1 /*
2 * Copyright 2012 Red Hat Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the
6 * "Software"), to deal in the Software without restriction, including
7 * without limitation the rights to use, copy, modify, merge, publish,
8 * distribute, sub license, and/or sell copies of the Software, and to
9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
11 *
12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
13 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
15 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
16 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
17 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
18 * USE OR OTHER DEALINGS IN THE SOFTWARE.
19 *
20 * The above copyright notice and this permission notice (including the
21 * next paragraph) shall be included in all copies or substantial portions
22 * of the Software.
23 *
24 */
25 /*
26 * Authors: Dave Airlie <airlied@redhat.com>
27 */
28 #include <linux/module.h>
29 #include <linux/kernel.h>
30 #include <linux/errno.h>
31 #include <linux/string.h>
32 #include <linux/mm.h>
33 #include <linux/tty.h>
34 #include <linux/sysrq.h>
35 #include <linux/delay.h>
36 #include <linux/fb.h>
37 #include <linux/init.h>
38
39
40 #include <drm/drmP.h>
41 #include <drm/drm_crtc.h>
42 #include <drm/drm_fb_helper.h>
43 #include <drm/drm_crtc_helper.h>
44 #include "ast_drv.h"
45
ast_dirty_update(struct ast_fbdev * afbdev,int x,int y,int width,int height)46 static void ast_dirty_update(struct ast_fbdev *afbdev,
47 int x, int y, int width, int height)
48 {
49 int i;
50 struct drm_gem_object *obj;
51 struct ast_bo *bo;
52 int src_offset, dst_offset;
53 int bpp = (afbdev->afb.base.bits_per_pixel + 7)/8;
54 int ret = -EBUSY;
55 bool unmap = false;
56 bool store_for_later = false;
57 int x2, y2;
58 unsigned long flags;
59
60 obj = afbdev->afb.obj;
61 bo = gem_to_ast_bo(obj);
62
63 /*
64 * try and reserve the BO, if we fail with busy
65 * then the BO is being moved and we should
66 * store up the damage until later.
67 */
68 if (drm_can_sleep())
69 ret = ast_bo_reserve(bo, true);
70 if (ret) {
71 if (ret != -EBUSY)
72 return;
73
74 store_for_later = true;
75 }
76
77 x2 = x + width - 1;
78 y2 = y + height - 1;
79 spin_lock_irqsave(&afbdev->dirty_lock, flags);
80
81 if (afbdev->y1 < y)
82 y = afbdev->y1;
83 if (afbdev->y2 > y2)
84 y2 = afbdev->y2;
85 if (afbdev->x1 < x)
86 x = afbdev->x1;
87 if (afbdev->x2 > x2)
88 x2 = afbdev->x2;
89
90 if (store_for_later) {
91 afbdev->x1 = x;
92 afbdev->x2 = x2;
93 afbdev->y1 = y;
94 afbdev->y2 = y2;
95 spin_unlock_irqrestore(&afbdev->dirty_lock, flags);
96 return;
97 }
98
99 afbdev->x1 = afbdev->y1 = INT_MAX;
100 afbdev->x2 = afbdev->y2 = 0;
101 spin_unlock_irqrestore(&afbdev->dirty_lock, flags);
102
103 if (!bo->kmap.virtual) {
104 ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
105 if (ret) {
106 DRM_ERROR("failed to kmap fb updates\n");
107 ast_bo_unreserve(bo);
108 return;
109 }
110 unmap = true;
111 }
112 for (i = y; i <= y2; i++) {
113 /* assume equal stride for now */
114 src_offset = dst_offset = i * afbdev->afb.base.pitches[0] + (x * bpp);
115 memcpy_toio(bo->kmap.virtual + src_offset, afbdev->sysram + src_offset, (x2 - x + 1) * bpp);
116
117 }
118 if (unmap)
119 ttm_bo_kunmap(&bo->kmap);
120
121 ast_bo_unreserve(bo);
122 }
123
ast_fillrect(struct fb_info * info,const struct fb_fillrect * rect)124 static void ast_fillrect(struct fb_info *info,
125 const struct fb_fillrect *rect)
126 {
127 struct ast_fbdev *afbdev = info->par;
128 drm_fb_helper_sys_fillrect(info, rect);
129 ast_dirty_update(afbdev, rect->dx, rect->dy, rect->width,
130 rect->height);
131 }
132
