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394 lines
12 KiB
394 lines
12 KiB
/*
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* Copyright (C) 2010-2011 ARM Limited. All rights reserved.
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*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <string.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <linux/fb.h>
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#include <cutils/log.h>
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#include <cutils/atomic.h>
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#include <hardware/hardware.h>
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#include <hardware/gralloc.h>
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#include <GLES/gl.h>
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#include "gralloc_priv.h"
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#include "gralloc_helper.h"
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#include "linux/fb.h"
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/* numbers of buffers for page flipping */
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#define NUM_BUFFERS 2
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enum {
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PAGE_FLIP = 0x00000001,
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};
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static int fb_set_swap_interval(struct framebuffer_device_t* dev, int interval)
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{
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if (interval < dev->minSwapInterval || interval > dev->maxSwapInterval)
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return -EINVAL;
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/* TODO: Currently not implemented */
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return 0;
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}
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static int fb_post(struct framebuffer_device_t* dev, buffer_handle_t buffer)
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{
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if (private_handle_t::validate(buffer) < 0)
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return -EINVAL;
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private_handle_t const* hnd = reinterpret_cast<private_handle_t const*>(buffer);
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private_module_t* m = reinterpret_cast<private_module_t*>(dev->common.module);
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if (m->currentBuffer) {
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m->base.unlock(&m->base, m->currentBuffer);
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m->currentBuffer = 0;
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}
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if (hnd->flags & private_handle_t::PRIV_FLAGS_FRAMEBUFFER) {
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m->base.lock(&m->base, buffer, private_module_t::PRIV_USAGE_LOCKED_FOR_POST,
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0, 0, m->info.xres, m->info.yres, NULL);
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const size_t offset = hnd->base - m->framebuffer->base;
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m->info.activate = FB_ACTIVATE_VBL;
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m->info.yoffset = offset / m->finfo.line_length;
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#ifdef STANDARD_LINUX_SCREEN
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if (ioctl(m->framebuffer->fd, FBIOPAN_DISPLAY, &m->info) == -1) {
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LOGE("FBIOPAN_DISPLAY failed");
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m->base.unlock(&m->base, buffer);
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return 0;
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}
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/* wait for VSYNC */
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int crtc = 0;
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if (ioctl(m->framebuffer->fd, FBIO_WAITFORVSYNC, &crtc) < 0) {
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LOGE("FBIO_WAITFORVSYNC failed");
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return 0;
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}
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#else
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/* Standard Android way */
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if (ioctl(m->framebuffer->fd, FBIOPUT_VSCREENINFO, &m->info) == -1) {
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LOGE("FBIOPUT_VSCREENINFO failed");
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m->base.unlock(&m->base, buffer);
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return -errno;
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}
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#endif
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m->currentBuffer = buffer;
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} else {
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void* fb_vaddr;
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void* buffer_vaddr;
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m->base.lock(&m->base, m->framebuffer, GRALLOC_USAGE_SW_WRITE_RARELY,
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0, 0, m->info.xres, m->info.yres, &fb_vaddr);
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m->base.lock(&m->base, buffer, GRALLOC_USAGE_SW_READ_RARELY,
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0, 0, m->info.xres, m->info.yres, &buffer_vaddr);
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memcpy(fb_vaddr, buffer_vaddr, m->finfo.line_length * m->info.yres);
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m->base.unlock(&m->base, buffer);
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m->base.unlock(&m->base, m->framebuffer);
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}
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return 0;
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}
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int init_frame_buffer_locked(struct private_module_t* module)
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{
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if (module->framebuffer)
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return 0; /* Nothing to do, already initialized */
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char const * const device_template[] = {
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"/dev/graphics/fb%u",
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"/dev/fb%u",
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NULL
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};
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int fd = -1;
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int i = 0;
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char name[64];
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while ((fd == -1) && device_template[i]) {
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snprintf(name, 64, device_template[i], 0);
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fd = open(name, O_RDWR, 0);
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i++;
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}
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if (fd < 0) {
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LOGE("/dev/graphics/fb, /dev/fb Open fail");
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return -errno;
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}
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struct fb_fix_screeninfo finfo;
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if (ioctl(fd, FBIOGET_FSCREENINFO, &finfo) == -1) {
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LOGE("Fail to get FB Screen Info");
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return -errno;
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}
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struct fb_var_screeninfo info;
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if (ioctl(fd, FBIOGET_VSCREENINFO, &info) == -1) {
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LOGE("First, Fail to get FB VScreen Info");
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return -errno;
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}
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info.reserved[0] = 0;
