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/module.h>
18 static inline struct tegra_fb *to_tegra_fb(struct drm_framebuffer *fb)
20 return container_of(fb, struct tegra_fb, base);
23 static inline struct tegra_fbdev *to_tegra_fbdev(struct drm_fb_helper *helper)
25 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 static void tegra_fb_destroy(struct drm_framebuffer *framebuffer)
41 struct tegra_fb *fb = to_tegra_fb(framebuffer);
44 for (i = 0; i < fb->num_planes; i++) {
45 struct tegra_bo *bo = fb->planes[i];
48 drm_gem_object_unreference_unlocked(&bo->gem);
51 drm_framebuffer_cleanup(framebuffer);
56 static int tegra_fb_create_handle(struct drm_framebuffer *framebuffer,
57 struct drm_file *file, unsigned int *handle)
59 struct tegra_fb *fb = to_tegra_fb(framebuffer);
61 return drm_gem_handle_create(file, &fb->planes[0]->gem, handle);
64 static struct drm_framebuffer_funcs tegra_fb_funcs = {
65 .destroy = tegra_fb_destroy,
66 .create_handle = tegra_fb_create_handle,
69 static struct tegra_fb *tegra_fb_alloc(struct drm_device *drm,
70 struct drm_mode_fb_cmd2 *mode_cmd,
71 struct tegra_bo **planes,
72 unsigned int num_planes)
78 fb = kzalloc(sizeof(*fb), GFP_KERNEL);
80 return ERR_PTR(-ENOMEM);
82 fb->planes = kzalloc(num_planes * sizeof(*planes), GFP_KERNEL);
84 return ERR_PTR(-ENOMEM);
86 fb->num_planes = num_planes;
88 drm_helper_mode_fill_fb_struct(&fb->base, mode_cmd);
90 for (i = 0; i < fb->num_planes; i++)
91 fb->planes[i] = planes[i];
93 err = drm_framebuffer_init(drm, &fb->base, &tegra_fb_funcs);
95 dev_err(drm->dev, "failed to initialize framebuffer: %d\n",
105 static struct drm_framebuffer *tegra_fb_create(struct drm_device *drm,
106 struct drm_file *file,
107 struct drm_mode_fb_cmd2 *cmd)
109 unsigned int hsub, vsub, i;
110 struct tegra_bo *planes[4];
111 struct drm_gem_object *gem;
115 hsub = drm_format_horz_chroma_subsampling(cmd->pixel_format);
116 vsub = drm_format_vert_chroma_subsampling(cmd->pixel_format);
118 for (i = 0; i < drm_format_num_planes(cmd->pixel_format); i++) {
119 unsigned int width = cmd->width / (i ? hsub : 1);
120 unsigned int height = cmd->height / (i ? vsub : 1);
121 unsigned int size, bpp;
123 gem = drm_gem_object_lookup(drm, file, cmd->handles[i]);
129 bpp = drm_format_plane_cpp(cmd->pixel_format, i);
131 size = (height - 1) * cmd->pitches[i] +
132 width * bpp + cmd->offsets[i];
134 if (gem->size < size) {
139 planes[i] = to_tegra_bo(gem);
142 fb = tegra_fb_alloc(drm, cmd, planes, i);
152 drm_gem_object_unreference_unlocked(&planes[i]->gem);
157 static struct fb_ops tegra_fb_ops = {
158 .owner = THIS_MODULE,
159 .fb_fillrect = sys_fillrect,
160 .fb_copyarea = sys_copyarea,
161 .fb_imageblit = sys_imageblit,
162 .fb_check_var = drm_fb_helper_check_var,
163 .fb_set_par = drm_fb_helper_set_par,
164 .fb_blank = drm_fb_helper_blank,
165 .fb_pan_display = drm_fb_helper_pan_display,
166 .fb_setcmap = drm_fb_helper_setcmap,
169 static int tegra_fbdev_probe(struct drm_fb_helper *helper,
170 struct drm_fb_helper_surface_size *sizes)
172 struct tegra_fbdev *fbdev = to_tegra_fbdev(helper);
173 struct drm_device *drm = helper->dev;
174 struct drm_mode_fb_cmd2 cmd = { 0 };
175 unsigned int bytes_per_pixel;
176 struct drm_framebuffer *fb;
177 unsigned long offset;
178 struct fb_info *info;
183 bytes_per_pixel = DIV_ROUND_UP(sizes->surface_bpp, 8);
185 cmd.width = sizes->surface_width;
186 cmd.height = sizes->surface_height;
187 cmd.pitches[0] = sizes->surface_width * bytes_per_pixel;
188 cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
189 sizes->surface_depth);
191 size = cmd.pitches[0] * cmd.height;
193 bo = tegra_bo_create(drm, size);
197 info = framebuffer_alloc(0, drm->dev);
