From patchwork Tue Dec 5 15:10:19 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Ripard X-Patchwork-Id: 120676 Delivered-To: patch@linaro.org Received: by 10.140.22.227 with SMTP id 90csp5864994qgn; Tue, 5 Dec 2017 07:11:21 -0800 (PST) X-Google-Smtp-Source: AGs4zMZevn6o3TTOenj2FVP9qpj4qP+m4aB2SiV7LA7s0N/TVshv5xEVOrpVS6bjC8TJNS+6o5MK X-Received: by 10.159.207.138 with SMTP id z10mr18791404plo.259.1512486681498; Tue, 05 Dec 2017 07:11:21 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1512486681; cv=none; d=google.com; s=arc-20160816; b=epgtLHx2jJP1m2ceLCSF1HSD638wA9oExjC1tRQytrAeNkqyjT8rPQ9RFcABYWHn3l I738Pr7nHhaaLAUN6liUa6C3umfxTfXakfe/9AiGVJC5p5tRRWPGQ8Jf7a1VGXmjZ+kC 3lHEQK5lMFNQiWyf0wn7SrbcgWQDCXs6vtqzjND089JgKG7SWkC5g/VfEqjs10rD25rt oC2ckpdti3U4Wr9zr2wfq8Z/R3uhjfJIllijI4POa+RCufNNA7dlckKfFR4FTuQ6XuXz glArIg3hmkmMdFVj9MmztbC1Ex8WdrpJi6aYC2C3nUUGCapD1oVh0uYLjeGfmb9gJ6N3 tU9w== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=sender:errors-to:content-transfer-encoding:mime-version :list-subscribe:list-help:list-post:list-archive:list-unsubscribe :list-id:precedence:cc:references:in-reply-to:references:in-reply-to :message-id:date:subject:to:from:delivered-to :arc-authentication-results; bh=tkc3V9uuZFSHeVgYict9H2TCIk0JXykAG8dZMJYeZi8=; b=gubjdq9eOIItfdwE265+1YXYJcPgqTlrQigk1QdUAPDHTV/or3XisfXLYeNp7mM28M 8E3DMZ9leyw4mq7YzfUZBQYdciUkp4R/GPuC8HVwss9qrD0jHZVjFquQTzTUylfPySK7 mTi5gzrFHFMmndluxyS3DEaLF2gbcVoFCHvogGoU5h+M6S69GWXUBd8bZ0JAHvOLvsv0 sPG4aUDrGIQSaSm6irEQpNxGXyHlMclevVAD8C5tBgNoRjTX+Vhlb9vYYsEICDdoysnw MleaqEmEeQQBkTxhMRhIOWRDHQFxghJazc+t3x//JhovbojLLPwP0cTKfE63tguj2+xt jjFA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of dri-devel-bounces@lists.freedesktop.org designates 131.252.210.177 as permitted sender) smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Return-Path: Received: from gabe.freedesktop.org (gabe.freedesktop.org. [131.252.210.177]) by mx.google.com with ESMTPS id y14si225663pfi.164.2017.12.05.07.11.21 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 05 Dec 2017 07:11:21 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of dri-devel-bounces@lists.freedesktop.org designates 131.252.210.177 as permitted sender) client-ip=131.252.210.177; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of dri-devel-bounces@lists.freedesktop.org designates 131.252.210.177 as permitted sender) smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id F01AF6E58A; Tue, 5 Dec 2017 15:10:42 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail.free-electrons.com (mail.free-electrons.com [62.4.15.54]) by gabe.freedesktop.org (Postfix) with ESMTP id 74D276E58C for ; Tue, 5 Dec 2017 15:10:41 +0000 (UTC) Received: by mail.free-electrons.com (Postfix, from userid 110) id 40B8F2097F; Tue, 5 Dec 2017 16:10:40 +0100 (CET) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on mail.free-electrons.com X-Spam-Level: X-Spam-Status: No, score=-1.0 required=5.0 tests=ALL_TRUSTED,SHORTCIRCUIT, URIBL_BLOCKED shortcircuit=ham autolearn=disabled version=3.4.0 Received: from localhost (LStLambert-657-1-97-87.w90-63.abo.wanadoo.fr [90.63.216.87]) by