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Commit | Line | Data |
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1c248b7d ID |
1 | /* exynos_drm_fbdev.c |
2 | * | |
3 | * Copyright (c) 2011 Samsung Electronics Co., Ltd. | |
4 | * Authors: | |
5 | * Inki Dae <inki.dae@samsung.com> | |
6 | * Joonyoung Shim <jy0922.shim@samsung.com> | |
7 | * Seung-Woo Kim <sw0312.kim@samsung.com> | |
8 | * | |
d81aecb5 ID |
9 | * This program is free software; you can redistribute it and/or modify it |
10 | * under the terms of the GNU General Public License as published by the | |
11 | * Free Software Foundation; either version 2 of the License, or (at your | |
12 | * option) any later version. | |
1c248b7d ID |
13 | */ |
14 | ||
760285e7 DH |
15 | #include <drm/drmP.h> |
16 | #include <drm/drm_crtc.h> | |
17 | #include <drm/drm_fb_helper.h> | |
18 | #include <drm/drm_crtc_helper.h> | |
a1bfacf4 | 19 | #include <drm/exynos_drm.h> |
1c248b7d | 20 | |
6e8edf8a MS |
21 | #include <linux/console.h> |
22 | ||
1c248b7d ID |
23 | #include "exynos_drm_drv.h" |
24 | #include "exynos_drm_fb.h" | |
e30655d0 | 25 | #include "exynos_drm_fbdev.h" |
c704f1b4 | 26 | #include "exynos_drm_iommu.h" |
1c248b7d ID |
27 | |
28 | #define MAX_CONNECTOR 4 | |
29 | #define PREFERRED_BPP 32 | |
30 | ||
31 | #define to_exynos_fbdev(x) container_of(x, struct exynos_drm_fbdev,\ | |
32 | drm_fb_helper) | |
33 | ||
34 | struct exynos_drm_fbdev { | |
813fd67b JS |
35 | struct drm_fb_helper drm_fb_helper; |
36 | struct exynos_drm_gem *exynos_gem; | |
1c248b7d ID |
37 | }; |
38 | ||
dd265850 P |
39 | static int exynos_drm_fb_mmap(struct fb_info *info, |
40 | struct vm_area_struct *vma) | |
41 | { | |
42 | struct drm_fb_helper *helper = info->par; | |
43 | struct exynos_drm_fbdev *exynos_fbd = to_exynos_fbdev(helper); | |
813fd67b | 44 | struct exynos_drm_gem *exynos_gem = exynos_fbd->exynos_gem; |
dd265850 P |
45 | unsigned long vm_size; |
46 | int ret; | |
47 | ||
dd265850 P |
48 | vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP; |
49 | ||
50 | vm_size = vma->vm_end - vma->vm_start; | |
51 | ||
813fd67b | 52 | if (vm_size > exynos_gem->size) |
dd265850 P |
53 | return -EINVAL; |
54 | ||
f43c3596 | 55 | ret = dma_mmap_attrs(to_dma_dev(helper->dev), vma, exynos_gem->cookie, |
813fd67b | 56 | exynos_gem->dma_addr, exynos_gem->size, |
00085f1e | 57 | exynos_gem->dma_attrs); |
dd265850 P |
58 | if (ret < 0) { |
59 | DRM_ERROR("failed to mmap.\n"); | |
60 | return ret; | |
61 | } | |
62 | ||
63 | return 0; | |
64 | } | |
65 | ||
1c248b7d ID |
66 | static struct fb_ops exynos_drm_fb_ops = { |
67 | .owner = THIS_MODULE, | |
2eec838c | 68 | DRM_FB_HELPER_DEFAULT_OPS, |
dd265850 | 69 | .fb_mmap = exynos_drm_fb_mmap, |
7c7d4507 AT |
70 | .fb_fillrect = drm_fb_helper_cfb_fillrect, |
71 | .fb_copyarea = drm_fb_helper_cfb_copyarea, | |
72 | .fb_imageblit = drm_fb_helper_cfb_imageblit, | |
1c248b7d ID |
73 | }; |
74 | ||
