From: vinod.koul@intel.com (Vinod Koul)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3] IMX/SDMA : save the real count for one DMA transaction.
Date: Mon, 05 Dec 2011 08:24:19 +0530 [thread overview]
Message-ID: <1323053659.30390.45.camel@vkoul-udesk3> (raw)
In-Reply-To: <1322792185-4704-1-git-send-email-b32955@freescale.com>
On Fri, 2011-12-02 at 10:16 +0800, Huang Shijie wrote:
> When we use the SDMA in the UART driver(such as imx6q), we will
> meet one situation:
> Assume we set 64 bytes for the RX DMA buffer.
> The RX DMA buffer has received some data, but not full.
> An Aging DMA request will be received by the SDMA controller if we enable the
> IDDMAEN(UCR4[6]) in this case.
>
> So the UART driver needs to know the count of the real received bytes,
> and push them to upper layer.
>
> Add two new fields to sdmac, and update the `residue` in sdma_tx_status().
>
> Signed-off-by: Huang Shijie <b32955@freescale.com>
Applied thanks
--
~Vinod
prev parent reply other threads:[~2011-12-05 2:54 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-02 2:16 [PATCH v3] IMX/SDMA : save the real count for one DMA transaction Huang Shijie
2011-12-05 2:54 ` Vinod Koul [this message]
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