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