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/*

 * Copyright © 2011 Intel Corporation

 *

 * 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:

 *   Jesse Barnes 

 *

 * New plane/sprite handling.

 *

 * The older chips had a separate interface for programming plane related

 * registers; newer ones are much simpler and we can use the new DRM plane

 * support.

 */

#include 

#include 

#include 

#include "intel_drv.h"

#include 

#include "i915_drv.h"

static void

ivb_update_plane(struct drm_plane *plane, struct drm_framebuffer *fb,

		 struct drm_i915_gem_object *obj, int crtc_x, int crtc_y,

		 unsigned int crtc_w, unsigned int crtc_h,

		 uint32_t x, uint32_t y,

		 uint32_t src_w, uint32_t src_h)

{

	struct drm_device *dev = plane->dev;

	struct drm_i915_private *dev_priv = dev->dev_private;

	struct intel_plane *intel_plane = to_intel_plane(plane);

	int pipe = intel_plane->pipe;

	u32 sprctl, sprscale = 0;

	int pixel_size;

	sprctl = I915_READ(SPRCTL(pipe));

	/* Mask out pixel format bits in case we change it */

	sprctl &= ~SPRITE_PIXFORMAT_MASK;

	sprctl &= ~SPRITE_RGB_ORDER_RGBX;

	sprctl &= ~SPRITE_YUV_BYTE_ORDER_MASK;

	sprctl &= ~SPRITE_TILED;

	switch (fb->pixel_format) {

	case DRM_FORMAT_XBGR8888:

		sprctl |= SPRITE_FORMAT_RGBX888 | SPRITE_RGB_ORDER_RGBX;

		pixel_size = 4;

		break;

	case DRM_FORMAT_XRGB8888:

		sprctl |= SPRITE_FORMAT_RGBX888;

		pixel_size = 4;

		break;

	case DRM_FORMAT_YUYV:

		sprctl |= SPRITE_FORMAT_YUV422 | SPRITE_YUV_ORDER_YUYV;

		pixel_size = 2;

		break;

	case DRM_FORMAT_YVYU:

		sprctl |= SPRITE_FORMAT_YUV422 | SPRITE_YUV_ORDER_YVYU;

		pixel_size = 2;

		break;

	case DRM_FORMAT_UYVY:

		sprctl |= SPRITE_FORMAT_YUV422 | SPRITE_YUV_ORDER_UYVY;

		pixel_size = 2;

		break;

	case DRM_FORMAT_VYUY:

		sprctl |= SPRITE_FORMAT_YUV422 | SPRITE_YUV_ORDER_VYUY;

		pixel_size = 2;

		break;

	default:

		DRM_DEBUG_DRIVER("bad pixel format, assuming RGBX888\n");

		sprctl |= SPRITE_FORMAT_RGBX888;

		pixel_size = 4;

		break;

	}

	if (obj->tiling_mode != I915_TILING_NONE)

		sprctl |= SPRITE_TILED;

	/* must disable */

	sprctl |= SPRITE_TRICKLE_FEED_DISABLE;

	sprctl |= SPRITE_ENABLE;

	/* Sizes are 0 based */

	src_w--;

	src_h--;

	crtc_w--;

	crtc_h--;

	intel_update_sprite_watermarks(dev, pipe, crtc_w, pixel_size);

	/*

	 * IVB workaround: must disable low power watermarks for at least

	 * one frame before enabling scaling.  LP watermarks can be re-enabled

	 * when scaling is disabled.

	 */

	if (crtc_w != src_w || crtc_h != src_h) {

		if (!dev_priv->sprite_scaling_enabled) {

		dev_priv->sprite_scaling_enabled = true;

			intel_update_watermarks(dev);

		intel_wait_for_vblank(dev, pipe);

		}

		sprscale = SPRITE_SCALE_ENABLE | (src_w << 16) | src_h;

	} else {

		if (dev_priv->sprite_scaling_enabled) {

		dev_priv->sprite_scaling_enabled = false;

		/* potentially re-enable LP watermarks */

			intel_update_watermarks(dev);

		}

	}

	I915_WRITE(SPRSTRIDE(pipe), fb->pitches[0]);

	I915_WRITE(SPRPOS(pipe), (crtc_y << 16) | crtc_x);

	if (obj->tiling_mode != I915_TILING_NONE) {

		I915_WRITE(SPRTILEOFF(pipe), (y << 16) | x);