mail.free-electrons.com (Postfix) with ESMTPSA id 0F2E1206F1; Tue, 5 Dec 2017 16:10:40 +0100 (CET) From: Maxime Ripard To: Daniel Vetter , David Airlie , Chen-Yu Tsai , Maxime Ripard Subject: [PATCH v3 07/15] drm/sun4i: Create minimal multipliers and dividers Date: Tue, 5 Dec 2017 16:10:19 +0100 Message-Id: <42424895bd242dceeeeacf3f83e1c24aa03fb60f.1512486553.git-series.maxime.ripard@free-electrons.com> X-Mailer: git-send-email 2.14.3 In-Reply-To: References: In-Reply-To: References: Cc: Mark Rutland , Thomas Petazzoni , jernej.skrabec@siol.net, plaes@plaes.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Rob Herring , linux-arm-kernel@lists.infradead.org, icenowy@aosc.io X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" The various outputs the TCON can provide have different constraints on the dotclock divider. Let's make them configurable by the various mode_set functions. Reviewed-by: Chen-Yu Tsai Signed-off-by: Maxime Ripard --- drivers/gpu/drm/sun4i/sun4i_dotclock.c | 10 +++++++--- drivers/gpu/drm/sun4i/sun4i_tcon.c | 2 ++ drivers/gpu/drm/sun4i/sun4i_tcon.h | 2 ++ 3 files changed, 11 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/sun4i/sun4i_dotclock.c b/drivers/gpu/drm/sun4i/sun4i_dotclock.c index d401156490f3..023f39bda633 100644 --- a/drivers/gpu/drm/sun4i/sun4i_dotclock.c +++ b/drivers/gpu/drm/sun4i/sun4i_dotclock.c @@ -17,8 +17,9 @@ #include "sun4i_dotclock.h" struct sun4i_dclk { - struct clk_hw hw; - struct regmap *regmap; + struct clk_hw hw; + struct regmap *regmap; + struct sun4i_tcon *tcon; }; static inline struct sun4i_dclk *hw_to_dclk(struct clk_hw *hw) @@ -73,11 +74,13 @@ static unsigned long sun4i_dclk_recalc_rate(struct clk_hw *hw, static long sun4i_dclk_round_rate(struct clk_hw *hw, unsigned long rate, unsigned long *parent_rate) { + struct sun4i_dclk *dclk = hw_to_dclk(hw); + struct sun4i_tcon *tcon = dclk->tcon; unsigned long best_parent = 0; u8 best_div = 1; int i; - for (i = 6; i <= 127; i++) { + for (i = tcon->dclk_min_div; i <= tcon->dclk_max_div; i++) { unsigned long ideal = rate * i; unsigned long rounded; @@ -167,6 +170,7 @@ int sun4i_dclk_create(struct device *dev, struct sun4i_tcon *tcon) dclk = devm_kzalloc(dev, sizeof(*dclk), GFP_KERNEL); if (!dclk) return -ENOMEM; + dclk->tcon = tcon; init.name = clk_name; init.ops = &sun4i_dclk_ops; diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c index ea056a3d2131..46e28ca1f676 100644 --- a/drivers/gpu/drm/sun4i/sun4i_tcon.c +++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c @@ -177,6 +177,8 @@ static void sun4i_tcon0_mode_set_rgb(struct sun4i_tcon *tcon, u8 clk_delay; u32 val = 0; + tcon->dclk_min_div = 6; + tcon->dclk_max_div = 127; sun4i_tcon0_mode_set_common(tcon, mode); /* Adjust clock delay */ diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.h b/drivers/gpu/drm/sun4i/sun4i_tcon.h index 839266a38505..bd3ad7684870 100644 --- a/drivers/gpu/drm/sun4i/sun4i_tcon.h +++ b/drivers/gpu/drm/sun4i/sun4i_tcon.h @@ -169,6 +169,8 @@ struct sun4i_tcon { /* Pixel clock */ struct clk *dclk; + u8 dclk_max_div; + u8 dclk_min_div; /* Reset control */ struct reset_control *lcd_rst;