2 * Copyright (C) 2012-2013 Avionic Design GmbH
3 * Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved.
5 * Based on the KMS/FB CMA helpers
6 * Copyright (C) 2012 Analog Device Inc.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
16 static inline struct tegra_fb *to_tegra_fb(struct drm_framebuffer *fb)
18 return container_of(fb, struct tegra_fb, base);
21 #ifdef CONFIG_DRM_TEGRA_FBDEV
22 static inline struct tegra_fbdev *to_tegra_fbdev(struct drm_fb_helper *helper)
24 return container_of(helper, struct tegra_fbdev, base);
28 struct tegra_bo *tegra_fb_get_plane(struct drm_framebuffer *framebuffer,
31 struct tegra_fb *fb = to_tegra_fb(framebuffer);
33 if (index >= drm_format_num_planes(framebuffer->pixel_format))
36 return fb->planes[index];
39 bool tegra_fb_is_bottom_up(struct drm_framebuffer *framebuffer)
41 struct tegra_fb *fb = to_tegra_fb(framebuffer);
43 if (fb->planes[0]->flags & TEGRA_BO_BOTTOM_UP)
49 int tegra_fb_get_tiling(struct drm_framebuffer *framebuffer,
50 struct tegra_bo_tiling *tiling)
52 struct tegra_fb *fb = to_tegra_fb(framebuffer);
54 /* TODO: handle YUV formats? */
55 *tiling = fb->planes[0]->tiling;
60 static void tegra_fb_destroy(struct drm_framebuffer *framebuffer)
62 struct tegra_fb *fb = to_tegra_fb(framebuffer);
65 for (i = 0; i < fb->num_planes; i++) {
66 struct tegra_bo *bo = fb->planes[i];
69 drm_gem_object_unreference_unlocked(&bo->gem);
72 drm_framebuffer_cleanup(framebuffer);
77 static int tegra_fb_create_handle(struct drm_framebuffer *framebuffer,
78 struct drm_file *file, unsigned int *handle)
80 struct tegra_fb *fb = to_tegra_fb(framebuffer);
82 return drm_gem_handle_create(file, &fb->planes[0]->gem, handle);
85 static struct drm_framebuffer_funcs tegra_fb_funcs = {
86 .destroy = tegra_fb_destroy,
87 .create_handle = tegra_fb_create_handle,
90 static struct tegra_fb *tegra_fb_alloc(struct drm_device *drm,
91 struct drm_mode_fb_cmd2 *mode_cmd,
92 struct tegra_bo **planes,
93 unsigned int num_planes)
99 fb = kzalloc(sizeof(*fb), GFP_KERNEL);
101 return ERR_PTR(-ENOMEM);
103 fb->planes = kzalloc(num_planes * sizeof(*planes), GFP_KERNEL);
106 return ERR_PTR(-ENOMEM);
109 fb->num_planes = num_planes;
111 drm_helper_mode_fill_fb_struct(&fb->base, mode_cmd);
113 for (i = 0; i < fb->num_planes; i++)
114 fb->planes[i] = planes[i];
116 err = drm_framebuffer_init(drm, &fb->base, &tegra_fb_funcs);
118 dev_err(drm->dev, "failed to initialize framebuffer: %d\n",
128 static struct drm_framebuffer *tegra_fb_create(struct drm_device *drm,
129 struct drm_file *file,
130 struct drm_mode_fb_cmd2 *cmd)
132 unsigned int hsub, vsub, i;
133 struct tegra_bo *planes[4];
134 struct drm_gem_object *gem;
138 hsub = drm_format_horz_chroma_subsampling(cmd->pixel_format);
139 vsub = drm_format_vert_chroma_subsampling(cmd->pixel_format);
141 for (i = 0; i < drm_format_num_planes(cmd->pixel_format); i++) {
142 unsigned int width = cmd->width / (i ? hsub : 1);
143 unsigned int height = cmd->height / (i ? vsub : 1);
144 unsigned int size, bpp;
146 gem = drm_gem_object_lookup(drm, file, cmd->handles[i]);
152 bpp = drm_format_plane_cpp(cmd->pixel_format, i);
154 size = (height - 1) * cmd->pitches[i] +
155 width * bpp + cmd->offsets[i];
157 if (gem->size < size) {
162 planes[i] = to_tegra_bo(gem);
165 fb = tegra_fb_alloc(drm, cmd, planes, i);
175 drm_gem_object_unreference_unlocked(&planes[i]->gem);
180 #ifdef CONFIG_DRM_TEGRA_FBDEV
181 static struct fb_ops tegra_fb_ops = {
182 .owner = THIS_MODULE,
183 .fb_fillrect = sys_fillrect,
184 .fb_copyarea = sys_copyarea,
185 .fb_imageblit = sys_imageblit,
186 .fb_check_var = drm_fb_helper_check_var,
187 .fb_set_par = drm_fb_helper_set_par,
188 .fb_blank = drm_fb_helper_blank,
189 .fb_pan_display = drm_fb_helper_pan_display,
190 .fb_setcmap = drm_fb_helper_setcmap,
193 static int tegra_fbdev_probe(struct drm_fb_helper *helper,
194 struct drm_fb_helper_surface_size *sizes)
196 struct tegra_fbdev *fbdev = to_tegra_fbdev(helper);
197 struct tegra_drm *tegra = helper->dev->dev_private;
198 struct drm_device *drm = helper->dev;
199 struct drm_mode_fb_cmd2 cmd = { 0 };
200 unsigned int bytes_per_pixel;
201 struct drm_framebuffer *fb;
202 unsigned long offset;
203 struct fb_info *info;
208 bytes_per_pixel = DIV_ROUND_UP(sizes->surface_bpp, 8);
210 cmd.width = sizes->surface_width;
211 cmd.height = sizes->surface_height;
212 cmd.pitches[0] = round_up(sizes->surface_width * bytes_per_pixel,
214 cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
215 sizes->surface_depth);
217 size = cmd.pitches[0] * cmd.height;
219 bo = tegra_bo_create(drm, size, 0);
223 info = framebuffer_alloc(0, drm->dev);
225 dev_err(drm->dev, "failed to allocate framebuffer info\n");
226 tegra_bo_free_object(&bo->gem);
230 fbdev->fb = tegra_fb_alloc(drm, &cmd, &bo, 1);
231 if (IS_ERR(fbdev->fb)) {
232 dev_err(drm->dev, "failed to allocate DRM framebuffer\n");
233 err = PTR_ERR(fbdev->fb);
237 fb = &fbdev->fb->base;
239 helper->fbdev = info;
242 info->flags = FBINFO_FLAG_DEFAULT;
243 info->fbops = &tegra_fb_ops;
245 err = fb_alloc_cmap(&info->cmap, 256, 0);
247 dev_err(drm->dev, "failed to allocate color map: %d\n", err);
251 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
252 drm_fb_helper_fill_var(info, helper, fb->width, fb->height);
254 offset = info->var.xoffset * bytes_per_pixel +
255 info->var.yoffset * fb->pitches[0];
257 drm->mode_config.fb_base = (resource_size_t)bo->paddr;
258 info->screen_base = (void __iomem *)bo->vaddr + offset;
259 info->screen_size = size;
260 info->fix.smem_start = (unsigned long)(bo->paddr + offset);
261 info->fix.smem_len = size;
266 drm_framebuffer_unregister_private(fb);
267 tegra_fb_destroy(fb);
269 framebuffer_release(info);
273 static const struct drm_fb_helper_funcs tegra_fb_helper_funcs = {
274 .fb_probe = tegra_fbdev_probe,
277 static struct tegra_fbdev *tegra_fbdev_create(struct drm_device *drm)
279 struct tegra_fbdev *fbdev;
281 fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
283 dev_err(drm->dev, "failed to allocate DRM fbdev\n");
284 return ERR_PTR(-ENOMEM);
287 drm_fb_helper_prepare(drm, &fbdev->base, &tegra_fb_helper_funcs);
292 static int tegra_fbdev_init(struct tegra_fbdev *fbdev,
293 unsigned int preferred_bpp,
294 unsigned int num_crtc,
295 unsigned int max_connectors)
297 struct drm_device *drm = fbdev->base.dev;
300 err = drm_fb_helper_init(drm, &fbdev->base, num_crtc, max_connectors);
302 dev_err(drm->dev, "failed to initialize DRM FB helper\n");
306 err = drm_fb_helper_single_add_all_connectors(&fbdev->base);
308 dev_err(drm->dev, "failed to add connectors\n");
312 err = drm_fb_helper_initial_config(&fbdev->base, preferred_bpp);
314 dev_err(drm->dev, "failed to set initial configuration\n");
321 drm_fb_helper_fini(&fbdev->base);
325 static void tegra_fbdev_free(struct tegra_fbdev *fbdev)
327 struct fb_info *info = fbdev->base.fbdev;
332 err = unregister_framebuffer(info);
334 DRM_DEBUG_KMS("failed to unregister framebuffer\n");
337 fb_dealloc_cmap(&info->cmap);
339 framebuffer_release(info);
343 drm_framebuffer_unregister_private(&fbdev->fb->base);
344 tegra_fb_destroy(&fbdev->fb->base);
347 drm_fb_helper_fini(&fbdev->base);
351 void tegra_fbdev_restore_mode(struct tegra_fbdev *fbdev)
354 drm_fb_helper_restore_fbdev_mode_unlocked(&fbdev->base);
357 static void tegra_fb_output_poll_changed(struct drm_device *drm)
359 struct tegra_drm *tegra = drm->dev_private;
362 drm_fb_helper_hotplug_event(&tegra->fbdev->base);
366 static const struct drm_mode_config_funcs tegra_drm_mode_funcs = {
367 .fb_create = tegra_fb_create,
368 #ifdef CONFIG_DRM_TEGRA_FBDEV
369 .output_poll_changed = tegra_fb_output_poll_changed,
373 int tegra_drm_fb_prepare(struct drm_device *drm)
375 #ifdef CONFIG_DRM_TEGRA_FBDEV
376 struct tegra_drm *tegra = drm->dev_private;
379 drm->mode_config.min_width = 0;
380 drm->mode_config.min_height = 0;
382 drm->mode_config.max_width = 4096;
383 drm->mode_config.max_height = 4096;
385 drm->mode_config.funcs = &tegra_drm_mode_funcs;
387 #ifdef CONFIG_DRM_TEGRA_FBDEV
388 tegra->fbdev = tegra_fbdev_create(drm);
389 if (IS_ERR(tegra->fbdev))
390 return PTR_ERR(tegra->fbdev);
396 int tegra_drm_fb_init(struct drm_device *drm)
398 #ifdef CONFIG_DRM_TEGRA_FBDEV
399 struct tegra_drm *tegra = drm->dev_private;
402 err = tegra_fbdev_init(tegra->fbdev, 32, drm->mode_config.num_crtc,
403 drm->mode_config.num_connector);
411 void tegra_drm_fb_exit(struct drm_device *drm)
413 #ifdef CONFIG_DRM_TEGRA_FBDEV
414 struct tegra_drm *tegra = drm->dev_private;
416 tegra_fbdev_free(tegra->fbdev);