/gpu/drm/drm_crtc_helper.c
+++ b/drivers/gpu/drm/drm_crtc_helper.c
@@ -241,7 +241,7 @@ void drm_helper_disable_unused_functions(struct drm_device *dev)
 	}
 
 	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
-		if (!drm_helper_encoder_in_use(encoder)) {
+		if (encoder->crtc && !drm_helper_encoder_in_use(encoder)) {
 			drm_encoder_disable(encoder);
 			/* disconnector encoder from any connector */
 			encoder->crtc = NULL;
diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c
index 9d3a5030b6e1..722700d5d73e 100644
--- a/drivers/gpu/drm/drm_irq.c
+++ b/drivers/gpu/drm/drm_irq.c
@@ -585,10 +585,13 @@ static int drm_queue_vblank_event(struct drm_device *dev, int pipe,
 	struct timeval now;
 	unsigned long flags;
 	unsigned int seq;
+	int ret;
 
 	e = kzalloc(sizeof *e, GFP_KERNEL);
-	if (e == NULL)
-		return -ENOMEM;
+	if (e == NULL) {
+		ret = -ENOMEM;
+		goto err_put;
+	}
 
 	e->pipe = pipe;
 	e->base.pid = current->pid;
@@ -603,9 +606,8 @@ static int drm_queue_vblank_event(struct drm_device *dev, int pipe,
 	spin_lock_irqsave(&dev->event_lock, flags);
 
 	if (file_priv->event_space < sizeof e->event) {
-		spin_unlock_irqrestore(&dev->event_lock, flags);
-		kfree(e);
-		return -ENOMEM;
+		ret = -EBUSY;
+		goto err_unlock;
 	}
 
 	file_priv->event_space -= sizeof e->event;
@@ -638,6 +640,13 @@ static int drm_queue_vblank_event(struct drm_device *dev, int pipe,
 	spin_unlock_irqrestore(&dev->event_lock, flags);
 
 	return 0;
+
+err_unlock:
+	spin_unlock_irqrestore(&dev->event_lock, flags);
+	kfree(e);
+err_put:
+	drm_vblank_put(dev, e->pipe);
+	return ret;
 }
 
 /**
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index 7a26f4dd21ae..e6800819bca8 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -767,6 +767,9 @@ static int i915_getparam(struct drm_device *dev, void *data,
 	case I915_PARAM_HAS_BLT:
 		value = HAS_BLT(dev);
 		break;
+	case I915_PARAM_HAS_COHERENT_RINGS:
+		value = 1;
+		break;
 	default:
 		DRM_DEBUG_DRIVER("Unknown parameter %d\n",
 				 param->param);
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 5e54821af996..275ec6ed43ae 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -4374,10 +4374,20 @@ i915_gem_busy_ioctl(struct drm_device *dev, void *data,
 		 * use this buffer rather sooner than later, so issuing the required
 		 * flush earlier is beneficial.
 		 */
-		if (obj->write_domain & I915_GEM_GPU_DOMAINS)
+		if (obj->write_domain & I915_GEM_GPU_DOMAINS) {
 			i915_gem_flush_ring(dev, file_priv,
 					    obj_priv->ring,
 					    0, obj->write_domain);
+		} else if (obj_priv->ring->outstanding_lazy_request) {
+			/* This ring is not being cleared by active usage,
+			 * so emit a request to do so.
+			 */
+			u32 seqno = i915_add_request(dev,
+						     NULL, NULL,
+						     obj_priv->ring);
+			if (seqno == 0)
+				ret = -ENOMEM;
+		}
 
 		/* Update the active list for the hardware's current position.
 		 * Otherwise this only updates on a delayed timer or when irqs
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 25ed911a3112..878fc766a12c 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -3033,6 +3033,7 @@
 #define  TRANS_DP_10BPC		(1<<9)
 #define  TRANS_DP_6BPC		(2<<9)
 #define  TRANS_DP_12BPC		(3<<9)
+#define  TRANS_DP_BPC_MASK	(3<<9)
 #define  TRANS_DP_VSYNC_ACTIVE_HIGH	(1<<4)
 #define  TRANS_DP_VSYNC_ACTIVE_LOW	0
 #define  TRANS_DP_HSYNC_ACTIVE_HIGH	(1<<3)
diff --git a/drivers/gpu/drm/i915/intel_acpi.c b/drivers/gpu/drm/i915/intel_acpi.c
index 65c88f9ba12c..2cb8e0b9f1ee 100644
--- a/drivers/gpu/drm/i915/intel_acpi.c
+++ b/drivers/gpu/drm/i915/intel_acpi.c
@@ -190,37 +190,6 @@ out:
 	kfree(output.pointer);
 }
 
