HDMI Sound glitch every 3 sec on Orange PI PC Plus

sannee

Hello Everyone.

I connected my Orange Pi PC Plus  to my TV via HDMI, but i hear some sound pulse (about 50 ms)  every 3 secs when try to listen music or watch TV.  
Details:
1) Operation System: Latest Armbian (Legacy Kernel)
2) My TV has 1360x768 resolution. This resolution was added manually to sunxi hdmi driver using details that i got from EDID of my TV:

1. 
   
2. Monitor
   
3.   Model name............... CVTE TV
   
4.   Manufacturer............. CVT Electronics
   
5.   Plug and Play ID......... CVT0003
   
6.   Serial number............ n/a
   
7.   Manufacture date......... 2010, ISO week 16
   
8.   Filter driver............ None
   
9.   -------------------------
   
10.   EDID revision............ 1.3
    
11.   Input signal type........ Digital
    
12.   Color bit depth.......... Undefined
    
13.   Display type............. RGB color
    
14.   Screen size.............. 1000 x 610 mm (46,1 in)
    
15.   Power management......... Standby
    
16.   Extension blocs.......... 1 (CEA/CTA-EXT)
    
17.   -------------------------
    
18.   DDC/CI................... Not supported
    
19. 
    
20. Color characteristics
    
21.   Default color space...... Non-sRGB
    
22.   Display gamma............ 1,00
    
23.   Red chromaticity......... Rx 0,640 - Ry 0,330
    
24.   Green chromaticity....... Gx 0,300 - Gy 0,600
    
25.   Blue chromaticity........ Bx 0,150 - By 0,060
    
26.   White point (default).... Wx 0,313 - Wy 0,329
    
27.   Additional descriptors... None
    
28. 
    
29. Timing characteristics
    
30.   Horizontal scan range.... 15-80kHz
    
31.   Vertical scan range...... 24-85Hz
    
32.   Video bandwidth.......... 160MHz
    
33.   CVT standard............. Not supported
    
34.   GTF standard............. Not supported
    
35.   Additional descriptors... None
    
36.   Preferred timing......... Yes
    
37.   Native/preferred timing.. 1360x768p at 60Hz (16:9)
    
38.     Modeline............... "1360x768" 85,500 1360 1424 1536 1792 768 771 777 795 +hsync +vsync
    
39. 
    
40. Standard timings supported
    
41.      720 x  400p at  70Hz - IBM VGA
    
42.      640 x  480p at  60Hz - IBM VGA
    
43.      640 x  480p at  75Hz - VESA
    
44.      800 x  600p at  60Hz - VESA
    
45.      800 x  600p at  75Hz - VESA
    
46.     1024 x  768p at  60Hz - VESA
    
47.     1024 x  768p at  70Hz - VESA
    
48.     1024 x  768p at  75Hz - VESA
    
49. 
    
50. EIA/CEA/CTA-861 Information
    
51.   Revision number.......... 3
    
52.   IT underscan............. Not supported
    
53.   Basic audio.............. Supported
    
54.   YCbCr 4:4:4.............. Supported
    
55.   YCbCr 4:2:2.............. Supported
    
56.   Native formats........... 4
    
57.   Detailed timing #1....... 1280x720p at 50Hz (16:9)
    
58.     Modeline............... "1280x720" 74,250 1280 1720 1760 1980 720 725 730 750 +hsync +vsync
    
59.   Detailed timing #2....... 1920x1080i at 50Hz (16:9)
    
60.     Modeline............... "1920x1080" 74,250 1920 2448 2492 2640 1080 1084 1094 1124 interlace +hsync +vsync
    
61.   Detailed timing #3....... 720x480p at 60Hz (4:3)
    
62.     Modeline............... "720x480" 27,000 720 736 798 858 480 489 495 525 -hsync -vsync
    
63.   Detailed timing #4....... 720x576p at 50Hz (4:3)
    
64.     Modeline............... "720x576" 27,000 720 732 796 864 576 581 586 625 -hsync -vsync
    
65. 
    
66. CE video identifiers (VICs) - timing/formats supported
    
67.     1920 x 1080p at  60Hz - HDTV (16:9, 1:1) [Native]
    
68.     1920 x 1080i at  60Hz - HDTV (16:9, 1:1)
    
69.     1280 x  720p at  60Hz - HDTV (16:9, 1:1)
    
70.      720 x  480p at  60Hz - EDTV (16:9, 32:27)
    
71.      720 x  480i at  60Hz - Doublescan (16:9, 32:27)
    
72.      720 x  480p at  60Hz - EDTV (4:3, 8:9)
    
73.      720 x  480i at  60Hz - Doublescan (4:3, 8:9)
    
74.      640 x  480p at  60Hz - Default (4:3, 1:1)
    
75.     1920 x 1080p at  50Hz - HDTV (16:9, 1:1)
    
76.     1920 x 1080i at  50Hz - HDTV (16:9, 1:1)
    
77.     1280 x  720p at  50Hz - HDTV (16:9, 1:1)
    
78.      720 x  576p at  50Hz - EDTV (16:9, 64:45)
    
79.      720 x  576i at  50Hz - Doublescan (16:9, 64:45)
    
80.      720 x  576p at  50Hz - EDTV (4:3, 16:15)
    
81.      720 x  576i at  50Hz - Doublescan (4:3, 16:15)
    
82.     NB: NTSC refresh rate = (Hz*1000)/1001
    
83. 
    
