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a1e2940458
This adds support for stateful V4L2 M2M based driver for Imagination E5010 JPEG Encoder [1] which supports baseline encoding with two different quantization tables and compression ratio as demanded. Support for both contiguous and non-contiguous YUV420 and YUV422 semiplanar formats is added along with alignment restrictions as required by the hardware. System and runtime PM hooks are added in the driver along with v4l2 crop and selection API support. Minimum resolution supported is 64x64 and Maximum resolution supported is 8192x8192. All v4l2-compliance tests are passing [2] : v4l2-compliance -s -f -a -d /dev/video0 -e /dev/video1 Total for e5010 device /dev/video0: 79, Succeeded: 79, Failed: 0, Warnings: 0 NOTE: video1 here is VIVID test pattern generator Also tests [3] were run manually to verify below driver features: - Runtime Power Management - Multi-instance JPEG Encoding - DMABUF import, export support - NV12, NV21, NV16, NV61 video format support - Compression quality S_CTRL - Cropping support using S_SELECTION Existing V4L2 M2M based JPEG drivers namely s5p-jpeg, imx-jpeg and rcar_jpu were referred while making this. TODO: Add MMU and memory tiling support [1]: AM62A TRM (Section 7.6 is for JPEG Encoder) : Link: https://www.ti.com/lit/pdf/spruj16 [2]: v4l2-compliance test : Link: https://gist.github.com/devarsht/1f039c631ca953a57f405cfce1b69e49 [3]: 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 Co-developed-by: David Huang <d-huang@ti.com> Signed-off-by: David Huang <d-huang@ti.com> Signed-off-by: Devarsh Thakkar <devarsht@ti.com> Reviewed-by: Benjamin Gaignard <benjamin.gaignard@collabora.com> Signed-off-by: Sebastian Fricke <sebastian.fricke@collabora.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.