From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from sender4-pp-f112.zoho.com (sender4-pp-f112.zoho.com [136.143.188.112]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 560AB1E868; Thu, 26 Mar 2026 15:33:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=pass smtp.client-ip=136.143.188.112 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774539188; cv=pass; b=INQ9AFBhJoU6+eUXIBILG1R0AOndQdfbDfgVAm/Y7sR9IAWEa5STBHN1CcvRZhzBtZqtn/epJuoBFOJ8x3vEnGhTbMwc8wOGyp1SWZg5iVnkaADCOm9mxiK9PRT9sy8J7izqOdbVWoxVrmaVm5/Sb08OGLH6mB8rPEIEitLXFXg= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774539188; c=relaxed/simple; bh=lyX4mDuWAivwI+NVS931cuZ6UIrTRKPF6SJGMWMwI8o=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=GZvaaT7SN8S4acACL9mFdwa9cs2AgrchTbx/tnIE6jLybX925q/YHKireijvWFHvf9RYPcJQUtR/km9qS3PstSmkPXdg8Zx9/p3Snvh4XhXLjdtEh+TodpAzVQPAAeb6NvWB6ELW16TuAdcJpYjW2Cwx5F24p9UXyX3gZbuoA7o= ARC-Authentication-Results:i=2; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com; spf=pass smtp.mailfrom=collabora.com; dkim=pass (1024-bit key) header.d=collabora.com header.i=adrian.larumbe@collabora.com header.b=ToZpJbJC; arc=pass smtp.client-ip=136.143.188.112 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=collabora.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=collabora.com header.i=adrian.larumbe@collabora.com header.b="ToZpJbJC" ARC-Seal: i=1; a=rsa-sha256; t=1774539166; cv=none; d=zohomail.com; s=zohoarc; b=P9947dORHl9g3ldLyNIdMFXw90ZL1kGKAuNr37DTFG+qd5goWJVFxSMJTnrVO68oB5cwD0fM6YCBV4j+po2CGa0BxoOX2Xsa/sHWcj0P7DDgEkC1WtIGg5bvpNjHWyfE6M53Cu87aGJ5ONOSjdcHpdFmea9blbR41G2HIep/svU= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1774539166; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:MIME-Version:Message-ID:References:Subject:Subject:To:To:Message-Id:Reply-To; bh=1WOoGV4b22+v+li+Na+6Um69R+tGDjyr9vnEy8DGxYg=; b=NTxbHI+Zpv0aFqMGPwAGQB9aAKObZdhrliJZWCH4lm+Js8npaBz0Nu0pDUGCerE+aW+aoZFrAWol6p0bhpHBaAvJC4Bk18XPMfWePi62gOBBgZMcxSV+BCusqEGLOfeMYmUxsU9Lk4FWNtnSkmHQIJKIq0So6woVVgHY/lV9z7Y= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=collabora.com; spf=pass smtp.mailfrom=adrian.larumbe@collabora.com; dmarc=pass header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1774539166; s=zohomail; d=collabora.com; i=adrian.larumbe@collabora.com; h=Date:Date:From:From:To:To:Cc:Cc:Subject:Subject:Message-ID:References:MIME-Version:Content-Type:Content-Transfer-Encoding:In-Reply-To:Message-Id:Reply-To; bh=1WOoGV4b22+v+li+Na+6Um69R+tGDjyr9vnEy8DGxYg=; b=ToZpJbJCiOZguELIXEfvmHQBls5WFFXtIMnGH4VtT3wbTzesV4lxiX4z0DKtTGoh eRMDC5RnVr/a9W8XzK+qWP/J60WnkUVqQFQAwXIVV2uxdAj2NckpQ5skloVakbL+YYk Bs2j6ZHhtODlKF0/NiWWSTK8NwMF2UiqFDMqDVzA= Received: by mx.zohomail.com with SMTPS id 1774539163745938.0661014333109; Thu, 26 Mar 2026 08:32:43 -0700 (PDT) Date: Thu, 26 Mar 2026 15:32:38 +0000 From: =?utf-8?Q?Adri=C3=A1n?= Larumbe To: Biju Cc: Boris Brezillon , Rob Herring , Steven Price , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Biju Das , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Geert Uytterhoeven , Prabhakar Mahadev Lad , linux-renesas-soc@vger.kernel.org Subject: Re: [PATCH v2 2/4] drm/panfrost: Drop redundant optional clock checks in runtime PM Message-ID: References: <20260320164158.487406-1-biju.das.jz@bp.renesas.com> <20260320164158.487406-3-biju.das.jz@bp.renesas.com> Precedence: bulk X-Mailing-List: linux-renesas-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20260320164158.487406-3-biju.das.jz@bp.renesas.com> Reviewed-by: Adrián Larumbe On 20.03.2026 16:41, Biju wrote: > From: Biju Das > > The clk_enable() and clk_disable() APIs already handle NULL clock pointers > gracefully — clk_enable() returns 0 and clk_disable() returns immediately > when passed a NULL or optional clock. The explicit if (pfdev->bus_clock) > guards around these calls in the runtime suspend/resume paths are > therefore unnecessary. Remove them to simplify the code. > > Reviewed-by: Steven Price > Signed-off-by: Biju Das > --- > v1->v2: > * Collected tag > --- > drivers/gpu/drm/panfrost/panfrost_device.c | 12 ++++-------- > 1 file changed, 4 insertions(+), 8 deletions(-) > > diff --git a/drivers/gpu/drm/panfrost/panfrost_device.c b/drivers/gpu/drm/panfrost/panfrost_device.c > index dedc13e56631..01e702a0b2f0 100644 > --- a/drivers/gpu/drm/panfrost/panfrost_device.c > +++ b/drivers/gpu/drm/panfrost/panfrost_device.c > @@ -429,11 +429,9 @@ static int panfrost_device_runtime_resume(struct device *dev) > if (ret) > goto err_clk; > > - if (pfdev->bus_clock) { > - ret = clk_enable(pfdev->bus_clock); > - if (ret) > - goto err_bus_clk; > - } > + ret = clk_enable(pfdev->bus_clock); > + if (ret) > + goto err_bus_clk; > } > > panfrost_device_reset(pfdev, true); > @@ -464,9 +462,7 @@ static int panfrost_device_runtime_suspend(struct device *dev) > panfrost_gpu_power_off(pfdev); > > if (pfdev->comp->pm_features & BIT(GPU_PM_RT)) { > - if (pfdev->bus_clock) > - clk_disable(pfdev->bus_clock); > - > + clk_disable(pfdev->bus_clock); > clk_disable(pfdev->clock); > reset_control_assert(pfdev->rstc); > } > -- > 2.43.0 Adrian Larumbe