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=-8.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,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 CF5FDC43382 for ; Thu, 27 Sep 2018 11:50:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 611A72150D for ; Thu, 27 Sep 2018 11:50:14 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=amarulasolutions.com header.i=@amarulasolutions.com header.b="UrQt3Oh+" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 611A72150D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=amarulasolutions.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727675AbeI0SII (ORCPT ); Thu, 27 Sep 2018 14:08:08 -0400 Received: from mail-pf1-f194.google.com ([209.85.210.194]:38630 "EHLO mail-pf1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727145AbeI0SIH (ORCPT ); Thu, 27 Sep 2018 14:08:07 -0400 Received: by mail-pf1-f194.google.com with SMTP id x17-v6so1744958pfh.5 for ; Thu, 27 Sep 2018 04:50:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amarulasolutions.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=V0R68Y/KzwdIumM6zfyEnPevd749hoDtm4cNpSj8lHM=; b=UrQt3Oh+h3lHXl9yq+YbsI4BIj37f6E/418FWFbw2leiym7BkzqO0wDW7L66LC8hQH dMw3mR4yfjL0UttZBbUvKBghOkokwFcBlP/r9iRVIVqgQOD+sU9RiBOJc0oZH2Foweny Tf7Ckqitg+pcY9xhvI1zuRPmP4SQxg3XEpeu4= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=V0R68Y/KzwdIumM6zfyEnPevd749hoDtm4cNpSj8lHM=; b=fdPK5ecqdCzag1l+qTxOomiTBAp/Kd3p1pWdSnUDDt2OobT5YT9mMeefEFOwAL3F59 Wa8/V2td79k54KSznV6/7rPhAFm+WVcMHTkep9JgZso2aNZabwRbb7Z0Ntxpg/co4mFS JYw5saKOocT4T9FQC7A2rL2lxApOlCNNhO9DE1PzNdg/twZdjmDJ+/ioC643DXP/rOPD PPkQEH/k2Opm1RNGuw00iFwE4ONg2oEZyV6ZGXIuORpRZdHbFCT1CCXJbJkjWdLq6c3M kd1v3SVC30vy+NbV+1rM9shQIl6shWS5POsHSDXvjO/Fyr2omf/dPImyrDMK9LVaLzYB YzPw== X-Gm-Message-State: ABuFfojDPiEKPesVr4jclrteKb6njjZD5J/ChePfmI4PqBpdNohwEdqA 5MhcmeMdloOrlCcE6SJ21flw8A== X-Google-Smtp-Source: ACcGV62iZgr6a1wPuCr8fIWrr0mf1eoTyBfPRoHo5BLUU2Swc38AUSdthHx5XNtUnk+Nngsr4XPO7g== X-Received: by 2002:a62:8145:: with SMTP id t66-v6mr10902156pfd.192.1538049011667; Thu, 27 Sep 2018 04:50:11 -0700 (PDT) Received: from localhost.localdomain ([183.82.230.83]) by smtp.gmail.com with ESMTPSA id v36-v6sm3744872pgn.85.2018.09.27.04.50.04 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 27 Sep 2018 04:50:10 -0700 (PDT) From: Jagan Teki To: Maxime Ripard , Chen-Yu Tsai , Icenowy Zheng , Jernej Skrabec , Vasily Khoruzhick , Rob Herring , Mark Rutland , Catalin Marinas , Will Deacon , David Airlie , dri-devel@lists.freedesktop.org, Michael Turquette , Stephen Boyd , linux-clk@vger.kernel.org, Michael Trimarchi , linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-sunxi@googlegroups.com Cc: Jagan Teki Subject: [PATCH 08/12] drm/sun4i: sun6i_mipi_dsi: Refactor vertical video start delay Date: Thu, 27 Sep 2018 17:18:46 +0530 Message-Id: <20180927114850.24565-9-jagan@amarulasolutions.com> X-Mailer: git-send-email 2.18.0.321.gffc6fa0e3 In-Reply-To: <20180927114850.24565-1-jagan@amarulasolutions.com> References: <20180927114850.24565-1-jagan@amarulasolutions.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Accordingly to BPI-M64-bsp DE DSI code Video start delay can be computed by subtracting total vertical timing with front porch timing and with adding 1 delay line for TCON. This patch simply add the start_delay logic from BPI-M64-bsp, w/o this new computation, the DSI on A64 encounter vblank time out. [CRTC:36:crtc-0] vblank wait timed out Signed-off-by: Jagan Teki --- drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c index 9918fdb990ff..217db74c6dc3 100644 --- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c +++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c @@ -358,7 +358,17 @@ static void sun6i_dsi_inst_init(struct sun6i_dsi *dsi, static u16 sun6i_dsi_get_video_start_delay(struct sun6i_dsi *dsi, struct drm_display_mode *mode) { - return mode->vtotal - (mode->vsync_end - mode->vdisplay) + 1; + u32 vfp = mode->vsync_start - mode->vdisplay; + u32 start_delay; + + start_delay = mode->vtotal - vfp + 1; + if (start_delay > mode->vtotal) + start_delay -= mode->vtotal; + + if (!start_delay) + start_delay = 1; + + return start_delay; } static void sun6i_dsi_setup_burst(struct sun6i_dsi *dsi, -- 2.18.0.321.gffc6fa0e3