ACK: [SRU][Xenial][PATCH 1/1] UBUNTU: SAUCE: drm: check for supported chipset before booting fbdev off the hw

[Brad Figg]

On Tue, Jul 12, 2016 at 03:18:10PM -0700, Kamal Mostafa wrote:
> From: Ben Skeggs <bskeggs at redhat.com>
> 
> BugLink: http://bugs.launchpad.net/bugs/1602340
> 
> Signed-off-by: Ben Skeggs <bskeggs at redhat.com>
> (back-ported from https://github.com/skeggsb/nouveau.git 11fcd1624b0a1c73fe3b2fa15c3cc45816da0470)
> Signed-off-by: Kamal Mostafa <kamal at canonical.com>
> ---
>  drivers/gpu/drm/nouveau/nouveau_drm.c | 11 ++++++++++-
>  1 file changed, 10 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c
> index 1d3ee51..d236fc7 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_drm.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_drm.c
> @@ -308,7 +308,16 @@ static int nouveau_drm_probe(struct pci_dev *pdev,
>  	bool boot = false;
>  	int ret;
>  
> -	/* remove conflicting drivers (vesafb, efifb etc) */
> +	/* We need to check that the chipset is supported before booting
> +	 * fbdev off the hardware, as there's no way to put it back.
> +	 */
> +	ret = nvkm_device_pci_new(pdev, NULL, "error", true, false, 0, &device);
> +	if (ret)
> +		return ret;
> +
> +	nvkm_device_del(&device);
> +
> +	/* Remove conflicting drivers (vesafb, efifb etc). */
>  	aper = alloc_apertures(3);
>  	if (!aper)
>  		return -ENOMEM;
> -- 
> 2.7.4
> 
> 
> -- 
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Positive testing.

-- 
Brad Figg brad.figg at canonical.com http://www.canonical.com