linux-kernel - Re: [PATCH v10 11/11] drm: bridge/dw_hdmi: add rockchip rk3288 support

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Date:	Fri, 14 Nov 2014 19:21:36 +0800
From:	Andy Yan <andy.yan@...k-chips.com>
To:	Zubair Lutfullah Kakakhel <Zubair.Kakakhel@...tec.com>,
	airlied@...ux.ie, heiko@...ech.de, fabio.estevam@...escale.com,
	rmk+kernel@....linux.org.uk
CC:	Mark Rutland <mark.rutland@....com>,
	dri-devel@...ts.freedesktop.org, ykk@...k-chips.com,
	devel@...verdev.osuosl.org, Arnd Bergmann <arnd@...db.de>,
	linux-rockchip@...ts.infradead.org,
	Grant Likely <grant.likely@...aro.org>,
	Dave Airlie <airlied@...hat.com>, jay.xu@...k-chips.com,
	devicetree@...r.kernel.org, Pawel Moll <pawel.moll@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Inki Dae <inki.dae@...sung.com>,
	Rob Herring <robh+dt@...nel.org>,
	Sean Paul <seanpaul@...omium.org>, mark.yao@...k-chips.com,
	Josh Boyer <jwboyer@...hat.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org, djkurtz@...gle.com,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Kumar Gala <galak@...eaurora.org>,
	Shawn Guo <shawn.guo@...aro.org>,
	Lucas Stach <l.stach@...gutronix.de>
Subject: Re: [PATCH v10 11/11] drm: bridge/dw_hdmi: add rockchip rk3288 support


On 2014年11月14日 19:16, Zubair Lutfullah Kakakhel wrote:
>
> On 14/11/14 11:13, Andy Yan wrote:
>> On 2014年11月14日 18:53, Zubair Lutfullah Kakakhel wrote:
>>> On 14/11/14 10:37, Andy Yan wrote:
>>>> On 2014年11月14日 18:23, Zubair Lutfullah Kakakhel wrote:
>>>>> Hi Andy
>>>>>
>>>>> On 14/11/14 03:31, Andy Yan wrote:
>>>>>> Rockchip RK3288 hdmi is compatible with dw_hdmi
>>>>>>
>>>>>> Signed-off-by: Andy Yan <andy.yan@...k-chips.com>
>>>>>>
>>>>>> ---
>>>>>>
>>>>>> Changes in v10:
>>>>>> - add more display mode support mpll configuration for rk3288
>>>>>>
>>>>>> Changes in v9:
>>>>>> - move some phy configuration to platform driver
>>>>>>
>>>>>> Changes in v8: None
>>>>>> Changes in v7: None
>>>>>> Changes in v6: None
>>>>>> Changes in v5: None
>>>>>> Changes in v4: None
>>>>>> Changes in v3: None
>>>>>> Changes in v2: None
>>>>>>
>>>>>>     drivers/gpu/drm/bridge/dw_hdmi.c            |  10 +
>>>>>>     drivers/gpu/drm/bridge/dw_hdmi.h            |   3 +-
>>>>>>     drivers/gpu/drm/rockchip/Kconfig            |  10 +
>>>>>>     drivers/gpu/drm/rockchip/Makefile           |   2 +-
>>>>>>     drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 355 ++++++++++++++++++++++++++++
>>>>>>     include/drm/bridge/dw_hdmi.h                |   1 +
>>>>>>     6 files changed, 379 insertions(+), 2 deletions(-)
>>>>>>     create mode 100644 drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
>>>>>>
>>>>>> diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c
>>>>>> index a2876fe..1dd1f0b 100644
>>>>>> --- a/drivers/gpu/drm/bridge/dw_hdmi.c
>>>>>> +++ b/drivers/gpu/drm/bridge/dw_hdmi.c
>>>>>> @@ -715,6 +715,13 @@ static void dw_hdmi_phy_enable_tmds(struct dw_hdmi *hdmi, u8 enable)
>>>>>>                  HDMI_PHY_CONF0_ENTMDS_MASK);
>>>>>>     }
>>>>>>     +static void dw_hdmi_phy_enable_spare(struct dw_hdmi *hdmi, u8 enable)
>>>>>> +{
>>>>>> +    hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
>>>>>> +             HDMI_PHY_CONF0_SPARECTRL_OFFSET,
>>>>>> +             HDMI_PHY_CONF0_SPARECTRL_MASK);
>>>>>> +}
>>>>>> +
>>>>> What does enable spare do? Can other future SoCs use it?
>>>>>
>>>>> This looks like DW specific. And can be a separate commit that adds a feature to the dw hdmi driver.
>>>>     Actually I am not very clearly about this bit, but RK3288 HDMI will not work without this bit enable.
>>>>     On imx6, the description about this bit is:Reserved. Spare pin control.
>>>>     On rk3288, the description is: svsret/sparectrl
>>>>      Both are very simple.
>>> Sounds like the IP Core in the rk3288 is slightly upgraded.
>>> Separate this section in a different commit as it is generic DW stuff.
>>>
>>> And add what you wrote above in the commit message.
>>    Only Separate function dw_hdmi_phy_enale_spare ? not include
>>    if (hdmi->dev_type == rk3288_hdmi)
>>                 dw_hdmi_enable_phy_spare(hdmi, 1);
>>   ?
> Yes. Separate dw_hdmi_phy_enable_spare and its associated defines
>   HDMI_PHY_CONF0_SPARECTRL_OFFSET
>   HDMI_PHY_CONF0_SPARECTRL_MASK
>   in the header
> as one commit.
>
>
> The if (hdmi->dev_type == rk3288_hdmi) code is part of the add rk3288 support.
>
> ZubairLK
   Many thanks :-)
> _______________________________________________
> Linux-rockchip mailing list
> Linux-rockchip@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-rockchip


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