linux-kernel - Re: [RFC 00/12] Add DRM Exynos HDMI on SoCs from Exynos4 family

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Message-ID: <CAAQKjZNmmn0rs10456GQ20zZJLp0Qh3Q4i2_eRqERmxyhLZWSQ@mail.gmail.com>
Date:	Mon, 28 Oct 2013 22:42:18 +0900
From:	Inki Dae <inki.dae@...sung.com>
To:	Tomasz Stanislawski <t.stanislaws@...sung.com>
Cc:	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-samsung-soc@...r.kernel.org" 
	<linux-samsung-soc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Kukjin Kim <kgene.kim@...sung.com>, mturquette@...aro.org,
	Seung-Woo Kim <sw0312.kim@...sung.com>,
	DRI mailing list <dri-devel@...ts.freedesktop.org>,
	Kishon Vijay Abraham I <kishon@...com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Sylwester Nawrocki <s.nawrocki@...sung.com>,
	Rahul Sharma <rahul.sharma@...sung.com>
Subject: Re: [RFC 00/12] Add DRM Exynos HDMI on SoCs from Exynos4 family

Hi Tomasz,

I have merged the re-factoring patch set from Sean Paul. Can you
re-base your patch set at top of exynos-drm-next?

Thanks,
Inki Dae

2013/10/21 Tomasz Stanislawski <t.stanislaws@...sung.com>:
> This patchset adds support for HDMI at SoCs from Exynos4 family. The patches
> are rebased on kishon/next. Additionally, The patchset contains small fixes to
> PHY and CLK frameworks.  I preferred to keep all the patches together for the
> first version of the RFC.
>
> The interesting part might be 'propagation of clk_set_parent()'.  This feature
> allows to remove the usage of artificial clocks in drivers.  Such a situation
> happens for Exynos HDMI and 'mout_hdmi' where the clock is not even mentioned in
> some versions of SoC's documentation. Since enabling and setting rate can be
> propagated I think that clk_set_parent() should also be propagated. This would
> simplify driver's code and make it less dependant on SoC's version.
>
> Another interesting feature refers to simple PHY driver.  This driver register
> a PHY interface that operates by setting a special bit in platform register.
> This situation is very common in Exynos SoCs.  The current version supports
> only one phy per node.  The code might be modified to support multiple phys
> from single simple-phy provider to avoid creation of multiple nodes in DT.
>
> All comments are welcome.
>
> Regards,
> Tomasz Stanislawski
>
>
> Tomasz Stanislawski (12):
>   clk: propagate parent change up one level
>   clk: exynos4: export sclk_hdmiphy clock
>   clk: exynos4: enable clk_set_parent() propagation for sclk_hdmi and
>     sclk_mixer clocks
>   phy: Add simple-phy driver
>   phy: use of_phy_simple_xlate for NULL xlate function
>   Revert "drm/exynos: add mout_hdmi clock in hdmi driver to change
>     parent"
>   drm: exynos: hdmi: use hdmiphy as PHY
>   drm: exynos: hdmi: simplify extracting hpd-gpio from DT
>   drm: exynos: add compatibles for HDMI and Mixer chips and exynos4210
>     SoC
>   arm: dts: exynos4: add i2c controller for HDMIPHY
>   arm: dts: exynos4: add HDMI devices
>   arm: dts: universal_c210: add HDMI devices
>
>  .../devicetree/bindings/clock/exynos4-clock.txt    |    1 +
>  arch/arm/boot/dts/exynos4.dtsi                     |   43 +++++++
>  arch/arm/boot/dts/exynos4210-universal_c210.dts    |   53 ++++++++
>  arch/arm/boot/dts/exynos4210.dtsi                  |    4 +
>  drivers/clk/clk.c                                  |    6 +
>  drivers/clk/samsung/clk-exynos4.c                  |   10 +-
>  drivers/gpu/drm/exynos/exynos_hdmi.c               |   41 +++----
>  drivers/gpu/drm/exynos/exynos_mixer.c              |    3 +
>  drivers/phy/Kconfig                                |    5 +
>  drivers/phy/Makefile                               |    1 +
>  drivers/phy/phy-core.c                             |    2 +-
>  drivers/phy/phy-simple.c                           |  128 ++++++++++++++++++++
>  include/linux/clk-provider.h                       |    1 +
>  13 files changed, 269 insertions(+), 29 deletions(-)
>  create mode 100644 drivers/phy/phy-simple.c
>
> --
> 1.7.9.5
>
> _______________________________________________
> dri-devel mailing list
> dri-devel@...ts.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/dri-devel
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