84. CE audio data (formats supported)
    
85.   LPCM    2-channel, 16/20 bit depths    at 32/44/48 kHz
    
86. 
    
87. CE speaker allocation data
    
88.   Channel configuration.... 2.0
    
89.   Front left/right......... Yes
    
90.   Front LFE................ No
    
91.   Front center............. No
    
92.   Rear left/right.......... No
    
93.   Rear center.............. No
    
94.   Front left/right center.. No
    
95.   Rear left/right center... No
    
96.   Rear LFE................. No
    
97. 
    
98. CE vendor specific data (VSDB)
    
99.   IEEE registration number. 0x000C03
    
100.   CEC physical address..... 3.0.0.0
     
101.   Supports AI (ACP, ISRC).. Yes
     
102.   Supports 48bpp........... No
     
103.   Supports 36bpp........... No
     
104.   Supports 30bpp........... No
     
105.   Supports YCbCr 4:4:4..... No
     
106.   Supports dual-link DVI... No
     
107.   Maximum TMDS clock....... 165MHz
     
108. 
     
109. Report information
     
110.   Date generated........... 12.05.2019
     
111.   Software revision........ 2.91.0.1043
     
112.   Data source.............. Real-time 0x0041
     
113.   Operating system......... 10.0.17134.2
     
114. 
     
115. Raw data
     
116.   00,FF,FF,FF,FF,FF,FF,00,0E,D4,03,00,00,00,00,00,10,14,01,03,80,64,3D,00,8A,EE,95,A3,54,4C,99,26,
     
117.   0F,50,54,A5,4E,00,01,01,01,01,01,01,01,01,01,01,01,01,01,01,01,01,66,21,50,B0,51,00,1B,30,40,70,
     
118.   36,00,3F,43,21,00,00,1E,00,00,00,FD,00,18,55,0F,50,10,00,0A,20,20,20,20,20,20,00,00,00,FC,00,43,
     
119.   56,54,45,20,54,56,0A,20,20,20,20,20,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,01,03,
     
120.   02,03,23,74,4F,90,05,04,03,07,02,06,01,1F,14,13,12,16,11,15,23,09,07,03,83,01,00,00,66,03,0C,00,
     
121.   30,00,80,01,1D,00,BC,52,D0,1E,20,B8,28,55,40,C4,8E,21,00,00,1E,01,1D,80,D0,72,1C,16,20,10,2C,25,
     
122.   80,C4,8E,21,00,00,9E,8C,0A,D0,8A,20,E0,2D,10,10,3E,96,00,13,8E,21,00,00,18,8C,0A,D0,90,20,40,31,
     
123.   20,0C,40,55,00,13,8E,21,00,00,18,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,85

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So, preferred modeline is next for my TV: "1360x768" 85,500 1360 1424 1536 1792 768 771 777 795 +hsync +vsync:
Name - "1360x768"
Pixel Clock = 85.50
HRes = 1360
HSyncStart = 1424
HSyncEnd = 1536
HTotal = 1792
VRes = 768
VSyncStart = 771
VSyncEnd = 777
VTotal = 795
H Polarity = +
V Polarity = +



After calculations, i got next video timings (disp_video_timings structure):

vic = HDMI1360_768P;
tv_mode = 0;
pixel_clk = 85500000;
pixel_repeat = 0;
x_res = 1360;
y_res = 768;
hor_total_time =1792;
hor_back_porch = HTotal - HSyncEnd = 256;
hor_front_porch = HSyncStart - HRes = 64;
hor_sync_time = HSyncEnd - HSyncStart = 112;
ver_total_time = 795;
ver_back_porch = VTotal - VSyncEnd = 18;
ver_front_porch = VSyncStart - VRes = 3;
ver_sync_time = VSyncEnd - VSyncStart = 6;
hor_sync_polarity = 1;
ver_sync_polarity = 1;
b_interlace = 0;
vactive_space = 0;
trd_mode = 0;



So, i used these values to patch hdmi_core (the patch is attached). I think i did everything correct.
But then i'm not sure why i hear sound glitch every 3 secs on my Orange Pi only when my own added resolution is used.
Is it software or hardware issue ? There are no any issues with other resolutions, but my TV only supports 1360x768 resolution well, so I need to get the issue fixed.
Did someone face same issue ?

Thanks for any reply.

sannee

pll_video = 342

sannee

Okay, never mind

Finally I resolved the issue with hdmi sound. I got all required HDMI parameters using u-boot-h3-video-helper.bin loader from here: https://github.com/armbian/build/issues/594
After that I updated my patch with actual values and then rebuilt armbian kernel. And it fixed the issue  this time I'm happy now. Thank you to jernejsk (developer) and maximilliangreat (who re-attached the file) !

Thanks,
Alex.

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