	} else {

		unsigned long offset;

		offset = y * fb->pitches[0] + x * (fb->bits_per_pixel / 8);

		I915_WRITE(SPRLINOFF(pipe), offset);

	}

	I915_WRITE(SPRSIZE(pipe), (crtc_h << 16) | crtc_w);

	I915_WRITE(SPRSCALE(pipe), sprscale);

	I915_WRITE(SPRCTL(pipe), sprctl);

	I915_MODIFY_DISPBASE(SPRSURF(pipe), obj->gtt_offset);

	POSTING_READ(SPRSURF(pipe));

}

static void

ivb_disable_plane(struct drm_plane *plane)

{

	struct drm_device *dev = plane->dev;

	struct drm_i915_private *dev_priv = dev->dev_private;

	struct intel_plane *intel_plane = to_intel_plane(plane);

	int pipe = intel_plane->pipe;

	I915_WRITE(SPRCTL(pipe), I915_READ(SPRCTL(pipe)) & ~SPRITE_ENABLE);

	/* Can't leave the scaler enabled... */

	I915_WRITE(SPRSCALE(pipe), 0);

	/* Activate double buffered register update */

	I915_MODIFY_DISPBASE(SPRSURF(pipe), 0);

	POSTING_READ(SPRSURF(pipe));

	dev_priv->sprite_scaling_enabled = false;

	intel_update_watermarks(dev);

}

static int

ivb_update_colorkey(struct drm_plane *plane,

		    struct drm_intel_sprite_colorkey *key)

{

	struct drm_device *dev = plane->dev;

	struct drm_i915_private *dev_priv = dev->dev_private;

	struct intel_plane *intel_plane;

	u32 sprctl;

	int ret = 0;

	intel_plane = to_intel_plane(plane);

	I915_WRITE(SPRKEYVAL(intel_plane->pipe), key->min_value);

	I915_WRITE(SPRKEYMAX(intel_plane->pipe), key->max_value);

	I915_WRITE(SPRKEYMSK(intel_plane->pipe), key->channel_mask);

	sprctl = I915_READ(SPRCTL(intel_plane->pipe));

	sprctl &= ~(SPRITE_SOURCE_KEY | SPRITE_DEST_KEY);

	if (key->flags & I915_SET_COLORKEY_DESTINATION)

		sprctl |= SPRITE_DEST_KEY;

	else if (key->flags & I915_SET_COLORKEY_SOURCE)

		sprctl |= SPRITE_SOURCE_KEY;

	I915_WRITE(SPRCTL(intel_plane->pipe), sprctl);

	POSTING_READ(SPRKEYMSK(intel_plane->pipe));

	return ret;

}

static void

ivb_get_colorkey(struct drm_plane *plane, struct drm_intel_sprite_colorkey *key)

{

	struct drm_device *dev = plane->dev;

	struct drm_i915_private *dev_priv = dev->dev_private;

	struct intel_plane *intel_plane;

	u32 sprctl;

	intel_plane = to_intel_plane(plane);

	key->min_value = I915_READ(SPRKEYVAL(intel_plane->pipe));

	key->max_value = I915_READ(SPRKEYMAX(intel_plane->pipe));

	key->channel_mask = I915_READ(SPRKEYMSK(intel_plane->pipe));

	key->flags = 0;

	sprctl = I915_READ(SPRCTL(intel_plane->pipe));

	if (sprctl & SPRITE_DEST_KEY)

		key->flags = I915_SET_COLORKEY_DESTINATION;

	else if (sprctl & SPRITE_SOURCE_KEY)

		key->flags = I915_SET_COLORKEY_SOURCE;

	else

		key->flags = I915_SET_COLORKEY_NONE;

}

static void

ilk_update_plane(struct drm_plane *plane, struct drm_framebuffer *fb,

		 struct drm_i915_gem_object *obj, int crtc_x, int crtc_y,

		 unsigned int crtc_w, unsigned int crtc_h,

		 uint32_t x, uint32_t y,

		 uint32_t src_w, uint32_t src_h)

{

	struct drm_device *dev = plane->dev;

	struct drm_i915_private *dev_priv = dev->dev_private;

	struct intel_plane *intel_plane = to_intel_plane(plane);

	int pipe = intel_plane->pipe, pixel_size;

	u32 dvscntr, dvsscale;

	dvscntr = I915_READ(DVSCNTR(pipe));

