[Intel-gfx] [RFC] i915: make the probe asynchronous

[Jani Nikula]

On Mon, 04 Jun 2018, Feng Tang <feng.tang at intel.com> wrote:
> i915 driver's probe is one of the longest of pci devices, which takes
> about hundreds of microseconds or more, make the probe async will help
> much on the kernel boot time, as different driver's probe can go async.
>
> This have been limited verified on several platforms of mine, don't
> know if it will have other side effects and drawbacks, so I would
> throw it out for reviews and comments, thanks

See the previous discussion [1].

BR,
Jani.

[1] http://mid.mail-archive.com/20180323083048.13327-1-chris@chris-wilson.co.uk

>
> Signed-off-by: Feng Tang <feng.tang at intel.com>
> Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
> Cc: Jani Nikula <jani.nikula at intel.com>
> Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
> Cc: Chris Wilson <chris at chris-wilson.co.uk>
> ---
>  drivers/gpu/drm/i915/i915_pci.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
> index 062e91b39085..5db3080101be 100644
> --- a/drivers/gpu/drm/i915/i915_pci.c
> +++ b/drivers/gpu/drm/i915/i915_pci.c
> @@ -725,6 +725,7 @@ static struct pci_driver i915_pci_driver = {
>  	.probe = i915_pci_probe,
>  	.remove = i915_pci_remove,
>  	.driver.pm = &i915_pm_ops,
> +	.driver.probe_type = PROBE_PREFER_ASYNCHRONOUS,
>  };
>  
>  static int __init i915_init(void)

-- 
Jani Nikula, Intel Open Source Graphics Center