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 #include <GLES/gl.h>
38
39 #include "gralloc_priv.h"
40 #include "fb_priv.h"
41 #include "gr.h"
42 #include <cutils/properties.h>
43 #include <profiler.h>
44
45 #define EVEN_OUT(x) if (x & 0x0001) {x--;}
46 /** min of int a, b */
min(int a,int b)47 static inline int min(int a, int b) {
48 return (a<b) ? a : b;
49 }
50 /** max of int a, b */
max(int a,int b)51 static inline int max(int a, int b) {
52 return (a>b) ? a : b;
53 }
54
55 enum {
56 PAGE_FLIP = 0x00000001,
57 };
58
59 struct fb_context_t {
60 framebuffer_device_t device;
61 //fd - which is returned on open
62 int fbFd;
63 };
64
fb_setSwapInterval(struct framebuffer_device_t * dev,int interval)65 static int fb_setSwapInterval(struct framebuffer_device_t* dev,
66 int interval)
67 {
68 #ifdef DEBUG_SWAPINTERVAL
69 //XXX: Get the value here and implement along with
70 //single vsync in HWC
71 char pval[PROPERTY_VALUE_MAX];
72 property_get("debug.egl.swapinterval", pval, "-1");
73 int property_interval = atoi(pval);
74 if (property_interval >= 0)
75 interval = property_interval;
76 #endif
77
78 private_module_t* m = reinterpret_cast<private_module_t*>(
79 dev->common.module);
80 if (interval < dev->minSwapInterval || interval > dev->maxSwapInterval)
81 return -EINVAL;
82
83 m->swapInterval = interval;
84 return 0;
85 }
86
fb_post(struct framebuffer_device_t * dev,buffer_handle_t buffer)87 static int fb_post(struct framebuffer_device_t* dev, buffer_handle_t buffer)
88 {
89 private_module_t* m =
90 reinterpret_cast<private_module_t*>(dev->common.module);
91 private_handle_t *hnd = static_cast<private_handle_t*>
92 (const_cast<native_handle_t*>(buffer));
93 fb_context_t *ctx = reinterpret_cast<fb_context_t*>(dev);
94 const unsigned int offset = (unsigned int) (hnd->base -
95 m->framebuffer->base);
96 m->info.activate = FB_ACTIVATE_VBL;
97 m->info.yoffset = (int)(offset / m->finfo.line_length);
98 if (ioctl(ctx->fbFd, FBIOPUT_VSCREENINFO, &m->info) == -1) {
99 ALOGE("%s: FBIOPUT_VSCREENINFO for primary failed, str: %s",
100 __FUNCTION__, strerror(errno));
101 return -errno;
102 }
103 return 0;
104 }
105
fb_compositionComplete(struct framebuffer_device_t * dev)106 static int fb_compositionComplete(struct framebuffer_device_t* dev)
107 {
108 // TODO: Properly implement composition complete callback
109 if(!dev) {
110 return -1;
111 }
112 glFinish();
113
114 return 0;
115 }
116
mapFrameBufferLocked(framebuffer_device_t * dev)117 int mapFrameBufferLocked(framebuffer_device_t *dev)
118 {
119 private_module_t* module =
120 reinterpret_cast<private_module_t*>(dev->common.module);
121 fb_context_t *ctx = reinterpret_cast<fb_context_t*>(dev);
122 // already initialized...
123 if (module->framebuffer) {
124 return 0;
125 }
126 char const * const device_template[] = {
127 "/dev/graphics/fb%u",
128 "/dev/fb%u",
129 0 };
130
131 int fd = -1;
132 int i=0;
133 char name[64];
134 char property[PROPERTY_VALUE_MAX];
135
136 while ((fd==-1) && device_template[i]) {
137 snprintf(name, 64, device_template[i], 0);
138 fd = open(name, O_RDWR, 0);
139 i++;
140 }
141 if (fd < 0)
142 return -errno;
143
144 struct fb_fix_screeninfo finfo;
145 if (ioctl(fd, FBIOGET_FSCREENINFO, &finfo) == -1) {
146 close(fd);
147 return -errno;
148 }
149
150 struct fb_var_screeninfo info;
151 if (ioctl(fd, FBIOGET_VSCREENINFO, &info) == -1) {
152 close(fd);
153 return -errno;
154 }
155
156 info.reserved[0] = 0;
157 info.reserved[1] = 0;
158 info.reserved[2] = 0;
159 info.xoffset = 0;
160 info.yoffset = 0;
161 info.activate = FB_ACTIVATE_NOW;
162
163 /* Interpretation of offset for color fields: All offsets are from the
164 * right, inside a "pixel" value, which is exactly 'bits_per_pixel' wide
165 * (means: you can use the offset as right argument to <<). A pixel
166 * afterwards is a bit stream and is written to video memory as that
167 * unmodified. This implies big-endian byte order if bits_per_pixel is
168 * greater than 8.
169 */
170
171 if(info.bits_per_pixel == 32) {
172 /*
173 * Explicitly request RGBA_8888
174 */
175 info.bits_per_pixel = 32;
176 info.red.offset = 24;
177 info.red.length = 8;
178 info.green.offset = 16;
179 info.green.length = 8;
180 info.blue.offset = 8;
181 info.blue.length = 8;
182 info.transp.offset = 0;
183 info.transp.length = 8;
184
185 /* Note: the GL driver does not have a r=8 g=8 b=8 a=0 config, so if we
186 * do not use the MDP for composition (i.e. hw composition == 0), ask
187 * for RGBA instead of RGBX. */
188 if (property_get("debug.sf.hw", property, NULL) > 0 &&
189 atoi(property) == 0)
190 module->fbFormat = HAL_PIXEL_FORMAT_RGBX_8888;
191 else if(property_get("debug.composition.type", property, NULL) > 0 &&
192 (strncmp(property, "mdp", 3) == 0))
193 module->fbFormat = HAL_PIXEL_FORMAT_RGBX_8888;
194 else
195 module->fbFormat = HAL_PIXEL_FORMAT_RGBA_8888;
196 } else {
197 /*
198 * Explicitly request 5/6/5
199 */
200 info.bits_per_pixel = 16;
201 info.red.offset = 11;
202 info.red.length = 5;
203 info.green.offset = 5;
204 info.green.length = 6;
205 info.blue.offset = 0;
206 info.blue.length = 5;
207 info.transp.offset = 0;
208 info.transp.length = 0;
209 module->fbFormat = HAL_PIXEL_FORMAT_RGB_565;
210 }
211
212 //adreno needs 4k aligned offsets. Max hole size is 4096-1
213 unsigned int size = roundUpToPageSize(info.yres * info.xres *
214 (info.bits_per_pixel/8));
215
216 /*
217 * Request NUM_BUFFERS screens (at least 2 for page flipping)
218 */
219 int numberOfBuffers = (int)(finfo.smem_len/size);
220 ALOGV("num supported framebuffers in kernel = %d", numberOfBuffers);
221
222 if (property_get("debug.gr.numframebuffers", property, NULL) > 0) {
223 int num = atoi(property);
224 if ((num >= NUM_FRAMEBUFFERS_MIN) && (num <= NUM_FRAMEBUFFERS_MAX)) {
225 numberOfBuffers = num;
226 }
227 }
228 if (numberOfBuffers > NUM_FRAMEBUFFERS_MAX)
229 numberOfBuffers = NUM_FRAMEBUFFERS_MAX;
230
231 ALOGV("We support %d buffers", numberOfBuffers);
232
233 //consider the included hole by 4k alignment
234 uint32_t line_length = (info.xres * info.bits_per_pixel / 8);
235 info.yres_virtual = (uint32_t) ((size * numberOfBuffers) / line_length);
236
237 uint32_t flags = PAGE_FLIP;
238
239 if (info.yres_virtual < ((size * 2) / line_length) ) {
240 // we need at least 2 for page-flipping
241 info.yres_virtual = (int)(size / line_length);
242 flags &= ~PAGE_FLIP;
243 ALOGW("page flipping not supported (yres_virtual=%d, requested=%d)",
244 info.yres_virtual, info.yres*2);
245 }
246
247 if (ioctl(fd, FBIOGET_VSCREENINFO, &info) == -1) {
248 close(fd);
249 return -errno;
250 }
251
252 if (int(info.width) <= 0 || int(info.height) <= 0) {
253 // the driver doesn't return that information
254 // default to 160 dpi
255 info.width = (uint32_t)(((float)(info.xres) * 25.4f)/160.0f + 0.5f);
256 info.height = (uint32_t)(((float)(info.yres) * 25.4f)/160.0f + 0.5f);
257 }
258
259 float xdpi = ((float)(info.xres) * 25.4f) / (float)info.width;
260 float ydpi = ((float)(info.yres) * 25.4f) / (float)info.height;
261
262 #ifdef MSMFB_METADATA_GET
263 struct msmfb_metadata metadata;
264 memset(&metadata, 0 , sizeof(metadata));
265 metadata.op = metadata_op_frame_rate;
266 if (ioctl(fd, MSMFB_METADATA_GET, &metadata) == -1) {
267 ALOGE("Error retrieving panel frame rate");
268 close(fd);
269 return -errno;
270 }
271 float fps = (float)metadata.data.panel_frame_rate;
272 #else
273 //XXX: Remove reserved field usage on all baselines
274 //The reserved[3] field is used to store FPS by the driver.
