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 4A2D0C282CE for ; Mon, 11 Feb 2019 14:43:40 +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 13E2C20700 for ; Mon, 11 Feb 2019 14:43:40 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="NL+tb4LE" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 13E2C20700 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=Q0dv3s4htZxtvXJPYmRtXyMyHN6O/sSS0hXoQ+tAUiE=; b=NL+tb4LEmd46V1 GimHHAZ98c5ZoJCs8Y9WIE5L/1mKZUzY2df8/d+2RaBcPGeOHfCDYdSF/hbqJFXJMT1PaNuE3M7WX BUEardUWjNPMPt4sCE5SA63qZrStHvjMnpoAWhWIPHhq8Gf3X2pwvbEE/EJS2rW2khvat0BpKOlrK ql3c3t6CbPcg4QuGAToIQaqjIFP/eBSSv8mfNV4Iz0/ENnCWXjAxeTE4CAHPFoU6EzqqIyoMw6PW/ XEor5nPWbAbw7NfLyCiG2v7me1TLImB0rSo+V0mThcbYj+r750BZzSh9dEr8NIEsmqFLWx0CXjpW2 ppyl57wgrVswfsJYpRKw==; 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 1gtCo1-0006a7-3K; Mon, 11 Feb 2019 14:43:33 +0000 Received: from relay8-d.mail.gandi.net ([217.70.183.201]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gtCmN-0004ys-O4 for linux-arm-kernel@lists.infradead.org; Mon, 11 Feb 2019 14:42:04 +0000 X-Originating-IP: 185.94.189.187 Received: from localhost (unknown [185.94.189.187]) (Authenticated sender: maxime.ripard@bootlin.com) by relay8-d.mail.gandi.net (Postfix) with ESMTPSA id B68A81BF204; Mon, 11 Feb 2019 14:41:38 +0000 (UTC) From: Maxime Ripard To: Maarten Lankhorst , Sean Paul , Maxime Ripard Subject: [PATCH v3 3/8] drm/sun4i: dsi: Enforce boundaries on the start delay Date: Mon, 11 Feb 2019 15:41:24 +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-20190211_064153_280532_C39D3D8E X-CRM114-Status: GOOD ( 12.73 ) 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 The Allwinner BSP makes sure that we don't end up with a null start delay or with a delay larger than vtotal. The former condition is likely to happen now with the reworked start delay, so make sure we enforce the same boundaries. Signed-off-by: Maxime Ripard --- drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c index 9471fa695ec7..506f2e8cf454 100644 --- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c +++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c @@ -358,8 +358,12 @@ static u16 sun6i_dsi_get_video_start_delay(struct sun6i_dsi *dsi, struct drm_display_mode *mode) { u16 start = clamp(mode->vtotal - mode->vdisplay - 10, 8, 100); + u16 delay = mode->vtotal - (mode->vsync_end - mode->vdisplay) + start; - return mode->vtotal - (mode->vsync_end - mode->vdisplay) + start; + if (delay > mode->vtotal) + delay = delay % mode->vtotal; + + return max_t(u16, delay, 1); } static void sun6i_dsi_setup_burst(struct sun6i_dsi *dsi, -- 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