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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148// SPDX-License-Identifier: GPL-2.0-only/* * Copyright (C) 2012-2013 Avionic Design GmbH * Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved. * * Based on the KMS/FB DMA helpers * Copyright (C) 2012 Analog Devices Inc. */
#include <linux/console.h>#include <linux/fb.h>#include <linux/vmalloc.h>
#include <drm/drm_drv.h>#include <drm/drm_crtc_helper.h>#include <drm/drm_fb_helper.h>#include <drm/drm_fourcc.h>#include <drm/drm_framebuffer.h>#include <drm/drm_gem_framebuffer_helper.h>#include <drm/drm_modeset_helper.h>
#include "drm.h"#include "gem.h"
static int tegra_fb_mmap(struct fb_info *info, struct vm_area_struct *vma){ struct drm_fb_helper *helper = info->par; struct tegra_bo *bo; int err;
bo = tegra_fb_get_plane(helper->fb, 0);
err = drm_gem_mmap_obj(&bo->gem, bo->gem.size, vma); if (err < 0) return err;
return __tegra_gem_mmap(&bo->gem, vma);}
static void tegra_fbdev_fb_destroy(struct fb_info *info){ struct drm_fb_helper *helper = info->par; struct tegra_bo *bo = tegra_fb_get_plane(helper->fb, 0);
drm_fb_helper_fini(helper);
/* Undo the special mapping we made in fbdev probe. */ if (bo->pages) { vunmap(bo->vaddr); bo->vaddr = NULL; }
drm_client_buffer_delete(helper->buffer); drm_client_release(&helper->client);}
static const struct fb_ops tegra_fb_ops = { .owner = THIS_MODULE, __FB_DEFAULT_DMAMEM_OPS_RDWR, DRM_FB_HELPER_DEFAULT_OPS, __FB_DEFAULT_DMAMEM_OPS_DRAW, .fb_mmap = tegra_fb_mmap, .fb_destroy = tegra_fbdev_fb_destroy,};
static const struct drm_fb_helper_funcs tegra_fbdev_helper_funcs = {};
int tegra_fbdev_driver_fbdev_probe(struct drm_fb_helper *helper, struct drm_fb_helper_surface_size *sizes){ struct drm_client_dev *client = &helper->client; struct drm_device *drm = client->dev; struct drm_file *file = client->file; struct tegra_drm *tegra = drm->dev_private; struct fb_info *info = helper->info; u32 fourcc, pitch; u64 size; const struct drm_format_info *format; struct tegra_bo *bo; struct drm_gem_object *gem; u32 handle; struct drm_client_buffer *buffer; int err;
fourcc = drm_mode_legacy_fb_format(sizes->surface_bpp, sizes->surface_depth); format = drm_get_format_info(drm, fourcc, DRM_FORMAT_MOD_LINEAR); pitch = round_up(drm_format_info_min_pitch(format, 0, sizes->surface_width), tegra->pitch_align); size = ALIGN(pitch * sizes->surface_height, PAGE_SIZE);
bo = tegra_bo_create(drm, size, 0); if (IS_ERR(bo)) return PTR_ERR(bo); gem = &bo->gem;
err = drm_gem_handle_create(file, gem, &handle); if (err) goto err_drm_gem_object_put;
buffer = drm_client_buffer_create(client, sizes->surface_width, sizes->surface_height, fourcc, handle, pitch); if (IS_ERR(buffer)) { err = PTR_ERR(buffer); goto err_drm_gem_handle_delete; }
helper->funcs = &tegra_fbdev_helper_funcs; helper->buffer = buffer; helper->fb = buffer->fb;
info->fbops = &tegra_fb_ops;
drm_fb_helper_fill_info(info, helper, sizes);
if (bo->pages) { bo->vaddr = vmap(bo->pages, bo->num_pages, VM_MAP, pgprot_writecombine(PAGE_KERNEL)); if (!bo->vaddr) { dev_err(drm->dev, "failed to vmap() framebuffer\n"); err = -ENOMEM; goto err_drm_client_buffer_delete; } }
info->flags |= FBINFO_VIRTFB; info->screen_buffer = bo->vaddr; info->screen_size = gem->size; info->fix.smem_start = (unsigned long)(bo->iova); info->fix.smem_len = gem->size;
/* The handle is only needed for creating the framebuffer. */ drm_gem_handle_delete(file, handle);
/* The framebuffer still holds a reference on the GEM object. */ drm_gem_object_put(gem);
return 0;
err_drm_client_buffer_delete: drm_client_buffer_delete(buffer);err_drm_gem_handle_delete: drm_gem_handle_delete(file, handle);err_drm_gem_object_put: drm_gem_object_put(gem); return err;}