From patchwork Fri Jan 15 07:02:52 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hsin-Yi Wang X-Patchwork-Id: 364019 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=-19.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, 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 D33D4C433DB for ; Fri, 15 Jan 2021 07:03:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A409722A84 for ; Fri, 15 Jan 2021 07:03:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730191AbhAOHDx (ORCPT ); Fri, 15 Jan 2021 02:03:53 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52920 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725995AbhAOHDw (ORCPT ); Fri, 15 Jan 2021 02:03:52 -0500 Received: from mail-pf1-x430.google.com (mail-pf1-x430.google.com [IPv6:2607:f8b0:4864:20::430]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2AFF4C0613C1 for ; Thu, 14 Jan 2021 23:03:12 -0800 (PST) Received: by mail-pf1-x430.google.com with SMTP id c79so4928743pfc.2 for ; Thu, 14 Jan 2021 23:03:12 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=Jl2+hlh3x6jkGwlX8WqlsLyequQpH3wXfp/SkKRuhe4=; b=Z+cBgFMgXTm78gUF5OKaiv/CgSP2yAzAPQDOk8e7Okn8sxsQ4vpnFw8EOlzyzMDao9 om3ph+cY69yK3tHyKd9mF/1IOKtChvr8Wyu8QbG/fgz94sjloBk7MP2w8sNiHHa8YxfC Qzs2gfrkxUeCuXZ0GHRHA4kdl3ff44yIgJ/xE= 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=Jl2+hlh3x6jkGwlX8WqlsLyequQpH3wXfp/SkKRuhe4=; b=tC857PmFz0agii3K2yven5COJ3VJAJ90VurqNNlHZApEc/L7Pf8i4lTaeBQJsY44j2 SRixo+PEz5sO1TSWddi/zfr7Vi3WdyYjYmQt9sQEF5Ih+WTytK03vXdTUFr1TnjvZUeP CYTycQw3CSb0kzp/h9hrXylf+/imrXsSY7Icqyvkxbud6tuZzrvmtpZ6laToYnxjynwR MyrBTkkLkiUCViIHI4S36bUhBbRigXq8AaBA7Ze5+ec4Xdl6hgwShsYyTFxQIXkzH553 NsGtqhydi0csyjChkSk0j6/Kke+WT99jvlp7ZA7ITFQAeU7o1hvoY3aVWCFhkf6bEVWK 2+Xw== X-Gm-Message-State: AOAM5330OKMqYliwvsBzKI/6Vhc/ZfAWWr9GZEc03s7fLtSiLNtC5nh+ 5QmDurD9OI6qlRK86ien+vBw3A== X-Google-Smtp-Source: ABdhPJyfblq3yeliOQGfgSMELoffZ1xsuuDx5AbEg/nZkDji079XClxuemor1VUY8+ydtI9Oo8u8Pw== X-Received: by 2002:a65:488d:: with SMTP id n13mr10912182pgs.315.1610694191580; Thu, 14 Jan 2021 23:03:11 -0800 (PST) Received: from hsinyi-z840.tpe.corp.google.com ([2401:fa00:1:10:1a60:24ff:fe89:3e93]) by smtp.gmail.com with ESMTPSA id x12sm7101064pfj.25.2021.01.14.23.03.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 14 Jan 2021 23:03:11 -0800 (PST) From: Hsin-Yi Wang To: Xin Ji , David Airlie Cc: Sam Ravnborg , Rob Herring , Daniel Vetter , Hsin-Yi Wang , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Andrzej Hajda , Neil Armstrong , Laurent Pinchart , Jonas Karlman , Jernej Skrabec Subject: [PATCH v3 2/2] drm/bridge: anx7625: disable regulators when power off Date: Fri, 15 Jan 2021 15:02:52 +0800 Message-Id: <20210115070250.2271571-2-hsinyi@chromium.org> X-Mailer: git-send-email 2.30.0.284.gd98b1dd5eaa7-goog In-Reply-To: <20210115070250.2271571-1-hsinyi@chromium.org> References: <20210115070250.2271571-1-hsinyi@chromium.