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243 lines
8.3 KiB
243 lines
8.3 KiB
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/* |
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* Copyright (C) 2010 The Android Open Source Project |
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* Copyright (C) 2012-14, 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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#define UEVENT_DEBUG 0 |
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#include <hardware_legacy/uevent.h> |
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#include <utils/Log.h> |
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#include <sys/resource.h> |
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#include <sys/prctl.h> |
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#include <string.h> |
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#include <stdlib.h> |
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#include "hwc_utils.h" |
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#include "hwc_fbupdate.h" |
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#include "hwc_mdpcomp.h" |
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#include "hwc_copybit.h" |
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#include "comptype.h" |
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#include "hdmi.h" |
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#include "hwc_virtual.h" |
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#include "mdp_version.h" |
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using namespace overlay; |
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namespace qhwc { |
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#define HWC_UEVENT_SWITCH_STR "change@/devices/virtual/switch/" |
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#define HWC_UEVENT_THREAD_NAME "hwcUeventThread" |
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/* Parse uevent data for devices which we are interested */ |
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static int getConnectedDisplay(hwc_context_t* ctx, const char* strUdata) |
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{ |
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int ret = -1; |
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// Switch node for HDMI as PRIMARY/EXTERNAL |
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if(strcasestr("change@/devices/virtual/switch/hdmi", strUdata)) { |
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if (ctx->mHDMIDisplay->isHDMIPrimaryDisplay()) { |
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ret = HWC_DISPLAY_PRIMARY; |
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} else { |
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ret = HWC_DISPLAY_EXTERNAL; |
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} |
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} |
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return ret; |
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} |
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static bool getPanelResetStatus(hwc_context_t* ctx, const char* strUdata, int len) |
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{ |
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const char* iter_str = strUdata; |
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if (strcasestr("change@/devices/virtual/graphics/fb0", strUdata)) { |
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while(((iter_str - strUdata) <= len) && (*iter_str)) { |
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const char* pstr = strstr(iter_str, "PANEL_ALIVE=0"); |
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if (pstr != NULL) { |
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ALOGI("%s: got change event in fb0 with PANEL_ALIVE=0", |
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__FUNCTION__); |
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ctx->mPanelResetStatus = true; |
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return true; |
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} |
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iter_str += strlen(iter_str)+1; |
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} |
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} |
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return false; |
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} |
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/* Parse uevent data for action requested for the display */ |
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static int getConnectedState(const char* strUdata, int len) |
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{ |
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const char* iter_str = strUdata; |
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while(((iter_str - strUdata) <= len) && (*iter_str)) { |
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const char* pstr = strstr(iter_str, "SWITCH_STATE="); |
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if (pstr != NULL) { |
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return (atoi(pstr + strlen("SWITCH_STATE="))); |
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} |
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iter_str += strlen(iter_str)+1; |
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} |
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return -1; |
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} |
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static void handle_uevent(hwc_context_t* ctx, const char* udata, int len) |
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{ |
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bool bpanelReset = getPanelResetStatus(ctx, udata, len); |
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if (bpanelReset) { |
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ctx->proc->invalidate(ctx->proc); |
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return; |
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} |
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int dpy = getConnectedDisplay(ctx, udata); |
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if(dpy < 0) { |
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ALOGD_IF(UEVENT_DEBUG, "%s: Not disp Event ", __FUNCTION__); |
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return; |
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} |
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int switch_state = getConnectedState(udata, len); |
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ALOGE_IF(UEVENT_DEBUG,"%s: uevent received: %s switch state: %d", |
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__FUNCTION__,udata, switch_state); |
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switch(switch_state) { |
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case EXTERNAL_OFFLINE: |
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{ |
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/* Display not connected */ |
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if(!ctx->dpyAttr[dpy].connected){ |
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ALOGE_IF(UEVENT_DEBUG,"%s: Ignoring EXTERNAL_OFFLINE event" |
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"for display: %d", __FUNCTION__, dpy); |
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break; |
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} |
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ctx->mDrawLock.lock(); |
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handle_offline(ctx, dpy); |
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ctx->mDrawLock.unlock(); |
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/* We need to send hotplug to SF only when we are disconnecting |
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* HDMI as an external display. */ |
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if(dpy == HWC_DISPLAY_EXTERNAL) { |
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ALOGE_IF(UEVENT_DEBUG,"%s:Sending EXTERNAL OFFLINE hotplug" |
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"event", __FUNCTION__); |
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ctx->proc->hotplug(ctx->proc, dpy, EXTERNAL_OFFLINE); |
