3 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
5 * Inki Dae <inki.dae@samsung.com>
6 * Joonyoung Shim <jy0922.shim@samsung.com>
7 * Seung-Woo Kim <sw0312.kim@samsung.com>
9 * Permission is hereby granted, free of charge, to any person obtaining a
10 * copy of this software and associated documentation files (the "Software"),
11 * to deal in the Software without restriction, including without limitation
12 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
13 * and/or sell copies of the Software, and to permit persons to whom the
14 * Software is furnished to do so, subject to the following conditions:
16 * The above copyright notice and this permission notice (including the next
17 * paragraph) shall be included in all copies or substantial portions of the
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
23 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
24 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
25 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
26 * OTHER DEALINGS IN THE SOFTWARE.
31 #include "drm_fb_helper.h"
32 #include "drm_crtc_helper.h"
34 #include "exynos_drm_drv.h"
35 #include "exynos_drm_fb.h"
36 #include "exynos_drm_gem.h"
37 #include "exynos_drm_buf.h"
39 #define MAX_CONNECTOR 4
40 #define PREFERRED_BPP 32
42 #define to_exynos_fbdev(x) container_of(x, struct exynos_drm_fbdev,\
45 struct exynos_drm_fbdev {
46 struct drm_fb_helper drm_fb_helper;
47 struct drm_framebuffer *fb;
50 static int exynos_drm_fbdev_set_par(struct fb_info *info)
52 struct fb_var_screeninfo *var = &info->var;
54 switch (var->bits_per_pixel) {
60 info->fix.visual = FB_VISUAL_TRUECOLOR;
63 info->fix.visual = FB_VISUAL_MONO01;
66 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
70 info->fix.line_length = (var->xres_virtual * var->bits_per_pixel) / 8;
72 return drm_fb_helper_set_par(info);
76 static struct fb_ops exynos_drm_fb_ops = {
78 .fb_fillrect = cfb_fillrect,
79 .fb_copyarea = cfb_copyarea,
80 .fb_imageblit = cfb_imageblit,
81 .fb_check_var = drm_fb_helper_check_var,
82 .fb_set_par = exynos_drm_fbdev_set_par,
83 .fb_blank = drm_fb_helper_blank,
84 .fb_pan_display = drm_fb_helper_pan_display,
85 .fb_setcmap = drm_fb_helper_setcmap,
88 static int exynos_drm_fbdev_update(struct drm_fb_helper *helper,
89 struct drm_framebuffer *fb)
91 struct fb_info *fbi = helper->fbdev;
92 struct drm_device *dev = helper->dev;
93 struct exynos_drm_fbdev *exynos_fb = to_exynos_fbdev(helper);
94 struct exynos_drm_gem_buf *buffer;
95 unsigned int size = fb->width * fb->height * (fb->bits_per_pixel >> 3);
98 DRM_DEBUG_KMS("%s\n", __FILE__);
102 drm_fb_helper_fill_fix(fbi, fb->pitch, fb->depth);
103 drm_fb_helper_fill_var(fbi, helper, fb->width, fb->height);
105 buffer = exynos_drm_fb_get_buf(fb);
107 DRM_LOG_KMS("buffer is null.\n");
111 offset = fbi->var.xoffset * (fb->bits_per_pixel >> 3);
112 offset += fbi->var.yoffset * fb->pitch;
114 dev->mode_config.fb_base = (resource_size_t)buffer->dma_addr;
115 fbi->screen_base = buffer->kvaddr + offset;
116 fbi->fix.smem_start = (unsigned long)(buffer->dma_addr + offset);
117 fbi->screen_size = size;
118 fbi->fix.smem_len = size;
123 static int exynos_drm_fbdev_create(struct drm_fb_helper *helper,
124 struct drm_fb_helper_surface_size *sizes)
126 struct exynos_drm_fbdev *exynos_fbdev = to_exynos_fbdev(helper);
127 struct drm_device *dev = helper->dev;
129 struct drm_mode_fb_cmd mode_cmd = { 0 };
130 struct platform_device *pdev = dev->platformdev;
133 DRM_DEBUG_KMS("%s\n", __FILE__);
135 DRM_DEBUG_KMS("surface width(%d), height(%d) and bpp(%d\n",
136 sizes->surface_width, sizes->surface_height,
139 mode_cmd.width = sizes->surface_width;
140 mode_cmd.height = sizes->surface_height;
141 mode_cmd.bpp = sizes->surface_bpp;
142 mode_cmd.depth = sizes->surface_depth;
144 mutex_lock(&dev->struct_mutex);
146 fbi = framebuffer_alloc(0, &pdev->dev);
148 DRM_ERROR("failed to allocate fb info.\n");
153 exynos_fbdev->fb = exynos_drm_fb_create(dev, NULL, &mode_cmd);
154 if (IS_ERR_OR_NULL(exynos_fbdev->fb)) {
155 DRM_ERROR("failed to create drm framebuffer.\n");
156 ret = PTR_ERR(exynos_fbdev->fb);
160 helper->fb = exynos_fbdev->fb;
164 fbi->flags = FBINFO_FLAG_DEFAULT;
165 fbi->fbops = &exynos_drm_fb_ops;
167 ret = fb_alloc_cmap(&fbi->cmap, 256, 0);
169 DRM_ERROR("failed to allocate cmap.\n");
173 ret = exynos_drm_fbdev_update(helper, helper->fb);
175 fb_dealloc_cmap(&fbi->cmap);
178 * if failed, all resources allocated above would be released by
179 * drm_mode_config_cleanup() when drm_load() had been called prior
180 * to any specific driver such as fimd or hdmi driver.
