I’m trying to connect my BeagleBone Enhanced Wi-Fi to my Vizio E55 tv using the HDMI.
I know it can be painful, but I have patience =)
It seems that the TV does not send an EDID or the board can’t read it because I see:
[ 10.434908] tda998x 0-0070: read edid timeout
[ 10.435360] tda998x 0-0070: failed to read EDID
in dmesg, and nothing on the screen whatsoever.
I tried to uncomment the cmdline with “video= …” in /boot/uEnv.txt which has the message about “edid real failures” (btw, I was a bit confused by that ‘real’…should it be ‘read’?), but nothing changed.
I then obtained the EDID binary blob by plugging my laptop to the tv, and I put it into /lib/firmware/edid/vizioedid.bin. I added “drm.edid_firmware=edid/vizioedid.bin” to the cmdline in /boot/uEnv.txt and tried rebooting. Still blank screen, and now I see the following in dmesg:
[ 10.326019] platform HDMI-A-1: Direct firmware load for edid/vizioedid.bin failed with error -2
[ 10.326183] [drm:drm_load_edid_firmware] *ERROR* Requesting EDID firmware "edid/vizioedid.bin" failed (err=-2)
[ 10.434908] tda998x 0-0070: read edid timeout
[ 10.435360] tda998x 0-0070: failed to read EDID
[ 10.435925] platform HDMI-A-1: Direct firmware load for edid/vizioedid.bin failed with error -2
[ 10.436069] [drm:drm_load_edid_firmware] *ERROR* Requesting EDID firmware "edid/vizioedid.bin" failed (err=-2)
but sometimes I also see the following later in dmesg:
[ 49.327156] [drm] Got external EDID base block and 1 extension from "edid/vizioedid.bin" for conne
ctor "HDMI-A-1"
[ 49.340765] [drm] Got external EDID base block and 1 extension from "edid/vizioedid.bin" for connector "HDMI-A-1"
These two messages are repeated throughout dmesg multiple times…but not at every boot! Sometimes they show up, sometimes they don’t and I can’t tell what makes them do that. In any case, still a blank screen.
Now, this weirdnesses aside, is the loading of an edid blob expected to at least work by editing the cmdline, even if it does not result in a working hdmi output?
Note that the edid blob seems to be fine, from what I can understand:
parse-edid gives:
Section "Monitor"
Identifier "E550i-C2"
ModelName "E550i-C2"
VendorName "VIZ"
# Monitor Manufactured week 10 of 2015
# EDID version 1.3
# Digital Display
DisplaySize 930 520
Gamma 2.20
Option "DPMS" "false"
Horizsync 30-70
VertRefresh 50-75
# Maximum pixel clock is 150MHz
#Not giving standard mode: 1280x1024, 60Hz
#Not giving standard mode: 1440x900, 60Hz
#Not giving standard mode: 1680x1050, 60Hz
#Extension block found. Parsing...
Modeline "Mode 17" +hsync -vsync
Modeline "Mode 0" +hsync +vsync
Modeline "Mode 1" -hsync +vsync
Modeline "Mode 2" 27.027 720 736 798 858 480 489 495 525 -hsync -vsync
Modeline "Mode 3" 27.027 720 736 798 858 480 489 495 525 -hsync -vsync