	/* Mask out pixel format bits in case we change it */

	dvscntr &= ~DVS_PIXFORMAT_MASK;

	dvscntr &= ~DVS_RGB_ORDER_XBGR;

	dvscntr &= ~DVS_YUV_BYTE_ORDER_MASK;

	dvscntr &= ~DVS_TILED;

	switch (fb->pixel_format) {

	case DRM_FORMAT_XBGR8888:

		dvscntr |= DVS_FORMAT_RGBX888 | DVS_RGB_ORDER_XBGR;

		pixel_size = 4;

		break;

	case DRM_FORMAT_XRGB8888:

		dvscntr |= DVS_FORMAT_RGBX888;

		pixel_size = 4;

		break;

	case DRM_FORMAT_YUYV:

		dvscntr |= DVS_FORMAT_YUV422 | DVS_YUV_ORDER_YUYV;

		pixel_size = 2;

		break;

	case DRM_FORMAT_YVYU:

		dvscntr |= DVS_FORMAT_YUV422 | DVS_YUV_ORDER_YVYU;

		pixel_size = 2;

		break;

	case DRM_FORMAT_UYVY:

		dvscntr |= DVS_FORMAT_YUV422 | DVS_YUV_ORDER_UYVY;

		pixel_size = 2;

		break;

	case DRM_FORMAT_VYUY:

		dvscntr |= DVS_FORMAT_YUV422 | DVS_YUV_ORDER_VYUY;

		pixel_size = 2;

		break;

	default:

		DRM_DEBUG_DRIVER("bad pixel format, assuming RGBX888\n");

		dvscntr |= DVS_FORMAT_RGBX888;

		pixel_size = 4;

		break;

	}

	if (obj->tiling_mode != I915_TILING_NONE)

		dvscntr |= DVS_TILED;

	if (IS_GEN6(dev))

		dvscntr |= DVS_TRICKLE_FEED_DISABLE; /* must disable */

	dvscntr |= DVS_ENABLE;

	/* Sizes are 0 based */

	src_w--;

	src_h--;

	crtc_w--;

	crtc_h--;

	intel_update_sprite_watermarks(dev, pipe, crtc_w, pixel_size);

	dvsscale = 0;

	if (IS_GEN5(dev) || crtc_w != src_w || crtc_h != src_h)

		dvsscale = DVS_SCALE_ENABLE | (src_w << 16) | src_h;

	I915_WRITE(DVSSTRIDE(pipe), fb->pitches[0]);

	I915_WRITE(DVSPOS(pipe), (crtc_y << 16) | crtc_x);

	if (obj->tiling_mode != I915_TILING_NONE) {

		I915_WRITE(DVSTILEOFF(pipe), (y << 16) | x);

	} else {

		unsigned long offset;

		offset = y * fb->pitches[0] + x * (fb->bits_per_pixel / 8);

		I915_WRITE(DVSLINOFF(pipe), offset);

	}

	I915_WRITE(DVSSIZE(pipe), (crtc_h << 16) | crtc_w);

	I915_WRITE(DVSSCALE(pipe), dvsscale);

	I915_WRITE(DVSCNTR(pipe), dvscntr);

	I915_MODIFY_DISPBASE(DVSSURF(pipe), obj->gtt_offset);

	POSTING_READ(DVSSURF(pipe));

}

static void

ilk_disable_plane(struct drm_plane *plane)

{

	struct drm_device *dev = plane->dev;

	struct drm_i915_private *dev_priv = dev->dev_private;

	struct intel_plane *intel_plane = to_intel_plane(plane);

	int pipe = intel_plane->pipe;

	I915_WRITE(DVSCNTR(pipe), I915_READ(DVSCNTR(pipe)) & ~DVS_ENABLE);

	/* Disable the scaler */

	I915_WRITE(DVSSCALE(pipe), 0);

	/* Flush double buffered register updates */

	I915_MODIFY_DISPBASE(DVSSURF(pipe), 0);

	POSTING_READ(DVSSURF(pipe));

}

static void

intel_enable_primary(struct drm_crtc *crtc)

{

	struct drm_device *dev = crtc->dev;

	struct drm_i915_private *dev_priv = dev->dev_private;