-static int intel_dsm_switchto(enum vga_switcheroo_client_id id)
-{
-	return 0;
-}
-
-static int intel_dsm_power_state(enum vga_switcheroo_client_id id,
-				 enum vga_switcheroo_state state)
-{
-	return 0;
-}
-
-static int intel_dsm_init(void)
-{
-	return 0;
-}
-
-static int intel_dsm_get_client_id(struct pci_dev *pdev)
-{
-	if (intel_dsm_priv.dhandle == DEVICE_ACPI_HANDLE(&pdev->dev))
-		return VGA_SWITCHEROO_IGD;
-	else
-		return VGA_SWITCHEROO_DIS;
-}
-
-static struct vga_switcheroo_handler intel_dsm_handler = {
-	.switchto = intel_dsm_switchto,
-	.power_state = intel_dsm_power_state,
-	.init = intel_dsm_init,
-	.get_client_id = intel_dsm_get_client_id,
-};
-
 static bool intel_dsm_pci_probe(struct pci_dev *pdev)
 {
 	acpi_handle dhandle, intel_handle;
@@ -276,11 +245,8 @@ void intel_register_dsm_handler(void)
 {
 	if (!intel_dsm_detect())
 		return;
-
-	vga_switcheroo_register_handler(&intel_dsm_handler);
 }
 
 void intel_unregister_dsm_handler(void)
 {
-	vga_switcheroo_unregister_handler();
 }
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 255b52ee0091..d9b7092439ef 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2120,9 +2120,11 @@ static void ironlake_crtc_enable(struct drm_crtc *crtc)
 		reg = TRANS_DP_CTL(pipe);
 		temp = I915_READ(reg);
 		temp &= ~(TRANS_DP_PORT_SEL_MASK |
-			  TRANS_DP_SYNC_MASK);
+			  TRANS_DP_SYNC_MASK |
+			  TRANS_DP_BPC_MASK);
 		temp |= (TRANS_DP_OUTPUT_ENABLE |
 			 TRANS_DP_ENH_FRAMING);
+		temp |= TRANS_DP_8BPC;
 
 		if (crtc->mode.flags & DRM_MODE_FLAG_PHSYNC)
 			temp |= TRANS_DP_HSYNC_ACTIVE_HIGH;
@@ -2712,27 +2714,19 @@ fdi_reduce_ratio(u32 *num, u32 *den)
 	}
 }
 
-#define DATA_N 0x800000
-#define LINK_N 0x80000
-
 static void
 ironlake_compute_m_n(int bits_per_pixel, int nlanes, int pixel_clock,
 		     int link_clock, struct fdi_m_n *m_n)
 {
-	u64 temp;
-
 	m_n->tu = 64; /* default size */
 
-	temp = (u64) DATA_N * pixel_clock;
-	temp = div_u64(temp, link_clock);
-	m_n->gmch_m = div_u64(temp * bits_per_pixel, nlanes);
-	m_n->gmch_m >>= 3; /* convert to bytes_per_pixel */
-	m_n->gmch_n = DATA_N;
+	/* BUG_ON(pixel_clock > INT_MAX / 36); */
+	m_n->gmch_m = bits_per_pixel * pixel_clock;
+	m_n->gmch_n = link_clock * nlanes * 8;
 	fdi_reduce_ratio(&m_n->gmch_m, &m_n->gmch_n);
 
-	temp = (u64) LINK_N * pixel_clock;
-	m_n->link_m = div_u64(temp, link_clock);
-	m_n->link_n = LINK_N;
+	m_n->link_m = pixel_clock;
+	m_n->link_n = link_clock;
 	fdi_reduce_ratio(&m_n->link_m, &m_n->link_n);
 }
 
@@ -3716,6 +3710,7 @@ static int intel_crtc_mode_set(struct drm_crtc *crtc,
 
 	/* FDI link */
 	if (HAS_PCH_SPLIT(dev)) {
+		int pixel_multiplier = intel_mode_get_pixel_multiplier(adjusted_mode);
 		int lane = 0, link_bw, bpp;
 		/* CPU eDP doesn't require FDI link, so just set DP M/N
 		   according to current link config */
@@ -3799,6 +3794,8 @@ static int intel_crtc_mode_set(struct drm_crtc *crtc,
 
 		intel_crtc->fdi_lanes = lane;
 
