[PATCH v2 00/12] media: stm32: dcmi: stability & performance enhancements

[Alexandre TORGUE]

Hi

On 1/6/26 12:34, Alain Volmat wrote:
> This series improve stability of the capture by fixing the
> handling of the overrun which was leading to captured
> frame corruption.
> Locking within the driver is also simplified and the way
> DMA is handled is reworked allowing to avoid having a
> specific handling for the JPEG data.
> 
> Performances of capture can now be increased via the usage
> of a DMA->MDMA chaining which allows for capture of higher
> resolution / framerate.
> 
> Signed-off-by: Alain Volmat <alain.volmat at foss.st.com>
> ---
> Changes in v2:
> - Fix pm_sleep_ptr -> pm_ptr to avoid unused function warning
> - Fix typo / remove useless comment in binding
> - Link to v1: https://lore.kernel.org/r/20251218-stm32-dcmi-dma-chaining-v1-0-39948ca6cbf6@foss.st.com
> 
> ---
> Alain Volmat (12):
>        media: stm32: dcmi: Switch from __maybe_unused to pm_ptr()
>        media: stm32: dcmi: perform dmaengine_slave_config at probe
>        media: stm32: dcmi: only create dma descriptor once at buf_prepare
>        media: stm32: dcmi: stop the dma transfer on overrun
>        media: stm32: dcmi: rework spin_lock calls
>        media: stm32: dcmi: perform all dma handling within irq_thread
>        media: stm32: dcmi: use dmaengine_terminate_async in irq context
>        media: stm32: dcmi: continuous mode capture in JPEG
>        dt-bindings: media: st: dcmi: add DMA-MDMA chaining properties
>        media: stm32: dcmi: addition of DMA-MDMA chaining support
>        ARM: dts: stm32: add sram node within stm32mp151.dtsi
>        ARM: dts: stm32: enable DCMI DMA-MDMA chaining on stm32mp157c-ev1.dts
> 
>   .../devicetree/bindings/media/st,stm32-dcmi.yaml   |  11 +-
>   arch/arm/boot/dts/st/stm32mp151.dtsi               |   8 +
>   arch/arm/boot/dts/st/stm32mp157c-ev1.dts           |  15 +
>   drivers/media/platform/st/stm32/stm32-dcmi.c       | 475 +++++++++++++--------
>   4 files changed, 341 insertions(+), 168 deletions(-)
> ---
> base-commit: f7231cff1f3ff8259bef02dc4999bc132abf29cf
> change-id: 20251213-stm32-dcmi-dma-chaining-9ea1da83007d
> 
> Best regards,

DT patches applied stm32-next branch.

regards
Alex