Attachment 28589 Details for Bug 20901 – patch for kernel

[patch] patch for kernel

drmmode_overlay.patch (text/plain), 55.85 KB, created by Daniel Vetter on 2009-08-13 03:47:33 UTC

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Creator: Daniel Vetter

Created: 2009-08-13 03:47:33 UTC

Size: 55.85 KB

patch

obsolete

>diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
>index 33be210..addb09d 100644
>--- a/drivers/gpu/drm/drm_crtc.c
>+++ b/drivers/gpu/drm/drm_crtc.c
>@@ -243,7 +243,8 @@ static void drm_mode_object_put(struct drm_device *dev,
> 	mutex_unlock(&dev->mode_config.idr_mutex);
> }
> 
>-void *drm_mode_object_find(struct drm_device *dev, uint32_t id, uint32_t type)
>+struct drm_mode_object *drm_mode_object_find(struct drm_device *dev,
>+		uint32_t id, uint32_t type)
> {
> 	struct drm_mode_object *obj = NULL;
> 
>diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c
>index 6aaa2cb..2d837a5 100644
>--- a/drivers/gpu/drm/drm_crtc_helper.c
>+++ b/drivers/gpu/drm/drm_crtc_helper.c
>@@ -511,7 +511,7 @@ static void drm_setup_crtcs(struct drm_device *dev)
>  *
>  * Return false if @encoder can't be driven by @crtc, true otherwise.
>  */
>-static bool drm_encoder_crtc_ok(struct drm_encoder *encoder,
>+bool drm_encoder_crtc_ok(struct drm_encoder *encoder,
> 				struct drm_crtc *crtc)
> {
> 	struct drm_device *dev;
>@@ -532,6 +532,7 @@ static bool drm_encoder_crtc_ok(struct drm_encoder *encoder,
> 		return true;
> 	return false;
> }
>+EXPORT_SYMBOL(drm_encoder_crtc_ok);
> 
> /*
>  * Check the CRTC we're going to map each output to vs. its current
>diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
>index 30d6b99..d06fece 100644
>--- a/drivers/gpu/drm/i915/Makefile
>+++ b/drivers/gpu/drm/i915/Makefile
>@@ -22,6 +22,7 @@ i915-y := i915_drv.o i915_dma.o i915_irq.o i915_mem.o \
> 	  intel_fb.o \
> 	  intel_tv.o \
> 	  intel_dvo.o \
>+	  intel_overlay.o \
> 	  dvo_ch7xxx.o \
> 	  dvo_ch7017.o \
> 	  dvo_ivch.o \
>diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
>index 50d1f78..7763967 100644
>--- a/drivers/gpu/drm/i915/i915_dma.c
>+++ b/drivers/gpu/drm/i915/i915_dma.c
>@@ -777,6 +777,9 @@ static int i915_getparam(struct drm_device *dev, void *data,
> 	case I915_PARAM_NUM_FENCES_AVAIL:
> 		value = dev_priv->num_fence_regs - dev_priv->fence_reg_start;
> 		break;
>+	case I915_PARAM_HAS_OVERLAY:
>+		value = dev_priv->overlay ? 1 : 0;
>+		break;
> 	default:
> 		DRM_DEBUG_DRIVER(I915_DRV, "Unknown parameter %d\n",
> 					param->param);
>@@ -1310,6 +1313,8 @@ int i915_driver_unload(struct drm_device *dev)
> 		mutex_unlock(&dev->struct_mutex);
> 		drm_mm_takedown(&dev_priv->vram);
> 		i915_gem_lastclose(dev);
>+
>+		intel_cleanup_overlay(dev);
> 	}
> 
> 	kfree(dev->dev_private);
>@@ -1416,6 +1421,8 @@ struct drm_ioctl_desc i915_ioctls[] = {
> 	DRM_IOCTL_DEF(DRM_I915_GEM_GET_TILING, i915_gem_get_tiling, 0),
> 	DRM_IOCTL_DEF(DRM_I915_GEM_GET_APERTURE, i915_gem_get_aperture_ioctl, 0),
> 	DRM_IOCTL_DEF(DRM_I915_GET_PIPE_FROM_CRTC_ID, intel_get_pipe_from_crtc_id, 0),
>+	DRM_IOCTL_DEF(DRM_I915_OVERLAY_PUT_IMAGE, intel_overlay_put_image, DRM_MASTER|DRM_CONTROL_ALLOW),
>+	DRM_IOCTL_DEF(DRM_I915_OVERLAY_ATTRS, intel_overlay_attrs, DRM_MASTER|DRM_CONTROL_ALLOW),
> };
> 
> int i915_max_ioctl = DRM_ARRAY_SIZE(i915_ioctls);
>diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
>index 7537f57..19dd7c3 100644
>--- a/drivers/gpu/drm/i915/i915_drv.h
>+++ b/drivers/gpu/drm/i915/i915_drv.h
>@@ -149,6 +149,7 @@ struct drm_i915_error_state {
> 	struct timeval time;
> };
> 
>+struct intel_overlay;
> typedef struct drm_i915_private {
> 	struct drm_device *dev;
> 
>@@ -206,6 +207,9 @@ typedef struct drm_i915_private {
> 
> 	struct intel_opregion opregion;
> 
>+	/* overlay */
>+	struct intel_overlay *overlay;
>+
> 	/* LVDS info */
> 	int backlight_duty_cycle;  /* restore backlight to this value */
> 	bool panel_wants_dither;
>@@ -692,6 +696,7 @@ void i915_gem_cleanup_ringbuffer(struct drm_device *dev);
> int i915_gem_do_init(struct drm_device *dev, unsigned long start,
> 		     unsigned long end);
> int i915_gem_idle(struct drm_device *dev);
>+int i915_lp_ring_sync(struct drm_device *dev);
> int i915_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf);
> int i915_gem_object_set_to_gtt_domain(struct drm_gem_object *obj,
> 				      int write);
>diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
>index 140bee1..6f1b5f9 100644
>--- a/drivers/gpu/drm/i915/i915_gem.c
>+++ b/drivers/gpu/drm/i915/i915_gem.c
>@@ -1723,12 +1723,8 @@ i915_gem_retire_work_handler(struct work_struct *work)
> 	mutex_unlock(&dev->struct_mutex);
> }
> 
>-/**
>- * Waits for a sequence number to be signaled, and cleans up the
>- * request and object lists appropriately for that event.
>- */
> static int
>-i915_wait_request(struct drm_device *dev, uint32_t seqno)
>+i915_do_wait_request(struct drm_device *dev, uint32_t seqno, int interruptible)
> {
> 	drm_i915_private_t *dev_priv = dev->dev_private;
> 	u32 ier;
>@@ -1750,10 +1746,17 @@ i915_wait_request(struct drm_device *dev, uint32_t seqno)
> 
> 		dev_priv->mm.waiting_gem_seqno = seqno;
> 		i915_user_irq_get(dev);
>-		ret = wait_event_interruptible(dev_priv->irq_queue,
>-					       i915_seqno_passed(i915_get_gem_seqno(dev),
>-								 seqno) ||
>-					       dev_priv->mm.wedged);
>+		if (interruptible)
>+			ret = wait_event_interruptible(dev_priv->irq_queue,
>+				       i915_seqno_passed(i915_get_gem_seqno(dev),
>+							 seqno) ||
>+				       dev_priv->mm.wedged);
>+		else
>+			wait_event(dev_priv->irq_queue,
>+				       i915_seqno_passed(i915_get_gem_seqno(dev),
>+							 seqno) ||
>+				       dev_priv->mm.wedged);
>+
> 		i915_user_irq_put(dev);
> 		dev_priv->mm.waiting_gem_seqno = 0;
> 	}
>@@ -1775,6 +1778,34 @@ i915_wait_request(struct drm_device *dev, uint32_t seqno)
> 	return ret;
> }
> 
>+/**
>+ * Waits for a sequence number to be signaled, and cleans up the
>+ * request and object lists appropriately for that event.
