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- /* exynos_drm_fbdev.c
- *
- * Copyright (c) 2011 Samsung Electronics Co., Ltd.
- * Authors:
- * Inki Dae <inki.dae@samsung.com>
- * Joonyoung Shim <jy0922.shim@samsung.com>
- * Seung-Woo Kim <sw0312.kim@samsung.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- */
- #include <drm/drmP.h>
- #include <drm/drm_crtc.h>
- #include <drm/drm_fb_helper.h>
- #include <drm/drm_crtc_helper.h>
- #include <drm/exynos_drm.h>
- #include <linux/console.h>
- #include "exynos_drm_drv.h"
- #include "exynos_drm_fb.h"
- #include "exynos_drm_fbdev.h"
- #include "exynos_drm_iommu.h"
- #define MAX_CONNECTOR 4
- #define PREFERRED_BPP 32
- #define to_exynos_fbdev(x) container_of(x, struct exynos_drm_fbdev,\
- drm_fb_helper)
- struct exynos_drm_fbdev {
- struct drm_fb_helper drm_fb_helper;
- struct exynos_drm_gem *exynos_gem;
- };
- static int exynos_drm_fb_mmap(struct fb_info *info,
- struct vm_area_struct *vma)
- {
- struct drm_fb_helper *helper = info->par;
- struct exynos_drm_fbdev *exynos_fbd = to_exynos_fbdev(helper);
- struct exynos_drm_gem *exynos_gem = exynos_fbd->exynos_gem;
- unsigned long vm_size;
- int ret;
- vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP;
- vm_size = vma->vm_end - vma->vm_start;
- if (vm_size > exynos_gem->size)
- return -EINVAL;
- ret = dma_mmap_attrs(to_dma_dev(helper->dev), vma, exynos_gem->cookie,
- exynos_gem->dma_addr, exynos_gem->size,
- exynos_gem->dma_attrs);
- if (ret < 0) {
- DRM_ERROR("failed to mmap.\n");
- return ret;
- }
- return 0;
- }
- static struct fb_ops exynos_drm_fb_ops = {
- .owner = THIS_MODULE,
- DRM_FB_HELPER_DEFAULT_OPS,
- .fb_mmap = exynos_drm_fb_mmap,
- .fb_fillrect = drm_fb_helper_cfb_fillrect,
- .fb_copyarea = drm_fb_helper_cfb_copyarea,
- .fb_imageblit = drm_fb_helper_cfb_imageblit,
- };
- static int exynos_drm_fbdev_update(struct drm_fb_helper *helper,
- struct drm_fb_helper_surface_size *sizes,
- struct exynos_drm_gem *exynos_gem)
- {
- struct fb_info *fbi;
- struct drm_framebuffer *fb = helper->fb;
- unsigned int size = fb->width * fb->height * fb->format->cpp[0];
- unsigned int nr_pages;
- unsigned long offset;
- fbi = drm_fb_helper_alloc_fbi(helper);
- if (IS_ERR(fbi)) {
- DRM_ERROR("failed to allocate fb info.\n");
- return PTR_ERR(fbi);
- }
- fbi->par = helper;
- fbi->flags = FBINFO_FLAG_DEFAULT;
- fbi->fbops = &exynos_drm_fb_ops;
- drm_fb_helper_fill_fix(fbi, fb->pitches[0], fb->format->depth);
- drm_fb_helper_fill_var(fbi, helper, sizes->fb_width, sizes->fb_height);
- nr_pages = exynos_gem->size >> PAGE_SHIFT;
- exynos_gem->kvaddr = (void __iomem *) vmap(exynos_gem->pages, nr_pages,
- VM_MAP, pgprot_writecombine(PAGE_KERNEL));
- if (!exynos_gem->kvaddr) {
- DRM_ERROR("failed to map pages to kernel space.\n");
- return -EIO;
- }
- offset = fbi->var.xoffset * fb->format->cpp[0];
- offset += fbi->var.yoffset * fb->pitches[0];
- fbi->screen_base = exynos_gem->kvaddr + offset;
- fbi->screen_size = size;
- fbi->fix.smem_len = size;
- return 0;
- }
- static int exynos_drm_fbdev_create(struct drm_fb_helper *helper,
- struct drm_fb_helper_surface_size *sizes)
- {
- struct exynos_drm_fbdev *exynos_fbdev = to_exynos_fbdev(helper);
- struct exynos_drm_gem *exynos_gem;
- struct drm_device *dev = helper->dev;
- struct drm_mode_fb_cmd2 mode_cmd = { 0 };
- unsigned long size;
- int ret;
- DRM_DEBUG_KMS("surface width(%d), height(%d) and bpp(%d\n",
- sizes->surface_width, sizes->surface_height,
- sizes->surface_bpp);
- mode_cmd.width = sizes->surface_width;
- mode_cmd.height = sizes->surface_height;
- mode_cmd.pitches[0] = sizes->surface_width * (sizes->surface_bpp >> 3);
- mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
- sizes->surface_depth);
- size = mode_cmd.pitches[0] * mode_cmd.height;
- exynos_gem = exynos_drm_gem_create(dev, EXYNOS_BO_CONTIG, size);
- /*
- * If physically contiguous memory allocation fails and if IOMMU is
- * supported then try to get buffer from non physically contiguous
- * memory area.
