/*
 * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
 */

/*
 * Copyright (c) 2012, 2013, Intel Corporation.  All rights reserved.
 */

/*
 * Copyright © 2007 David Airlie
 *
 * 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:
 *     David Airlie
 */

#include "drmP.h"
#include "drm.h"
#include "drm_crtc.h"
#include "drm_fb_helper.h"
#include "intel_drv.h"
#include "i915_drm.h"
#include "i915_drv.h"

static int intelfb_create(struct drm_fb_helper *helper,
			  struct drm_fb_helper_surface_size *sizes)
{
	struct intel_fbdev *ifbdev = (struct intel_fbdev *)helper;
	struct drm_device *dev = ifbdev->helper.dev;
	struct drm_i915_private *dev_priv = dev->dev_private;
	struct drm_framebuffer *fb;
	struct drm_mode_fb_cmd2 mode_cmd;
	struct drm_i915_gem_object *obj;
	int size, ret;

	/* we don't do packed 24bpp */
	if (sizes->surface_bpp == 24)
		sizes->surface_bpp = 32;

	(void) memset(&mode_cmd, 0, sizeof(struct drm_mode_fb_cmd2));

	mode_cmd.width = sizes->surface_width;
	mode_cmd.height = sizes->surface_height;

	mode_cmd.pitches[0] = ALIGN(mode_cmd.width * ((sizes->surface_bpp + 7) /
						      8), 64);
	mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
							  sizes->surface_depth);

	size = mode_cmd.pitches[0] * mode_cmd.height;
	size = ALIGN(size, PAGE_SIZE);

	obj = dev_priv->fbcon_obj;

	if (!obj) {
		DRM_ERROR("There is no framebuffer for console");
		ret = -ENOMEM;
		goto out;
	}

	mutex_lock(&dev->struct_mutex);

	ret = intel_framebuffer_init(dev, &ifbdev->ifb, &mode_cmd, obj);
	if (ret)
		goto out_unpin;

	fb = &ifbdev->ifb.base;

	ifbdev->helper.fb = fb;

	mutex_unlock(&dev->struct_mutex);

	return 0;

out_unpin:
	i915_gem_object_unpin(obj);
out_unref:
	drm_gem_object_unreference(&obj->base);
	mutex_unlock(&dev->struct_mutex);
out:
	return ret;
}

static struct drm_fb_helper_funcs intel_fb_helper_funcs = {
	.gamma_set = intel_crtc_fb_gamma_set,
	.gamma_get = intel_crtc_fb_gamma_get,
	.fb_probe = intelfb_create,
};

static void intel_fbdev_destroy(struct drm_device *dev,
				struct intel_fbdev *ifbdev)
{
	struct intel_framebuffer *ifb = &ifbdev->ifb;

	drm_fb_helper_fini(&ifbdev->helper);

	drm_framebuffer_unregister_private(&ifb->base);
	drm_framebuffer_cleanup(&ifb->base);
	if (ifb->obj) {
		drm_gem_object_unreference_unlocked(&ifb->obj->base);
		ifb->obj = NULL;
	}
}

int intel_fbdev_init(struct drm_device *dev)
{
	struct intel_fbdev *ifbdev;
	struct drm_i915_private *dev_priv = dev->dev_private;
	int ret;

	ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
	if (!ifbdev)
		return -ENOMEM;

	dev_priv->fbdev = ifbdev;
	ifbdev->helper.funcs = &intel_fb_helper_funcs;

	ret = drm_fb_helper_init(dev, &ifbdev->helper,
				 INTEL_INFO(dev)->num_pipes,
				 INTELFB_CONN_LIMIT);
	if (ret) {
		kfree(ifbdev, sizeof(struct intel_fbdev));
		return ret;
	}

	(void) drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
	return 0;
}

void intel_fbdev_initial_config(struct drm_device *dev)
{
	struct drm_i915_private *dev_priv = dev->dev_private;

	/* Due to peculiar init order wrt to hpd handling this is separate. */
	(void) drm_fb_helper_initial_config(&dev_priv->fbdev->helper, 16);
}

void intel_fbdev_fini(struct drm_device *dev)
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	if (!dev_priv->fbdev)
		return;

	intel_fbdev_destroy(dev, dev_priv->fbdev);
	kfree(dev_priv->fbdev, sizeof(struct intel_fbdev));
	dev_priv->fbdev = NULL;
}

void intel_fb_output_poll_changed(struct drm_device *dev)
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	if (dev_priv->fbdev != NULL)
		(void) drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
}

void intel_fb_restore_mode(struct drm_device *dev)
{
	int ret;
	struct drm_i915_private *dev_priv = dev->dev_private;

	if (INTEL_INFO(dev)->num_pipes == 0)
		return;

	drm_modeset_lock_all(dev);

	ret = drm_fb_helper_restore_fbdev_mode(&dev_priv->fbdev->helper);
	if (ret)
		DRM_DEBUG("failed to restore crtc mode\n");

	drm_modeset_unlock_all(dev);
}