From patchwork Wed Apr 5 14:24:39 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jayesh Choudhary X-Patchwork-Id: 670576 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 93FBAC7619A for ; Wed, 5 Apr 2023 14:25:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237972AbjDEOZY (ORCPT ); Wed, 5 Apr 2023 10:25:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54514 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238280AbjDEOZV (ORCPT ); Wed, 5 Apr 2023 10:25:21 -0400 Received: from lelv0143.ext.ti.com (lelv0143.ext.ti.com [198.47.23.248]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 993564EFD; Wed, 5 Apr 2023 07:25:13 -0700 (PDT) Received: from fllv0034.itg.ti.com ([10.64.40.246]) by lelv0143.ext.ti.com (8.15.2/8.15.2) with ESMTP id 335EOhSK059451; Wed, 5 Apr 2023 09:24:43 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1680704683; bh=qDO37Rl2u94OwUVPnEAZxBPCa+75piDWj4gv5a2V2Zc=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=fryHPY1mKzdLY30aiXYYZCvvFh7EQQgCwL3LiFwtyzgwyq+wJ14EzQvP+dzhWrGb/ VRB9i0mIT4ZgujImeAPThTeFi5LDvAxZkIvIFk+BXL0Y/wXXrnWmFjmxiggCkZhxyc E4NnR9mZ8myUIwSTVCfqaeDxY/c374a4CWz1hTHk= Received: from DLEE109.ent.ti.com (dlee109.ent.ti.com [157.170.170.41]) by fllv0034.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 335EOhTO064579 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 5 Apr 2023 09:24:43 -0500 Received: from DLEE110.ent.ti.com (157.170.170.21) by DLEE109.ent.ti.com (157.170.170.41) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.16; Wed, 5 Apr 2023 09:24:43 -0500 Received: from lelv0326.itg.ti.com (10.180.67.84) by DLEE110.ent.ti.com (157.170.170.21) 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; Wed, 5 Apr 2023 09:24:43 -0500 Received: from localhost (ileaxei01-snat2.itg.ti.com [10.180.69.6]) by lelv0326.itg.ti.com (8.15.2/8.15.2) with ESMTP id 335EOgNt014784; Wed, 5 Apr 2023 09:24:43 -0500 From: Jayesh Choudhary To: , , , CC: , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v2 1/2] dt-bindings: drm/bridge: Add no-hpd property Date: Wed, 5 Apr 2023 19:54:39 +0530 Message-ID: <20230405142440.191939-2-j-choudhary@ti.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230405142440.191939-1-j-choudhary@ti.com> References: <20230405142440.191939-1-j-choudhary@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org From: Rahul T R The mhdp bridge can work without its HPD pin hooked up to the connector, but the current bridge driver throws an error when hpd line is not connected to the connector. For such cases, we need an indication for no-hpd, using which we can bypass the hpd detection and instead use the auxiliary channels connected to the DP connector to confirm the connection. So 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 c2b369456e4e..3a6c6d837593 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: + type: boolean + description: + Set if the HPD line on the bridge isn't hooked up to anything or is + otherwise unusable. + ports: $ref: /schemas/graph.yaml#/properties/ports