183 mutex_unlock(&dev->struct_mutex);
188 exynos_drm_fbdev_is_samefb(struct drm_framebuffer *fb,
189 struct drm_fb_helper_surface_size *sizes)
191 if (fb->width != sizes->surface_width)
193 if (fb->height != sizes->surface_height)
195 if (fb->bits_per_pixel != sizes->surface_bpp)
197 if (fb->depth != sizes->surface_depth)
203 static int exynos_drm_fbdev_recreate(struct drm_fb_helper *helper,
204 struct drm_fb_helper_surface_size *sizes)
206 struct drm_device *dev = helper->dev;
207 struct exynos_drm_fbdev *exynos_fbdev = to_exynos_fbdev(helper);
208 struct drm_framebuffer *fb = exynos_fbdev->fb;
209 struct drm_mode_fb_cmd mode_cmd = { 0 };
211 DRM_DEBUG_KMS("%s\n", __FILE__);
213 if (helper->fb != fb) {
214 DRM_ERROR("drm framebuffer is different\n");
218 if (exynos_drm_fbdev_is_samefb(fb, sizes))
221 mode_cmd.width = sizes->surface_width;
222 mode_cmd.height = sizes->surface_height;
223 mode_cmd.bpp = sizes->surface_bpp;
224 mode_cmd.depth = sizes->surface_depth;
226 if (fb->funcs->destroy)
227 fb->funcs->destroy(fb);
229 exynos_fbdev->fb = exynos_drm_fb_create(dev, NULL, &mode_cmd);
230 if (IS_ERR(exynos_fbdev->fb)) {
231 DRM_ERROR("failed to allocate fb.\n");
232 return PTR_ERR(exynos_fbdev->fb);
235 helper->fb = exynos_fbdev->fb;
236 return exynos_drm_fbdev_update(helper, helper->fb);
239 static int exynos_drm_fbdev_probe(struct drm_fb_helper *helper,
240 struct drm_fb_helper_surface_size *sizes)
244 DRM_DEBUG_KMS("%s\n", __FILE__);
247 ret = exynos_drm_fbdev_create(helper, sizes);
249 DRM_ERROR("failed to create fbdev.\n");
254 * fb_helper expects a value more than 1 if succeed
255 * because register_framebuffer() should be called.
