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=-9.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,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 16C72C169C4 for ; Fri, 8 Feb 2019 09:54:50 +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 D68C921916 for ; Fri, 8 Feb 2019 09:54:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="mhGYPTpH" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D68C921916 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=bootlin.com 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: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=4fc0gmuxe8bkQZG+C0a4CKUFVisP4KRH+D1usN3C4ok=; b=mhGYPTpHngXOVA Z7h8Rv2g4ndsrSp+mY1MS6XA3EeCFWCJ5bOZr8zmJbSff04W0sQgL2MV0dXvT8/e1R4WSTJ1qjKul 3NtHuX2xS9dRZFPrC+4vXq9Li+JHFNy/6Og8tQCSEqe70yT4IHXfPNUg5Cq5/N26uWsWpTk1ftu1K 6cr3m0YuP0YS9lLqPzqa5BkxAJw+GR88ojL6uNaRCMZPnfIL5lZr1k8IdfCTR0Zryr9mZ6B8Na9ZB HFkbcHnAgtlpOjxTopnhvnFhroGy7ld5wWclFSOl0frqF+mmNlskW0/VEHOPKoiawX1aRxbkaqG2M C6yYvdBLVdc7rPv3Xn/A==; 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 1gs2rv-0004ZT-RS; Fri, 08 Feb 2019 09:54:47 +0000 Received: from relay12.mail.gandi.net ([217.70.178.232]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gs2qx-0003UT-6p for linux-arm-kernel@lists.infradead.org; Fri, 08 Feb 2019 09:53:53 +0000 Received: from localhost (aaubervilliers-681-1-80-177.w90-88.abo.wanadoo.fr [90.88.22.177]) (Authenticated sender: maxime.ripard@bootlin.com) by relay12.mail.gandi.net (Postfix) with ESMTPSA id 4163A200008; Fri, 8 Feb 2019 09:53:44 +0000 (UTC) From: Maxime Ripard To: Maarten Lankhorst , Sean Paul , Maxime Ripard Subject: [PATCH v2 7/9] drm/sun4i: dsi: Rework a bit the hblk calculation Date: Fri, 8 Feb 2019 10:53:20 +0100 Message-Id: X-Mailer: git-send-email 2.20.1 In-Reply-To: References: MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190208_015348_074673_9C2A28BC X-CRM114-Status: GOOD ( 12.83 ) 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: bbrezillon@kernel.org, dri-devel@lists.freedesktop.org, Paul Kocialkowski , Chen-Yu Tsai , Thomas Petazzoni , Jagan Teki , 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 the hblk calculation actually follows a similar pattern than the other packets. Rework a bit the calculation and add a comment. Signed-off-by: Maxime Ripard --- drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c index 8e6392831e9d..e0288e7dc64e 100644 --- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c +++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c @@ -488,9 +488,13 @@ static void sun6i_dsi_setup_timings(struct sun6i_dsi *dsi, (mode->hsync_start - mode->hdisplay) * Bpp - HFP_PACKET_OVERHEAD); /* - * hblk seems to be the line + porches length. + * The blanking is set using a sync event (4 bytes) and a + * blanking packet (4 bytes + payload + 2 bytes). Its minimal + * size is therefore 10 bytes. */ - hblk = mode->htotal * Bpp - hsa; +#define HBLK_PACKET_OVERHEAD 10 + hblk = max((unsigned int)HBLK_PACKET_OVERHEAD, + (mode->htotal - (mode->hsync_end - mode->hsync_start)) * Bpp - HBLK_PACKET_OVERHEAD); /* * And I'm not entirely sure what vblk is about. The driver in -- git-series 0.9.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel