From patchwork Thu Sep 17 04:57:35 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Petr Cvek X-Patchwork-Id: 7202191 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id F3645BEEC1 for ; Thu, 17 Sep 2015 04:59:39 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 3DFEA20809 for ; Thu, 17 Sep 2015 04:59:39 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5FDFC207EF for ; Thu, 17 Sep 2015 04:59:38 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZcRGs-0003Vn-1r; Thu, 17 Sep 2015 04:58:10 +0000 Received: from bubo.tul.cz ([2001:718:1c01:16::aa]) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZcRGn-0002rs-S0 for linux-arm-kernel@lists.infradead.org; Thu, 17 Sep 2015 04:58:06 +0000 Received: from [78.80.185.17] (78-80-185-17.tmcz.cz [78.80.185.17]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) by bubo.tul.cz (Postfix) with ESMTPSA id 2162D1F0007; Thu, 17 Sep 2015 06:57:19 +0200 (CEST) From: Petr Cvek Subject: [PATCH v3 09/26] ARM: pxa: magician: Optimize powerup delays for Samsung LCD To: robert.jarzmik@free.fr, philipp.zabel@gmail.com, daniel@zonque.org, haojian.zhuang@gmail.com, cooloney@gmail.com, rpurdie@rpsys.net, j.anaszewski@samsung.com, linux@arm.linux.org.uk, sre@kernel.org, dbaryshkov@gmail.com, lee.jones@linaro.org, sameo@linux.intel.com, dwmw2@infradead.org, arnd@arndb.de, g.liakhovetski@gmx.de References: Message-ID: <55FA483F.1040202@tul.cz> Date: Thu, 17 Sep 2015 06:57:35 +0200 User-Agent: Mozilla/5.0 (X11; Linux i686; rv:38.0) Gecko/20100101 Thunderbird/38.2.0 MIME-Version: 1.0 In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150916_215806_298381_CB530F77 X-CRM114-Status: UNSURE ( 8.88 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -2.6 (--) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arm-kernel@lists.infradead.org, linux-leds@vger.kernel.org, linux-pm@vger.kernel.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Delays for the Samsung LCD are greater than needed. These values were extracted from a datasheet. Signed-off-by: Petr Cvek --- arch/arm/mach-pxa/magician.c | 14 ++++++-------- 1 file changed, 6 insertions(+), 8 deletions(-) diff --git a/arch/arm/mach-pxa/magician.c b/arch/arm/mach-pxa/magician.c index d78fc3a..14d1f55 100644 --- a/arch/arm/mach-pxa/magician.c +++ b/arch/arm/mach-pxa/magician.c @@ -366,21 +366,19 @@ static void samsung_lcd_power(int on, struct fb_var_screeninfo *si) gpio_set_value(GPIO75_MAGICIAN_SAMSUNG_POWER, 1); else gpio_set_value(EGPIO_MAGICIAN_LCD_POWER, 1); - mdelay(10); + mdelay(6); gpio_set_value(GPIO106_MAGICIAN_LCD_DCDC_NRESET, 1); - mdelay(10); + mdelay(6); /* Avdd -> Voff >5ms */ gpio_set_value(GPIO104_MAGICIAN_LCD_VOFF_EN, 1); - mdelay(30); + mdelay(16); /* Voff -> Von >(5+10)ms */ gpio_set_value(GPIO105_MAGICIAN_LCD_VON_EN, 1); - mdelay(10); } else { - mdelay(10); gpio_set_value(GPIO105_MAGICIAN_LCD_VON_EN, 0); - mdelay(30); + mdelay(16); gpio_set_value(GPIO104_MAGICIAN_LCD_VOFF_EN, 0); - mdelay(10); + mdelay(6); gpio_set_value(GPIO106_MAGICIAN_LCD_DCDC_NRESET, 0); - mdelay(10); + mdelay(6); if (system_rev < 3) gpio_set_value(GPIO75_MAGICIAN_SAMSUNG_POWER, 0); else