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