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PXA26X LCD Controller
- From: Andy Atkinson <andya at hydrix dot com>
- To: ecos-discuss at sources dot redhat dot com
- Date: 05 Oct 2004 09:49:38 +1000
- Subject: [ECOS] PXA26X LCD Controller
- Organization:
Hi All,
We are trying to use the on-chip LCD controller to drive a small
(212x138) FSTN LCD panel. We think we have the DMA registers setup
correctly, yet we consistently get a input buffer underrun reported
whilst transferring the palette data to the controller. Our display is 4
bits-per-pixel so our palette is only 32-bytes (one DMAC burst
transfer). As such we were surprised to see the buffer underrun
occurring.
Just for info, here is some other info:
adjusted pixels per line = 216;
f-buffer size = (216*138*4) / 8;
DMAC address have been aligned correctly;
using 2 DMAC descriptors - one for palette, another for f-buffer;
Does anyone have any thoughts???
Any help appreciated,
Andy Atkinson
andya@hydrix.com
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