* Re: [PATCH v5] drm/fsl-dcu: Implement gamma_lut atomic crtc properties
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@ 2016-10-08 22:26 ` Rob Herring
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From: Rob Herring @ 2016-10-08 22:26 UTC (permalink / raw)
To: Meng Yi, linux-arm-kernel; +Cc: stefan
On Wed, Sep 28, 2016 at 04:24:29PM +0800, Meng Yi wrote:
> Gamma correction is optional and can be used to adjust the color
> output values to match the gamut of a particular TFT LCD panel
>
> Split the DCU regs into "regs", "palette", "gamma" and "cursor".
> Create a second regmap for gamma memory space using little endian.
> The registers after the first address space are not accessed yet,
> hence new device trees would even work with old kernels. Just new
> kernel need the new format so we can access the separate gamma
> reg space.
>
> Suggested-by: Stefan Agner <stefan@agner.ch>
> Signed-off-by: Meng Yi <meng.yi@nxp.com>
> ---
> Changes since V1:
> -created a second regmap for gamma
> -updated the DCU DT binding
> -removed Kconfig for gamma and enable gamma when valid data filled.
> -extended and simplified comment lines.
> ---
> .../devicetree/bindings/display/fsl,dcu.txt | 12 +++++++-
Acked-by: Rob Herring <robh@kernel.org>
> drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_crtc.c | 33 ++++++++++++++++++++
> drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c | 35 +++++++++++++++++++++-
> drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.h | 7 +++++
> 4 files changed, 85 insertions(+), 2 deletions(-)
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