1 /*
2 * Copyright (C) 2008 The Android Open Source Project
3 * Copyright (c) 2010-2014 The Linux Foundation. All rights reserved.
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 #include <sys/mman.h>
19
20 #include <cutils/log.h>
21 #include <cutils/properties.h>
22 #include <dlfcn.h>
23
24 #include <hardware/hardware.h>
25
26 #include <fcntl.h>
27 #include <errno.h>
28 #include <sys/ioctl.h>
29 #include <string.h>
30 #include <stdlib.h>
31 #include <pthread.h>
32 #include <cutils/atomic.h>
33
34 #include <linux/fb.h>
35 #include <linux/msm_mdp.h>
36
37 #ifndef TARGET_HEADLESS
38 #include <GLES/gl.h>
39 #endif
40
41 #include "gralloc_priv.h"
42 #include "fb_priv.h"
43 #include "gr.h"
44 #include <cutils/properties.h>
45 #include <profiler.h>
46
47 #define EVEN_OUT(x) if (x & 0x0001) {x--;}
48
49 enum {
50 PAGE_FLIP = 0x00000001,
51 };
52
53 struct fb_context_t {
54 framebuffer_device_t device;
55 //fd - which is returned on open
56 int fbFd;
57 };
58
fb_setSwapInterval(struct framebuffer_device_t * dev,int interval)59 static int fb_setSwapInterval(struct framebuffer_device_t* dev,
60 int interval)
61 {
62 //XXX: Get the value here and implement along with
63 //single vsync in HWC
64 char pval[PROPERTY_VALUE_MAX];
65 property_get("debug.egl.swapinterval", pval, "-1");
66 int property_interval = atoi(pval);
67 if (property_interval >= 0)
68 interval = property_interval;
69
70 private_module_t* m = reinterpret_cast<private_module_t*>(
71 dev->common.module);
72 if (interval < dev->minSwapInterval || interval > dev->maxSwapInterval)
73 return -EINVAL;
74
75 m->swapInterval = interval;
76 return 0;
77 }
78
fb_post(struct framebuffer_device_t * dev,buffer_handle_t buffer)79 static int fb_post(struct framebuffer_device_t* dev, buffer_handle_t buffer)
80 {
81 private_module_t* m =
82 reinterpret_cast<private_module_t*>(dev->common.module);
83 private_handle_t *hnd = static_cast<private_handle_t*>
84 (const_cast<native_handle_t*>(buffer));
85 fb_context_t *ctx = reinterpret_cast<fb_context_t*>(dev);
86 const unsigned int offset = (unsigned int) (hnd->base -
87 m->framebuffer->base);
88 m->info.activate = FB_ACTIVATE_VBL;
89 m->info.yoffset = (int)(offset / m->finfo.line_length);
90 if (ioctl(ctx->fbFd, FBIOPUT_VSCREENINFO, &m->info) == -1) {
91 ALOGE("%s: FBIOPUT_VSCREENINFO for primary failed, str: %s",
92 __FUNCTION__, strerror(errno));
93 return -errno;
94 }
95 return 0;
96 }
97
fb_compositionComplete(struct framebuffer_device_t * dev)98 static int fb_compositionComplete(struct framebuffer_device_t* dev)
99 {
100 // TODO: Properly implement composition complete callback
101 if(!dev) {
102 return -1;
103 }
104 #ifndef TARGET_HEADLESS
105 glFinish();
106 #endif
107
108 return 0;
109 }
110
mapFrameBufferLocked(framebuffer_device_t * dev)111 int mapFrameBufferLocked(framebuffer_device_t *dev)
112 {
113 private_module_t* module =
114 reinterpret_cast<private_module_t*>(dev->common.module);
115 fb_context_t *ctx = reinterpret_cast<fb_context_t*>(dev);
116 // already initialized...
