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.
30 #include <drm/drm_crtc.h>
31 #include <drm/drm_fb_helper.h>
32 #include <drm/drm_crtc_helper.h>
34 #include "exynos_drm_drv.h"
35 #include "exynos_drm_fb.h"
36 #include "exynos_drm_gem.h"
38 #define MAX_CONNECTOR 4
39 #define PREFERRED_BPP 32
41 #define to_exynos_fbdev(x) container_of(x, struct exynos_drm_fbdev,\
44 struct exynos_drm_fbdev {
45 struct drm_fb_helper drm_fb_helper;
46 struct exynos_drm_gem_obj *exynos_gem_obj;
49 static struct fb_ops exynos_drm_fb_ops = {
51 .fb_fillrect = cfb_fillrect,
52 .fb_copyarea = cfb_copyarea,
53 .fb_imageblit = cfb_imageblit,
54 .fb_check_var = drm_fb_helper_check_var,
55 .fb_set_par = drm_fb_helper_set_par,
56 .fb_blank = drm_fb_helper_blank,
57 .fb_pan_display = drm_fb_helper_pan_display,
58 .fb_setcmap = drm_fb_helper_setcmap,
61 static int exynos_drm_fbdev_update(struct drm_fb_helper *helper,
62 struct drm_framebuffer *fb)
64 struct fb_info *fbi = helper->fbdev;
65 struct drm_device *dev = helper->dev;
66 struct exynos_drm_gem_buf *buffer;
67 unsigned int size = fb->width * fb->height * (fb->bits_per_pixel >> 3);
70 DRM_DEBUG_KMS("%s\n", __FILE__);
72 drm_fb_helper_fill_fix(fbi, fb->pitches[0], fb->depth);
73 drm_fb_helper_fill_var(fbi, helper, fb->width, fb->height);
75 /* RGB formats use only one buffer */
76 buffer = exynos_drm_fb_buffer(fb, 0);
78 DRM_LOG_KMS("buffer is null.\n");
82 /* buffer count to framebuffer always is 1 at booting time. */
83 exynos_drm_fb_set_buf_cnt(fb, 1);
85 offset = fbi->var.xoffset * (fb->bits_per_pixel >> 3);
86 offset += fbi->var.yoffset * fb->pitches[0];
88 dev->mode_config.fb_base = (resource_size_t)buffer->dma_addr;
89 fbi->screen_base = buffer->kvaddr + offset;
90 fbi->fix.smem_start = (unsigned long)(page_to_phys(buffer->pages[0]) +
92 fbi->screen_size = size;
93 fbi->fix.smem_len = size;
98 static int exynos_drm_fbdev_create(struct drm_fb_helper *helper,
99 struct drm_fb_helper_surface_size *sizes)
101 struct exynos_drm_fbdev *exynos_fbdev = to_exynos_fbdev(helper);
102 struct exynos_drm_gem_obj *exynos_gem_obj;
103 struct drm_device *dev = helper->dev;
105 struct drm_mode_fb_cmd2 mode_cmd = { 0 };
106 struct platform_device *pdev = dev->platformdev;
110 DRM_DEBUG_KMS("%s\n", __FILE__);
112 DRM_DEBUG_KMS("surface width(%d), height(%d) and bpp(%d\n",
113 sizes->surface_width, sizes->surface_height,
116 mode_cmd.width = sizes->surface_width;
117 mode_cmd.height = sizes->surface_height;
118 mode_cmd.pitches[0] = sizes->surface_width * (sizes->surface_bpp >> 3);
119 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
120 sizes->surface_depth);
122 mutex_lock(&dev->struct_mutex);
124 fbi = framebuffer_alloc(0, &pdev->dev);
126 DRM_ERROR("failed to allocate fb info.\n");
131 size = mode_cmd.pitches[0] * mode_cmd.height;
133 /* 0 means to allocate physically continuous memory */
134 exynos_gem_obj = exynos_drm_gem_create(dev, 0, size);
135 if (IS_ERR(exynos_gem_obj)) {
136 ret = PTR_ERR(exynos_gem_obj);
140 exynos_fbdev->exynos_gem_obj = exynos_gem_obj;
142 helper->fb = exynos_drm_framebuffer_init(dev, &mode_cmd,
143 &exynos_gem_obj->base);
144 if (IS_ERR_OR_NULL(helper->fb)) {
145 DRM_ERROR("failed to create drm framebuffer.\n");
146 ret = PTR_ERR(helper->fb);
153 fbi->flags = FBINFO_FLAG_DEFAULT;
154 fbi->fbops = &exynos_drm_fb_ops;
156 ret = fb_alloc_cmap(&fbi->cmap, 256, 0);
158 DRM_ERROR("failed to allocate cmap.\n");
162 ret = exynos_drm_fbdev_update(helper, helper->fb);
164 fb_dealloc_cmap(&fbi->cmap);
169 * if failed, all resources allocated above would be released by
170 * drm_mode_config_cleanup() when drm_load() had been called prior
171 * to any specific driver such as fimd or hdmi driver.
