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by tomasf
Thu Jun 27, 2019 1:43 pm
Forum: General discussion
Topic: Raspberry Pi 4 Thread - general discussion
Replies: 895
Views: 98022

Re: Raspberry Pi 4 Thread - general discussion

I wonder if the pin muxing isn't right. Please check with "raspi-gpio get" that GPIOs 0-27 are all set to alt2 for the DPI function. You can achieve the same as "dtoverlay=dpi24" by doing "gpio=0-27=a2". Yay! That did it! The screen didn't look quite right with that dpi_timing line, but it turns ou...
by tomasf
Thu Jun 27, 2019 12:59 pm
Forum: General discussion
Topic: Raspberry Pi 4 Thread - general discussion
Replies: 895
Views: 98022

Re: Raspberry Pi 4 Thread - general discussion

So dpi_timing=1024 0 40 104 144 600 1 3 7 14 0 0 0 60 0 49000000 6 should be the equivalent. You can actually do this for yourself. If you use hdmi_cvt= in config.txt, then "vcgencmd hdmi_cvt" or "vcgencmd hdmi_timings" will read back the current values (in the old scheme they also allow you to set...
by tomasf
Wed Jun 26, 2019 9:21 pm
Forum: General discussion
Topic: Raspberry Pi 4 Thread - general discussion
Replies: 895
Views: 98022

Re: Raspberry Pi 4 Thread - general discussion

If not, then running "cvt 1024 600 60" gives the standardised timings for that mode. $ cvt 1024 600 60 # 1024x600 59.85 Hz (CVT) hsync: 37.35 kHz; pclk: 49.00 MHz Modeline "1024x600_60.00" 49.00 1024 1072 1168 1312 600 603 613 624 -hsync +vsync That's not quite in the right format for dpi_timings. ...
by tomasf
Wed Jun 26, 2019 5:46 pm
Forum: General discussion
Topic: Raspberry Pi 4 Thread - general discussion
Replies: 895
Views: 98022

Re: Raspberry Pi 4 Thread - general discussion

Hi, I received my Raspberry Pi 4B today. Seems fantastic so far! One problem I have encountered is getting my DPI display to work. It works great on my 3B+, but it's all black on my 4B. It's one of these: https://www.waveshare.com/wiki/7inch_LCD_for_Pi I'm basically using the configuration lines fro...

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