19c8b834 | 75 | static int exynos_drm_fbdev_update(struct drm_fb_helper *helper, |
d7619960 | 76 | struct drm_fb_helper_surface_size *sizes, |
813fd67b | 77 | struct exynos_drm_gem *exynos_gem) |
1c248b7d | 78 | { |
ee885ca5 | 79 | struct fb_info *fbi; |
d7619960 | 80 | struct drm_framebuffer *fb = helper->fb; |
272725c7 | 81 | unsigned int size = fb->width * fb->height * fb->format->cpp[0]; |
a5d7ac30 | 82 | unsigned int nr_pages; |
19c8b834 | 83 | unsigned long offset; |
1c248b7d | 84 | |
ee885ca5 JS |
85 | fbi = drm_fb_helper_alloc_fbi(helper); |
86 | if (IS_ERR(fbi)) { | |
87 | DRM_ERROR("failed to allocate fb info.\n"); | |
88 | return PTR_ERR(fbi); | |
89 | } | |
90 | ||
91 | fbi->par = helper; | |
92 | fbi->flags = FBINFO_FLAG_DEFAULT; | |
93 | fbi->fbops = &exynos_drm_fb_ops; | |
94 | ||
b00c600e | 95 | drm_fb_helper_fill_fix(fbi, fb->pitches[0], fb->format->depth); |
ecbf1d5a | 96 | drm_fb_helper_fill_var(fbi, helper, sizes->fb_width, sizes->fb_height); |
1c248b7d | 97 | |
813fd67b | 98 | nr_pages = exynos_gem->size >> PAGE_SHIFT; |
a5d7ac30 | 99 | |
813fd67b JS |
100 | exynos_gem->kvaddr = (void __iomem *) vmap(exynos_gem->pages, nr_pages, |
101 | VM_MAP, pgprot_writecombine(PAGE_KERNEL)); | |
102 | if (!exynos_gem->kvaddr) { | |
a5d7ac30 CC |
103 | DRM_ERROR("failed to map pages to kernel space.\n"); |
104 | return -EIO; | |
4744ad24 ID |
105 | } |
106 | ||
272725c7 | 107 | offset = fbi->var.xoffset * fb->format->cpp[0]; |
01f2c773 | 108 | offset += fbi->var.yoffset * fb->pitches[0]; |
1c248b7d | 109 | |
813fd67b | 110 | fbi->screen_base = exynos_gem->kvaddr + offset; |
1c248b7d | 111 | fbi->screen_size = size; |
71b1f195 | 112 | fbi->fix.smem_len = size; |
19c8b834 ID |
113 | |
114 | return 0; | |
1c248b7d ID |
115 | } |
116 | ||
117 | static int exynos_drm_fbdev_create(struct drm_fb_helper *helper, | |
118 | struct drm_fb_helper_surface_size *sizes) | |
119 | { | |
120 | struct exynos_drm_fbdev *exynos_fbdev = to_exynos_fbdev(helper); | |
813fd67b | 121 | struct exynos_drm_gem *exynos_gem; |
1c248b7d | 122 | struct drm_device *dev = helper->dev; |
a794d57d | 123 | struct drm_mode_fb_cmd2 mode_cmd = { 0 }; |
e1533c08 | 124 | unsigned long size; |
1c248b7d ID |
125 | int ret; |
126 | ||
1c248b7d ID |
127 | DRM_DEBUG_KMS("surface width(%d), height(%d) and bpp(%d\n", |
128 | sizes->surface_width, sizes->surface_height, | |
129 | sizes->surface_bpp); | |
130 | ||
131 | mode_cmd.width = sizes->surface_width; | |
132 | mode_cmd.height = sizes->surface_height; | |
a794d57d JS |
133 | mode_cmd.pitches[0] = sizes->surface_width * (sizes->surface_bpp >> 3); |
134 | mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, | |
135 | sizes->surface_depth); | |
1c248b7d | 136 | |
e1533c08 | 137 | size = mode_cmd.pitches[0] * mode_cmd.height; |
2b35892e | 138 | |
813fd67b | 139 | exynos_gem = exynos_drm_gem_create(dev, EXYNOS_BO_CONTIG, size); |
a1bfacf4 VS |
140 | /* |
141 | * If physically contiguous memory allocation fails and if IOMMU is | |