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org When suspending the driver, anx7625_power_standby() will be called to turn off reset-gpios and enable-gpios. However, power supplies are not disabled. To save power, the driver can get the power supply regulators and turn off them in anx7625_power_standby(). Signed-off-by: Hsin-Yi Wang Reviewed-by: Robert Foss --- Change: v3: add delays between regulators power on --- drivers/gpu/drm/bridge/analogix/anx7625.c | 34 +++++++++++++++++++++++ drivers/gpu/drm/bridge/analogix/anx7625.h | 1 + 2 files changed, 35 insertions(+) diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c index 65cc05982f82..23283ba0c4f9 100644 --- a/drivers/gpu/drm/bridge/analogix/anx7625.c +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c @@ -11,6 +11,7 @@ #include #include #include +#include #include #include #include @@ -875,12 +876,25 @@ static int sp_tx_edid_read(struct anx7625_data *ctx, static void anx7625_power_on(struct anx7625_data *ctx) { struct device *dev = &ctx->client->dev; + int ret, i; if (!ctx->pdata.low_power_mode) { DRM_DEV_DEBUG_DRIVER(dev, "not low power mode!\n"); return; } + for (i = 0; i < ARRAY_SIZE(ctx->pdata.supplies); i++) { + ret = regulator_enable(ctx->pdata.supplies[i].consumer); + if (ret < 0) { + DRM_DEV_DEBUG_DRIVER(dev, "cannot enable supply %d: %d\n", + i, ret); + goto reg_err; + } + usleep_range(2000, 2100); + } + + usleep_range(4000, 4100); + /* Power on pin enable */ gpiod_set_value(ctx->pdata.gpio_p_on, 1); usleep_range(10000, 11000); @@ -889,11 +903,16 @@ static void anx7625_power_on(struct anx7625_data *ctx) usleep_range(10000, 11000); DRM_DEV_DEBUG_DRIVER(dev, "power on !\n"); + return; +reg_err: + for (--i; i >= 0; i--) + regulator_disable(ctx->pdata.supplies[i].consumer); } static void anx7625_power_standby(struct anx7625_data *ctx) { struct device *dev = &ctx->client->dev; + int ret; if (!ctx->pdata.low_power_mode) { DRM_DEV_DEBUG_DRIVER(dev, "not low power mode!\n"); @@ -904,6 +923,12 @@ static void anx7625_power_standby(struct anx7625_data *ctx) usleep_range(1000, 1100); gpiod_set_value(ctx->pdata.gpio_p_on, 0); usleep_range(1000, 1100); + + ret = regulator_bulk_disable(ARRAY_SIZE(ctx->pdata.supplies), + ctx->pdata.supplies); + if (ret < 0) + DRM_DEV_DEBUG_DRIVER(dev, "cannot disable supplies %d\n", ret); + DRM_DEV_DEBUG_DRIVER(dev, "power down\n"); } @@ -1742,6 +1767,15 @@ static int anx7625_i2c_probe(struct i2c_client *client, platform->client = client; i2c_set_clientdata(client, platform); + pdata->supplies[0].supply = "vdd10"; + pdata->supplies[1].supply = "vdd18"; + pdata->supplies[2].supply = "vdd33"; + ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(pdata->supplies), + pdata->supplies); + if (ret) { + DRM_DEV_ERROR(dev, "fail to get power supplies: %d\n", ret); + return ret; + } anx7625_init_gpio(platform); atomic_set(&platform->power_status, 0); diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.h b/drivers/gpu/drm/bridge/analogix/anx7625.h index 193ad86c5450..e4a086b3a3d7 100644 --- a/drivers/gpu/drm/bridge/analogix/anx7625.h +++ b/drivers/gpu/drm/bridge/analogix/anx7625.h @@ -350,6 +350,7 @@ struct s_edid_data { struct anx7625_platform_data { struct gpio_desc *gpio_p_on; struct gpio_desc *gpio_reset; + struct regulator_bulk_data supplies[3]; struct drm_bridge *panel_bridge; int intp_irq; u32 low_power_mode;