From patchwork Wed Sep 20 20:01:19 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?q?Jernej_=C5=A0krabec?= X-Patchwork-Id: 9962277 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 6E3F360208 for ; Wed, 20 Sep 2017 20:02:52 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 61D391FF40 for ; Wed, 20 Sep 2017 20:02:52 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 566E82847B; Wed, 20 Sep 2017 20:02:52 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 0608C1FF40 for ; Wed, 20 Sep 2017 20:02:52 +0000 (UTC) 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:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To: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:List-Owner; bh=ho3ELlNp+IpqDGvosW9IgCT0Fy6NKF7PtEk7X35fHXw=; b=GNT4WJeeRnPwdmm/6eqtPDzDq/ we1s6qD85TWJ/qRW8UgtIlKCtvhbx/1xa4uHH7aEB5tprFTCK4AnRQxC9k705QT+o0QHB15hX6r6B me5/IDHvkGEmZpsxDcFo7JCiJqczOrGElughZSokl2Cx91CDctUICrdiSLrC8mamsfhjTPTqsCvK/ wkvMiyx+L3lHQdQLJNsU3aZ1/th/WYbc7kaUdPIgEg4akh4sZpMTPPshjVeofoGwEXH3Q/ogb/Ijm k3fRdBAXKxKPGi5vx6vjJgmg+V3Y7ZiI90cCDLl3NG6G1qFWhxPCA0X6clONvVdN6lNHbyeTnJHQW bEVTySkw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1dulCo-00016Z-PV; Wed, 20 Sep 2017 20:02:46 +0000 Received: from mailoutvs1.siol.net ([213.250.19.134] helo=mail.siol.net) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1dulC3-0000Vd-A5 for linux-arm-kernel@lists.infradead.org; Wed, 20 Sep 2017 20:02:02 +0000 Received: from localhost (localhost [127.0.0.1]) by mail.siol.net (Postfix) with ESMTP id 65287527D6E; Wed, 20 Sep 2017 22:01:39 +0200 (CEST) X-Virus-Scanned: amavisd-new at psrvmta09.zcs-production.pri Received: from mail.siol.net ([127.0.0.1]) by localhost (psrvmta09.zcs-production.pri [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id Lp7xU9ZClA3m; Wed, 20 Sep 2017 22:01:38 +0200 (CEST) Received: from mail.siol.net (localhost [127.0.0.1]) by mail.siol.net (Postfix) with ESMTPS id DDD53527D6C; Wed, 20 Sep 2017 22:01:38 +0200 (CEST) Received: from localhost.localdomain (cpe-86-58-68-135.ftth.triera.net [86.58.68.135]) (Authenticated sender: 031275009) by mail.siol.net (Postfix) with ESMTPSA id 86858527D68; Wed, 20 Sep 2017 22:01:36 +0200 (CEST) From: Jernej Skrabec To: maxime.ripard@free-electrons.com, wens@csie.org Subject: [RESEND RFC PATCH 2/7] drm: bridge: Enable workaround in dw_hdmi for v1.32a Date: Wed, 20 Sep 2017 22:01:19 +0200 Message-Id: <20170920200124.20457-3-jernej.skrabec@siol.net> X-Mailer: git-send-email 2.14.1 In-Reply-To: <20170920200124.20457-1-jernej.skrabec@siol.net> References: <20170920200124.20457-1-jernej.skrabec@siol.net> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170920_130159_724662_981C82B4 X-CRM114-Status: GOOD ( 10.01 ) 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: devicetree@vger.kernel.org, narmstrong@baylibre.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-sunxi@googlegroups.com, hans.verkuil@cisco.com, Laurent.pinchart@ideasonboard.com, linux-media@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org, icenowy@aosc.io MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Allwinner SoCs have dw hdmi controller v1.32a which exhibits same magenta line issue as i.MX6Q and i.MX6DL. Enable workaround for it. Allwinner never released any kind of dw hdmi or errata documentation, so it is not clear how many iterations need to be executed. One iteration seems to be enough. Signed-off-by: Jernej Skrabec --- drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c index 09cb5a3e4c71..72969240a9d4 100644 --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c @@ -1631,9 +1631,10 @@ static void dw_hdmi_clear_overflow(struct dw_hdmi *hdmi) * then write one of the FC registers several times. * * The number of iterations matters and depends on the HDMI TX revision - * (and possibly on the platform). So far only i.MX6Q (v1.30a) and - * i.MX6DL (v1.31a) have been identified as needing the workaround, with - * 4 and 1 iterations respectively. + * (and possibly on the platform). So far i.MX6Q (v1.30a), i.MX6DL + * (v1.31a) and multiple Allwinner SoCs (v1.32a) have been identified + * as needing the workaround, with 4 iterations for v1.30a and 1 + * iteration for others. */ switch (hdmi->version) { @@ -1641,6 +1642,7 @@ static void dw_hdmi_clear_overflow(struct dw_hdmi *hdmi) count = 4; break; case 0x131a: + case 0x132a: count = 1; break; default: