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/*
* Copyright (C) 2008 The Android Open Source Project
* Copyright (c) 2010-2012 The Linux Foundation. All rights reserved.
*
* 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 <sys/mman.h>
#include <cutils/log.h>
#include <cutils/properties.h>
#include <dlfcn.h>
#include <hardware/hardware.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <string.h>
#include <stdlib.h>
#include <pthread.h>
#include <cutils/atomic.h>
#include <linux/fb.h>
#include <linux/msm_mdp.h>
#include <GLES/gl.h>
#include "gralloc_priv.h"
#include "fb_priv.h"
#include "gr.h"
#include <genlock.h>
#include <cutils/properties.h>
#include <profiler.h>
#define EVEN_OUT(x) if (x & 0x0001) {x--;}
/** min of int a, b */
static inline int min(int a, int b) {
return (a<b) ? a : b;
}
/** max of int a, b */
static inline int max(int a, int b) {
return (a>b) ? a : b;
}
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)
{
//XXX: Get the value here and implement along with
//single vsync in HWC
char pval[PROPERTY_VALUE_MAX];
property_get("debug.egl.swapinterval", pval, "-1");
int property_interval = atoi(pval);
if (property_interval >= 0)
interval = property_interval;
fb_context_t* ctx = (fb_context_t*)dev;
private_module_t* m = reinterpret_cast<private_module_t*>(
dev->common.module);
if (interval < dev->minSwapInterval || interval > dev->maxSwapInterval)
return -EINVAL;
m->swapInterval = interval;
return 0;
}
static int fb_post(struct framebuffer_device_t* dev, buffer_handle_t buffer)
{
fb_context_t* ctx = (fb_context_t*) dev;
private_handle_t *hnd = static_cast<private_handle_t*>
(const_cast<native_handle_t*>(buffer));
private_module_t* m =
reinterpret_cast<private_module_t*>(dev->common.module);
if (hnd) {
m->info.activate = FB_ACTIVATE_VBL | FB_ACTIVATE_FORCE;
m->info.yoffset = hnd->offset / m->finfo.line_length;
#ifdef MSMFB_DISPLAY_COMMIT
m->commit.var = m->info;
m->commit.flags |= MDP_DISPLAY_COMMIT_OVERLAY;
if (ioctl(m->framebuffer->fd, MSMFB_DISPLAY_COMMIT, &m->commit) == -1) {
ALOGE("%s: MSMFB_DISPLAY_COMMIT ioctl failed, err: %s", __FUNCTION__,
strerror(errno));
#else
if (ioctl(m->framebuffer->fd, FBIOPUT_VSCREENINFO, &m->info) == -1) {
ALOGE("%s: FBIOPUT_VSCREENINFO ioctl failed, err: %s", __FUNCTION__,
strerror(errno));
#endif
return -errno;
}
}
return 0;
}
static int fb_compositionComplete(struct framebuffer_device_t* dev)
{
// TODO: Properly implement composition complete callback
glFinish();
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];
char property[PROPERTY_VALUE_MAX];
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;
#ifdef MSMFB_DISPLAY_COMMIT
memset(&module->commit, 0, sizeof(struct mdp_display_commit));
#endif
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;
/* Interpretation of offset for color fields: All offsets are from the
* right, inside a "pixel" value, which is exactly 'bits_per_pixel' wide
* (means: you can use the offset as right argument to <<). A pixel
* afterwards is a bit stream and is written to video memory as that
* unmodified. This implies big-endian byte order if bits_per_pixel is
* greater than 8.
