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IDProjectCategoryView StatusLast Update
0001277T99X171.00 SKB EagleVOCpublic2021-09-30 10:47
Reporter(ALTech) Younkwang Jung Assigned To(ALTech) Younkwang Jung Due Date
PrioritynormalSeveritys2-severeReproducibilityhave not tried
Status closedResolutionfixed 
Summary0001277: [Smart3][BTF]\[VoC] a 'tak'(looks like noise ) sound is generated when turn on integrated power button
DescriptionHi Kerwin

TV : Samsung (QN55Q85RAFXKR)
FW : v15.524.4

a 'tak'(looks like noise ) sound is generated when turn on integrated power button
There is no noise when the TV is on/off only
And similar issue was reported in INTEK STB

jira link is
https://jira.skbroadband.com/browse/BTVV-2808

I attached the log. please let me know if there are any clues in the log that can cause noise.

Thank you
YK.Jung
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Users monitoring this issue

User List (ALTech) SY Yoon , (SW) Brent Choi

Activities

(ALTech) Younkwang Jung

2021-06-10 18:00

developer  

(SW) Peter Chen

2021-06-15 12:05

developer   ~0007463

Hi Younkwang,

Compare the log with normal status, hdcp authentication stopped.
-----> 'tak' log
06-08 19:46:57.173 9598 9598 I hdcp_tx22: [TX] content_type 1, restart
06-08 19:46:57.178 9598 9598 I hdcp_tx22: FSM STATE_STOP_AUTH
-----> normal log
06-11 19:41:39.042 8586 8586 I hdcp_tx22: [ESM] Authenticated
06-11 19:41:39.042 8586 8586 I hdcp_tx22: [ESM] Encryption enabled

Thanks.
hdcp_normal.log (1,567,358 bytes)

(ALTech) Younkwang Jung

2021-07-05 13:10

developer   ~0007603

Last edited: 2021-07-05 13:10

View 2 revisions

Hi Peter

This issue is caused by turning off AVMUTE even though HDCP certification has not been completed.

That is ..
HDCP certification can occur multiple times when the HDCP repeater is connected.
Sound bar connected to the TV has HDCP repeater built-in.
This issue is occurring when STB is connected to this Sound bar.
That is , noise is occurring when HDCP is restarted.

I received a guideline from Amlogic on how to solve this issue.
===========================================================================
void DisplayMode::setSourceOutputMode(const char* outputmode, output_mode_state state) {
    char value[MAX_STR_LEN] = {0};

    bool cvbsMode = false;
    char tmpMode[MODE_LEN] = {0};

    //Vas added to control HDMI output
    if (!strcmp(outputmode, "displayon")) {
        pSysWrite->writeSysfs(DISPLAY_HDMI_STOP_HPD, "0");
        pSysWrite->writeSysfs(DISPLAY_HDMI_PHY, "1");
        usleep(20000);
        pSysWrite->writeSysfs(DISPLAY_HDMI_AUDIO_MUTE, "1");
        pSysWrite->writeSysfs(DISPLAY_HDMI_AUDIO_MUTE, "0");
        usleep(20000);
        pSysWrite->writeSysfs(DISPLAY_HDMI_AVMUTE, "-1"); <==== there is a problem with this code. AV is being outputted at here
        char hpd_state[MAX_STR_LEN] = {0};

        pSysWrite->readSysfs(DISPLAY_HPD_STATE, hpd_state);
        if (!strncmp(hpd_state, "1", 1)) {
            pTxAuth->start(); <============================= HDCP start
        } else {
            SYS_LOGI("HPD is low. There is nothing to do for HDCP");
        }
        return;
..
================================================================

Please remove or modify the code that turns off AVMUTE even though HDCP is not completed.
Of course, side effects should not occur.
Additionally, we do not have an environment in which we can reproduce this issue.

if you don't understand this, please contact me or Brent.
Thank you
YK.Jung

(ALTech) Younkwang Jung

2021-09-30 10:46

developer   ~0008340

Hi

This issue is fixed at https://jira.skbroadband.com/browse/BTVV-2808

Thank you
YK.Jung

Issue History

Date Modified Username Field Change
2021-06-10 18:00 (ALTech) Younkwang Jung New Issue
2021-06-10 18:00 (ALTech) Younkwang Jung Status new => assigned
2021-06-10 18:00 (ALTech) Younkwang Jung Assigned To => (SW) Kerwin Chen
2021-06-10 18:00 (ALTech) Younkwang Jung File Added: ME0035_20210608_d4_1b_81_fe_89_86_Smart3(BFX-AT100)_tv_noise.zip
2021-06-10 18:01 (ALTech) Younkwang Jung Issue Monitored: (SW) Brent Choi
2021-06-10 18:01 (ALTech) Younkwang Jung Issue Monitored: (ALTech) SY Yoon
2021-06-15 12:05 (SW) Peter Chen File Added: hdcp_normal.log
2021-06-15 12:05 (SW) Peter Chen Note Added: 0007463
2021-06-15 12:06 (SW) Peter Chen Assigned To (SW) Kerwin Chen => (ALTech) Younkwang Jung
2021-06-15 12:06 (SW) Peter Chen Description Updated View Revisions
2021-07-05 13:10 (ALTech) Younkwang Jung Note Added: 0007603
2021-07-05 13:10 (ALTech) Younkwang Jung Note Edited: 0007603 View Revisions
2021-09-30 10:46 (ALTech) Younkwang Jung Note Added: 0008340
2021-09-30 10:47 (ALTech) Younkwang Jung Status assigned => closed
2021-09-30 10:47 (ALTech) Younkwang Jung Resolution open => fixed