Modeline "Mode 4" 74.250 1280 1390 1420 1650 720 725 730 750 +hsync +vsync
Modeline "Mode 5" 74.250 1920 2008 2052 2200 1080 1082 1087 1125 +hsync +vsync interlace
Modeline "Mode 6" 27.027 1440 1478 1602 1716 480 484 487 525 -hsync -vsync interlace
Modeline "Mode 7" 27.027 1440 1478 1602 1716 480 484 487 525 -hsync -vsync interlace
Modeline "Mode 8" 148.500 1920 2008 2052 2200 1080 1084 1089 1125 +hsync +vsync
Modeline "Mode 9" 74.250 1280 1720 1760 1980 720 725 730 750 +hsync +vsync
Modeline "Mode 10" 74.250 1920 2448 2492 2640 1080 1082 1089 1125 +hsync +vsync interlace
Modeline "Mode 11" 148.500 1920 2448 2492 2640 1080 1084 1089 1125 +hsync +vsync
Modeline "Mode 12" 74.250 1920 2558 2602 2750 1080 1084 1089 1125 +hsync +vsync
Modeline "Mode 13" 74.250 1920 2008 2052 2200 1080 1084 1089 1125 +hsync +vsync
Modeline "Mode 14" 25.200 640 656 752 800 480 490 492 525 -hsync -vsync
Modeline "Mode 15" 27.000 720 732 796 864 576 581 586 625 -hsync -vsync
Modeline "Mode 16" 27.000 720 732 796 864 576 581 586 625 -hsync -vsync
Modeline "Mode 18" +hsync +vsync interlace
Modeline "Mode 19" -hsync -vsync
Modeline "Mode 20" +hsync +vsync
Option "PreferredMode" "Mode 17"
EndSection
and edid-decode gives:
edid-decode (hex):
00 ff ff ff ff ff ff 00 59 3a 04 10 01 01 01 01
0a 19 01 03 80 5d 34 78 0a e6 9d a3 54 4a 99 26
0f 47 4a a1 08 00 81 80 95 00 b3 00 01 01 01 01
01 01 01 01 01 01 02 3a 80 18 71 38 2d 40 58 2c
45 00 a2 08 32 00 00 1e 0e 1f 00 80 51 00 1e 30
40 80 37 00 dd 0c 11 00 00 1c 00 00 00 fd 00 32
4b 1e 46 0f 00 0a 20 20 20 20 20 20 00 00 00 fc
00 45 35 35 30 69 2d 43 32 0a 20 20 20 20 01 54
02 03 2c 71 4f 02 03 04 05 06 07 90 13 14 1f 20
22 01 11 12 26 09 07 07 15 07 50 83 01 00 00 6c
03 0c 00 30 00 38 2d c0 02 02 02 02 01 1d 00 72
51 d0 1e 20 6e 28 55 00 9a e6 10 00 00 1a 01 1d
80 18 71 1c 16 20 58 2c 25 00 9a e6 10 00 00 9e
8c 0a d0 8a 20 e0 2d 10 10 3a 96 00 9a e6 10 00
00 18 02 3a 80 18 71 38 2d 40 58 2c 45 00 9a e6
10 00 00 1e 00 00 00 00 00 00 00 00 00 00 00 c9
Block 0, Base EDID:
EDID Structure Version & Revision: 1.3
Vendor & Product Identification:
Manufacturer: VIZ
Model: 4100
Serial Number: 16843009
Made in: week 10 of 2015
Basic Display Parameters & Features:
Digital display
Maximum image size: 93 cm x 52 cm
Gamma: 2.20
RGB color display
First detailed timing is the preferred timing
Color Characteristics:
Red : 0.6396, 0.3300
Green: 0.2900, 0.5996
Blue : 0.1503, 0.0595
White: 0.2802, 0.2900
Established Timings I & II:
IBM : 720x400 70.081663 Hz 9:5 31.467 kHz 28.320000 MHz
DMT 0x04: 640x480 59.940476 Hz 4:3 31.469 kHz 25.175000 MHz
DMT 0x09: 800x600 60.316541 Hz 4:3 37.879 kHz 40.000000 MHz
DMT 0x10: 1024x768 60.003840 Hz 4:3 48.363 kHz 65.000000 MHz
Standard Timings:
DMT 0x23: 1280x1024 60.019740 Hz 5:4 63.981 kHz 108.000000 MHz
DMT 0x2f: 1440x900 59.887445 Hz 16:10 55.935 kHz 106.500000 MHz
DMT 0x3a: 1680x1050 59.954250 Hz 16:10 65.290 kHz 146.250000 MHz
Detailed Timing Descriptors:
DTD 1: 1920x1080 60.000000 Hz 16:9 67.500 kHz 148.500000 MHz (930 mm x 520 mm)
Hfront 88 Hsync 44 Hback 148 Hpol P
Vfront 4 Vsync 5 Vback 36 Vpol P
DTD 2: 1280x768 59.870228 Hz 5:3 47.776 kHz 79.500000 MHz (477 mm x 268 mm)
Hfront 64 Hsync 128 Hback 192 Hpol N
Vfront 3 Vsync 7 Vback 20 Vpol P
Display Range Limits:
Monitor ranges (GTF): 50-75 Hz V, 30-70 kHz H, max dotclock 150 MHz
Display Product Name: 'E550i-C2'
Extension blocks: 1
Checksum: 0x54
Block 1, CTA-861 Extension Block:
Revision: 3
Basic audio support
Supports YCbCr 4:4:4
Supports YCbCr 4:2:2
Native detailed modes: 1
Video Data Block:
VIC 2: 720x480 59.940060 Hz 4:3 31.469 kHz 27.000000 MHz
VIC 3: 720x480 59.940060 Hz 16:9 31.469 kHz 27.000000 MHz
VIC 4: 1280x720 60.000000 Hz 16:9 45.000 kHz 74.250000 MHz
VIC 5: 1920x1080i 60.000000 Hz 16:9 33.750 kHz 74.250000 MHz
VIC 6: 1440x480i 59.940060 Hz 4:3 15.734 kHz 27.000000 MHz
VIC 7: 1440x480i 59.940060 Hz 16:9 15.734 kHz 27.000000 MHz
VIC 16: 1920x1080 60.000000 Hz 16:9 67.500 kHz 148.500000 MHz (native)
VIC 19: 1280x720 50.000000 Hz 16:9 37.500 kHz 74.250000 MHz
VIC 20: 1920x1080i 50.000000 Hz 16:9 28.125 kHz 74.250000 MHz
VIC 31: 1920x1080 50.000000 Hz 16:9 56.250 kHz 148.500000 MHz
VIC 32: 1920x1080 24.000000 Hz 16:9 27.000 kHz 74.250000 MHz
VIC 34: 1920x1080 30.000000 Hz 16:9 33.750 kHz 74.250000 MHz
VIC 1: 640x480 59.940476 Hz 4:3 31.469 kHz 25.175000 MHz
VIC 17: 720x576 50.000000 Hz 4:3 31.250 kHz 27.000000 MHz
VIC 18: 720x576 50.000000 Hz 16:9 31.250 kHz 27.000000 MHz
Audio Data Block:
Linear PCM:
Max channels: 2
Supported sample rates (kHz): 48 44.1 32
Supported sample sizes (bits): 24 20 16
AC-3:
Max channels: 6
Supported sample rates (kHz): 48 44.1 32
Maximum bit rate: 640 kb/s
Speaker Allocation Data Block:
FL/FR - Front Left/Right
Vendor-Specific Data Block (HDMI), OUI 00-0C-03:
Source physical address: 3.0.0.0
DC_36bit
DC_30bit
DC_Y444
Maximum TMDS clock: 225 MHz
Video latency: 5 ms
Audio latency: 5 ms
Interlaced video latency: 5 ms
Interlaced audio latency: 5 ms
Detailed Timing Descriptors:
DTD 3: 1280x720 60.000000 Hz 16:9 45.000 kHz 74.250000 MHz (410 mm x 230 mm)
Hfront 110 Hsync 40 Hback 220 Hpol P
Vfront 5 Vsync 5 Vback 20 Vpol N
DTD 4: 1920x1080i 60.000000 Hz 16:9 33.750 kHz 74.250000 MHz (410 mm x 230 mm)
Hfront 88 Hsync 44 Hback 148 Hpol P
Vfront 2 Vsync 5 Vback 15 Vpol P Vfront +0.5 Odd Field
Vfront 2 Vsync 5 Vback 15 Vpol P Vback +0.5 Even Field
DTD 5: 720x480 59.940060 Hz 3:2 31.469 kHz 27.000000 MHz (410 mm x 230 mm)
Hfront 16 Hsync 58 Hback 64 Hpol N
Vfront 9 Vsync 6 Vback 30 Vpol N
DTD 6: 1920x1080 60.000000 Hz 16:9 67.500 kHz 148.500000 MHz (410 mm x 230 mm)
Hfront 88 Hsync 44 Hback 148 Hpol P
Vfront 4 Vsync 5 Vback 36 Vpol P
Checksum: 0xc9