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=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 19E16C43381 for ; Sun, 24 Mar 2019 21:22:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E20C120811 for ; Sun, 24 Mar 2019 21:22:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728978AbfCXVWB (ORCPT ); Sun, 24 Mar 2019 17:22:01 -0400 Received: from mailoutvs37.siol.net ([185.57.226.228]:50907 "EHLO mail.siol.net" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726743AbfCXVWB (ORCPT ); Sun, 24 Mar 2019 17:22:01 -0400 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 Cc: a.hajda@samsung.com, Laurent.pinchart@ideasonboard.com, airlied@linux.ie, daniel@ffwll.ch, wens@csie.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org 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 Content-Transfer-Encoding: quoted-printable Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.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(-) --=20 2.21.0