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hardware_samsung/exynos5/hal/libgralloc_ump/framebuffer_device.cpp

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/*
* Copyright (C) 2010-2011 ARM Limited. All rights reserved.
*
* 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 <string.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <linux/fb.h>
#include <cutils/log.h>
#include <cutils/atomic.h>
#include <hardware/hardware.h>
#include <hardware/gralloc.h>
#include <GLES/gl.h>
#include "gralloc_priv.h"
#include "gralloc_helper.h"
#include "linux/fb.h"
/* numbers of buffers for page flipping */
#define NUM_BUFFERS 2
enum {
PAGE_FLIP = 0x00000001,
};
static int fb_set_swap_interval(struct framebuffer_device_t* dev, int interval)
{
if (interval < dev->minSwapInterval || interval > dev->maxSwapInterval)
return -EINVAL;
/* TODO: Currently not implemented */
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<private_handle_t const*>(buffer);
private_module_t* m = reinterpret_cast<private_module_t*>(dev->common.module);
if (m->currentBuffer) {
m->base.unlock(&m->base, m->currentBuffer);
m->currentBuffer = 0;
}
if (hnd->flags & private_handle_t::PRIV_FLAGS_FRAMEBUFFER) {
m->base.lock(&m->base, buffer, private_module_t::PRIV_USAGE_LOCKED_FOR_POST,
0, 0, m->info.xres, m->info.yres, NULL);
const size_t offset = hnd->base - m->framebuffer->base;
m->info.activate = FB_ACTIVATE_VBL;
m->info.yoffset = offset / m->finfo.line_length;
#ifdef STANDARD_LINUX_SCREEN
if (ioctl(m->framebuffer->fd, FBIOPAN_DISPLAY, &m->info) == -1) {
ALOGE("FBIOPAN_DISPLAY failed");
m->base.unlock(&m->base, buffer);
return 0;
}
/* wait for VSYNC */
int crtc = 0;
if (ioctl(m->framebuffer->fd, FBIO_WAITFORVSYNC, &crtc) < 0) {
ALOGE("FBIO_WAITFORVSYNC failed");
return 0;
}
#else
/* Standard Android way */
if (ioctl(m->framebuffer->fd, FBIOPUT_VSCREENINFO, &m->info) == -1) {
ALOGE("FBIOPUT_VSCREENINFO failed");
m->base.unlock(&m->base, buffer);
return -errno;
}
#endif
m->currentBuffer = buffer;
} else {
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 init_frame_buffer_locked(struct private_module_t* module)
{
if (module->framebuffer)
return 0; /* Nothing to do, already initialized */
char const * const device_template[] = {
"/dev/graphics/fb%u",
"/dev/fb%u",
NULL
};
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) {
ALOGE("/dev/graphics/fb, /dev/fb Open fail");
return -errno;
}
struct fb_fix_screeninfo finfo;
if (ioctl(fd, FBIOGET_FSCREENINFO, &finfo) == -1) {
ALOGE("Fail to get FB Screen Info");
return -errno;
}
struct fb_var_screeninfo info;
if (ioctl(fd, FBIOGET_VSCREENINFO, &info) == -1) {
ALOGE("First, Fail to get FB VScreen Info");
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;
#ifdef GRALLOC_16_BITS
/*
* Explicitly request 5/6/5
*/
info.bits_per_pixel = 16;
info.red.offset = 11;
info.red.length = 5;
info.green.offset = 5;
info.green.length = 6;
info.blue.offset = 0;
info.blue.length = 5;
info.transp.offset = 0;
info.transp.length = 0;
#else
/*
* Explicitly request 8/8/8
*/
info.bits_per_pixel = 32;
info.red.offset = 16;
info.red.length = 8;
info.green.offset = 8;
info.green.length = 8;
info.blue.offset = 0;
info.blue.length = 8;
info.transp.offset = 0;
info.transp.length = 0;
#endif
/*
* Request NUM_BUFFERS screens (at lest 2 for page flipping)
*/
info.yres_virtual = info.yres * NUM_BUFFERS;
uint32_t flags = PAGE_FLIP;
if (ioctl(fd, FBIOPUT_VSCREENINFO, &info) == -1) {
info.yres_virtual = info.yres;
flags &= ~PAGE_FLIP;
ALOGW("FBIOPUT_VSCREENINFO failed, page flipping not supported");
}
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) {
ALOGE("Second, Fail to get FB VScreen Info");
return -errno;
}
int refreshRate = 1000000000000000LLU /
(
uint64_t( info.upper_margin + info.lower_margin + info.yres )