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info.reserved[1] = 0;
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info.reserved[2] = 0;
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info.xoffset = 0;
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info.yoffset = 0;
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info.activate = FB_ACTIVATE_NOW;
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#ifdef GRALLOC_16_BITS
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/*
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* Explicitly request 5/6/5
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*/
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info.bits_per_pixel = 16;
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info.red.offset = 11;
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info.red.length = 5;
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info.green.offset = 5;
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info.green.length = 6;
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info.blue.offset = 0;
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info.blue.length = 5;
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info.transp.offset = 0;
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info.transp.length = 0;
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#else
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/*
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* Explicitly request 8/8/8
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*/
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info.bits_per_pixel = 32;
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info.red.offset = 16;
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info.red.length = 8;
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info.green.offset = 8;
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info.green.length = 8;
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info.blue.offset = 0;
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info.blue.length = 8;
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info.transp.offset = 0;
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info.transp.length = 0;
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#endif
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/*
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* Request NUM_BUFFERS screens (at lest 2 for page flipping)
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*/
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info.yres_virtual = info.yres * NUM_BUFFERS;
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uint32_t flags = PAGE_FLIP;
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if (ioctl(fd, FBIOPUT_VSCREENINFO, &info) == -1) {
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info.yres_virtual = info.yres;
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flags &= ~PAGE_FLIP;
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LOGW("FBIOPUT_VSCREENINFO failed, page flipping not supported");
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}
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if (info.yres_virtual < info.yres * 2) {
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/* we need at least 2 for page-flipping */
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info.yres_virtual = info.yres;
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flags &= ~PAGE_FLIP;
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LOGW("page flipping not supported (yres_virtual=%d, requested=%d)",
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info.yres_virtual, info.yres*2);
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}
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if (ioctl(fd, FBIOGET_VSCREENINFO, &info) == -1) {
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LOGE("Second, Fail to get FB VScreen Info");
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return -errno;
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}
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int refreshRate = 1000000000000000LLU /
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(
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uint64_t( info.upper_margin + info.lower_margin + info.yres )
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* ( info.left_margin + info.right_margin + info.xres )
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* info.pixclock
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);
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if (refreshRate == 0)
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refreshRate = 60*1000; /* 60 Hz */
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if (int(info.width) <= 0 || int(info.height) <= 0) {
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/* the driver doesn't return that information default to 160 dpi */
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info.width = ((info.xres * 25.4f) / 160.0f + 0.5f);
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info.height = ((info.yres * 25.4f) / 160.0f + 0.5f);
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}
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float xdpi = (info.xres * 25.4f) / info.width;
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float ydpi = (info.yres * 25.4f) / info.height;
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float fps = refreshRate / 1000.0f;
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LOGI("using (fd=%d)\n"
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"id = %s\n"
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"xres = %d px\n"
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"yres = %d px\n"
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"xres_virtual = %d px\n"
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"yres_virtual = %d px\n"
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"bpp = %d\n"
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"r = %2u:%u\n"
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"g = %2u:%u\n"
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"b = %2u:%u\n",
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fd,
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finfo.id,
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info.xres,
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info.yres,
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info.xres_virtual,
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info.yres_virtual,
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info.bits_per_pixel,
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info.red.offset, info.red.length,
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info.green.offset, info.green.length,
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info.blue.offset, info.blue.length);
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LOGI("width = %d mm (%f dpi)\n"
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"height = %d mm (%f dpi)\n"
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"refresh rate = %.2f Hz\n",
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info.width, xdpi,
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info.height, ydpi,
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fps);
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if (ioctl(fd, FBIOGET_FSCREENINFO, &finfo) == -1) {
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LOGE("Fail to get FScreen Info");
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return -errno;
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}
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if (finfo.smem_len <= 0) {
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LOGE("Invalid Value : finfo.smem_len");
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return -errno;
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}
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module->flags = flags;
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module->info = info;
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module->finfo = finfo;
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module->xdpi = xdpi;
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module->ydpi = ydpi;
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module->fps = fps;
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/*
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* map the framebuffer
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*/
