From nobody Wed Dec 17 06:04:18 2025 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 27397C4332F for ; Thu, 9 Nov 2023 10:26:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233210AbjKIK0O (ORCPT ); Thu, 9 Nov 2023 05:26:14 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43064 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233395AbjKIKZ6 (ORCPT ); Thu, 9 Nov 2023 05:25:58 -0500 Received: from madras.collabora.co.uk (madras.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e5ab]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 860BE2D6A for ; Thu, 9 Nov 2023 02:25:55 -0800 (PST) Received: from IcarusMOD.eternityproject.eu (cola.collaboradmins.com [195.201.22.229]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: kholk11) by madras.collabora.co.uk (Postfix) with ESMTPSA id 6B60E6607691; Thu, 9 Nov 2023 10:25:53 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1699525554; bh=mDPKNF83uvk33KrukPYl2Hf3G8HMp0A70irMrDutJLM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kqsJ6nVoRmEFtUhcnVFDAjprHsWTYSDkz4ZXgM6GLZv3eMK70VxWuCQshbrnZYB2X bFPG+HuoXHQJraSZV26yrDXBHO+J3ANGvYawbFDqEwKxW/wAkOPZEbBx4vNs5vHLfu Pq9IgeN89QL9Vow0QkgqF5rMZOnIIfJmclvlVSvGJLJfLtOoZdWVzaYEyzOGXFjEQ/ nk0BhqGKD7dux/fTnvhHOFSHBcVMpquJ9OUHFFix/MhGk2zkNKP6GnEapX1lG3lHu0 iJPrQDzGtCh9MHPTU6RQxbpoNI6GFbWmdlR+rhwzbpOs+rLjnTTMx4JtxPi95mnLW8 +9ZzLvLKCVXLQ== From: AngeloGioacchino Del Regno To: boris.brezillon@collabora.com Cc: robh@kernel.org, steven.price@arm.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, daniel@ffwll.ch, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, wenst@chromium.org, AngeloGioacchino Del Regno , kernel@collabora.com Subject: [PATCH v3 5/6] drm/panfrost: Implement ability to turn on/off regulators in suspend Date: Thu, 9 Nov 2023 11:25:42 +0100 Message-ID: <20231109102543.42971-6-angelogioacchino.delregno@collabora.com> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231109102543.42971-1-angelogioacchino.delregno@collabora.com> References: <20231109102543.42971-1-angelogioacchino.delregno@collabora.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Some platforms/SoCs can power off the GPU entirely by completely cutting off power, greatly enhancing battery time during system suspend: add a new pm_feature GPU_PM_VREG_OFF to allow turning off the GPU regulators during full suspend only on selected platforms. Signed-off-by: AngeloGioacchino Del Regno Reviewed-by: Steven Price --- drivers/gpu/drm/panfrost/panfrost_device.c | 19 ++++++++++++++++++- drivers/gpu/drm/panfrost/panfrost_device.h | 2 ++ 2 files changed, 20 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/panfrost/panfrost_device.c b/drivers/gpu/drm/p= anfrost/panfrost_device.c index b4ddbc3b8069..c90ad5ee34e7 100644 --- a/drivers/gpu/drm/panfrost/panfrost_device.c +++ b/drivers/gpu/drm/panfrost/panfrost_device.c @@ -431,10 +431,21 @@ static int panfrost_device_resume(struct device *dev) struct panfrost_device *pfdev =3D dev_get_drvdata(dev); int ret; =20 + if (pfdev->comp->pm_features & BIT(GPU_PM_VREG_OFF)) { + unsigned long freq =3D pfdev->pfdevfreq.fast_rate; + struct dev_pm_opp *opp; + + opp =3D dev_pm_opp_find_freq_ceil(dev, &freq); + if (IS_ERR(opp)) + return PTR_ERR(opp); + dev_pm_opp_set_opp(dev, opp); + dev_pm_opp_put(opp); + } + if (pfdev->comp->pm_features & BIT(GPU_PM_CLK_DIS)) { ret =3D clk_enable(pfdev->clock); if (ret) - return ret; + goto err_clk; =20 if (pfdev->bus_clock) { ret =3D clk_enable(pfdev->bus_clock); @@ -455,6 +466,9 @@ static int panfrost_device_resume(struct device *dev) err_bus_clk: if (pfdev->comp->pm_features & BIT(GPU_PM_CLK_DIS)) clk_disable(pfdev->clock); +err_clk: + if (pfdev->comp->pm_features & BIT(GPU_PM_VREG_OFF)) + dev_pm_opp_set_opp(dev, NULL); return ret; } =20 @@ -474,6 +488,9 @@ static int panfrost_device_suspend(struct device *dev) clk_disable(pfdev->clock); } =20 + if (pfdev->comp->pm_features & BIT(GPU_PM_VREG_OFF)) + dev_pm_opp_set_opp(dev, NULL); + return 0; } =20 diff --git a/drivers/gpu/drm/panfrost/panfrost_device.h b/drivers/gpu/drm/p= anfrost/panfrost_device.h index d7f179eb8ea3..0fc558db6bfd 100644 --- a/drivers/gpu/drm/panfrost/panfrost_device.h +++ b/drivers/gpu/drm/panfrost/panfrost_device.h @@ -28,9 +28,11 @@ struct panfrost_perfcnt; /** * enum panfrost_gpu_pm - Supported kernel power management features * @GPU_PM_CLK_DIS: Allow disabling clocks during system suspend + * @GPU_PM_VREG_OFF: Allow turning off regulators during system suspend */ enum panfrost_gpu_pm { GPU_PM_CLK_DIS, + GPU_PM_VREG_OFF, }; =20 struct panfrost_features { --=20 2.42.0