From: Vinod Koul <vkoul@kernel.org>
To: Amelie Delaunay <amelie.delaunay@foss.st.com>
Cc: Rob Herring <robh+dt@kernel.org>,
Dan Williams <dan.j.williams@intel.com>,
Maxime Coquelin <mcoquelin.stm32@gmail.com>,
Alexandre Torgue <alexandre.torgue@foss.st.com>,
dmaengine@vger.kernel.org, devicetree@vger.kernel.org,
linux-stm32@st-md-mailman.stormreply.com,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
Pierre-Yves Mordret <pierre-yves.mordret@foss.st.com>
Subject: Re: [PATCH 0/2] STM32 DMA alternative REQ/ACK protocol support
Date: Wed, 28 Jul 2021 12:39:57 +0530 [thread overview]
Message-ID: <YQECxSZqa9aHw6CB@matsya> (raw)
In-Reply-To: <20210624093959.142265-1-amelie.delaunay@foss.st.com>
On 24-06-21, 11:39, Amelie Delaunay wrote:
> Default REQ/ACK protocol consists in maintaining ACK signal up to the
> removal of REQuest and the transfer completion.
> In case of alternative REQ/ACK protocol, ACK de-assertion does not wait the
> removal of the REQuest, but only the transfer completion.
> Due to a possible DMA stream lock when transferring data to/from STM32
> USART/UART, add support to select alternative REQ/ACK protocol.
Applied, thanks
--
~Vinod
WARNING: multiple messages have this Message-ID (diff)
From: Vinod Koul <vkoul@kernel.org>
To: Amelie Delaunay <amelie.delaunay@foss.st.com>
Cc: Rob Herring <robh+dt@kernel.org>,
Dan Williams <dan.j.williams@intel.com>,
Maxime Coquelin <mcoquelin.stm32@gmail.com>,
Alexandre Torgue <alexandre.torgue@foss.st.com>,
dmaengine@vger.kernel.org, devicetree@vger.kernel.org,
linux-stm32@st-md-mailman.stormreply.com,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
Pierre-Yves Mordret <pierre-yves.mordret@foss.st.com>
Subject: Re: [PATCH 0/2] STM32 DMA alternative REQ/ACK protocol support
Date: Wed, 28 Jul 2021 12:39:57 +0530 [thread overview]
Message-ID: <YQECxSZqa9aHw6CB@matsya> (raw)
In-Reply-To: <20210624093959.142265-1-amelie.delaunay@foss.st.com>
On 24-06-21, 11:39, Amelie Delaunay wrote:
> Default REQ/ACK protocol consists in maintaining ACK signal up to the
> removal of REQuest and the transfer completion.
> In case of alternative REQ/ACK protocol, ACK de-assertion does not wait the
> removal of the REQuest, but only the transfer completion.
> Due to a possible DMA stream lock when transferring data to/from STM32
> USART/UART, add support to select alternative REQ/ACK protocol.
Applied, thanks
--
~Vinod
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next prev parent reply other threads:[~2021-07-28 7:10 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-24 9:39 [PATCH 0/2] STM32 DMA alternative REQ/ACK protocol support Amelie Delaunay
2021-06-24 9:39 ` Amelie Delaunay
2021-06-24 9:39 ` [PATCH 1/2] dt-bindings: dma: add alternative REQ/ACK protocol selection in stm32-dma Amelie Delaunay
2021-06-24 9:39 ` Amelie Delaunay
2021-07-14 19:27 ` Rob Herring
2021-07-14 19:27 ` Rob Herring
2021-06-24 9:39 ` [PATCH 2/2] dmaengine: stm32-dma: add alternate REQ/ACK protocol management Amelie Delaunay
2021-06-24 9:39 ` Amelie Delaunay
2021-07-28 7:09 ` Vinod Koul [this message]
2021-07-28 7:09 ` [PATCH 0/2] STM32 DMA alternative REQ/ACK protocol support Vinod Koul
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