>+ */
>+static int
>+i915_wait_request(struct drm_device *dev, uint32_t seqno)
>+{
>+	return i915_do_wait_request(dev, seqno, 1);
>+}
>+
>+/**
>+ * Waits for the ring to finish up to the latest request. Usefull for waiting
>+ * for flip events, e.g for the overlay support. */
>+int i915_lp_ring_sync(struct drm_device *dev)
>+{
>+	uint32_t seqno;
>+	int ret;
>+
>+	seqno = i915_add_request(dev, NULL, 0);
>+
>+	if (seqno == 0)
>+		return -ENOMEM;
>+
>+	ret = i915_do_wait_request(dev, seqno, 0);
>+	BUG_ON(ret == -ERESTARTSYS);
>+	return ret;
>+}
>+
> static void
> i915_gem_flush(struct drm_device *dev,
> 	       uint32_t invalidate_domains,
>@@ -1841,7 +1872,7 @@ i915_gem_flush(struct drm_device *dev,
> #endif
> 		BEGIN_LP_RING(2);
> 		OUT_RING(cmd);
>-		OUT_RING(0); /* noop */
>+		OUT_RING(MI_NOOP);
> 		ADVANCE_LP_RING();
> 	}
> }
>diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
>index 2955083..7bb6e88 100644
>--- a/drivers/gpu/drm/i915/i915_reg.h
>+++ b/drivers/gpu/drm/i915/i915_reg.h
>@@ -116,6 +116,7 @@
> #define MI_NOOP			MI_INSTR(0, 0)
> #define MI_USER_INTERRUPT	MI_INSTR(0x02, 0)
> #define MI_WAIT_FOR_EVENT       MI_INSTR(0x03, 0)
>+#define   MI_WAIT_FOR_OVERLAY_FLIP	(1<<16)
> #define   MI_WAIT_FOR_PLANE_B_FLIP      (1<<6)
> #define   MI_WAIT_FOR_PLANE_A_FLIP      (1<<2)
> #define   MI_WAIT_FOR_PLANE_A_SCANLINES (1<<1)
>@@ -127,6 +128,10 @@
> #define   MI_END_SCENE		(1 << 4) /* flush binner and incr scene count */
> #define MI_BATCH_BUFFER_END	MI_INSTR(0x0a, 0)
> #define MI_REPORT_HEAD		MI_INSTR(0x07, 0)
>+#define MI_OVERLAY_FLIP		MI_INSTR(0x11,0)
>+#define   MI_OVERLAY_CONTINUE	(0x0<<21)
>+#define   MI_OVERLAY_ON		(0x1<<21)
>+#define   MI_OVERLAY_OFF	(0x2<<21)
> #define MI_LOAD_SCAN_LINES_INCL MI_INSTR(0x12, 0)
> #define MI_STORE_DWORD_IMM	MI_INSTR(0x20, 1)
> #define   MI_MEM_VIRTUAL	(1 << 22) /* 965+ only */
>diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
>index d6fce21..d2ddcbd 100644
>--- a/drivers/gpu/drm/i915/intel_display.c
>+++ b/drivers/gpu/drm/i915/intel_display.c
>@@ -1463,6 +1463,22 @@ static void igdng_crtc_dpms(struct drm_crtc *crtc, int mode)
> 	}
> }
> 
>+static void intel_crtc_dpms_overlay(struct intel_crtc *intel_crtc, bool enable)
>+{
>+	struct intel_overlay *overlay;
>+
>+	if (!enable && intel_crtc->overlay) {
>+		overlay = intel_crtc->overlay;
>+		mutex_lock(&overlay->dev->struct_mutex);
>+		intel_overlay_switch_off(overlay);
>+		mutex_unlock(&overlay->dev->struct_mutex);
>+	}
>+	/* Let userspace switch the overlay on again. In most cases userspace
>+	 * has to recompute where to put it anyway. */
>+
>+	return;
>+}
>+
> static void i9xx_crtc_dpms(struct drm_crtc *crtc, int mode)
> {
> 	struct drm_device *dev = crtc->dev;
>@@ -1515,13 +1531,15 @@ static void i9xx_crtc_dpms(struct drm_crtc *crtc, int mode)
> 		intel_crtc_load_lut(crtc);
> 
> 		/* Give the overlay scaler a chance to enable if it's on this pipe */
>-		//intel_crtc_dpms_video(crtc, true); TODO
>+		intel_crtc_dpms_overlay(intel_crtc, true);
>+
> 		intel_update_watermarks(dev);
> 	break;
> 	case DRM_MODE_DPMS_OFF:
> 		intel_update_watermarks(dev);
>+
> 		/* Give the overlay scaler a chance to disable if it's on this pipe */
>-		//intel_crtc_dpms_video(crtc, FALSE); TODO
>+		intel_crtc_dpms_overlay(intel_crtc, false);
> 
> 		/* Disable the VGA plane that we never use */
> 		i915_disable_vga(dev);
>@@ -1581,6 +1599,8 @@ static void intel_crtc_dpms(struct drm_crtc *crtc, int mode)
> 	else
> 		i9xx_crtc_dpms(crtc, mode);
> 
>+	intel_crtc->dpms_mode = mode;
>+
> 	if (!dev->primary->master)
> 		return;
> 
>@@ -1603,8 +1623,6 @@ static void intel_crtc_dpms(struct drm_crtc *crtc, int mode)
> 		DRM_ERROR("Can't update pipe %d in SAREA\n", pipe);
> 		break;
> 	}
>-
>-	intel_crtc->dpms_mode = mode;
> }
> 
> static void intel_crtc_prepare (struct drm_crtc *crtc)
>@@ -1702,7 +1720,7 @@ static int intel_get_core_clock_speed(struct drm_device *dev)
>  * Return the pipe currently connected to the panel fitter,
>  * or -1 if the panel fitter is not present or not in use
>  */
>-static int intel_panel_fitter_pipe (struct drm_device *dev)
>+int intel_panel_fitter_pipe (struct drm_device *dev)
> {
> 	struct drm_i915_private *dev_priv = dev->dev_private;
> 	u32  pfit_control;
>@@ -2936,6 +2954,89 @@ void intel_release_load_detect_pipe(struct intel_output *intel_output, int dpms_
> 	}
> }
> 
>+/** Ensure that pipe A is enabled. Returns the crtc that runs pipe a or NULL
>+ * if pipe a is already enabled */
>+struct drm_crtc *intel_require_pipe_a_start(struct drm_device *dev,
>+					    int *dpms_mode)
>+{
>+	struct drm_crtc *crtc;
>+	struct intel_crtc *intel_crtc;
>+	struct drm_connector *connector;
>+	struct drm_crtc_helper_funcs *crtc_funcs;
>+	struct intel_output *intel_output;
>+
>+	crtc = intel_get_crtc_from_pipe(dev, 0);
>+	intel_crtc = to_intel_crtc(crtc);
>+	BUG_ON(intel_crtc->pipe != 0);
>+
>+	if (crtc->enabled && intel_crtc->dpms_mode == DRM_MODE_DPMS_ON)
>+		return NULL;
>+
>+	DRM_DEBUG("i915: require PIPEA, switching on crtc ...\n");
>+
>+	*dpms_mode = intel_crtc->dpms_mode;
>+
>+	if (crtc->enabled && intel_crtc->dpms_mode != DRM_MODE_DPMS_ON) {
>+		/* just switch it on */
>+		crtc_funcs = crtc->helper_private;
>+		crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
>+
>+		return crtc;
>+	}
>+
>+	if (!drm_helper_crtc_in_use(crtc)) {
>+		/* look for an encoder/connector */
>+		list_for_each_entry(connector,
>+				&dev->mode_config.connector_list, head) {
>+			intel_output = to_intel_output(connector);
>+
>+			if (intel_output->enc.crtc)
>+				/* don't steal connectors */
>+				continue;
>+
>+			if (!drm_encoder_crtc_ok(&intel_output->enc, crtc))
>+				continue;
>+
>+			intel_output->enc.crtc = crtc;
>+			break;
>+		}
>+	}
>+
>+	drm_crtc_helper_set_mode(crtc, &load_detect_mode, 0, 0, crtc->fb);
>+	BUG_ON(crtc->enabled);
>+
>+	return crtc;
>+}
>+
>+void intel_require_pipe_a_end(struct drm_device *dev,
>+			      struct drm_crtc *crtc,
>+			      int dpms_mode)
>+{
>+	struct drm_encoder_helper_funcs *encoder_funcs;
>+	struct drm_encoder *encoder;
>+	struct drm_crtc_helper_funcs *crtc_funcs;
>+
>+	if (!crtc)
>+		return;
>+
>+	crtc_funcs = crtc->helper_private;
>+
>+	DRM_DEBUG("i915: require PIPEA, switching off crtc ...\n");
>+
>+	/* Switch crtc and output back off if necessary */
>+	if (crtc->enabled && dpms_mode != DRM_MODE_DPMS_ON) {
>+		list_for_each_entry(encoder,
>+				&dev->mode_config.encoder_list, head) {
>+			if (encoder->crtc != crtc)
>+				continue;
>+			encoder_funcs = encoder->helper_private;
>+			encoder_funcs->dpms(encoder, dpms_mode);
>+		}
>+
>+		crtc_funcs->dpms(crtc, dpms_mode);
>+	}
>+}
>+
> /* Returns the clock of the currently programmed mode of the given pipe. */
> static int intel_crtc_clock_get(struct drm_device *dev, struct drm_crtc *crtc)
> {
>@@ -3124,30 +3225,26 @@ int intel_get_pipe_from_crtc_id(struct drm_device *dev, void *data,
> {
> 	drm_i915_private_t *dev_priv = dev->dev_private;
> 	struct drm_i915_get_pipe_from_crtc_id *pipe_from_crtc_id = data;
>-	struct drm_crtc *crtc = NULL;
>-	int pipe = -1;
>+	struct drm_mode_object *drmmode_obj;
>+	struct intel_crtc *crtc;
> 
> 	if (!dev_priv) {
> 		DRM_ERROR("called with no initialization\n");
> 		return -EINVAL;
> 	}
> 
>-	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
>-		struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
>-		if (crtc->base.id == pipe_from_crtc_id->crtc_id) {
>-			pipe = intel_crtc->pipe;
>-			break;
>-		}
>-	}
>+	drmmode_obj = drm_mode_object_find(dev, pipe_from_crtc_id->crtc_id,
>+			DRM_MODE_OBJECT_CRTC);
> 
>-	if (pipe == -1) {
>+	if (!drmmode_obj) {
> 		DRM_ERROR("no such CRTC id\n");
> 		return -EINVAL;
> 	}
> 
>-	pipe_from_crtc_id->pipe = pipe;
>+	crtc = to_intel_crtc(obj_to_crtc(drmmode_obj));
>+	pipe_from_crtc_id->pipe = crtc->pipe;
> 
>-       return 0;
>+	return 0;
> }
> 
> struct drm_crtc *intel_get_crtc_from_pipe(struct drm_device *dev, int pipe)
>@@ -3430,6 +3527,8 @@ void intel_modeset_init(struct drm_device *dev)
> 	}
> 
> 	intel_setup_outputs(dev);
>+
>+	intel_setup_overlay(dev);
> }
> 
> void intel_modeset_cleanup(struct drm_device *dev)
>diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
>index d6f92ea..3a5390c 100644
>--- a/drivers/gpu/drm/i915/intel_drv.h
>+++ b/drivers/gpu/drm/i915/intel_drv.h
>@@ -88,6 +88,25 @@ struct intel_output {
> 	void (*hot_plug)(struct intel_output *);
> };
> 
>+struct intel_crtc;
>+struct intel_overlay {
>+	struct drm_device *dev;
>+	struct intel_crtc *crtc;
>+	struct drm_i915_gem_object *vid_bo;
>+	struct drm_i915_gem_object *old_vid_bo;
>+	int active;
>+	int pfit_active;
>+	u32 pfit_vscale_ratio; /* shifted-point number, (1<<12) == 1.0 */
>+	u32 color_key;
>+	u32 brightness, contrast, saturation;
>+	u32 old_xscale, old_yscale;
>+	/* register access */
>+	u32 flip_addr;
>+	struct drm_i915_gem_object *reg_bo;
>+	void *virt_addr;
>+	int hw_wedged;
>+};
>+
> struct intel_crtc {
> 	struct drm_crtc base;
> 	int pipe;
>@@ -97,6 +116,7 @@ struct intel_crtc {
> 	u8 lut_r[256], lut_g[256], lut_b[256];
> 	int dpms_mode;
> 	struct intel_framebuffer *fbdev_fb;
>+	struct intel_overlay *overlay;
> 	/* a mode_set for fbdev users on this crtc */
> 	struct drm_mode_set mode_set;
> };
>@@ -125,6 +145,7 @@ intel_dp_set_m_n(struct drm_crtc *crtc, struct drm_display_mode *mode,
> extern void intel_edp_link_config (struct intel_output *, int *, int *);
> 
> 
>+extern int intel_panel_fitter_pipe (struct drm_device *dev);
> extern void intel_crtc_load_lut(struct drm_crtc *crtc);
> extern void intel_encoder_prepare (struct drm_encoder *encoder);
> extern void intel_encoder_commit (struct drm_encoder *encoder);
>@@ -142,6 +163,11 @@ extern struct drm_crtc *intel_get_load_detect_pipe(struct intel_output *intel_ou
> 						   int *dpms_mode);
> extern void intel_release_load_detect_pipe(struct intel_output *intel_output,
> 					   int dpms_mode);
>+extern struct drm_crtc *intel_require_pipe_a_start(struct drm_device *dev,
>+					    int *dpms_mode);
>+extern void intel_require_pipe_a_end(struct drm_device *dev,
>+			      struct drm_crtc *crtc,
>+			      int dpms_mode);
> 
> extern struct drm_connector* intel_sdvo_find(struct drm_device *dev, int sdvoB);
> extern int intel_sdvo_supports_hotplug(struct drm_connector *connector);
>@@ -157,4 +183,13 @@ extern int intel_framebuffer_create(struct drm_device *dev,
> 				    struct drm_mode_fb_cmd *mode_cmd,
> 				    struct drm_framebuffer **fb,
> 				    struct drm_gem_object *obj);
>+
>+
>+extern void intel_setup_overlay(struct drm_device *dev);
>+extern void intel_cleanup_overlay(struct drm_device *dev);
>+extern int intel_overlay_switch_off(struct intel_overlay *overlay);
>+extern int intel_overlay_put_image(struct drm_device *dev, void *data,
>+				   struct drm_file *file_priv);
>+extern int intel_overlay_attrs(struct drm_device *dev, void *data,
>+			       struct drm_file *file_priv);
> #endif /* __INTEL_DRV_H__ */
>diff --git a/drivers/gpu/drm/i915/intel_overlay.c b/drivers/gpu/drm/i915/intel_overlay.c
>new file mode 100644
>index 0000000..2eeef9f
>--- /dev/null
>+++ b/drivers/gpu/drm/i915/intel_overlay.c
>@@ -0,0 +1,1289 @@
>+/*
>+ * Copyright Â© 2009
>+ *
>+ * 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, sublicense,
>+ * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
>+ * THE AUTHORS OR COPYRIGHT HOLDERS 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.
>+ *
>+ * Authors:
>+ *    Daniel Vetter <daniel@ffwll.ch>
>+ *
>+ * Derived from Xorg ddx, xf86-video-intel, src/i830_video.c
>+ */
>+#include "drmP.h"
>+#include "drm.h"
>+#include "i915_drm.h"
>+#include "i915_drv.h"
>+#include "i915_reg.h"
>+#include "intel_drv.h"
>+
>+/* Limits for overlay size. According to intel doc, the real limits are:
>+ * Y width: 4095, UV width (planar): 2047, Y height: 2047,
>+ * UV width (planar): * 1023. But the xorg thinks 2048 for height and width. Use
>+ * the mininum of both.  */
>+#define IMAGE_MAX_WIDTH		2048
>+#define IMAGE_MAX_HEIGHT	2046 /* 2 * 1023 */
>+/* on 830 and 845 these large limits result in the card hanging */
>+#define IMAGE_MAX_WIDTH_LEGACY	1024
>+#define IMAGE_MAX_HEIGHT_LEGACY	1088
>+
>+/* overlay register definitions */
>+/* OCMD register */
>+#define OCMD_TILED_SURFACE	(0x1<<19)
>+#define OCMD_MIRROR_MASK	(0x3<<17)
>+#define OCMD_MIRROR_MODE	(0x3<<17)
>+#define OCMD_MIRROR_HORIZONTAL	(0x1<<17)
>+#define OCMD_MIRROR_VERTICAL	(0x2<<17)
>+#define OCMD_MIRROR_BOTH	(0x3<<17)
>+#define OCMD_BYTEORDER_MASK	(0x3<<14) /* zero for YUYV or FOURCC YUY2 */
>+#define OCMD_UV_SWAP		(0x1<<14) /* YVYU */
>+#define OCMD_Y_SWAP		(0x2<<14) /* UYVY or FOURCC UYVY */
>+#define OCMD_Y_AND_UV_SWAP	(0x3<<14) /* VYUY */
>+#define OCMD_SOURCE_FORMAT_MASK (0xf<<10)
>+#define OCMD_RGB_888		(0x1<<10) /* not in i965 Intel docs */
>+#define OCMD_RGB_555		(0x2<<10) /* not in i965 Intel docs */
>+#define OCMD_RGB_565		(0x3<<10) /* not in i965 Intel docs */
>+#define OCMD_YUV_422_PACKED	(0x8<<10)
>+#define OCMD_YUV_411_PACKED	(0x9<<10) /* not in i965 Intel docs */
>+#define OCMD_YUV_420_PLANAR	(0xc<<10)
>+#define OCMD_YUV_422_PLANAR	(0xd<<10)
>+#define OCMD_YUV_410_PLANAR	(0xe<<10) /* also 411 */
>+#define OCMD_TVSYNCFLIP_PARITY	(0x1<<9)
>+#define OCMD_TVSYNCFLIP_ENABLE	(0x1<<7)
>+#define OCMD_BUF_TYPE_MASK	(Ox1<<5)
>+#define OCMD_BUF_TYPE_FRAME	(0x0<<5)
>+#define OCMD_BUF_TYPE_FIELD	(0x1<<5)
>+#define OCMD_TEST_MODE		(0x1<<4)
>+#define OCMD_BUFFER_SELECT	(0x3<<2)
>+#define OCMD_BUFFER0		(0x0<<2)
>+#define OCMD_BUFFER1		(0x1<<2)
>+#define OCMD_FIELD_SELECT	(0x1<<2)
>+#define OCMD_FIELD0		(0x0<<1)
>+#define OCMD_FIELD1		(0x1<<1)
>+#define OCMD_ENABLE		(0x1<<0)
>+
>+/* OCONFIG register */
>+#define OCONF_PIPE_MASK		(0x1<<18)
>+#define OCONF_PIPE_A		(0x0<<18)
>+#define OCONF_PIPE_B		(0x1<<18)
>+#define OCONF_GAMMA2_ENABLE	(0x1<<16)
>+#define OCONF_CSC_MODE_BT601	(0x0<<5)
>+#define OCONF_CSC_MODE_BT709	(0x1<<5)
>+#define OCONF_CSC_BYPASS	(0x1<<4)
>+#define OCONF_CC_OUT_8BIT	(0x1<<3)
>+#define OCONF_TEST_MODE		(0x1<<2)
>+#define OCONF_THREE_LINE_BUFFER	(0x1<<0)
>+#define OCONF_TWO_LINE_BUFFER	(0x0<<0)
>+
>+/* DCLRKM (dst-key) register */
>+#define DST_KEY_ENABLE		(0x1<<31)
>+#define CLK_RGB24_MASK		0x0
>+#define CLK_RGB16_MASK		0x070307
>+#define CLK_RGB15_MASK		0x070707
>+#define CLK_RGB8I_MASK		0xffffff
>+
>+#define RGB16_TO_COLORKEY(c) \
>+	(((c & 0xF800) << 8) | ((c & 0x07E0) << 5) | ((c & 0x001F) << 3))
>+#define RGB15_TO_COLORKEY(c) \
>+	(((c & 0x7c00) << 9) | ((c & 0x03E0) << 6) | ((c & 0x001F) << 3))
>+
>+/* overlay flip addr flag */
>+#define OFC_UPDATE		0x1
>+
>+/* polyphase filter coefficients */
>+#define N_HORIZ_Y_TAPS          5
>+#define N_VERT_Y_TAPS           3
>+#define N_HORIZ_UV_TAPS         3
>+#define N_VERT_UV_TAPS          3
>+#define N_PHASES                17
>+#define MAX_TAPS                5
>+
>+/* memory bufferd overlay registers */
>+struct overlay_registers {
>+    u32 OBUF_0Y;
>+    u32 OBUF_1Y;
>+    u32 OBUF_0U;
>+    u32 OBUF_0V;
>+    u32 OBUF_1U;
>+    u32 OBUF_1V;
>+    u32 OSTRIDE;
>+    u32 YRGB_VPH;
>+    u32 UV_VPH;
>+    u32 HORZ_PH;
>+    u32 INIT_PHS;
>+    u32 DWINPOS;
>+    u32 DWINSZ;
>+    u32 SWIDTH;
>+    u32 SWIDTHSW;
>+    u32 SHEIGHT;
>+    u32 YRGBSCALE;
>+    u32 UVSCALE;
>+    u32 OCLRC0;
>+    u32 OCLRC1;
>+    u32 DCLRKV;
>+    u32 DCLRKM;
>+    u32 SCLRKVH;
>+    u32 SCLRKVL;
>+    u32 SCLRKEN;
>+    u32 OCONFIG;
>+    u32 OCMD;
>+    u32 RESERVED1; /* 0x6C */
>+    u32 OSTART_0Y;
>+    u32 OSTART_1Y;
>+    u32 OSTART_0U;
>+    u32 OSTART_0V;
>+    u32 OSTART_1U;
>+    u32 OSTART_1V;
>+    u32 OTILEOFF_0Y;
>+    u32 OTILEOFF_1Y;
>+    u32 OTILEOFF_0U;
>+    u32 OTILEOFF_0V;
>+    u32 OTILEOFF_1U;
>+    u32 OTILEOFF_1V;
>+    u32 FASTHSCALE; /* 0xA0 */
>+    u32 UVSCALEV; /* 0xA4 */
>+    u32 RESERVEDC[(0x200 - 0xA8) / 4]; /* 0xA8 - 0x1FC */
>+    u16 Y_VCOEFS[N_VERT_Y_TAPS * N_PHASES]; /* 0x200 */
>+    u16 RESERVEDD[0x100 / 2 - N_VERT_Y_TAPS * N_PHASES];
>+    u16 Y_HCOEFS[N_HORIZ_Y_TAPS * N_PHASES]; /* 0x300 */
>+    u16 RESERVEDE[0x200 / 2 - N_HORIZ_Y_TAPS * N_PHASES];
>+    u16 UV_VCOEFS[N_VERT_UV_TAPS * N_PHASES]; /* 0x500 */
>+    u16 RESERVEDF[0x100 / 2 - N_VERT_UV_TAPS * N_PHASES];
>+    u16 UV_HCOEFS[N_HORIZ_UV_TAPS * N_PHASES]; /* 0x600 */
>+    u16 RESERVEDG[0x100 / 2 - N_HORIZ_UV_TAPS * N_PHASES];
>+};
>+
>+/* overlay flip addr flag */
>+#define OFC_UPDATE		0x1
>+
>+#define OVERLAY_NONPHYSICAL(dev) (IS_G33(dev) || IS_I965G(dev))
>+#define OVERLAY_EXISTS(dev) (!IS_G4X(dev) && !IS_IGDNG(dev))
>+
>+
>+static struct overlay_registers *intel_overlay_map_regs_atomic(struct intel_overlay *overlay)
>+{
>+        drm_i915_private_t *dev_priv = overlay->dev->dev_private;
>+	struct overlay_registers *regs;
>+
>+	/* no recursive mappings */
>+	BUG_ON(overlay->virt_addr);
>+
>+	if (OVERLAY_NONPHYSICAL(overlay->dev)) {
>+		regs = io_mapping_map_atomic_wc(dev_priv->mm.gtt_mapping,
>+				overlay->reg_bo->gtt_offset);
>+
>+		if (!regs) {
>+			DRM_ERROR("failed to map overlay regs in GTT\n");
>+			return NULL;
>+		}
>+	} else
>+		regs = overlay->reg_bo->phys_obj->handle->vaddr;
>+
>+	return overlay->virt_addr = regs;
>+}
>+
>+static void intel_overlay_unmap_regs_atomic(struct intel_overlay *overlay)
>+{
>+	if (OVERLAY_NONPHYSICAL(overlay->dev))
>+		io_mapping_unmap_atomic(overlay->virt_addr);
>+
>+	overlay->virt_addr = NULL;
>+	/* XXX: no cache flushing implemented. Is this necessary at all ? */
>+
>+	return;
>+}
>+
>+/* overlay needs to be disable in OCMD reg */