174 mutex_unlock(&dev->struct_mutex);
178 static int exynos_drm_fbdev_probe(struct drm_fb_helper *helper,
179 struct drm_fb_helper_surface_size *sizes)
183 DRM_DEBUG_KMS("%s\n", __FILE__);
186 * with !helper->fb, it means that this funcion is called first time
187 * and after that, the helper->fb would be used as clone mode.
190 ret = exynos_drm_fbdev_create(helper, sizes);
192 DRM_ERROR("failed to create fbdev.\n");
197 * fb_helper expects a value more than 1 if succeed
198 * because register_framebuffer() should be called.
206 static struct drm_fb_helper_funcs exynos_drm_fb_helper_funcs = {
207 .fb_probe = exynos_drm_fbdev_probe,
210 int exynos_drm_fbdev_init(struct drm_device *dev)
212 struct exynos_drm_fbdev *fbdev;
213 struct exynos_drm_private *private = dev->dev_private;
214 struct drm_fb_helper *helper;
215 unsigned int num_crtc;
218 DRM_DEBUG_KMS("%s\n", __FILE__);
220 if (!dev->mode_config.num_crtc || !dev->mode_config.num_connector)
223 fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
225 DRM_ERROR("failed to allocate drm fbdev.\n");
229 private->fb_helper = helper = &fbdev->drm_fb_helper;
230 helper->funcs = &exynos_drm_fb_helper_funcs;
232 num_crtc = dev->mode_config.num_crtc;
234 ret = drm_fb_helper_init(dev, helper, num_crtc, MAX_CONNECTOR);
236 DRM_ERROR("failed to initialize drm fb helper.\n");
240 ret = drm_fb_helper_single_add_all_connectors(helper);
242 DRM_ERROR("failed to register drm_fb_helper_connector.\n");
247 ret = drm_fb_helper_initial_config(helper, PREFERRED_BPP);
249 DRM_ERROR("failed to set up hw configuration.\n");
256 drm_fb_helper_fini(helper);
259 private->fb_helper = NULL;
265 static void exynos_drm_fbdev_destroy(struct drm_device *dev,
266 struct drm_fb_helper *fb_helper)
268 struct drm_framebuffer *fb;
270 /* release drm framebuffer and real buffer */
271 if (fb_helper->fb && fb_helper->fb->funcs) {
274 drm_framebuffer_remove(fb);
277 /* release linux framebuffer */
278 if (fb_helper->fbdev) {
279 struct fb_info *info;
282 info = fb_helper->fbdev;
283 ret = unregister_framebuffer(info);
285 DRM_DEBUG_KMS("failed unregister_framebuffer()\n");
288 fb_dealloc_cmap(&info->cmap);
290 framebuffer_release(info);
293 drm_fb_helper_fini(fb_helper);
296 void exynos_drm_fbdev_fini(struct drm_device *dev)
298 struct exynos_drm_private *private = dev->dev_private;
299 struct exynos_drm_fbdev *fbdev;
301 if (!private || !private->fb_helper)
304 fbdev = to_exynos_fbdev(private->fb_helper);
306 if (fbdev->exynos_gem_obj)
307 exynos_drm_gem_destroy(fbdev->exynos_gem_obj);
309 exynos_drm_fbdev_destroy(dev, private->fb_helper);
311 private->fb_helper = NULL;
314 void exynos_drm_fbdev_restore_mode(struct drm_device *dev)
316 struct exynos_drm_private *private = dev->dev_private;
318 if (!private || !private->fb_helper)
321 drm_fb_helper_restore_fbdev_mode(private->fb_helper);