	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);

	int reg = DSPCNTR(intel_crtc->plane);

	if (!intel_crtc->primary_disabled)

		return;

	intel_crtc->primary_disabled = false;

	intel_update_fbc(dev);

	I915_WRITE(reg, I915_READ(reg) | DISPLAY_PLANE_ENABLE);

}

static void

intel_disable_primary(struct drm_crtc *crtc)

{

	struct drm_device *dev = crtc->dev;

	struct drm_i915_private *dev_priv = dev->dev_private;

	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);

	int reg = DSPCNTR(intel_crtc->plane);

	if (intel_crtc->primary_disabled)

		return;

	I915_WRITE(reg, I915_READ(reg) & ~DISPLAY_PLANE_ENABLE);

	intel_crtc->primary_disabled = true;

	intel_update_fbc(dev);

}

static int

ilk_update_colorkey(struct drm_plane *plane,

		    struct drm_intel_sprite_colorkey *key)

{

	struct drm_device *dev = plane->dev;

	struct drm_i915_private *dev_priv = dev->dev_private;

	struct intel_plane *intel_plane;

	u32 dvscntr;

	int ret = 0;

	intel_plane = to_intel_plane(plane);

	I915_WRITE(DVSKEYVAL(intel_plane->pipe), key->min_value);

	I915_WRITE(DVSKEYMAX(intel_plane->pipe), key->max_value);

	I915_WRITE(DVSKEYMSK(intel_plane->pipe), key->channel_mask);

	dvscntr = I915_READ(DVSCNTR(intel_plane->pipe));

	dvscntr &= ~(DVS_SOURCE_KEY | DVS_DEST_KEY);

	if (key->flags & I915_SET_COLORKEY_DESTINATION)

		dvscntr |= DVS_DEST_KEY;

	else if (key->flags & I915_SET_COLORKEY_SOURCE)

		dvscntr |= DVS_SOURCE_KEY;

	I915_WRITE(DVSCNTR(intel_plane->pipe), dvscntr);

	POSTING_READ(DVSKEYMSK(intel_plane->pipe));

	return ret;

}

static void

ilk_get_colorkey(struct drm_plane *plane, struct drm_intel_sprite_colorkey *key)

{

	struct drm_device *dev = plane->dev;

	struct drm_i915_private *dev_priv = dev->dev_private;

	struct intel_plane *intel_plane;

	u32 dvscntr;

	intel_plane = to_intel_plane(plane);

	key->min_value = I915_READ(DVSKEYVAL(intel_plane->pipe));

	key->max_value = I915_READ(DVSKEYMAX(intel_plane->pipe));

	key->channel_mask = I915_READ(DVSKEYMSK(intel_plane->pipe));

	key->flags = 0;

	dvscntr = I915_READ(DVSCNTR(intel_plane->pipe));

	if (dvscntr & DVS_DEST_KEY)

		key->flags = I915_SET_COLORKEY_DESTINATION;

	else if (dvscntr & DVS_SOURCE_KEY)

		key->flags = I915_SET_COLORKEY_SOURCE;

	else

		key->flags = I915_SET_COLORKEY_NONE;

}

static int

intel_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,

		   struct drm_framebuffer *fb, int crtc_x, int crtc_y,

		   unsigned int crtc_w, unsigned int crtc_h,

		   uint32_t src_x, uint32_t src_y,

		   uint32_t src_w, uint32_t src_h)

{

	struct drm_device *dev = plane->dev;

	struct drm_i915_private *dev_priv = dev->dev_private;

	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);

	struct intel_plane *intel_plane = to_intel_plane(plane);

	struct intel_framebuffer *intel_fb;

	struct drm_i915_gem_object *obj, *old_obj;

	int pipe = intel_plane->pipe;

	int ret = 0;

	int x = src_x >> 16, y = src_y >> 16;

	int primary_w = crtc->mode.hdisplay, primary_h = crtc->mode.vdisplay;

	bool disable_primary = false;

	intel_fb = to_intel_framebuffer(fb);

	obj = intel_fb->obj;

	old_obj = intel_plane->obj;

	src_w = src_w >> 16;

	src_h = src_h >> 16;

	/* Pipe must be running... */

	if (!(I915_READ(PIPECONF(pipe)) & PIPECONF_ENABLE))

		return -EINVAL;

	if (crtc_x >= primary_w || crtc_y >= primary_h)

		return -EINVAL;

	/* Don't modify another pipe's plane */

	if (intel_plane->pipe != intel_crtc->pipe)

		return -EINVAL;

	/*

	 * Clamp the width & height into the visible area.  Note we don't

	 * try to scale the source if part of the visible region is offscreen.