>+static int intel_overlay_on(struct intel_overlay *overlay)
>+{
>+	struct drm_device *dev = overlay->dev;
>+        drm_i915_private_t *dev_priv = dev->dev_private;
>+	int dpms_mode_tmp;
>+	struct drm_crtc *crtc_tmp;
>+	int ret;
>+	RING_LOCALS;
>+
>+	BUG_ON(overlay->active);
>+
>+	crtc_tmp = intel_require_pipe_a_start(overlay->dev, &dpms_mode_tmp);
>+
>+	BEGIN_LP_RING(6);
>+	OUT_RING(MI_FLUSH);
>+	OUT_RING(MI_NOOP);
>+	OUT_RING(MI_OVERLAY_FLIP | MI_OVERLAY_ON);
>+	OUT_RING(overlay->flip_addr | OFC_UPDATE);
>+	OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP);
>+	OUT_RING(MI_NOOP);
>+	ADVANCE_LP_RING();
>+
>+	ret = i915_lp_ring_sync(dev);
>+	if (ret != 0) {
>+		DRM_ERROR("intel overlay: ring sync failed, hw likely wedged\n");
>+		overlay->hw_wedged = 1;
>+		return 0;
>+	}
>+
>+	intel_require_pipe_a_end(dev, crtc_tmp, dpms_mode_tmp);
>+
>+	overlay->active = 1;
>+
>+	return 0;
>+}
>+
>+/* overlay needs to be enabled in OCMD reg */
>+static void intel_overlay_continue(struct intel_overlay *overlay,
>+			    bool load_polyphase_filter)
>+{
>+	struct drm_device *dev = overlay->dev;
>+        drm_i915_private_t *dev_priv = dev->dev_private;
>+	u32 flip_addr = overlay->flip_addr;
>+	int ret;
>+	RING_LOCALS;
>+
>+	BUG_ON(!overlay->active);
>+
>+	if (load_polyphase_filter)
>+		flip_addr |= OFC_UPDATE;
>+
>+	BEGIN_LP_RING(6);
>+	OUT_RING(MI_FLUSH);
>+	OUT_RING(MI_NOOP);
>+	OUT_RING(MI_OVERLAY_FLIP | MI_OVERLAY_CONTINUE);
>+	OUT_RING(flip_addr);
>+        OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP);
>+        OUT_RING(MI_NOOP);
>+        ADVANCE_LP_RING();
>+
>+	/* run in lockstep with the hw for easier testing */
>+	ret = i915_lp_ring_sync(dev);
>+	if (ret != 0) {
>+		DRM_ERROR("intel overlay: ring sync failed, hw likely wedged\n");
>+		overlay->hw_wedged = 1;
>+	}
>+}
>+
>+static int intel_overlay_wait_flip(struct intel_overlay *overlay)
>+{
>+	/* don't overcomplicate things for now with asynchronous operations
>+	 * see comment above */
>+	return 0;
>+}
>+
>+/* overlay needs to be disabled in OCMD reg */
>+static int intel_overlay_off(struct intel_overlay *overlay)
>+{
>+	u32 flip_addr = overlay->flip_addr;
>+	struct drm_device *dev = overlay->dev;
>+        drm_i915_private_t *dev_priv = dev->dev_private;
>+	int ret;
>+	RING_LOCALS;
>+
>+	BUG_ON(!overlay->active);
>+
>+	/* According to intel docs the overlay hw may hang (when switching
>+	 * off) without loading the filter coeffs. It is however unclear whether
>+	 * this applies to the disabling of the overlay or to the switching off
>+	 * of the hw. Do it in both cases */
>+	flip_addr |= OFC_UPDATE;
>+
>+	/* wait for overlay to go idle */
>+	BEGIN_LP_RING(6);
>+	OUT_RING(MI_FLUSH);
>+	OUT_RING(MI_NOOP);
>+	OUT_RING(MI_OVERLAY_FLIP | MI_OVERLAY_CONTINUE);
>+	OUT_RING(flip_addr);
>+        OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP);
>+        OUT_RING(MI_NOOP);
>+        ADVANCE_LP_RING();
>+
>+	ret = i915_lp_ring_sync(dev);
>+	if (ret != 0) {
>+		DRM_ERROR("intel overlay: ring sync failed, hw likely wedged\n");
>+		overlay->hw_wedged = 1;
>+		return ret;
>+	}
>+
>+	/* turn overlay off */
>+	/* this is not done in userspace!
>+	BEGIN_LP_RING(6);
>+        OUT_RING(MI_FLUSH);
>+        OUT_RING(MI_NOOP);
>+        OUT_RING(MI_OVERLAY_FLIP | MI_OVERLAY_OFF);
>+	OUT_RING(flip_addr);
>+        OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP);
>+        OUT_RING(MI_NOOP);
>+	ADVANCE_LP_RING();
>+
>+	ret = i915_lp_ring_sync(dev);
>+	if (ret != 0) {
>+		DRM_ERROR("intel overlay: ring sync failed, hw likely wedged\n");
>+		overlay->hw_wedged = 1;
>+		return ret;
>+	}*/
>+
>+	overlay->active = 0;
>+
>+	return ret;
>+}
>+
>+/* wait for pending overlay flip and release old frame */
>+static int intel_overlay_release_old_vid(struct intel_overlay *overlay)
>+{
>+	int ret;
>+	struct drm_gem_object *obj;
>+
>+	ret = intel_overlay_wait_flip(overlay);
>+	if (ret != 0)
>+		return ret;
>+
>+	if (!overlay->old_vid_bo)
>+		return 0;
>+
>+	obj = overlay->old_vid_bo->obj;
>+	i915_gem_object_unpin(obj);
>+	drm_gem_object_unreference(obj);
>+	overlay->old_vid_bo = NULL;
>+
>+	return 0;
>+}
>+
>+struct put_image_params {
>+	int format;
>+	short dst_x;
>+	short dst_y;
>+	short dst_w;
>+	short dst_h;
>+	short src_w;
>+	short src_scan_w;
>+	short src_scan_h;
>+	short src_h;
>+	short stride_Y;
>+	short stride_UV;
>+	int offset_Y;
>+	int offset_U;
>+	int offset_V;
>+};
>+
>+static int packed_depth_bytes(u32 format)
>+{
>+	switch (format & I915_OVERLAY_DEPTH_MASK) {
>+		case I915_OVERLAY_YUV422:
>+			return 4;
>+		case I915_OVERLAY_YUV411:
>+			/* return 6; not implemented */
>+		default:
>+			return -EINVAL;
>+	}
>+}
>+
>+static int packed_width_bytes(u32 format, short width)
>+{
>+	switch (format & I915_OVERLAY_DEPTH_MASK) {
>+		case I915_OVERLAY_YUV422:
>+			return width << 1;
>+		default:
>+			return -EINVAL;
>+	}
>+}
>+
>+static int uv_hsubsampling(u32 format)
>+{
>+	switch (format & I915_OVERLAY_DEPTH_MASK) {
>+		case I915_OVERLAY_YUV422:
>+		case I915_OVERLAY_YUV420:
>+			return 2;
>+		case I915_OVERLAY_YUV411:
>+		case I915_OVERLAY_YUV410:
>+			return 4;
>+		default:
>+			return -EINVAL;
>+	}
>+}
>+
>+static int uv_vsubsampling(u32 format)
>+{
>+	switch (format & I915_OVERLAY_DEPTH_MASK) {
>+		case I915_OVERLAY_YUV420:
>+		case I915_OVERLAY_YUV410:
>+			return 2;
>+		case I915_OVERLAY_YUV422:
>+		case I915_OVERLAY_YUV411:
>+			return 1;
>+		default:
>+			return -EINVAL;
>+	}
>+}
>+
>+static u32 calc_swidthsw(struct drm_device *dev, u32 offset, u32 width)
>+{
>+	u32 mask, shift, ret;
>+	if (IS_I9XX(dev)) {
>+		mask = 0x3f;
>+		shift = 6;
>+	} else {
>+		mask = 0x1f;
>+		shift = 5;
>+	}
>+	ret = ((offset + width + mask) >> shift) - (offset >> shift);
>+	if (IS_I9XX(dev))
>+		ret <<= 1;
>+	ret -=1;
>+	return ret << 2;
>+}
>+
>+static const u16 y_static_hcoeffs[N_HORIZ_Y_TAPS * N_PHASES] = {
>+	0x3000, 0xb4a0, 0x1930, 0x1920, 0xb4a0,
>+	0x3000, 0xb500, 0x19d0, 0x1880, 0xb440,
>+	0x3000, 0xb540, 0x1a88, 0x2f80, 0xb3e0,
>+	0x3000, 0xb580, 0x1b30, 0x2e20, 0xb380,
>+	0x3000, 0xb5c0, 0x1bd8, 0x2cc0, 0xb320,
