[RFC] i915: make the probe asynchronous

From: Feng Tang <feng.tang@intel.com>
To: intel-gfx@lists.freedesktop.org
Cc: Feng Tang <feng.tang@intel.com>,
	Jani Nikula <jani.nikula@intel.com>,
	Daniel Vetter <daniel.vetter@ffwll.ch>,
	alek.du@intel.com
Subject: [RFC] i915: make the probe asynchronous
Date: Mon,  4 Jun 2018 13:32:19 +0800	[thread overview]
Message-ID: <20180604053219.2040-1-feng.tang@intel.com> (raw)

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

Signed-off-by: Feng Tang <feng.tang@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Chris Wilson <chris@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)
-- 
2.14.1

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