275 float fps = info.reserved[3] & 0xFF;
276 #endif
277 ALOGI("using (fd=%d)\n"
278 "id = %s\n"
279 "xres = %d px\n"
280 "yres = %d px\n"
281 "xres_virtual = %d px\n"
282 "yres_virtual = %d px\n"
283 "bpp = %d\n"
284 "r = %2u:%u\n"
285 "g = %2u:%u\n"
286 "b = %2u:%u\n",
287 fd,
288 finfo.id,
289 info.xres,
290 info.yres,
291 info.xres_virtual,
292 info.yres_virtual,
293 info.bits_per_pixel,
294 info.red.offset, info.red.length,
295 info.green.offset, info.green.length,
296 info.blue.offset, info.blue.length
297 );
298
299 ALOGI("width = %d mm (%f dpi)\n"
300 "height = %d mm (%f dpi)\n"
301 "refresh rate = %.2f Hz\n",
302 info.width, xdpi,
303 info.height, ydpi,
304 fps
305 );
306
307
308 if (ioctl(fd, FBIOGET_FSCREENINFO, &finfo) == -1) {
309 close(fd);
310 return -errno;
311 }
312
313 if (finfo.smem_len <= 0) {
314 close(fd);
315 return -errno;
316 }
317
318 module->flags = flags;
319 module->info = info;
320 module->finfo = finfo;
321 module->xdpi = xdpi;
322 module->ydpi = ydpi;
323 module->fps = fps;
324 module->swapInterval = 1;
325
326 CALC_INIT();
327
328 /*
329 * map the framebuffer
330 */
331
332 module->numBuffers = info.yres_virtual / info.yres;
333 module->bufferMask = 0;
334 //adreno needs page aligned offsets. Align the fbsize to pagesize.
335 unsigned int fbSize = roundUpToPageSize(finfo.line_length * info.yres)*
336 module->numBuffers;
337 void* vaddr = mmap(0, fbSize, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
338 if (vaddr == MAP_FAILED) {
339 ALOGE("Error mapping the framebuffer (%s)", strerror(errno));
340 close(fd);
341 return -errno;
342 }
343 //store the framebuffer fd in the ctx
344 ctx->fbFd = fd;
345 #ifdef MSMFB_METADATA_GET
346 memset(&metadata, 0 , sizeof(metadata));
347 metadata.op = metadata_op_get_ion_fd;
348 // get the ION fd for the framebuffer, as GPU needs ION fd
349 if (ioctl(fd, MSMFB_METADATA_GET, &metadata) == -1) {
350 ALOGE("Error getting ION fd (%s)", strerror(errno));
351 close(fd);
352 return -errno;
353 }
354 if(metadata.data.fbmem_ionfd < 0) {
355 ALOGE("Error: Ioctl returned invalid ION fd = %d",
356 metadata.data.fbmem_ionfd);
357 close(fd);
358 return -errno;
359 }
360 fd = metadata.data.fbmem_ionfd;
361 #endif
362 // Create framebuffer handle using the ION fd
363 module->framebuffer = new private_handle_t(fd, fbSize,
364 private_handle_t::PRIV_FLAGS_USES_ION,
365 BUFFER_TYPE_UI,
366 module->fbFormat, info.xres, info.yres);
367 module->framebuffer->base = uint64_t(vaddr);
368 memset(vaddr, 0, fbSize);
369 //Enable vsync
370 int enable = 1;
371 ioctl(ctx->fbFd, MSMFB_OVERLAY_VSYNC_CTRL, &enable);
372 return 0;
373 }
374
mapFrameBuffer(framebuffer_device_t * dev)375 static int mapFrameBuffer(framebuffer_device_t *dev)
376 {
377 int err = -1;
378 char property[PROPERTY_VALUE_MAX];
379 if((property_get("debug.gralloc.map_fb_memory", property, NULL) > 0) &&
380 (!strncmp(property, "1", PROPERTY_VALUE_MAX ) ||
381 (!strncasecmp(property,"true", PROPERTY_VALUE_MAX )))) {
382 private_module_t* module =
383 reinterpret_cast<private_module_t*>(dev->common.module);
384 pthread_mutex_lock(&module->lock);
385 err = mapFrameBufferLocked(dev);
386 pthread_mutex_unlock(&module->lock);
387 }
388 return err;
389 }
390
391 /*****************************************************************************/
392
fb_close(struct hw_device_t * dev)393 static int fb_close(struct hw_device_t *dev)
394 {
395 fb_context_t* ctx = (fb_context_t*)dev;
396 if (ctx) {
397 #ifdef MSMFB_METADATA_GET
398 if(ctx->fbFd >=0) {
399 close(ctx->fbFd);
400 }
401 #endif
402 //Hack until fbdev is removed. Framework could close this causing hwc a
403 //pain.
404 //free(ctx);
405 }
406 return 0;
407 }
408
fb_device_open(hw_module_t const * module,const char * name,hw_device_t ** device)409 int fb_device_open(hw_module_t const* module, const char* name,
410 hw_device_t** device)
411 {
412 int status = -EINVAL;
413 if (!strcmp(name, GRALLOC_HARDWARE_FB0)) {
414 alloc_device_t* gralloc_device;
415 status = gralloc_open(module, &gralloc_device);
416 if (status < 0)
417 return status;
418
419 /* initialize our state here */
420 fb_context_t *dev = (fb_context_t*)malloc(sizeof(*dev));
421 if(dev == NULL) {
422 gralloc_close(gralloc_device);
423 return status;
424 }
425 memset(dev, 0, sizeof(*dev));
426
427 /* initialize the procs */
428 dev->device.common.tag = HARDWARE_DEVICE_TAG;
429 dev->device.common.version = 0;
430 dev->device.common.module = const_cast<hw_module_t*>(module);
431 dev->device.common.close = fb_close;
432 dev->device.setSwapInterval = fb_setSwapInterval;
433 dev->device.post = fb_post;
434 dev->device.setUpdateRect = 0;
435 dev->device.compositionComplete = fb_compositionComplete;
436
437 status = mapFrameBuffer((framebuffer_device_t*)dev);
438 private_module_t* m = (private_module_t*)dev->device.common.module;
439 if (status >= 0) {
440 int stride = m->finfo.line_length / (m->info.bits_per_pixel >> 3);
441 const_cast<uint32_t&>(dev->device.flags) = 0;
442 const_cast<uint32_t&>(dev->device.width) = m->info.xres;
443 const_cast<uint32_t&>(dev->device.height) = m->info.yres;
444 const_cast<int&>(dev->device.stride) = stride;
445 const_cast<int&>(dev->device.format) = m->fbFormat;
446 const_cast<float&>(dev->device.xdpi) = m->xdpi;
447 const_cast<float&>(dev->device.ydpi) = m->ydpi;
448 const_cast<float&>(dev->device.fps) = m->fps;
449 const_cast<int&>(dev->device.minSwapInterval) =
450 PRIV_MIN_SWAP_INTERVAL;
451 const_cast<int&>(dev->device.maxSwapInterval) =
452 PRIV_MAX_SWAP_INTERVAL;
453 const_cast<int&>(dev->device.numFramebuffers) = m->numBuffers;
454 dev->device.setUpdateRect = 0;
455
456 *device = &dev->device.common;
457 }
458
459 // Close the gralloc module
460 gralloc_close(gralloc_device);
461 }
462 return status;
463 }
464