* ( info.left_margin + info.right_margin + info.xres )
* info.pixclock
);
if (refreshRate == 0)
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) {
ALOGE("Fail to get FScreen Info");
return -errno;
}
if (finfo.smem_len <= 0) {
ALOGE("Invalid Value : finfo.smem_len");
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 = round_up_to_page_size(finfo.line_length * info.yres_virtual);
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;
}
memset(vaddr, 0, fbSize);
/* Create a "fake" buffer object for the entire frame buffer memory,
* and store it in the module */
module->framebuffer = new private_handle_t(private_handle_t::PRIV_FLAGS_FRAMEBUFFER,
fbSize, intptr_t(vaddr),
0, dup(fd), 0);
module->numBuffers = info.yres_virtual / info.yres;
module->bufferMask = 0;
return 0;
}
static int init_frame_buffer(struct private_module_t* module)
{
pthread_mutex_lock(&module->lock);
int err = init_frame_buffer_locked(module);
pthread_mutex_unlock(&module->lock);
return err;
}
static int fb_close(struct hw_device_t *device)
{
framebuffer_device_t* dev = reinterpret_cast<framebuffer_device_t*>(device);
if (dev) {
ump_close();
delete dev;
}
return 0;
}
int compositionComplete(struct framebuffer_device_t* dev)
{
/* By doing a Finish here we force the GL driver to start rendering
all the drawcalls up to this point, and to wait for the rendering to be complete.*/
/* It move to HWComposit Module */
/* The rendering of the backbuffer is now completed.
When SurfaceFlinger later does a call to eglSwapBuffer(), the swap will be done
synchronously in the same thread, and not asynchronoulsy in a background thread later.
The SurfaceFlinger requires this behaviour since it releases the lock on all the
SourceBuffers (Layers) after the compositionComplete() function returns.
However this "bad" behaviour by SurfaceFlinger should not affect performance,
since the Applications that render the SourceBuffers (Layers) still get the
full renderpipeline using asynchronouls rendering. So they perform at maximum speed,
and because of their complexity compared to the Surface flinger jobs, the Surface flinger
is normally faster even if it does everyhing synchronous and serial.
*/
return 0;
}
int framebuffer_device_open(hw_module_t const* module, const char* name, hw_device_t** device)
{
int status = -EINVAL;
alloc_device_t* gralloc_device;
status = gralloc_open(module, &gralloc_device);
if (status < 0) {
ALOGE("Fail to Open gralloc device");
return status;
}
private_module_t* m = (private_module_t*)module;
status = init_frame_buffer(m);
if (status < 0) {
ALOGE("Fail to init framebuffer");
gralloc_close(gralloc_device);
return status;
}
/* initialize our state here */
framebuffer_device_t *dev = new framebuffer_device_t;
memset(dev, 0, sizeof(*dev));
/* initialize the procs */
dev->common.tag = HARDWARE_DEVICE_TAG;
dev->common.version = 0;
dev->common.module = const_cast<hw_module_t*>(module);
dev->common.close = fb_close;
dev->setSwapInterval = fb_set_swap_interval;
dev->post = fb_post;
dev->setUpdateRect = 0;
dev->compositionComplete = &compositionComplete;
int stride = m->finfo.line_length / (m->info.bits_per_pixel >> 3);
const_cast<uint32_t&>(dev->flags) = 0;
const_cast<uint32_t&>(dev->width) = m->info.xres;
const_cast<uint32_t&>(dev->height) = m->info.yres;
const_cast<int&>(dev->stride) = stride;
#ifdef GRALLOC_16_BITS
const_cast<int&>(dev->format) = HAL_PIXEL_FORMAT_RGB_565;
#else
const_cast<int&>(dev->format) = HAL_PIXEL_FORMAT_BGRA_8888;
#endif
const_cast<float&>(dev->xdpi) = m->xdpi;
const_cast<float&>(dev->ydpi) = m->ydpi;
const_cast<float&>(dev->fps) = m->fps;
const_cast<int&>(dev->minSwapInterval) = 1;
const_cast<int&>(dev->maxSwapInterval) = 1;
*device = &dev->common;
status = 0;
return status;
}