From: Jayesh Choudhary <j-choudhary@ti.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
<dri-devel@lists.freedesktop.org>, <devicetree@vger.kernel.org>,
<linux-kernel@vger.kernel.org>
Cc: <andrzej.hajda@intel.com>, <neil.armstrong@linaro.org>,
<rfoss@kernel.org>, <Laurent.pinchart@ideasonboard.com>,
<jonas@kwiboo.se>, <jernej.skrabec@gmail.com>,
<airlied@gmail.com>, <daniel@ffwll.ch>, <robh+dt@kernel.org>,
<krzysztof.kozlowski+dt@linaro.org>, <sam@ravnborg.org>,
<jani.nikula@intel.com>, <tzimmermann@suse.de>,
<javierm@redhat.com>, <ville.syrjala@linux.intel.com>,
<r-ravikumar@ti.com>, <lyude@redhat.com>,
<alexander.deucher@amd.com>, <sjakhade@cadence.com>,
<yamonkar@cadence.com>, <a-bhatia1@ti.com>
Subject: Re: [PATCH 1/2] dt-bindings: drm/bridge: Add no-hpd property
Date: Tue, 21 Mar 2023 17:32:12 +0530 [thread overview]
Message-ID: <79ce5fe8-9fb0-5caa-67a0-87dee7867856@ti.com> (raw)
In-Reply-To: <dbc43c09-f8ec-f877-598a-adff47d44b0e@linaro.org>
Hello Krzysztof,
On 17/03/23 18:08, Krzysztof Kozlowski wrote:
> On 16/03/2023 15:08, Jayesh Choudhary wrote:
>> From: Rahul T R <r-ravikumar@ti.com>
>>
>> Add no-hpd property to the bindings, to disable
>> hpd when not connected or unusable
>>
>> Signed-off-by: Rahul T R <r-ravikumar@ti.com>
>> Signed-off-by: Jayesh Choudhary <j-choudhary@ti.com>
>> ---
>> .../devicetree/bindings/display/bridge/cdns,mhdp8546.yaml | 6 ++++++
>> 1 file changed, 6 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/display/bridge/cdns,mhdp8546.yaml b/Documentation/devicetree/bindings/display/bridge/cdns,mhdp8546.yaml
>> index b2e8bc6da9d0..69d381195218 100644
>> --- a/Documentation/devicetree/bindings/display/bridge/cdns,mhdp8546.yaml
>> +++ b/Documentation/devicetree/bindings/display/bridge/cdns,mhdp8546.yaml
>> @@ -57,6 +57,12 @@ properties:
>> interrupts:
>> maxItems: 1
>>
>> + cdns,no-hpd:
>
> There is already no-hpd property.
>
>> + type: boolean
>> + description:
>> + Set if the HPD line on the bridge isn't hooked up to anything or is
>> + otherwise unusable.
>
> It's the property of the panel, not bridge. Unless you want to say that
> bridge physically does not have HPD? Does it follow the standard in such
> case?
MHDP does have hpd. But the mhdp driver should handle the cases when the
hpd pin of bridge is not connected to that of the DP-connector. This is
to add support for that. (optional property)
-Jayesh
>
> Best regards,
> Krzysztof
>
next prev parent reply other threads:[~2023-03-21 12:02 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-16 14:08 [PATCH 0/2] "no-hpd" support in CDNS DP bridge driver Jayesh Choudhary
2023-03-16 14:08 ` [PATCH 1/2] dt-bindings: drm/bridge: Add no-hpd property Jayesh Choudhary
2023-03-17 12:38 ` Krzysztof Kozlowski
2023-03-21 12:02 ` Jayesh Choudhary [this message]
2023-03-21 12:38 ` Krzysztof Kozlowski
2023-03-21 14:28 ` Jayesh Choudhary
2023-03-21 15:17 ` Krzysztof Kozlowski
2023-03-23 12:26 ` Jayesh Choudhary
2023-03-16 14:08 ` [PATCH 2/2] drm: bridge: cdns-mhdp8546: Add support for no-hpd Jayesh Choudhary
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