>+	0x3020, 0xb5e0, 0x1c60, 0x2b80, 0xb2c0,
>+	0x3020, 0xb5e0, 0x1cf8, 0x2a20, 0xb260,
>+	0x3020, 0xb5e0, 0x1d80, 0x28e0, 0xb200,
>+	0x3020, 0xb5c0, 0x1e08, 0x3f40, 0xb1c0,
>+	0x3020, 0xb580, 0x1e78, 0x3ce0, 0xb160,
>+	0x3040, 0xb520, 0x1ed8, 0x3aa0, 0xb120,
>+	0x3040, 0xb4a0, 0x1f30, 0x3880, 0xb0e0,
>+	0x3040, 0xb400, 0x1f78, 0x3680, 0xb0a0,
>+	0x3020, 0xb340, 0x1fb8, 0x34a0, 0xb060,
>+	0x3020, 0xb240, 0x1fe0, 0x32e0, 0xb040,
>+	0x3020, 0xb140, 0x1ff8, 0x3160, 0xb020,
>+	0xb000, 0x3000, 0x0800, 0x3000, 0xb000};
>+static const u16 uv_static_hcoeffs[N_HORIZ_UV_TAPS * N_PHASES] = {
>+	0x3000, 0x1800, 0x1800, 0xb000, 0x18d0, 0x2e60,
>+	0xb000, 0x1990, 0x2ce0, 0xb020, 0x1a68, 0x2b40,
>+	0xb040, 0x1b20, 0x29e0, 0xb060, 0x1bd8, 0x2880,
>+	0xb080, 0x1c88, 0x3e60, 0xb0a0, 0x1d28, 0x3c00,
>+	0xb0c0, 0x1db8, 0x39e0, 0xb0e0, 0x1e40, 0x37e0,
>+	0xb100, 0x1eb8, 0x3620, 0xb100, 0x1f18, 0x34a0,
>+	0xb100, 0x1f68, 0x3360, 0xb0e0, 0x1fa8, 0x3240,
>+	0xb0c0, 0x1fe0, 0x3140, 0xb060, 0x1ff0, 0x30a0,
>+	0x3000, 0x0800, 0x3000};
>+
>+static void update_polyphase_filter(struct overlay_registers *regs)
>+{
>+	memcpy(regs->Y_HCOEFS, y_static_hcoeffs, sizeof(y_static_hcoeffs));
>+	memcpy(regs->UV_HCOEFS, uv_static_hcoeffs, sizeof(uv_static_hcoeffs));
>+}
>+
>+static bool update_scaling_factors(struct intel_overlay *overlay,
>+				   struct overlay_registers *regs,
>+				   struct put_image_params *params)
>+{
>+	/* fixed point with a 12 bit shift */
>+	u32 xscale, yscale, xscale_UV, yscale_UV;
>+#define FP_SHIFT 12
>+#define FRACT_MASK 0xfff
>+	bool scale_changed = false;
>+	int uv_hscale = uv_hsubsampling(params->format);
>+	int uv_vscale = uv_vsubsampling(params->format);
>+
>+	if (params->dst_w > 1)
>+		xscale = ((params->src_scan_w - 1) << FP_SHIFT)
>+			/(params->dst_w);
>+	else
>+		xscale = 1 << FP_SHIFT;
>+
>+	if (params->dst_h > 1)
>+		yscale = ((params->src_scan_h - 1) << FP_SHIFT)
>+			/(params->dst_h);
>+	else
>+		yscale = 1 << FP_SHIFT;
>+
>+	/*if (params->format & I915_OVERLAY_YUV_PLANAR) {*/
>+		xscale_UV = xscale/uv_hscale;
>+		yscale_UV = yscale/uv_vscale;
>+		/* make the Y scale to UV scale ratio an exact multiply */
>+		xscale = xscale_UV * uv_hscale;
>+		yscale = yscale_UV * uv_vscale;
>+	/*} else {
>+		xscale_UV = 0;
>+		yscale_UV = 0;
>+	}*/
>+
>+	if (xscale != overlay->old_xscale || yscale != overlay->old_yscale)
>+		scale_changed = true;
>+	overlay->old_xscale = xscale;
>+	overlay->old_yscale = yscale;
>+
>+	regs->YRGBSCALE = ((yscale & FRACT_MASK) << 20)
>+		| ((xscale >> FP_SHIFT) << 16)
>+		| ((xscale & FRACT_MASK) << 3);
>+	regs->UVSCALE = ((yscale_UV & FRACT_MASK) << 20)
>+		| ((xscale_UV >> FP_SHIFT) << 16)
>+		| ((xscale_UV & FRACT_MASK) << 3);
>+	regs->UVSCALEV = ((yscale >> FP_SHIFT) << 16)
>+		| ((yscale_UV >> FP_SHIFT) << 0);
>+
>+	if (scale_changed)
>+		update_polyphase_filter(regs);
>+
>+	return scale_changed;
>+}
>+
>+static void update_colorkey(struct intel_overlay *overlay,
>+			    struct overlay_registers *regs)
>+{
>+	u32 key = overlay->color_key;
>+	switch (overlay->crtc->base.fb->bits_per_pixel) {
>+		case 8:
>+			regs->DCLRKV = 0;
>+			regs->DCLRKM = CLK_RGB8I_MASK | DST_KEY_ENABLE;
>+		case 16:
>+			if (overlay->crtc->base.fb->depth == 15) {
>+				regs->DCLRKV = RGB15_TO_COLORKEY(key);
>+				regs->DCLRKM = CLK_RGB15_MASK | DST_KEY_ENABLE;
>+			} else {
>+				regs->DCLRKV = RGB16_TO_COLORKEY(key);
>+				regs->DCLRKM = CLK_RGB16_MASK | DST_KEY_ENABLE;
>+			}
>+		case 24:
>+		case 32:
>+			regs->DCLRKV = key;
>+			regs->DCLRKM = CLK_RGB24_MASK | DST_KEY_ENABLE;
>+	}
>+}
>+
>+static u32 overlay_cmd_reg(struct put_image_params *params)
>+{
>+	u32 cmd = OCMD_ENABLE | OCMD_BUF_TYPE_FRAME | OCMD_BUFFER0;
>+
>+	if (params->format & I915_OVERLAY_YUV_PLANAR) {
>+		switch (params->format & I915_OVERLAY_DEPTH_MASK) {
>+			case I915_OVERLAY_YUV422:
>+				cmd |= OCMD_YUV_422_PLANAR;
>+				break;
>+			case I915_OVERLAY_YUV420:
>+				cmd |= OCMD_YUV_420_PLANAR;
>+				break;
>+			case I915_OVERLAY_YUV411:
>+			case I915_OVERLAY_YUV410:
>+				cmd |= OCMD_YUV_410_PLANAR;
>+				break;
>+		}
>+	} else { /* YUV packed */
>+		switch (params->format & I915_OVERLAY_DEPTH_MASK) {
>+			case I915_OVERLAY_YUV422:
>+				cmd |= OCMD_YUV_422_PACKED;
>+				break;
>+			case I915_OVERLAY_YUV411:
>+				cmd |= OCMD_YUV_411_PACKED;
>+				break;
>+		}
>+
>+		switch (params->format & I915_OVERLAY_SWAP_MASK) {
>+			case I915_OVERLAY_NO_SWAP:
>+				break;
>+			case I915_OVERLAY_UV_SWAP:
>+				cmd |= OCMD_UV_SWAP;
>+				break;
>+			case I915_OVERLAY_Y_SWAP:
>+				cmd |= OCMD_Y_SWAP;
>+				break;
>+			case I915_OVERLAY_Y_AND_UV_SWAP:
>+				cmd |= OCMD_Y_AND_UV_SWAP;
>+				break;
>+		}
>+	}
>+
>+	return cmd;
>+}
>+
>+int intel_overlay_do_put_image(struct intel_overlay *overlay,
>+			       struct drm_gem_object *new_bo,
>+			       struct put_image_params *params)
>+{
>+	int ret, tmp_width;
>+	struct overlay_registers *regs;
>+	bool scale_changed = false;
>+	struct drm_i915_gem_object *bo_priv = new_bo->driver_private;
>+	struct drm_device *dev = overlay->dev;
>+
>+	BUG_ON(!mutex_is_locked(&dev->struct_mutex));
>+	BUG_ON(!mutex_is_locked(&dev->mode_config.mutex));
>+	BUG_ON(!overlay);
>+
>+	if (overlay->hw_wedged)
>+		return -EBUSY;
>+
>+	ret = intel_overlay_release_old_vid(overlay);
>+	if (ret != 0)
>+		return ret;
>+
>+	ret = i915_gem_object_pin(new_bo, PAGE_SIZE);
>+	if (ret != 0)
>+		return ret;
>+
>+
>+	if (!overlay->active) {
>+		regs = intel_overlay_map_regs_atomic(overlay);
>+		if (!regs) {
>+			ret = -ENOMEM;
>+			goto out_unpin;
>+		}
>+		regs->OCONFIG = OCONF_CC_OUT_8BIT;
>+		if (IS_I965GM(overlay->dev))
>+			regs->OCONFIG |= OCONF_CSC_MODE_BT709;
>+		regs->OCONFIG |= overlay->crtc->pipe == 0 ?
>+			OCONF_PIPE_A : OCONF_PIPE_B;
>+		intel_overlay_unmap_regs_atomic(overlay);
>+
>+		ret = intel_overlay_on(overlay);
>+		if (ret != 0)
>+			goto out_unpin;
>+	}
>+
>+	regs = intel_overlay_map_regs_atomic(overlay);
>+	if (!regs) {
>+		ret = -ENOMEM;
>+		goto out_unpin;
>+	}
>+
>+	/* Official intel documentation claims that DWINPOS is zero based.
