linux-hardening - [PATCH v3 07/10] drm/panthor: devfreq: make get_dev_status use get_cur

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Message-Id: <20250917-mt8196-gpufreq-v3-7-c4ede4b4399e@collabora.com>
Date: Wed, 17 Sep 2025 14:22:38 +0200
From: Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
To: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, 
 Boris Brezillon <boris.brezillon@...labora.com>, 
 Steven Price <steven.price@....com>, Liviu Dudau <liviu.dudau@....com>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Matthias Brugger <matthias.bgg@...il.com>, 
 MyungJoo Ham <myungjoo.ham@...sung.com>, 
 Kyungmin Park <kyungmin.park@...sung.com>, 
 Chanwoo Choi <cw00.choi@...sung.com>, Jassi Brar <jassisinghbrar@...il.com>, 
 Kees Cook <kees@...nel.org>, "Gustavo A. R. Silva" <gustavoars@...nel.org>, 
 Chia-I Wu <olvaffe@...il.com>, Chen-Yu Tsai <wenst@...omium.org>
Cc: kernel@...labora.com, dri-devel@...ts.freedesktop.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org, 
 linux-pm@...r.kernel.org, linux-hardening@...r.kernel.org, 
 Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
Subject: [PATCH v3 07/10] drm/panthor: devfreq: make get_dev_status use
 get_cur_freq

The only device-specific part of panthor's get_dev_status devfreq
callback is getting the clock frequency. All the other logic surrounding
what it does may be useful for other devfreq implementations however.

Make it call into get_cur_freq instead of poking the common clock
framework directly.

Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
---
 drivers/gpu/drm/panthor/panthor_devfreq.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/panthor/panthor_devfreq.c b/drivers/gpu/drm/panthor/panthor_devfreq.c
index 8903f60c0a3f06313ac2008791c210ff32b6bd52..118da7cbb3c809e4aabfef7d20914e61c2b62555 100644
--- a/drivers/gpu/drm/panthor/panthor_devfreq.c
+++ b/drivers/gpu/drm/panthor/panthor_devfreq.c
@@ -87,9 +87,13 @@ static int panthor_devfreq_get_dev_status(struct device *dev,
 {
 	struct panthor_device *ptdev = dev_get_drvdata(dev);
 	struct panthor_devfreq *pdevfreq = ptdev->devfreq;
+	struct devfreq_dev_profile *p = pdevfreq->devfreq->profile;
 	unsigned long irqflags;
+	int ret;

-	status->current_frequency = clk_get_rate(ptdev->clks.core);
+	ret = p->get_cur_freq(dev, &status->current_frequency);
+	if (ret)
+		return ret;

 	spin_lock_irqsave(&pdevfreq->lock, irqflags);

-- 
2.51.0