/drivers/gpu/drm/i915/intel_fb.c
C | 313 lines | 217 code | 56 blank | 40 comment | 25 complexity | c21f8a0af98c88e4e517e25723827eda MD5 | raw file
- /*
- * 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 <linux/module.h>
- #include <linux/kernel.h>
- #include <linux/errno.h>
- #include <linux/string.h>
- #include <linux/mm.h>
- #include <linux/tty.h>
- #include <linux/sysrq.h>
- #include <linux/delay.h>
- #include <linux/fb.h>
- #include <linux/init.h>
- #include <linux/vga_switcheroo.h>
- #include <drm/drmP.h>
- #include <drm/drm_crtc.h>
- #include <drm/drm_fb_helper.h>
- #include "intel_drv.h"
- #include <drm/i915_drm.h>
- #include "i915_drv.h"
- static struct fb_ops intelfb_ops = {
- .owner = THIS_MODULE,
- .fb_check_var = drm_fb_helper_check_var,
- .fb_set_par = drm_fb_helper_set_par,
- .fb_fillrect = cfb_fillrect,
- .fb_copyarea = cfb_copyarea,
- .fb_imageblit = cfb_imageblit,
- .fb_pan_display = drm_fb_helper_pan_display,
- .fb_blank = drm_fb_helper_blank,
- .fb_setcmap = drm_fb_helper_setcmap,
- .fb_debug_enter = drm_fb_helper_debug_enter,
- .fb_debug_leave = drm_fb_helper_debug_leave,
- };
- 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 fb_info *info;
- struct drm_framebuffer *fb;
- struct drm_mode_fb_cmd2 mode_cmd = {};
- struct drm_i915_gem_object *obj;
- struct device *device = &dev->pdev->dev;
- int size, ret;
- /* we don't do packed 24bpp */
- if (sizes->surface_bpp == 24)
- sizes->surface_bpp = 32;
- 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 = i915_gem_object_create_stolen(dev, size);
- if (obj == NULL)
- obj = i915_gem_alloc_object(dev, size);
- if (!obj) {
- DRM_ERROR("failed to allocate framebuffer\n");
- ret = -ENOMEM;
- goto out;
- }
- mutex_lock(&dev->struct_mutex);
- /* Flush everything out, we'll be doing GTT only from now on */
- ret = intel_pin_and_fence_fb_obj(dev, obj, NULL);
- if (ret) {
- DRM_ERROR("failed to pin fb: %d\n", ret);
- goto out_unref;
- }
- info = framebuffer_alloc(0, device);
- if (!info) {
- ret = -ENOMEM;
- goto out_unpin;
- }
- info->par = ifbdev;
- ret = intel_framebuffer_init(dev, &ifbdev->ifb, &mode_cmd, obj);
- if (ret)
- goto out_unpin;
- fb = &ifbdev->ifb.base;
- ifbdev->helper.fb = fb;
- ifbdev->helper.fbdev = info;
- strcpy(info->fix.id, "inteldrmfb");
- info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
- info->fbops = &intelfb_ops;
- ret = fb_alloc_cmap(&info->cmap, 256, 0);
- if (ret) {
- ret = -ENOMEM;
- goto out_unpin;
- }
- /* setup aperture base/size for vesafb takeover */
- info->apertures = alloc_apertures(1);
- if (!info->apertures) {
- ret = -ENOMEM;
- goto out_unpin;
- }
- info->apertures->ranges[0].base = dev->mode_config.fb_base;
- info->apertures->ranges[0].size = dev_priv->gtt.mappable_end;
- info->fix.smem_start = dev->mode_config.fb_base + obj->gtt_offset;
- info->fix.smem_len = size;
- info->screen_base =
- ioremap_wc(dev_priv->gtt.mappable_base + obj->gtt_offset,
- size);
- if (!info->screen_base) {
- ret = -ENOSPC;
- goto out_unpin;
- }
- info->screen_size = size;
- /* This driver doesn't need a VT switch to restore the mode on resume */
- info->skip_vt_switch = true;
- drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
- drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
- /* If the object is shmemfs backed, it will have given us zeroed pages.
- * If the object is stolen however, it will be full of whatever
- * garbage was left in there.
- */
- if (ifbdev->ifb.obj->stolen)
- memset_io(info->screen_base, 0, info->screen_size);
- /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
- DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08x, bo %p\n",
- fb->width, fb->height,
- obj->gtt_offset, obj);
- mutex_unlock(&dev->struct_mutex);
- vga_switcheroo_client_fb_set(dev->pdev, info);
- 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 fb_info *info;
- struct intel_framebuffer *ifb = &ifbdev->ifb;
- if (ifbdev->helper.fbdev) {
- info = ifbdev->helper.fbdev;
- unregister_framebuffer(info);
- iounmap(info->screen_base);
- if (info->cmap.len)
- fb_dealloc_cmap(&info->cmap);
- framebuffer_release(info);
- }
- 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;
- drm_i915_private_t *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);
- return ret;
- }
- drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
- return 0;
- }
- void intel_fbdev_initial_config(struct drm_device *dev)
- {
- drm_i915_private_t *dev_priv = dev->dev_private;
- /* Due to peculiar init order wrt to hpd handling this is separate. */
- drm_fb_helper_initial_config(&dev_priv->fbdev->helper, 32);
- }
- void intel_fbdev_fini(struct drm_device *dev)
- {
- drm_i915_private_t *dev_priv = dev->dev_private;
- if (!dev_priv->fbdev)
- return;
- intel_fbdev_destroy(dev, dev_priv->fbdev);
- kfree(dev_priv->fbdev);
- dev_priv->fbdev = NULL;
- }
- void intel_fbdev_set_suspend(struct drm_device *dev, int state)
- {
- drm_i915_private_t *dev_priv = dev->dev_private;
- struct intel_fbdev *ifbdev = dev_priv->fbdev;
- struct fb_info *info;
- if (!ifbdev)
- return;
- info = ifbdev->helper.fbdev;
- /* On resume from hibernation: If the object is shmemfs backed, it has
- * been restored from swap. If the object is stolen however, it will be
- * full of whatever garbage was left in there.
- */
- if (!state && ifbdev->ifb.obj->stolen)
- memset_io(info->screen_base, 0, info->screen_size);
- fb_set_suspend(info, state);
- }
- MODULE_LICENSE("GPL and additional rights");
- void intel_fb_output_poll_changed(struct drm_device *dev)
- {
- drm_i915_private_t *dev_priv = dev->dev_private;
- drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
- }
- void intel_fb_restore_mode(struct drm_device *dev)
- {
- int ret;
- drm_i915_private_t *dev_priv = dev->dev_private;
- struct drm_mode_config *config = &dev->mode_config;
- struct drm_plane *plane;
- 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");
- /* Be sure to shut off any planes that may be active */
- list_for_each_entry(plane, &config->plane_list, head)
- if (plane->enabled)
- plane->funcs->disable_plane(plane);
- drm_modeset_unlock_all(dev);
- }