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=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=unavailable 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 21B6CC5CFFE for ; Mon, 10 Dec 2018 16:19:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D967A20672 for ; Mon, 10 Dec 2018 16:19:00 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=amarulasolutions.com header.i=@amarulasolutions.com header.b="lvquzrG0" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D967A20672 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 S1728744AbeLJQTA (ORCPT ); Mon, 10 Dec 2018 11:19:00 -0500 Received: from mail-wr1-f68.google.com ([209.85.221.68]:44347 "EHLO mail-wr1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728560AbeLJQR6 (ORCPT ); Mon, 10 Dec 2018 11:17:58 -0500 Received: by mail-wr1-f68.google.com with SMTP id z5so11056526wrt.11 for ; Mon, 10 Dec 2018 08:17:57 -0800 (PST) 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=TxNgORGPoSCn3Oq9HEn9GoMFiwahxDYqmWRf1K3P8O8=; b=lvquzrG04DT0Y6bsbtOA+ZLoIGEvklE7XkuYHVBq0nhUBrl4xHRjAy8d0aNGFU11ux klqCRmNcoo8g0irOhc48Z5qjccbNYyTYTskDA+JQVBI+9QZNSbDjKPspgWEGimdGDFy2 slUsatULEvlKJQKiznvGc7Vbpq4fseqW3Fup4= 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=TxNgORGPoSCn3Oq9HEn9GoMFiwahxDYqmWRf1K3P8O8=; b=URmklK/KoV57RpPeMh5mcBZqvdKv46p+AfujG1b9G4KjyhBbFd7jS47/ewgITBJceE f1609xOEViEgclKaHFj2a03UU8ZYS3A1Kp7ZSBVRheSB+YWHp/QpG+IVDVvUnIVxp7BX Qt5kJYQCCNkX9HbJEBy3vU3/cc5iBGnO6xXN6TdOnR1vRptF7EORJeFqf9VMiH/1HAnc /8TZI8r081evNp6Q615xYEgzHqoJfQn/mRv/vXRWDqNINUt2Vhy5ZdFxEFARhbRa59I6 jR/7gfDAVB9NZWtmbhouqWQ7lTf1qiS2soHv6s6pmNr01/8V3ymxJQ7FFqJp23WtN+0K elnA== X-Gm-Message-State: AA+aEWY4UwX7/Qxz9ro/nyf6Y+eY57XaQt039YkRppznQjq+RSjVGIg/ 2t/XcRwiZ7N0u3T8a1U6gjWCeQ== X-Google-Smtp-Source: AFSGD/WKoXN5Q1BGK+/QFKiIqyuJtSy532LcvwxbVFqOOwq141q0U/0oZ2d0GXXsJfPAZD8eAJY75Q== X-Received: by 2002:a5d:4c8a:: with SMTP id z10mr10124004wrs.75.1544458676335; Mon, 10 Dec 2018 08:17:56 -0800 (PST) Received: from localhost.localdomain (ip-162-59.sn-213-198.clouditalia.com. [213.198.162.59]) by smtp.gmail.com with ESMTPSA id b13sm8397503wrn.28.2018.12.10.08.17.54 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 10 Dec 2018 08:17:55 -0800 (PST) From: Jagan Teki To: Maxime Ripard , Chen-Yu Tsai , Michael Turquette , Stephen Boyd Cc: linux-arm-kernel@lists.infradead.org, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Michael Trimarchi , linux-sunxi , linux-amarula@amarulasolutions.com, Jagan Teki Subject: [PATCH v5 07/17] drm/sun4i: sun6i_mipi_dsi: Refactor vertical video start delay Date: Mon, 10 Dec 2018 21:47:19 +0530 Message-Id: <20181210161729.29720-8-jagan@amarulasolutions.com> X-Mailer: git-send-email 2.18.0.321.gffc6fa0e3 In-Reply-To: <20181210161729.29720-1-jagan@amarulasolutions.com> References: <20181210161729.29720-1-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 Video start delay can be computed by subtracting total vertical timing with front porch timing and with adding 1 delay line for TCON. BSP code form BPI-M64-bsp is computing video start delay as (from linux-sunxi/ drivers/video/sunxi/disp2/disp/de/lowlevel_sun50iw1/de_dsi.c) u32 vfp = panel->lcd_vt - panel->lcd_y - panel->lcd_vbp; => (panel->lcd_vt) - panel->lcd_y - (panel->lcd_vbp) => (timmings->ver_front_porch + panel->lcd_vbp + panel->lcd_y) - panel->lcd_y - (panel->lcd_vbp) => timmings->ver_front_porch + panel->lcd_vbp + panel->lcd_y - panel->lcd_y - panel->lcd_vbp => timmings->ver_front_porch So, update the start delay computation accordingly. 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 c9b0222ebcd4..cb41fea4f3ee 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