// SPDX-License-Identifier: GPL-2.0-only
/**************************************************************************
 * Copyright (c) 2007-2011, Intel Corporation.
 * All Rights Reserved.
 *
 **************************************************************************/

#include <drm/drm_framebuffer.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_modeset_helper.h>

#include "framebuffer.h"
#include "psb_drv.h"

static const struct drm_framebuffer_funcs psb_fb_funcs = {
        .destroy = drm_gem_fb_destroy,
        .create_handle = drm_gem_fb_create_handle,
};

/**
 *      psb_framebuffer_init    -       initialize a framebuffer
 *      @dev: our DRM device
 *      @fb: framebuffer to set up
 *      @mode_cmd: mode description
 *      @obj: backing object
 *
 *      Configure and fill in the boilerplate for our frame buffer. Return
 *      0 on success or an error code if we fail.
 */
static int psb_framebuffer_init(struct drm_device *dev,
                                        struct drm_framebuffer *fb,
                                        const struct drm_format_info *info,
                                        const struct drm_mode_fb_cmd2 *mode_cmd,
                                        struct drm_gem_object *obj)
{
        int ret;

        /*
         * Reject unknown formats, YUV formats, and formats with more than
         * 4 bytes per pixel.
         */
        if (!info->depth || info->cpp[0] > 4)
                return -EINVAL;

        if (mode_cmd->pitches[0] & 63)
                return -EINVAL;

        drm_helper_mode_fill_fb_struct(dev, fb, info, mode_cmd);
        fb->obj[0] = obj;
        ret = drm_framebuffer_init(dev, fb, &psb_fb_funcs);
        if (ret) {
                dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
                return ret;
        }
        return 0;
}

/**
 *      psb_framebuffer_create  -       create a framebuffer backed by gt
 *      @dev: our DRM device
 *      @info: pixel format information
 *      @mode_cmd: the description of the requested mode
 *      @obj: the backing object
 *
 *      Create a framebuffer object backed by the gt, and fill in the
 *      boilerplate required
 *
 *      TODO: review object references
 */
struct drm_framebuffer *psb_framebuffer_create(struct drm_device *dev,
                                               const struct drm_format_info *info,
                                               const struct drm_mode_fb_cmd2 *mode_cmd,
                                               struct drm_gem_object *obj)
{
        struct drm_framebuffer *fb;
        int ret;

        fb = kzalloc_obj(*fb);
        if (!fb)
                return ERR_PTR(-ENOMEM);

        ret = psb_framebuffer_init(dev, fb, info, mode_cmd, obj);
        if (ret) {
                kfree(fb);
                return ERR_PTR(ret);
        }
        return fb;
}

/**
 *      psb_user_framebuffer_create     -       create framebuffer
 *      @dev: our DRM device
 *      @filp: client file
 *      @cmd: mode request
 *
 *      Create a new framebuffer backed by a userspace GEM object
 */
static struct drm_framebuffer *psb_user_framebuffer_create
                        (struct drm_device *dev, struct drm_file *filp,
                         const struct drm_format_info *info,
                         const struct drm_mode_fb_cmd2 *cmd)
{
        struct drm_gem_object *obj;
        struct drm_framebuffer *fb;

        /*
         *      Find the GEM object and thus the gtt range object that is
         *      to back this space
         */
        obj = drm_gem_object_lookup(filp, cmd->handles[0]);
        if (obj == NULL)
                return ERR_PTR(-ENOENT);

        /* Let the core code do all the work */
        fb = psb_framebuffer_create(dev, info, cmd, obj);
        if (IS_ERR(fb))
                drm_gem_object_put(obj);

        return fb;
}

static const struct drm_mode_config_funcs psb_mode_funcs = {
        .fb_create = psb_user_framebuffer_create,
};

static void psb_setup_outputs(struct drm_device *dev)
{
        struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
        struct drm_connector_list_iter conn_iter;
        struct drm_connector *connector;

        drm_mode_create_scaling_mode_property(dev);

        /* It is ok for this to fail - we just don't get backlight control */
        if (!dev_priv->backlight_property)
                dev_priv->backlight_property = drm_property_create_range(dev, 0,
                                                        "backlight", 0, 100);
        dev_priv->ops->output_init(dev);

        drm_connector_list_iter_begin(dev, &conn_iter);
        drm_for_each_connector_iter(connector, &conn_iter) {
                struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
                struct drm_encoder *encoder = &gma_encoder->base;
                int crtc_mask = 0, clone_mask = 0;

                /* valid crtcs */
                switch (gma_encoder->type) {
                case INTEL_OUTPUT_ANALOG:
                        crtc_mask = (1 << 0);
                        clone_mask = (1 << INTEL_OUTPUT_ANALOG);
                        break;
                case INTEL_OUTPUT_SDVO:
                        crtc_mask = dev_priv->ops->sdvo_mask;
                        clone_mask = 0;
                        break;
                case INTEL_OUTPUT_LVDS:
                        crtc_mask = dev_priv->ops->lvds_mask;
                        clone_mask = 0;
                        break;
                case INTEL_OUTPUT_MIPI:
                        crtc_mask = (1 << 0);
                        clone_mask = 0;
                        break;
                case INTEL_OUTPUT_MIPI2:
                        crtc_mask = (1 << 2);
                        clone_mask = 0;
                        break;
                case INTEL_OUTPUT_HDMI:
                        crtc_mask = dev_priv->ops->hdmi_mask;
                        clone_mask = (1 << INTEL_OUTPUT_HDMI);
                        break;
                case INTEL_OUTPUT_DISPLAYPORT:
                        crtc_mask = (1 << 0) | (1 << 1);
                        clone_mask = 0;
                        break;
                case INTEL_OUTPUT_EDP:
                        crtc_mask = (1 << 1);
                        clone_mask = 0;
                }
                encoder->possible_crtcs = crtc_mask;
                encoder->possible_clones =
                    gma_connector_clones(dev, clone_mask);
        }
        drm_connector_list_iter_end(&conn_iter);
}

void psb_modeset_init(struct drm_device *dev)
{
        struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
        struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
        int i;

        if (drmm_mode_config_init(dev))
                return;

        dev->mode_config.min_width = 0;
        dev->mode_config.min_height = 0;

        dev->mode_config.funcs = &psb_mode_funcs;

        /* num pipes is 2 for PSB but 1 for Mrst */
        for (i = 0; i < dev_priv->num_pipe; i++)
                psb_intel_crtc_init(dev, i, mode_dev);

        dev->mode_config.max_width = 4096;
        dev->mode_config.max_height = 4096;

        psb_setup_outputs(dev);

        if (dev_priv->ops->errata)
                dev_priv->ops->errata(dev);

        dev_priv->modeset = true;
}

void psb_modeset_cleanup(struct drm_device *dev)
{
        struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
        if (dev_priv->modeset) {
                drm_kms_helper_poll_fini(dev);
        }
}