linux-kernel - Re: [PATCH] dma: Add Xilinx AXI Video Direct Memory Access Engine driver support

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Date:	Mon, 20 Jan 2014 12:57:39 +0530
From:	Srikanth Thokala <sriku.linux@...il.com>
To:	Philip Balister <philip@...ister.org>
Cc:	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	devicetree@...r.kernel.org
Subject: Re: [PATCH] dma: Add Xilinx AXI Video Direct Memory Access Engine
 driver support

Hi Philip,

On Fri, Jan 17, 2014 at 8:06 PM, Philip Balister <philip@...ister.org> wrote:
> On 01/16/2014 12:53 PM, Srikanth Thokala wrote:
>>
>> This is the driver for the AXI Video Direct Memory Access (AXI
>> VDMA) core, which is a soft Xilinx IP core that provides high-
>> bandwidth direct memory access between memory and AXI4-Stream
>> type video target peripherals. The core provides efficient two
>> dimensional DMA operations with independent asynchronous read
>> and write channel operation.
>>
>
> [snip]
>
>
>> +/**
>> + * xilinx_vdma_start - Start VDMA channel
>> + * @chan: Driver specific VDMA channel
>> + */
>> +static void xilinx_vdma_start(struct xilinx_vdma_chan *chan)
>> +{
>> +       int loop = XILINX_VDMA_LOOP_COUNT + 1;
>> +
>> +       vdma_ctrl_set(chan, XILINX_VDMA_REG_DMACR,
>> XILINX_VDMA_DMACR_RUNSTOP);
>> +
>> +       /* Wait for the hardware to start */
>> +       while (loop)
>
>
>
> loop-- ?

I will fix it in v2.

Thanks
Srikanth
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