/*
* Copyright (c) 2013 The Linux Foundation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* * Neither the name of The Linux Foundation. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#define DEBUG 0
#include <ctype.h>
#include <fcntl.h>
#include <media/IAudioPolicyService.h>
#include <media/AudioSystem.h>
#include <utils/threads.h>
#include <utils/Errors.h>
#include <utils/Log.h>
#include <linux/msm_mdp.h>
#include <linux/fb.h>
#include <sys/ioctl.h>
#include <sys/poll.h>
#include <sys/resource.h>
#include <cutils/properties.h>
#include "hwc_utils.h"
#include "virtual.h"
#include "overlayUtils.h"
#include "overlay.h"
#include "mdp_version.h"
using namespace android;
namespace qhwc {
#define MAX_SYSFS_FILE_PATH 255
/* Max. resolution assignable to virtual display. */
#define SUPPORTED_VIRTUAL_AREA (1920*1080)
int VirtualDisplay::configure() {
if(!openFrameBuffer())
return -1;
if(ioctl(mFd, FBIOGET_VSCREENINFO, &mVInfo) < 0) {
ALOGD("%s: FBIOGET_VSCREENINFO failed with %s", __FUNCTION__,
strerror(errno));
return -1;
}
setAttributes();
return 0;
}
void VirtualDisplay::getAttributes(int& width, int& height) {
width = mVInfo.xres;
height = mVInfo.yres;
}
int VirtualDisplay::teardown() {
closeFrameBuffer();
memset(&mVInfo, 0, sizeof(mVInfo));
// Reset the resolution when we close the fb for this device. We need
// this to distinguish between an ONLINE and RESUME event.
mHwcContext->dpyAttr[HWC_DISPLAY_VIRTUAL].xres = 0;
mHwcContext->dpyAttr[HWC_DISPLAY_VIRTUAL].yres = 0;
return 0;
}
VirtualDisplay::VirtualDisplay(hwc_context_t* ctx):mFd(-1),
mHwcContext(ctx)
{
memset(&mVInfo, 0, sizeof(mVInfo));
}
VirtualDisplay::~VirtualDisplay()
{
closeFrameBuffer();
}
/* Initializes the resolution attributes of the virtual display
that are reported to SurfaceFlinger.
Cases:
1. ONLINE event - initialize to frame buffer resolution
2. RESUME event - retain original resolution
*/
void VirtualDisplay::initResolution(uint32_t &extW, uint32_t &extH) {
// On ONLINE event, display resolution attributes are 0.
if(extW == 0 || extH == 0){
extW = mVInfo.xres;
extH = mVInfo.yres;
}
}
/* Sets the virtual resolution to match that of the primary
display in the event that the virtual display currently
connected has a lower resolution. NB: we always report the
highest available resolution to SurfaceFlinger.
*/
void VirtualDisplay::setToPrimary(uint32_t maxArea,
uint32_t priW,
uint32_t priH,
uint32_t &extW,
uint32_t &extH) {
// for eg., primary in 1600p and WFD in 1080p
// we wont use downscale feature because MAX MDP
// writeback resolution supported is 1080p (tracked
// by SUPPORTED_VIRTUAL_AREA).
if((maxArea == (priW * priH))
&& (maxArea <= SUPPORTED_VIRTUAL_AREA)) {
extW = priW;
extH = priH;
// If WFD is in landscape, assign the higher dimension
// to WFD's xres.
if(priH > priW) {
extW = priH;
extH = priW;
}
}
}
/* Set External Display MDP Downscale mode indicator. Only set to
TRUE for the following scenarios:
1. Valid DRC scenarios i.e. when the original WFD resolution
is greater than the new/requested resolution in mVInfo.
2. WFD down scale path i.e. when WFD resolution is lower than
primary resolution.
Furthermore, downscale mode is only valid when downscaling from
SUPPORTED_VIRTUAL_AREA to a lower resolution.
(SUPPORTED_VIRTUAL_AREA represents the maximum resolution that
we can configure to the virtual display)
*/
void VirtualDisplay::setDownScaleMode(uint32_t maxArea) {
if((maxArea > (mVInfo.xres * mVInfo.yres))
&& (maxArea <= SUPPORTED_VIRTUAL_AREA)) {
mHwcContext->dpyAttr[HWC_DISPLAY_VIRTUAL].mDownScaleMode = true;
}else {
mHwcContext->dpyAttr[HWC_DISPLAY_VIRTUAL].mDownScaleMode = false;
}
}
void VirtualDisplay::setAttributes() {
if(mHwcContext) {
uint32_t &extW = mHwcContext->dpyAttr[HWC_DISPLAY_VIRTUAL].xres;
uint32_t &extH = mHwcContext->dpyAttr[HWC_DISPLAY_VIRTUAL].yres;
uint32_t priW = mHwcContext->dpyAttr[HWC_DISPLAY_PRIMARY].xres;
uint32_t priH = mHwcContext->dpyAttr[HWC_DISPLAY_PRIMARY].yres;
initResolution(extW, extH);
// Dynamic Resolution Change depends on MDP downscaling.
// MDP downscale property will be ignored to exercise DRC use case.
// If DRC is in progress, ext WxH will have non-zero values.
bool isDRC = (extW > 0) && (extH > 0);
if(!qdutils::MDPVersion::getInstance().is8x26()
&& (mHwcContext->mMDPDownscaleEnabled || isDRC)) {
// maxArea represents the maximum resolution between
// primary and virtual display.
uint32_t maxArea = max((extW * extH), (priW * priH));
setToPrimary(maxArea, priW, priH, extW, extH);
setDownScaleMode(maxArea);
}
mHwcContext->dpyAttr[HWC_DISPLAY_VIRTUAL].vsync_period =
1000000000l /60;
ALOGD_IF(DEBUG,"%s: Setting Virtual Attr: res(%d x %d)",__FUNCTION__,
mVInfo.xres, mVInfo.yres);
}
}
bool VirtualDisplay::openFrameBuffer()
{
if (mFd == -1) {
int fbNum = overlay::Overlay::getInstance()->
getFbForDpy(HWC_DISPLAY_VIRTUAL);
char strDevPath[MAX_SYSFS_FILE_PATH];
snprintf(strDevPath,sizeof(strDevPath), "/dev/graphics/fb%d", fbNum);
mFd = open(strDevPath, O_RDWR);
if(mFd < 0) {
ALOGE("%s: Unable to open %s ", __FUNCTION__,strDevPath);
return -1;
}
mHwcContext->dpyAttr[HWC_DISPLAY_VIRTUAL].fd = mFd;
}
return 1;
}
bool VirtualDisplay::closeFrameBuffer()
{
if(mFd >= 0) {
if(close(mFd) < 0 ) {
ALOGE("%s: Unable to close FD(%d)", __FUNCTION__, mFd);
return -1;
}
mFd = -1;
mHwcContext->dpyAttr[HWC_DISPLAY_VIRTUAL].fd = mFd;
}
return 1;
}
};