ast_copyarea(struct fb_info * info,const struct fb_copyarea * area)133 static void ast_copyarea(struct fb_info *info,
134 const struct fb_copyarea *area)
135 {
136 struct ast_fbdev *afbdev = info->par;
137 drm_fb_helper_sys_copyarea(info, area);
138 ast_dirty_update(afbdev, area->dx, area->dy, area->width,
139 area->height);
140 }
141
ast_imageblit(struct fb_info * info,const struct fb_image * image)142 static void ast_imageblit(struct fb_info *info,
143 const struct fb_image *image)
144 {
145 struct ast_fbdev *afbdev = info->par;
146 drm_fb_helper_sys_imageblit(info, image);
147 ast_dirty_update(afbdev, image->dx, image->dy, image->width,
148 image->height);
149 }
150
151 static struct fb_ops astfb_ops = {
152 .owner = THIS_MODULE,
153 .fb_check_var = drm_fb_helper_check_var,
154 .fb_set_par = drm_fb_helper_set_par,
155 .fb_fillrect = ast_fillrect,
156 .fb_copyarea = ast_copyarea,
157 .fb_imageblit = ast_imageblit,
158 .fb_pan_display = drm_fb_helper_pan_display,
159 .fb_blank = drm_fb_helper_blank,
160 .fb_setcmap = drm_fb_helper_setcmap,
161 .fb_debug_enter = drm_fb_helper_debug_enter,
162 .fb_debug_leave = drm_fb_helper_debug_leave,
163 };
164
astfb_create_object(struct ast_fbdev * afbdev,struct drm_mode_fb_cmd2 * mode_cmd,struct drm_gem_object ** gobj_p)165 static int astfb_create_object(struct ast_fbdev *afbdev,
166 struct drm_mode_fb_cmd2 *mode_cmd,
167 struct drm_gem_object **gobj_p)
168 {
169 struct drm_device *dev = afbdev->helper.dev;
170 u32 bpp, depth;
171 u32 size;
172 struct drm_gem_object *gobj;
173
174 int ret = 0;
175 drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
176
177 size = mode_cmd->pitches[0] * mode_cmd->height;
178 ret = ast_gem_create(dev, size, true, &gobj);
179 if (ret)
180 return ret;
181
182 *gobj_p = gobj;
183 return ret;
184 }
185
astfb_create(struct drm_fb_helper * helper,struct drm_fb_helper_surface_size * sizes)186 static int astfb_create(struct drm_fb_helper *helper,
187 struct drm_fb_helper_surface_size *sizes)
188 {
189 struct ast_fbdev *afbdev =
190 container_of(helper, struct ast_fbdev, helper);
191 struct drm_device *dev = afbdev->helper.dev;
192 struct drm_mode_fb_cmd2 mode_cmd;
193 struct drm_framebuffer *fb;
194 struct fb_info *info;
195 int size, ret;
196 void *sysram;
197 struct drm_gem_object *gobj = NULL;
198 struct ast_bo *bo = NULL;
199 mode_cmd.width = sizes->surface_width;
200 mode_cmd.height = sizes->surface_height;
201 mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7)/8);
202
203 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
204 sizes->surface_depth);
205
206 size = mode_cmd.pitches[0] * mode_cmd.height;
207
208 ret = astfb_create_object(afbdev, &mode_cmd, &gobj);
209 if (ret) {
210 DRM_ERROR("failed to create fbcon backing object %d\n", ret);
211 return ret;
212 }
213 bo = gem_to_ast_bo(gobj);
214
215 sysram = vmalloc(size);
216 if (!sysram)
217 return -ENOMEM;
218
219 info = drm_fb_helper_alloc_fbi(helper);
220 if (IS_ERR(info)) {
221 ret = PTR_ERR(info);
222 goto err_free_vram;
223 }
224 info->par = afbdev;
225
226 ret = ast_framebuffer_init(dev, &afbdev->afb, &mode_cmd, gobj);
227 if (ret)
228 goto err_release_fbi;
229
230 afbdev->sysram = sysram;
231 afbdev->size = size;
232
233 fb = &afbdev->afb.base;
234 afbdev->helper.fb = fb;
235
236 strcpy(info->fix.id, "astdrmfb");
237
238 info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
239 info->fbops = &astfb_ops;
240
241 info->apertures->ranges[0].base = pci_resource_start(dev->pdev, 0);
242 info->apertures->ranges[0].size = pci_resource_len(dev->pdev, 0);
243
244 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
245 drm_fb_helper_fill_var(info, &afbdev->helper, sizes->fb_width, sizes->fb_height);
246
247 info->screen_base = sysram;
