1 /*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <sys/mman.h>
18
19 #include <dlfcn.h>
20
21 #include <cutils/ashmem.h>
22 #include <cutils/log.h>
23
24 #include <hardware/hardware.h>
25 #include <hardware/gralloc.h>
26
27 #include <fcntl.h>
28 #include <errno.h>
29 #include <sys/ioctl.h>
30 #include <string.h>
31 #include <stdlib.h>
32
33 #include <cutils/log.h>
34 #include <cutils/atomic.h>
35
36 #include <linux/fb.h>
37 #include <linux/msm_mdp.h>
38
39 #include "gralloc_priv.h"
40 #include "gr.h"
41
42 /*****************************************************************************/
43
44 // numbers of buffers for page flipping
45 #define NUM_BUFFERS 2
46
47
48 enum {
49 PAGE_FLIP = 0x00000001,
50 LOCKED = 0x00000002
51 };
52
53 struct fb_context_t {
54 framebuffer_device_t device;
55 };
56
57 /*****************************************************************************/
58
59 static void
60 msm_copy_buffer(buffer_handle_t handle, int fd, int width, int height,
61 int x, int y, int w, int h);
62
fb_setSwapInterval(struct framebuffer_device_t * dev,int interval)63 static int fb_setSwapInterval(struct framebuffer_device_t* dev,
64 int interval)
65 {
66 fb_context_t* ctx = (fb_context_t*)dev;
67 if (interval < dev->minSwapInterval || interval > dev->maxSwapInterval)
68 return -EINVAL;
69 // FIXME: implement fb_setSwapInterval
70 return 0;
71 }
72
fb_setUpdateRect(struct framebuffer_device_t * dev,int l,int t,int w,int h)73 static int fb_setUpdateRect(struct framebuffer_device_t* dev,
74 int l, int t, int w, int h)
75 {
76 if (((w|h) <= 0) || ((l|t)<0))
77 return -EINVAL;
78
79 fb_context_t* ctx = (fb_context_t*)dev;
80 private_module_t* m = reinterpret_cast<private_module_t*>(
81 dev->common.module);
82 m->info.reserved[0] = 0x54445055; // "UPDT";
83 m->info.reserved[1] = (uint16_t)l | ((uint32_t)t << 16);
84 m->info.reserved[2] = (uint16_t)(l+w) | ((uint32_t)(t+h) << 16);
85 return 0;
86 }
87
fb_post(struct framebuffer_device_t * dev,buffer_handle_t buffer)88 static int fb_post(struct framebuffer_device_t* dev, buffer_handle_t buffer)
89 {
90 if (private_handle_t::validate(buffer) < 0)
91 return -EINVAL;
92
93 fb_context_t* ctx = (fb_context_t*)dev;
94
95 private_handle_t const* hnd = reinterpret_cast<private_handle_t const*>(buffer);
96 private_module_t* m = reinterpret_cast<private_module_t*>(
97 dev->common.module);
98
99 if (hnd->flags & private_handle_t::PRIV_FLAGS_FRAMEBUFFER) {
100 const size_t offset = hnd->base - m->framebuffer->base;
101 m->info.activate = FB_ACTIVATE_VBL;
102 m->info.yoffset = offset / m->finfo.line_length;
103 if (ioctl(m->framebuffer->fd, FBIOPUT_VSCREENINFO, &m->info) == -1) {
104 ALOGE("FBIOPUT_VSCREENINFO failed");
105 m->base.unlock(&m->base, buffer);
106 return -errno;
107 }
108 m->currentBuffer = buffer;
109
110 } else {
111 // If we can't do the page_flip, just copy the buffer to the front
112 // FIXME: use copybit HAL instead of memcpy
113
114 void* fb_vaddr;
115 void* buffer_vaddr;
116
117 m->base.lock(&m->base, m->framebuffer,
118 GRALLOC_USAGE_SW_WRITE_RARELY,
119 0, 0, m->info.xres, m->info.yres,
120 &fb_vaddr);
121
122 m->base.lock(&m->base, buffer,
123 GRALLOC_USAGE_SW_READ_RARELY,
124 0, 0, m->info.xres, m->info.yres,
125 &buffer_vaddr);
126
127 //memcpy(fb_vaddr, buffer_vaddr, m->finfo.line_length * m->info.yres);
128
129 msm_copy_buffer(m->framebuffer, m->framebuffer->fd,
130 m->info.xres, m->info.yres,
131 m->info.xoffset, m->info.yoffset,
132 m->info.width, m->info.height);
133
134 m->base.unlock(&m->base, buffer);
135 m->base.unlock(&m->base, m->framebuffer);
136 }
137
138 return 0;
139 }
140
141 /*****************************************************************************/
142
mapFrameBufferLocked(struct private_module_t * module)143 int mapFrameBufferLocked(struct private_module_t* module)
144 {
145 // already initialized...
146 if (module->framebuffer) {
147 return 0;
148 }
149
150 char const * const device_template[] = {
151 "/dev/graphics/fb%u",
152 "/dev/fb%u",
153 0 };
154
155 int fd = -1;
156 int i=0;
157 char name[64];
158
159 while ((fd==-1) && device_template[i]) {
160 snprintf(name, 64, device_template[i], 0);
161 fd = open(name, O_RDWR, 0);
162 i++;
163 }
164 if (fd < 0)
165 return -errno;
166
167 struct fb_fix_screeninfo finfo;
168 if (ioctl(fd, FBIOGET_FSCREENINFO, &finfo) == -1)
169 return -errno;
170
171 struct fb_var_screeninfo info;
172 if (ioctl(fd, FBIOGET_VSCREENINFO, &info) == -1)
173 return -errno;
174
175 info.reserved[0] = 0;
176 info.reserved[1] = 0;
177 info.reserved[2] = 0;
178 info.xoffset = 0;
179 info.yoffset = 0;
180 info.activate = FB_ACTIVATE_NOW;
181
182 /*
183 * Explicitly request 5/6/5
184 */
185 info.bits_per_pixel = 16;
186 info.red.offset = 11;
187 info.red.length = 5;
188 info.green.offset = 5;
189 info.green.length = 6;
190 info.blue.offset = 0;
191 info.blue.length = 5;
192 info.transp.offset = 0;
193 info.transp.length = 0;
194
195 /*
196 * Request NUM_BUFFERS screens (at lest 2 for page flipping)
197 */
198 info.yres_virtual = info.yres * NUM_BUFFERS;
199
200
201 uint32_t flags = PAGE_FLIP;
202 if (ioctl(fd, FBIOPUT_VSCREENINFO, &info) == -1) {
203 info.yres_virtual = info.yres;
204 flags &= ~PAGE_FLIP;
205 ALOGW("FBIOPUT_VSCREENINFO failed, page flipping not supported");
206 }
207
208 if (info.yres_virtual < info.yres * 2) {
209 // we need at least 2 for page-flipping
210 info.yres_virtual = info.yres;
211 flags &= ~PAGE_FLIP;
212 ALOGW("page flipping not supported (yres_virtual=%d, requested=%d)",
213 info.yres_virtual, info.yres*2);
214 }
215
216 if (ioctl(fd, FBIOGET_VSCREENINFO, &info) == -1)
217 return -errno;
218
219 int refreshRate = 1000000000000000LLU /
220 (
221 uint64_t( info.upper_margin + info.lower_margin + info.yres )
222 * ( info.left_margin + info.right_margin + info.xres )
223 * info.pixclock
224 );
225
226 if (refreshRate == 0) {
227 // bleagh, bad info from the driver
228 refreshRate = 60*1000; // 60 Hz
229 }
230
231 if (int(info.width) <= 0 || int(info.height) <= 0) {
232 // the driver doesn't return that information
233 // default to 160 dpi
234 info.width = ((info.xres * 25.4f)/160.0f + 0.5f);
235 info.height = ((info.yres * 25.4f)/160.0f + 0.5f);
236 }
237
238 float xdpi = (info.xres * 25.4f) / info.width;
239 float ydpi = (info.yres * 25.4f) / info.height;
240 float fps = refreshRate / 1000.0f;
241
242 ALOGI( "using (fd=%d)\n"
243 "id = %s\n"
244 "xres = %d px\n"
245 "yres = %d px\n"
246 "xres_virtual = %d px\n"
247 "yres_virtual = %d px\n"
248 "bpp = %d\n"
249 "r = %2u:%u\n"
250 "g = %2u:%u\n"
251 "b = %2u:%u\n",
252 fd,
253 finfo.id,
254 info.xres,
255 info.yres,
256 info.xres_virtual,
257 info.yres_virtual,
258 info.bits_per_pixel,
259 info.red.offset, info.red.length,
260 info.green.offset, info.green.length,
261 info.blue.offset, info.blue.length
262 );
263
264 ALOGI( "width = %d mm (%f dpi)\n"
265 "height = %d mm (%f dpi)\n"
266 "refresh rate = %.2f Hz\n",
267 info.width, xdpi,
268 info.height, ydpi,
269 fps
270 );
271
272
273 if (ioctl(fd, FBIOGET_FSCREENINFO, &finfo) == -1)
274 return -errno;
275
276 if (finfo.smem_len <= 0)
277 return -errno;
278
279
280 module->flags = flags;
281 module->info = info;
282 module->finfo = finfo;
283 module->xdpi = xdpi;
284 module->ydpi = ydpi;
285 module->fps = fps;
286
287 /*
288 * map the framebuffer
289 */
290
291 int err;
292 size_t fbSize = roundUpToPageSize(finfo.line_length * info.yres_virtual);
293 module->framebuffer = new private_handle_t(dup(fd), fbSize,
294 private_handle_t::PRIV_FLAGS_USES_PMEM);
295
296 module->numBuffers = info.yres_virtual / info.yres;
297 module->bufferMask = 0;
298
299 void* vaddr = mmap(0, fbSize, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
300 if (vaddr == MAP_FAILED) {
301 ALOGE("Error mapping the framebuffer (%s)", strerror(errno));
302 return -errno;
303 }
304 module->framebuffer->base = intptr_t(vaddr);
305
306 memset(vaddr, 0, fbSize);
307 return 0;
308 }
309
mapFrameBuffer(struct private_module_t * module)310 static int mapFrameBuffer(struct private_module_t* module)
311 {
312 pthread_mutex_lock(&module->lock);
313 int err = mapFrameBufferLocked(module);
314 pthread_mutex_unlock(&module->lock);
315 return err;
316 }
317
318 /*****************************************************************************/
319
fb_close(struct hw_device_t * dev)320 static int fb_close(struct hw_device_t *dev)
321 {
322 fb_context_t* ctx = (fb_context_t*)dev;
323 if (ctx) {
324 free(ctx);
325 }
326 return 0;
327 }
328
fb_device_open(hw_module_t const * module,const char * name,hw_device_t ** device)329 int fb_device_open(hw_module_t const* module, const char* name,
330 hw_device_t** device)
331 {
332 int status = -EINVAL;
333 if (!strcmp(name, GRALLOC_HARDWARE_FB0)) {
334 alloc_device_t* gralloc_device;
335 status = gralloc_open(module, &gralloc_device);
336 if (status < 0)
337 return status;
338
339 /* initialize our state here */
340 fb_context_t *dev = (fb_context_t*)malloc(sizeof(*dev));
341 memset(dev, 0, sizeof(*dev));
342
343 /* initialize the procs */
344 dev->device.common.tag = HARDWARE_DEVICE_TAG;
345 dev->device.common.version = 0;
346 dev->device.common.module = const_cast<hw_module_t*>(module);
347 dev->device.common.close = fb_close;
348 dev->device.setSwapInterval = fb_setSwapInterval;
349 dev->device.post = fb_post;
350 dev->device.setUpdateRect = 0;
351
352 private_module_t* m = (private_module_t*)module;
353 status = mapFrameBuffer(m);
354 if (status >= 0) {
355 int stride = m->finfo.line_length / (m->info.bits_per_pixel >> 3);
356 const_cast<uint32_t&>(dev->device.flags) = 0;
357 const_cast<uint32_t&>(dev->device.width) = m->info.xres;
358 const_cast<uint32_t&>(dev->device.height) = m->info.yres;
359 const_cast<int&>(dev->device.stride) = stride;
360 const_cast<int&>(dev->device.format) = HAL_PIXEL_FORMAT_RGB_565;
361 const_cast<float&>(dev->device.xdpi) = m->xdpi;
362 const_cast<float&>(dev->device.ydpi) = m->ydpi;
363 const_cast<float&>(dev->device.fps) = m->fps;
364 const_cast<int&>(dev->device.minSwapInterval) = 1;
365 const_cast<int&>(dev->device.maxSwapInterval) = 1;
366
367 if (m->finfo.reserved[0] == 0x5444 &&
368 m->finfo.reserved[1] == 0x5055) {
369 dev->device.setUpdateRect = fb_setUpdateRect;
370 ALOGD("UPDATE_ON_DEMAND supported");
371 }
372
373 *device = &dev->device.common;
374 }
375 }
376 return status;
377 }
378
379 /* Copy a pmem buffer to the framebuffer */
380
381 static void
msm_copy_buffer(buffer_handle_t handle,int fd,int width,int height,int x,int y,int w,int h)382 msm_copy_buffer(buffer_handle_t handle, int fd, int width, int height,
383 int x, int y, int w, int h)
384 {
385 struct {
386 unsigned int count;
387 mdp_blit_req req;
388 } blit;
389 private_handle_t *priv = (private_handle_t*) handle;
390
391 memset(&blit, 0, sizeof(blit));
392 blit.count = 1;
393
394 blit.req.flags = 0;
395 blit.req.alpha = 0xff;
396 blit.req.transp_mask = 0xffffffff;
397
398 blit.req.src.width = width;
399 blit.req.src.height = height;
400 blit.req.src.offset = 0;
401 blit.req.src.memory_id = priv->fd;
402
403 blit.req.dst.width = width;
404 blit.req.dst.height = height;
405 blit.req.dst.offset = 0;
406 blit.req.dst.memory_id = fd;
407 blit.req.dst.format = MDP_RGB_565;
408
409 blit.req.src_rect.x = blit.req.dst_rect.x = x;
410 blit.req.src_rect.y = blit.req.dst_rect.y = y;
411 blit.req.src_rect.w = blit.req.dst_rect.w = w;
412 blit.req.src_rect.h = blit.req.dst_rect.h = h;
413
414 if (ioctl(fd, MSMFB_BLIT, &blit))
415 ALOGE("MSMFB_BLIT failed = %d", -errno);
416 }
417