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+ren... v3: https://lore.kernel.org/linux-renesas-soc/20190825135154.11488-1-jacopo+rene...

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=3c6af4db165e5b3dc89... 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=fe178a43861da7c8e79...

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

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