+		if (pixel_multiplier > 1)
+			link_bw *= pixel_multiplier;
 		ironlake_compute_m_n(bpp, lane, target_clock, link_bw, &m_n);
 	}
 
@@ -5236,6 +5233,55 @@ static const struct drm_crtc_funcs intel_crtc_funcs = {
 	.page_flip = intel_crtc_page_flip,
 };
 
+static void intel_sanitize_modesetting(struct drm_device *dev,
+				       int pipe, int plane)
+{
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	u32 reg, val;
+
+	if (HAS_PCH_SPLIT(dev))
+		return;
+
+	/* Who knows what state these registers were left in by the BIOS or
+	 * grub?
+	 *
+	 * If we leave the registers in a conflicting state (e.g. with the
+	 * display plane reading from the other pipe than the one we intend
+	 * to use) then when we attempt to teardown the active mode, we will
+	 * not disable the pipes and planes in the correct order -- leaving
+	 * a plane reading from a disabled pipe and possibly leading to
+	 * undefined behaviour.
+	 */
+
+	reg = DSPCNTR(plane);
+	val = I915_READ(reg);
+
+	if ((val & DISPLAY_PLANE_ENABLE) == 0)
+		return;
+	if (!!(val & DISPPLANE_SEL_PIPE_MASK) == pipe)
+		return;
+
+	/* This display plane is active and attached to the other CPU pipe. */
+	pipe = !pipe;
+
+	/* Disable the plane and wait for it to stop reading from the pipe. */
+	I915_WRITE(reg, val & ~DISPLAY_PLANE_ENABLE);
+	intel_flush_display_plane(dev, plane);
+
+	if (IS_GEN2(dev))
+		intel_wait_for_vblank(dev, pipe);
+
+	if (pipe == 0 && (dev_priv->quirks & QUIRK_PIPEA_FORCE))
+		return;
+
+	/* Switch off the pipe. */
+	reg = PIPECONF(pipe);
+	val = I915_READ(reg);
+	if (val & PIPECONF_ENABLE) {
+		I915_WRITE(reg, val & ~PIPECONF_ENABLE);
+		intel_wait_for_pipe_off(dev, pipe);
+	}
+}
 
 static void intel_crtc_init(struct drm_device *dev, int pipe)
 {
@@ -5287,6 +5333,8 @@ static void intel_crtc_init(struct drm_device *dev, int pipe)
 
 	setup_timer(&intel_crtc->idle_timer, intel_crtc_idle_timer,
 		    (unsigned long)intel_crtc);
+
+	intel_sanitize_modesetting(dev, intel_crtc->pipe, intel_crtc->plane);
 }
 
 int intel_get_pipe_from_crtc_id(struct drm_device *dev, void *data,
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 300f64b4238b..df648cb4c296 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1376,6 +1376,9 @@ intel_dp_link_down(struct intel_dp *intel_dp)
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	uint32_t DP = intel_dp->DP;
 
+	if ((I915_READ(intel_dp->output_reg) & DP_PORT_EN) == 0)
+		return;
+
 	DRM_DEBUG_KMS("\n");
 
 	if (is_edp(intel_dp)) {
@@ -1398,6 +1401,28 @@ intel_dp_link_down(struct intel_dp *intel_dp)
 
