1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * Copyright (c) 2010-2013 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 */ 47 static inline int min(int a, int b) { 48 return (a<b) ? a : b; 49 } 50 /** max of int a, 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 }; 62 63 64 static int fb_setSwapInterval(struct framebuffer_device_t* dev, 65 int interval) 66 { 67 //XXX: Get the value here and implement along with 68 //single vsync in HWC 69 char pval[PROPERTY_VALUE_MAX]; 70 property_get("debug.egl.swapinterval", pval, "-1"); 71 int property_interval = atoi(pval); 72 if (property_interval >= 0) 73 interval = property_interval; 74 75 fb_context_t* ctx = (fb_context_t*)dev; 76 private_module_t* m = reinterpret_cast<private_module_t*>( 77 dev->common.module); 78 if (interval < dev->minSwapInterval || interval > dev->maxSwapInterval) 79 return -EINVAL; 80 81 m->swapInterval = interval; 82 return 0; 83 } 84 85 static int fb_post(struct framebuffer_device_t* dev, buffer_handle_t buffer) 86 { 87 private_module_t* m = 88 reinterpret_cast<private_module_t*>(dev->common.module); 89 private_handle_t *hnd = static_cast<private_handle_t*> 90 (const_cast<native_handle_t*>(buffer)); 91 const size_t offset = hnd->base - m->framebuffer->base; 92 m->info.activate = FB_ACTIVATE_VBL; 93 m->info.yoffset = offset / m->finfo.line_length; 94 if (ioctl(m->framebuffer->fd, FBIOPUT_VSCREENINFO, &m->info) == -1) { 95 ALOGE("%s: FBIOPUT_VSCREENINFO for primary failed, str: %s", 96 __FUNCTION__, strerror(errno)); 97 return -errno; 98 } 99 return 0; 100 } 101 102 static int fb_compositionComplete(struct framebuffer_device_t* dev) 103 { 104 // TODO: Properly implement composition complete callback 105 glFinish(); 106 107 return 0; 108 } 109 110 int mapFrameBufferLocked(struct private_module_t* module) 111 { 112 // already initialized... 113 if (module->framebuffer) { 114 return 0; 115 } 116 char const * const device_template[] = { 117 "/dev/graphics/fb%u", 118 "/dev/fb%u", 119 0 }; 120 121 int fd = -1; 122 int i=0; 123 char name[64]; 124 char property[PROPERTY_VALUE_MAX]; 125 126 while ((fd==-1) && device_template[i]) { 127 snprintf(name, 64, device_template[i], 0); 128 fd = open(name, O_RDWR, 0); 129 i++; 130 } 131 if (fd < 0) 132 return -errno; 133 134 memset(&module->commit, 0, sizeof(struct mdp_display_commit)); 135 136 struct fb_fix_screeninfo finfo; 137 if (ioctl(fd, FBIOGET_FSCREENINFO, &finfo) == -1) 138 return -errno; 139 140 struct fb_var_screeninfo info; 141 if (ioctl(fd, FBIOGET_VSCREENINFO, &info) == -1) 142 return -errno; 143 144 info.reserved[0] = 0; 145 info.reserved[1] = 0; 146 info.reserved[2] = 0; 147 info.xoffset = 0; 148 info.yoffset = 0; 149 info.activate = FB_ACTIVATE_NOW; 150 151 /* Interpretation of offset for color fields: All offsets are from the 152 * right, inside a "pixel" value, which is exactly 'bits_per_pixel' wide 153 * (means: you can use the offset as right argument to <<). A pixel 154 * afterwards is a bit stream and is written to video memory as that 155 * unmodified. This implies big-endian byte order if bits_per_pixel is 156 * greater than 8. 