259 ret = exynos_drm_fbdev_recreate(helper, sizes);
261 DRM_ERROR("failed to reconfigure fbdev\n");
269 static struct drm_fb_helper_funcs exynos_drm_fb_helper_funcs = {
270 .fb_probe = exynos_drm_fbdev_probe,
273 int exynos_drm_fbdev_init(struct drm_device *dev)
275 struct exynos_drm_fbdev *fbdev;
276 struct exynos_drm_private *private = dev->dev_private;
277 struct drm_fb_helper *helper;
278 unsigned int num_crtc;
281 DRM_DEBUG_KMS("%s\n", __FILE__);
283 if (!dev->mode_config.num_crtc || !dev->mode_config.num_connector)
286 fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
288 DRM_ERROR("failed to allocate drm fbdev.\n");
292 private->fb_helper = helper = &fbdev->drm_fb_helper;
293 helper->funcs = &exynos_drm_fb_helper_funcs;
295 num_crtc = dev->mode_config.num_crtc;
297 ret = drm_fb_helper_init(dev, helper, num_crtc, MAX_CONNECTOR);
299 DRM_ERROR("failed to initialize drm fb helper.\n");
303 ret = drm_fb_helper_single_add_all_connectors(helper);
305 DRM_ERROR("failed to register drm_fb_helper_connector.\n");
310 ret = drm_fb_helper_initial_config(helper, PREFERRED_BPP);
312 DRM_ERROR("failed to set up hw configuration.\n");
319 drm_fb_helper_fini(helper);
322 private->fb_helper = NULL;
328 static void exynos_drm_fbdev_destroy(struct drm_device *dev,
329 struct drm_fb_helper *fb_helper)
331 struct drm_framebuffer *fb;
333 /* release drm framebuffer and real buffer */
334 if (fb_helper->fb && fb_helper->fb->funcs) {
336 if (fb && fb->funcs->destroy)
337 fb->funcs->destroy(fb);
340 /* release linux framebuffer */
341 if (fb_helper->fbdev) {
342 struct fb_info *info;
345 info = fb_helper->fbdev;
346 ret = unregister_framebuffer(info);
348 DRM_DEBUG_KMS("failed unregister_framebuffer()\n");
351 fb_dealloc_cmap(&info->cmap);
353 framebuffer_release(info);
356 drm_fb_helper_fini(fb_helper);
359 void exynos_drm_fbdev_fini(struct drm_device *dev)
361 struct exynos_drm_private *private = dev->dev_private;
362 struct exynos_drm_fbdev *fbdev;
364 if (!private || !private->fb_helper)
367 fbdev = to_exynos_fbdev(private->fb_helper);
369 exynos_drm_fbdev_destroy(dev, private->fb_helper);
371 private->fb_helper = NULL;
374 void exynos_drm_fbdev_restore_mode(struct drm_device *dev)
376 struct exynos_drm_private *private = dev->dev_private;
378 if (!private || !private->fb_helper)
381 drm_fb_helper_restore_fbdev_mode(private->fb_helper);
384 int exynos_drm_fbdev_reinit(struct drm_device *dev)
386 struct exynos_drm_private *private = dev->dev_private;
387 struct drm_fb_helper *fb_helper;
394 * if all sub drivers were unloaded then num_connector is 0
395 * so at this time, the framebuffers also should be destroyed.
397 if (!dev->mode_config.num_connector) {
398 exynos_drm_fbdev_fini(dev);
402 fb_helper = private->fb_helper;
405 struct list_head temp_list;
407 INIT_LIST_HEAD(&temp_list);
410 * fb_helper is reintialized but kernel fb is reused
411 * so kernel_fb_list need to be backuped and restored
413 if (!list_empty(&fb_helper->kernel_fb_list))
414 list_replace_init(&fb_helper->kernel_fb_list,
417 drm_fb_helper_fini(fb_helper);
419 ret = drm_fb_helper_init(dev, fb_helper,
420 dev->mode_config.num_crtc, MAX_CONNECTOR);
422 DRM_ERROR("failed to initialize drm fb helper\n");
426 if (!list_empty(&temp_list))
427 list_replace(&temp_list, &fb_helper->kernel_fb_list);
429 ret = drm_fb_helper_single_add_all_connectors(fb_helper);
431 DRM_ERROR("failed to add fb helper to connectors\n");
435 ret = drm_fb_helper_initial_config(fb_helper, PREFERRED_BPP);
437 DRM_ERROR("failed to set up hw configuration.\n");
442 * if drm_load() failed whem drm load() was called prior
443 * to specific drivers, fb_helper must be NULL and so
444 * this fuction should be called again to re-initialize and
445 * re-configure the fb helper. it means that this function
446 * has been called by the specific drivers.
448 ret = exynos_drm_fbdev_init(dev);
455 * if drm_load() failed when drm load() was called prior
456 * to specific drivers, the fb_helper must be NULL and so check it.
459 drm_fb_helper_fini(fb_helper);
464 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
465 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
466 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
467 MODULE_DESCRIPTION("Samsung SoC DRM FBDEV Driver");
468 MODULE_LICENSE("GPL");