117 if (module->framebuffer) {
118 return 0;
119 }
120 char const * const device_template[] = {
121 "/dev/graphics/fb%u",
122 "/dev/fb%u",
123 0 };
124
125 int fd = -1;
126 int i=0;
127 char name[64];
128 char property[PROPERTY_VALUE_MAX];
129
130 while ((fd==-1) && device_template[i]) {
131 snprintf(name, 64, device_template[i], 0);
132 fd = open(name, O_RDWR, 0);
133 i++;
134 }
135 if (fd < 0)
136 return -errno;
137
138 struct fb_fix_screeninfo finfo;
139 if (ioctl(fd, FBIOGET_FSCREENINFO, &finfo) == -1) {
140 close(fd);
141 return -errno;
142 }
143
144 struct fb_var_screeninfo info;
145 if (ioctl(fd, FBIOGET_VSCREENINFO, &info) == -1) {
146 close(fd);
147 return -errno;
148 }
149
150 info.reserved[0] = 0;
151 info.reserved[1] = 0;
152 info.reserved[2] = 0;
153 info.xoffset = 0;
154 info.yoffset = 0;
155 info.activate = FB_ACTIVATE_NOW;
156
157 /* Interpretation of offset for color fields: All offsets are from the
158 * right, inside a "pixel" value, which is exactly 'bits_per_pixel' wide
159 * (means: you can use the offset as right argument to <<). A pixel
160 * afterwards is a bit stream and is written to video memory as that
161 * unmodified. This implies big-endian byte order if bits_per_pixel is
162 * greater than 8.
163 */
164
165 if(info.bits_per_pixel == 32) {
166 /*
167 * Explicitly request RGBA_8888
168 */
169 info.bits_per_pixel = 32;
170 info.red.offset = 24;
171 info.red.length = 8;
172 info.green.offset = 16;
173 info.green.length = 8;
174 info.blue.offset = 8;
175 info.blue.length = 8;
176 info.transp.offset = 0;
177 info.transp.length = 8;
178
179 /* Note: the GL driver does not have a r=8 g=8 b=8 a=0 config, so if we
180 * do not use the MDP for composition (i.e. hw composition == 0), ask
181 * for RGBA instead of RGBX. */
182 if (property_get("debug.sf.hw", property, NULL) > 0 &&
183 atoi(property) == 0)
184 module->fbFormat = HAL_PIXEL_FORMAT_RGBX_8888;
185 else if(property_get("debug.composition.type", property, NULL) > 0 &&
186 (strncmp(property, "mdp", 3) == 0))
187 module->fbFormat = HAL_PIXEL_FORMAT_RGBX_8888;
188 else
189 module->fbFormat = HAL_PIXEL_FORMAT_RGBA_8888;
190 } else {
191 /*
192 * Explicitly request 5/6/5
193 */
194 info.bits_per_pixel = 16;
195 info.red.offset = 11;
196 info.red.length = 5;
197 info.green.offset = 5;
198 info.green.length = 6;
199 info.blue.offset = 0;
200 info.blue.length = 5;
201 info.transp.offset = 0;
202 info.transp.length = 0;
203 module->fbFormat = HAL_PIXEL_FORMAT_RGB_565;
204 }
205
206 //adreno needs 4k aligned offsets. Max hole size is 4096-1
207 unsigned int size = roundUpToPageSize(info.yres * info.xres *
208 (info.bits_per_pixel/8));
209
210 /*
211 * Request NUM_BUFFERS screens (at least 2 for page flipping)
212 */
213 int numberOfBuffers = (int)(finfo.smem_len/size);
214 ALOGV("num supported framebuffers in kernel = %d", numberOfBuffers);
215
216 if (property_get("debug.gr.numframebuffers", property, NULL) > 0) {
217 int num = atoi(property);
218 if ((num >= NUM_FRAMEBUFFERS_MIN) && (num <= NUM_FRAMEBUFFERS_MAX)) {
219 numberOfBuffers = num;
220 }
221 }
222 if (numberOfBuffers > NUM_FRAMEBUFFERS_MAX)
223 numberOfBuffers = NUM_FRAMEBUFFERS_MAX;
224
225 ALOGV("We support %d buffers", numberOfBuffers);
226
227 //consider the included hole by 4k alignment
228 uint32_t line_length = (info.xres * info.bits_per_pixel / 8);
229 info.yres_virtual = (uint32_t) ((size * numberOfBuffers) / line_length);
230
231 uint32_t flags = PAGE_FLIP;
232
233 if (info.yres_virtual < ((size * 2) / line_length) ) {
234 // we need at least 2 for page-flipping
235 info.yres_virtual = (int)(size / line_length);
236 flags &= ~PAGE_FLIP;
237 ALOGW("page flipping not supported (yres_virtual=%d, requested=%d)",
238 info.yres_virtual, info.yres*2);
239 }
240
241 if (ioctl(fd, FBIOGET_VSCREENINFO, &info) == -1) {
242 close(fd);
243 return -errno;
244 }
245
246 if (int(info.width) <= 0 || int(info.height) <= 0) {
247 // the driver doesn't return that information
248 // default to 160 dpi
249 info.width = (uint32_t)(((float)(info.xres) * 25.4f)/160.0f + 0.5f);
250 info.height = (uint32_t)(((float)(info.yres) * 25.4f)/160.0f + 0.5f);
251 }
252
253 float xdpi = ((float)(info.xres) * 25.4f) / (float)info.width;
254 float ydpi = ((float)(info.yres) * 25.4f) / (float)info.height;
255
256 #ifdef MSMFB_METADATA_GET
257 struct msmfb_metadata metadata;
258 memset(&metadata, 0 , sizeof(metadata));
259 metadata.op = metadata_op_frame_rate;
260 if (ioctl(fd, MSMFB_METADATA_GET, &metadata) == -1) {
261 ALOGE("Error retrieving panel frame rate");
262 close(fd);
263 return -errno;
264 }
265 float fps = (float)metadata.data.panel_frame_rate;
266 #else
267 //XXX: Remove reserved field usage on all baselines
268 //The reserved[3] field is used to store FPS by the driver.