*/
if(info.bits_per_pixel == 32) {
/*
* Explicitly request RGBA_8888
*/
#if defined(SEMC_RGBA_8888_OFFSET) || defined(HTC_RGBA_8888_OFFSET)
info.red.offset = 0;
info.green.offset = 8;
info.blue.offset = 16;
#ifdef SEMC_RGBA_8888_OFFSET
info.transp.offset = 24;
#else
info.transp.offset = 0;
#endif
#else
info.red.offset = 24;
info.green.offset = 16;
info.blue.offset = 8;
info.transp.offset = 0;
#endif
info.bits_per_pixel = 32;
info.red.length = 8;
info.green.length = 8;
info.blue.length = 8;
info.transp.length = 8;
/* Note: the GL driver does not have a r=8 g=8 b=8 a=0 config, so if we
* do not use the MDP for composition (i.e. hw composition == 0), ask
* for RGBA instead of RGBX. */
if (property_get("debug.sf.hw", property, NULL) > 0 &&
atoi(property) == 0)
module->fbFormat = HAL_PIXEL_FORMAT_RGBX_8888;
else if(property_get("debug.composition.type", property, NULL) > 0 &&
(strncmp(property, "mdp", 3) == 0))
module->fbFormat = HAL_PIXEL_FORMAT_RGBX_8888;
else
module->fbFormat = HAL_PIXEL_FORMAT_RGBA_8888;
} else {
/*
* 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;
module->fbFormat = HAL_PIXEL_FORMAT_RGB_565;
}
//adreno needs 4k aligned offsets. Max hole size is 4096-1
int size = roundUpToPageSize(info.yres * info.xres *
(info.bits_per_pixel/8));
/*
* Request NUM_BUFFERS screens (at least 2 for page flipping)
*/
int numberOfBuffers = (int)(finfo.smem_len/size);
ALOGV("num supported framebuffers in kernel = %d", numberOfBuffers);
if (property_get("debug.gr.numframebuffers", property, NULL) > 0) {
int num = atoi(property);
if ((num >= NUM_FRAMEBUFFERS_MIN) && (num <= NUM_FRAMEBUFFERS_MAX)) {
numberOfBuffers = num;
}
}
if (numberOfBuffers > NUM_FRAMEBUFFERS_MAX)
numberOfBuffers = NUM_FRAMEBUFFERS_MAX;
ALOGV("We support %d buffers", numberOfBuffers);
//consider the included hole by 4k alignment
uint32_t line_length = (info.xres * info.bits_per_pixel / 8);
info.yres_virtual = (size * numberOfBuffers) / line_length;
uint32_t flags = PAGE_FLIP;
if (info.yres_virtual < ((size * 2) / line_length) ) {
// we need at least 2 for page-flipping
info.yres_virtual = size / line_length;
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;
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;
//The reserved[3] field is used to store FPS by the driver.
#ifndef REFRESH_RATE
float fps = info.reserved[3] & 0xFF;
#else
float fps = REFRESH_RATE;
#endif
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;
module->swapInterval = 1;
CALC_INIT();
/*
* map the framebuffer
*/
int err;
module->numBuffers = 2;
module->bufferMask = 0;
//adreno needs page aligned offsets. Align the fbsize to pagesize.
size_t fbSize = roundUpToPageSize(finfo.line_length * info.yres)*
module->numBuffers;
module->framebuffer = new private_handle_t(fd, fbSize,
private_handle_t::PRIV_FLAGS_USES_PMEM,
BUFFER_TYPE_UI,
module->fbFormat, info.xres, info.yres);
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);
module->currentOffset = 0;
module->fbPostDone = false;
pthread_mutex_init(&(module->fbPostLock), NULL);
pthread_cond_init(&(module->fbPostCond), NULL);
module->fbPanDone = false;
pthread_mutex_init(&(module->fbPanLock), NULL);
pthread_cond_init(&(module->fbPanCond), NULL);
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) {
//Hack until fbdev is removed. Framework could close this causing hwc a
//pain.
//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)) {
alloc_device_t* gralloc_device;
status = gralloc_open(module, &gralloc_device);
if (status < 0)
return status;
/* 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<hw_module_t*>(module);
dev->device.common.close = fb_close;
dev->device.setSwapInterval = fb_setSwapInterval;
dev->device.post = fb_post;
dev->device.setUpdateRect = 0;
dev->device.compositionComplete = fb_compositionComplete;
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);
const_cast<uint32_t&>(dev->device.flags) = 0;
const_cast<uint32_t&>(dev->device.width) = m->info.xres;
const_cast<uint32_t&>(dev->device.height) = m->info.yres;
const_cast<int&>(dev->device.stride) = stride;
const_cast<int&>(dev->device.format) = m->fbFormat;
const_cast<float&>(dev->device.xdpi) = m->xdpi;
const_cast<float&>(dev->device.ydpi) = m->ydpi;
const_cast<float&>(dev->device.fps) = m->fps;
const_cast<int&>(dev->device.minSwapInterval) =
PRIV_MIN_SWAP_INTERVAL;
const_cast<int&>(dev->device.maxSwapInterval) =
PRIV_MAX_SWAP_INTERVAL;
const_cast<int&>(dev->device.numFramebuffers) = m->numBuffers;
dev->device.setUpdateRect = 0;
*device = &dev->device.common;
}
// Close the gralloc module
gralloc_close(gralloc_device);
}
return status;
}
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