2/5] musb: use system DMA to fix Inventra
DMA issue on RTL-1.4
Hi,
Subject: RE: [PATCH 2/5] musb: use system DMA to fix Inventra
DMA issue
on
RTL-1.4
Felipe,
Another approach to use PIO mode in opposite direction would
increase
the
cpu loading and thus using system DMA
Hi,
Another approach to use PIO mode in opposite direction would
increase
the
cpu loading and thus using system DMA is preferred workaround.
Signed-off-by: Anand Gadiyar gadi...@ti.com
Signed-off-by: Ajay Kumar Gupta ajay.gu...@ti.com
I think falling back to pio is
MUSB RTL version 1.4 has a hardware issue when TX and RX DMA channels are
simultaneously enabled which results in DMA lockup.
Use system DMA for all RX channels as a workaround of this issue as this
will have minimal throughput overhead based on the fact that Rx transfers
are done in DMA mode-0
On Wed, May 12, 2010 at 05:19:36PM +0530, Ajay Kumar Gupta wrote:
MUSB RTL version 1.4 has a hardware issue when TX and RX DMA channels are
simultaneously enabled which results in DMA lockup.
I've seen it on rtl1.8 also if I remember correctly.
Use system DMA for all RX channels as a
Felipe Balbi wrote:
On Wed, May 12, 2010 at 05:19:36PM +0530, Ajay Kumar Gupta wrote:
MUSB RTL version 1.4 has a hardware issue when TX and RX DMA channels are
simultaneously enabled which results in DMA lockup.
I've seen it on rtl1.8 also if I remember correctly.
I'm fairly certain
Hi,
Subject: RE: [PATCH 2/5] musb: use system DMA to fix Inventra DMA issue on
RTL-1.4
Felipe Balbi wrote:
On Wed, May 12, 2010 at 05:19:36PM +0530, Ajay Kumar Gupta wrote:
MUSB RTL version 1.4 has a hardware issue when TX and RX DMA channels
are
simultaneously enabled which results
