Messages in this thread Patch in this message | | | From | Sireesh Kodali <> | Subject | [PATCH 1/3] doc: dmaengine: client-api: Add immediate commands in the DMA client API | Date | Sun, 19 Sep 2021 20:13:19 +0530 |
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Immediate commands are used by the IPA driver to send commands to the microcontroller over BAM. These are different from PREP_CMD.
Signed-off-by: Sireesh Kodali <sireeshkodali1@gmail.com> --- Documentation/driver-api/dmaengine/provider.rst | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/Documentation/driver-api/dmaengine/provider.rst b/Documentation/driver-api/dmaengine/provider.rst index ddb0a81a796c..f92a0bae06a0 100644 --- a/Documentation/driver-api/dmaengine/provider.rst +++ b/Documentation/driver-api/dmaengine/provider.rst @@ -571,6 +571,16 @@ DMA_CTRL_REUSE writes for which the descriptor should be in different format from normal data descriptors. +- DMA_PREP_IMM_CMD + + - If set, the client driver tells DMA controller that passed data in DMA + API is immediate command data. + + - Interpretation of command data is DMA controller specific. It can be + used for issuing immediate commands to other peripherals/register + reads/register writes for which the descriptor shoudl be in a + different format from normal data descriptors. + - DMA_PREP_REPEAT - If set, the transfer will be automatically repeated when it ends until a -- 2.33.0
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