HDMI Sound glitch every 3 sec on Orange PI PC Plus

sannee · Published in 2019-5-13 04:09:01

Edited by sannee at 2019-5-13 04:13

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:

Monitor
Model name............... CVTE TV
Manufacturer............. CVT Electronics
Plug and Play ID......... CVT0003
Serial number............ n/a
Manufacture date......... 2010, ISO week 16
Filter driver............ None
-------------------------
EDID revision............ 1.3
Input signal type........ Digital
Color bit depth.......... Undefined
Display type............. RGB color
Screen size.............. 1000 x 610 mm (46,1 in)
Power management......... Standby
Extension blocs.......... 1 (CEA/CTA-EXT)
-------------------------
DDC/CI................... Not supported
Color characteristics
Default color space...... Non-sRGB
Display gamma............ 1,00
Red chromaticity......... Rx 0,640 - Ry 0,330
Green chromaticity....... Gx 0,300 - Gy 0,600
Blue chromaticity........ Bx 0,150 - By 0,060
White point (default).... Wx 0,313 - Wy 0,329
Additional descriptors... None
Timing characteristics
Horizontal scan range.... 15-80kHz
Vertical scan range...... 24-85Hz
Video bandwidth.......... 160MHz
CVT standard............. Not supported
GTF standard............. Not supported
Additional descriptors... None
Preferred timing......... Yes
Native/preferred timing.. 1360x768p at 60Hz (16:9)
Modeline............... "1360x768" 85,500 1360 1424 1536 1792 768 771 777 795 +hsync +vsync
Standard timings supported
720 x 400p at 70Hz - IBM VGA
640 x 480p at 60Hz - IBM VGA
640 x 480p at 75Hz - VESA
800 x 600p at 60Hz - VESA
800 x 600p at 75Hz - VESA
1024 x 768p at 60Hz - VESA
1024 x 768p at 70Hz - VESA
1024 x 768p at 75Hz - VESA
EIA/CEA/CTA-861 Information
Revision number.......... 3
IT underscan............. Not supported
Basic audio.............. Supported
YCbCr 4:4:4.............. Supported
YCbCr 4:2:2.............. Supported
Native formats........... 4
Detailed timing #1....... 1280x720p at 50Hz (16:9)
Modeline............... "1280x720" 74,250 1280 1720 1760 1980 720 725 730 750 +hsync +vsync
Detailed timing #2....... 1920x1080i at 50Hz (16:9)
Modeline............... "1920x1080" 74,250 1920 2448 2492 2640 1080 1084 1094 1124 interlace +hsync +vsync
Detailed timing #3....... 720x480p at 60Hz (4:3)
Modeline............... "720x480" 27,000 720 736 798 858 480 489 495 525 -hsync -vsync
Detailed timing #4....... 720x576p at 50Hz (4:3)
Modeline............... "720x576" 27,000 720 732 796 864 576 581 586 625 -hsync -vsync
CE video identifiers (VICs) - timing/formats supported
1920 x 1080p at 60Hz - HDTV (16:9, 1:1) [Native]
1920 x 1080i at 60Hz - HDTV (16:9, 1:1)
1280 x 720p at 60Hz - HDTV (16:9, 1:1)
720 x 480p at 60Hz - EDTV (16:9, 32:27)
720 x 480i at 60Hz - Doublescan (16:9, 32:27)
720 x 480p at 60Hz - EDTV (4:3, 8:9)
720 x 480i at 60Hz - Doublescan (4:3, 8:9)
640 x 480p at 60Hz - Default (4:3, 1:1)
1920 x 1080p at 50Hz - HDTV (16:9, 1:1)
1920 x 1080i at 50Hz - HDTV (16:9, 1:1)
1280 x 720p at 50Hz - HDTV (16:9, 1:1)
720 x 576p at 50Hz - EDTV (16:9, 64:45)
720 x 576i at 50Hz - Doublescan (16:9, 64:45)
720 x 576p at 50Hz - EDTV (4:3, 16:15)
720 x 576i at 50Hz - Doublescan (4:3, 16:15)
NB: NTSC refresh rate = (Hz*1000)/1001
CE audio data (formats supported)
LPCM 2-channel, 16/20 bit depths at 32/44/48 kHz
CE speaker allocation data
Channel configuration.... 2.0
Front left/right......... Yes
Front LFE................ No
Front center............. No
Rear left/right.......... No
Rear center.............. No
Front left/right center.. No
Rear left/right center... No
Rear LFE................. No
CE vendor specific data (VSDB)
IEEE registration number. 0x000C03
CEC physical address..... 3.0.0.0
Supports AI (ACP, ISRC).. Yes
Supports 48bpp........... No
Supports 36bpp........... No
Supports 30bpp........... No
Supports YCbCr 4:4:4..... No
Supports dual-link DVI... No
Maximum TMDS clock....... 165MHz
Report information
Date generated........... 12.05.2019
Software revision........ 2.91.0.1043
Data source.............. Real-time 0x0041
Operating system......... 10.0.17134.2
Raw data
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,
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,
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,
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,
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,
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,
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,
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 · Published in 2019-5-15 00:17:31

pll_video = 342

sannee · Published in 2019-5-17 09:11:10

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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HDMI Sound glitch every 3 sec on Orange PI PC Plus

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