Subject: [PATCH 1/2] s3c24xx: DMA: don't use autoreload feature

From: [email-masked] (Vasily Khoruzhick)
Date: Fri, 27 Aug 2010 23:03:01 +0300

? ????????? ?? 18 ??????? 2010 18:04:25 ????? Vasily Khoruzhick ???????:
> Some integrated DMA-capable hardware doesn't like autoreload
> feature of s3c24xx DMA-engine, that's why s3cmci driver
> didn't work with DMA transfers enabled.
> 
> I rewrote DMA driver not to use autoreload feature and removed
> all pre-loading features. Buffer re-load is fast enought to perform
> it in IRQ handler, and anyway I don't see any reason to waste CPU
> cycles on waiting for buffer load. Driver is much simplier now,
> it was tested with s3cmci and s3c24xx-i2s drivers on s3c2442 and
> s3c2410 SoCs and works just nice.
 
Patch has problem with suspend/resume (chan->dcon is clobbered by
dma_sel->select())

Will resend fixed version soon.

Regards
Vasily
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