>+	 * My hardware (855GM) and the xorg ddx disagree. */
>+	regs->DWINPOS = (params->dst_y << 16) | params->dst_x;
>+	regs->DWINSZ = (params->dst_h << 16) | params->dst_w;
>+
>+	if (params->format & I915_OVERLAY_YUV_PACKED)
>+		tmp_width = packed_width_bytes(params->format, params->src_w);
>+	else
>+		tmp_width = params->src_w;
>+
>+	regs->SWIDTH = params->src_w;
>+	regs->SWIDTHSW = calc_swidthsw(overlay->dev,
>+			params->offset_Y, tmp_width);
>+	regs->SHEIGHT = params->src_h;
>+	regs->OBUF_0Y = bo_priv->gtt_offset + params-> offset_Y;
>+	regs->OSTRIDE = params->stride_Y;
>+
>+	if (params->format & I915_OVERLAY_YUV_PLANAR) {
>+		int uv_hscale = uv_hsubsampling(params->format);
>+		int uv_vscale = uv_vsubsampling(params->format);
>+		u32 tmp_U, tmp_V;
>+		regs->SWIDTH |= (params->src_w/uv_hscale) << 16;
>+		tmp_U = calc_swidthsw(overlay->dev, params->offset_U,
>+				params->src_w/uv_hscale);
>+		tmp_V = calc_swidthsw(overlay->dev, params->offset_V,
>+				params->src_w/uv_hscale);
>+		regs->SWIDTHSW |= max_t(u32, tmp_U, tmp_V) << 16;
>+		regs->SHEIGHT |= (params->src_h/uv_vscale) << 16;
>+		regs->OBUF_0U = bo_priv->gtt_offset + params->offset_U;
>+		regs->OBUF_0V = bo_priv->gtt_offset + params->offset_V;
>+		regs->OSTRIDE |= params->stride_UV << 16;
>+	}
>+
>+	scale_changed = update_scaling_factors(overlay, regs, params);
>+
>+	update_colorkey(overlay, regs);
>+
>+	regs->OCMD = overlay_cmd_reg(params);
>+
>+	intel_overlay_unmap_regs_atomic(overlay);
>+
>+	intel_overlay_continue(overlay, scale_changed);
>+
>+	overlay->old_vid_bo = overlay->vid_bo;
>+	overlay->vid_bo = new_bo->driver_private;
>+
>+	return 0;
>+
>+out_unpin:
>+	i915_gem_object_unpin(new_bo);
>+	return ret;
>+}
>+
>+int intel_overlay_switch_off(struct intel_overlay *overlay)
>+{
>+	int ret;
>+	struct overlay_registers *regs;
>+	struct drm_gem_object *obj;
>+	struct drm_device *dev = overlay->dev;
>+
>+	BUG_ON(!mutex_is_locked(&dev->struct_mutex));
>+	BUG_ON(!mutex_is_locked(&dev->mode_config.mutex));
>+
>+	if (!overlay->active)
>+		return 0;
>+
>+	if (overlay->hw_wedged)
>+		return -EBUSY;
>+
>+	ret = intel_overlay_release_old_vid(overlay);
>+	if (ret != 0)
>+		return ret;
>+
>+	regs = intel_overlay_map_regs_atomic(overlay);
>+	regs->OCMD = 0;
>+	intel_overlay_unmap_regs_atomic(overlay);
>+
>+	ret = intel_overlay_off(overlay);
>+	/* never have the overlay hw on without showing a frame */
>+	BUG_ON(!overlay->vid_bo);
>+	obj = overlay->vid_bo->obj;
>+
>+	i915_gem_object_unpin(obj);
>+	drm_gem_object_unreference(obj);
>+	overlay->vid_bo = NULL;
>+
>+	overlay->crtc->overlay = NULL;
>+	overlay->crtc = NULL;
>+
>+	return 0;
>+}
>+
>+static int check_overlay_possible_on_crtc(struct intel_overlay *overlay,
>+					  struct intel_crtc *crtc)
>+{
>+        drm_i915_private_t *dev_priv = overlay->dev->dev_private;
>+	u32 pipeconf;
>+	int pipeconf_reg = (crtc->pipe == 0) ? PIPEACONF : PIPEBCONF;
>+
>+	if (!crtc->base.enabled || crtc->dpms_mode != DRM_MODE_DPMS_ON)
>+		return -EINVAL;
>+
>+	pipeconf = I915_READ(pipeconf_reg);
>+
>+	/* can't use the overlay with double wide pipe */
>+	if (!IS_I965G(overlay->dev) && pipeconf & PIPEACONF_DOUBLE_WIDE)
>+		return -EINVAL;
>+
>+	return 0;
>+}
>+
>+static void update_pfit_vscale_ratio(struct intel_overlay *overlay)
>+{
>+	struct drm_device *dev = overlay->dev;
>+        drm_i915_private_t *dev_priv = dev->dev_private;
>+	u32 ratio;
>+	u32 pfit_control = I915_READ(PFIT_CONTROL);
>+
>+	/* XXX: This is not the same logic as in the xorg driver, but more in
>+	 * line with the intel documentation for the i965 */
>+	if (!IS_I965G(dev) && (pfit_control & VERT_AUTO_SCALE)) {
>+		ratio = I915_READ(PFIT_AUTO_RATIOS) >> PFIT_VERT_SCALE_SHIFT;
>+	} else { /* on i965 use the PGM reg to read out the autoscaler values */
>+		ratio = I915_READ(PFIT_PGM_RATIOS);
>+		if (IS_I965G(dev))
>+			ratio >>= PFIT_VERT_SCALE_SHIFT_965;
>+		else
>+			ratio >>= PFIT_VERT_SCALE_SHIFT;
>+	}
>+
>+	overlay->pfit_vscale_ratio = ratio;
>+}
>+
>+static int check_overlay_dst(struct intel_overlay *overlay,
>+			     struct drm_intel_overlay_put_image *rec)
>+{
>+	struct drm_display_mode *mode = &overlay->crtc->base.mode;
>+
>+	if ((rec->dst_x < mode->crtc_hdisplay)
>+	    && (rec->dst_x > 0)
>+	    && (rec->dst_x + rec->dst_width
>+		    <= mode->crtc_hdisplay)
>+	    && (rec->dst_y < mode->crtc_vdisplay)
>+	    && (rec->dst_y > 0)
>+	    && (rec->dst_y + rec->dst_height
>+		    <= mode->crtc_vdisplay))
>+		return 0;
>+	else
>+		return -EINVAL;
>+}
>+
>+static int check_overlay_scaling(struct put_image_params *rec)
>+{
>+	u32 tmp;
>+
>+	/* downscaling limit is 8.0 */
>+	tmp = ((rec->src_scan_h << 16) / rec->dst_h) >> 16;
>+	if (tmp > 7)
>+		return -EINVAL;
>+	tmp = ((rec->src_scan_w << 16) / rec->dst_w) >> 16;
>+	if (tmp > 7)
>+		return -EINVAL;
>+
>+	return 0;
>+}
>+
>+static int check_overlay_src(struct drm_device *dev,
>+			     struct drm_intel_overlay_put_image *rec,
>+			     struct drm_gem_object *new_bo)
>+{
>+	u32 stride_mask;
>+	int depth;
>+	int uv_hscale = uv_hsubsampling(rec->flags);
>+	int uv_vscale = uv_vsubsampling(rec->flags);
>+	size_t tmp;
>+
>+	/* check src dimensions */
>+	if (IS_845G(dev) || IS_I830(dev)) {
>+		if (rec->src_height > IMAGE_MAX_HEIGHT_LEGACY
>+		    || rec->src_width > IMAGE_MAX_WIDTH_LEGACY)
>+			return -EINVAL;
>+	} else {
>+		if (rec->src_height > IMAGE_MAX_HEIGHT
>+		    || rec->src_width > IMAGE_MAX_WIDTH)
>+			return -EINVAL;
>+	}
>+	/* better safe than sorry, use 4 as the maximal subsampling ratio */
>+	if (rec->src_height < N_VERT_Y_TAPS*4
>+	    || rec->src_width < N_HORIZ_Y_TAPS*4)
>+		return -EINVAL;
>+
>+	/* check alingment constrains */
>+	switch (rec->flags & I915_OVERLAY_TYPE_MASK) {
>+		case I915_OVERLAY_RGB:
>+			/* not implemented */
>+			return -EINVAL;
>+		case I915_OVERLAY_YUV_PACKED:
>+			depth = packed_depth_bytes(rec->flags);
>+			if (uv_vscale != 1)
>+				return -EINVAL;
>+			if (depth < 0)
>+				return depth;
>+			/* ignore UV planes */
>+			rec->stride_UV = 0;
>+			rec->offset_U = 0;
>+			rec->offset_V = 0;
>+			/* check pixel alignment */
>+			if (rec->offset_Y % depth)
>+				return -EINVAL;
>+			break;
>+		case I915_OVERLAY_YUV_PLANAR:
>+			if (uv_vscale < 0 || uv_hscale < 0)
>+				return -EINVAL;
>+			/* no offset restrictions for planar formats */
>+			break;
>+		default:
>+			return -EINVAL;
>+	}
>+
>+	if (rec->src_width % uv_hscale)
>+		return -EINVAL;
>+
>+	/* stride checking */
>+	stride_mask = 63;
>+
>+	if (rec->stride_Y & stride_mask || rec->stride_UV & stride_mask)
>+		return -EINVAL;
>+	if (IS_I965G(dev) && rec->stride_Y < 512)
>+		return -EINVAL;
>+
>+	tmp = (rec->flags & I915_OVERLAY_TYPE_MASK) == I915_OVERLAY_YUV_PLANAR ?
