From patchwork Mon Jun 29 17:20:38 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Marek X-Patchwork-Id: 249809 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=-10.0 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, 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 70B8EC433E2 for ; Mon, 29 Jun 2020 21:44:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3C1A720786 for ; Mon, 29 Jun 2020 21:44:44 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=marek-ca.20150623.gappssmtp.com header.i=@marek-ca.20150623.gappssmtp.com header.b="cakXMdhc" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726953AbgF2Vod (ORCPT ); Mon, 29 Jun 2020 17:44:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37556 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726792AbgF2Shq (ORCPT ); Mon, 29 Jun 2020 14:37:46 -0400 Received: from mail-qv1-xf42.google.com (mail-qv1-xf42.google.com [IPv6:2607:f8b0:4864:20::f42]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 04DE1C031435 for ; Mon, 29 Jun 2020 10:21:13 -0700 (PDT) Received: by mail-qv1-xf42.google.com with SMTP id u8so7982699qvj.12 for ; Mon, 29 Jun 2020 10:21:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=marek-ca.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=MEAgnaM7D2mpY2dMCdUXKcsS9ZNQb7s4gUJ6O4bO1VY=; b=cakXMdhcddci1jYVi33hSFcTaWjtdUzX5bG+pUizoRKtavcztv5pEaTMcR3xhC3pwc +oFlbm5GPeRBw6/yBHNsb2PyDNdKFFm6cLRFu/zWPqDKIvOXOvdhN1DSUWkxKIG6LYo7 7kuDTw4b5e4x8NwN5PFfMI26gd4OmiBKT4kbnvRmOOO/rEe0QQoio1VL2pUsNlGYIY9h eY/oYmNlpRRKzpOVUzXibc/63n8GQvOUrjdP4mAiJ865Fn2NvzdH9ZhPFjWhgcGc/urt gOmvnB8AoQFacwoRRRA8YESi0slDXE6DWDqu7dZyzgerrRtYZ0jk90J5sX3fxzoWzuAP JPhA== 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=MEAgnaM7D2mpY2dMCdUXKcsS9ZNQb7s4gUJ6O4bO1VY=; b=M2S3bz0PvB130KX3g5x/DJ9jxSwuiOQoSpZ6h4z5+Fdm2cBeLggfHp2FjV9GIXrFtv COH4n+sGbxrPaNlMxw8b3GH6EfNrUkmoc0QQPQx1QKOSsMk8Y52WGw+uNmjy/e4eSiJ+ jBjEyfvTiiiild6GFT1s24HMFUAOfdFcBZWt0PrgY+Yy/XpJdAlvihr8CKTnZ9aHWXUi j2eVwN5FZavWSOuXUc+gKNtVJg5e5Ig5c86NTsRULr+pfM6/IDRZ2+J+i3JGc3H9s8vX AoAlDAXltpxcPOl4WUb+gwMi05Y3cOLFwwmREilXKPbMQPV+yctQEb2PsE5zGkZaD34j hxaA== X-Gm-Message-State: AOAM531RWGJNGZrHqH03GakW6myegVnC90jHhp410Xye7LRnCgX6BtnT //sX4wGUNa7LZnvdBZ4xB8qORdXiUSY= X-Google-Smtp-Source: ABdhPJyaLd6au1/0WA+lxGsA1HcU8jMvhnK/QtKjdcrss2tNZZ0jSr2bU65AOstsV9I+9d+Bn3UceA== X-Received: by 2002:a05:6214:9af:: with SMTP id du15mr16068477qvb.188.1593451271974; Mon, 29 Jun 2020 10:21:11 -0700 (PDT) Received: from localhost.localdomain ([147.253.86.153]) by smtp.gmail.com with ESMTPSA id q5sm408363qtf.12.2020.06.29.10.21.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 29 Jun 2020 10:21:11 -0700 (PDT) From: Jonathan Marek To: linux-arm-msm@vger.kernel.org Cc: Andy Gross , Bjorn Andersson , Michael Turquette , Stephen Boyd , linux-clk@vger.kernel.org (open list:COMMON CLK FRAMEWORK), linux-kernel@vger.kernel.org (open list) Subject: [PATCH v2 08/13] clk: qcom: add common gdsc_gx_do_nothing_enable for gpucc drivers Date: Mon, 29 Jun 2020 13:20:38 -0400 Message-Id: <20200629172049.30452-9-jonathan@marek.ca> X-Mailer: git-send-email 2.26.1 In-Reply-To: <20200629172049.30452-1-jonathan@marek.ca> References: <20200629172049.30452-1-jonathan@marek.ca> MIME-Version: 1.0 Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org All gpucc drivers need this, so move it to common code instead of duplicating it in every gpucc driver. Signed-off-by: Jonathan Marek --- drivers/clk/qcom/gdsc.c | 25 +++++++++++++++++++++++++ drivers/clk/qcom/gdsc.h | 1 + drivers/clk/qcom/gpucc-sc7180.c | 27 +-------------------------- drivers/clk/qcom/gpucc-sdm845.c | 27 +-------------------------- 4 files changed, 28 insertions(+), 52 deletions(-) diff --git a/drivers/clk/qcom/gdsc.c b/drivers/clk/qcom/gdsc.c index 04944f11659b..628397703717 100644 --- a/drivers/clk/qcom/gdsc.c +++ b/drivers/clk/qcom/gdsc.c @@ -433,3 +433,28 @@ void gdsc_unregister(struct gdsc_desc *desc) } of_genpd_del_provider(dev->of_node); } + +/* + * On SDM845+ the GPU GX domain is *almost* entirely controlled by the GMU + * running in the CX domain so the CPU doesn't need to know anything about the + * GX domain EXCEPT.... + * + * Hardware constraints dictate that the GX be powered down before the CX. If + * the GMU crashes it could leave the GX on. In order to successfully bring back + * the device the CPU needs to disable the GX headswitch. There being no sane + * way to reach in and touch that register from deep inside the GPU driver we + * need to set up the infrastructure to be able to ensure that the GPU can + * ensure that the GX is off