423 lines
12 KiB
C++
423 lines
12 KiB
C++
/*
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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 <sys/mman.h>
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#include <dlfcn.h>
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#include <cutils/ashmem.h>
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#include <cutils/log.h>
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#include <hardware/hardware.h>
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#include <hardware/gralloc.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <cutils/log.h>
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#include <cutils/atomic.h>
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#if HAVE_ANDROID_OS
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#include <linux/fb.h>
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#endif
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#include "gralloc_priv.h"
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#include <linux/msm_mdp.h>
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#include <sys/ioctl.h>
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/*****************************************************************************/
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// should be a build option
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#define SUPPORTS_UPDATE_ON_DEMAND 1
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#define NUM_BUFFERS 2
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enum {
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PAGE_FLIP = 0x00000001,
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LOCKED = 0x00000002
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};
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struct fb_context_t {
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framebuffer_device_t device;
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};
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/*****************************************************************************/
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void
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msm_copy_buffer(buffer_handle_t handle, int fd, int width, int height,
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int x, int y, int w, int h);
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static int fb_setSwapInterval(struct framebuffer_device_t* dev,
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int interval)
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{
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fb_context_t* ctx = (fb_context_t*)dev;
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if (interval < dev->minSwapInterval || interval > dev->maxSwapInterval)
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return -EINVAL;
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// FIXME: implement fb_setSwapInterval
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return 0;
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}
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static int fb_setUpdateRect(struct framebuffer_device_t* dev,
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int l, int t, int w, int h)
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{
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if (((w|h) <= 0) || ((l|t)<0))
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return -EINVAL;
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fb_context_t* ctx = (fb_context_t*)dev;
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private_module_t* m = reinterpret_cast<private_module_t*>(
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dev->common.module);
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m->info.reserved[0] = 0x54445055; // "UPDT";
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m->info.reserved[1] = (uint16_t)l | ((uint32_t)t << 16);
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m->info.reserved[2] = (uint16_t)(l+w) | ((uint32_t)(t+h) << 16);
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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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fb_context_t* ctx = (fb_context_t*)dev;
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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*>(
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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,
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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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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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m->currentBuffer = buffer;
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} else {
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// If we can't do the page_flip, just copy the buffer to the front
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// FIXME: use copybit HAL instead of memcpy
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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,
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GRALLOC_USAGE_SW_WRITE_RARELY,
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0, 0, m->info.xres, m->info.yres,
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&fb_vaddr);
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m->base.lock(&m->base, buffer,
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GRALLOC_USAGE_SW_READ_RARELY,
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0, 0, m->info.xres, m->info.yres,
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&buffer_vaddr);
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//memcpy(fb_vaddr, buffer_vaddr, m->finfo.line_length * m->info.yres);
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msm_copy_buffer(m->framebuffer, m->framebuffer->fd,
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m->info.xres, m->info.yres,
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m->info.xoffset, m->info.yoffset,
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m->info.width, m->info.height);
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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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/*****************************************************************************/
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int mapFrameBufferLocked(struct private_module_t* module)
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{
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// already initialized...
