Bug #111311
测试 Test-IT #110867: V1.0测试功能汇总
测试 Test-IT #110868: BSP-BVT测试-上/下电测试
【BSP】【EVT】【Power】【偶现两次】设备正常重启，lvds无信号输出，屏幕显示黑屏
| Status: | CLOSED | Start date: | 2022-08-17 | |
|---|---|---|---|---|
| Priority: | High | Due date: | ||
| Assignee: | SZTS_TEST 邹涛 | % Done: | 100% | |
| Category: | BSP | |||
| Target version: | - | |||
| Need_Info: | -- | Found Version: | 0.0.0.20220817_alpha_private_userdebug | |
| Resolution: | -- | Degrated: | -- | |
| Severity: | Normal | Verified Version: | 0.0.0.20220901_alpha_private_userdebug | |
| Reproducibility: | Rarely | Fixed Version: | ||
| Test Type: | Bring Up Test | Root cause: |
Description
前置条件：
1、DUT各模块功能正常且处于开机状态
操作步骤：
1、settings内连接蓝牙音箱、蓝牙鼠标、蓝牙键盘
2、执行adb reboot，重启过程中查看屏幕画面显示
预期结果：
1、lvds正常输出信号，屏幕正常显示内容
实际结果：
1、lvds无信号输出，屏幕显示为黑屏
2、adb正常可用
Serial-COM4_20220817113915.rar (659 KB)
logcat_设备开机无信号输出，屏幕显示黑屏.rar (223 KB)
logcat.rar (447 KB)
dmesg_0829_LVDS_unwork.txt 
(787 KB)
logcat.txt
(2.58 MB)
History
#1 Updated by SZTS_TEST 邹涛 almost 3 years ago
- Subject changed from 【BSP】【EVT】【Power】【偶现两次】设备正常重启，lvds无信号输出，屏幕 to 【BSP】【EVT】【Power】【偶现两次】设备正常重启，lvds无信号输出，屏幕显示黑屏
#2 Updated by SZTS_TEST 邹涛 almost 3 years ago
- File logcat.rar added
#3 Updated by SZTS_TEST 邹涛 almost 3 years ago
- File dmesg_0829_LVDS_unwork.txt added
#4 Updated by 软件二组_SD3 朱彦斌 almost 3 years ago
从log上分析，黑屏不显示的直接原因是MAX96755/96752芯片初始化后第一次给屏端MCU发送心跳包超时（初始化后，间隔2s一次），导致MCU将解串器掉电复位，从而导致串行解串器之间unlock。
目前还在确认MCU复位逻辑，调查是否可以尽早发送心跳包或缩短心跳包间隔，保证屏端MCU处于唤醒状态。
#5 Updated by SZTS_TEST 邹涛 almost 3 years ago
- File logcat.txt added
#6 Updated by CD BSP-余霄 almost 3 years ago
如上分析
Patch：
http://10.0.232.3/gerrit/c/general/kernel/msm-4.19/+/145461
验证步骤：
同一台设备
DB验证：
重启20次 复现2次
使用VB验证：
重启50次， android动画与Launcher均能正常显示
#7 Updated by CD BSP-余霄 almost 3 years ago
- Status changed from New to RESOLVED
#8 Updated by CD TPM-申艳艳 almost 3 years ago
- % Done changed from 0 to 100
- Verified Version set to 0.0.0.20220901_alpha_private_userdebug
#9 Updated by CD TPM-申艳艳 almost 3 years ago
- Assignee changed from 软件二组_SD3 朱彦斌 to SZTS_TEST 邹涛
#11 Updated by CDTS_TEST 王成 almost 3 years ago
- Status changed from VERIFIED to CLOSED
#12 Updated by CD TPM-申艳艳 almost 3 years ago
- Category set to BSP
#13 Updated by CD FW-王伟 over 2 years ago
Gerrit Merge Information：
| ID | Project | Branch | Uploader |
| 145461 | general/kernel/msm-4.19 | Pre_figure_turbox-c2130c-la1.1-vendor-dev | yanbin.zhu@thundercomm.com |
| BSP:LCD: Fix Occasional Black Screen Remove Unnecessary delay while initializing MAX96755/752 Send Heartbeat cmd to Panel's MCU as soon as possible after Initialization TC-RID: 1201-0100501 IssueID: TS-R-DF-111311 Change-Id: I43eb008ca72ef3fe35eda48fd5efebfdfbcf38f5 |
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