[PATCH v2 0/3] Add Qualcomm JPEG V4L2 encoder for SM8250

[Atanas Filipov]

This series adds support for the Qualcomm JPEG V4L2 mem2mem encoder on SM8250.

The goal is to upstream a standards-based JPEG encode path using the V4L2 M2M
framework, with DT-described hardware resources and SoC DTS integration.

Patch layout:
- 1/3: dt-bindings: media: qcom,jpeg-encoder: add binding
- 2/3: arm64: dts: qcom: sm8250: add JPEG encoder node
- 3/3: media: qcom: jpeg: add Qualcomm JPEG V4L2 encoder

Supported compatibles:
- qcom,sm8250-jenc

Driver scope and design choices:
- uses the standard V4L2 mem2mem + vb2 workflow
- maps runtime resources from DT (clocks/interconnects/iommu/etc.)
- keeps userspace interface within existing V4L2 JPEG controls/framework
- uses runtime PM for balanced power transitions across stream/probe/remove

Functional validation (hardware):
- platform: Kona / SM8250 / qcom,sm8250-jenc / RB5
- tested with v4l2-ctl and GStreamer (v4l2jpegenc):
  - single-frame encode: 8192x8192 NV12
  - single-frame encode: 1920x1080 NV12
  - single-frame encode: 1920x1080 GREY
  - GStreamer NV12 pipeline to JPEG files
  - GStreamer GRAY8 pipeline to MJPEG output

Changes since v1:

  Binding (dt-bindings: media: qcom,jpeg-encoder):
  - Removed qcm6490 and sm8550 compatible strings; this series is SM8250
    only.
  - Fixed clock-names block in the binding example.
  - Added operating-points-v2 property documentation.
  - Fixed reg in the example to use the correct 2-cell (64-bit) format
    matching the sm8250 soc node address/size cells.
  - Dropped reg-names: with a single reg entry it is unnecessary.
  - Removed description literal block scalar (|).
  - Dropped _clk suffix from clock-names.
  - Added iommus description in the properties section with
    minItems/maxItems constraints.

  Driver (media: qcom: jpeg):
  - Trimmed hardware register map and definitions.
  - Migrated to devm_clk_bulk_get_all() replacing per-SoC named clock
    arrays.
  - Migrated to the OPP framework for core clock rate and performance
    level management; the OPP table is embedded in the DTS node and maps
    performance levels to frequencies.
  - Switched to devm_platform_ioremap_resource(pdev, 0); reg-names no
    longer needed.
  - Switched to RUNTIME_PM_OPS() and SYSTEM_SLEEP_PM_OPS() macros.
  - Switched to devm_mutex_init().
  - platform_set_drvdata() moved to immediately after allocation.
  - .pm uses pm_ptr().

Known limitations:
- scaling is not supported
- width and height must be aligned to 16 pixels

Atanas Filipov (3):
  dt-bindings: media: qcom: Add JPEG encoder binding
  arm64: dts: qcom: sm8250: Add JPEG encoder node
  media: qcom: jpeg: Add Qualcomm JPEG V4L2 encoder

Atanas Filipov (3):
  dt-bindings: media: qcom: Add JPEG encoder binding
  arm64: dts: qcom: sm8250: Add JPEG encoder node
  media: qcom: jpeg: Add Qualcomm JPEG V4L2 encoder

 .../bindings/media/qcom,jpeg-encoder.yaml     |  135 ++
 arch/arm64/boot/dts/qcom/sm8250.dtsi          |   65 +
 drivers/media/platform/qcom/Kconfig           |    1 +
 drivers/media/platform/qcom/Makefile          |    1 +
 drivers/media/platform/qcom/jpeg/Kconfig      |   17 +
 drivers/media/platform/qcom/jpeg/Makefile     |    9 +
 .../media/platform/qcom/jpeg/qcom_jenc_defs.h |  259 +++
 .../media/platform/qcom/jpeg/qcom_jenc_dev.c  |  313 ++++
 .../media/platform/qcom/jpeg/qcom_jenc_dev.h  |  109 ++
 .../media/platform/qcom/jpeg/qcom_jenc_hdr.c  |  354 ++++
 .../media/platform/qcom/jpeg/qcom_jenc_hdr.h  |  119 ++
 .../media/platform/qcom/jpeg/qcom_jenc_ops.c  | 1510 +++++++++++++++++
 .../media/platform/qcom/jpeg/qcom_jenc_ops.h  |   52 +
 .../media/platform/qcom/jpeg/qcom_jenc_res.c  |   39 +
 .../media/platform/qcom/jpeg/qcom_jenc_res.h  |   30 +
 .../qcom/jpeg/qcom_jenc_v420_hw_info.h        |  527 ++++++
 .../media/platform/qcom/jpeg/qcom_jenc_v4l2.c | 1136 +++++++++++++
 .../media/platform/qcom/jpeg/qcom_jenc_v4l2.h |   25 +
 18 files changed, 4701 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/media/qcom,jpeg-encoder.yaml
 create mode 100644 drivers/media/platform/qcom/jpeg/Kconfig
 create mode 100644 drivers/media/platform/qcom/jpeg/Makefile
 create mode 100644 drivers/media/platform/qcom/jpeg/qcom_jenc_defs.h
 create mode 100644 drivers/media/platform/qcom/jpeg/qcom_jenc_dev.c
 create mode 100644 drivers/media/platform/qcom/jpeg/qcom_jenc_dev.h
 create mode 100644 drivers/media/platform/qcom/jpeg/qcom_jenc_hdr.c
 create mode 100644 drivers/media/platform/qcom/jpeg/qcom_jenc_hdr.h
 create mode 100644 drivers/media/platform/qcom/jpeg/qcom_jenc_ops.c
 create mode 100644 drivers/media/platform/qcom/jpeg/qcom_jenc_ops.h
 create mode 100644 drivers/media/platform/qcom/jpeg/qcom_jenc_res.c
 create mode 100644 drivers/media/platform/qcom/jpeg/qcom_jenc_res.h
 create mode 100644 drivers/media/platform/qcom/jpeg/qcom_jenc_v420_hw_info.h
 create mode 100644 drivers/media/platform/qcom/jpeg/qcom_jenc_v4l2.c
 create mode 100644 drivers/media/platform/qcom/jpeg/qcom_jenc_v4l2.h


base-commit: 8d6dbbbe3ba62de0a63e962ee004afb848c8e3ac
prerequisite-patch-id: 8bfa054e24f9de8d7a09cfab8db0efff173d98fc
-- 
2.34.1