From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DF109C6FD1D for ; Tue, 21 Mar 2023 12:02:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231168AbjCUMC6 (ORCPT ); Tue, 21 Mar 2023 08:02:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45780 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229822AbjCUMCz (ORCPT ); Tue, 21 Mar 2023 08:02:55 -0400 Received: from lelv0142.ext.ti.com (lelv0142.ext.ti.com [198.47.23.249]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D412818A83; Tue, 21 Mar 2023 05:02:46 -0700 (PDT) Received: from fllv0035.itg.ti.com ([10.64.41.0]) by lelv0142.ext.ti.com (8.15.2/8.15.2) with ESMTP id 32LC2Kxw113141; Tue, 21 Mar 2023 07:02:20 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1679400140; bh=RmbmhgCa8+U7icS0fTHWPYo6SizfHxfnN91iZUtJfZE=; h=Date:Subject:To:CC:References:From:In-Reply-To; b=ljW6YZMpmlmNCmaQLB49LKcQBk5fJMEEByQ8l4yAgLl7RUUme3ehc7E1aNTRfF7x2 Uc3R4GOV7a2xmUnaG6w4ynP65EUfl0QDt39g1YKIRwjErGW/ob1mzdQ+8/LuXFqpDQ FLHZgH2AkrrawgZXtNVFos/8JzXgk7aieLNU1Nyg= Received: from DFLE113.ent.ti.com (dfle113.ent.ti.com [10.64.6.34]) by fllv0035.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 32LC2KoB031034 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 21 Mar 2023 07:02:20 -0500 Received: from DFLE106.ent.ti.com (10.64.6.27) by DFLE113.ent.ti.com (10.64.6.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.16; Tue, 21 Mar 2023 07:02:19 -0500 Received: from lelv0327.itg.ti.com (10.180.67.183) by DFLE106.ent.ti.com (10.64.6.27) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.16 via Frontend Transport; Tue, 21 Mar 2023 07:02:20 -0500 Received: from [172.24.145.160] (ileaxei01-snat.itg.ti.com [10.180.69.5]) by lelv0327.itg.ti.com (8.15.2/8.15.2) with ESMTP id 32LC2CWj124142; Tue, 21 Mar 2023 07:02:13 -0500 Message-ID: <79ce5fe8-9fb0-5caa-67a0-87dee7867856@ti.com> Date: Tue, 21 Mar 2023 17:32:12 +0530 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.8.0 Subject: Re: [PATCH 1/2] dt-bindings: drm/bridge: Add no-hpd property To: Krzysztof Kozlowski , , , CC: , , , , , , , , , , , , , , , , , , , , References: <20230316140823.234263-1-j-choudhary@ti.com> <20230316140823.234263-2-j-choudhary@ti.com> Content-Language: en-US From: Jayesh Choudhary In-Reply-To: Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.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 >> >> Add no-hpd property to the bindings, to disable >> hpd when not connected or unusable >> >> Signed-off-by: Rahul T R >> Signed-off-by: Jayesh Choudhary >> --- >> .../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 >