 	if (is_edp(intel_dp))
 		DP |= DP_LINK_TRAIN_OFF;
+
+	if (!HAS_PCH_CPT(dev) &&
+	    I915_READ(intel_dp->output_reg) & DP_PIPEB_SELECT) {
+		struct intel_crtc *intel_crtc = to_intel_crtc(intel_dp->base.base.crtc);
+		/* Hardware workaround: leaving our transcoder select
+		 * set to transcoder B while it's off will prevent the
+		 * corresponding HDMI output on transcoder A.
+		 *
+		 * Combine this with another hardware workaround:
+		 * transcoder select bit can only be cleared while the
+		 * port is enabled.
+		 */
+		DP &= ~DP_PIPEB_SELECT;
+		I915_WRITE(intel_dp->output_reg, DP);
+
+		/* Changes to enable or select take place the vblank
+		 * after being written.
+		 */
+		intel_wait_for_vblank(intel_dp->base.base.dev,
+				      intel_crtc->pipe);
+	}
+
 	I915_WRITE(intel_dp->output_reg, DP & ~DP_PORT_EN);
 	POSTING_READ(intel_dp->output_reg);
 }
diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
index f79327fc6653..25bcedf386fd 100644
--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -68,7 +68,7 @@ static struct intel_lvds *intel_attached_lvds(struct drm_connector *connector)
 /**
  * Sets the power state for the panel.
  */
-static void intel_lvds_set_power(struct intel_lvds *intel_lvds, bool on)
+static void intel_lvds_enable(struct intel_lvds *intel_lvds)
 {
 	struct drm_device *dev = intel_lvds->base.base.dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
@@ -82,26 +82,61 @@ static void intel_lvds_set_power(struct intel_lvds *intel_lvds, bool on)
 		lvds_reg = LVDS;
 	}
 
-	if (on) {
-		I915_WRITE(lvds_reg, I915_READ(lvds_reg) | LVDS_PORT_EN);
-		I915_WRITE(ctl_reg, I915_READ(ctl_reg) | POWER_TARGET_ON);
-		intel_panel_set_backlight(dev, dev_priv->backlight_level);
-	} else {
-		dev_priv->backlight_level = intel_panel_get_backlight(dev);
-
-		intel_panel_set_backlight(dev, 0);
-		I915_WRITE(ctl_reg, I915_READ(ctl_reg) & ~POWER_TARGET_ON);
+	I915_WRITE(lvds_reg, I915_READ(lvds_reg) | LVDS_PORT_EN);
 
-		if (intel_lvds->pfit_control) {
-			if (wait_for((I915_READ(PP_STATUS) & PP_ON) == 0, 1000))
-				DRM_ERROR("timed out waiting for panel to power off\n");
-			I915_WRITE(PFIT_CONTROL, 0);
-			intel_lvds->pfit_control = 0;
+	if (intel_lvds->pfit_dirty) {
+		/*
+		 * Enable automatic panel scaling so that non-native modes
+		 * fill the screen.  The panel fitter should only be
+		 * adjusted whilst the pipe is disabled, according to
+		 * register description and PRM.
+		 */
+		DRM_DEBUG_KMS("applying panel-fitter: %x, %x\n",
+			      intel_lvds->pfit_control,
+			      intel_lvds->pfit_pgm_ratios);
+		if (wait_for((I915_READ(PP_STATUS) & PP_ON) == 0, 1000)) {
+			DRM_ERROR("timed out waiting for panel to power off\n");
+		} else {
+			I915_WRITE(PFIT_PGM_RATIOS, intel_lvds->pfit_pgm_ratios);
+			I915_WRITE(PFIT_CONTROL, intel_lvds->pfit_control);
 			intel_lvds->pfit_dirty = false;
 		}
+	}
+
+	I915_WRITE(ctl_reg, I915_READ(ctl_reg) | POWER_TARGET_ON);
+	POSTING_READ(lvds_reg);
+
+	intel_panel_set_backlight(dev, dev_priv->backlight_level);
+}
 
-		I915_WRITE(lvds_reg, I915_READ(lvds_reg) & ~LVDS_PORT_EN);
+static void intel_lvds_disable(struct intel_lvds *intel_lvds)
+{
+	struct drm_device *dev = intel_lvds->base.base.dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	u32 ctl_reg, lvds_reg;
+
+	if (HAS_PCH_SPLIT(dev)) {
+		ctl_reg = PCH_PP_CONTROL;
+		lvds_reg = PCH_LVDS;
+	} else {
+		ctl_reg = PP_CONTROL;
+		lvds_reg = LVDS;
+	}
+
+	dev_priv->backlight_level = intel_panel_get_backlight(dev);
+	intel_panel_set_backlight(dev, 0);
+
+	I915_WRITE(ctl_reg, I915_READ(ctl_reg) & ~POWER_TARGET_ON);
+
+	if (intel_lvds->pfit_control) {
+		if (wait_for((I915_READ(PP_STATUS) & PP_ON) == 0, 1000))
+			DRM_ERROR("timed out waiting for panel to power off\n");
+
+		I915_WRITE(PFIT_CONTROL, 0);
+		intel_lvds->pfit_dirty = true;
 	}
+
+	I915_WRITE(lvds_reg, I915_READ(lvds_reg) & ~LVDS_PORT_EN);
 	POSTING_READ(lvds_reg);
 }
 
