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=-9.1 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,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 86B72C43441 for ; Fri, 16 Nov 2018 16:39:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4F1672086B for ; Fri, 16 Nov 2018 16:39:56 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=amarulasolutions.com header.i=@amarulasolutions.com header.b="EyK+bgba" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4F1672086B 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 S2390101AbeKQCwv (ORCPT ); Fri, 16 Nov 2018 21:52:51 -0500 Received: from mail-pf1-f193.google.com ([209.85.210.193]:43786 "EHLO mail-pf1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390014AbeKQCwv (ORCPT ); Fri, 16 Nov 2018 21:52:51 -0500 Received: by mail-pf1-f193.google.com with SMTP id w73so2324836pfk.10 for ; Fri, 16 Nov 2018 08:39:45 -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=BNh71MWK36UL5AiiDZH8rXZrXUHyz8v782txUp4gWBo=; b=EyK+bgba2nKC1fjjlPMoGoh3rWCCaVlfNzniff3qtyDy/F5fcG5UNiGhSt+KquITP5 HrLzPxe/dblMmZJEx/tXfffWYYwcUyVTkxU+2oP3XISss7EOPXhPy8K8Q7P+QkGNwWQg IU57wwgUMVoXDoTptSs7Jan+2pCze5RLWI/og= 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=BNh71MWK36UL5AiiDZH8rXZrXUHyz8v782txUp4gWBo=; b=QMSte97bBG3FfOMKX5C2ETcWvdQrLlZT5hkgI1/ETGgqAFbmLsXF3jbEDTwO9rvlSv dsKtu1oKLAXthxqQ3pSLFO/c79skbMaOTbhtwiarB3jO0oExPVSws4tcB+lnqEeA2XUU Rb8jMp9TQaUlw7Mj3hLcg4mqaEBPkfoi9G066J03t39CWfhHJp0Wa925kZaTEKgoguPw urL3fX0jSQWNOeKegel0wDL2YNJSKGaB2wgrt95apShTCjUDwGLOwdES0UMTR1DBf2Xp YgjZnOl65eZR5cEIdOX9AG8rvf45LBpTPVPiYWCA//oxj2fcB+X7WTIIBOSnaeZUXOz3 8Tew== X-Gm-Message-State: AGRZ1gIjHHG6dSX5MTM5c6nGQPZCKZz+IEnCcEwAiGJG0oj9Lq7hr/KJ x/Fth7X+HjbCuBN4VYb06z/ALg== X-Google-Smtp-Source: AJdET5eXHxZ4xM+LvjmyLiNlmboyuD3m+i7gdVcgcnEP2CoFH0019SgoW2JEETJUfUgvunQKG/QeIA== X-Received: by 2002:a62:2292:: with SMTP id p18mr8881397pfj.9.1542386385490; Fri, 16 Nov 2018 08:39:45 -0800 (PST) Received: from localhost.localdomain ([115.97.190.86]) by smtp.gmail.com with ESMTPSA id p5-v6sm34622213pfb.109.2018.11.16.08.39.38 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 16 Nov 2018 08:39:44 -0800 (PST) From: Jagan Teki To: Maarten Lankhorst , Maxime Ripard , Sean Paul , David Airlie , Rob Herring , Chen-Yu Tsai , Icenowy Zheng , Jernej Skrabec , Vasily Khoruzhick , Thierry Reding , Mark Rutland , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Michael Trimarchi , TL Lim , linux-sunxi@googlegroups.com, linux-amarula@amarulasolutions.com Cc: Jagan Teki Subject: [PATCH v2 01/12] drm/sun4i: sun6i_mipi_dsi: Compute burst mode loop N1 instruction delay Date: Fri, 16 Nov 2018 22:09:05 +0530 Message-Id: <20181116163916.29621-2-jagan@amarulasolutions.com> X-Mailer: git-send-email 2.18.0.321.gffc6fa0e3 In-Reply-To: <20181116163916.29621-1-jagan@amarulasolutions.com> References: <20181116163916.29621-1-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 Loop N1 instruction delay for burst mode lcd panel are computed as per BSP code. Reference code is available in BSP (from linux-sunxi drivers/video/sunxi/disp2/disp/de/lowlevel_sun50iw1/de_dsi.c) dsi_dev[sel]->dsi_inst_loop_num.bits.loop_n1= (panel->lcd_ht-panel->lcd_x)*(150)/(panel->lcd_dclk_freq*8) - 50; => (((mode->htotal - mode->hdisplay) * 150) / ((mode->clock / 1000) * 8)) - 50; So use the similar computation for loop N1 delay. Signed-off-by: Jagan Teki --- drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c index def145086a5c..43ab7127d428 100644 --- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c +++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c @@ -379,6 +379,24 @@ static u16 sun6i_dsi_get_timings_vblk(struct sun6i_dsi *dsi, return vblk; } +static u16 sun6i_dsi_setup_inst_delay(struct sun6i_dsi *dsi, + struct drm_display_mode *mode) +{ + struct mipi_dsi_device *device = dsi->device; + u32 hsync_porch, dclk; + u16 delay; + + hsync_porch = (mode->htotal - mode->hdisplay); + dclk = (mode->clock / 1000); + + if (device->mode_flags & MIPI_DSI_MODE_VIDEO_BURST) + delay = ((hsync_porch * 150) / (dclk * 8)) - 50; + else + delay = 50 - 1; + + return delay; +} + static u16 sun6i_dsi_get_video_start_delay(struct sun6i_dsi *dsi, struct drm_display_mode *mode) { @@ -418,7 +436,7 @@ static void sun6i_dsi_setup_burst(struct sun6i_dsi *dsi, static void sun6i_dsi_setup_inst_loop(struct sun6i_dsi *dsi, struct drm_display_mode *mode) { - u16 delay = 50 - 1; + u16 delay = sun6i_dsi_setup_inst_delay(dsi, mode); regmap_write(dsi->regs, SUN6I_DSI_INST_LOOP_NUM_REG(0), SUN6I_DSI_INST_LOOP_NUM_N0(50 - 1) | -- 2.18.0.321.gffc6fa0e3