From: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Tue, 14 Feb 2012 21:37:25 +0000 (+0100)
Subject: drm/i915: reenable gmbus on gen3+ again
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=c3dfefa0a6d235bd465309e12f4c56ea16e71111;p=linux-beck.git

drm/i915: reenable gmbus on gen3+ again

With the rework to merge the bit-banging fallback into the gmbus
i2c adapter we've gotten rid of the deadlock possibility that
originally lead to the disabling of this code.

This reverts the revert

commit 826c7e4147f902737b281e8a5a7d7aa33fd63316
Author: Jean Delvare <khali@linux-fr.org>
Date:   Sat Jun 4 19:34:56 2011 +0000

    Revert "drm/i915: Enable GMBUS for post-gen2 chipsets"

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=35572
Reviewed-by: Eugeni Dodonov <eugeni.dodonov@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---

diff --git a/drivers/gpu/drm/i915/intel_i2c.c b/drivers/gpu/drm/i915/intel_i2c.c
index 8fdc95700218..601c86e664af 100644
--- a/drivers/gpu/drm/i915/intel_i2c.c
+++ b/drivers/gpu/drm/i915/intel_i2c.c
@@ -390,7 +390,7 @@ int intel_setup_gmbus(struct drm_device *dev)
 		bus->has_gpio = intel_gpio_setup(bus, i);
 
 		/* XXX force bit banging until GMBUS is fully debugged */
-		if (bus->has_gpio)
+		if (bus->has_gpio && IS_GEN2(dev))
 			bus->force_bit = true;
 	}