linux-kernel - Re: [Nouveau] [PATCH] [resend] nouveau: Disable AGP for SiS 761

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Message-ID: <560BCCF9.6040303@gmail.com>
Date:	Wed, 30 Sep 2015 13:52:25 +0200
From:	Samuel Pitoiset <samuel.pitoiset@...il.com>
To:	Ondrej Zary <linux@...nbow-software.org>,
	nouveau@...ts.freedesktop.org
Cc:	Kernel development list <linux-kernel@...r.kernel.org>,
	dri-devel@...ts.freedesktop.org
Subject: Re: [Nouveau] [PATCH] [resend] nouveau: Disable AGP for SiS 761

This patch has been merged by Ben yesterday.

http://cgit.freedesktop.org/~darktama/nouveau/commit/?id=8c713f90a63ffca10d122af09d439f3409c933ed

Why do you send a new version ? Is the previous patch wrong?

On 09/30/2015 01:48 PM, Ondrej Zary wrote:
> SiS 761 chipset does not support AGP cards but has AGP capability (for
> the onboard video). At least PC Chips A31G board using this chipset has
> an AGP-like AGPro slot that's wired to the PCI bus. Enabling AGP will
> fail (GPU lockup and software fbcon, X11 hangs).
>
> Add support for matching just the host bridge in nvkm_device_agp_quirks
> and add entry for SiS 761 with mode 0 (AGP disabled).
>
> Signed-off-by: Ondrej Zary <linux@...nbow-software.org>
> ---
>   drivers/gpu/drm/nouveau/nvkm/subdev/pci/agp.c |    8 ++++++--
>   1 file changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/pci/agp.c b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/agp.c
> index 814cb51..385a90f 100644
> --- a/drivers/gpu/drm/nouveau/nvkm/subdev/pci/agp.c
> +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/agp.c
> @@ -35,6 +35,8 @@ static const struct nvkm_device_agp_quirk
>   nvkm_device_agp_quirks[] = {
>   	/* VIA Apollo PRO133x / GeForce FX 5600 Ultra - fdo#20341 */
>   	{ PCI_VENDOR_ID_VIA, 0x0691, PCI_VENDOR_ID_NVIDIA, 0x0311, 2 },
> +	/* SiS 761 does not support AGP cards, use PCI mode */
> +	{ PCI_VENDOR_ID_SI, 0x0761, PCI_ANY_ID, PCI_ANY_ID, 0 },
>   	{},
>   };
>   
> @@ -137,8 +139,10 @@ nvkm_agp_ctor(struct nvkm_pci *pci)
>   	while (quirk->hostbridge_vendor) {
>   		if (info.device->vendor == quirk->hostbridge_vendor &&
>   		    info.device->device == quirk->hostbridge_device &&
> -		    pci->pdev->vendor == quirk->chip_vendor &&
> -		    pci->pdev->device == quirk->chip_device) {
> +		    (quirk->chip_vendor == (u16)PCI_ANY_ID ||
> +		    pci->pdev->vendor == quirk->chip_vendor) &&
> +		    (quirk->chip_device == (u16)PCI_ANY_ID ||
> +		    pci->pdev->device == quirk->chip_device)) {
>   			nvkm_info(subdev, "forcing default agp mode to %dX, "
>   					  "use NvAGP=<mode> to override\n",
>   				  quirk->mode);

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