[PATCH v10 00/11] Add V4L2 M2M Driver for E5010 JPEG Encoder

Devarsh Thakkar
2024-05-30T16:59:55Z

This adds support for V4L2 M2M based driver for E5010 JPEG Encoder
which is a stateful JPEG encoder from Imagination technologies
and is present in TI AM62A SoC.

While adding support for it, following additional framework changes were
made:
- Moved reference quantization and huffman tables provided in
ITU-T-REC-T.81 to v4l2-jpeg.c as suggested in mailing list [1].
- Add macros to round to closest integer (either higher or lower) while
rounding in order of 2.
- Add KUnit tests for math functions.

v4l2-compliance test :
Link: https://gist.github.com/devarsht/1f039c631ca953a57f405cfce1b69e49

E5010 JPEG Encoder Manual tests :

Performance:
Link: https://gist.github.com/devarsht/c40672944fd71c9a53ab55adbfd9e28b

Functionality:
Link: https://gist.github.com/devarsht/8e88fcaabff016bb2bac83d89c9d23ce

Compression Quality:
Link: https://gist.github.com/devarsht/cbcc7cd97e8c48ba1486caa2b7884655

Multi Instance:
Link: https://gist.github.com/devarsht/22c2fca08cd3441fb40f2c7a4cebc95a

Crop support:
Link: https://gist.github.com/devarsht/de6f5142f678bb1a5338abfd9f814abd

Runtime PM:
Link: https://gist.github.com/devarsht/70cd95d4440ddc678489d93885ddd4dd

Math lib KUnit tests:
Link: https://gist.github.com/devarsht/3f9042825be3da4e133b8f4eda067876

[1]:
https://lore.kernel.org/all/de46aefe-36da-4e1a-b4fa-b375b2749181@xs4all.nl/

Changelog:
V9->V10:
- Update commenting style in math.h and add notes for new jpeg header
macros
- Add KUnit dependency for math_kunit

V8->V9:
- Remove kernel.h header file
- Remove stale filler data on jpeg header in E5010 jpeg driver

V7->V8:
- Add KUnit tests for math functions
- Add roundclosest() for supporting rounding for non-multiple of 2
- Update commit message as suggested
- Add Reviewed-by and Acked-by tags to patches as received

V6->V7:
- Fix cropping support
- Move reference huffman and quantization tables to v4l2-jpeg.c
- Fix suspend/resume use-case
- Add Reviewed-by

V5->V6:
- Fix sparse warnings

V4->V5:
- Sort the #includes in driver file alphabetically
- Rename huffman and quantization tables to not use '_'
- Add Reviewed-by tag

V3->V4:
- Use ti-specific compatible ti,am62a-jpeg-enc as secondary one in
dt-binding
- Remove clock-names as only single clock in dt-binding
- Fix issue with default params setting
- Correct v4l2 error prints
- Simplify register write functions with single statement return values
- Remove unrequired error checks from get_queue()
- Drop explicit device_caps setting as it is already taken care by v4l2
core
- Remove unrequired multiplanar checks and memset from s_fmt, g_fmt
callback functions
- Fix try_fmt callback to not update the queues
- Remove unrequired contiguous format attribute from queue_init
- Use dynamic allocation for video_device and remove unrequired
assignments in probe()
- Remove unrequired checks from queue_setup function
- Return queued buffers back if start_streaming fails
- Use ARRAY_SIZE in place of hard-coding
- Use huffman and quantization tables from reference header file

V2->V3:
- Add DONOTMERGE patches for dts and defconfig
- Update driver with below changes :
- Correct license headers
- Use more generic name core instead of jasper for base registers
- Add Comment for forward declarations
- Simplify quantization table calculations
- Use v4l2_apply_frmsize_constraints for updating framesize and remove
unrequired functions
- Place TODO at top of file and in commit message too
- Use dev_err_probe helper in probe function
- Fix return value checking for failure scenarios in probe function
- Use v4l2_err/info/warn helpers instead of dev_err/info/warn helpers
- Fix unexpected indentation
- Correct commit message
- Update dt-bindings with below changes :
- Add vendor specific compatible
- Fix commit title and message
- Update reg names
- Update clocks to 1
- Fix dts example with proper naming

V1->V2:
- Send dt-bindings and driver together

Patch-Diff between the series :
V9->V10 Range diff :
https://gist.github.com/devarsht/b446acee460b8c65fb577d06b7bbc1da