during this super special case. We do this by + * defining a GX gdsc with a dummy enable function and a "default" disable + * function. + * + * This allows us to attach with genpd_dev_pm_attach_by_name() in the GPU + * driver. During power up, nothing will happen from the CPU (and the GMU will + * power up normally but during power down this will ensure that the GX domain + * is *really* off - this gives us a semi standard way of doing what we need. + */ +int gdsc_gx_do_nothing_enable(struct generic_pm_domain *domain) +{ + /* Do nothing but give genpd the impression that we were successful */ + return 0; +} diff --git a/drivers/clk/qcom/gdsc.h b/drivers/clk/qcom/gdsc.h index c36fc26dcdff..1896bfb2bbd1 100644 --- a/drivers/clk/qcom/gdsc.h +++ b/drivers/clk/qcom/gdsc.h @@ -68,6 +68,7 @@ struct gdsc_desc { int gdsc_register(struct gdsc_desc *desc, struct reset_controller_dev *, struct regmap *); void gdsc_unregister(struct gdsc_desc *desc); +int gdsc_gx_do_nothing_enable(struct generic_pm_domain *domain); #else static inline int gdsc_register(struct gdsc_desc *desc, struct reset_controller_dev *rcdev, diff --git a/drivers/clk/qcom/gpucc-sc7180.c b/drivers/clk/qcom/gpucc-sc7180.c index 7b656b6aeced..88a739b6fec3 100644 --- a/drivers/clk/qcom/gpucc-sc7180.c +++ b/drivers/clk/qcom/gpucc-sc7180.c @@ -170,37 +170,12 @@ static struct gdsc cx_gdsc = { .flags = VOTABLE, }; -/* - * On SC7180 the GPU GX domain is *almost* entirely controlled by the GMU - * running in the CX domain so the CPU doesn't need to know anything about the - * GX domain EXCEPT.... - * - * Hardware constraints dictate that the GX be powered down before the CX. If - * the GMU crashes it could leave the GX on. In order to successfully bring back - * the device the CPU needs to disable the GX headswitch. There being no sane - * way to reach in and touch that register from deep inside the GPU driver we - * need to set up the infrastructure to be able to ensure that the GPU can - * ensure that the GX is off during this super special case. We do this by - * defining a GX gdsc with a dummy enable function and a "default" disable - * function. - * - * This allows us to attach with genpd_dev_pm_attach_by_name() in the GPU - * driver. During power up, nothing will happen from the CPU (and the GMU will - * power up normally but during power down this will ensure that the GX domain - * is *really* off - this gives us a semi standard way of doing what we need. - */ -static int gx_gdsc_enable(struct generic_pm_domain *domain) -{ - /* Do nothing but give genpd the impression that we were successful */ - return 0; -} - static struct gdsc gx_gdsc = { .gdscr = 0x100c, .clamp_io_ctrl = 0x1508, .pd = { .name = "gx_gdsc", - .power_on = gx_gdsc_enable, + .power_on = gdsc_gx_do_nothing_enable, }, .pwrsts = PWRSTS_OFF_ON, .flags = CLAMP_IO, diff --git a/drivers/clk/qcom/gpucc-sdm845.c b/drivers/clk/qcom/gpucc-sdm845.c index e40efba1bf7d..5663698b306b 100644 --- a/drivers/clk/qcom/gpucc-sdm845.c +++ b/drivers/clk/qcom/gpucc-sdm845.c @@ -131,37 +131,12 @@ static struct gdsc gpu_cx_gdsc = { .flags = VOTABLE, }; -/* - * On SDM845 the GPU GX domain is *almost* entirely controlled by the GMU - * running in the CX domain so the CPU doesn't need to know anything about the - * GX domain EXCEPT.... - * - * Hardware constraints dictate that the GX be powered down before the CX. If - * the GMU crashes it could leave the GX on. In order to successfully bring back - * the device the CPU needs to disable the GX headswitch. There being no sane - * way to reach in and touch that register from deep inside the GPU driver we - * need to set up the infrastructure to be able to ensure that the GPU can - * ensure that the GX is off during this super special case. We do this by - * defining a GX gdsc with a dummy enable function and a "default" disable - * function. - * - * This allows us to attach with genpd_dev_pm_attach_by_name() in the GPU - * driver. During power up, nothing will happen from the CPU (and the GMU will - * power up normally but during power down this will ensure that the GX domain - * is *really* off - this gives us a semi standard way of doing what we need. - */ -static int gx_gdsc_enable(struct generic_pm_domain *domain) -{ - /* Do nothing but give genpd the impression that we were successful */ - return 0; -} - static struct gdsc gpu_gx_gdsc = { .gdscr = 0x100c, .clamp_io_ctrl = 0x1508, .pd = { .name = "gpu_gx_gdsc", - .power_on = gx_gdsc_enable, + .power_on = gdsc_gx_do_nothing_enable, }, .pwrsts = PWRSTS_OFF_ON, .flags = CLAMP_IO | AON_RESET | POLL_CFG_GDSCR,