Discrepancy on CrowPi2 specific statements in the config.txt file

[Pearl-852]

I have found discrepancy on the CrowPi2 specific statements in the config.txt file.

hdmi_force_hotplug=1
max_usb_current=1    <-- This is now deprecated, see note 1 below
hdmi_group=2
hdmi_mode=87
hdmi_cvt 1920 1080 60 6 0 0 0    <-- This specify the aspect ratio = 15:9
hdmi_drive=2
enable_uart=1
gpio=0=op,dl

Note 1: max_usb_current command reference is here.

In addition, I would recommend to add a conditional filter [EDID=*] to keep the CrowPi2 specific statements effective only when using in the CrowPi2.

1. Open a terminal and run tvservice -n to view the EDID name of the CrowPi2 Display

$ tvservice -n
device_name=RTK-RTK_FHD

2. Revise the config.txt file content adding the [EDID=*] filter as shown below

[EDID=RTK-RTK_FHD]
hdmi_force_hotplug=1
hdmi_group=2
hdmi_mode=87
hdmi_cvt=1920 1080 60 3 0 0 0
hdmi_drive=2
enable_uart=1
gpio=0=op,dl
[all]

Note 2: The max_usb_current and hdmi_cvt statements are removed and revised respectively.

3. Should you (Elecrow) choose to accept my recommended changes, please update your instructions here also.

[Pearl-852]

Further checking on the supported video modes for the CrowPi2 Display as shown below

$ tvservice -m CEA
Group CEA has 16 modes:
           mode 1: 640x480 @ 60Hz 4:3, clock:25MHz progressive 
           mode 2: 720x480 @ 60Hz 4:3, clock:27MHz progressive 
           mode 3: 720x480 @ 60Hz 16:9, clock:27MHz progressive 
           mode 4: 1280x720 @ 60Hz 16:9, clock:74MHz progressive 
           mode 5: 1920x1080 @ 60Hz 16:9, clock:74MHz interlaced 
           mode 6: 720x480 @ 60Hz 4:3, clock:27MHz x2 interlaced 
           mode 7: 720x480 @ 60Hz 16:9, clock:27MHz x2 interlaced 
  (native) mode 16: 1920x1080 @ 60Hz 16:9, clock:148MHz progressive 
           mode 17: 720x576 @ 50Hz 4:3, clock:27MHz progressive 
           mode 18: 720x576 @ 50Hz 16:9, clock:27MHz progressive 
           mode 19: 1280x720 @ 50Hz 16:9, clock:74MHz progressive 
           mode 20: 1920x1080 @ 50Hz 16:9, clock:74MHz interlaced 
           mode 21: 720x576 @ 50Hz 4:3, clock:27MHz x2 interlaced 
           mode 22: 720x576 @ 50Hz 16:9, clock:27MHz x2 interlaced 
           mode 31: 1920x1080 @ 50Hz 16:9, clock:148MHz progressive 
           mode 32: 1920x1080 @ 24Hz 16:9, clock:74MHz progressive 

$ tvservice -m DMT
Group DMT has 11 modes:
           mode 4: 640x480 @ 60Hz 4:3, clock:25MHz progressive 
           mode 6: 640x480 @ 75Hz 4:3, clock:31MHz progressive 
           mode 9: 800x600 @ 60Hz 4:3, clock:40MHz progressive 
           mode 11: 800x600 @ 75Hz 4:3, clock:49MHz progressive 
           mode 16: 1024x768 @ 60Hz 4:3, clock:65MHz progressive 
           mode 18: 1024x768 @ 75Hz 4:3, clock:78MHz progressive 
           mode 21: 1152x864 @ 75Hz 4:3, clock:108MHz progressive 
           mode 35: 1280x1024 @ 60Hz 5:4, clock:108MHz progressive 
           mode 36: 1280x1024 @ 75Hz 5:4, clock:135MHz progressive 
           mode 51: 1600x1200 @ 60Hz 4:3, clock:162MHz progressive 
  (prefer) mode 82: 1920x1080 @ 60Hz 16:9, clock:148MHz progressive 

It would be safe to define hdmi_group=2 and hdmi_mode=82 in the config.txt file, as it is being reported as the preferred video mode. Rather than to define a custom CVT mode.

Revised config.txt file content:

[EDID=RTK-RTK_FHD]
hdmi_force_hotplug=1
hdmi_group=2
hdmi_mode=82
hdmi_drive=2
enable_uart=1
gpio=0=op,dl
[all]