linux-kernel - Re: [PATCH v8 1/6] drm/mediatek: Use regmap for register access

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Message-ID: <0b2046b9-90de-c894-7502-993b5df12e7a@infradead.org>
Date:   Thu, 20 Feb 2020 15:48:12 -0800
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        robh+dt@...nel.org, mark.rutland@....com, ck.hu@...iatek.com,
        p.zabel@...gutronix.de, airlied@...ux.ie, mturquette@...libre.com,
        sboyd@...nel.org, ulrich.hecht+renesas@...il.com,
        laurent.pinchart@...asonboard.com
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        dri-devel@...ts.freedesktop.org, Weiyi Lu <weiyi.lu@...iatek.com>,
        Seiya Wang <seiya.wang@...iatek.com>,
        linux-clk@...r.kernel.org,
        Collabora Kernel ML <kernel@...labora.com>,
        mtk01761 <wendell.lin@...iatek.com>,
        Allison Randal <allison@...utok.net>,
        Thomas Gleixner <tglx@...utronix.de>, wens@...e.org,
        Kate Stewart <kstewart@...uxfoundation.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Houlong Wei <houlong.wei@...iatek.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        linux-media@...r.kernel.org, devicetree@...r.kernel.org,
        sean.wang@...iatek.com, frank-w@...lic-files.de,
        Minghsiu Tsai <minghsiu.tsai@...iatek.com>,
        Andrew-CT Chen <andrew-ct.chen@...iatek.com>,
        linux-mediatek@...ts.infradead.org, hsinyi@...omium.org,
        Matthias Brugger <mbrugger@...e.com>,
        linux-arm-kernel@...ts.infradead.org,
        Richard Fontana <rfontana@...hat.com>,
        linux-kernel@...r.kernel.org, matthias.bgg@...nel.org,
        Daniel Vetter <daniel@...ll.ch>
Subject: Re: [PATCH v8 1/6] drm/mediatek: Use regmap for register access

On 2/20/20 9:21 AM, Enric Balletbo i Serra wrote:
> From: Matthias Brugger <mbrugger@...e.com>
> 
> The mmsys memory space is shared between the drm and the
> clk driver. Use regmap to access it.
> 
> Signed-off-by: Matthias Brugger <mbrugger@...e.com>
> Reviewed-by: Philipp Zabel <p.zabel@...gutronix.de>
> Reviewed-by: CK Hu <ck.hu@...iatek.com>
> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>
> ---
> 
> Changes in v8: None
> Changes in v7:
> - Add R-by from CK
> 
>  drivers/gpu/drm/mediatek/mtk_drm_crtc.c |  4 +-
>  drivers/gpu/drm/mediatek/mtk_drm_ddp.c  | 50 +++++++++++--------------
>  drivers/gpu/drm/mediatek/mtk_drm_ddp.h  |  4 +-
>  drivers/gpu/drm/mediatek/mtk_drm_drv.c  | 13 ++-----
>  drivers/gpu/drm/mediatek/mtk_drm_drv.h  |  2 +-
>  5 files changed, 30 insertions(+), 43 deletions(-)

Hi. Just a quick question:

Do you need to select REGMAP or one of its derivatives to make sure
that the proper interfaces are available for this driver?

thanks.
-- 
~Randy