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.
13 #include <linux/console.h>
18 static inline struct tegra_fb *to_tegra_fb(struct drm_framebuffer *fb)
20 return container_of(fb, struct tegra_fb, base);
23 #ifdef CONFIG_DRM_FBDEV_EMULATION
24 static inline struct tegra_fbdev *to_tegra_fbdev(struct drm_fb_helper *helper)
26 return container_of(helper, struct tegra_fbdev, base);
30 struct tegra_bo *tegra_fb_get_plane(struct drm_framebuffer *framebuffer,
33 struct tegra_fb *fb = to_tegra_fb(framebuffer);
35 if (index >= framebuffer->format->num_planes)
38 return fb->planes[index];
41 bool tegra_fb_is_bottom_up(struct drm_framebuffer *framebuffer)
43 struct tegra_fb *fb = to_tegra_fb(framebuffer);
45 if (fb->planes[0]->flags & TEGRA_BO_BOTTOM_UP)
51 int tegra_fb_get_tiling(struct drm_framebuffer *framebuffer,
52 struct tegra_bo_tiling *tiling)
54 struct tegra_fb *fb = to_tegra_fb(framebuffer);
56 /* TODO: handle YUV formats? */
57 *tiling = fb->planes[0]->tiling;
62 static void tegra_fb_destroy(struct drm_framebuffer *framebuffer)
64 struct tegra_fb *fb = to_tegra_fb(framebuffer);
67 for (i = 0; i < fb->num_planes; i++) {
68 struct tegra_bo *bo = fb->planes[i];
74 drm_gem_object_unreference_unlocked(&bo->gem);
78 drm_framebuffer_cleanup(framebuffer);
83 static int tegra_fb_create_handle(struct drm_framebuffer *framebuffer,
84 struct drm_file *file, unsigned int *handle)
86 struct tegra_fb *fb = to_tegra_fb(framebuffer);
88 return drm_gem_handle_create(file, &fb->planes[0]->gem, handle);
91 static const struct drm_framebuffer_funcs tegra_fb_funcs = {
92 .destroy = tegra_fb_destroy,
93 .create_handle = tegra_fb_create_handle,
96 static struct tegra_fb *tegra_fb_alloc(struct drm_device *drm,
97 const struct drm_mode_fb_cmd2 *mode_cmd,
98 struct tegra_bo **planes,
99 unsigned int num_planes)
105 fb = kzalloc(sizeof(*fb), GFP_KERNEL);
107 return ERR_PTR(-ENOMEM);
109 fb->planes = kzalloc(num_planes * sizeof(*planes), GFP_KERNEL);
112 return ERR_PTR(-ENOMEM);
115 fb->num_planes = num_planes;
117 drm_helper_mode_fill_fb_struct(drm, &fb->base, mode_cmd);
119 for (i = 0; i < fb->num_planes; i++)
120 fb->planes[i] = planes[i];
122 err = drm_framebuffer_init(drm, &fb->base, &tegra_fb_funcs);
124 dev_err(drm->dev, "failed to initialize framebuffer: %d\n",
134 struct drm_framebuffer *tegra_fb_create(struct drm_device *drm,
135 struct drm_file *file,
136 const struct drm_mode_fb_cmd2 *cmd)
138 unsigned int hsub, vsub, i;
139 struct tegra_bo *planes[4];
140 struct drm_gem_object *gem;
144 hsub = drm_format_horz_chroma_subsampling(cmd->pixel_format);
145 vsub = drm_format_vert_chroma_subsampling(cmd->pixel_format);
147 for (i = 0; i < drm_format_num_planes(cmd->pixel_format); i++) {
148 unsigned int width = cmd->width / (i ? hsub : 1);
149 unsigned int height = cmd->height / (i ? vsub : 1);
150 unsigned int size, bpp;
152 gem = drm_gem_object_lookup(file, cmd->handles[i]);
158 bpp = drm_format_plane_cpp(cmd->pixel_format, i);
160 size = (height - 1) * cmd->pitches[i] +
161 width * bpp + cmd->offsets[i];
163 if (gem->size < size) {
168 planes[i] = to_tegra_bo(gem);
171 fb = tegra_fb_alloc(drm, cmd, planes, i);
181 drm_gem_object_unreference_unlocked(&planes[i]->gem);
186 #ifdef CONFIG_DRM_FBDEV_EMULATION
187 static struct fb_ops tegra_fb_ops = {
188 .owner = THIS_MODULE,
189 DRM_FB_HELPER_DEFAULT_OPS,
190 .fb_fillrect = drm_fb_helper_sys_fillrect,
191 .fb_copyarea = drm_fb_helper_sys_copyarea,
192 .fb_imageblit = drm_fb_helper_sys_imageblit,
195 static int tegra_fbdev_probe(struct drm_fb_helper *helper,
196 struct drm_fb_helper_surface_size *sizes)
198 struct tegra_fbdev *fbdev = to_tegra_fbdev(helper);
199 struct tegra_drm *tegra = helper->dev->dev_private;
200 struct drm_device *drm = helper->dev;
201 struct drm_mode_fb_cmd2 cmd = { 0 };
202 unsigned int bytes_per_pixel;
203 struct drm_framebuffer *fb;
204 unsigned long offset;
205 struct fb_info *info;
210 bytes_per_pixel = DIV_ROUND_UP(sizes->surface_bpp, 8);
212 cmd.width = sizes->surface_width;
213 cmd.height = sizes->surface_height;
214 cmd.pitches[0] = round_up(sizes->surface_width * bytes_per_pixel,
