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;
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 ret = ast_bo_reserve(bo, true);
69 if (ret) {
70 if (ret != -EBUSY)
71 return;
72
73 store_for_later = true;
74 }
75
76 x2 = x + width - 1;
77 y2 = y + height - 1;
78 spin_lock_irqsave(&afbdev->dirty_lock, flags);
79
80 if (afbdev->y1 < y)
81 y = afbdev->y1;
82 if (afbdev->y2 > y2)
83 y2 = afbdev->y2;
84 if (afbdev->x1 < x)
85 x = afbdev->x1;
86 if (afbdev->x2 > x2)
87 x2 = afbdev->x2;
88
89 if (store_for_later) {
90 afbdev->x1 = x;
91 afbdev->x2 = x2;
92 afbdev->y1 = y;
93 afbdev->y2 = y2;
94 spin_unlock_irqrestore(&afbdev->dirty_lock, flags);
95 return;
96 }
97
98 afbdev->x1 = afbdev->y1 = INT_MAX;
99 afbdev->x2 = afbdev->y2 = 0;
100 spin_unlock_irqrestore(&afbdev->dirty_lock, flags);
101
102 if (!bo->kmap.virtual) {
103 ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
104 if (ret) {
105 DRM_ERROR("failed to kmap fb updates\n");
106 ast_bo_unreserve(bo);
107 return;
108 }
109 unmap = true;
110 }
111 for (i = y; i <= y2; i++) {
112 /* assume equal stride for now */
113 src_offset = dst_offset = i * afbdev->afb.base.pitches[0] + (x * bpp);
114 memcpy_toio(bo->kmap.virtual + src_offset, afbdev->sysram + src_offset, (x2 - x + 1) * bpp);
115
116 }
117 if (unmap)
118 ttm_bo_kunmap(&bo->kmap);
119
120 ast_bo_unreserve(bo);
121 }
122
ast_fillrect(struct fb_info * info,const struct fb_fillrect * rect)123 static void ast_fillrect(struct fb_info *info,
124 const struct fb_fillrect *rect)
125 {
126 struct ast_fbdev *afbdev = info->par;
127 sys_fillrect(info, rect);
128 ast_dirty_update(afbdev, rect->dx, rect->dy, rect->width,
129 rect->height);
130 }
131
ast_copyarea(struct fb_info * info,const struct fb_copyarea * area)132 static void ast_copyarea(struct fb_info *info,
133 const struct fb_copyarea *area)
134 {
135 struct ast_fbdev *afbdev = info->par;
136 sys_copyarea(info, area);
137 ast_dirty_update(afbdev, area->dx, area->dy, area->width,
138 area->height);
139 }
140
ast_imageblit(struct fb_info * info,const struct fb_image * image)141 static void ast_imageblit(struct fb_info *info,
142 const struct fb_image *image)
143 {
144 struct ast_fbdev *afbdev = info->par;
145 sys_imageblit(info, image);
146 ast_dirty_update(afbdev, image->dx, image->dy, image->width,
147 image->height);
148 }
149
150 static struct fb_ops astfb_ops = {
151 .owner = THIS_MODULE,
152 .fb_check_var = drm_fb_helper_check_var,
153 .fb_set_par = drm_fb_helper_set_par,
154 .fb_fillrect = ast_fillrect,
155 .fb_copyarea = ast_copyarea,
156 .fb_imageblit = ast_imageblit,
157 .fb_pan_display = drm_fb_helper_pan_display,
158 .fb_blank = drm_fb_helper_blank,
159 .fb_setcmap = drm_fb_helper_setcmap,
160 .fb_debug_enter = drm_fb_helper_debug_enter,
161 .fb_debug_leave = drm_fb_helper_debug_leave,
162 };
163
astfb_create_object(struct ast_fbdev * afbdev,struct drm_mode_fb_cmd2 * mode_cmd,struct drm_gem_object ** gobj_p)164 static int astfb_create_object(struct ast_fbdev *afbdev,
165 struct drm_mode_fb_cmd2 *mode_cmd,
166 struct drm_gem_object **gobj_p)
167 {
168 struct drm_device *dev = afbdev->helper.dev;
169 u32 bpp, depth;
170 u32 size;
171 struct drm_gem_object *gobj;
172
173 int ret = 0;
174 drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
175
176 size = mode_cmd->pitches[0] * mode_cmd->height;
177 ret = ast_gem_create(dev, size, true, &gobj);
178 if (ret)
179 return ret;
180
181 *gobj_p = gobj;
182 return ret;
183 }
184
astfb_create(struct drm_fb_helper * helper,struct drm_fb_helper_surface_size * sizes)185 static int astfb_create(struct drm_fb_helper *helper,
186 struct drm_fb_helper_surface_size *sizes)
187 {
188 struct ast_fbdev *afbdev = (struct ast_fbdev *)helper;
189 struct drm_device *dev = afbdev->helper.dev;
190 struct drm_mode_fb_cmd2 mode_cmd;
191 struct drm_framebuffer *fb;
192 struct fb_info *info;
193 int size, ret;
194 struct device *device = &dev->pdev->dev;
195 void *sysram;
196 struct drm_gem_object *gobj = NULL;
197 struct ast_bo *bo = NULL;
198 mode_cmd.width = sizes->surface_width;
199 mode_cmd.height = sizes->surface_height;
200 mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7)/8);
201
202 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
203 sizes->surface_depth);
204
205 size = mode_cmd.pitches[0] * mode_cmd.height;
206
207 ret = astfb_create_object(afbdev, &mode_cmd, &gobj);
208 if (ret) {
209 DRM_ERROR("failed to create fbcon backing object %d\n", ret);
210 return ret;
211 }
212 bo = gem_to_ast_bo(gobj);
213
214 sysram = vmalloc(size);
215 if (!sysram)
216 return -ENOMEM;
217
218 info = framebuffer_alloc(0, device);
219 if (!info) {
220 ret = -ENOMEM;
221 goto out;
222 }
223 info->par = afbdev;
224
225 ret = ast_framebuffer_init(dev, &afbdev->afb, &mode_cmd, gobj);
226 if (ret)
227 goto out;
228
229 afbdev->sysram = sysram;
230 afbdev->size = size;
231
232 fb = &afbdev->afb.base;
233 afbdev->helper.fb = fb;
234 afbdev->helper.fbdev = info;
235
236 strcpy(info->fix.id, "astdrmfb");
237
238 info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
239 info->fbops = &astfb_ops;
240
241 ret = fb_alloc_cmap(&info->cmap, 256, 0);
242 if (ret) {
243 ret = -ENOMEM;
244 goto out;
245 }
246
247 info->apertures = alloc_apertures(1);
248 if (!info->apertures) {
249 ret = -ENOMEM;
250 goto out;
251 }
252 info->apertures->ranges[0].base = pci_resource_start(dev->pdev, 0);
253 info->apertures->ranges[0].size = pci_resource_len(dev->pdev, 0);
254
255 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
256 drm_fb_helper_fill_var(info, &afbdev->helper, sizes->fb_width, sizes->fb_height);
257
258 info->screen_base = sysram;
259 info->screen_size = size;
260
261 info->pixmap.flags = FB_PIXMAP_SYSTEM;
262
263 DRM_DEBUG_KMS("allocated %dx%d\n",
264 fb->width, fb->height);
265
266 return 0;
267 out:
268 return ret;
269 }
270
ast_fb_gamma_set(struct drm_crtc * crtc,u16 red,u16 green,u16 blue,int regno)271 static void ast_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
272 u16 blue, int regno)
273 {
274 struct ast_crtc *ast_crtc = to_ast_crtc(crtc);
275 ast_crtc->lut_r[regno] = red >> 8;
276 ast_crtc->lut_g[regno] = green >> 8;
277 ast_crtc->lut_b[regno] = blue >> 8;
278 }
279
ast_fb_gamma_get(struct drm_crtc * crtc,u16 * red,u16 * green,u16 * blue,int regno)280 static void ast_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
281 u16 *blue, int regno)
282 {
283 struct ast_crtc *ast_crtc = to_ast_crtc(crtc);
284 *red = ast_crtc->lut_r[regno] << 8;
285 *green = ast_crtc->lut_g[regno] << 8;
286 *blue = ast_crtc->lut_b[regno] << 8;
287 }
288
289 static struct drm_fb_helper_funcs ast_fb_helper_funcs = {
290 .gamma_set = ast_fb_gamma_set,
291 .gamma_get = ast_fb_gamma_get,
292 .fb_probe = astfb_create,
293 };
294
ast_fbdev_destroy(struct drm_device * dev,struct ast_fbdev * afbdev)295 static void ast_fbdev_destroy(struct drm_device *dev,
296 struct ast_fbdev *afbdev)
297 {
298 struct fb_info *info;
299 struct ast_framebuffer *afb = &afbdev->afb;
300 if (afbdev->helper.fbdev) {
301 info = afbdev->helper.fbdev;
302 unregister_framebuffer(info);
303 if (info->cmap.len)
304 fb_dealloc_cmap(&info->cmap);
305 framebuffer_release(info);
306 }
307
308 if (afb->obj) {
309 drm_gem_object_unreference_unlocked(afb->obj);
310 afb->obj = NULL;
311 }
312 drm_fb_helper_fini(&afbdev->helper);
313
314 vfree(afbdev->sysram);
315 drm_framebuffer_unregister_private(&afb->base);
316 drm_framebuffer_cleanup(&afb->base);
317 }
318
ast_fbdev_init(struct drm_device * dev)319 int ast_fbdev_init(struct drm_device *dev)
320 {
321 struct ast_private *ast = dev->dev_private;
322 struct ast_fbdev *afbdev;
323 int ret;
324
325 afbdev = kzalloc(sizeof(struct ast_fbdev), GFP_KERNEL);
326 if (!afbdev)
327 return -ENOMEM;
328
329 ast->fbdev = afbdev;
330 afbdev->helper.funcs = &ast_fb_helper_funcs;
331 spin_lock_init(&afbdev->dirty_lock);
332 ret = drm_fb_helper_init(dev, &afbdev->helper,
333 1, 1);
334 if (ret) {
335 kfree(afbdev);
336 return ret;
337 }
338
339 drm_fb_helper_single_add_all_connectors(&afbdev->helper);
340
341 /* disable all the possible outputs/crtcs before entering KMS mode */
342 drm_helper_disable_unused_functions(dev);
343
344 drm_fb_helper_initial_config(&afbdev->helper, 32);
345 return 0;
346 }
347
ast_fbdev_fini(struct drm_device * dev)348 void ast_fbdev_fini(struct drm_device *dev)
349 {
350 struct ast_private *ast = dev->dev_private;
351
352 if (!ast->fbdev)
353 return;
354
355 ast_fbdev_destroy(dev, ast->fbdev);
356 kfree(ast->fbdev);
357 ast->fbdev = NULL;
358 }
359
ast_fbdev_set_suspend(struct drm_device * dev,int state)360 void ast_fbdev_set_suspend(struct drm_device *dev, int state)
361 {
362 struct ast_private *ast = dev->dev_private;
363
364 if (!ast->fbdev)
365 return;
366
367 fb_set_suspend(ast->fbdev->helper.fbdev, state);
368 }
369