- */
- if (IS_ERR(exynos_gem) && is_drm_iommu_supported(dev)) {
- dev_warn(dev->dev, "contiguous FB allocation failed, falling back to non-contiguous\n");
- exynos_gem = exynos_drm_gem_create(dev, EXYNOS_BO_NONCONTIG,
- size);
- }
- if (IS_ERR(exynos_gem))
- return PTR_ERR(exynos_gem);
- exynos_fbdev->exynos_gem = exynos_gem;
- helper->fb =
- exynos_drm_framebuffer_init(dev, &mode_cmd, &exynos_gem, 1);
- if (IS_ERR(helper->fb)) {
- DRM_ERROR("failed to create drm framebuffer.\n");
- ret = PTR_ERR(helper->fb);
- goto err_destroy_gem;
- }
- ret = exynos_drm_fbdev_update(helper, sizes, exynos_gem);
- if (ret < 0)
- goto err_destroy_framebuffer;
- return ret;
- err_destroy_framebuffer:
- drm_framebuffer_cleanup(helper->fb);
- err_destroy_gem:
- exynos_drm_gem_destroy(exynos_gem);
- /*
- * if failed, all resources allocated above would be released by
- * drm_mode_config_cleanup() when drm_load() had been called prior
- * to any specific driver such as fimd or hdmi driver.
- */
- return ret;
- }
- static const struct drm_fb_helper_funcs exynos_drm_fb_helper_funcs = {
- .fb_probe = exynos_drm_fbdev_create,
- };
- int exynos_drm_fbdev_init(struct drm_device *dev)
- {
- struct exynos_drm_fbdev *fbdev;
- struct exynos_drm_private *private = dev->dev_private;
- struct drm_fb_helper *helper;
- int ret;
- if (!dev->mode_config.num_crtc || !dev->mode_config.num_connector)
- return 0;
- fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
- if (!fbdev)
- return -ENOMEM;
- private->fb_helper = helper = &fbdev->drm_fb_helper;
- drm_fb_helper_prepare(dev, helper, &exynos_drm_fb_helper_funcs);
- ret = drm_fb_helper_init(dev, helper, MAX_CONNECTOR);
- if (ret < 0) {
- DRM_ERROR("failed to initialize drm fb helper.\n");
- goto err_init;
- }
- ret = drm_fb_helper_single_add_all_connectors(helper);
- if (ret < 0) {
- DRM_ERROR("failed to register drm_fb_helper_connector.\n");
- goto err_setup;
- }
- ret = drm_fb_helper_initial_config(helper, PREFERRED_BPP);
- if (ret < 0) {
- DRM_ERROR("failed to set up hw configuration.\n");
- goto err_setup;
- }
- return 0;
- err_setup:
- drm_fb_helper_fini(helper);
- err_init:
- private->fb_helper = NULL;
- kfree(fbdev);
- return ret;
- }
- static void exynos_drm_fbdev_destroy(struct drm_device *dev,
- struct drm_fb_helper *fb_helper)
- {
- struct exynos_drm_fbdev *exynos_fbd = to_exynos_fbdev(fb_helper);
- struct exynos_drm_gem *exynos_gem = exynos_fbd->exynos_gem;
- struct drm_framebuffer *fb;
- vunmap(exynos_gem->kvaddr);
- /* release drm framebuffer and real buffer */
- if (fb_helper->fb && fb_helper->fb->funcs) {
- fb = fb_helper->fb;
- if (fb)
- drm_framebuffer_remove(fb);
- }
- drm_fb_helper_unregister_fbi(fb_helper);
- drm_fb_helper_fini(fb_helper);
- }
- void exynos_drm_fbdev_fini(struct drm_device *dev)
- {
- struct exynos_drm_private *private = dev->dev_private;
- struct exynos_drm_fbdev *fbdev;
- if (!private || !private->fb_helper)
- return;
- fbdev = to_exynos_fbdev(private->fb_helper);
- exynos_drm_fbdev_destroy(dev, private->fb_helper);
- kfree(fbdev);
- private->fb_helper = NULL;
- }
- void exynos_drm_fbdev_restore_mode(struct drm_device *dev)
- {
- struct exynos_drm_private *private = dev->dev_private;
- if (!private || !private->fb_helper)
- return;
- drm_fb_helper_restore_fbdev_mode_unlocked(private->fb_helper);
- }
- void exynos_drm_output_poll_changed(struct drm_device *dev)
- {
- struct exynos_drm_private *private = dev->dev_private;
- struct drm_fb_helper *fb_helper = private->fb_helper;
- drm_fb_helper_hotplug_event(fb_helper);
- }
- void exynos_drm_fbdev_suspend(struct drm_device *dev)
- {
- struct exynos_drm_private *private = dev->dev_private;
- console_lock();
- drm_fb_helper_set_suspend(private->fb_helper, 1);
- console_unlock();
- }
- void exynos_drm_fbdev_resume(struct drm_device *dev)
- {
- struct exynos_drm_private *private = dev->dev_private;
- console_lock();
- drm_fb_helper_set_suspend(private->fb_helper, 0);
- console_unlock();
- }
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