linux-kernel - Re: [PATCH 4/8] drm/sun4i: add support for sun8i DE2 mixers and display engines

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Date:   Thu, 23 Feb 2017 17:44:54 +0000
From:   Emil Velikov <emil.l.velikov@...il.com>
To:     Icenowy Zheng <icenowy@...c.xyz>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Maxime Ripard <maxime.ripard@...e-electrons.com>,
        Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        David Airlie <airlied@...ux.ie>,
        Jean-Francois Moine <moinejf@...e.fr>,
        devicetree <devicetree@...r.kernel.org>,
        "Linux-Kernel@...r. Kernel. Org" <linux-kernel@...r.kernel.org>,
        ML dri-devel <dri-devel@...ts.freedesktop.org>,
        linux-sunxi@...glegroups.com, linux-clk@...r.kernel.org,
        LAKML <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 4/8] drm/sun4i: add support for sun8i DE2 mixers and
 display engines

On 22 February 2017 at 15:18, Icenowy Zheng <icenowy@...c.xyz> wrote:
> Allwinner have a new "Display Engine 2.0" in there new SoCs, which comes
> in a new "Display Engine" (mixers instead of old backends and
> frontends).
>
> Add support for the mixer on Allwinner V3s SoC; it's the simplest one.
>
> Signed-off-by: Icenowy Zheng <icenowy@...c.xyz>
> ---
>  drivers/gpu/drm/sun4i/Kconfig       |   8 +
>  drivers/gpu/drm/sun4i/Makefile      |   1 +
>  drivers/gpu/drm/sun4i/sun4i_crtc.c  |   6 +-
>  drivers/gpu/drm/sun4i/sun4i_drv.c   |  38 +++-
>  drivers/gpu/drm/sun4i/sun4i_drv.h   |   1 +
>  drivers/gpu/drm/sun4i/sun4i_layer.c |  92 ++++++--
>  drivers/gpu/drm/sun4i/sun4i_layer.h |   1 +
>  drivers/gpu/drm/sun4i/sun8i_mixer.c | 417 ++++++++++++++++++++++++++++++++++++
>  drivers/gpu/drm/sun4i/sun8i_mixer.h | 133 ++++++++++++
>  9 files changed, 674 insertions(+), 23 deletions(-)
Silly question:

Does this series cover the same functionality/hardware as the separate
sun8i driver proposed a few months back ?
The diff stat looks quite different (~1.6k vs ~0.6k), although that
could be due to reusing the existing sun4i code.

Thanks
Emil