@@ -110,9 +145,9 @@ static void intel_lvds_dpms(struct drm_encoder *encoder, int mode)
 	struct intel_lvds *intel_lvds = to_intel_lvds(encoder);
 
 	if (mode == DRM_MODE_DPMS_ON)
-		intel_lvds_set_power(intel_lvds, true);
+		intel_lvds_enable(intel_lvds);
 	else
-		intel_lvds_set_power(intel_lvds, false);
+		intel_lvds_disable(intel_lvds);
 
 	/* XXX: We never power down the LVDS pairs. */
 }
@@ -411,43 +446,18 @@ static void intel_lvds_commit(struct drm_encoder *encoder)
 	/* Always do a full power on as we do not know what state
 	 * we were left in.
 	 */
-	intel_lvds_set_power(intel_lvds, true);
+	intel_lvds_enable(intel_lvds);
 }
 
 static void intel_lvds_mode_set(struct drm_encoder *encoder,
 				struct drm_display_mode *mode,
 				struct drm_display_mode *adjusted_mode)
 {
-	struct drm_device *dev = encoder->dev;
-	struct drm_i915_private *dev_priv = dev->dev_private;
-	struct intel_lvds *intel_lvds = to_intel_lvds(encoder);
-
 	/*
 	 * The LVDS pin pair will already have been turned on in the
 	 * intel_crtc_mode_set since it has a large impact on the DPLL
 	 * settings.
 	 */
-
-	if (HAS_PCH_SPLIT(dev))
-		return;
-
-	if (!intel_lvds->pfit_dirty)
-		return;
-
-	/*
-	 * Enable automatic panel scaling so that non-native modes fill the
-	 * screen.  Should be enabled before the pipe is enabled, according to
-	 * register description and PRM.
-	 */
-	DRM_DEBUG_KMS("applying panel-fitter: %x, %x\n",
-		      intel_lvds->pfit_control,
-		      intel_lvds->pfit_pgm_ratios);
-	if (wait_for((I915_READ(PP_STATUS) & PP_ON) == 0, 1000))
-		DRM_ERROR("timed out waiting for panel to power off\n");
-
-	I915_WRITE(PFIT_PGM_RATIOS, intel_lvds->pfit_pgm_ratios);
-	I915_WRITE(PFIT_CONTROL, intel_lvds->pfit_control);
-	intel_lvds->pfit_dirty = false;
 }
 
 /**
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index b83306f9244b..89a65be8a3f3 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -156,23 +156,25 @@ static int init_ring_common(struct drm_device *dev,
 
 	/* G45 ring initialization fails to reset head to zero */
 	if (head != 0) {
-		DRM_ERROR("%s head not reset to zero "
-				"ctl %08x head %08x tail %08x start %08x\n",
-				ring->name,
-				I915_READ_CTL(ring),
-				I915_READ_HEAD(ring),
-				I915_READ_TAIL(ring),
-				I915_READ_START(ring));
+		DRM_DEBUG_KMS("%s head not reset to zero "
+			      "ctl %08x head %08x tail %08x start %08x\n",
+			      ring->name,
+			      I915_READ_CTL(ring),
+			      I915_READ_HEAD(ring),
+			      I915_READ_TAIL(ring),
+			      I915_READ_START(ring));
 
 		I915_WRITE_HEAD(ring, 0);
 
-		DRM_ERROR("%s head forced to zero "
-				"ctl %08x head %08x tail %08x start %08x\n",
-				ring->name,
-				I915_READ_CTL(ring),
-				I915_READ_HEAD(ring),
-				I915_READ_TAIL(ring),
-				I915_READ_START(ring));
+		if (I915_READ_HEAD(ring) & HEAD_ADDR) {
+			DRM_ERROR("failed to set %s head to zero "
+				  "ctl %08x head %08x tail %08x start %08x\n",
+				  ring->name,
+				  I915_READ_CTL(ring),
+				  I915_READ_HEAD(ring),
+				  I915_READ_TAIL(ring),
+				  I915_READ_START(ring));
+		}
 	}
 
