From patchwork Wed Mar 9 15:11:08 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Biju Das X-Patchwork-Id: 12775192 X-Patchwork-Delegate: kieran@bingham.xyz 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 6B479C433EF for ; Wed, 9 Mar 2022 15:11:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232616AbiCIPMQ (ORCPT ); Wed, 9 Mar 2022 10:12:16 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40594 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233762AbiCIPMQ (ORCPT ); Wed, 9 Mar 2022 10:12:16 -0500 Received: from relmlie6.idc.renesas.com (relmlor2.renesas.com [210.160.252.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 759C7158EBA; Wed, 9 Mar 2022 07:11:16 -0800 (PST) X-IronPort-AV: E=Sophos;i="5.90,167,1643641200"; d="scan'208";a="113853367" Received: from unknown (HELO relmlir5.idc.renesas.com) ([10.200.68.151]) by relmlie6.idc.renesas.com with ESMTP; 10 Mar 2022 00:11:15 +0900 Received: from localhost.localdomain (unknown [10.226.92.170]) by relmlir5.idc.renesas.com (Postfix) with ESMTP id 8429E400D0EB; Thu, 10 Mar 2022 00:11:12 +0900 (JST) From: Biju Das To: David Airlie , Daniel Vetter , Rob Herring Cc: Biju Das , =?utf-8?q?Ricardo_Ca=C3=B1uelo?= , Laurent Pinchart , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, Geert Uytterhoeven , Chris Paterson , Biju Das , Prabhakar Mahadev Lad , linux-renesas-soc@vger.kernel.org Subject: [PATCH 1/2] dt-bindings: drm: bridge: adi,adv7533: Document adi,disable-lanes-override property Date: Wed, 9 Mar 2022 15:11:08 +0000 Message-Id: <20220309151109.20957-1-biju.das.jz@bp.renesas.com> X-Mailer: git-send-email 2.17.1 Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org On Renesas RZ/{G2L,V2L} platforms changing the lanes from 4 to 3 at lower frequencies causes display instability. On such platforms, it is better to avoid switching lanes from 4 to 3 as it needs different set of PLL parameter constraints to make the display stable with 3 lanes. This patch introduces 'adi,disable-lanes-override' property to disable lane switching at lower frequencies. Signed-off-by: Biju Das Reviewed-by: Lad Prabhakar --- .../devicetree/bindings/display/bridge/adi,adv7533.yaml | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/Documentation/devicetree/bindings/display/bridge/adi,adv7533.yaml b/Documentation/devicetree/bindings/display/bridge/adi,adv7533.yaml index f36209137c8a..2dc378039d21 100644 --- a/Documentation/devicetree/bindings/display/bridge/adi,adv7533.yaml +++ b/Documentation/devicetree/bindings/display/bridge/adi,adv7533.yaml @@ -84,6 +84,11 @@ properties: timings for HDMI output. type: boolean + adi,disable-lanes-override: + description: + Disables the overriding lanes at lower frequencies. + type: boolean + adi,dsi-lanes: description: Number of DSI data lanes connected to the DSI host. $ref: /schemas/types.yaml#/definitions/uint32