drm/tegra: Move driver to DRM tree
In order to make subsystem-wide changes easier, move the Tegra DRM driver back into the DRM tree. Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Thierry Reding
372
drivers/gpu/drm/tegra/fb.c
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372
drivers/gpu/drm/tegra/fb.c
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/*
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* Copyright (C) 2012-2013 Avionic Design GmbH
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* Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved.
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*
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* Based on the KMS/FB CMA helpers
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* Copyright (C) 2012 Analog Device Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include "drm.h"
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#include "gem.h"
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static inline struct tegra_fb *to_tegra_fb(struct drm_framebuffer *fb)
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{
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return container_of(fb, struct tegra_fb, base);
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}
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static inline struct tegra_fbdev *to_tegra_fbdev(struct drm_fb_helper *helper)
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{
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return container_of(helper, struct tegra_fbdev, base);
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}
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struct tegra_bo *tegra_fb_get_plane(struct drm_framebuffer *framebuffer,
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unsigned int index)
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{
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struct tegra_fb *fb = to_tegra_fb(framebuffer);
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if (index >= drm_format_num_planes(framebuffer->pixel_format))
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return NULL;
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return fb->planes[index];
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}
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static void tegra_fb_destroy(struct drm_framebuffer *framebuffer)
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{
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struct tegra_fb *fb = to_tegra_fb(framebuffer);
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unsigned int i;
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for (i = 0; i < fb->num_planes; i++) {
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struct tegra_bo *bo = fb->planes[i];
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if (bo)
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drm_gem_object_unreference_unlocked(&bo->gem);
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}
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drm_framebuffer_cleanup(framebuffer);
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kfree(fb->planes);
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kfree(fb);
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}
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static int tegra_fb_create_handle(struct drm_framebuffer *framebuffer,
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struct drm_file *file, unsigned int *handle)
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{
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struct tegra_fb *fb = to_tegra_fb(framebuffer);
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return drm_gem_handle_create(file, &fb->planes[0]->gem, handle);
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}
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static struct drm_framebuffer_funcs tegra_fb_funcs = {
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.destroy = tegra_fb_destroy,
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.create_handle = tegra_fb_create_handle,
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};
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static struct tegra_fb *tegra_fb_alloc(struct drm_device *drm,
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struct drm_mode_fb_cmd2 *mode_cmd,
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struct tegra_bo **planes,
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unsigned int num_planes)
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{
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struct tegra_fb *fb;
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unsigned int i;
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int err;
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fb = kzalloc(sizeof(*fb), GFP_KERNEL);
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if (!fb)
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return ERR_PTR(-ENOMEM);
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fb->planes = kzalloc(num_planes * sizeof(*planes), GFP_KERNEL);
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if (!fb->planes)
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return ERR_PTR(-ENOMEM);
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fb->num_planes = num_planes;
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drm_helper_mode_fill_fb_struct(&fb->base, mode_cmd);
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for (i = 0; i < fb->num_planes; i++)
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fb->planes[i] = planes[i];
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err = drm_framebuffer_init(drm, &fb->base, &tegra_fb_funcs);
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if (err < 0) {
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dev_err(drm->dev, "failed to initialize framebuffer: %d\n",
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err);
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kfree(fb->planes);
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kfree(fb);
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return ERR_PTR(err);
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}
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return fb;
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}
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static struct drm_framebuffer *tegra_fb_create(struct drm_device *drm,
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struct drm_file *file,
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struct drm_mode_fb_cmd2 *cmd)
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{
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unsigned int hsub, vsub, i;
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struct tegra_bo *planes[4];
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struct drm_gem_object *gem;
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struct tegra_fb *fb;
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int err;
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hsub = drm_format_horz_chroma_subsampling(cmd->pixel_format);
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vsub = drm_format_vert_chroma_subsampling(cmd->pixel_format);
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for (i = 0; i < drm_format_num_planes(cmd->pixel_format); i++) {
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unsigned int width = cmd->width / (i ? hsub : 1);
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unsigned int height = cmd->height / (i ? vsub : 1);
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unsigned int size, bpp;
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gem = drm_gem_object_lookup(drm, file, cmd->handles[i]);
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if (!gem) {
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err = -ENXIO;
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goto unreference;
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}
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bpp = drm_format_plane_cpp(cmd->pixel_format, i);
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size = (height - 1) * cmd->pitches[i] +
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width * bpp + cmd->offsets[i];
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if (gem->size < size) {
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err = -EINVAL;
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goto unreference;
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}
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planes[i] = to_tegra_bo(gem);
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}
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fb = tegra_fb_alloc(drm, cmd, planes, i);
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if (IS_ERR(fb)) {
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err = PTR_ERR(fb);
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goto unreference;
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}
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return &fb->base;
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unreference:
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while (i--)
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drm_gem_object_unreference_unlocked(&planes[i]->gem);
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return ERR_PTR(err);
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}
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static struct fb_ops tegra_fb_ops = {
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.owner = THIS_MODULE,
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.fb_fillrect = sys_fillrect,
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.fb_copyarea = sys_copyarea,
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.fb_imageblit = sys_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 tegra_fbdev_probe(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 tegra_fbdev *fbdev = to_tegra_fbdev(helper);
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struct drm_device *drm = helper->dev;
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struct drm_mode_fb_cmd2 cmd = { 0 };
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unsigned int bytes_per_pixel;
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struct drm_framebuffer *fb;
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unsigned long offset;
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struct fb_info *info;
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struct tegra_bo *bo;
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size_t size;
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int err;
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bytes_per_pixel = DIV_ROUND_UP(sizes->surface_bpp, 8);
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cmd.width = sizes->surface_width;
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cmd.height = sizes->surface_height;
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cmd.pitches[0] = sizes->surface_width * bytes_per_pixel;
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cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
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sizes->surface_depth);
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size = cmd.pitches[0] * cmd.height;
