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| author | Hugues Fruchet <hugues.fruchet@st.com> | 2017-02-02 12:59:50 -0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2017-02-08 10:03:49 -0200 |
| commit | 91c83f395fbe7c89eca46ad2d5bde49f4f8de2c4 (patch) | |
| tree | bbaf771cc11a93457f5492bc6eb57fa4d9d13f81 /drivers/media/platform/Kconfig | |
| parent | c502e583506ec94cee780c080fff7b4e9ef6ef61 (diff) | |
| download | op-kernel-dev-91c83f395fbe7c89eca46ad2d5bde49f4f8de2c4.zip op-kernel-dev-91c83f395fbe7c89eca46ad2d5bde49f4f8de2c4.tar.gz | |
[media] st-delta: rpmsg ipc support
IPC (Inter Process Communication) support for communication with
DELTA coprocessor firmware using rpmsg kernel framework.
Based on 4 services open/set_stream/decode/close and their associated
rpmsg messages.
The messages structures are duplicated on both host and firmware
side and are packed (use only of 32 bits size fields in messages
structures to ensure packing).
Each service is synchronous; service returns only when firmware
acknowledges the associated command message.
Due to significant parameters size exchanged from host to copro,
parameters are not inserted in rpmsg messages. Instead, parameters are
stored in physical memory shared between host and coprocessor.
Memory is non-cacheable, so no special operation is required
to ensure memory coherency on host and on coprocessor side.
Multi-instance support and re-entrance are ensured using host_hdl and
copro_hdl in message header exchanged between both host and coprocessor.
This avoids to manage tables on both sides to get back the running context
of each instance.
Acked-by: Peter Griffin <peter.griffin@linaro.org>
Signed-off-by: Hugues Fruchet <hugues.fruchet@st.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'drivers/media/platform/Kconfig')
| -rw-r--r-- | drivers/media/platform/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig index 863c61a..f84f8c7 100644 --- a/drivers/media/platform/Kconfig +++ b/drivers/media/platform/Kconfig @@ -337,6 +337,7 @@ config VIDEO_STI_DELTA_DRIVER default n select VIDEOBUF2_DMA_CONTIG select V4L2_MEM2MEM_DEV + select RPMSG endif # VIDEO_STI_DELTA |
