linux-kernel - Re: [PATCH v2 5/6] ALSA: hda: Use pci_is

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Message-ID: <aFLJrHdfrTmoyhin@phenom.ffwll.local>
Date: Wed, 18 Jun 2025 16:14:04 +0200
From: Simona Vetter <simona.vetter@...ll.ch>
To: Mario Limonciello <superm1@...nel.org>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>,
	Alex Deucher <alexander.deucher@....com>,
	Christian König <christian.koenig@....com>,
	David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
	Lukas Wunner <lukas@...ner.de>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Woodhouse <dwmw2@...radead.org>,
	Lu Baolu <baolu.lu@...ux.intel.com>, Joerg Roedel <joro@...tes.org>,
	Will Deacon <will@...nel.org>, Robin Murphy <robin.murphy@....com>,
	Alex Williamson <alex.williamson@...hat.com>,
	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>,
	"open list:DRM DRIVERS" <dri-devel@...ts.freedesktop.org>,
	open list <linux-kernel@...r.kernel.org>,
	"open list:INTEL IOMMU (VT-d)" <iommu@...ts.linux.dev>,
	"open list:PCI SUBSYSTEM" <linux-pci@...r.kernel.org>,
	"open list:VFIO DRIVER" <kvm@...r.kernel.org>,
	"open list:SOUND" <linux-sound@...r.kernel.org>,
	Daniel Dadap <ddadap@...dia.com>,
	Mario Limonciello <mario.limonciello@....com>,
	Bjorn Helgaas <helgaas@...nel.org>
Subject: Re: [PATCH v2 5/6] ALSA: hda: Use pci_is_display()

On Tue, Jun 17, 2025 at 12:59:09PM -0500, Mario Limonciello wrote:
> From: Mario Limonciello <mario.limonciello@....com>
> 
> The inline pci_is_display() helper does the same thing.  Use it.
> 
> Suggested-by: Bjorn Helgaas <helgaas@...nel.org>
> Signed-off-by: Mario Limonciello <mario.limonciello@....com>

I think the helper here is still neat, so for patches 1-5:

Reviewed-by: Simona Vetter <simona.vetter@...ll.ch>

And a-b for the vgaswitcheroo patch for merging through the pci tree or a
dedicated pr to Linus, since I guess that's the simplest way to get that
done.

Cheers, Sima
> ---
>  sound/hda/hdac_i915.c     | 2 +-
>  sound/pci/hda/hda_intel.c | 4 ++--
>  2 files changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/sound/hda/hdac_i915.c b/sound/hda/hdac_i915.c
> index e9425213320ea..44438c799f957 100644
> --- a/sound/hda/hdac_i915.c
> +++ b/sound/hda/hdac_i915.c
> @@ -155,7 +155,7 @@ static int i915_gfx_present(struct pci_dev *hdac_pci)
>  
>  	for_each_pci_dev(display_dev) {
>  		if (display_dev->vendor != PCI_VENDOR_ID_INTEL ||
> -		    (display_dev->class >> 16) != PCI_BASE_CLASS_DISPLAY)
> +		    !pci_is_display(display_dev))
>  			continue;
>  
>  		if (pci_match_id(denylist, display_dev))
> diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
> index e5210ed48ddf1..a165c44b43940 100644
> --- a/sound/pci/hda/hda_intel.c
> +++ b/sound/pci/hda/hda_intel.c
> @@ -1465,7 +1465,7 @@ static struct pci_dev *get_bound_vga(struct pci_dev *pci)
>  				 * the dGPU is the one who is involved in
>  				 * vgaswitcheroo.
>  				 */
> -				if (((p->class >> 16) == PCI_BASE_CLASS_DISPLAY) &&
> +				if (pci_is_display(p) &&
>  				    (atpx_present() || apple_gmux_detect(NULL, NULL)))
>  					return p;
>  				pci_dev_put(p);
> @@ -1477,7 +1477,7 @@ static struct pci_dev *get_bound_vga(struct pci_dev *pci)
>  			p = pci_get_domain_bus_and_slot(pci_domain_nr(pci->bus),
>  							pci->bus->number, 0);
>  			if (p) {
> -				if ((p->class >> 16) == PCI_BASE_CLASS_DISPLAY)
> +				if (pci_is_display(p))
>  					return p;
>  				pci_dev_put(p);
>  			}
> -- 
> 2.43.0
> 

-- 
Simona Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch