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 #include <cutils/properties.h>
24
25 #include <hardware/hardware.h>
26 #include <hardware/gralloc.h>
27
28 #include <fcntl.h>
29 #include <errno.h>
30 #include <sys/ioctl.h>
31 #include <string.h>
32 #include <stdlib.h>
33
34 #include <cutils/log.h>
35 #include <cutils/atomic.h>
36
37 #include <linux/fb.h>
38 #include <linux/msm_mdp.h>
39
40 #include <GLES/gl.h>
41
42 #include "gralloc_priv.h"
43 #include "gr.h"
44
45 /*****************************************************************************/
46
47 // numbers of buffers for page flipping
48 #define NUM_BUFFERS 2
49
50
51 enum {
52 PAGE_FLIP = 0x00000001,
53 LOCKED = 0x00000002
54 };
55
56 struct fb_context_t {
57 framebuffer_device_t device;
58 };
59
60 /*****************************************************************************/
61
62 static void
63 msm_copy_buffer(buffer_handle_t handle, int fd,
64 int width, int height, int format,
65 int x, int y, int w, int h);
66
fb_setSwapInterval(struct framebuffer_device_t * dev,int interval)67 static int fb_setSwapInterval(struct framebuffer_device_t* dev,
68 int interval)
69 {
70 fb_context_t* ctx = (fb_context_t*)dev;
71 if (interval < dev->minSwapInterval || interval > dev->maxSwapInterval)
72 return -EINVAL;
73 // FIXME: implement fb_setSwapInterval
74 return 0;
75 }
76
fb_setUpdateRect(struct framebuffer_device_t * dev,int l,int t,int w,int h)77 static int fb_setUpdateRect(struct framebuffer_device_t* dev,
78 int l, int t, int w, int h)
79 {
80 if (((w|h) <= 0) || ((l|t)<0))
81 return -EINVAL;
82
83 fb_context_t* ctx = (fb_context_t*)dev;
84 private_module_t* m = reinterpret_cast<private_module_t*>(
85 dev->common.module);
86 m->info.reserved[0] = 0x54445055; // "UPDT";
87 m->info.reserved[1] = (uint16_t)l | ((uint32_t)t << 16);
88 m->info.reserved[2] = (uint16_t)(l+w) | ((uint32_t)(t+h) << 16);
89 return 0;
90 }
91
fb_post(struct framebuffer_device_t * dev,buffer_handle_t buffer)92 static int fb_post(struct framebuffer_device_t* dev, buffer_handle_t buffer)
93 {
94 if (private_handle_t::validate(buffer) < 0)
95 return -EINVAL;
96
97 fb_context_t* ctx = (fb_context_t*)dev;
98
99 private_handle_t const* hnd = reinterpret_cast<private_handle_t const*>(buffer);
100 private_module_t* m = reinterpret_cast<private_module_t*>(
101 dev->common.module);
102
103 if (m->currentBuffer) {
104 m->base.unlock(&m->base, m->currentBuffer);
105 m->currentBuffer = 0;
106 }
107
108 if (hnd->flags & private_handle_t::PRIV_FLAGS_FRAMEBUFFER) {
109
110 m->base.lock(&m->base, buffer,
111 private_module_t::PRIV_USAGE_LOCKED_FOR_POST,
112 0, 0, m->info.xres, m->info.yres, NULL);
113
114 const size_t offset = hnd->base - m->framebuffer->base;
115 m->info.activate = FB_ACTIVATE_VBL;
116 m->info.yoffset = offset / m->finfo.line_length;
117 if (ioctl(m->framebuffer->fd, FBIOPUT_VSCREENINFO, &m->info) == -1) {
118 ALOGE("FBIOPUT_VSCREENINFO failed");
119 m->base.unlock(&m->base, buffer);
120 return -errno;
121 }
122 m->currentBuffer = buffer;
123
124 } else {
125 void* fb_vaddr;
126 void* buffer_vaddr;
127
128 m->base.lock(&m->base, m->framebuffer,
129 GRALLOC_USAGE_SW_WRITE_RARELY,
130 0, 0, m->info.xres, m->info.yres,
131 &fb_vaddr);
132
133 m->base.lock(&m->base, buffer,
134 GRALLOC_USAGE_SW_READ_RARELY,
135 0, 0, m->info.xres, m->info.yres,
136 &buffer_vaddr);
137
138 //memcpy(fb_vaddr, buffer_vaddr, m->finfo.line_length * m->info.yres);
139
140 msm_copy_buffer(
141 m->framebuffer, m->framebuffer->fd,
142 m->info.xres, m->info.yres, m->fbFormat,
143 m->info.xoffset, m->info.yoffset,
144 m->info.width, m->info.height);
145
146 m->base.unlock(&m->base, buffer);
147 m->base.unlock(&m->base, m->framebuffer);
148 }
149
150 return 0;
151 }
152
fb_compositionComplete(struct framebuffer_device_t * dev)153 static int fb_compositionComplete(struct framebuffer_device_t* dev)
154 {
155 // TODO: Properly implement composition complete callback
156 glFinish();
157
158 return 0;
159 }
160
161 /*****************************************************************************/
162
mapFrameBufferLocked(struct private_module_t * module)163 int mapFrameBufferLocked(struct private_module_t* module)
164 {
165 // already initialized...
166 if (module->framebuffer) {
167 return 0;
168 }
169
170 char const * const device_template[] = {
171 "/dev/graphics/fb%u",
172 "/dev/fb%u",
173 0 };
174
175 int fd = -1;
176 int i=0;
177 char name[64];
178
179 while ((fd==-1) && device_template[i]) {
180 snprintf(name, 64, device_template[i], 0);
181 fd = open(name, O_RDWR, 0);
182 i++;
183 }
184 if (fd < 0)
185 return -errno;
186
187 struct fb_fix_screeninfo finfo;
188 if (ioctl(fd, FBIOGET_FSCREENINFO, &finfo) == -1)
189 return -errno;
190
191 struct fb_var_screeninfo info;
192 if (ioctl(fd, FBIOGET_VSCREENINFO, &info) == -1)
193 return -errno;
194
195 info.reserved[0] = 0;
196 info.reserved[1] = 0;
197 info.reserved[2] = 0;
198 info.xoffset = 0;
199 info.yoffset = 0;
200 info.activate = FB_ACTIVATE_NOW;
201
202 /* Interpretation of offset for color fields: All offsets are from the right,
203 * inside a "pixel" value, which is exactly 'bits_per_pixel' wide (means: you
204 * can use the offset as right argument to <<). A pixel afterwards is a bit
205 * stream and is written to video memory as that unmodified. This implies
206 * big-endian byte order if bits_per_pixel is greater than 8.
207 */
208
209 /*
210 * Explicitly request RGBA_8888
211 */
212 info.bits_per_pixel = 32;
213 info.red.offset = 24;
214 info.red.length = 8;
215 info.green.offset = 16;
216 info.green.length = 8;
217 info.blue.offset = 8;
218 info.blue.length = 8;
219 info.transp.offset = 0;
220 info.transp.length = 0;
221
222 /* Note: the GL driver does not have a r=8 g=8 b=8 a=0 config, so if we do
223 * not use the MDP for composition (i.e. hw composition == 0), ask for
224 * RGBA instead of RGBX. */
225 char property[PROPERTY_VALUE_MAX];
226 if (property_get("debug.sf.hw", property, NULL) > 0 && atoi(property) == 0)
227 module->fbFormat = HAL_PIXEL_FORMAT_RGBX_8888;
228 else
229 module->fbFormat = HAL_PIXEL_FORMAT_RGBA_8888;
230
231 /*
232 * Request NUM_BUFFERS screens (at lest 2 for page flipping)
233 */
234 info.yres_virtual = info.yres * NUM_BUFFERS;
235
236
237 uint32_t flags = PAGE_FLIP;
238 if (ioctl(fd, FBIOPUT_VSCREENINFO, &info) == -1) {
239 info.yres_virtual = info.yres;
240 flags &= ~PAGE_FLIP;