V8->V9 Range diff :
https://gist.github.com/devarsht/3fd6c4e8031ab114248f93d01c8dfc74

V6->V7 Range diff :
https://gist.github.com/devarsht/1db185b1e187eaf397e9e4c37066777e

V5->V6 Range diff :
https://gist.github.com/devarsht/c89180ac2b0d2814614f2b59d0705c19

V4->V5 Range diff :
https://gist.github.com/devarsht/298790af819f299a0a05fec89371097b

V3->V4 Range diff :
https://gist.github.com/devarsht/22a744d999080de6e813bcfb5a596272

Previous patch series:
V9: https://lore.kernel.org/all/20240526175655.1093707-1-devarsht@ti.com/
V8: https://lore.kernel.org/all/20240517171532.748684-1-devarsht@ti.com/
V7: https://lore.kernel.org/all/20240510082603.1263256-1-devarsht@ti.com/
V6: https://lore.kernel.org/all/20240228141140.3530612-1-devarsht@ti.com/
V5: https://lore.kernel.org/all/20240215134641.3381478-1-devarsht@ti.com/
V4: https://lore.kernel.org/all/20240205114239.924697-1-devarsht@ti.com/
V3: https://lore.kernel.org/all/20230816152210.4080779-1-devarsht@ti.com/
V2: https://lore.kernel.org/all/20230727112546.2201995-1-devarsht@ti.com/

Daniel Latypov (1):
lib: add basic KUnit test for lib/math

Devarsh Thakkar (10):
media: dt-bindings: Add Imagination E5010 JPEG Encoder
media: imagination: Add E5010 JPEG Encoder driver
media: v4l2-jpeg: Export reference quantization and huffman tables
media: imagination: Use exported tables from v4l2-jpeg core
media: verisilicon : Use exported tables from v4l2-jpeg for hantro
codec
math.h: Add macros for rounding to closest value
Documentation: core-api: Add math.h macros and functions
lib: math_kunit: Add tests for new macros related to rounding to
nearest value
media: imagination: Round to closest multiple for cropping region
gpu: ipu-v3: Use generic macro for rounding closest to specified value

Documentation/core-api/kernel-api.rst | 6 +
.../bindings/media/img,e5010-jpeg-enc.yaml | 75 +
MAINTAINERS | 7 +
drivers/gpu/ipu-v3/ipu-image-convert.c | 4 +-
drivers/media/platform/Kconfig | 1 +
drivers/media/platform/Makefile | 1 +
drivers/media/platform/imagination/Kconfig | 12 +
drivers/media/platform/imagination/Makefile | 3 +
.../platform/imagination/e5010-core-regs.h | 585 ++++++
.../platform/imagination/e5010-jpeg-enc-hw.c | 267 +++
.../platform/imagination/e5010-jpeg-enc-hw.h | 42 +
.../platform/imagination/e5010-jpeg-enc.c | 1644 +++++++++++++++++
.../platform/imagination/e5010-jpeg-enc.h | 168 ++
.../platform/imagination/e5010-mmu-regs.h | 311 ++++
.../media/platform/verisilicon/hantro_jpeg.c | 128 +-
drivers/media/v4l2-core/v4l2-jpeg.c | 162 +-
include/linux/math.h | 72 +
include/media/v4l2-jpeg.h | 28 +
lib/math/Kconfig | 14 +
lib/math/Makefile | 1 +
lib/math/math_kunit.c | 325 ++++
21 files changed, 3738 insertions(+), 118 deletions(-)
create mode 100644 Documentation/devicetree/bindings/media/img,e5010-jpeg-enc.yaml
create mode 100644 drivers/media/platform/imagination/Kconfig
create mode 100644 drivers/media/platform/imagination/Makefile
create mode 100644 drivers/media/platform/imagination/e5010-core-regs.h
create mode 100644 drivers/media/platform/imagination/e5010-jpeg-enc-hw.c
create mode 100644 drivers/media/platform/imagination/e5010-jpeg-enc-hw.h
create mode 100644 drivers/media/platform/imagination/e5010-jpeg-enc.c
create mode 100644 drivers/media/platform/imagination/e5010-jpeg-enc.h
create mode 100644 drivers/media/platform/imagination/e5010-mmu-regs.h
create mode 100644 lib/math/math_kunit.c

--
2.39.1