In this case, a video display framebuffer must be available at the start and for every ISR. I’m still seeing wrong colors, of course. Again, we can’t really help too much here without detailed schematics, and ideally some hardware test with. If you are a TI Employee and require Edit ability please contact x from the company directory. Linux frame buffer driver uses 2 DDR frame buffers as ping pong buffers. Would be nice to get this more automated if we can figure out why it’s not showing up, but again that’s not a show-stopper. It will lead to sync error interrupts and possibly affect system performance.
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If you are a TI Employee and require Edit ability please contact x from the company directory. Linux frame buffer driver uses 2 DDR frame buffers as ping pong buffers. Quite possibly an error on my end.
Added by Otmar Schlunk over 8 years ago. The kernel included in the da8xx-vb kit provided should have the necessary code installed to support either the DVI interface or the LCD panel interface. Application follows below steps:.
[PATCH] davinci: fb: Frame Buffer driver for TI DA8xx/OMAP-L1xx
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. We’re in need of some information on this item because our primary assignment now is to implement our LCD functionality in the unit.
It draws a white box around lcf border of the frame buffer and fills it with 16 bars. This page was last modified on 26 Septemberat C board instead of the ones above.
A few oddities, but I’m now able to at least talk to the frame buffer. At this point, all we really need to do is draw a bitmap to memory and have it show up on the LCD. Each bar is one bit of color, so you should get 5 blue bars, 6 green bars, and 5 red bars.
My logo is grayscale on dq8xx-fb white background, and the background is blue could be blue-green; I didn’t check that closely.
Lce got a true DVI panel hooked to the unit, as required.
Yes, the instructions are involved, but they’re easy enough to follow. I’ll need a little more information about the uboot to be able to have it tell the kernel to initialize the device.
LCD/Display questions – ARM9 Based Platforms – Critical Link Support
Then trim off the first 72 bytes of the file. Hi all, If you have designed da8xx-bf 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.
Not sure why I don’t get any reds.
Software can make use of this register to set the requestor priorities for required EMIF arbitration. Is the text white you may need to poke the blank variable as mentioned above.
fbdev: da8xx-fb: fix videomodes of lcd panels – Patchwork
Test gradient looks fine now, and so does my logo. This table defines the size of the panel as well as the desired pixel clock rate, front and back porches, etc.
Since we’re not getting any red guns, no white pixels. Now we move on to installing the LCD panel the one we got from you and trying to get that working. If you use qt-embedded, it has a translator built in to read png’s, etc. I was quite surprised to discover that my two favorite programs, Photoshop and ImageMagick, both don’t export in that format, and apparently neither does Gimp.
Do you have a specific tool you know about for converting to RGB format? 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.
In this case, a video display framebuffer must be available at the start and for every ISR. Views Read View source View history. So we’ll be using our own FPGA. Yes, actually, we do see a Linux prompt and cursor on that screen. So, now the question is what did I do wrong to cause the frame buffer to be non-readable and non-writable? It will lead to sync error interrupts and possibly affect system performance.