From patchwork Wed Mar 30 20:04:06 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Boris BREZILLON X-Patchwork-Id: 8702911 Return-Path: X-Original-To: patchwork-linux-samsung-soc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 1AE349F44D for ; Wed, 30 Mar 2016 20:07:31 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 0A07720389 for ; Wed, 30 Mar 2016 20:07:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 215FB20361 for ; Wed, 30 Mar 2016 20:07:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932407AbcC3UH0 (ORCPT ); Wed, 30 Mar 2016 16:07:26 -0400 Received: from down.free-electrons.com ([37.187.137.238]:45951 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1755822AbcC3UGL (ORCPT ); Wed, 30 Mar 2016 16:06:11 -0400 Received: by mail.free-electrons.com (Postfix, from userid 110) id 0F642184C; Wed, 30 Mar 2016 22:06:08 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from localhost.localdomain (LFbn-1-2159-240.w90-76.abo.wanadoo.fr [90.76.216.240]) by mail.free-electrons.com (Postfix) with ESMTPSA id B2EED184B; Wed, 30 Mar 2016 22:05:33 +0200 (CEST) From: Boris Brezillon To: Thierry Reding , linux-pwm@vger.kernel.org Cc: Mike Turquette , Stephen Boyd , linux-clk@vger.kernel.org, Mark Brown , Liam Girdwood , Kamil Debski , lm-sensors@lm-sensors.org, Jean Delvare , Guenter Roeck , Dmitry Torokhov , linux-input@vger.kernel.org, Bryan Wu , Richard Purdie , Jacek Anaszewski , linux-leds@vger.kernel.org, Maxime Ripard , Chen-Yu Tsai , linux-sunxi@googlegroups.com, Joachim Eastwood , Thomas Petazzoni , Heiko Stuebner , linux-rockchip@lists.infradead.org, Jingoo Han , Lee Jones , linux-fbdev@vger.kernel.org, Jean-Christophe Plagniol-Villard , Tomi Valkeinen , Robert Jarzmik , Alexandre Belloni , Kukjin Kim , Krzysztof Kozlowski , linux-samsung-soc@vger.kernel.org, intel-gfx@lists.freedesktop.org, Daniel Vetter , Jani Nikula , Jonathan Corbet , linux-doc@vger.kernel.org, David Airlie , Daniel Vetter , dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Hartley Sweeten , Ryan Mallon , Alexander Shiyan , Milo Kim , Boris Brezillon Subject: [PATCH v5 43/46] backlight: pwm_bl: switch to the atomic PWM API Date: Wed, 30 Mar 2016 22:04:06 +0200 Message-Id: <1459368249-13241-44-git-send-email-boris.brezillon@free-electrons.com> X-Mailer: git-send-email 2.5.0 In-Reply-To: <1459368249-13241-1-git-send-email-boris.brezillon@free-electrons.com> References: <1459368249-13241-1-git-send-email-boris.brezillon@free-electrons.com> Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP pwm_config/enable/disable() have been deprecated and should be replaced by pwm_apply_state(). Signed-off-by: Boris Brezillon --- drivers/video/backlight/pwm_bl.c | 43 ++++++++++++++++++++++------------------ 1 file changed, 24 insertions(+), 19 deletions(-) diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c index 2479c11..b069fb2 100644 --- a/drivers/video/backlight/pwm_bl.c +++ b/drivers/video/backlight/pwm_bl.c @@ -43,8 +43,22 @@ struct pwm_bl_data { void (*exit)(struct device *); }; +static int compute_duty_cycle(struct pwm_bl_data *pb, int brightness) +{ + unsigned int lth = pb->lth_brightness; + int duty_cycle; + + if (pb->levels) + duty_cycle = pb->levels[brightness]; + else + duty_cycle = brightness; + + return (duty_cycle * (pb->period - lth) / pb->scale) + lth; +} + static void pwm_backlight_power_on(struct pwm_bl_data *pb, int brightness) { + struct pwm_state pstate; int err; if (pb->enabled) @@ -57,17 +71,24 @@ static void pwm_backlight_power_on(struct pwm_bl_data *pb, int brightness) if (pb->enable_gpio) gpiod_set_value(pb->enable_gpio, 1); - pwm_enable(pb->pwm); + pwm_get_state(pb->pwm, &pstate); + pstate.duty_cycle = compute_duty_cycle(pb, brightness); + pstate.enabled = true; + pwm_apply_state(pb->pwm, &pstate); pb->enabled = true; } static void pwm_backlight_power_off(struct pwm_bl_data *pb) { + struct pwm_state pstate; + if (!pb->enabled) return; - pwm_config(pb->pwm, 0, pb->period); - pwm_disable(pb->pwm); + pwm_get_state(pb->pwm, &pstate); + pstate.duty_cycle = 0; + pstate.enabled = false; + pwm_apply_state(pb->pwm, &pstate); if (pb->enable_gpio) gpiod_set_value(pb->enable_gpio, 0); @@ -76,24 +97,10 @@ static void pwm_backlight_power_off(struct pwm_bl_data *pb) pb->enabled = false; } -static int compute_duty_cycle(struct pwm_bl_data *pb, int brightness) -{ - unsigned int lth = pb->lth_brightness; - int duty_cycle; - - if (pb->levels) - duty_cycle = pb->levels[brightness]; - else - duty_cycle = brightness; - - return (duty_cycle * (pb->period - lth) / pb->scale) + lth; -} - static int pwm_backlight_update_status(struct backlight_device *bl) { struct pwm_bl_data *pb = bl_get_data(bl); int brightness = bl->props.brightness; - int duty_cycle; if (bl->props.power != FB_BLANK_UNBLANK || bl->props.fb_blank != FB_BLANK_UNBLANK || @@ -104,8 +111,6 @@ static int pwm_backlight_update_status(struct backlight_device *bl) brightness = pb->notify(pb->dev, brightness); if (brightness > 0) { - duty_cycle = compute_duty_cycle(pb, brightness); - pwm_config(pb->pwm, duty_cycle, pb->period); pwm_backlight_power_on(pb, brightness); } else pwm_backlight_power_off(pb);