241 ALOGW("FBIOPUT_VSCREENINFO failed, page flipping not supported");
242 }
243
244 if (info.yres_virtual < info.yres * 2) {
245 // we need at least 2 for page-flipping
246 info.yres_virtual = info.yres;
247 flags &= ~PAGE_FLIP;
248 ALOGW("page flipping not supported (yres_virtual=%d, requested=%d)",
249 info.yres_virtual, info.yres*2);
250 }
251
252 if (ioctl(fd, FBIOGET_VSCREENINFO, &info) == -1)
253 return -errno;
254
255 int refreshRate = 1000000000000000LLU /
256 (
257 uint64_t( info.upper_margin + info.lower_margin + info.yres )
258 * ( info.left_margin + info.right_margin + info.xres )
259 * info.pixclock
260 );
261
262 if (refreshRate == 0) {
263 // bleagh, bad info from the driver
264 refreshRate = 60*1000; // 60 Hz
265 }
266
267 if (int(info.width) <= 0 || int(info.height) <= 0) {
268 // the driver doesn't return that information
269 // default to 160 dpi
270 info.width = ((info.xres * 25.4f)/160.0f + 0.5f);
271 info.height = ((info.yres * 25.4f)/160.0f + 0.5f);
272 }
273
274 float xdpi = (info.xres * 25.4f) / info.width;
275 float ydpi = (info.yres * 25.4f) / info.height;
276 float fps = refreshRate / 1000.0f;
277
278 ALOGI( "using (fd=%d)\n"
279 "id = %s\n"
280 "xres = %d px\n"
281 "yres = %d px\n"
282 "xres_virtual = %d px\n"
283 "yres_virtual = %d px\n"
284 "bpp = %d\n"
285 "r = %2u:%u\n"
286 "g = %2u:%u\n"
287 "b = %2u:%u\n",
288 fd,
289 finfo.id,
290 info.xres,
291 info.yres,
292 info.xres_virtual,
293 info.yres_virtual,
294 info.bits_per_pixel,
295 info.red.offset, info.red.length,
296 info.green.offset, info.green.length,
297 info.blue.offset, info.blue.length
298 );
299
300 ALOGI( "width = %d mm (%f dpi)\n"
301 "height = %d mm (%f dpi)\n"
302 "refresh rate = %.2f Hz\n",
303 info.width, xdpi,
304 info.height, ydpi,
305 fps
306 );
307
308
309 if (ioctl(fd, FBIOGET_FSCREENINFO, &finfo) == -1)
310 return -errno;
311
312 if (finfo.smem_len <= 0)
313 return -errno;
314
315
316 module->flags = flags;
317 module->info = info;
318 module->finfo = finfo;
319 module->xdpi = xdpi;
320 module->ydpi = ydpi;
321 module->fps = fps;
322
323 /*
324 * map the framebuffer
325 */
326
327 int err;
328 size_t fbSize = roundUpToPageSize(finfo.line_length * info.yres_virtual);
329 module->framebuffer = new private_handle_t(dup(fd), fbSize,
330 private_handle_t::PRIV_FLAGS_USES_PMEM);
331
332 module->numBuffers = info.yres_virtual / info.yres;
333 module->bufferMask = 0;
334
335 void* vaddr = mmap(0, fbSize, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
336 if (vaddr == MAP_FAILED) {
337 ALOGE("Error mapping the framebuffer (%s)", strerror(errno));
338 return -errno;
339 }
340 module->framebuffer->base = intptr_t(vaddr);
341 memset(vaddr, 0, fbSize);
342 return 0;
343 }
344
mapFrameBuffer(struct private_module_t * module)345 static int mapFrameBuffer(struct private_module_t* module)
346 {
347 pthread_mutex_lock(&module->lock);
348 int err = mapFrameBufferLocked(module);
349 pthread_mutex_unlock(&module->lock);
350 return err;
351 }
352
353 /*****************************************************************************/
354
fb_close(struct hw_device_t * dev)355 static int fb_close(struct hw_device_t *dev)
356 {
