Re: [v2 00/10] arm/arm64: mediatek: Fix mmsys device probing

From: Matthias Brugger <matthias.bgg@gmail.com>
To: Lee Jones <lee.jones@linaro.org>, matthias.bgg@kernel.org
Cc: ulrich.hecht+renesas@gmail.com,
	laurent.pinchart@ideasonboard.com, ck.hu@mediatek.com,
	p.zabel@pengutronix.de, airlied@linux.ie, robh+dt@kernel.org,
	mark.rutland@arm.com, mturquette@baylibre.com,
	sboyd@codeaurora.org, davem@davemloft.net,
	gregkh@linuxfoundation.org, mchehab@kernel.org,
	rdunlap@infradead.org, pi-cheng.chen@linaro.org,
	sean.wang@mediatek.com, linux-clk@vger.kernel.org,
	linux@armlinux.org.uk, dri-devel@lists.freedesktop.org,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-mediatek@lists.infradead.org,
	Matthias Brugger <mbrugger@suse.com>
Subject: Re: [v2 00/10] arm/arm64: mediatek: Fix mmsys device probing
Date: Tue, 24 Apr 2018 11:46:13 +0200	[thread overview]
Message-ID: <723392d5-ee51-d49b-050b-db4f9709e6bf@gmail.com> (raw)
In-Reply-To: <20180424054854.bpd6h3imazhqnuy3@dell>

Hi Lee,

On 04/24/2018 07:48 AM, Lee Jones wrote:
> On Mon, 23 Apr 2018, matthias.bgg@kernel.org wrote:
> 
>> From: Matthias Brugger <mbrugger@suse.com>
>>
>> Changes since v1:
>> - add binding documentation
>> - ddp: use regmap_update_bits
>> - ddp: ignore EPROBE_DEFER on clock probing
>> - mfd: delete mmsys_private
>> - add Reviewed-by and Acked-by tags
> 
> I'm confused by the double submission.
> 
> Please can you send it again completely detached from the first and
> the second submissions please?
> 

I had some problems with my mailclient. I'll resend as 'v2 resend'.

Sorry for that.
Matthias

>> ---
>>
>> MMSYS in Mediatek SoCs has some registers to control clock gates (which is 
>> used in the clk driver) and some registers to set the routing and enable
>> the differnet blocks of the display subsystem.
>>
>> Up to now both drivers, clock and drm are probed with the same device tree
>> compatible. But only the first driver get probed, which in effect breaks
>> graphics on mt8173 and mt2701.
>>
>> This patch set introduces a new mfd device, which binds against the mmsys
>> compatible and takes care of probing the needed devices. It was tested on the
>> bananapi-r2 and the Acer R13 Chromebook.
>>
>>
>> Matthias Brugger (10):
>>   dt-bindings: mediatek: mmsys: Add support for mfd
>>   drm/mediatek: Use regmap for register access
>>   mfd: mtk-mmsys: Add mmsys driver
>>   drm/mediatek: mt2701: switch to mfd probing.
>>   clk: mediatek: mt2701-mm: switch to mfd device
>>   mfd: mtk-mmsys: Add mt8173 nodes
>>   drm/mediatek: Add mfd support for mt8173
>>   clk: mediatek: mt8173-mm: switch to mfd device
>>   drm: mediatek: Omit warning on probe defers
>>   MAINTAINERS: update Mediatek Soc entry
>>
>>  .../bindings/arm/mediatek/mediatek,mmsys.txt       |  2 -
>>  .../bindings/display/mediatek/mediatek,disp.txt    |  2 +-
>>  .../devicetree/bindings/mfd/mediatek,mmsys.txt     | 27 +++++++
>>  MAINTAINERS                                        |  2 +
>>  drivers/clk/mediatek/clk-mt2701-mm.c               | 10 +--
>>  drivers/clk/mediatek/clk-mt8173.c                  | 17 +++-
>>  drivers/gpu/drm/mediatek/mtk_drm_crtc.c            |  4 +-
>>  drivers/gpu/drm/mediatek/mtk_drm_ddp.c             | 41 ++++------
>>  drivers/gpu/drm/mediatek/mtk_drm_ddp.h             |  4 +-
>>  drivers/gpu/drm/mediatek/mtk_drm_drv.c             | 33 ++++----
>>  drivers/gpu/drm/mediatek/mtk_drm_drv.h             |  2 +-
>>  drivers/mfd/Kconfig                                |  9 +++
>>  drivers/mfd/Makefile                               |  2 +
>>  drivers/mfd/mtk-mmsys.c                            | 93 ++++++++++++++++++++++
>>  14 files changed, 189 insertions(+), 59 deletions(-)
>>  create mode 100644 Documentation/devicetree/bindings/mfd/mediatek,mmsys.txt
>>  create mode 100644 drivers/mfd/mtk-mmsys.c
>>
> 