i915/src/intel_fb.c

/*
 * 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);
}