357 fb_context_t* ctx = (fb_context_t*)dev;
358 if (ctx) {
359 free(ctx);
360 }
361 return 0;
362 }
363
fb_device_open(hw_module_t const * module,const char * name,hw_device_t ** device)364 int fb_device_open(hw_module_t const* module, const char* name,
365 hw_device_t** device)
366 {
367 int status = -EINVAL;
368 if (!strcmp(name, GRALLOC_HARDWARE_FB0)) {
369 alloc_device_t* gralloc_device;
370 status = gralloc_open(module, &gralloc_device);
371 if (status < 0)
372 return status;
373
374 /* initialize our state here */
375 fb_context_t *dev = (fb_context_t*)malloc(sizeof(*dev));
376 memset(dev, 0, sizeof(*dev));
377
378 /* initialize the procs */
379 dev->device.common.tag = HARDWARE_DEVICE_TAG;
380 dev->device.common.version = 0;
381 dev->device.common.module = const_cast<hw_module_t*>(module);
382 dev->device.common.close = fb_close;
383 dev->device.setSwapInterval = fb_setSwapInterval;
384 dev->device.post = fb_post;
385 dev->device.setUpdateRect = 0;
386 dev->device.compositionComplete = fb_compositionComplete;
387
388 private_module_t* m = (private_module_t*)module;
389 status = mapFrameBuffer(m);
390 if (status >= 0) {
391 int stride = m->finfo.line_length / (m->info.bits_per_pixel >> 3);
392 const_cast<uint32_t&>(dev->device.flags) = 0;
393 const_cast<uint32_t&>(dev->device.width) = m->info.xres;
394 const_cast<uint32_t&>(dev->device.height) = m->info.yres;
395 const_cast<int&>(dev->device.stride) = stride;
396 const_cast<int&>(dev->device.format) = m->fbFormat;
397 const_cast<float&>(dev->device.xdpi) = m->xdpi;
398 const_cast<float&>(dev->device.ydpi) = m->ydpi;
399 const_cast<float&>(dev->device.fps) = m->fps;
400 const_cast<int&>(dev->device.minSwapInterval) = 1;
401 const_cast<int&>(dev->device.maxSwapInterval) = 1;
402
403 if (m->finfo.reserved[0] == 0x5444 &&
404 m->finfo.reserved[1] == 0x5055) {
405 dev->device.setUpdateRect = fb_setUpdateRect;
406 ALOGD("UPDATE_ON_DEMAND supported");
407 }
408
409 *device = &dev->device.common;
410 }
411 }
412 return status;
413 }
414
415 /* Copy a pmem buffer to the framebuffer */
416
417 static void
msm_copy_buffer(buffer_handle_t handle,int fd,int width,int height,int format,int x,int y,int w,int h)418 msm_copy_buffer(buffer_handle_t handle, int fd,
419 int width, int height, int format,
420 int x, int y, int w, int h)
421 {
422 struct {
423 unsigned int count;
424 mdp_blit_req req;
425 } blit;
426 private_handle_t *priv = (private_handle_t*) handle;
427
428 memset(&blit, 0, sizeof(blit));
429 blit.count = 1;
430
431 blit.req.flags = 0;
432 blit.req.alpha = 0xff;
433 blit.req.transp_mask = 0xffffffff;
434
435 blit.req.src.width = width;
436 blit.req.src.height = height;
437 blit.req.src.offset = 0;
438 blit.req.src.memory_id = priv->fd;
439
440 blit.req.dst.width = width;
441 blit.req.dst.height = height;
442 blit.req.dst.offset = 0;
443 blit.req.dst.memory_id = fd;
444 blit.req.dst.format = format;
445
446 blit.req.src_rect.x = blit.req.dst_rect.x = x;
447 blit.req.src_rect.y = blit.req.dst_rect.y = y;
448 blit.req.src_rect.w = blit.req.dst_rect.w = w;
449 blit.req.src_rect.h = blit.req.dst_rect.h = h;
450
451 if (ioctl(fd, MSMFB_BLIT, &blit))
452 ALOGE("MSMFB_BLIT failed = %d", -errno);
453 }
454