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if (module->framebuffer) {
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return 0;
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}
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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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0 };
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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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return -errno;
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struct fb_fix_screeninfo finfo;
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if (ioctl(fd, FBIOGET_FSCREENINFO, &finfo) == -1)
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return -errno;
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struct fb_var_screeninfo info;
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if (ioctl(fd, FBIOGET_VSCREENINFO, &info) == -1)
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return -errno;
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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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/*
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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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/*
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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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return -errno;
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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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// bleagh, bad info from the driver
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refreshRate = 60*1000; // 60 Hz
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}
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if (int(info.width) <= 0 || int(info.height) <= 0) {
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// the driver doesn't return that information
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// 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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);
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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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);
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if (ioctl(fd, FBIOGET_FSCREENINFO, &finfo) == -1)
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return -errno;
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if (finfo.smem_len <= 0)
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return -errno;
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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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int err;
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size_t fbSize = roundUpToPageSize(finfo.line_length * info.yres_virtual);
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module->framebuffer = new private_handle_t(dup(fd), fbSize,
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private_handle_t::PRIV_FLAGS_USES_PMEM, BUFFER_TYPE_FB);
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module->numBuffers = info.yres_virtual / info.yres;
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module->bufferMask = 0;
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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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module->framebuffer->base = intptr_t(vaddr);
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memset(vaddr, 0, fbSize);
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return 0;
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}
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static int mapFrameBuffer(struct private_module_t* module)
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{
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pthread_mutex_lock(&module->lock);
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int err = mapFrameBufferLocked(module);
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pthread_mutex_unlock(&module->lock);
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return err;
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}
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/*****************************************************************************/
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static int fb_close(struct hw_device_t *dev)
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{
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fb_context_t* ctx = (fb_context_t*)dev;
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if (ctx) {
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free(ctx);
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}
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return 0;
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}
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int fb_device_open(hw_module_t const* module, const char* name,
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hw_device_t** device)
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{
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int status = -EINVAL;
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if (!strcmp(name, GRALLOC_HARDWARE_FB0)) {
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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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return status;
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/* initialize our state here */
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fb_context_t *dev = (fb_context_t*)malloc(sizeof(*dev));
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memset(dev, 0, sizeof(*dev));
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/* initialize the procs */
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dev->device.common.tag = HARDWARE_DEVICE_TAG;
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dev->device.common.version = 0;
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dev->device.common.module = const_cast<hw_module_t*>(module);
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dev->device.common.close = fb_close;
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dev->device.setSwapInterval = fb_setSwapInterval;
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#if SUPPORTS_UPDATE_ON_DEMAND
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dev->device.setUpdateRect = fb_setUpdateRect;
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#endif
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dev->device.post = fb_post;
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private_module_t* m = (private_module_t*)module;
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status = mapFrameBuffer(m);
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if (status >= 0) {
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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->device.flags) = 0;
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const_cast<uint32_t&>(dev->device.width) = m->info.xres;
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const_cast<uint32_t&>(dev->device.height) = m->info.yres;
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const_cast<int&>(dev->device.stride) = stride;
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const_cast<int&>(dev->device.format) = HAL_PIXEL_FORMAT_RGB_565;
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const_cast<float&>(dev->device.xdpi) = m->xdpi;
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const_cast<float&>(dev->device.ydpi) = m->ydpi;
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const_cast<float&>(dev->device.fps) = m->fps;
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const_cast<int&>(dev->device.minSwapInterval) = 1;
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const_cast<int&>(dev->device.maxSwapInterval) = 1;
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*device = &dev->device.common;
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}
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}
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return status;
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}
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/* Copy a pmem buffer to the framebuffer */
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void
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msm_copy_buffer(buffer_handle_t handle, int fd, int width, int height,
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int x, int y, int w, int h)
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{
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struct {
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unsigned int count;
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mdp_blit_req req;
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} blit;
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private_handle_t *priv = (private_handle_t*) handle;
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memset(&blit, 0, sizeof(blit));
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blit.count = 1;
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blit.req.flags = 0;
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blit.req.alpha = 0xff;
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blit.req.transp_mask = 0xffffffff;
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blit.req.src.width = width;
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blit.req.src.height = height;
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blit.req.src.offset = 0;
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blit.req.src.memory_id = priv->fd;
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blit.req.dst.width = width;
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blit.req.dst.height = height;
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blit.req.dst.offset = 0;
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blit.req.dst.memory_id = fd;
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blit.req.dst.format = MDP_RGB_565;
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blit.req.src_rect.x = blit.req.dst_rect.x = x;
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blit.req.src_rect.y = blit.req.dst_rect.y = y;
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blit.req.src_rect.w = blit.req.dst_rect.w = w;
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blit.req.src_rect.h = blit.req.dst_rect.h = h;
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if (ioctl(fd, MSMFB_BLIT, &blit))
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LOGE("MSMFB_BLIT failed = %d", -errno);
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}
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