From: Viresh Kumar <viresh.kumar@st.com>
To: Vinod Koul <vinod.koul@intel.com>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Armando VISCONTI <armando.visconti@st.com>,
Shiraz HASHIM <shiraz.hashim@st.com>,
Vipin KUMAR <vipin.kumar@st.com>,
Rajeev KUMAR <rajeev-dlh.kumar@st.com>,
Deepak SIKRI <deepak.sikri@st.com>,
Vipul Kumar SAMAR <vipulkumar.samar@st.com>,
Amit VIRDI <Amit.VIRDI@st.com>,
Pratyush ANAND <pratyush.anand@st.com>,
Bhupesh SHARMA <bhupesh.sharma@st.com>,
"viresh.linux@gmail.com" <viresh.linux@gmail.com>,
Bhavna YADAV <bhavna.yadav@st.com>,
Vincenzo FRASCINO <Vincenzo.FRASCINO@st.com>,
Mirko GARDI <mirko.gardi@st.com>
Subject: Re: [PATCH] dmaengine/dw_dmac: Reconfigure interrupt and chan_cfg register on resume
Date: Tue, 22 Nov 2011 11:50:15 +0530 [thread overview]
Message-ID: <4ECB3F1F.9060806@st.com> (raw)
In-Reply-To: <1321935206.1516.217.camel@vkoul-udesk3>
On 11/22/2011 9:43 AM, Vinod Koul wrote:
> On Thu, 2011-11-17 at 16:01 +0530, Viresh Kumar wrote:
>> > In S2R all DMA registers are reset by hardware and thus they are required to be
> When are they reset, whenever you leave channel idle or once you come
> back from suspend?
Whenever we do S2R, many power islands are switched off and so DMAC controller looses
all its power. On resume, all registers are in their reset state.
--
viresh
next prev parent reply other threads:[~2011-11-22 6:20 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-17 10:31 [PATCH] dmaengine/dw_dmac: Reconfigure interrupt and chan_cfg register on resume Viresh Kumar
2011-11-22 4:13 ` Vinod Koul
2011-11-22 6:20 ` Viresh Kumar [this message]
2011-11-23 10:49 ` Vinod Koul
2011-11-23 11:11 ` Viresh Kumar
2011-11-23 11:32 ` Vinod Koul
2011-11-23 11:40 ` Viresh Kumar
2011-11-28 3:20 ` Vinod Koul
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