/* * Copyright (C) 2008 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include #include #include #include #include #include #include #include #include #include #include #include #ifdef __ANDROID__ #include #endif #include "gralloc_priv.h" #include "gr.h" /*****************************************************************************/ // Set TARGET_USE_PAN_DISPLAY to true at compile time if the // board uses FBIOPAN_DISPLAY to setup page flipping, otherwise // default ioctl to do page-flipping is FBIOPUT_VSCREENINFO. #ifndef USE_PAN_DISPLAY #define USE_PAN_DISPLAY 0 #endif // numbers of buffers for page flipping #define NUM_BUFFERS 2 enum { PAGE_FLIP = 0x00000001, LOCKED = 0x00000002 }; struct fb_context_t { framebuffer_device_t device; }; /*****************************************************************************/ static int fb_setSwapInterval(struct framebuffer_device_t* dev, int interval) { if (interval < dev->minSwapInterval || interval > dev->maxSwapInterval) return -EINVAL; // FIXME: implement fb_setSwapInterval return 0; } static int fb_post(struct framebuffer_device_t* dev, buffer_handle_t buffer) { if (private_handle_t::validate(buffer) < 0) return -EINVAL; private_handle_t const* hnd = reinterpret_cast(buffer); private_module_t* m = reinterpret_cast( dev->common.module); if (hnd->flags & private_handle_t::PRIV_FLAGS_FRAMEBUFFER) { const size_t offset = hnd->base - m->framebuffer->base; m->info.activate = FB_ACTIVATE_VBL; m->info.yoffset = offset / m->finfo.line_length; if (ioctl(m->framebuffer->fd, FBIOPUT_VSCREENINFO, &m->info) == -1) { ALOGE("FBIOPUT_VSCREENINFO failed"); m->base.unlock(&m->base, buffer); return -errno; } m->currentBuffer = buffer; } else { // If we can't do the page_flip, just copy the buffer to the front // FIXME: use copybit HAL instead of memcpy void* fb_vaddr; void* buffer_vaddr; m->base.lock(&m->base, m->framebuffer, GRALLOC_USAGE_SW_WRITE_RARELY, 0, 0, m->info.xres, m->info.yres, &fb_vaddr); m->base.lock(&m->base, buffer, GRALLOC_USAGE_SW_READ_RARELY, 0, 0, m->info.xres, m->info.yres, &buffer_vaddr); memcpy(fb_vaddr, buffer_vaddr, m->finfo.line_length * m->info.yres); m->base.unlock(&m->base, buffer); m->base.unlock(&m->base, m->framebuffer); } return 0; } /*****************************************************************************/ int mapFrameBufferLocked(struct private_module_t* module) { // already initialized... if (module->framebuffer) { return 0; } char const * const device_template[] = { "/dev/graphics/fb%u", "/dev/fb%u", 0 }; int fd = -1; int i=0; char name[64]; while ((fd==-1) && device_template[i]) { snprintf(name, 64, device_template[i], 0); fd = open(name, O_RDWR, 0); i++; } if (fd < 0) return -errno; struct fb_fix_screeninfo finfo; if (ioctl(fd, FBIOGET_FSCREENINFO, &finfo) == -1) return -errno; struct fb_var_screeninfo info; if (ioctl(fd, FBIOGET_VSCREENINFO, &info) == -1) return -errno; info.reserved[0] = 0; info.reserved[1] = 0; info.reserved[2] = 0; info.xoffset = 0; info.yoffset = 0; info.activate = FB_ACTIVATE_NOW; /* * Request NUM_BUFFERS screens (at lest 2 for page flipping) */ info.yres_virtual = info.yres * NUM_BUFFERS; uint32_t flags = PAGE_FLIP; #if USE_PAN_DISPLAY if (ioctl(fd, FBIOPAN_DISPLAY, &info) == -1) { ALOGW("FBIOPAN_DISPLAY failed, page flipping not supported"); #else if (ioctl(fd, FBIOPUT_VSCREENINFO, &info) == -1) { ALOGW("FBIOPUT_VSCREENINFO failed, page flipping not supported"); #endif info.yres_virtual = info.yres; flags &= ~PAGE_FLIP; } if (info.yres_virtual < info.yres * 2) { // we need at least 2 for page-flipping info.yres_virtual = info.yres; flags &= ~PAGE_FLIP; ALOGW("page flipping not supported (yres_virtual=%d, requested=%d)", info.yres_virtual, info.yres*2); } if (ioctl(fd, FBIOGET_VSCREENINFO, &info) == -1) return -errno; uint64_t refreshQuotient = ( uint64_t( info.upper_margin + info.lower_margin + info.yres ) * ( info.left_margin + info.right_margin + info.xres ) * info.pixclock ); /* Beware, info.pixclock might be 0 under emulation, so avoid a * division-by-0 here (SIGFPE on ARM) */ int refreshRate = refreshQuotient > 0 ? (int)(1000000000000000LLU / refreshQuotient) : 0; if (refreshRate == 0) { // bleagh, bad info from the driver refreshRate = 60*1000; // 60 Hz } if (int(info.width) <= 0 || int(info.height) <= 0) { // the driver doesn't return that information // default to 160 dpi info.width = ((info.xres * 25.4f)/160.0f + 0.5f); info.height = ((info.yres * 25.4f)/160.0f + 0.5f); } float xdpi = (info.xres * 25.4f) / info.width; float ydpi = (info.yres * 25.4f) / info.height; float fps = refreshRate / 1000.0f; ALOGI( "using (fd=%d)\n" "id = %s\n" "xres = %d px\n" "yres = %d px\n" "xres_virtual = %d px\n" "yres_virtual = %d px\n" "bpp = %d\n" "r = %2u:%u\n" "g = %2u:%u\n" "b = %2u:%u\n", fd, finfo.id, info.xres, info.yres, info.xres_virtual, info.yres_virtual, info.bits_per_pixel, info.red.offset, info.red.length, info.green.offset, info.green.length, info.blue.offset, info.blue.length ); ALOGI( "width = %d mm (%f dpi)\n" "height = %d mm (%f dpi)\n" "refresh rate = %.2f Hz\n", info.width, xdpi, info.height, ydpi, fps ); if (ioctl(fd, FBIOGET_FSCREENINFO, &finfo) == -1) return -errno; if (finfo.smem_len <= 0) return -errno; module->flags = flags; module->info = info; module->finfo = finfo; module->xdpi = xdpi; module->ydpi = ydpi; module->fps = fps; /* * map the framebuffer */ size_t fbSize = roundUpToPageSize(finfo.line_length * info.yres_virtual); module->framebuffer = new private_handle_t(dup(fd), fbSize, 0); module->numBuffers = info.yres_virtual / info.yres; module->bufferMask = 0; void* vaddr = mmap(0, fbSize, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0); if (vaddr == MAP_FAILED) { ALOGE("Error mapping the framebuffer (%s)", strerror(errno)); return -errno; } module->framebuffer->base = intptr_t(vaddr); memset(vaddr, 0, fbSize); return 0; } static int mapFrameBuffer(struct private_module_t* module) { pthread_mutex_lock(&module->lock); int err = mapFrameBufferLocked(module); pthread_mutex_unlock(&module->lock); return err; } /*****************************************************************************/ static int fb_close(struct hw_device_t *dev) { fb_context_t* ctx = (fb_context_t*)dev; if (ctx) { free(ctx); } return 0; } int fb_device_open(hw_module_t const* module, const char* name, hw_device_t** device) { int status = -EINVAL; if (!strcmp(name, GRALLOC_HARDWARE_FB0)) { /* initialize our state here */ fb_context_t *dev = (fb_context_t*)malloc(sizeof(*dev)); memset(dev, 0, sizeof(*dev)); /* initialize the procs */ dev->device.common.tag = HARDWARE_DEVICE_TAG; dev->device.common.version = 0; dev->device.common.module = const_cast(module); dev->device.common.close = fb_close; dev->device.setSwapInterval = fb_setSwapInterval; dev->device.post = fb_post; dev->device.setUpdateRect = 0; private_module_t* m = (private_module_t*)module; status = mapFrameBuffer(m); if (status >= 0) { int stride = m->finfo.line_length / (m->info.bits_per_pixel >> 3); int format = (m->info.bits_per_pixel == 32) ? (m->info.red.offset ? HAL_PIXEL_FORMAT_BGRA_8888 : HAL_PIXEL_FORMAT_RGBX_8888) : HAL_PIXEL_FORMAT_RGB_565; const_cast(dev->device.flags) = 0; const_cast(dev->device.width) = m->info.xres; const_cast(dev->device.height) = m->info.yres; const_cast(dev->device.stride) = stride; const_cast(dev->device.format) = format; const_cast(dev->device.xdpi) = m->xdpi; const_cast(dev->device.ydpi) = m->ydpi; const_cast(dev->device.fps) = m->fps; const_cast(dev->device.minSwapInterval) = 1; const_cast(dev->device.maxSwapInterval) = 1; *device = &dev->device.common; } else { free(dev); } } return status; }