From patchwork Sun Jun 30 15:01:40 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rob Clark X-Patchwork-Id: 11024433 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B0A07138B for ; Sun, 30 Jun 2019 15:02:53 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A1603284FC for ; Sun, 30 Jun 2019 15:02:53 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9572128553; Sun, 30 Jun 2019 15:02:53 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_ADSP_CUSTOM_MED, FREEMAIL_FROM,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 398DB284FC for ; Sun, 30 Jun 2019 15:02:53 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 7BCF889D1D; Sun, 30 Jun 2019 15:02:52 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail-qt1-x842.google.com (mail-qt1-x842.google.com [IPv6:2607:f8b0:4864:20::842]) by gabe.freedesktop.org (Postfix) with ESMTPS id E7ABD89D00; Sun, 30 Jun 2019 15:02:51 +0000 (UTC) Received: by mail-qt1-x842.google.com with SMTP id m29so11927059qtu.1; Sun, 30 Jun 2019 08:02:51 -0700 (PDT) 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=QyVCRwDG/FzMILKy+0D6jsU2j8VALwyqKuHip6bg8Vc=; b=iVNumclWoR4wmwW8lMNOv6+7hn3rfIgKLzza203TqlQFPlNGwP0GOYOm7hrM4Rjsjs q/haRVtMq5dJdjugyuvOjzt+DPfsYbBBZiHC4JuKWwpBxTQjbU6iEogfwwTqSXAa9wV3 H3uiZ1iuAS7sWgbI5++aMzvQmivpDTPiTANTiDFS2frb0tgLzXFodr2lXOIH2gx/LT8T bniCnad8zyzgiEoaB3Fxkw/mtMU4YG7T0Slh9btGC7dZYL6ocQh39BEAb2FrSU0meTr/ eeIOpa+9DUsIMWq8Fdl4dAz5MnViokYhoe7w2b8MnfyYeLxf6awRy1sH3u4DHymTOCCW ThyA== X-Gm-Message-State: APjAAAUkad3joXxKo+uoMol+Jg2WBxSad46zLWrBLQ8KRyvozjnadR77 wSD3MbzqSQ6alt9D5VQhVOGAkeiO02U= X-Google-Smtp-Source: APXvYqxJiD29r7kDOv7GdXwuwUbbUFFMJl7hp70rUwmafDTTAolfz3i7ezUr8GVYHQgKtZ9R6qpXlw== X-Received: by 2002:ac8:3811:: with SMTP id q17mr15849886qtb.315.1561906970879; Sun, 30 Jun 2019 08:02:50 -0700 (PDT) Received: from localhost ([2601:184:4780:7861:5010:5849:d76d:b714]) by smtp.gmail.com with ESMTPSA id q36sm4115062qtc.12.2019.06.30.08.02.50 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Sun, 30 Jun 2019 08:02:50 -0700 (PDT) From: Rob Clark To: dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org Subject: [PATCH 2/5] genpd/gdsc: inherit display powerdomain from bootloader Date: Sun, 30 Jun 2019 08:01:40 -0700 Message-Id: <20190630150230.7878-3-robdclark@gmail.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190630150230.7878-1-robdclark@gmail.com> References: <20190630150230.7878-1-robdclark@gmail.com> MIME-Version: 1.0 X-Mailman-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=QyVCRwDG/FzMILKy+0D6jsU2j8VALwyqKuHip6bg8Vc=; b=vKHUswvI6acNk5JHHOslBw5H1xZCtlqz7wxsVgnwV8/xPkF38zAHVioXhSkIxmqf5l 3/zdZZkZhuWugtkYlNiUG3Au/C9JDLDtJ8jdod8Btp9V1fzI7hCmZH+JZ7XmHaKkUSNf gEzzQ9uzkp8bxXdWb7ZwVbK961QW0T7bLjX8flaFCBsxzfVFmIHTuN3AiMLpVHlp/1uP VGOhEEwHEjC26dn4y+JpfYkpmPQcpcoC24oe8Qeaf0ldO6+fqT3Y0PIARHlm2DJjLdZl iR81+tF5oAknkkjxVGcrUMij4KsH+fosAGbQDSnhP+Q+5QVkz7VrtzG0pEO0A+VP/Nzv QKKg== X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Rob Clark , aarch64-laptops@lists.linaro.org, Ulf Hansson , Len Brown , linux-pm@vger.kernel.org, Stephen Boyd , Greg Kroah-Hartman , Michael Turquette , Kevin Hilman , "Rafael J. Wysocki" , linux-kernel@vger.kernel.org, Andy Gross , Pavel Machek , freedreno@lists.freedesktop.org, linux-clk@vger.kernel.