Difference between revisions of "HBW test/test"

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(set matched device tree overlay (dtbo) in U-Boot)
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saveenv
 
saveenv
 
reset
 
reset
 +
</syntaxhighlight>
 +
 +
== Appendix ==
 +
=== fetch pre-set EDID ===
 +
<syntaxhighlight lang="bash">
 +
EDID=2
 +
sudo i2cset -f -y 2 0x20 0x85 $EDID b
 +
for DA in `seq 0 0x10 0x70`; do
 +
  sudo i2cget -f -y 2 0x20 $DA i 0x10
 +
done | xxd -r -p  > EDID_$EDID.bin
 
</syntaxhighlight>
 
</syntaxhighlight>

Revision as of 09:10, 2 January 2024


Prerequisites

  • PTN3460 Programming Guide
  • EDID config (128 bytes) to the new LVDS panel
  • i2c-tools installed
sudo apt update
sudo apt install i2c-tools

(use EDID 6 and panel, G070VW01V0, as example below)

Convert EDID config to shell script

On Ubuntu

EDIDNEW=6 # set EDID
EDIDBIN=g070vw01v0.bin
SCRIPT=~/set_edid_${EDIDNEW}.sh

REG81=$(printf "0x%02x" 0) # Please refer to the PTN3460 Programming Guide to set correct value
REG84=$(printf "0x%02x" $((2*EDIDNEW + 1)))
REG85=$(printf "0x%02x" $EDIDNEW)
echo -e "REG81:$REG81\nREG84:$REG84\nREG85:$REG85\n"

cat << EOT > $SCRIPT
#!/bin/bash
i2cset -f -y 2 0x20 0x85 $REG85 b

$(
xxd -c 16 -ps $EDIDBIN | 
sed "s/../0x& /g; s/ *$//" | 
for ADDR in `seq 0x00 0x10 0x70`; do
  read 
  echo i2cset -f -y 2 0x20 `printf "0x%02x" $ADDR` $REPLY i
done
)

i2cset -f -y 2 0x20 0x81 $REG81 b
i2cset -f -y 2 0x20 0x84 $REG84 b
i2cset -f -y 2 0x20 0xe8 0x01 0x78 0x45 0x56 i
EOT

chmod +x $SCRIPT

run the script and reboot

sudo $SCRIPT
sudo reboot

Set matched device tree overlay (dtbo) in U-Boot

On U-Boot

Press any key to stop auto boot

  • Multi-display (HDMI + LVDS)
The LVDS is always major display that has nothing to do with the specified order.
setenv DISPLAY hdmi.dtbo lvds6.dtbo
saveenv
reset
  • LVDS only
setenv DISPLAY lvds6.dtbo
saveenv
reset

Appendix

fetch pre-set EDID

EDID=2
sudo i2cset -f -y 2 0x20 0x85 $EDID b
for DA in `seq 0 0x10 0x70`; do
  sudo i2cget -f -y 2 0x20 $DA i 0x10
done | xxd -r -p  > EDID_$EDID.bin