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size_t fbSize = round_up_to_page_size(finfo.line_length * info.yres_virtual);
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void* vaddr = mmap(0, fbSize, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
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if (vaddr == MAP_FAILED) {
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LOGE("Error mapping the framebuffer (%s)", strerror(errno));
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return -errno;
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}
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memset(vaddr, 0, fbSize);
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/* Create a "fake" buffer object for the entire frame buffer memory,
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* and store it in the module */
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module->framebuffer = new private_handle_t(private_handle_t::PRIV_FLAGS_FRAMEBUFFER,
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fbSize, intptr_t(vaddr),
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0, dup(fd), 0);
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module->numBuffers = info.yres_virtual / info.yres;
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module->bufferMask = 0;
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return 0;
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}
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static int init_frame_buffer(struct private_module_t* module)
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{
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pthread_mutex_lock(&module->lock);
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int err = init_frame_buffer_locked(module);
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pthread_mutex_unlock(&module->lock);
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return err;
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}
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static int fb_close(struct hw_device_t *device)
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{
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framebuffer_device_t* dev = reinterpret_cast<framebuffer_device_t*>(device);
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if (dev) {
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ump_close();
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delete dev;
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}
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return 0;
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}
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int compositionComplete(struct framebuffer_device_t* dev)
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{
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/* By doing a Finish here we force the GL driver to start rendering
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all the drawcalls up to this point, and to wait for the rendering to be complete.*/
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/* It move to HWComposit Module */
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/* The rendering of the backbuffer is now completed.
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When SurfaceFlinger later does a call to eglSwapBuffer(), the swap will be done
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synchronously in the same thread, and not asynchronoulsy in a background thread later.
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The SurfaceFlinger requires this behaviour since it releases the lock on all the
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SourceBuffers (Layers) after the compositionComplete() function returns.
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However this "bad" behaviour by SurfaceFlinger should not affect performance,
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since the Applications that render the SourceBuffers (Layers) still get the
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full renderpipeline using asynchronouls rendering. So they perform at maximum speed,
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and because of their complexity compared to the Surface flinger jobs, the Surface flinger
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is normally faster even if it does everyhing synchronous and serial.
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*/
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return 0;
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}
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int framebuffer_device_open(hw_module_t const* module, const char* name, hw_device_t** device)
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{
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int status = -EINVAL;
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alloc_device_t* gralloc_device;
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status = gralloc_open(module, &gralloc_device);
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if (status < 0) {
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LOGE("Fail to Open gralloc device");
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return status;
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}
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private_module_t* m = (private_module_t*)module;
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status = init_frame_buffer(m);
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if (status < 0) {
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LOGE("Fail to init framebuffer");
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gralloc_close(gralloc_device);
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return status;
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}
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/* initialize our state here */
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framebuffer_device_t *dev = new framebuffer_device_t;
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memset(dev, 0, sizeof(*dev));
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/* initialize the procs */
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dev->common.tag = HARDWARE_DEVICE_TAG;
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dev->common.version = 0;
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dev->common.module = const_cast<hw_module_t*>(module);
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dev->common.close = fb_close;
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dev->setSwapInterval = fb_set_swap_interval;
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dev->post = fb_post;
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dev->setUpdateRect = 0;
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dev->compositionComplete = &compositionComplete;
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int stride = m->finfo.line_length / (m->info.bits_per_pixel >> 3);
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const_cast<uint32_t&>(dev->flags) = 0;
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const_cast<uint32_t&>(dev->width) = m->info.xres;
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const_cast<uint32_t&>(dev->height) = m->info.yres;
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const_cast<int&>(dev->stride) = stride;
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#ifdef GRALLOC_16_BITS
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const_cast<int&>(dev->format) = HAL_PIXEL_FORMAT_RGB_565;
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#else
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const_cast<int&>(dev->format) = HAL_PIXEL_FORMAT_BGRA_8888;
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#endif
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const_cast<float&>(dev->xdpi) = m->xdpi;
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const_cast<float&>(dev->ydpi) = m->ydpi;
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const_cast<float&>(dev->fps) = m->fps;
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const_cast<int&>(dev->minSwapInterval) = 1;
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const_cast<int&>(dev->maxSwapInterval) = 1;
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*device = &dev->common;
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status = 0;
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return status;
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}
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