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} |
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break; |
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} |
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case EXTERNAL_ONLINE: |
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{ |
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/* Display already connected */ |
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if(ctx->dpyAttr[dpy].connected) { |
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ALOGE_IF(UEVENT_DEBUG,"%s: Ignoring EXTERNAL_ONLINE event" |
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"for display: %d", __FUNCTION__, dpy); |
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break; |
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} |
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if (ctx->mHDMIDisplay->isHDMIPrimaryDisplay()) { |
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ctx->mDrawLock.lock(); |
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handle_online(ctx, dpy); |
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ctx->mDrawLock.unlock(); |
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ctx->proc->invalidate(ctx->proc); |
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break; |
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} else { |
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ctx->mDrawLock.lock(); |
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//Force composition to give up resources like pipes and |
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//close fb. For example if assertive display is going on, |
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//fb2 could be open, thus connecting Layer Mixer#0 to |
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//WriteBack module. If HDMI attempts to open fb1, the driver |
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//will try to attach Layer Mixer#0 to HDMI INT, which will |
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//fail, since Layer Mixer#0 is still connected to WriteBack. |
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//This block will force composition to close fb2 in above |
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//example. |
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ctx->dpyAttr[dpy].isConfiguring = true; |
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ctx->mDrawLock.unlock(); |
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ctx->proc->invalidate(ctx->proc); |
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} |
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//2 cycles for slower content |
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usleep(ctx->dpyAttr[HWC_DISPLAY_PRIMARY].vsync_period |
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* 2 / 1000); |
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if(isVDConnected(ctx)) { |
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// Do not initiate WFD teardown if WFD architecture is based |
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// on VDS mechanism. |
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// WFD Stack listens to HDMI intent and initiates virtual |
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// display teardown. |
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// ToDo: Currently non-WFD Virtual display clients do not |
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// involve HWC. If there is a change, we need to come up |
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// with mechanism of how to address non-WFD Virtual display |
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// clients + HDMI |
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ctx->mWfdSyncLock.lock(); |
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ALOGD_IF(HWC_WFDDISPSYNC_LOG, |
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"%s: Waiting for wfd-teardown to be signalled", |
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__FUNCTION__); |
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ctx->mWfdSyncLock.wait(); |
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ALOGD_IF(HWC_WFDDISPSYNC_LOG, |
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"%s: Teardown signalled. Completed waiting in" |
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"uevent thread", __FUNCTION__); |
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ctx->mWfdSyncLock.unlock(); |
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} |
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ctx->mHDMIDisplay->configure(); |
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ctx->mHDMIDisplay->activateDisplay(); |
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ctx->mDrawLock.lock(); |
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updateDisplayInfo(ctx, dpy); |
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initCompositionResources(ctx, dpy); |
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ctx->dpyAttr[dpy].isPause = false; |
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ctx->dpyAttr[dpy].connected = true; |
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ctx->dpyAttr[dpy].isConfiguring = true; |
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ctx->mDrawLock.unlock(); |
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/* External display is HDMI */ |
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ALOGE_IF(UEVENT_DEBUG, "%s: Sending EXTERNAL ONLINE" |
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"hotplug event", __FUNCTION__); |
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ctx->proc->hotplug(ctx->proc, dpy, EXTERNAL_ONLINE); |
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break; |
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} |
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default: |
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{ |
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ALOGE("%s: Invalid state to swtich:%d", __FUNCTION__, switch_state); |
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break; |
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} |
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} |
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} |
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static void *uevent_loop(void *param) |
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{ |
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int len = 0; |
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static char udata[PAGE_SIZE]; |
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hwc_context_t * ctx = reinterpret_cast<hwc_context_t *>(param); |
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char thread_name[64] = HWC_UEVENT_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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if(!uevent_init()) { |
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ALOGE("%s: failed to init uevent ",__FUNCTION__); |
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return NULL; |
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} |
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while(1) { |
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len = uevent_next_event(udata, (int)sizeof(udata) - 2); |
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handle_uevent(ctx, udata, len); |
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} |
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return NULL; |
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} |
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void init_uevent_thread(hwc_context_t* ctx) |
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{ |
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pthread_t uevent_thread; |
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int ret; |
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ALOGI("Initializing UEVENT Thread"); |
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ret = pthread_create(&uevent_thread, NULL, uevent_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_UEVENT_THREAD_NAME, strerror(ret)); |
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} |
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} |
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}; //namespace
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