269 float fps = info.reserved[3] & 0xFF;
270 #endif
271 ALOGI("using (fd=%d)\n"
272 "id = %s\n"
273 "xres = %d px\n"
274 "yres = %d px\n"
275 "xres_virtual = %d px\n"
276 "yres_virtual = %d px\n"
277 "bpp = %d\n"
278 "r = %2u:%u\n"
279 "g = %2u:%u\n"
280 "b = %2u:%u\n",
281 fd,
282 finfo.id,
283 info.xres,
284 info.yres,
285 info.xres_virtual,
286 info.yres_virtual,
287 info.bits_per_pixel,
288 info.red.offset, info.red.length,
289 info.green.offset, info.green.length,
290 info.blue.offset, info.blue.length
291 );
292
293 ALOGI("width = %d mm (%f dpi)\n"
294 "height = %d mm (%f dpi)\n"
295 "refresh rate = %.2f Hz\n",
296 info.width, xdpi,
297 info.height, ydpi,
298 fps
299 );
300
301
302 if (ioctl(fd, FBIOGET_FSCREENINFO, &finfo) == -1) {
303 close(fd);
304 return -errno;
305 }
306
307 if (finfo.smem_len <= 0) {
308 close(fd);
309 return -errno;
310 }
311
312 module->flags = flags;
313 module->info = info;
314 module->finfo = finfo;
315 module->xdpi = xdpi;
316 module->ydpi = ydpi;
317 module->fps = fps;
318 module->swapInterval = 1;
319
320 CALC_INIT();
321
322 /*
323 * map the framebuffer
324 */
325
326 module->numBuffers = info.yres_virtual / info.yres;
327 module->bufferMask = 0;
328 //adreno needs page aligned offsets. Align the fbsize to pagesize.
329 unsigned int fbSize = roundUpToPageSize(finfo.line_length * info.yres)*
330 module->numBuffers;
331 void* vaddr = mmap(0, fbSize, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
332 if (vaddr == MAP_FAILED) {
333 ALOGE("Error mapping the framebuffer (%s)", strerror(errno));
334 close(fd);
335 return -errno;
336 }
337 //store the framebuffer fd in the ctx
338 ctx->fbFd = fd;
339 #ifdef MSMFB_METADATA_GET
340 memset(&metadata, 0 , sizeof(metadata));
341 metadata.op = metadata_op_get_ion_fd;
342 // get the ION fd for the framebuffer, as GPU needs ION fd
343 if (ioctl(fd, MSMFB_METADATA_GET, &metadata) == -1) {
344 ALOGE("Error getting ION fd (%s)", strerror(errno));
345 close(fd);
346 return -errno;
347 }
348 if(metadata.data.fbmem_ionfd < 0) {
349 ALOGE("Error: Ioctl returned invalid ION fd = %d",
350 metadata.data.fbmem_ionfd);
351 close(fd);
352 return -errno;
353 }
354 fd = metadata.data.fbmem_ionfd;
355 #endif
356 // Create framebuffer handle using the ION fd
357 module->framebuffer = new private_handle_t(fd, fbSize,
358 private_handle_t::PRIV_FLAGS_USES_ION,
359 BUFFER_TYPE_UI,
360 module->fbFormat, info.xres, info.yres);
361 module->framebuffer->base = uint64_t(vaddr);
362 memset(vaddr, 0, fbSize);
363 //Enable vsync
364 int enable = 1;
365 ioctl(ctx->fbFd, MSMFB_OVERLAY_VSYNC_CTRL, &enable);
366 return 0;
367 }
368
mapFrameBuffer(framebuffer_device_t * dev)369 static int mapFrameBuffer(framebuffer_device_t *dev)
370 {
371 int err = -1;
372 char property[PROPERTY_VALUE_MAX];
373 if((property_get("debug.gralloc.map_fb_memory", property, NULL) > 0) &&