>+		4 : 8;
>+	if (rec->stride_Y > tmp*1024 || rec->stride_UV > 2*1024)
>+		return -EINVAL;
>+
>+	/* check buffer dimensions */
>+	switch (rec->flags & I915_OVERLAY_TYPE_MASK) {
>+		case I915_OVERLAY_RGB:
>+		case I915_OVERLAY_YUV_PACKED:
>+			/* always 4 Y values per depth pixels */
>+			if (packed_width_bytes(rec->flags, rec->src_width)
>+					> rec->stride_Y)
>+				return -EINVAL;
>+
>+			tmp = rec->stride_Y*rec->src_height;
>+			if (rec->offset_Y + tmp > new_bo->size)
>+				return -EINVAL;
>+			break;
>+		case I915_OVERLAY_YUV_PLANAR:
>+			if (rec->src_width > rec->stride_Y)
>+				return -EINVAL;
>+			if (rec->src_width/uv_hscale > rec->stride_UV)
>+				return -EINVAL;
>+
>+			tmp = rec->stride_Y*rec->src_height;
>+			if (rec->offset_Y + tmp > new_bo->size)
>+				return -EINVAL;
>+			tmp = rec->stride_UV*rec->src_height;
>+			tmp /= uv_vscale;
>+			if (rec->offset_U + tmp > new_bo->size
>+			    || rec->offset_V + tmp > new_bo->size)
>+				return -EINVAL;
>+			break;
>+	}
>+
>+	return 0;
>+}
>+
>+int intel_overlay_put_image(struct drm_device *dev, void *data,
>+                            struct drm_file *file_priv)
>+{
>+	struct drm_intel_overlay_put_image *put_image_rec = data;
>+	drm_i915_private_t *dev_priv = dev->dev_private;
>+	struct intel_overlay *overlay;
>+	struct drm_mode_object *drmmode_obj;
>+	struct intel_crtc *crtc;
>+	struct drm_gem_object *new_bo;
>+	struct put_image_params *params;
>+	int ret;
>+
>+	if (!dev_priv) {
>+		DRM_ERROR("called with no initialization\n");
>+		return -EINVAL;
>+	}
>+
>+	overlay = dev_priv->overlay;
>+	if (!overlay)
>+		return -ENODEV;
>+
>+	if (!(put_image_rec->flags & I915_OVERLAY_ENABLE)) {
>+		mutex_lock(&dev->mode_config.mutex);
>+		mutex_lock(&dev->struct_mutex);
>+
>+		ret = intel_overlay_switch_off(overlay);
>+
>+		mutex_unlock(&dev->struct_mutex);
>+		mutex_unlock(&dev->mode_config.mutex);
>+
>+		return ret;
>+	}
>+
>+	params = kmalloc(sizeof(struct put_image_params), GFP_KERNEL);
>+	if (!params)
>+		return -ENOMEM;
>+
>+	drmmode_obj = drm_mode_object_find(dev, put_image_rec->crtc_id,
>+                        DRM_MODE_OBJECT_CRTC);
>+	if (!drmmode_obj)
>+		return -ENOENT;
>+	crtc = to_intel_crtc(obj_to_crtc(drmmode_obj));
>+
>+	new_bo = drm_gem_object_lookup(dev, file_priv,
>+			put_image_rec->bo_handle);
>+	if (!new_bo)
>+		return -ENOENT;
>+
>+	mutex_lock(&dev->mode_config.mutex);
>+	mutex_lock(&dev->struct_mutex);
>+
>+	if (overlay->crtc != crtc) {
>+		struct drm_display_mode *mode = &crtc->base.mode;
>+		ret = intel_overlay_switch_off(overlay);
>+		if (ret != 0)
>+			goto out_unlock;
>+
>+		ret = check_overlay_possible_on_crtc(overlay, crtc);
>+		if (ret != 0)
>+			goto out_unlock;
>+
>+		overlay->crtc = crtc;
>+		crtc->overlay = overlay;
>+
>+		if (intel_panel_fitter_pipe(dev) == crtc->pipe
>+		    /* and line to wide, i.e. one-line-mode */
>+		    && mode->hdisplay > 1024) {
>+			overlay->pfit_active = 1;
>+			update_pfit_vscale_ratio(overlay);
>+		} else
>+			overlay->pfit_active = 0;
>+	}
>+
>+	ret = check_overlay_dst(overlay, put_image_rec);
>+	if (ret != 0)
>+		goto out_unlock;
>+
>+	if (overlay->pfit_active) {
>+		/* dst_y is 1-based, ratio is 0-based, substract/add 1 */
>+		params->dst_y = ((((u32)put_image_rec->dst_y - 1) << 12) /
>+			overlay->pfit_vscale_ratio) + 1;
>+		/* shifting right rounds downwards, so add 1 */
>+		params->dst_h = ((((u32)put_image_rec->dst_height) << 12) /
>+			overlay->pfit_vscale_ratio) + 1;
>+	} else {
>+		params->dst_y = put_image_rec->dst_y;
>+		params->dst_h = put_image_rec->dst_height;
>+	}
>+	params->dst_x = put_image_rec->dst_x;
>+	params->dst_w = put_image_rec->dst_width;
>+
>+	params->src_w = put_image_rec->src_width;
>+	params->src_h = put_image_rec->src_height;
>+	params->src_scan_w = put_image_rec->src_scan_width;
>+	params->src_scan_h = put_image_rec->src_scan_height;
>+	if (params->src_scan_h > params->src_h
>+	    || params->src_scan_w > params->src_w) {
>+		ret = -EINVAL;
>+		goto out_unlock;
>+	}
>+
>+	ret = check_overlay_src(dev, put_image_rec, new_bo);
>+	if (ret != 0)
>+		goto out_unlock;
>+	params->format = put_image_rec->flags & ~I915_OVERLAY_FLAGS_MASK;
>+	params->stride_Y = put_image_rec->stride_Y;
>+	params->stride_UV = put_image_rec->stride_UV;
>+	params->offset_Y = put_image_rec->offset_Y;
>+	params->offset_U = put_image_rec->offset_U;
>+	params->offset_V = put_image_rec->offset_V;
>+
>+	/* Check scaling after src size to prevent a divide-by-zero. */
>+	ret = check_overlay_scaling(params);
>+	if (ret != 0)
>+		goto out_unlock;
>+
>+	ret = intel_overlay_do_put_image(overlay, new_bo, params);
>+	if (ret != 0)
>+		goto out_unlock;
>+
>+	mutex_unlock(&dev->struct_mutex);
>+	mutex_unlock(&dev->mode_config.mutex);
>+
>+	kfree(params);
>+
>+	return 0;
>+
>+out_unlock:
>+	mutex_unlock(&dev->struct_mutex);
>+	mutex_unlock(&dev->mode_config.mutex);
>+	drm_gem_object_unreference(new_bo);
>+	kfree(params);
>+
>+	return ret;
>+}
>+
>+static void update_reg_attrs(struct intel_overlay *overlay,
>+			     struct overlay_registers *regs)
>+{
>+	regs->OCLRC0 = (overlay->contrast << 18) | (overlay->brightness & 0xff);
>+	regs->OCLRC1 = overlay->saturation;
>+}
>+
>+static bool check_gamma_bounds(u32 gamma1, u32 gamma2)
>+{
>+	int i;
>+
>+	if (gamma1 & 0xff000000 || gamma2 & 0xff000000)
>+		return false;
>+
>+	for (i = 0; i < 3; i++) {
>+		if (((gamma1 >> i * 8) & 0xff) >= ((gamma2 >> i*8) & 0xff))
>+			return false;
>+	}
>+
>+	return true;
>+}
>+
>+static bool check_gamma5_errata(u32 gamma5)
>+{
>+	int i;
>+
>+	for (i = 0; i < 3; i++) {
>+		if (((gamma5 >> i*8) & 0xff) == 0x80)
>+			return false;
>+	}
>+
>+	return true;
>+}
>+
>+static int check_gamma(struct drm_intel_overlay_attrs *attrs)
>+{
>+	if (!check_gamma_bounds(0, attrs->gamma0)
>+	    || !check_gamma_bounds(attrs->gamma0, attrs->gamma1)
>+	    || !check_gamma_bounds(attrs->gamma1, attrs->gamma2)
>+	    || !check_gamma_bounds(attrs->gamma2, attrs->gamma3)
>+	    || !check_gamma_bounds(attrs->gamma3, attrs->gamma4)
>+	    || !check_gamma_bounds(attrs->gamma4, attrs->gamma5)
>+	    || !check_gamma_bounds(attrs->gamma5, 0x00ffffff))
>+		return -EINVAL;
>+	if (!check_gamma5_errata(attrs->gamma5))
>+		return -EINVAL;
>+	return 0;
>+}
>+
>+int intel_overlay_attrs(struct drm_device *dev, void *data,
>+                        struct drm_file *file_priv)
>+{
>+	struct drm_intel_overlay_attrs *attrs = data;
>+        drm_i915_private_t *dev_priv = dev->dev_private;
>+	struct intel_overlay *overlay;
>+	struct overlay_registers *regs;
>+	int ret;
>+
>+	if (!dev_priv) {
>+		DRM_ERROR("called with no initialization\n");
>+		return -EINVAL;
>+	}
>+
>+	overlay = dev_priv->overlay;
>+	if (!overlay) {
>+		DRM_DEBUG("userspace bug: no overlay\n");
>+		return -ENODEV;
>+	}
>+
>+	mutex_lock(&dev->mode_config.mutex);
>+	mutex_lock(&dev->struct_mutex);
>+
>+	if (!(attrs->flags & I915_OVERLAY_UPDATE_ATTRS)) {
>+		attrs->color_key = overlay->color_key;
>+		attrs->brightness = overlay->brightness;
>+		attrs->contrast = overlay->contrast;
>+		attrs->saturation = overlay->saturation;
>+
>+		if (IS_I9XX(dev)) {
>+			attrs->gamma0 = I915_READ(OGAMC0);
>+			attrs->gamma1 = I915_READ(OGAMC1);
>+			attrs->gamma2 = I915_READ(OGAMC2);
>+			attrs->gamma3 = I915_READ(OGAMC3);
>+			attrs->gamma4 = I915_READ(OGAMC4);
>+			attrs->gamma5 = I915_READ(OGAMC5);
>+		}
>+		ret = 0;
>+	} else {
>+		overlay->color_key = attrs->color_key;
>+		if (attrs->brightness >= -128 && attrs->brightness <= 127) {
>+			overlay->brightness = attrs->brightness;
>+		} else {
>+			ret = -EINVAL;
>+			goto out_unlock;
>+		}
>+		if (attrs->contrast <= 255) {
>+			overlay->contrast = attrs->contrast;
>+		} else {
>+			ret = -EINVAL;
>+			goto out_unlock;
>+		}
>+		if (attrs->saturation <= 1023) {
>+			overlay->saturation = attrs->saturation;
>+		} else {
>+			ret = -EINVAL;
>+			goto out_unlock;
>+		}
>+
>+		regs = intel_overlay_map_regs_atomic(overlay);
>+		if (!regs) {
>+			ret = -ENOMEM;
>+			goto out_unlock;
>+		}
>+
>+		update_reg_attrs(overlay, regs);
>+
>+		intel_overlay_unmap_regs_atomic(overlay);
>+
>+		if (attrs->flags & I915_OVERLAY_UPDATE_GAMMA) {
>+			if (!IS_I9XX(dev)) {
>+				ret = -EINVAL;
>+				goto out_unlock;
>+			}
>+
>+			if (overlay->active) {
>+				ret = -EBUSY;
>+				goto out_unlock;
>+			}
>+
>+			ret = check_gamma(attrs);
>+			if (ret != 0)
>+				goto out_unlock;
>+
>+			I915_WRITE(OGAMC0, attrs->gamma0);
>+			I915_WRITE(OGAMC1, attrs->gamma1);
>+			I915_WRITE(OGAMC2, attrs->gamma2);
>+			I915_WRITE(OGAMC3, attrs->gamma3);
>+			I915_WRITE(OGAMC4, attrs->gamma4);
>+			I915_WRITE(OGAMC5, attrs->gamma5);
>+		}
>+		ret = 0;
>+	}
>+
>+out_unlock:
>+	mutex_unlock(&dev->struct_mutex);
>+	mutex_unlock(&dev->mode_config.mutex);
>+
>+	return ret;
>+}
>+
>+void intel_setup_overlay(struct drm_device *dev)
>+{
>+        drm_i915_private_t *dev_priv = dev->dev_private;
>+	struct intel_overlay *overlay;
>+	struct drm_gem_object *reg_bo;
>+	struct overlay_registers *regs;
>+	int ret;
>+
>+	if (!OVERLAY_EXISTS(dev))
>+		return;
>+
>+	overlay = kzalloc(sizeof(struct intel_overlay), GFP_KERNEL);
>+	if (!overlay)
>+		return;
>+	overlay->dev = dev;
>+
>+	reg_bo = drm_gem_object_alloc(dev, PAGE_SIZE);
>+	if (!reg_bo)
>+		goto out_free;
>+	overlay->reg_bo = reg_bo->driver_private;
>+
>+	if (OVERLAY_NONPHYSICAL(dev)) {
>+		ret = i915_gem_object_pin(reg_bo, PAGE_SIZE);
>+		if (ret) {
>+                        DRM_ERROR("failed to pin overlay register bo\n");
>+                        goto out_free_bo;
>+                }
>+		overlay->flip_addr = overlay->reg_bo->gtt_offset;
>+	} else {
>+		ret = i915_gem_attach_phys_object(dev, reg_bo,
>+				I915_GEM_PHYS_OVERLAY_REGS);
>+                if (ret) {
>+                        DRM_ERROR("failed to attach phys overlay regs\n");
>+                        goto out_free_bo;
>+                }
>+		overlay->flip_addr = overlay->reg_bo->phys_obj->handle->busaddr;
>+	}
>+
>+	/* init all values */
>+	overlay->color_key = 0x0101fe;
>+	overlay->brightness = -19;
>+	overlay->contrast = 75;
>+	overlay->saturation = 146;
>+
>+	regs = intel_overlay_map_regs_atomic(overlay);
>+	if (!regs)
>+		goto out_free_bo;
>+
>+	memset(regs, 0, sizeof(struct overlay_registers));
>+	update_polyphase_filter(regs);
>+
>+	update_reg_attrs(overlay, regs);
>+
>+	intel_overlay_unmap_regs_atomic(overlay);
>+
>+	dev_priv->overlay = overlay;
>+	DRM_INFO("initialized overlay support g6\n");
>+	return;
>+
>+out_free_bo:
>+	drm_gem_object_unreference(reg_bo);
>+out_free:
>+	kfree(overlay);
>+	return;
>+}
>+
>+void intel_cleanup_overlay(struct drm_device *dev)
>+{
>+        drm_i915_private_t *dev_priv = dev->dev_private;
>+
>+	if (dev_priv->overlay) {
>+		/* The bo's should be free'd by the generic code already.
