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Date:   Mon, 6 Nov 2023 14:25:24 +0200 (EET)
From:   =?ISO-8859-15?Q?Ilpo_J=E4rvinen?= <ilpo.jarvinen@linux.intel.com>
To:     Mario Limonciello <mario.limonciello@amd.com>
cc:     Karol Herbst <kherbst@redhat.com>, Lyude Paul <lyude@redhat.com>,
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        "open list:DRM DRIVER FOR NVIDIA GEFORCE/QUADRO GPUS" 
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Subject: Re: [PATCH v2 1/9] drm/nouveau: Switch from pci_is_thunderbolt_attached()
 to dev_is_removable()
In-Reply-To: <20231103190758.82911-2-mario.limonciello@amd.com>
Message-ID: <55563d57-60c3-1789-1e7c-5e618fbd6253@linux.intel.com>
References: <20231103190758.82911-1-mario.limonciello@amd.com> <20231103190758.82911-2-mario.limonciello@amd.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Precedence: bulk

On Fri, 3 Nov 2023, Mario Limonciello wrote:

> pci_is_thunderbolt_attached() only works for Intel TBT devices. Switch to
> using dev_is_removable() to be able to detect USB4 devices as well.

Please extend this with more details. I had to lookup the TBT change to 
be able to make any guess why you're doing this (and it's still a guess 
at best).

-- 
 i.


> Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
> ---
>  drivers/gpu/drm/nouveau/nouveau_vga.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/nouveau/nouveau_vga.c b/drivers/gpu/drm/nouveau/nouveau_vga.c
> index f8bf0ec26844..14215b7ca187 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_vga.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_vga.c
> @@ -94,8 +94,8 @@ nouveau_vga_init(struct nouveau_drm *drm)
>  
>  	vga_client_register(pdev, nouveau_vga_set_decode);
>  
> -	/* don't register Thunderbolt eGPU with vga_switcheroo */
> -	if (pci_is_thunderbolt_attached(pdev))
> +	/* don't register USB4/Thunderbolt eGPU with vga_switcheroo */
> +	if (dev_is_removable(&pdev->dev))
>  		return;
>  
>  	vga_switcheroo_register_client(pdev, &nouveau_switcheroo_ops, runtime);
> @@ -118,7 +118,7 @@ nouveau_vga_fini(struct nouveau_drm *drm)
>  
>  	vga_client_unregister(pdev);
>  
> -	if (pci_is_thunderbolt_attached(pdev))
> +	if (dev_is_removable(&pdev->dev))
>  		return;
>  
>  	vga_switcheroo_unregister_client(pdev);
>