3fdb2eb668
In certain cases, such as the shutdown sequence, the driver may blank itself without any direction from SurfaceFlinger. In such cases the HWC should make sure that no further updates on the display occur. Handle events from driver in a more generic way to include blank events and leave room for any other events that need to be polled on from the driver. Change-Id: Iabc91a70e71b42d3a7319504ae70b96908acbffe CRs-fixed: 627814
217 lines
7.4 KiB
C++
217 lines
7.4 KiB
C++
/*
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* Copyright (C) 2010 The Android Open Source Project
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* Copyright (C) 2012-2014, The Linux Foundation. All rights reserved.
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*
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* Not a Contribution, Apache license notifications and license are
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* retained for attribution purposes only.
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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 <cutils/properties.h>
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#include <utils/Log.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <linux/msm_mdp.h>
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#include <sys/resource.h>
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#include <sys/prctl.h>
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#include <poll.h>
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#include "hwc_utils.h"
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#include "string.h"
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#include "external.h"
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#include "overlay.h"
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#define __STDC_FORMAT_MACROS 1
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#include <inttypes.h>
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namespace qhwc {
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#define HWC_VSYNC_THREAD_NAME "hwcVsyncThread"
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#define MAX_SYSFS_FILE_PATH 255
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#define PANEL_ON_STR "panel_power_on ="
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#define ARRAY_LENGTH(array) (sizeof((array))/sizeof((array)[0]))
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const int MAX_DATA = 64;
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bool logvsync = false;
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int hwc_vsync_control(hwc_context_t* ctx, int dpy, int enable)
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{
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int ret = 0;
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if(!ctx->vstate.fakevsync &&
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ioctl(ctx->dpyAttr[dpy].fd, MSMFB_OVERLAY_VSYNC_CTRL,
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&enable) < 0) {
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ALOGE("%s: vsync control failed. Dpy=%d, enable=%d : %s",
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__FUNCTION__, dpy, enable, strerror(errno));
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ret = -errno;
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}
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return ret;
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}
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static void handle_vsync_event(hwc_context_t* ctx, int dpy, char *data)
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{
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// extract timestamp
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uint64_t timestamp = 0;
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if (!strncmp(data, "VSYNC=", strlen("VSYNC="))) {
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timestamp = strtoull(data + strlen("VSYNC="), NULL, 0);
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}
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// send timestamp to SurfaceFlinger
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ALOGD_IF (logvsync, "%s: timestamp %"PRIu64" sent to SF for dpy=%d",
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__FUNCTION__, timestamp, dpy);
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ctx->proc->vsync(ctx->proc, dpy, timestamp);
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}
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static void handle_blank_event(hwc_context_t* ctx, int dpy, char *data)
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{
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if (!strncmp(data, PANEL_ON_STR, strlen(PANEL_ON_STR))) {
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uint32_t poweron = strtoul(data + strlen(PANEL_ON_STR), NULL, 0);
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ALOGI("%s: dpy:%d panel power state: %d", __FUNCTION__, dpy, poweron);
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ctx->dpyAttr[dpy].isActive = poweron ? true: false;
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}
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}
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struct event {
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const char* name;
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void (*callback)(hwc_context_t* ctx, int dpy, char *data);
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};
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struct event event_list[] = {
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{ "vsync_event", handle_vsync_event },
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{ "show_blank_event", handle_blank_event },
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};
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#define num_events ARRAY_LENGTH(event_list)
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static void *vsync_loop(void *param)
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{
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hwc_context_t * ctx = reinterpret_cast<hwc_context_t *>(param);
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char thread_name[64] = HWC_VSYNC_THREAD_NAME;
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prctl(PR_SET_NAME, (unsigned long) &thread_name, 0, 0, 0);
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setpriority(PRIO_PROCESS, 0, HAL_PRIORITY_URGENT_DISPLAY +
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android::PRIORITY_MORE_FAVORABLE);
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char vdata[MAX_DATA];
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//Number of physical displays
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//We poll on all the nodes.
