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145 lines
4.6 KiB
145 lines
4.6 KiB
/* |
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* Copyright (C) 2010 The Android Open Source Project |
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* Copyright (C) 2012-2013, 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 "hwc_utils.h" |
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#include "string.h" |
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#include "external.h" |
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namespace qhwc { |
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#define HWC_VSYNC_THREAD_NAME "hwcVsyncThread" |
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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 *vsync_loop(void *param) |
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{ |
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const char* vsync_timestamp_fb0 = "/sys/class/graphics/fb0/vsync_event"; |
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const char* vsync_timestamp_fb1 = "/sys/class/graphics/fb1/vsync_event"; |
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int dpy = HWC_DISPLAY_PRIMARY; |
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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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const int MAX_DATA = 64; |
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static char vdata[MAX_DATA]; |
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uint64_t cur_timestamp=0; |
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ssize_t len = -1; |
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int fd_timestamp = -1; |
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bool fb1_vsync = false; |
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bool logvsync = false; |
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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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/* Currently read vsync timestamp from drivers |
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e.g. VSYNC=41800875994 |
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*/ |
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fd_timestamp = open(vsync_timestamp_fb0, O_RDONLY); |
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if (fd_timestamp < 0) { |
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// Make sure fb device is opened before starting this thread so this |
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// never happens. |
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ALOGE ("FATAL:%s:not able to open file:%s, %s", __FUNCTION__, |
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(fb1_vsync) ? vsync_timestamp_fb1 : vsync_timestamp_fb0, |
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strerror(errno)); |
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ctx->vstate.fakevsync = true; |
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} |
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do { |
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if (LIKELY(!ctx->vstate.fakevsync)) { |
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len = pread(fd_timestamp, vdata, MAX_DATA, 0); |
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if (len < 0) { |
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// If the read was just interrupted - it is not a fatal error |
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// In either case, just continue. |
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if (errno != EAGAIN && |
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errno != EINTR && |
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errno != EBUSY) { |
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ALOGE ("FATAL:%s:not able to read file:%s, %s", |
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__FUNCTION__, |
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vsync_timestamp_fb0, strerror(errno)); |
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} |
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continue; |
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} |
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// extract timestamp |
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const char *str = vdata; |
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if (!strncmp(str, "VSYNC=", strlen("VSYNC="))) { |
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cur_timestamp = strtoull(str + strlen("VSYNC="), NULL, 0); |
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} |
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} else { |
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usleep(16666); |
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cur_timestamp = systemTime(); |
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} |
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// send timestamp to HAL |
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if(ctx->vstate.enable) { |
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ALOGD_IF (logvsync, "%s: timestamp %llu sent to HWC for %s", |
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__FUNCTION__, cur_timestamp, "fb0"); |
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ctx->proc->vsync(ctx->proc, dpy, cur_timestamp); |
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} |
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} while (true); |
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if(fd_timestamp >= 0) |
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close (fd_timestamp); |
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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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