[PATCH 09/17] drm/sun4i: Add scaler library for DE2

Maxime Ripard
2017-11-28T20:40:19Z

Hi,

On Mon, Nov 27, 2017 at 09:57:42PM +0100, Jernej Skrabec wrote:
> Scaler library currently supports scaling only RGB planes on VI planes.
>
> Coefficients and algorithm which ones to select are taken from BSP driver.
>
> Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
> ---
> drivers/gpu/drm/sun4i/Makefile | 2 +-
> drivers/gpu/drm/sun4i/sun8i_scaler.c | 667 +++++++++++++++++++++++++++++++++++
> drivers/gpu/drm/sun4i/sun8i_scaler.h | 78 ++++
> 3 files changed, 746 insertions(+), 1 deletion(-)
> create mode 100644 drivers/gpu/drm/sun4i/sun8i_scaler.c
> create mode 100644 drivers/gpu/drm/sun4i/sun8i_scaler.h
>
> diff --git a/drivers/gpu/drm/sun4i/Makefile b/drivers/gpu/drm/sun4i/Makefile
> index 0c2f8c7facae..70df480792f9 100644
> --- a/drivers/gpu/drm/sun4i/Makefile
> +++ b/drivers/gpu/drm/sun4i/Makefile
> @@ -9,7 +9,7 @@ sun4i-drm-hdmi-y += sun4i_hdmi_enc.o
> sun4i-drm-hdmi-y += sun4i_hdmi_i2c.o
> sun4i-drm-hdmi-y += sun4i_hdmi_tmds_clk.o
>
> -sun8i-mixer-y += sun8i_mixer.o sun8i_layer.o
> +sun8i-mixer-y += sun8i_mixer.o sun8i_layer.o sun8i_scaler.o
>
> sun4i-tcon-y += sun4i_crtc.o
> sun4i-tcon-y += sun4i_dotclock.o
> diff --git a/drivers/gpu/drm/sun4i/sun8i_scaler.c b/drivers/gpu/drm/sun4i/sun8i_scaler.c
> new file mode 100644
> index 000000000000..23525beceaa2
> --- /dev/null
> +++ b/drivers/gpu/drm/sun4i/sun8i_scaler.c
> @@ -0,0 +1,667 @@
> +/*
> + * Copyright (C) 2017 Jernej Skrabec <jernej.skrabec@siol.net>
> + *
> + * Coefficients are taken from BSP driver, which is:
> + * Copyright (C) 2014-2015 Allwinner

Saying from which BSP you got them would be great for future reference

It looks good otherwise. I kind of hate those big array of
undocumented data, but there's nothing you can do about it either, so
we'll have to deal with it :)

Thanks!
Maxime

--
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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