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Rob Clark Mark power domains that may be enabled by bootloader, and which should not be disabled until a driver takes them over. This keeps efifb alive until the real driver can be probed. In a distro kernel, the driver will most likely built as a module, and not probed until we get to userspace (after late_initcall) Signed-off-by: Rob Clark Reviewed-by: Jeffrey Hugo --- drivers/base/power/domain.c | 10 ++++++++++ drivers/clk/qcom/dispcc-sdm845.c | 2 +- drivers/clk/qcom/gdsc.c | 5 +++++ drivers/clk/qcom/gdsc.h | 1 + include/linux/pm_domain.h | 4 ++++ 5 files changed, 21 insertions(+), 1 deletion(-) diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 33c30c1e6a30..513a8655fbd7 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -537,6 +537,16 @@ static int genpd_power_off(struct generic_pm_domain *genpd, bool one_dev_on, not_suspended++; } + /* + * If the power domain is enabled by the bootloader (for example + * display enabled by bootloader), but no devices attached yet + * (perhaps because driver built as kernel module), then do not + * suspend. + */ + if ((genpd->flags & GENPD_FLAG_INHERIT_BL) && + list_empty(&genpd->dev_list)) + not_suspended++; + if (not_suspended > 1 || (not_suspended == 1 && !one_dev_on)) return -EBUSY; diff --git a/drivers/clk/qcom/dispcc-sdm845.c b/drivers/clk/qcom/dispcc-sdm845.c index 40d7e0ab4340..1d9365ac2315 100644 --- a/drivers/clk/qcom/dispcc-sdm845.c +++ b/drivers/clk/qcom/dispcc-sdm845.c @@ -575,7 +575,7 @@ static struct gdsc mdss_gdsc = { .name = "mdss_gdsc", }, .pwrsts = PWRSTS_OFF_ON, - .flags = HW_CTRL | POLL_CFG_GDSCR, + .flags = HW_CTRL | POLL_CFG_GDSCR | INHERIT_BL, }; static struct clk_regmap *disp_cc_sdm845_clocks[] = { diff --git a/drivers/clk/qcom/gdsc.c b/drivers/clk/qcom/gdsc.c index a250f59708d8..4639fbeb9a7f 100644 --- a/drivers/clk/qcom/gdsc.c +++ b/drivers/clk/qcom/gdsc.c @@ -331,6 +331,11 @@ static int gdsc_init(struct gdsc *sc) if ((sc->flags & VOTABLE) && on) gdsc_enable(&sc->pd); + if ((sc->flags & INHERIT_BL) && on) { + pr_debug("gdsc: %s is enabled from bootloader!\n", sc->pd.name); + sc->pd.flags |= GENPD_FLAG_INHERIT_BL; + } + /* If ALWAYS_ON GDSCs are not ON, turn them ON */ if (sc->flags & ALWAYS_ON) { if (!on) diff --git a/drivers/clk/qcom/gdsc.h b/drivers/clk/qcom/gdsc.h index 64cdc8cf0d4d..c6fe56247399 100644 --- a/drivers/clk/qcom/gdsc.h +++ b/drivers/clk/qcom/gdsc.h @@ -49,6 +49,7 @@ struct gdsc { #define AON_RESET BIT(4) #define POLL_CFG_GDSCR BIT(5) #define ALWAYS_ON BIT(6) +#define INHERIT_BL BIT(7) struct reset_controller_dev *rcdev; unsigned int *resets; unsigned int reset_count; diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h index 91d9bf497071..5e421afcf6f3 100644 --- a/include/linux/pm_domain.h +++ b/include/linux/pm_domain.h @@ -55,6 +55,9 @@ * * GENPD_FLAG_RPM_ALWAYS_ON: Instructs genpd to always keep the PM domain * powered on except for system suspend. + * + * GENPD_FLAG_INHERIT_BL: The bootloader has already enabled this power + * domain. */ #define GENPD_FLAG_PM_CLK (1U << 0) #define GENPD_FLAG_IRQ_SAFE (1U << 1) @@ -62,6 +65,7 @@ #define GENPD_FLAG_ACTIVE_WAKEUP (1U << 3) #define GENPD_FLAG_CPU_DOMAIN (1U << 4) #define GENPD_FLAG_RPM_ALWAYS_ON (1U << 5) +#define GENPD_FLAG_INHERIT_BL (1U << 6) enum gpd_status { GPD_STATE_ACTIVE = 0, /* PM domain is active */