248 info->screen_size = size;
249
250 info->pixmap.flags = FB_PIXMAP_SYSTEM;
251
252 DRM_DEBUG_KMS("allocated %dx%d\n",
253 fb->width, fb->height);
254
255 return 0;
256
257 err_release_fbi:
258 drm_fb_helper_release_fbi(helper);
259 err_free_vram:
260 vfree(afbdev->sysram);
261 return ret;
262 }
263
ast_fb_gamma_set(struct drm_crtc * crtc,u16 red,u16 green,u16 blue,int regno)264 static void ast_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
265 u16 blue, int regno)
266 {
267 struct ast_crtc *ast_crtc = to_ast_crtc(crtc);
268 ast_crtc->lut_r[regno] = red >> 8;
269 ast_crtc->lut_g[regno] = green >> 8;
270 ast_crtc->lut_b[regno] = blue >> 8;
271 }
272
ast_fb_gamma_get(struct drm_crtc * crtc,u16 * red,u16 * green,u16 * blue,int regno)273 static void ast_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
274 u16 *blue, int regno)
275 {
276 struct ast_crtc *ast_crtc = to_ast_crtc(crtc);
277 *red = ast_crtc->lut_r[regno] << 8;
278 *green = ast_crtc->lut_g[regno] << 8;
279 *blue = ast_crtc->lut_b[regno] << 8;
280 }
281
282 static const struct drm_fb_helper_funcs ast_fb_helper_funcs = {
283 .gamma_set = ast_fb_gamma_set,
284 .gamma_get = ast_fb_gamma_get,
285 .fb_probe = astfb_create,
286 };
287
ast_fbdev_destroy(struct drm_device * dev,struct ast_fbdev * afbdev)288 static void ast_fbdev_destroy(struct drm_device *dev,
289 struct ast_fbdev *afbdev)
290 {
291 struct ast_framebuffer *afb = &afbdev->afb;
292
293 drm_fb_helper_unregister_fbi(&afbdev->helper);
294 drm_fb_helper_release_fbi(&afbdev->helper);
295
296 if (afb->obj) {
297 drm_gem_object_unreference_unlocked(afb->obj);
298 afb->obj = NULL;
299 }
300 drm_fb_helper_fini(&afbdev->helper);
301
302 vfree(afbdev->sysram);
303 drm_framebuffer_unregister_private(&afb->base);
304 drm_framebuffer_cleanup(&afb->base);
305 }
306
ast_fbdev_init(struct drm_device * dev)307 int ast_fbdev_init(struct drm_device *dev)
308 {
309 struct ast_private *ast = dev->dev_private;
310 struct ast_fbdev *afbdev;
311 int ret;
312
313 afbdev = kzalloc(sizeof(struct ast_fbdev), GFP_KERNEL);
314 if (!afbdev)
315 return -ENOMEM;
316
317 ast->fbdev = afbdev;
318 spin_lock_init(&afbdev->dirty_lock);
319
320 drm_fb_helper_prepare(dev, &afbdev->helper, &ast_fb_helper_funcs);
321
322 ret = drm_fb_helper_init(dev, &afbdev->helper,
323 1, 1);
324 if (ret)
325 goto free;
326
327 ret = drm_fb_helper_single_add_all_connectors(&afbdev->helper);
328 if (ret)
329 goto fini;
330
331 /* disable all the possible outputs/crtcs before entering KMS mode */
332 drm_helper_disable_unused_functions(dev);
333
334 ret = drm_fb_helper_initial_config(&afbdev->helper, 32);
335 if (ret)
336 goto fini;
337
338 return 0;
339
340 fini:
341 drm_fb_helper_fini(&afbdev->helper);
342 free:
343 kfree(afbdev);
344 return ret;
345 }
346
ast_fbdev_fini(struct drm_device * dev)347 void ast_fbdev_fini(struct drm_device *dev)
348 {
349 struct ast_private *ast = dev->dev_private;
350
351 if (!ast->fbdev)
352 return;
353
354 ast_fbdev_destroy(dev, ast->fbdev);
355 kfree(ast->fbdev);
356 ast->fbdev = NULL;
357 }
358
ast_fbdev_set_suspend(struct drm_device * dev,int state)359 void ast_fbdev_set_suspend(struct drm_device *dev, int state)
360 {
361 struct ast_private *ast = dev->dev_private;
362
363 if (!ast->fbdev)
364 return;
365
366 drm_fb_helper_set_suspend(&ast->fbdev->helper, state);
367 }
368
ast_fbdev_set_base(struct ast_private * ast,unsigned long gpu_addr)369 void ast_fbdev_set_base(struct ast_private *ast, unsigned long gpu_addr)
370 {
371 ast->fbdev->helper.fbdev->fix.smem_start =
372 ast->fbdev->helper.fbdev->apertures->ranges[0].base + gpu_addr;
373 ast->fbdev->helper.fbdev->fix.smem_len = ast->vram_size - gpu_addr;
374 }
375