142 | * supported then try to get buffer from non physically contiguous | |
143 | * memory area. | |
144 | */ | |
813fd67b | 145 | if (IS_ERR(exynos_gem) && is_drm_iommu_supported(dev)) { |
896bbc3e | 146 | dev_warn(dev->dev, "contiguous FB allocation failed, falling back to non-contiguous\n"); |
813fd67b JS |
147 | exynos_gem = exynos_drm_gem_create(dev, EXYNOS_BO_NONCONTIG, |
148 | size); | |
a1bfacf4 VS |
149 | } |
150 | ||
2f424200 DV |
151 | if (IS_ERR(exynos_gem)) |
152 | return PTR_ERR(exynos_gem); | |
e1533c08 | 153 | |
813fd67b | 154 | exynos_fbdev->exynos_gem = exynos_gem; |
e1533c08 | 155 | |
813fd67b JS |
156 | helper->fb = |
157 | exynos_drm_framebuffer_init(dev, &mode_cmd, &exynos_gem, 1); | |
41eab402 | 158 | if (IS_ERR(helper->fb)) { |
1c248b7d | 159 | DRM_ERROR("failed to create drm framebuffer.\n"); |
e1533c08 | 160 | ret = PTR_ERR(helper->fb); |
662aa6d7 | 161 | goto err_destroy_gem; |
1c248b7d ID |
162 | } |
163 | ||
813fd67b | 164 | ret = exynos_drm_fbdev_update(helper, sizes, exynos_gem); |
662aa6d7 | 165 | if (ret < 0) |
7c7d4507 | 166 | goto err_destroy_framebuffer; |
662aa6d7 | 167 | |
662aa6d7 ID |
168 | return ret; |
169 | ||
662aa6d7 ID |
170 | err_destroy_framebuffer: |
171 | drm_framebuffer_cleanup(helper->fb); | |
172 | err_destroy_gem: | |
813fd67b | 173 | exynos_drm_gem_destroy(exynos_gem); |
1c248b7d | 174 | |
2f424200 DV |
175 | /* |
176 | * if failed, all resources allocated above would be released by | |
177 | * drm_mode_config_cleanup() when drm_load() had been called prior | |
178 | * to any specific driver such as fimd or hdmi driver. | |
179 | */ | |
180 | ||
1c248b7d ID |
181 | return ret; |
182 | } | |
183 | ||
3a493879 | 184 | static const struct drm_fb_helper_funcs exynos_drm_fb_helper_funcs = { |
cd5428a5 | 185 | .fb_probe = exynos_drm_fbdev_create, |
1c248b7d ID |
186 | }; |
187 | ||
188 | int exynos_drm_fbdev_init(struct drm_device *dev) | |
189 | { | |
190 | struct exynos_drm_fbdev *fbdev; | |
191 | struct exynos_drm_private *private = dev->dev_private; | |
192 | struct drm_fb_helper *helper; | |
1c248b7d ID |
193 | int ret; |
194 | ||
1c248b7d ID |
195 | if (!dev->mode_config.num_crtc || !dev->mode_config.num_connector) |
196 | return 0; | |
197 | ||
198 | fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL); | |
38bb5253 | 199 | if (!fbdev) |
1c248b7d | 200 | return -ENOMEM; |
1c248b7d ID |
201 | |
202 | private->fb_helper = helper = &fbdev->drm_fb_helper; | |
10a23102 TR |
203 | |
204 | drm_fb_helper_prepare(dev, helper, &exynos_drm_fb_helper_funcs); | |
1c248b7d | 205 | |
e4563f6b | 206 | ret = drm_fb_helper_init(dev, helper, MAX_CONNECTOR); |
1c248b7d ID |
207 | if (ret < 0) { |
208 | DRM_ERROR("failed to initialize drm fb helper.\n"); | |
209 | goto err_init; | |
210 | } | |
211 | ||
212 | ret = drm_fb_helper_single_add_all_connectors(helper); | |
213 | if (ret < 0) { | |
214 | DRM_ERROR("failed to register drm_fb_helper_connector.\n"); | |
215 | goto err_setup; | |
216 | ||
