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It only includes DT-driven changes. Non-DT driver feedback and cleanups will be addressed once the DT structure is agreed. On i.MX95 the Wave6 hardware exposes one control register region and four interface register regions for one shared video processing engine. In this RFC, the control region is described by the parent node and the interface regions by child nodes. The control and interface regions are distinct DMA requesters and can be associated with separate IOMMU stream IDs, allowing DMA isolation between them. The control region has its own MMIO range, and each interface region has its own MMIO range and interrupt. I also evaluated folding all resources into a single parent node, but in that model all stream IDs end up attached to the same IOMMU domain and we observed loss of DMA isolation. Alternatives such as iommu-map or a vendor-specific stream ID property were considered, but they do not seem to fit this use case. Thanks for your time and feedback. RFC v5: - Move all shared resources to the parent node - Drop child compatible and use data-only interface child nodes - Update the VPU driver to create child devices and load the core driver v4: - Fixed build issues reported by CI tools - Updated commit messages to use imperative mood - Avoided using the same name for both nodes and labels in devicetree - Removed unused labels from YAML examples - Added description for child(vpu-core) node - Added iommus property to both parent(vpu) and child(vpu-core) nodes - Updated probe() functions to use dev_err_probe() when returning -EPROBE_DEFER - Added wave6_vpu prefix to trace functions - Updated HEVC decoder profile control to report MAIN_STILL profile - Fixed bug in multiple instance creation by pre-allocating work buffer - Fixed interrupt handling by checking INSTANCE_INFO register and instance list v3: - Removed ambiguous SUPPORT_FOLLOWER feature - Used WARN_ON() for unexpected programming errors - Split thermal device code into wave6-vpu-thermal.c/h - Dropped wave6_cooling_disable module parameter - Replaced mutex_lock() with guard() - Added lockdep_assert_held() to clarify locking regions - Removed exported function due to dual-license and used function pointer - Added documentation and validation for state transitions - Added documentation for device structures - Added patch to enable VPU device in imx95 DTS - Updated DT bindings and driver to align with parent(vpu) and child(vpu-core) - Replaced magic numbers with mask and offset macros when accessing registers - Placed goto statements after an empty line - Printed HW info (e.g. product_code) via dev_dbg() for debugging - Replaced wave6_vpu_dec_give_command() with dedicated functions v2: - Refined DT bindings to better represent the hardware - Reworked driver to align with the parent(VPU) and child(CTRL, CORE) - Fixed build issues reported by CI tools (Smatch, Sparse, TRACE) - Improved commit messages with clearer descriptions - Added kernel-doc for exported functions - Removed redundant print statements and unused code - Reordered patches to prevent build failures Nas Chung (9): media: v4l2-common: Add YUV24 format info dt-bindings: media: nxp: Add Wave6 video codec device media: chips-media: wave6: Add Wave6 VPU interface media: chips-media: wave6: Add v4l2 m2m driver support media: chips-media: wave6: Add Wave6 core driver media: chips-media: wave6: Improve debugging capabilities media: chips-media: wave6: Add Wave6 thermal cooling device media: chips-media: wave6: Add Wave6 control driver arm64: dts: freescale: imx95: Add video