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Commit 90489557 authored Jan 28, 2012 by Jean Delvare Committed by Dave Airlie Feb 03, 2012

drm/radeon/kms: Use the standard VESA timeout for DDC channels



The VESA specification suggests a 2.2 ms timeout on DDC channels.
Use exactly that (as the i915 driver does) instead of hard-coding a
jiffy count.

Signed-off-by: Jean Delvare <jdelvare@suse.de>
Reviewed-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

parent 1849ecb2

drivers/gpu/drm/radeon/radeon_i2c.c

+1 −3

Original line number	Diff line number	Diff line
		@@ -926,9 +926,7 @@ struct radeon_i2c_chan radeon_i2c_create(struct drm_device dev,
		i2c->algo.bit.getsda = get_data;
		i2c->algo.bit.getscl = get_clock;
		i2c->algo.bit.udelay = 10;
		/* vesa says 2.2 ms is enough, 1 jiffy doesn't seem to always
		* make this, 2 jiffies is a lot more reliable */
		i2c->algo.bit.timeout = 2;
		i2c->algo.bit.timeout = usecs_to_jiffies(2200); /* from VESA */
		i2c->algo.bit.data = i2c;
		ret = i2c_bit_add_bus(&i2c->adapter);
		if (ret) {