From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paul Mundt Date: Fri, 24 Jun 2011 08:55:52 +0000 Subject: Re: [PATCH/RFC] dma: shdma: transfer based runtime PM Message-Id: <20110624085551.GA26516@linux-sh.org> List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-sh@vger.kernel.org On Wed, Jun 01, 2011 at 09:20:34AM +0200, Guennadi Liakhovetski wrote: > Currently the shdma dmaengine driver uses runtime PM to save power, when > no channel on the specific controller is requested by a user. This patch > switches the driver to count individual DMA transfers. That way the > controller can be powered down between transfers, even if some of its > channels are in use. > > Signed-off-by: Guennadi Liakhovetski > --- > > I marked this an RFC, because it might make sense to first test it with > Rafael's upcoming power-domain code for sh-mobile, before committing. > Any updates on this?