 	I915_WRITE_CTL(ring,
diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index a3552594ccc4..a322d4f647bd 100644
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -1195,8 +1195,10 @@ void r600_vram_gtt_location(struct radeon_device *rdev, struct radeon_mc *mc)
 				mc->vram_end, mc->real_vram_size >> 20);
 	} else {
 		u64 base = 0;
-		if (rdev->flags & RADEON_IS_IGP)
-			base = (RREG32(MC_VM_FB_LOCATION) & 0xFFFF) << 24;
+		if (rdev->flags & RADEON_IS_IGP) {
+			base = RREG32(MC_VM_FB_LOCATION) & 0xFFFF;
+			base <<= 24;
+		}
 		radeon_vram_location(rdev, &rdev->mc, base);
 		rdev->mc.gtt_base_align = 0;
 		radeon_gtt_location(rdev, mc);
diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index d8ac1849180d..e12e79326cb1 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -286,7 +286,7 @@ void radeon_vram_location(struct radeon_device *rdev, struct radeon_mc *mc, u64
 		mc->mc_vram_size = mc->aper_size;
 	}
 	mc->vram_end = mc->vram_start + mc->mc_vram_size - 1;
-	dev_info(rdev->dev, "VRAM: %lluM 0x%08llX - 0x%08llX (%lluM used)\n",
+	dev_info(rdev->dev, "VRAM: %lluM 0x%016llX - 0x%016llX (%lluM used)\n",
 			mc->mc_vram_size >> 20, mc->vram_start,
 			mc->vram_end, mc->real_vram_size >> 20);
 }
@@ -323,7 +323,7 @@ void radeon_gtt_location(struct radeon_device *rdev, struct radeon_mc *mc)
 		mc->gtt_start = (mc->vram_end + 1 + mc->gtt_base_align) & ~mc->gtt_base_align;
 	}
 	mc->gtt_end = mc->gtt_start + mc->gtt_size - 1;
-	dev_info(rdev->dev, "GTT: %lluM 0x%08llX - 0x%08llX\n",
+	dev_info(rdev->dev, "GTT: %lluM 0x%016llX - 0x%016llX\n",
 			mc->gtt_size >> 20, mc->gtt_start, mc->gtt_end);
 }
 
diff --git a/drivers/gpu/drm/radeon/radeon_object.c b/drivers/gpu/drm/radeon/radeon_object.c
index 1d067743fee0..a598d0049aa5 100644
--- a/drivers/gpu/drm/radeon/radeon_object.c
+++ b/drivers/gpu/drm/radeon/radeon_object.c
@@ -69,7 +69,7 @@ void radeon_ttm_placement_from_domain(struct radeon_bo *rbo, u32 domain)
 	u32 c = 0;
 
 	rbo->placement.fpfn = 0;
-	rbo->placement.lpfn = rbo->rdev->mc.active_vram_size >> PAGE_SHIFT;
+	rbo->placement.lpfn = 0;
 	rbo->placement.placement = rbo->placements;
 	rbo->placement.busy_placement = rbo->placements;
 	if (domain & RADEON_GEM_DOMAIN_VRAM)
@@ -91,7 +91,8 @@ int radeon_bo_create(struct radeon_device *rdev, struct drm_gem_object *gobj,
 {
 	struct radeon_bo *bo;
 	enum ttm_bo_type type;
-	int page_align = roundup(byte_align, PAGE_SIZE) >> PAGE_SHIFT;
+	unsigned long page_align = roundup(byte_align, PAGE_SIZE) >> PAGE_SHIFT;
+	unsigned long max_size = 0;
 	int r;
 
 	if (unlikely(rdev->mman.bdev.dev_mapping == NULL)) {
@@ -104,6 +105,14 @@ int radeon_bo_create(struct radeon_device *rdev, struct drm_gem_object *gobj,
 	}
 	*bo_ptr = NULL;
 
+	/* maximun bo size is the minimun btw visible vram and gtt size */
+	max_size = min(rdev->mc.visible_vram_size, rdev->mc.gtt_size);
+	if ((page_align << PAGE_SHIFT) >= max_size) {
+		printk(KERN_WARNING "%s:%d alloc size %ldM bigger than %ldMb limit\n",
+			__func__, __LINE__, page_align  >> (20 - PAGE_SHIFT), max_size >> 20);
+		return -ENOMEM;
+	}
+
 retry:
 	bo = kzalloc(sizeof(struct radeon_bo), GFP_KERNEL);
 	if (bo == NULL)