From nobody Thu Oct 9 07:17:37 2025 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 CDBFB1B5EB5; Fri, 20 Jun 2025 02:50:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750387802; cv=none; b=Wqk4px1bY3E26qzLHZKSNvjzAitX9N08GZPQbrDvqfhm6+uEV8IaihM2nRjmdr3/pZizqfibY2x03YyT+C5M0K5i1qNskg5waOHngZOzL5tW2AOJDKvzmlgu/3YpAjrcitfgcS3imyfPqk2cNIRsSTR1irgxHlB8fnbpzWr/f5o= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750387802; c=relaxed/simple; bh=dwUS0NNQBo6ioFvBv9MvL8ShjmESObZeByXZvWYMJKk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=MKdDK3tdSMb46GtuYsD8h8eE9dk8Je5XD216ovp9Go0lAkGs0m605npjrCJjBnkojca/x/XegwUj6CMhNVR7cmBFGjhqXBihI42vrMzxkSlq5Is+x6El1Ltk2qk96cu4LL5x9C9ijqD4p9w1sLLOcqzscLcuWrhY07XkXx2ZOLc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=S5eMEaVx; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="S5eMEaVx" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 171DFC4CEF0; Fri, 20 Jun 2025 02:50:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1750387802; bh=dwUS0NNQBo6ioFvBv9MvL8ShjmESObZeByXZvWYMJKk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=S5eMEaVxgF6txdm4vtGRsHjfa187clMuzbb7RyDkJvhG9ytlzIHxdMPQMDvaCRMyF k3kbmtGJIx/Dw3x6wNYXGQtjOVfa0MJEfjJfKGYLMXpO9sevsDhCzLmWcN5VR09BO7 Hw5Bq/N+1TUPCaohwxvPbT+cB7D7YvWHCgOnQ1IawQt4WkoqfyLbOnKG2gtRMtr4O1 1xSDfo4Zqyges6lQDtyHHvqhVJI3mDnZbOmZ+KNMWWjvHmagR3l2sggLK7VOD9RJVZ wlA+Ed4ApaqraFxNxpt7ldfKtefWB02TbNb5lh1ldFHWlsoJpZzQm4WYzVXuALKKwp VmaGadYzYXC1g== From: Mario Limonciello To: Bjorn Helgaas Cc: Alex Deucher , =?UTF-8?q?Christian=20K=C3=B6nig?= , David Airlie , Simona Vetter , Lukas Wunner , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Woodhouse , Lu Baolu , Joerg Roedel , Will Deacon , Robin Murphy , Alex Williamson , Jaroslav Kysela , Takashi Iwai , dri-devel@lists.freedesktop.org (open list:DRM DRIVERS), linux-kernel@vger.kernel.org (open list), iommu@lists.linux.dev (open list:INTEL IOMMU (VT-d)), linux-pci@vger.kernel.org (open list:PCI SUBSYSTEM), kvm@vger.kernel.org (open list:VFIO DRIVER), linux-sound@vger.kernel.org (open list:SOUND), Daniel Dadap , Mario Limonciello , Simona Vetter Subject: [PATCH v3 1/7] PCI: Add helper for checking if a PCI device is a display controller Date: Thu, 19 Jun 2025 21:49:37 -0500 Message-ID: <20250620024943.3415685-2-superm1@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250620024943.3415685-1-superm1@kernel.org> References: <20250620024943.3415685-1-superm1@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Mario Limonciello Several places in the kernel do class shifting to match whether a PCI device is display class. Introduce a helper for those places to use. Reviewed-by: Daniel Dadap Reviewed-by: Simona Vetter Signed-off-by: Mario Limonciello --- include/linux/pci.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/include/linux/pci.h b/include/linux/pci.h index 05e68f35f3923..e77754e43c629 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -744,6 +744,21 @@ static inline bool pci_is_vga(struct pci_dev *pdev) return false; } =20 +/** + * pci_is_display - Check if a PCI device is a display controller + * @pdev: Pointer to the PCI device structure + * + * This function determines whether the given PCI device corresponds + * to a display controller. Display controllers are typically used + * for graphical output and are identified based on their class code. + * + * Return: true if the PCI device is a display controller, false otherwise. + */ +static inline bool pci_is_display(struct pci_dev *pdev) +{ + return (pdev->class >> 16) =3D=3D PCI_BASE_CLASS_DISPLAY; +} + #define for_each_pci_bridge(dev, bus) \ list_for_each_entry(dev, &bus->devices, bus_list) \ if (!pci_is_bridge(dev)) {} else --=20 2.43.0