>+		 * Furthermore modesetting teardown happens beforehand so the
>+		 * hardware should be off already */
>+		BUG_ON(dev_priv->overlay->active);
>+
>+		kfree(dev_priv->overlay);
>+	}
>+}
>diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
>index 7300fb8..1946d42 100644
>--- a/include/drm/drm_crtc.h
>+++ b/include/drm/drm_crtc.h
>@@ -691,7 +691,8 @@ extern void drm_mode_connector_detach_encoder(struct drm_connector *connector,
> 					   struct drm_encoder *encoder);
> extern bool drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc,
> 					 int gamma_size);
>-extern void *drm_mode_object_find(struct drm_device *dev, uint32_t id, uint32_t type);
>+extern struct drm_mode_object *drm_mode_object_find(struct drm_device *dev,
>+		uint32_t id, uint32_t type);
> /* IOCTLs */
> extern int drm_mode_getresources(struct drm_device *dev,
> 				 void *data, struct drm_file *file_priv);
>diff --git a/include/drm/drm_crtc_helper.h b/include/drm/drm_crtc_helper.h
>index 6769ff6..26c457f 100644
>--- a/include/drm/drm_crtc_helper.h
>+++ b/include/drm/drm_crtc_helper.h
>@@ -123,4 +123,6 @@ static inline void drm_connector_helper_add(struct drm_connector *connector,
> }
> 
> extern int drm_helper_resume_force_mode(struct drm_device *dev);
>+extern bool drm_encoder_crtc_ok(struct drm_encoder *encoder,
>+				struct drm_crtc *crtc);
> #endif
>diff --git a/include/drm/drm_os_linux.h b/include/drm/drm_os_linux.h
>index 26641e9..3933691 100644
>--- a/include/drm/drm_os_linux.h
>+++ b/include/drm/drm_os_linux.h
>@@ -123,5 +123,5 @@ do {								\
> 	remove_wait_queue(&(queue), &entry);			\
> } while (0)
> 
>-#define DRM_WAKEUP( queue ) wake_up_interruptible( queue )
>+#define DRM_WAKEUP( queue ) wake_up( queue )
> #define DRM_INIT_WAITQUEUE( queue ) init_waitqueue_head( queue )
>diff --git a/include/drm/i915_drm.h b/include/drm/i915_drm.h
>index 8e1e925..a240f8a 100644
>--- a/include/drm/i915_drm.h
>+++ b/include/drm/i915_drm.h
>@@ -185,6 +185,8 @@ typedef struct _drm_i915_sarea {
> #define DRM_I915_GEM_GET_APERTURE 0x23
> #define DRM_I915_GEM_MMAP_GTT	0x24
> #define DRM_I915_GET_PIPE_FROM_CRTC_ID	0x25
>+#define DRM_I915_OVERLAY_PUT_IMAGE	0x26
>+#define DRM_I915_OVERLAY_ATTRS	0x27
> 
> #define DRM_IOCTL_I915_INIT		DRM_IOW( DRM_COMMAND_BASE + DRM_I915_INIT, drm_i915_init_t)
> #define DRM_IOCTL_I915_FLUSH		DRM_IO ( DRM_COMMAND_BASE + DRM_I915_FLUSH)
>@@ -221,6 +223,8 @@ typedef struct _drm_i915_sarea {
> #define DRM_IOCTL_I915_GEM_GET_TILING	DRM_IOWR (DRM_COMMAND_BASE + DRM_I915_GEM_GET_TILING, struct drm_i915_gem_get_tiling)
> #define DRM_IOCTL_I915_GEM_GET_APERTURE	DRM_IOR  (DRM_COMMAND_BASE + DRM_I915_GEM_GET_APERTURE, struct drm_i915_gem_get_aperture)
> #define DRM_IOCTL_I915_GET_PIPE_FROM_CRTC_ID DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_GET_PIPE_FROM_CRTC_ID, struct drm_intel_get_pipe_from_crtc_id)
>+#define DRM_IOCTL_I915_OVERLAY_PUT_IMAGE	DRM_IOW(DRM_COMMAND_BASE + DRM_IOCTL_I915_OVERLAY_ATTRS, struct drm_intel_overlay_put_image)
>+#define DRM_IOCTL_I915_OVERLAY_ATTRS	DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_OVERLAY_ATTRS, struct drm_intel_overlay_attrs)
> 
> /* Allow drivers to submit batchbuffers directly to hardware, relying
>  * on the security mechanisms provided by hardware.
>@@ -264,6 +268,7 @@ typedef struct drm_i915_irq_wait {
> #define I915_PARAM_CHIPSET_ID            4
> #define I915_PARAM_HAS_GEM               5
> #define I915_PARAM_NUM_FENCES_AVAIL      6
>+#define I915_PARAM_HAS_OVERLAY           7
> 
> typedef struct drm_i915_getparam {
> 	int param;
>@@ -667,4 +672,70 @@ struct drm_i915_get_pipe_from_crtc_id {
> 	__u32 pipe;
> };
> 
>+/* flags */
>+#define I915_OVERLAY_TYPE_MASK 		0xff
>+#define I915_OVERLAY_YUV_PLANAR 	0x01
>+#define I915_OVERLAY_YUV_PACKED 	0x02
>+#define I915_OVERLAY_RGB		0x03
>+
>+#define I915_OVERLAY_DEPTH_MASK		0xff00
>+#define I915_OVERLAY_RGB24		0x1000
>+#define I915_OVERLAY_RGB16		0x2000
>+#define I915_OVERLAY_RGB15		0x3000
>+#define I915_OVERLAY_YUV422		0x0100
>+#define I915_OVERLAY_YUV411		0x0200
>+#define I915_OVERLAY_YUV420		0x0300
>+#define I915_OVERLAY_YUV410		0x0400
>+
>+#define I915_OVERLAY_SWAP_MASK		0xff0000
>+#define I915_OVERLAY_NO_SWAP		0x000000
>+#define I915_OVERLAY_UV_SWAP		0x010000
>+#define I915_OVERLAY_Y_SWAP		0x020000
>+#define I915_OVERLAY_Y_AND_UV_SWAP	0x030000
>+
>+#define I915_OVERLAY_FLAGS_MASK		0xff000000
>+#define I915_OVERLAY_ENABLE		0x01000000
>+
>+struct drm_intel_overlay_put_image {
>+	/* various flags and src format description */
>+	__u32 flags;
>+	/* source picture description */
>+	__u32 bo_handle;
>+	/* stride values and offsets are in bytes, buffer relative */
>+	__u16 stride_Y; /* stride for packed formats */
>+	__u16 stride_UV;
>+	__u32 offset_Y; /* offset for packet formats */
>+	__u32 offset_U;
>+	__u32 offset_V;
>+	/* in pixels */
>+	__u16 src_width;
>+	__u16 src_height;
>+	/* to compensate the scaling factors for partially covered surfaces */
>+	__u16 src_scan_width;
>+	__u16 src_scan_height;
>+	/* output crtc description */
>+	__u32 crtc_id;
>+	__u16 dst_x;
>+	__u16 dst_y;
>+	__u16 dst_width;
>+	__u16 dst_height;
>+};
>+
>+/* flags */
>+#define I915_OVERLAY_UPDATE_ATTRS	(1<<0)
>+#define I915_OVERLAY_UPDATE_GAMMA	(1<<1)
>+struct drm_intel_overlay_attrs {
>+	__u32 flags;
>+	__u32 color_key;
>+	__s32 brightness;
>+	__u32 contrast;
>+	__u32 saturation;
>+	__u32 gamma0;
>+	__u32 gamma1;
>+	__u32 gamma2;
>+	__u32 gamma3;
>+	__u32 gamma4;
>+	__u32 gamma5;
>+};
>+
> #endif				/* _I915_DRM_H_ */

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