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Subject[PATCH v4 0/9 drm: rcar-du: Add Color Management Module (CMM)
Date
[ Ugh, sorry for the double sending, but I forgot --cc-cover to git-send
email and the series has not been delivered to the mailing lists.
Sorry about that. ]

Hello, new iteration of CMM support, with quite a few changes compared to
v3:

References:
A reference to the v1 cover letter, with some background on the CMM is
available here:
https://lkml.org/lkml/2019/6/6/583
v2:
https://lore.kernel.org/linux-renesas-soc/20190706140746.29132-10-jacopo+renesas@jmondi.org/
v3:
https://lore.kernel.org/linux-renesas-soc/20190825135154.11488-1-jacopo+renesas@jmondi.org/

Change log:

*Bindings/DT:
- Rebased on renesas-devel-2019-09-03-v5.3-rc7
- Bindings converted to yaml: thanks Laurent for help
- s/'cmms'/'renesas,cmms'/ in DU bindings as suggested by Rob
- s/cmm-<soctype>/<soctype>-cmm/ as suggested by Geert
- squashed CMM addition for Gen3 SoCs in a single path at the end of
the series

*CMM/DU:
- Only accept fully populated LUT tables, remove the 'size' from the CMM
configuration structure as suggested by Laurent
- Simplify CMM configuration logic: only rely on color_mgmt_changed flag and
unconditionally provide a populated LUT table to the cmm_setup() function
- Protect against probing order inversion (DU is operation while CMM still has
not been probed) by adding rcar_cmm_init() operation as it is done for VSP as
suggested by Laurent
- Add CMM function stubs to fix compilation erros when CONFIG_DRM_RCAR_CMM is
not selected
- Minors in the CMM driver as suggested by Laurent
- Remove per-soc strings
- Make comments style consistent (not using /** anywhere in the .c file,
unify comment style)
- s/rcar_cmm_load()/rcar_cmm_write()/
- Squash cmm configuration and suspend/resume support in rcar_du_kms.c

Testing:
I have tested by injecting a color inversion LUT table at test program
initialization:
https://jmondi.org/cgit/kmsxx/commit/?h=gamma_lut&id=3c6af4db165e5b3dc8996f0a288746c35dbb1cb9
And by changing the CMM content to switch between a color inversion table
and a linear table every 50 frames:
https://jmondi.org/cgit/kmsxx/commit/?h=gamma_lut&id=fe178a43861da7c8e79618e2a13fa0f19dbcd03d

Pretty happy with the result, which seems to be consistent across system
suspend/resume.

Testing with real world use cases might be beneficial. Rajesh are you still
interested in giving this series a spin?

Thanks
j

Jacopo Mondi (9):
dt-bindings: display: renesas,cmm: Add R-Car CMM documentation
dt-bindings: display, renesas,du: Document cmms property
drm: rcar-du: Add support for CMM
drm: rcar-du: Claim CMM support for Gen3 SoCs
drm: rcar-du: kms: Initialize CMM instances
drm: rcar-du: crtc: Enable and disable CMMs
drm: rcar-du: crtc: Register GAMMA_LUT properties
drm: rcar-du: kms: Update CMM in atomic commit tail
arm64: dts: renesas: Add CMM units to Gen3 SoCs

.../bindings/display/renesas,cmm.yaml | 64 +++++
.../bindings/display/renesas,du.txt | 5 +
arch/arm64/boot/dts/renesas/r8a7795.dtsi | 40 ++-
arch/arm64/boot/dts/renesas/r8a7796.dtsi | 28 ++
arch/arm64/boot/dts/renesas/r8a77965.dtsi | 28 ++
arch/arm64/boot/dts/renesas/r8a77990.dtsi | 22 +-
arch/arm64/boot/dts/renesas/r8a77995.dtsi | 22 +-
drivers/gpu/drm/rcar-du/Kconfig | 7 +
drivers/gpu/drm/rcar-du/Makefile | 1 +
drivers/gpu/drm/rcar-du/rcar_cmm.c | 251 ++++++++++++++++++
drivers/gpu/drm/rcar-du/rcar_cmm.h | 61 +++++
drivers/gpu/drm/rcar-du/rcar_du_crtc.c | 17 ++
drivers/gpu/drm/rcar-du/rcar_du_crtc.h | 2 +
drivers/gpu/drm/rcar-du/rcar_du_drv.c | 32 ++-
drivers/gpu/drm/rcar-du/rcar_du_drv.h | 3 +
drivers/gpu/drm/rcar-du/rcar_du_group.c | 8 +
drivers/gpu/drm/rcar-du/rcar_du_group.h | 2 +
drivers/gpu/drm/rcar-du/rcar_du_kms.c | 106 ++++++++
drivers/gpu/drm/rcar-du/rcar_du_regs.h | 5 +
19 files changed, 697 insertions(+), 7 deletions(-)
create mode 100644 Documentation/devicetree/bindings/display/renesas,cmm.yaml
create mode 100644 drivers/gpu/drm/rcar-du/rcar_cmm.c
create mode 100644 drivers/gpu/drm/rcar-du/rcar_cmm.h

--
2.23.0

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