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 X-Spam-Level: X-Spam-Status: No, score=-3.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 88EDBC43381 for ; Sun, 24 Mar 2019 21:22:16 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 549FB20811 for ; Sun, 24 Mar 2019 21:22:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="U0XTZ1Ka" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 549FB20811 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=siol.net Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=rD1TXoQFka27vxMS1Z0RopI2USxhqmP2ypt0ij/XIqQ=; b=U0XTZ1KaaBHcZp deNy469tZ5LhGb+4P7fGhy315p/D1P5QJAp+q2tgFN5HfhPmyrd0dxQMIvSCzA5qZ0YBt+joTiLqy wFKhTePSt7m2e9rRngoAEWzbsvKGze0XfF2X4SJ2LSmQGExVQb1EmMXu4Xik7wvqmLlp0hc+f3xwt AsqSr32Ui30OekLGBtlUO28A5F8g7f46KXuTu1XR8FibfyxQuY6FdfL/TdKGuVsgbxYOgm9kLjI5q f67Gbj3tWKzWBIXYDBpCM2Dj9RrT7v6P+E0KI0Zliv3LN05dIWu47W6iA5UWkgQPlamSQg3WT33zM USBC62X/sPmiaLSpyFWg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1h8AZG-0002sI-Oo; Sun, 24 Mar 2019 21:22:10 +0000 Received: from mailoutvs21.siol.net ([185.57.226.212] helo=mail.siol.net) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1h8AZC-0002qh-03 for linux-arm-kernel@lists.infradead.org; Sun, 24 Mar 2019 21:22:07 +0000 Received: from localhost (localhost [127.0.0.1]) by mail.siol.net (Postfix) with ESMTP id 056C05218A8; Sun, 24 Mar 2019 22:21:58 +0100 (CET) X-Virus-Scanned: amavisd-new at psrvmta10.zcs-production.pri Received: from mail.siol.net ([127.0.0.1]) by localhost (psrvmta10.zcs-production.pri [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id wgpBJOIEJt6h; Sun, 24 Mar 2019 22:21:57 +0100 (CET) Received: from mail.siol.net (localhost [127.0.0.1]) by mail.siol.net (Postfix) with ESMTPS id ACAF05218B0; Sun, 24 Mar 2019 22:21:57 +0100 (CET) Received: from localhost.localdomain (cpe-86-58-52-202.static.triera.net [86.58.52.202]) (Authenticated sender: 031275009) by mail.siol.net (Postfix) with ESMTPSA id B3D7F5218A8; Sun, 24 Mar 2019 22:21:56 +0100 (CET) From: Jernej Skrabec To: maxime.ripard@bootlin.com Subject: [PATCH 0/2] drm/sun4i: dw-hdmi: Improve CEC support Date: Sun, 24 Mar 2019 22:21:41 +0100 Message-Id: <20190324212144.3652-1-jernej.skrabec@siol.net> X-Mailer: git-send-email 2.21.0 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190324_142206_236620_695D833D X-CRM114-Status: UNSURE ( 7.58 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: airlied@linux.ie, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, a.hajda@samsung.com, wens@csie.org, Laurent.pinchart@ideasonboard.com, daniel@ffwll.ch, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org It turns out that additional logic between HDMI CEC controller and pins on PHY on some Allwinner SoCs prevents proper communication. It might be possible to fix it, but it's much easier and less error prone to just directly drive pins using software implementation of CEC protocol. Let me know what do you think. Best regards, Jernej Jernej Skrabec (2): drm/bridge/synopsys: dw-hdmi: Add an option to suppress loading CEC driver drm/sun4i: dw-hdmi: Bit bang CEC on some SoCs drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 2 +- drivers/gpu/drm/sun4i/Kconfig | 10 +++ drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h | 11 +++ drivers/gpu/drm/sun4i/sun8i_hdmi_phy.c | 83 ++++++++++++++++++++++- include/drm/bridge/dw_hdmi.h | 2 + 5 files changed, 105 insertions(+), 3 deletions(-) -- 2.21.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel