[RFC PATCH V0 0/7] media: platform: Add support for Face Detection (FD) on mt8183 SoC
hverkuil at xs4all.nl
Thu Mar 14 01:40:49 PDT 2019
Hi Jerry-ch Chen,
On 2/20/19 8:48 AM, Jerry-ch Chen wrote:
> This is the first version of the RFC patch series adding Face Detection
> (FD) driver on Mediatek mt8183 SoC, which will be used in camera features
> on CrOS application. It belongs to the first Mediatek's camera driver
> series based on V4L2 and media controller framework. I posted the main part
> of the FD driver as RFC to discuss first and would like some review
> comments on the overall structure of the driver.
> Face Detection (FD) unit provide hardware accelerated face detection
> feature. It can detect different sizes of faces in a given image.
> Furthermore, it has the capability to detect the faces of Rotation-in-Plane
> from -180 to +180 degrees and Rotation-off-Plane from -90 to +90 degrees.
> The driver is implemented with V4L2 and media controller framework. We have
> the following entities describing the FD path.
Just a high-level comment before you post the next version of this series:
Please compile the latest version of v4l2-compliance (part of
git://linuxtv.org/v4l-utils.git) and run it against your driver:
v4l2-compliance -m /dev/mediaX
Whenever you post a new version of this series, please do a 'git pull' of
the v4l-utils repo, recompile and retest with v4l2-compliance and post the
test results in the cover letter.
Obviously, there should be no FAILs and probably no warnings.
I suspect that streaming (e.g. adding the -s10 option to v4l2-compliance)
probably won't work since v4l2-compliance doesn't know about the meta data
> 1. Meta input (output video device): connects to FD sub device. It accepts
> the input parameter buffer from userspace. The metadata interface used
> currently is only a temporary solution to kick off driver development
> and is not ready for reviewed yet.
> 2. RAW (output video device): connects to FD sub device. It accepts input
> image buffer from userspace.
> 3. FD (sub device): connects to Meta output. When processing an image,
> FD hardware only returns the statistics of detected faces so it needs
> only one capture video devices to return the streaming data to the user.
> 4. Meta output (capture video device): Return the result of detected faces
> as metadata output.
> The overall file structure of the FD driver is as following:
> * mtk_fd-dev-ctx-core.c: Implements common software flow of FD driver.
> * mtk_fd-v4l2.c: Static FD contexts configuration.
> * mtk_fd.c: Controls the hardware flow.
> * mtk_fd-dev.c: Implements context-independent flow.
> * mtk_fd-ctrl.c: Handles the HW ctrl request from userspace.
> * mtk_fd-smem-drv.c: Provides the shared memory management required
> operation. We reserved a memory region for the co-processor and FD to
> exchange the hardware configuration data.
> * mtk_fd-v4l2-util.c: Implements V4L2 and vb2 ops.
> Jerry-ch Chen (7):
> dt-bindings: mt8183: Add binding for FD shared memory
> dts: arm64: mt8183: Add FD shared memory node
> dt-bindings: mt8183: Added FD-SMEM dt-bindings
> dt-bindings: mt8183: Added FD dt-bindings
> dts: arm64: mt8183: Add FD nodes
> media: platform: Add Mediatek FD driver KConfig
> platform: mtk-isp: Add Mediatek FD driver
> .../devicetree/bindings/media/mediatek,fd_smem.txt | 28 +
> .../bindings/media/mediatek,mt8183-fd.txt | 30 +
> .../mediatek,reserve-memory-fd_smem.txt | 44 +
> arch/arm64/boot/dts/mediatek/mt8183.dtsi | 28 +
> drivers/media/platform/Kconfig | 2 +
> drivers/media/platform/mtk-isp/Kconfig | 10 +
> drivers/media/platform/mtk-isp/Makefile | 16 +
> drivers/media/platform/mtk-isp/fd/Makefile | 38 +
> drivers/media/platform/mtk-isp/fd/mtk_fd-core.h | 157 +++
> drivers/media/platform/mtk-isp/fd/mtk_fd-ctx.h | 299 ++++++
> .../platform/mtk-isp/fd/mtk_fd-dev-ctx-core.c | 917 +++++++++++++++++
> drivers/media/platform/mtk-isp/fd/mtk_fd-dev.c | 355 +++++++
> drivers/media/platform/mtk-isp/fd/mtk_fd-dev.h | 198 ++++
> .../media/platform/mtk-isp/fd/mtk_fd-smem-drv.c | 452 +++++++++
> drivers/media/platform/mtk-isp/fd/mtk_fd-smem.h | 25 +
> .../media/platform/mtk-isp/fd/mtk_fd-v4l2-util.c | 1046 ++++++++++++++++++++
> drivers/media/platform/mtk-isp/fd/mtk_fd-v4l2.c | 115 +++
> drivers/media/platform/mtk-isp/fd/mtk_fd-v4l2.h | 36 +
> drivers/media/platform/mtk-isp/fd/mtk_fd.c | 730 ++++++++++++++
> drivers/media/platform/mtk-isp/fd/mtk_fd.h | 127 +++
> 20 files changed, 4653 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/media/mediatek,fd_smem.txt
> create mode 100644 Documentation/devicetree/bindings/media/mediatek,mt8183-fd.txt
> create mode 100644 Documentation/devicetree/bindings/reserved-memory/mediatek,reserve-memory-fd_smem.txt
> create mode 100644 drivers/media/platform/mtk-isp/Kconfig
> create mode 100644 drivers/media/platform/mtk-isp/Makefile
> create mode 100644 drivers/media/platform/mtk-isp/fd/Makefile
> create mode 100644 drivers/media/platform/mtk-isp/fd/mtk_fd-core.h
> create mode 100644 drivers/media/platform/mtk-isp/fd/mtk_fd-ctx.h
> create mode 100644 drivers/media/platform/mtk-isp/fd/mtk_fd-dev-ctx-core.c
> create mode 100644 drivers/media/platform/mtk-isp/fd/mtk_fd-dev.c
> create mode 100644 drivers/media/platform/mtk-isp/fd/mtk_fd-dev.h
> create mode 100644 drivers/media/platform/mtk-isp/fd/mtk_fd-smem-drv.c
> create mode 100644 drivers/media/platform/mtk-isp/fd/mtk_fd-smem.h
> create mode 100644 drivers/media/platform/mtk-isp/fd/mtk_fd-v4l2-util.c
> create mode 100644 drivers/media/platform/mtk-isp/fd/mtk_fd-v4l2.c
> create mode 100644 drivers/media/platform/mtk-isp/fd/mtk_fd-v4l2.h
> create mode 100644 drivers/media/platform/mtk-isp/fd/mtk_fd.c
> create mode 100644 drivers/media/platform/mtk-isp/fd/mtk_fd.h
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