Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Subject: Re: [PATCH v4 12/15] dmaengine: ti: New driver for K3 UDMA - split#4:
 dma_device callbacks 1
To:     Vinod Koul <vkoul@kernel.org>
CC:     <robh+dt@kernel.org>, <nm@ti.com>, <ssantosh@kernel.org>,
        <dan.j.williams@intel.com>, <dmaengine@vger.kernel.org>,
        <linux-arm-kernel@lists.infradead.org>,
        <devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <grygorii.strashko@ti.com>, <lokeshvutla@ti.com>,
        <t-kristo@ti.com>, <tony@atomide.com>, <j-keerthy@ti.com>
References: <20191101084135.14811-1-peter.ujfalusi@ti.com>
 <20191101084135.14811-13-peter.ujfalusi@ti.com>
 <20191111060943.GQ952516@vkoul-mobl>
From:   Peter Ujfalusi <peter.ujfalusi@ti.com>
Message-ID: <6d73f6e1-6d85-d468-2e69-47d36ed75807@ti.com>
Date:   Mon, 11 Nov 2019 12:29:38 +0200
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101
 Thunderbird/60.9.0
MIME-Version: 1.0
In-Reply-To: <20191111060943.GQ952516@vkoul-mobl>
Content-Type: text/plain; charset="utf-8"
Content-Language: en-US
Content-Transfer-Encoding: 8bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk


On 11/11/2019 8.09, Vinod Koul wrote:
> On 01-11-19, 10:41, Peter Ujfalusi wrote:
> 
>> +/* Not much yet */
> 
> ?

Forgot to remove it when I did implemented the tx_status() ;)

> 
>> +static enum dma_status udma_tx_status(struct dma_chan *chan,
>> +				      dma_cookie_t cookie,
>> +				      struct dma_tx_state *txstate)
>> +{
>> +	struct udma_chan *uc = to_udma_chan(chan);
>> +	enum dma_status ret;
>> +	unsigned long flags;
>> +
>> +	spin_lock_irqsave(&uc->vc.lock, flags);
>> +
>> +	ret = dma_cookie_status(chan, cookie, txstate);
>> +
>> +	if (!udma_is_chan_running(uc))
>> +		ret = DMA_COMPLETE;
> 
> so a paused channel will result in dma complete status?

The channel is still enabled (running), the pause only sets a bit in the
channel's real time control register.

- Péter

Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki