From patchwork Fri Nov 23 09:25:10 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paul Kocialkowski X-Patchwork-Id: 10695479 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id AFF8A5A4 for ; Fri, 23 Nov 2018 09:46:04 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9DF752C324 for ; Fri, 23 Nov 2018 09:46:04 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 91CC72C3BB; Fri, 23 Nov 2018 09:46:04 +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=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 4A9642C324 for ; Fri, 23 Nov 2018 09:46:04 +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:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version: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=1cG4MTLkKJqrnGzGZ4GaSJJohTBQxFSM5BOwkX6yrak=; b=BFGdPawr8FyUv9 D8suBDyWHPW5ouQyKZ69jhJsFIg1K4WzexKvXFVWmSGW0IyCstnvEgIm/GXu378V9YAP96AiwPeDM 2IAXDznPu1xPEP5aDS6pYLFTJzgpV1EEEGY8+jTSPCJ44hU4sLhOu0VDgMJKRLsqQORVk2eczo9o6 TCV2pnZ9AIX9CaLDIZmPsCByRBoPXihgzcHMvhZfawTE2NkHfax3jd0qcJPqzkQcRMCHBB7Rng3jl tjWCsyL7gYlZNfXRreJCef91kEgLuSlNSanPCOyB1BI0tLsRbCMBSz1hz2B2p3Ttsrig/Z33c0E0X DjlrQNl8sAOe7wDq/bsg==; 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 1gQ82E-0002cL-LK; Fri, 23 Nov 2018 09:46:02 +0000 Received: from mail.bootlin.com ([62.4.15.54]) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gQ7k6-0001q2-DY for linux-arm-kernel@lists.infradead.org; Fri, 23 Nov 2018 09:27:23 +0000 Received: by mail.bootlin.com (Postfix, from userid 110) id 29ADF20F4A; Fri, 23 Nov 2018 10:27:08 +0100 (CET) Received: from localhost.localdomain (aaubervilliers-681-1-94-205.w90-88.abo.wanadoo.fr [90.88.35.205]) by mail.bootlin.com (Postfix) with ESMTPSA id 7CF3920F6A; Fri, 23 Nov 2018 10:26:37 +0100 (CET) From: Paul Kocialkowski To: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 38/43] drm/sun4i: Move access control before setting the register as documented Date: Fri, 23 Nov 2018 10:25:10 +0100 Message-Id: <20181123092515.2511-39-paul.kocialkowski@bootlin.com> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181123092515.2511-1-paul.kocialkowski@bootlin.com> References: <20181123092515.2511-1-paul.kocialkowski@bootlin.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20181123_012718_701200_7FA956E6 X-CRM114-Status: GOOD ( 12.09 ) 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: Daniel Vetter , Maxime Ripard , Maarten Lankhorst , linux-sunxi@googlegroups.com, David Airlie , Chen-Yu Tsai , Thomas Petazzoni , Sean Paul 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 From: Maxime Ripard Unlike what is currently being done, the ACCESS_CTRL bit documentation asks that this bit should be set before modifying any register. The code in the BSP also does this, so make sure we do this as well. Signed-off-by: Maxime Ripard --- drivers/gpu/drm/sun4i/sun4i_frontend.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/sun4i/sun4i_frontend.c b/drivers/gpu/drm/sun4i/sun4i_frontend.c index b9c18fa2fff3..2c9dcb4ffde0 100644 --- a/drivers/gpu/drm/sun4i/sun4i_frontend.c +++ b/drivers/gpu/drm/sun4i/sun4i_frontend.c @@ -74,6 +74,10 @@ static void sun4i_frontend_scaler_init(struct sun4i_frontend *frontend) { int i; + regmap_write_bits(frontend->regs, SUN4I_FRONTEND_FRM_CTRL_REG, + SUN4I_FRONTEND_FRM_CTRL_COEF_ACCESS_CTRL, + SUN4I_FRONTEND_FRM_CTRL_COEF_ACCESS_CTRL); + for (i = 0; i < 32; i++) { regmap_write(frontend->regs, SUN4I_FRONTEND_CH0_HORZCOEF0_REG(i), sun4i_frontend_horz_coef[2 * i]); @@ -89,9 +93,6 @@ static void sun4i_frontend_scaler_init(struct sun4i_frontend *frontend) sun4i_frontend_vert_coef[i]); } - regmap_update_bits(frontend->regs, SUN4I_FRONTEND_FRM_CTRL_REG, - SUN4I_FRONTEND_FRM_CTRL_COEF_ACCESS_CTRL, - SUN4I_FRONTEND_FRM_CTRL_COEF_ACCESS_CTRL); } int sun4i_frontend_init(struct sun4i_frontend *frontend)