157 */ 158 159 if(info.bits_per_pixel == 32) { 160 /* 161 * Explicitly request RGBA_8888 162 */ 163 info.bits_per_pixel = 32; 164 info.red.offset = 24; 165 info.red.length = 8; 166 info.green.offset = 16; 167 info.green.length = 8; 168 info.blue.offset = 8; 169 info.blue.length = 8; 170 info.transp.offset = 0; 171 info.transp.length = 8; 172 173 /* Note: the GL driver does not have a r=8 g=8 b=8 a=0 config, so if we 174 * do not use the MDP for composition (i.e. hw composition == 0), ask 175 * for RGBA instead of RGBX. */ 176 if (property_get("debug.sf.hw", property, NULL) > 0 && 177 atoi(property) == 0) 178 module->fbFormat = HAL_PIXEL_FORMAT_RGBX_8888; 179 else if(property_get("debug.composition.type", property, NULL) > 0 && 180 (strncmp(property, "mdp", 3) == 0)) 181 module->fbFormat = HAL_PIXEL_FORMAT_RGBX_8888; 182 else 183 module->fbFormat = HAL_PIXEL_FORMAT_RGBA_8888; 184 } else { 185 /* 186 * Explicitly request 5/6/5 187 */ 188 info.bits_per_pixel = 16; 189 info.red.offset = 11; 190 info.red.length = 5; 191 info.green.offset = 5; 192 info.green.length = 6; 193 info.blue.offset = 0; 194 info.blue.length = 5; 195 info.transp.offset = 0; 196 info.transp.length = 0; 197 module->fbFormat = HAL_PIXEL_FORMAT_RGB_565; 198 } 199 200 //adreno needs 4k aligned offsets. Max hole size is 4096-1 201 int size = roundUpToPageSize(info.yres * info.xres * 202 (info.bits_per_pixel/8)); 203 204 /* 205 * Request NUM_BUFFERS screens (at least 2 for page flipping) 206 */ 207 int numberOfBuffers = (int)(finfo.smem_len/size); 208 ALOGV("num supported framebuffers in kernel = %d", numberOfBuffers); 209 210 if (property_get("debug.gr.numframebuffers", property, NULL) > 0) { 211 int num = atoi(property); 212 if ((num >= NUM_FRAMEBUFFERS_MIN) && (num <= NUM_FRAMEBUFFERS_MAX)) { 213 numberOfBuffers = num; 214 } 215 } 216 if (numberOfBuffers > NUM_FRAMEBUFFERS_MAX) 217 numberOfBuffers = NUM_FRAMEBUFFERS_MAX; 218 219 ALOGV("We support %d buffers", numberOfBuffers); 220 221 //consider the included hole by 4k alignment 222 uint32_t line_length = (info.xres * info.bits_per_pixel / 8); 223 info.yres_virtual = (size * numberOfBuffers) / line_length; 224 225 uint32_t flags = PAGE_FLIP; 226 227 if (info.yres_virtual < ((size * 2) / line_length) ) { 228 // we need at least 2 for page-flipping 229 info.yres_virtual = size / line_length; 230 flags &= ~PAGE_FLIP; 231 ALOGW("page flipping not supported (yres_virtual=%d, requested=%d)", 232 info.yres_virtual, info.yres*2); 233 } 234 235 if (ioctl(fd, FBIOGET_VSCREENINFO, &info) == -1) 236 return -errno; 237 238 if (int(info.width) <= 0 || int(info.height) <= 0) { 239 // the driver doesn't return that information 240 // default to 160 dpi 241 info.width = ((info.xres * 25.4f)/160.0f + 0.5f); 242 info.height = ((info.yres * 25.4f)/160.0f + 0.5f); 243 } 244 245 float xdpi = (info.xres * 25.4f) / info.width; 246 float ydpi = (info.yres * 25.4f) / info.height; 247 #ifdef MSMFB_METADATA_GET 248 struct msmfb_metadata metadata; 249 memset(&metadata, 0 , sizeof(metadata)); 250 metadata.op = metadata_op_frame_rate; 251 if (ioctl(fd, MSMFB_METADATA_GET, &metadata) == -1) { 252 ALOGE("Error retrieving panel frame rate"); 253 return -errno; 254 } 255 float fps = metadata.data.panel_frame_rate; 256 #else 257 //XXX: Remove reserved field usage on all baselines 258 //The reserved[3] field is used to store FPS by the driver. 259 float fps = info.reserved[3] & 0xFF; 260 #endif 261 ALOGI("using (fd=%d)\n" 262 "id = %s\n" 263 "xres = %d px\n" 264 "yres = %d px\n" 265 "xres_virtual = %d px\n" 266 "yres_virtual = %d px\n" 267 "bpp = %d\n" 268 "r = %2u:%u\n" 269 "g = %2u:%u\n" 270 "b = %2u:%u\n", 271 fd, 272 finfo.id, 273 info.xres, 274 info.yres, 275 info.xres_virtual, 276 info.yres_virtual, 277 info.bits_per_pixel, 278 info.red.offset, info.red.length, 279 info.green.offset, info.green.length, 280 info.blue.offset, info.blue.length 281 ); 282 283 ALOGI("width = %d mm (%f dpi)\n" 284 "height = %d mm (%f dpi)\n" 285 "refresh rate = %.2f Hz\n", 286 info.width, xdpi, 287 info.height, ydpi, 288 fps 289 ); 290 291 292 if (ioctl(fd, FBIOGET_FSCREENINFO, &finfo) == -1) 293 return -errno; 294 295 if (finfo.smem_len <= 0) 296 return -errno; 297 298 module->flags = flags; 299 module->info = info; 300 module->finfo = finfo; 301 module->xdpi = xdpi; 302 module->ydpi = ydpi; 303 module->fps = fps; 304 module->swapInterval = 1; 305 306 CALC_INIT(); 307 308 /* 309 * map the framebuffer 310 */ 311 312 int err; 313 module->numBuffers = info.yres_virtual / info.yres; 314 module->bufferMask = 0; 315 //adreno needs page aligned offsets. Align the fbsize to pagesize. 316 size_t fbSize = roundUpToPageSize(finfo.line_length * info.yres)* 317 module->numBuffers; 318 module->framebuffer = new private_handle_t(fd, fbSize, 319 private_handle_t::PRIV_FLAGS_USES_ION, 320 BUFFER_TYPE_UI, 321 module->fbFormat, info.xres, info.yres); 322 void* vaddr = mmap(0, fbSize, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0); 323 if (vaddr == MAP_FAILED) { 324 ALOGE("Error mapping the framebuffer (%s)", strerror(errno)); 325 return -errno; 326 } 327 module->framebuffer->base = intptr_t(vaddr); 328 memset(vaddr, 0, fbSize); 329 module->currentOffset = 0; 330 //Enable vsync 331 int enable = 1; 332 ioctl(module->framebuffer->fd, MSMFB_OVERLAY_VSYNC_CTRL, 333 &enable); 334 return 0; 335 } 336 337 static int mapFrameBuffer(struct private_module_t* module) 338 { 339 pthread_mutex_lock(&module->lock); 340 int err = mapFrameBufferLocked(module); 341 pthread_mutex_unlock(&module->lock); 342 return err; 343 } 344 345 /*****************************************************************************/ 346 347 static int fb_close(struct hw_device_t *dev) 348 { 349 fb_context_t* ctx = (fb_context_t*)dev; 350 if (ctx) { 351 free(ctx); 352 } 353 return 0; 354 } 355 356 int fb_device_open(hw_module_t const* module, const char* name, 357 hw_device_t** device) 358 { 359 int status = -EINVAL; 360 if (!strcmp(name, GRALLOC_HARDWARE_FB0)) { 361 alloc_device_t* gralloc_device; 362 status = gralloc_open(module, &gralloc_device); 363 if (status < 0) 364 return status; 365 366 /* initialize our state here */ 367 fb_context_t *dev = (fb_context_t*)malloc(sizeof(*dev)); 368 memset(dev, 0, sizeof(*dev)); 369 370 /* initialize the procs */ 371 dev->device.common.tag = HARDWARE_DEVICE_TAG; 372 dev->device.common.version = 0; 373 dev->device.common.module = const_cast<hw_module_t*>(module); 374 dev->device.common.close = fb_close; 375 dev->device.setSwapInterval = fb_setSwapInterval; 376 dev->device.post = fb_post; 377 dev->device.setUpdateRect = 0; 378 dev->device.compositionComplete = fb_compositionComplete; 379 380 private_module_t* m = (private_module_t*)module; 381 status = mapFrameBuffer(m); 382 if (status >= 0) { 383 int stride = m->finfo.line_length / (m->info.bits_per_pixel >> 3); 384 const_cast<uint32_t&>(dev->device.flags) = 0; 385 const_cast<uint32_t&>(dev->device.width) = m->info.xres; 386 const_cast<uint32_t&>(dev->device.height) = m->info.yres; 387 const_cast<int&>(dev->device.stride) = stride; 388 const_cast<int&>(dev->device.format) = m->fbFormat; 389 const_cast<float&>(dev->device.xdpi) = m->xdpi; 390 const_cast<float&>(dev->device.ydpi) = m->ydpi; 391 const_cast<float&>(dev->device.fps) = m->fps; 392 const_cast<int&>(dev->device.minSwapInterval) = 393 PRIV_MIN_SWAP_INTERVAL; 394 const_cast<int&>(dev->device.maxSwapInterval) = 395 PRIV_MAX_SWAP_INTERVAL; 396 const_cast<int&>(dev->device.numFramebuffers) = m->numBuffers; 397 dev->device.setUpdateRect = 0; 398 399 *device = &dev->device.common; 400 } 401 402 // Close the gralloc module 403 gralloc_close(gralloc_device); 404 } 405 return status; 406 } 407
