From patchwork Wed Nov 27 10:30:31 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrej Picej X-Patchwork-Id: 13887405 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0F326D6D248 for ; Wed, 27 Nov 2024 22:47:34 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id F1E9A10EBF8; Wed, 27 Nov 2024 22:47:28 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=norik.com header.i=@norik.com header.b="ApVr8M+K"; dkim-atps=neutral Received: from cpanel.siel.si (cpanel.siel.si [46.19.9.99]) by gabe.freedesktop.org (Postfix) with ESMTPS id 39C4510E227 for ; Wed, 27 Nov 2024 11:00:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=norik.com; s=default; h=Content-Transfer-Encoding:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=rpRTZD3rQ6fcXSI3x3w5V3GlJGBpXq/aq88YWpZoftc=; b=ApVr8M+KE8vU+gn1q1aC7Yityx sc2dSDSVljqDpPiLxEuKKjC56nYdwV+6qQEr77t98vVZDzEMonvqIViilqBtQ7SPHE+R5qA/4aGn1 FCz2gvHkJPXDbhhz3O1mjgBZVKTByGb/Lsyk5vheI/OZlMFxMP2slbvwgAG2icK7io4ZmQJKVjCt2 9jpkHkEhbYTkueW9W0aZLCuZQFbXaHtm1EJds5gVT+66khGh8PLc/BHaG79e0LcCuVwQy3wFzMM+s raW1Kme0Yw+IKP3nCRg5VMcmOxsncUJH3kg2J41NtT0VZKFztl3VqZMP9e1OW2794Y/opJTmNk+cT OuW3tWDw==; Received: from [89.212.21.243] (port=49750 helo=and-HP-Z4..) by cpanel.siel.si with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96.2) (envelope-from ) id 1tGFK9-007Rx6-0K; Wed, 27 Nov 2024 11:31:08 +0100 From: Andrej Picej To: 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, simona@ffwll.ch, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, marex@denx.de Cc: dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org Subject: [PATCH 3/3] arm64: dts: imx8mm-phyboard-polis-peb-av-10: Set custom lvds_vcom Date: Wed, 27 Nov 2024 11:30:31 +0100 Message-Id: <20241127103031.1007893-4-andrej.picej@norik.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241127103031.1007893-1-andrej.picej@norik.com> References: <20241127103031.1007893-1-andrej.picej@norik.com> MIME-Version: 1.0 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - cpanel.siel.si X-AntiAbuse: Original Domain - lists.freedesktop.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - norik.com X-Get-Message-Sender-Via: cpanel.siel.si: authenticated_id: andrej.picej@norik.com X-Authenticated-Sender: cpanel.siel.si: andrej.picej@norik.com X-Source: X-Source-Args: X-Source-Dir: X-Mailman-Approved-At: Wed, 27 Nov 2024 22:47:27 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Set custom differential output voltage for LVDS, to fulfill requirements of the connected display. LVDS diferential voltage for data-lanes and clock output has to be between 200 mV and 600 mV. Driver sets 200 Ohm near-end termination by default and since LVDS_VCOM_CHA_LVDS_VOD_SWING (0x19) [3:2] sets both data-lane and clock output voltage we have to set the register to the value of 0x0C (0b11 << 2): - Steady-state differential output voltage for LVDS data-lanes: min: 300 mV, typ: 402 mV, max: 511 mV - Steady-state differential output voltage for LVDS clock lane: min: 234 mV, typ: 314 mV, max: 399 mV Signed-off-by: Andrej Picej --- .../boot/dts/freescale/imx8mm-phyboard-polis-peb-av-10.dtso | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/boot/dts/freescale/imx8mm-phyboard-polis-peb-av-10.dtso b/arch/arm64/boot/dts/freescale/imx8mm-phyboard-polis-peb-av-10.dtso index a9de42cf14be..709b555ca753 100644 --- a/arch/arm64/boot/dts/freescale/imx8mm-phyboard-polis-peb-av-10.dtso +++ b/arch/arm64/boot/dts/freescale/imx8mm-phyboard-polis-peb-av-10.dtso @@ -179,6 +179,7 @@ port@0 { bridge_in: endpoint { remote-endpoint = <&dsi_out>; data-lanes = <1 2 3 4>; + ti,lvds-vcom = <0x0C>; }; };