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int num_displays = HWC_NUM_DISPLAY_TYPES - 1;
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struct pollfd pfd[num_displays][num_events];
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char property[PROPERTY_VALUE_MAX];
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if(property_get("debug.hwc.fakevsync", property, NULL) > 0) {
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if(atoi(property) == 1)
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ctx->vstate.fakevsync = true;
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}
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if(property_get("debug.hwc.logvsync", property, 0) > 0) {
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if(atoi(property) == 1)
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logvsync = true;
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}
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char node_path[MAX_SYSFS_FILE_PATH];
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for (int dpy = HWC_DISPLAY_PRIMARY; dpy < num_displays; dpy++) {
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for(size_t ev = 0; ev < num_events; ev++) {
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snprintf(node_path, sizeof(node_path),
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"/sys/class/graphics/fb%d/%s",
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dpy == HWC_DISPLAY_PRIMARY ? 0 :
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overlay::Overlay::getInstance()->
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getFbForDpy(HWC_DISPLAY_EXTERNAL),
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event_list[ev].name);
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ALOGI("%s: Reading event %zu for dpy %d from %s", __FUNCTION__,
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ev, dpy, node_path);
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pfd[dpy][ev].fd = open(node_path, O_RDONLY);
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if (dpy == HWC_DISPLAY_PRIMARY && pfd[dpy][ev].fd < 0) {
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// Make sure fb device is opened before starting
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// this thread so this never happens.
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ALOGE ("%s:unable to open event node for dpy=%d event=%zu, %s",
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__FUNCTION__, dpy, ev, strerror(errno));
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if (ev == 0) {
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ctx->vstate.fakevsync = true;
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//XXX: Blank events don't work with fake vsync,
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//but we shouldn't be running on fake vsync anyway.
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break;
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}
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}
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pread(pfd[dpy][ev].fd, vdata , MAX_DATA, 0);
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if (pfd[dpy][ev].fd >= 0)
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pfd[dpy][ev].events = POLLPRI | POLLERR;
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}
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}
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if (LIKELY(!ctx->vstate.fakevsync)) {
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do {
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int err = poll(*pfd, num_displays * num_events, -1);
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if(err > 0) {
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for (int dpy = HWC_DISPLAY_PRIMARY; dpy < num_displays; dpy++) {
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for(size_t ev = 0; ev < num_events; ev++) {
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if (pfd[dpy][ev].revents & POLLPRI) {
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err = pread(pfd[dpy][ev].fd, vdata, MAX_DATA, 0);
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if (UNLIKELY(err < 0)) {
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// If the read was just interrupted - it is not
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// a fatal error. Just continue in this case
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ALOGE ("%s: Unable to read event:%zu for \
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dpy=%d : %s",
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__FUNCTION__, ev, dpy, strerror(errno));
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continue;
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}
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event_list[ev].callback(ctx, dpy, vdata);
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}
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}
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}
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} else {
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ALOGE("%s: poll failed errno: %s", __FUNCTION__,
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strerror(errno));
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continue;
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}
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} while (true);
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} else {
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//Fake vsync is used only when set explicitly through a property or when
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//the vsync timestamp node cannot be opened at bootup. There is no
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//fallback to fake vsync from the true vsync loop, ever, as the
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//condition can easily escape detection.
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//Also, fake vsync is delivered only for the primary display.
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do {
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usleep(16666);
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uint64_t timestamp = systemTime();
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ctx->proc->vsync(ctx->proc, HWC_DISPLAY_PRIMARY, timestamp);
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} while (true);
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}
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for (int dpy = HWC_DISPLAY_PRIMARY; dpy <= HWC_DISPLAY_EXTERNAL; dpy++ ) {
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for( size_t event = 0; event < num_events; event++) {
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if(pfd[dpy][event].fd >= 0)
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close (pfd[dpy][event].fd);
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}
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}
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return NULL;
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}
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void init_vsync_thread(hwc_context_t* ctx)
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{
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int ret;
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pthread_t vsync_thread;
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ALOGI("Initializing VSYNC Thread");
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ret = pthread_create(&vsync_thread, NULL, vsync_loop, (void*) ctx);
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if (ret) {
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ALOGE("%s: failed to create %s: %s", __FUNCTION__,
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HWC_VSYNC_THREAD_NAME, strerror(ret));
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}
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}
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}; //namespace
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