I can write something myself very easily, but thought I’d ask if you already know of something. All the files show up at the bottom of the wiki. I’ll look at making another entry. Having 3 user DDR buffers will also solve the issue. It’s just vertical blue stripes, but clearly something is driving a signal out to the display.

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Retrieved from ” http: What I mean is that the pixels are in the right places. Then trim off the first 72 bytes of the file.

[PATCH] davinci: fb: Frame Buffer driver for TI DA8xx/OMAP-L1xx

Not sure why I don’t get any reds. In the linux kernel, you will need to modify the following 2 files: Can you please confirm the revision of your board B, or C?

Text is blue and the penguin at the upper left is blue and green. The compile command line is in the file lccd comment. Unfortunately, it gives me “Operation not permitted” errors whenever I try to read or write the device, so although it’s there I can’t change the image.

Two frames, B0 and B1, are needed at the start as shown in below figure. Views Read View source View history. Currently entering to this condition is narrowed down smallest possible extent by disabling system wide interrupts.


Say the Host CPU updates only the base register and has not had a chance to update the ceiling register da8xxx-fb the DMA engine does the read. Overview Activity News Wiki Forums. I assume it’s in there somewhere, but please confirm for me.

fbdev: da8xx-fb: fix videomodes of lcd panels [Linux 3.10.102]

Linux frame buffer driver uses 2 DDR frame buffers as ping pong buffers. That seems to have gotten the low-level hardware to recognize things, since the U-Boot startup now says something like “configured LCD: If not, can you tell me how to create them? That is we could be updating in host CPU dq8xx-fb out region. I’m guessing that there’s another step needed, at the Linux level.

Are we setting some environment variable here? The screen is all blue and green. I’ll look at making another entry. After you are up and running, could you please run a i2cdump -y 2 0x38 and post or email me the results?

From Texas Instruments Wiki.

LCD/Display questions – ARM9 Based Platforms – Critical Link Support

This page has been accessed 6, times. Will I need separate instructions for creating the fb0 device for that component? BTW, we figured out how to do the bitmaps.


Now we move on to installing the LCD panel the one we got from you and trying to get that working.

I’m still seeing wrong colors, of course. Schlunk, The kernel included in the development kit provided should have the necessary code installed to support either the DVI interface or the LCD panel interface. Also describes da8xxf-b cause and its solution.

Linux source code: drivers/video/da8xx-fb.c (v) – Bootlin

Meanwhile, the DMA uses the current values of those registers for the next frame immediately after firing the interrupt. You’ll need to contact Tom Catalino or someone in sales for details about that.

I’m researching that now and will post here again if I find it before someone else does. If you have designed your own hardware using a new LCD, I’m afraid you’re going to be on your own to get it functioning unless you can provide schematics, your FPGA code, and some hardware for us to support you with.