216 cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
217 sizes->surface_depth);
219 size = cmd.pitches[0] * cmd.height;
221 bo = tegra_bo_create(drm, size, 0);
225 info = drm_fb_helper_alloc_fbi(helper);
227 dev_err(drm->dev, "failed to allocate framebuffer info\n");
228 drm_gem_object_unreference_unlocked(&bo->gem);
229 return PTR_ERR(info);
232 fbdev->fb = tegra_fb_alloc(drm, &cmd, &bo, 1);
233 if (IS_ERR(fbdev->fb)) {
234 err = PTR_ERR(fbdev->fb);
235 dev_err(drm->dev, "failed to allocate DRM framebuffer: %d\n",
237 drm_gem_object_unreference_unlocked(&bo->gem);
241 fb = &fbdev->fb->base;
243 helper->fbdev = info;
246 info->flags = FBINFO_FLAG_DEFAULT;
247 info->fbops = &tegra_fb_ops;
249 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth);
250 drm_fb_helper_fill_var(info, helper, fb->width, fb->height);
252 offset = info->var.xoffset * bytes_per_pixel +
253 info->var.yoffset * fb->pitches[0];
256 bo->vaddr = vmap(bo->pages, bo->num_pages, VM_MAP,
257 pgprot_writecombine(PAGE_KERNEL));
259 dev_err(drm->dev, "failed to vmap() framebuffer\n");
265 drm->mode_config.fb_base = (resource_size_t)bo->paddr;
266 info->screen_base = (void __iomem *)bo->vaddr + offset;
267 info->screen_size = size;
268 info->fix.smem_start = (unsigned long)(bo->paddr + offset);
269 info->fix.smem_len = size;
274 drm_framebuffer_remove(fb);
276 drm_fb_helper_release_fbi(helper);
280 static const struct drm_fb_helper_funcs tegra_fb_helper_funcs = {
281 .fb_probe = tegra_fbdev_probe,
284 static struct tegra_fbdev *tegra_fbdev_create(struct drm_device *drm)
286 struct tegra_fbdev *fbdev;
288 fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
290 dev_err(drm->dev, "failed to allocate DRM fbdev\n");
291 return ERR_PTR(-ENOMEM);
294 drm_fb_helper_prepare(drm, &fbdev->base, &tegra_fb_helper_funcs);
299 static void tegra_fbdev_free(struct tegra_fbdev *fbdev)
304 static int tegra_fbdev_init(struct tegra_fbdev *fbdev,
305 unsigned int preferred_bpp,
306 unsigned int num_crtc,
307 unsigned int max_connectors)
309 struct drm_device *drm = fbdev->base.dev;
312 err = drm_fb_helper_init(drm, &fbdev->base, num_crtc, max_connectors);
314 dev_err(drm->dev, "failed to initialize DRM FB helper: %d\n",
319 err = drm_fb_helper_single_add_all_connectors(&fbdev->base);
321 dev_err(drm->dev, "failed to add connectors: %d\n", err);
325 err = drm_fb_helper_initial_config(&fbdev->base, preferred_bpp);
327 dev_err(drm->dev, "failed to set initial configuration: %d\n",
335 drm_fb_helper_fini(&fbdev->base);
339 static void tegra_fbdev_exit(struct tegra_fbdev *fbdev)
341 drm_fb_helper_unregister_fbi(&fbdev->base);
342 drm_fb_helper_release_fbi(&fbdev->base);
345 drm_framebuffer_remove(&fbdev->fb->base);
347 drm_fb_helper_fini(&fbdev->base);
348 tegra_fbdev_free(fbdev);
351 void tegra_fbdev_restore_mode(struct tegra_fbdev *fbdev)
354 drm_fb_helper_restore_fbdev_mode_unlocked(&fbdev->base);
357 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 int tegra_drm_fb_prepare(struct drm_device *drm)
368 #ifdef CONFIG_DRM_FBDEV_EMULATION
369 struct tegra_drm *tegra = drm->dev_private;
371 tegra->fbdev = tegra_fbdev_create(drm);
372 if (IS_ERR(tegra->fbdev))
373 return PTR_ERR(tegra->fbdev);
379 void tegra_drm_fb_free(struct drm_device *drm)
381 #ifdef CONFIG_DRM_FBDEV_EMULATION
382 struct tegra_drm *tegra = drm->dev_private;
384 tegra_fbdev_free(tegra->fbdev);
388 int tegra_drm_fb_init(struct drm_device *drm)
390 #ifdef CONFIG_DRM_FBDEV_EMULATION
391 struct tegra_drm *tegra = drm->dev_private;
394 err = tegra_fbdev_init(tegra->fbdev, 32, drm->mode_config.num_crtc,
395 drm->mode_config.num_connector);
403 void tegra_drm_fb_exit(struct drm_device *drm)
405 #ifdef CONFIG_DRM_FBDEV_EMULATION
406 struct tegra_drm *tegra = drm->dev_private;
408 tegra_fbdev_exit(tegra->fbdev);
412 void tegra_drm_fb_suspend(struct drm_device *drm)
414 #ifdef CONFIG_DRM_FBDEV_EMULATION
415 struct tegra_drm *tegra = drm->dev_private;
418 drm_fb_helper_set_suspend(&tegra->fbdev->base, 1);
423 void tegra_drm_fb_resume(struct drm_device *drm)
425 #ifdef CONFIG_DRM_FBDEV_EMULATION
426 struct tegra_drm *tegra = drm->dev_private;
429 drm_fb_helper_set_suspend(&tegra->fbdev->base, 0);