[PATCH] drm/i915: increase i2c timeout to 2 jiffies.

[Dave A. <ai...@gm...>]

From: Dave Airlie <ai...@li...>

On radeon at least this seems to solve a lot of our monitor misdetections.

I suppose its possible if we are the end of a jiffy interval and we don't
have 2.2ms left we could timeout early.

Signed-off-by: Dave Airlie <ai...@re...>
---
 drivers/gpu/drm/i915/intel_i2c.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_i2c.c b/drivers/gpu/drm/i915/intel_i2c.c
index 5ee9d4c..20df92f 100644
--- a/drivers/gpu/drm/i915/intel_i2c.c
+++ b/drivers/gpu/drm/i915/intel_i2c.c
@@ -144,7 +144,9 @@ struct intel_i2c_chan *intel_i2c_create(struct drm_device *dev, const u32 reg,
 	chan->algo.getsda = get_data;
 	chan->algo.getscl = get_clock;
 	chan->algo.udelay = 20;
-	chan->algo.timeout = usecs_to_jiffies(2200);
+	/* use 2 jiffies even though vesa mandate 2.2ms,
+	 * as there seems to be an issue with a single jiffy */
+	chan->algo.timeout = 2;
 	chan->algo.data = chan;
 
 	i2c_set_adapdata(&chan->adapter, chan);
-- 
1.6.0.6