217 | } | |
218 | ||
219 | ret = drm_fb_helper_initial_config(helper, PREFERRED_BPP); | |
220 | if (ret < 0) { | |
221 | DRM_ERROR("failed to set up hw configuration.\n"); | |
222 | goto err_setup; | |
223 | } | |
224 | ||
225 | return 0; | |
226 | ||
227 | err_setup: | |
228 | drm_fb_helper_fini(helper); | |
229 | ||
230 | err_init: | |
231 | private->fb_helper = NULL; | |
232 | kfree(fbdev); | |
233 | ||
234 | return ret; | |
235 | } | |
236 | ||
237 | static void exynos_drm_fbdev_destroy(struct drm_device *dev, | |
238 | struct drm_fb_helper *fb_helper) | |
239 | { | |
4744ad24 | 240 | struct exynos_drm_fbdev *exynos_fbd = to_exynos_fbdev(fb_helper); |
813fd67b | 241 | struct exynos_drm_gem *exynos_gem = exynos_fbd->exynos_gem; |
1c248b7d ID |
242 | struct drm_framebuffer *fb; |
243 | ||
e8d3ef02 | 244 | vunmap(exynos_gem->kvaddr); |
4744ad24 | 245 | |
1c248b7d ID |
246 | /* release drm framebuffer and real buffer */ |
247 | if (fb_helper->fb && fb_helper->fb->funcs) { | |
248 | fb = fb_helper->fb; | |
328c057c | 249 | if (fb) |
f7eff60e | 250 | drm_framebuffer_remove(fb); |
1c248b7d ID |
251 | } |
252 | ||
7c7d4507 | 253 | drm_fb_helper_unregister_fbi(fb_helper); |
1c248b7d ID |
254 | |
255 | drm_fb_helper_fini(fb_helper); | |
256 | } | |
257 | ||
258 | void exynos_drm_fbdev_fini(struct drm_device *dev) | |
259 | { | |
260 | struct exynos_drm_private *private = dev->dev_private; | |
261 | struct exynos_drm_fbdev *fbdev; | |
262 | ||
263 | if (!private || !private->fb_helper) | |
264 | return; | |
265 | ||
266 | fbdev = to_exynos_fbdev(private->fb_helper); | |
267 | ||
268 | exynos_drm_fbdev_destroy(dev, private->fb_helper); | |
269 | kfree(fbdev); | |
270 | private->fb_helper = NULL; | |
271 | } | |
272 | ||
273 | void exynos_drm_fbdev_restore_mode(struct drm_device *dev) | |
274 | { | |
275 | struct exynos_drm_private *private = dev->dev_private; | |
276 | ||
277 | if (!private || !private->fb_helper) | |
278 | return; | |
279 | ||
5ea1f752 | 280 | drm_fb_helper_restore_fbdev_mode_unlocked(private->fb_helper); |
1c248b7d | 281 | } |
25c6a853 AH |
282 | |
283 | void exynos_drm_output_poll_changed(struct drm_device *dev) | |
284 | { | |
285 | struct exynos_drm_private *private = dev->dev_private; | |
286 | struct drm_fb_helper *fb_helper = private->fb_helper; | |
287 | ||
812fc6f2 | 288 | drm_fb_helper_hotplug_event(fb_helper); |
25c6a853 | 289 | } |
6e8edf8a MS |
290 | |
291 | void exynos_drm_fbdev_suspend(struct drm_device *dev) | |
292 | { | |
293 | struct exynos_drm_private *private = dev->dev_private; | |
294 | ||
295 | console_lock(); | |
296 | drm_fb_helper_set_suspend(private->fb_helper, 1); | |
297 | console_unlock(); | |
298 | } | |
299 | ||
300 | void exynos_drm_fbdev_resume(struct drm_device *dev) | |
301 | { | |
302 | struct exynos_drm_private *private = dev->dev_private; | |
303 | ||
304 | console_lock(); | |
305 | drm_fb_helper_set_suspend(private->fb_helper, 0); | |
306 | console_unlock(); | |
307 | } |