	 * The caller must handle that by adjusting source offset and size.

	 */

	if ((crtc_x < 0) && ((crtc_x + crtc_w) > 0)) {

		crtc_w += crtc_x;

		crtc_x = 0;

	}

	if ((crtc_x + crtc_w) <= 0) /* Nothing to display */

		goto out;

	if ((crtc_x + crtc_w) > primary_w)

		crtc_w = primary_w - crtc_x;

	if ((crtc_y < 0) && ((crtc_y + crtc_h) > 0)) {

		crtc_h += crtc_y;

		crtc_y = 0;

	}

	if ((crtc_y + crtc_h) <= 0) /* Nothing to display */

		goto out;

	if (crtc_y + crtc_h > primary_h)

		crtc_h = primary_h - crtc_y;

	if (!crtc_w || !crtc_h) /* Again, nothing to display */

		goto out;

	/*

	 * We can take a larger source and scale it down, but

	 * only so much...  16x is the max on SNB.

	 */

	if (((src_w * src_h) / (crtc_w * crtc_h)) > intel_plane->max_downscale)

		return -EINVAL;

	/*

	 * If the sprite is completely covering the primary plane,

	 * we can disable the primary and save power.

	 */

	if ((crtc_x == 0) && (crtc_y == 0) &&

	    (crtc_w == primary_w) && (crtc_h == primary_h))

		disable_primary = true;

	mutex_lock(&dev->struct_mutex);

	ret = intel_pin_and_fence_fb_obj(dev, obj, NULL);

	if (ret)

		goto out_unlock;

	intel_plane->obj = obj;

	/*

	 * Be sure to re-enable the primary before the sprite is no longer

	 * covering it fully.

	 */

	if (!disable_primary)

		intel_enable_primary(crtc);

	intel_plane->update_plane(plane, fb, obj, crtc_x, crtc_y,

				  crtc_w, crtc_h, x, y, src_w, src_h);

	if (disable_primary)

		intel_disable_primary(crtc);

	/* Unpin old obj after new one is active to avoid ugliness */

	if (old_obj) {

		/*

		 * It's fairly common to simply update the position of

		 * an existing object.  In that case, we don't need to

		 * wait for vblank to avoid ugliness, we only need to

		 * do the pin & ref bookkeeping.

		 */

		if (old_obj != obj) {

			mutex_unlock(&dev->struct_mutex);

			intel_wait_for_vblank(dev, to_intel_crtc(crtc)->pipe);

			mutex_lock(&dev->struct_mutex);

		}

		intel_unpin_fb_obj(old_obj);

	}

out_unlock:

	mutex_unlock(&dev->struct_mutex);

out:

	return ret;

}

static int

intel_disable_plane(struct drm_plane *plane)

{

	struct drm_device *dev = plane->dev;

	struct intel_plane *intel_plane = to_intel_plane(plane);

	int ret = 0;

	if (plane->crtc)

		intel_enable_primary(plane->crtc);

	intel_plane->disable_plane(plane);

	if (!intel_plane->obj)

		goto out;

	mutex_lock(&dev->struct_mutex);

	intel_unpin_fb_obj(intel_plane->obj);

	intel_plane->obj = NULL;

	mutex_unlock(&dev->struct_mutex);

out:

	return ret;

}

static void intel_destroy_plane(struct drm_plane *plane)

{

	struct intel_plane *intel_plane = to_intel_plane(plane);

	intel_disable_plane(plane);

	drm_plane_cleanup(plane);

	kfree(intel_plane);

}

int intel_sprite_set_colorkey(struct drm_device *dev, void *data,

			      struct drm_file *file_priv)

{

	struct drm_intel_sprite_colorkey *set = data;

	struct drm_mode_object *obj;

	struct drm_plane *plane;

	struct intel_plane *intel_plane;

	int ret = 0;

//   if (!drm_core_check_feature(dev, DRIVER_MODESET))

//       return -ENODEV;