codec node .../bindings/media/nxp,imx95-vpu.yaml | 163 + MAINTAINERS | 8 + .../boot/dts/freescale/imx95-15x15-evk.dts | 7 +- .../boot/dts/freescale/imx95-15x15-frdm.dts | 5 + .../boot/dts/freescale/imx95-19x19-evk.dts | 10 + .../dts/freescale/imx95-19x19-verdin-evk.dts | 10 + .../dts/freescale/imx95-phycore-fpsc.dtsi | 10 + .../dts/freescale/imx95-toradex-smarc-dev.dts | 5 + .../dts/freescale/imx95-toradex-smarc.dtsi | 5 + .../boot/dts/freescale/imx95-tqma9596sa.dtsi | 7 +- arch/arm64/boot/dts/freescale/imx95.dtsi | 35 + drivers/media/platform/chips-media/Kconfig | 1 + drivers/media/platform/chips-media/Makefile | 1 + .../media/platform/chips-media/wave6/Kconfig | 17 + .../media/platform/chips-media/wave6/Makefile | 17 + .../platform/chips-media/wave6/wave6-hw.c | 2929 +++++++++++++++++ .../platform/chips-media/wave6/wave6-hw.h | 73 + .../chips-media/wave6/wave6-regdefine.h | 641 ++++ .../platform/chips-media/wave6/wave6-trace.h | 289 ++ .../platform/chips-media/wave6/wave6-vdi.h | 92 + .../chips-media/wave6/wave6-vpu-core.c | 397 +++ .../chips-media/wave6/wave6-vpu-core.h | 123 + .../chips-media/wave6/wave6-vpu-dbg.c | 225 ++ .../chips-media/wave6/wave6-vpu-dbg.h | 14 + .../chips-media/wave6/wave6-vpu-dec.c | 1867 +++++++++++ .../chips-media/wave6/wave6-vpu-enc.c | 2691 +++++++++++++++ .../chips-media/wave6/wave6-vpu-thermal.c | 141 + .../chips-media/wave6/wave6-vpu-thermal.h | 26 + .../chips-media/wave6/wave6-vpu-v4l2.c | 507 +++ .../platform/chips-media/wave6/wave6-vpu.c | 816 +++++ .../platform/chips-media/wave6/wave6-vpu.h | 143 + .../platform/chips-media/wave6/wave6-vpuapi.c | 725 ++++ .../platform/chips-media/wave6/wave6-vpuapi.h | 1026 ++++++ .../chips-media/wave6/wave6-vpuconfig.h | 72 + .../chips-media/wave6/wave6-vpuerror.h | 262 ++ drivers/media/v4l2-core/v4l2-common.c | 1 + 36 files changed, 13359 insertions(+), 2 deletions(-) create mode 100644 Documentation/devicetree/bindings/media/nxp,imx95-vpu.yaml create mode 100644 drivers/media/platform/chips-media/wave6/Kconfig create mode 100644 drivers/media/platform/chips-media/wave6/Makefile create mode 100644 drivers/media/platform/chips-media/wave6/wave6-hw.c create mode 100644 drivers/media/platform/chips-media/wave6/wave6-hw.h create mode 100644 drivers/media/platform/chips-media/wave6/wave6-regdefine.h create mode 100644 drivers/media/platform/chips-media/wave6/wave6-trace.h create mode 100644 drivers/media/platform/chips-media/wave6/wave6-vdi.h create mode 100644 drivers/media/platform/chips-media/wave6/wave6-vpu-core.c create mode 100644 drivers/media/platform/chips-media/wave6/wave6-vpu-core.h create mode 100644 drivers/media/platform/chips-media/wave6/wave6-vpu-dbg.c create mode 100644 drivers/media/platform/chips-media/wave6/wave6-vpu-dbg.h create mode 100644 drivers/media/platform/chips-media/wave6/wave6-vpu-dec.c create mode 100644 drivers/media/platform/chips-media/wave6/wave6-vpu-enc.c create mode 100644 drivers/media/platform/chips-media/wave6/wave6-vpu-thermal.c create mode 100644 drivers/media/platform/chips-media/wave6/wave6-vpu-thermal.h create mode 100644 drivers/media/platform/chips-media/wave6/wave6-vpu-v4l2.c create mode 100644 drivers/media/platform/chips-media/wave6/wave6-vpu.c create mode 100644 drivers/media/platform/chips-media/wave6/wave6-vpu.h create mode 100644 drivers/media/platform/chips-media/wave6/wave6-vpuapi.c create mode 100644 drivers/media/platform/chips-media/wave6/wave6-vpuapi.h create mode 100644 drivers/media/platform/chips-media/wave6/wave6-vpuconfig.h create mode 100644 drivers/media/platform/chips-media/wave6/wave6-vpuerror.h -- 2.31.1