[PATCH v9 15/17] drm: bridge: analogix/dp: try force hpd after plug in lookup failed

[Yakir Yang]

Hi Rob,

On 11/12/2015 07:10 AM, Rob Herring wrote:
> On Fri, Oct 30, 2015 at 09:09:15AM +0800, Yakir Yang wrote:
>> Some edp screen do not have hpd signal, so we can't just return
>> failed when hpd plug in detect failed.
>>
>> This is an hardware property, so we need add a devicetree property
>> "analogix,need-force-hpd" to indicate this sutiation.
>>
>> Tested-by: Heiko Stuebner <heiko at sntech.de>
>> Tested-by: Javier Martinez Canillas <javier at osg.samsung.com>
>> Signed-off-by: Yakir Yang <ykk at rock-chips.com>
>> ---
> I didn't find this one in v10. Did it get dropped?

You are in my 'to' list, but I haven't send the whole v10 out,
most of them don't need update :)

This series should be:
---- [v8 0/17 ...]
   |---- [v8 1/17 ...]
   |---- [v8 2/17 ...]
   |---- [v8 3/17 ...]
   |---- [...]
   |---- [v8 15/17 ...]
   |---- [v8 16/17 ...]
   |---- [v8 17/17 ...]
   |
   |---- [v9 10/17 ...]
   |---- [v9 15/17 ...]
      |---- We are here
   |---- [v9 09/17 ...]
   |---- [v10 09/17 ...]
      |---- Received an acked from you

>
>> Changes in v9: None
>> Changes in v8: None
>> Changes in v7: None
>> Changes in v6: None
>> Changes in v5: None
>> Changes in v4: None
>> Changes in v3:
>> - Add "analogix,need-force-hpd" to indicate whether driver need foce
>>    hpd when hpd detect failed.
>>
>> Changes in v2: None
>>
>>   .../bindings/display/bridge/analogix_dp.txt        |  4 ++-
>>   .../bindings/display/exynos/exynos_dp.txt          |  1 +
>>   .../display/rockchip/analogix_dp-rockchip.txt      |  1 +
>>   drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 36 +++++++++++++++++++---
>>   drivers/gpu/drm/bridge/analogix/analogix_dp_core.h |  2 ++
>>   drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c  |  9 ++++++
>>   6 files changed, 47 insertions(+), 6 deletions(-)
>>
>> diff --git a/Documentation/devicetree/bindings/display/bridge/analogix_dp.txt b/Documentation/devicetree/bindings/display/bridge/analogix_dp.txt
>> index 7659a7a..74f0e80 100644
>> --- a/Documentation/devicetree/bindings/display/bridge/analogix_dp.txt
>> +++ b/Documentation/devicetree/bindings/display/bridge/analogix_dp.txt
>> @@ -22,6 +22,9 @@ Required properties for dp-controller:
>>   		from general PHY binding: Should be "dp".
>>   
>>   Optional properties for dp-controller:
>> +	-analogix,need-force-hpd:
>> +		Indicate driver need force hpd when hpd detect failed, this
>> +		is used for some eDP screen which don't have hpd signal.
> This should be a generic property.

This property would only need in some no-hpd case, it would be dropped if
panel keep the hotplug signal, that's why I thought it should be optional.

I thought if we put this a property to generic property, then we must need
to define it in normal device node, not sure whether it is right :)

Thanks,
- Yakir

>
> Rob
>
>
>

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