From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id C42E92C21DF for ; Mon, 8 Jun 2026 16:06:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780934803; cv=none; b=NmHgoDoqlI7r+3iDE5H8hNxyXl68nmfbHLGujTKKacjNYtrmU6B1Io8NVSxymon77DHIMnm69T7eplix2TUo/7X0Qrp5ookvMd8oLIW15yje1e/+cMUkrV3YZ44G1UaqrD53ailOAJELs+d6Vipvme3Fn7KOBkmXzvX/Z4BJ6kM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780934803; c=relaxed/simple; bh=4TVd+FPhUWGa/XCX0CLqCRT2+tOLqtqx9WCwAD634gY=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=ByCvS9VEDMOA3TauZ1hwE0jsdfNOKtK+hnfNjiPpC4SyYqsTOWWHNtCbrsZPIbfU8CzOLnp6ekdM0daY1rQCwAWaj4kguL4xCouVoqHwKO/5XesF/mI7U1UceC0epxhl4eo4Go+oMNuwSy+OyW3tX/DGCGFUmxrRvbdTKUN17HU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b=HefauTVU; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b="HefauTVU" Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 6363E201B; Mon, 8 Jun 2026 09:06:37 -0700 (PDT) Received: from [10.57.28.93] (unknown [10.57.28.93]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 9D7E63FD88; Mon, 8 Jun 2026 09:06:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1780934802; bh=4TVd+FPhUWGa/XCX0CLqCRT2+tOLqtqx9WCwAD634gY=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=HefauTVUZavGNb/19w2Yx0UiagnGIKG2AqF4iKkPsRZ7pnrUDuJiQcm169oH0xN+u F1tlyn2QO6g4x0CBgrgqbNMvyByFnSC4rKubW8nAoF+QF0ESzyH4y1/KTjFHw0t5hl 2ZeMuES5R98GM08CE8jtlNgP3VZRwKMq64/z2ghg= Message-ID: Date: Mon, 8 Jun 2026 17:06:38 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC PATCH 01/18] drm/panthor: Ignore -EOPNOTSUPP for shader-present nvmem lookup To: Karunika Choo , dri-devel@lists.freedesktop.org Cc: nd@arm.com, Boris Brezillon , Liviu Dudau , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , linux-kernel@vger.kernel.org References: <20260528150546.3168527-1-karunika.choo@arm.com> <20260528150546.3168527-2-karunika.choo@arm.com> From: Steven Price Content-Language: en-GB In-Reply-To: <20260528150546.3168527-2-karunika.choo@arm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 28/05/2026 16:05, Karunika Choo wrote: > When CONFIG_NVMEM is disabled, reading the optional "shader-present" > nvmem cell can return -EOPNOTSUPP. > > Treat this the same as the cell being absent so panthor can continue > probing on platforms that do not provide shader-present fuses through > nvmem. > > Signed-off-by: Karunika Choo Reviewed-by: Steven Price Do we need a fixes too? Fixes: c40b50c3cfbe ("drm/panthor: Implement reading shader_present from nvmem") Thanks, Steve > --- > drivers/gpu/drm/panthor/panthor_hw.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/panthor/panthor_hw.c b/drivers/gpu/drm/panthor/panthor_hw.c > index 7e315708ca7c..4c96573b649a 100644 > --- a/drivers/gpu/drm/panthor/panthor_hw.c > +++ b/drivers/gpu/drm/panthor/panthor_hw.c > @@ -182,7 +182,7 @@ static int overload_shader_present(struct panthor_device *ptdev) > &contents); > if (!ret) > ptdev->gpu_info.shader_present = contents; > - else if (ret == -ENOENT) > + else if (ret == -ENOENT || ret == -EOPNOTSUPP) > return 0; > else > return dev_err_probe(ptdev->base.dev, ret,