[PATCH v5 0/6] Add Rockchip RGA V4l2 support

From: Jacob Chen
Date: Tue Aug 01 2017 - 23:20:10 EST

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.
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@xxxxxxxxxxxxxxxxxxxxxx
It remind that we could write a v4l2 m2m RGA driver, since we usually use RGA for streaming purpose.

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

change in V5:
- v4l2-compliance: handle invalid pxielformat
- v4l2-compliance: add subscribe_event
- add colorspace support

change in V4:
- document the controls.
- change according to Hans's comments

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 (6):
v4l: add portduff blend modes
extended-controls.rst: add PorterDuff mode control
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 +
Documentation/media/uapi/v4l/extended-controls.rst | 5 +
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 | 155 +++
drivers/media/platform/rockchip-rga/rga-hw.c | 671 +++++++++++++
drivers/media/platform/rockchip-rga/rga-hw.h | 437 +++++++++
drivers/media/platform/rockchip-rga/rga.c | 1024 ++++++++++++++++++++
drivers/media/platform/rockchip-rga/rga.h | 110 +++
drivers/media/v4l2-core/v4l2-ctrls.c | 20 +-
include/uapi/linux/v4l2-controls.h | 20 +-
14 files changed, 2511 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