	/* Make sure we don't try to enable both src & dest simultaneously */

	if ((set->flags & (I915_SET_COLORKEY_DESTINATION | I915_SET_COLORKEY_SOURCE)) == (I915_SET_COLORKEY_DESTINATION | I915_SET_COLORKEY_SOURCE))

		return -EINVAL;

	mutex_lock(&dev->mode_config.mutex);

	obj = drm_mode_object_find(dev, set->plane_id, DRM_MODE_OBJECT_PLANE);

	if (!obj) {

		ret = -EINVAL;

		goto out_unlock;

	}

	plane = obj_to_plane(obj);

	intel_plane = to_intel_plane(plane);

	ret = intel_plane->update_colorkey(plane, set);

out_unlock:

	mutex_unlock(&dev->mode_config.mutex);

	return ret;

}

int intel_sprite_get_colorkey(struct drm_device *dev, void *data,

			      struct drm_file *file_priv)

{

	struct drm_intel_sprite_colorkey *get = data;

	struct drm_mode_object *obj;

	struct drm_plane *plane;

	struct intel_plane *intel_plane;

	int ret = 0;

//   if (!drm_core_check_feature(dev, DRIVER_MODESET))

//       return -ENODEV;

	mutex_lock(&dev->mode_config.mutex);

	obj = drm_mode_object_find(dev, get->plane_id, DRM_MODE_OBJECT_PLANE);

	if (!obj) {

		ret = -EINVAL;

		goto out_unlock;

	}

	plane = obj_to_plane(obj);

	intel_plane = to_intel_plane(plane);

	intel_plane->get_colorkey(plane, get);

out_unlock:

	mutex_unlock(&dev->mode_config.mutex);

	return ret;

}

static const struct drm_plane_funcs intel_plane_funcs = {

	.update_plane = intel_update_plane,

	.disable_plane = intel_disable_plane,

	.destroy = intel_destroy_plane,

};

static uint32_t ilk_plane_formats[] = {

	DRM_FORMAT_XRGB8888,

	DRM_FORMAT_YUYV,

	DRM_FORMAT_YVYU,

	DRM_FORMAT_UYVY,

	DRM_FORMAT_VYUY,

};

static uint32_t snb_plane_formats[] = {

	DRM_FORMAT_XBGR8888,

	DRM_FORMAT_XRGB8888,

	DRM_FORMAT_YUYV,

	DRM_FORMAT_YVYU,

	DRM_FORMAT_UYVY,

	DRM_FORMAT_VYUY,

};

int

intel_plane_init(struct drm_device *dev, enum pipe pipe)

{

	struct intel_plane *intel_plane;

	unsigned long possible_crtcs;

	const uint32_t *plane_formats;

	int num_plane_formats;

	int ret;

	if (INTEL_INFO(dev)->gen < 5)

		return -ENODEV;

	intel_plane = kzalloc(sizeof(struct intel_plane), GFP_KERNEL);

	if (!intel_plane)

		return -ENOMEM;

	switch (INTEL_INFO(dev)->gen) {

	case 5:

	case 6:

		intel_plane->max_downscale = 16;

		intel_plane->update_plane = ilk_update_plane;

		intel_plane->disable_plane = ilk_disable_plane;

		intel_plane->update_colorkey = ilk_update_colorkey;

		intel_plane->get_colorkey = ilk_get_colorkey;

	if (IS_GEN6(dev)) {

			plane_formats = snb_plane_formats;

			num_plane_formats = ARRAY_SIZE(snb_plane_formats);

		} else {

			plane_formats = ilk_plane_formats;

			num_plane_formats = ARRAY_SIZE(ilk_plane_formats);

		}

		break;

	case 7:

		intel_plane->max_downscale = 2;

		intel_plane->update_plane = ivb_update_plane;

		intel_plane->disable_plane = ivb_disable_plane;

		intel_plane->update_colorkey = ivb_update_colorkey;

		intel_plane->get_colorkey = ivb_get_colorkey;

		plane_formats = snb_plane_formats;

		num_plane_formats = ARRAY_SIZE(snb_plane_formats);

		break;

	default:

		kfree(intel_plane);

		return -ENODEV;

	}

	intel_plane->pipe = pipe;

	possible_crtcs = (1 << pipe);

	ret = drm_plane_init(dev, &intel_plane->base, possible_crtcs,

			     &intel_plane_funcs,

			     plane_formats, num_plane_formats,

			     false);

	if (ret)

		kfree(intel_plane);

	return ret;

}