linux-kernel - [PATCH v3 0/5] Add Rockchip RGA V4l2 support

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <1501470460-12014-1-git-send-email-jacob-chen@iotwrt.com>
Date:   Mon, 31 Jul 2017 11:07:35 +0800
From:   Jacob Chen <jacob-chen@...wrt.com>
To:     linux-rockchip@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        devicetree@...r.kernel.org, heiko@...ech.de, robh+dt@...nel.org,
        mchehab@...nel.org, linux-media@...r.kernel.org,
        laurent.pinchart+renesas@...asonboard.com, hans.verkuil@...co.com,
        s.nawrocki@...sung.com, tfiga@...omium.org, nicolas@...fresne.ca,
        Jacob Chen <jacob-chen@...wrt.com>
Subject: [PATCH v3 0/5] Add Rockchip RGA V4l2 support

This patch series add a v4l2 m2m drvier for rockchip RGA direct rendering based 2d graphics acceleration module.

Before, my colleague yakir have write a drm RGA drvier and send it to the lists.
http://lists.infradead.org/pipermail/linux-arm-kernel/2016-March/416769.html
I have been asked to find a userspace user("compositor") for it, but after some studys, my conclusion is that unlike exynos g2d,
rockchip rga are not suitable for compositor. Rockchip RGA have a limited MMU, which means it can only hold several buffers in the same time.
When it was used in compositor, it will waste a lot of time to import/export/flush buffer, resulting in a bad performance.

A few months ago, i saw a discussion in dri-devel@...ts.freedesktop.org.
It remind that we could write a v4l2 m2m RGA driver, since we usually use RGA for streaming purpose.
https://patches.linaro.org/cover/97727/

I have test this driver with gstreamer v4l2transform plugin and it seems work well.

change in V3:
- rename the controls.
- add pm_runtime support.
- enable node by default.
- correct spelling in documents.

change in V2:
- generalize the controls.
- map buffers (10-50 us) in every cmd-run rather than in buffer-import to avoid get_free_pages failed on
actively used systems.
- remove status in dt-bindings examples.

Jacob Chen (5):
  [media] v4l: add blend modes controls
  [media]: rockchip/rga: v4l2 m2m support
  ARM: dts: rockchip: add RGA device node for RK3288
  ARM: dts: rockchip: add RGA device node for RK3399
  dt-bindings: Document the Rockchip RGA bindings

 .../devicetree/bindings/media/rockchip-rga.txt     |  33 +
 arch/arm/boot/dts/rk3288.dtsi                      |  11 +
 arch/arm64/boot/dts/rockchip/rk3399.dtsi           |  11 +
 drivers/media/platform/Kconfig                     |  11 +
 drivers/media/platform/Makefile                    |   2 +
 drivers/media/platform/rockchip-rga/Makefile       |   3 +
 drivers/media/platform/rockchip-rga/rga-buf.c      | 141 +++
 drivers/media/platform/rockchip-rga/rga-hw.c       | 650 ++++++++++++++
 drivers/media/platform/rockchip-rga/rga-hw.h       | 437 +++++++++
 drivers/media/platform/rockchip-rga/rga.c          | 987 +++++++++++++++++++++
 drivers/media/platform/rockchip-rga/rga.h          | 110 +++
 drivers/media/v4l2-core/v4l2-ctrls.c               |  20 +-
 include/uapi/linux/v4l2-controls.h                 |  16 +-
 13 files changed, 2430 insertions(+), 2 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/media/rockchip-rga.txt
 create mode 100644 drivers/media/platform/rockchip-rga/Makefile
 create mode 100644 drivers/media/platform/rockchip-rga/rga-buf.c
 create mode 100644 drivers/media/platform/rockchip-rga/rga-hw.c
 create mode 100644 drivers/media/platform/rockchip-rga/rga-hw.h
 create mode 100644 drivers/media/platform/rockchip-rga/rga.c
 create mode 100644 drivers/media/platform/rockchip-rga/rga.h

-- 
2.7.4