374 (!strncmp(property, "1", PROPERTY_VALUE_MAX ) ||
375 (!strncasecmp(property,"true", PROPERTY_VALUE_MAX )))) {
376 private_module_t* module =
377 reinterpret_cast<private_module_t*>(dev->common.module);
378 pthread_mutex_lock(&module->lock);
379 err = mapFrameBufferLocked(dev);
380 pthread_mutex_unlock(&module->lock);
381 }
382 return err;
383 }
384
385 /*****************************************************************************/
386
fb_close(struct hw_device_t * dev)387 static int fb_close(struct hw_device_t *dev)
388 {
389 fb_context_t* ctx = (fb_context_t*)dev;
390 if (ctx) {
391 #ifdef MSMFB_METADATA_GET
392 if(ctx->fbFd >=0) {
393 close(ctx->fbFd);
394 }
395 #endif
396 //Hack until fbdev is removed. Framework could close this causing hwc a
397 //pain.
398 //free(ctx);
399 }
400 return 0;
401 }
402
fb_device_open(hw_module_t const * module,const char * name,hw_device_t ** device)403 int fb_device_open(hw_module_t const* module, const char* name,
404 hw_device_t** device)
405 {
406 int status = -EINVAL;
407 if (!strcmp(name, GRALLOC_HARDWARE_FB0)) {
408 alloc_device_t* gralloc_device;
409 status = gralloc_open(module, &gralloc_device);
410 if (status < 0)
411 return status;
412
413 /* initialize our state here */
414 fb_context_t *dev = (fb_context_t*)malloc(sizeof(*dev));
415 if(dev == NULL) {
416 gralloc_close(gralloc_device);
417 return status;
418 }
419 memset(dev, 0, sizeof(*dev));
420
421 /* initialize the procs */
422 dev->device.common.tag = HARDWARE_DEVICE_TAG;
423 dev->device.common.version = 0;
424 dev->device.common.module = const_cast<hw_module_t*>(module);
425 dev->device.common.close = fb_close;
426 dev->device.setSwapInterval = fb_setSwapInterval;
427 dev->device.post = fb_post;
428 dev->device.setUpdateRect = 0;
429 dev->device.compositionComplete = fb_compositionComplete;
430
431 status = mapFrameBuffer((framebuffer_device_t*)dev);
432 private_module_t* m = (private_module_t*)dev->device.common.module;
433 if (status >= 0) {
434 int stride = m->finfo.line_length / (m->info.bits_per_pixel >> 3);
435 const_cast<uint32_t&>(dev->device.flags) = 0;
436 const_cast<uint32_t&>(dev->device.width) = m->info.xres;
437 const_cast<uint32_t&>(dev->device.height) = m->info.yres;
438 const_cast<int&>(dev->device.stride) = stride;
439 const_cast<int&>(dev->device.format) = m->fbFormat;
440 const_cast<float&>(dev->device.xdpi) = m->xdpi;
441 const_cast<float&>(dev->device.ydpi) = m->ydpi;
442 const_cast<float&>(dev->device.fps) = m->fps;
443 const_cast<int&>(dev->device.minSwapInterval) =
444 PRIV_MIN_SWAP_INTERVAL;
445 const_cast<int&>(dev->device.maxSwapInterval) =
446 PRIV_MAX_SWAP_INTERVAL;
447 const_cast<int&>(dev->device.numFramebuffers) = m->numBuffers;
448 dev->device.setUpdateRect = 0;
449
450 *device = &dev->device.common;
451 }
452
453 // Close the gralloc module
454 gralloc_close(gralloc_device);
455 }
456 return status;
457 }
458