From patchwork Mon Jan 2 10:48:29 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Akhil P Oommen X-Patchwork-Id: 638463 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id F2E05C54EF1 for ; Mon, 2 Jan 2023 10:49:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232500AbjABKtz (ORCPT ); Mon, 2 Jan 2023 05:49:55 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50708 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232481AbjABKtf (ORCPT ); Mon, 2 Jan 2023 05:49:35 -0500 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0EA3EB25; Mon, 2 Jan 2023 02:49:34 -0800 (PST) Received: from pps.filterd (m0279863.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 302AQxmD020756; Mon, 2 Jan 2023 10:49:07 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=qcppdkim1; bh=8lqJjL9jHslmMbRzyPjVaNyVeIhX99Na9q9L69myhZU=; b=cdiTahRd3tYluyKKrVsfQhnW9N+KGQAaAsrZ7dgfNT5odizKrKCwQvhlmBD5CsHCZf1V ihdF54yPYNdLLgQozIScDNQZjfWTEf09CorGXnfbzBWpNdu0oIHCtSvVn/OcPyM1BF7m TulYs5xsARt0/TZXon/zLcFjxTBk01tdnjH44Y5OQ2QaTvN+mLW9gXFYQrBI6AmibtKP IuWKWCtVbFheEKjInpBunQ5uH4CetQN432LRQmuXf29TIUdQWI7tT2hZb7BYFYRW/k4H lUvpfWmXwS7U5fbz3b6eh//K9IExCUhXscdMYcJ2QmxmcLuJ8Kxe+AIBojxbmMy4PeUo YA== Received: from nalasppmta04.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3mtdabamej-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 02 Jan 2023 10:49:07 +0000 Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA04.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 302An6Rs007424 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 2 Jan 2023 10:49:06 GMT Received: from hyd-lnxbld559.qualcomm.com (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.36; Mon, 2 Jan 2023 02:49:00 -0800 From: Akhil P Oommen To: freedreno , , , Rob Clark , Ulf Hansson , Bjorn Andersson , Stephen Boyd , Philipp Zabel CC: Akhil P Oommen , Abhinav Kumar , Daniel Vetter , David Airlie , Dmitry Baryshkov , "Douglas Anderson" , Geert Uytterhoeven , Guenter Roeck , Konrad Dybcio , Sean Paul , Subject: [PATCH v5 3/5] drm/msm/a6xx: Vote for cx gdsc from gpu driver Date: Mon, 2 Jan 2023 16:18:29 +0530 Message-ID: <20230102161757.v5.3.I7f545d8494dcdbe6e96a15fbe8aaf5bb0c003d50@changeid> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1672656511-1931-1-git-send-email-quic_akhilpo@quicinc.com> References: <1672656511-1931-1-git-send-email-quic_akhilpo@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: axuk3QOS2xzrB1blzC4lzWRmyNnkLIC6 X-Proofpoint-ORIG-GUID: axuk3QOS2xzrB1blzC4lzWRmyNnkLIC6 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.923,Hydra:6.0.545,FMLib:17.11.122.1 definitions=2023-01-02_06,2022-12-30_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 malwarescore=0 adultscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 impostorscore=0 suspectscore=0 bulkscore=0 clxscore=1015 phishscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2301020098 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org When a device has multiple power domains, dev->power_domain is left empty during probe. That didn't cause any issue so far because we are freeloading on smmu driver's vote on cx gdsc. Instead of that, create a device_link between cx genpd device and gmu device to keep a vote from gpu driver. Before this patch: localhost ~ # cat /sys/kernel/debug/pm_genpd/pm_genpd_summary gx_gdsc on 0 /devices/genpd:1:3d6a000.gmu active 0 cx_gdsc on 0 /devices/platform/soc@0/3da0000.iommu active 0 After this patch: localhost ~ # cat /sys/kernel/debug/pm_genpd/pm_genpd_summary gx_gdsc on 0 /devices/genpd:1:3d6a000.gmu active 0 cx_gdsc on 0 /devices/platform/soc@0/3da0000.iommu active 0 /devices/genpd:0:3d6a000.gmu active 0 Signed-off-by: Akhil P Oommen Reviewed-by: Ulf Hansson --- (no changes since v1) drivers/gpu/drm/msm/adreno/a6xx_gmu.c | 31 +++++++++++++++++++++++++++---- drivers/gpu/drm/msm/adreno/a6xx_gmu.h | 1 + 2 files changed, 28 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c index 6484b97c5344..1580d0090f35 100644 --- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c +++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c @@ -1479,6 +1479,12 @@ void a6xx_gmu_remove(struct a6xx_gpu *a6xx_gpu) pm_runtime_force_suspend(gmu->dev); + /* + * Since cxpd is a virt device, the devlink with gmu-dev will be removed + * automatically when we do detach + */ + dev_pm_domain_detach(gmu->cxpd, false); + if (!IS_ERR_OR_NULL(gmu->gxpd)) { pm_runtime_disable(gmu->gxpd); dev_pm_domain_detach(gmu->gxpd, false); @@ -1605,8 +1611,10 @@ int a6xx_gmu_init(struct a6xx_gpu *a6xx_gpu, struct device_node *node) if (adreno_is_a650_family(adreno_gpu)) { gmu->rscc = a6xx_gmu_get_mmio(pdev, "rscc"); - if (IS_ERR(gmu->rscc)) + if (IS_ERR(gmu->rscc)) { + ret = -ENODEV; goto err_mmio; + } } else { gmu->rscc = gmu->mmio + 0x23000; } @@ -1615,8 +1623,22 @@ int a6xx_gmu_init(struct a6xx_gpu *a6xx_gpu, struct device_node *node) gmu->hfi_irq = a6xx_gmu_get_irq(gmu, pdev, "hfi", a6xx_hfi_irq); gmu->gmu_irq = a6xx_gmu_get_irq(gmu, pdev, "gmu", a6xx_gmu_irq); - if (gmu->hfi_irq < 0 || gmu->gmu_irq < 0) + if (gmu->hfi_irq < 0 || gmu->gmu_irq < 0) { + ret = -ENODEV; + goto err_mmio; + } + + gmu->cxpd = dev_pm_domain_attach_by_name(gmu->dev, "cx"); + if (IS_ERR(gmu->cxpd)) { + ret = PTR_ERR(gmu->cxpd); goto err_mmio; + } + + if (!device_link_add(gmu->dev, gmu->cxpd, + DL_FLAG_PM_RUNTIME)) { + ret = -ENODEV; + goto detach_cxpd; + } /* * Get a link to the GX power domain to reset the GPU in case of GMU @@ -1634,6 +1656,9 @@ int a6xx_gmu_init(struct a6xx_gpu *a6xx_gpu, struct device_node *node) return 0; +detach_cxpd: + dev_pm_domain_detach(gmu->cxpd, false); + err_mmio: iounmap(gmu->mmio); if (platform_get_resource_byname(pdev, IORESOURCE_MEM, "rscc")) @@ -1641,8 +1666,6 @@ int a6xx_gmu_init(struct a6xx_gpu *a6xx_gpu, struct device_node *node) free_irq(gmu->gmu_irq, gmu); free_irq(gmu->hfi_irq, gmu); - ret = -ENODEV; - err_memory: a6xx_gmu_memory_free(gmu); err_put_device: diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.h b/drivers/gpu/drm/msm/adreno/a6xx_gmu.h index e034935b3986..5a42dd4dd31f 100644 --- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.h +++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.h @@ -56,6 +56,7 @@ struct a6xx_gmu { int gmu_irq; struct device *gxpd; + struct device *cxpd; int idle_level;