199 dev_err(drm->dev, "failed to allocate framebuffer info\n");
200 tegra_bo_free_object(&bo->gem);
204 fbdev->fb = tegra_fb_alloc(drm, &cmd, &bo, 1);
205 if (IS_ERR(fbdev->fb)) {
206 dev_err(drm->dev, "failed to allocate DRM framebuffer\n");
207 err = PTR_ERR(fbdev->fb);
211 fb = &fbdev->fb->base;
213 helper->fbdev = info;
216 info->flags = FBINFO_FLAG_DEFAULT;
217 info->fbops = &tegra_fb_ops;
219 err = fb_alloc_cmap(&info->cmap, 256, 0);
221 dev_err(drm->dev, "failed to allocate color map: %d\n", err);
225 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
226 drm_fb_helper_fill_var(info, helper, fb->width, fb->height);
228 offset = info->var.xoffset * bytes_per_pixel +
229 info->var.yoffset * fb->pitches[0];
231 drm->mode_config.fb_base = (resource_size_t)bo->paddr;
232 info->screen_base = bo->vaddr + offset;
233 info->screen_size = size;
234 info->fix.smem_start = (unsigned long)(bo->paddr + offset);
235 info->fix.smem_len = size;
240 drm_framebuffer_unregister_private(fb);
241 tegra_fb_destroy(fb);
243 framebuffer_release(info);
247 static struct drm_fb_helper_funcs tegra_fb_helper_funcs = {
248 .fb_probe = tegra_fbdev_probe,
251 static struct tegra_fbdev *tegra_fbdev_create(struct drm_device *drm,
252 unsigned int preferred_bpp,
253 unsigned int num_crtc,
254 unsigned int max_connectors)
256 struct drm_fb_helper *helper;
257 struct tegra_fbdev *fbdev;
260 fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
262 dev_err(drm->dev, "failed to allocate DRM fbdev\n");
263 return ERR_PTR(-ENOMEM);
266 fbdev->base.funcs = &tegra_fb_helper_funcs;
267 helper = &fbdev->base;
269 err = drm_fb_helper_init(drm, &fbdev->base, num_crtc, max_connectors);
271 dev_err(drm->dev, "failed to initialize DRM FB helper\n");
275 err = drm_fb_helper_single_add_all_connectors(&fbdev->base);
277 dev_err(drm->dev, "failed to add connectors\n");
281 drm_helper_disable_unused_functions(drm);
283 err = drm_fb_helper_initial_config(&fbdev->base, preferred_bpp);
285 dev_err(drm->dev, "failed to set initial configuration\n");
292 drm_fb_helper_fini(&fbdev->base);
298 static void tegra_fbdev_free(struct tegra_fbdev *fbdev)
300 struct fb_info *info = fbdev->base.fbdev;
305 err = unregister_framebuffer(info);
307 DRM_DEBUG_KMS("failed to unregister framebuffer\n");
310 fb_dealloc_cmap(&info->cmap);
312 framebuffer_release(info);
316 drm_framebuffer_unregister_private(&fbdev->fb->base);
317 tegra_fb_destroy(&fbdev->fb->base);
320 drm_fb_helper_fini(&fbdev->base);
324 static void tegra_fb_output_poll_changed(struct drm_device *drm)
326 struct host1x_drm *host1x = drm->dev_private;
329 drm_fb_helper_hotplug_event(&host1x->fbdev->base);
332 static const struct drm_mode_config_funcs tegra_drm_mode_funcs = {
333 .fb_create = tegra_fb_create,
334 .output_poll_changed = tegra_fb_output_poll_changed,
337 int tegra_drm_fb_init(struct drm_device *drm)
339 struct host1x_drm *host1x = drm->dev_private;
340 struct tegra_fbdev *fbdev;
342 drm->mode_config.min_width = 0;
343 drm->mode_config.min_height = 0;
345 drm->mode_config.max_width = 4096;
346 drm->mode_config.max_height = 4096;
348 drm->mode_config.funcs = &tegra_drm_mode_funcs;
350 fbdev = tegra_fbdev_create(drm, 32, drm->mode_config.num_crtc,
351 drm->mode_config.num_connector);
353 return PTR_ERR(fbdev);
355 host1x->fbdev = fbdev;
360 void tegra_drm_fb_exit(struct drm_device *drm)
362 struct host1x_drm *host1x = drm->dev_private;
364 tegra_fbdev_free(host1x->fbdev);
367 void tegra_fbdev_restore_mode(struct tegra_fbdev *fbdev)
370 drm_modeset_lock_all(fbdev->base.dev);
371 drm_fb_helper_restore_fbdev_mode(&fbdev->base);
372 drm_modeset_unlock_all(fbdev->base.dev);