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bo = tegra_bo_create(drm, size);
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if (IS_ERR(bo))
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return PTR_ERR(bo);
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info = framebuffer_alloc(0, drm->dev);
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if (!info) {
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dev_err(drm->dev, "failed to allocate framebuffer info\n");
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tegra_bo_free_object(&bo->gem);
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return -ENOMEM;
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}
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fbdev->fb = tegra_fb_alloc(drm, &cmd, &bo, 1);
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if (IS_ERR(fbdev->fb)) {
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dev_err(drm->dev, "failed to allocate DRM framebuffer\n");
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err = PTR_ERR(fbdev->fb);
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goto release;
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}
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fb = &fbdev->fb->base;
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helper->fb = fb;
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helper->fbdev = info;
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info->par = helper;
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info->flags = FBINFO_FLAG_DEFAULT;
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info->fbops = &tegra_fb_ops;
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err = fb_alloc_cmap(&info->cmap, 256, 0);
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if (err < 0) {
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dev_err(drm->dev, "failed to allocate color map: %d\n", err);
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goto destroy;
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}
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drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
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drm_fb_helper_fill_var(info, helper, fb->width, fb->height);
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offset = info->var.xoffset * bytes_per_pixel +
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info->var.yoffset * fb->pitches[0];
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drm->mode_config.fb_base = (resource_size_t)bo->paddr;
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info->screen_base = bo->vaddr + offset;
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info->screen_size = size;
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info->fix.smem_start = (unsigned long)(bo->paddr + offset);
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info->fix.smem_len = size;
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return 0;
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destroy:
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drm_framebuffer_unregister_private(fb);
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tegra_fb_destroy(fb);
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release:
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framebuffer_release(info);
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return err;
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}
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static struct drm_fb_helper_funcs tegra_fb_helper_funcs = {
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.fb_probe = tegra_fbdev_probe,
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};
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static struct tegra_fbdev *tegra_fbdev_create(struct drm_device *drm,
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unsigned int preferred_bpp,
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unsigned int num_crtc,
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unsigned int max_connectors)
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{
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struct drm_fb_helper *helper;
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struct tegra_fbdev *fbdev;
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int err;
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fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
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if (!fbdev) {
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dev_err(drm->dev, "failed to allocate DRM fbdev\n");
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return ERR_PTR(-ENOMEM);
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}
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fbdev->base.funcs = &tegra_fb_helper_funcs;
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helper = &fbdev->base;
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err = drm_fb_helper_init(drm, &fbdev->base, num_crtc, max_connectors);
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if (err < 0) {
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dev_err(drm->dev, "failed to initialize DRM FB helper\n");
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goto free;
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}
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err = drm_fb_helper_single_add_all_connectors(&fbdev->base);
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if (err < 0) {
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dev_err(drm->dev, "failed to add connectors\n");
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goto fini;
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}
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drm_helper_disable_unused_functions(drm);
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err = drm_fb_helper_initial_config(&fbdev->base, preferred_bpp);
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if (err < 0) {
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dev_err(drm->dev, "failed to set initial configuration\n");
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goto fini;
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}
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return fbdev;
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fini:
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drm_fb_helper_fini(&fbdev->base);
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free:
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kfree(fbdev);
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return ERR_PTR(err);
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}
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static void tegra_fbdev_free(struct tegra_fbdev *fbdev)
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{
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struct fb_info *info = fbdev->base.fbdev;
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if (info) {
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int err;
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err = unregister_framebuffer(info);
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if (err < 0)
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DRM_DEBUG_KMS("failed to unregister framebuffer\n");
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if (info->cmap.len)
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fb_dealloc_cmap(&info->cmap);
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framebuffer_release(info);
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}
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if (fbdev->fb) {
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drm_framebuffer_unregister_private(&fbdev->fb->base);
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tegra_fb_destroy(&fbdev->fb->base);
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}
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drm_fb_helper_fini(&fbdev->base);
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kfree(fbdev);
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}
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static void tegra_fb_output_poll_changed(struct drm_device *drm)
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{
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struct tegra_drm *tegra = drm->dev_private;
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if (tegra->fbdev)
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drm_fb_helper_hotplug_event(&tegra->fbdev->base);
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}
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static const struct drm_mode_config_funcs tegra_drm_mode_funcs = {
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.fb_create = tegra_fb_create,
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.output_poll_changed = tegra_fb_output_poll_changed,
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};
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int tegra_drm_fb_init(struct drm_device *drm)
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{
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struct tegra_drm *tegra = drm->dev_private;
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struct tegra_fbdev *fbdev;
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drm->mode_config.min_width = 0;
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drm->mode_config.min_height = 0;
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drm->mode_config.max_width = 4096;
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drm->mode_config.max_height = 4096;
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drm->mode_config.funcs = &tegra_drm_mode_funcs;
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fbdev = tegra_fbdev_create(drm, 32, drm->mode_config.num_crtc,
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drm->mode_config.num_connector);
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if (IS_ERR(fbdev))
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return PTR_ERR(fbdev);
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tegra->fbdev = fbdev;
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return 0;
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}
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void tegra_drm_fb_exit(struct drm_device *drm)
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{
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struct tegra_drm *tegra = drm->dev_private;
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tegra_fbdev_free(tegra->fbdev);
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}
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void tegra_fbdev_restore_mode(struct tegra_fbdev *fbdev)
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{
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if (fbdev) {
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drm_modeset_lock_all(fbdev->base.dev);
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drm_fb_helper_restore_fbdev_mode(&fbdev->base);
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drm_modeset_unlock_all(fbdev->base.dev);
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}
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}
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