From: Alex Deucher <alexdeucher@gmail.com>
Date: Thu, 11 Mar 2010 18:28:14 +0000 (-0500)
Subject: drm/radeon/kms: fix for hw i2c
X-Git-Tag: firefly_0821_release~9833^2~2198^2~83^2~12
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=ae08819c2a4729444676f1bb55e5e28263f6f5a1;p=firefly-linux-kernel-4.4.55.git

drm/radeon/kms: fix for hw i2c

use the i2c pads to drive SDA

Possible fix for fdo bug 26430

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
---

diff --git a/drivers/gpu/drm/radeon/radeon_i2c.c b/drivers/gpu/drm/radeon/radeon_i2c.c
index 4ae50c19589f..5d93418f9fca 100644
--- a/drivers/gpu/drm/radeon/radeon_i2c.c
+++ b/drivers/gpu/drm/radeon/radeon_i2c.c
@@ -291,6 +291,7 @@ static int r100_hw_i2c_xfer(struct i2c_adapter *i2c_adap,
 	prescale = radeon_get_i2c_prescale(rdev);
 
 	reg = ((prescale << RADEON_I2C_PRESCALE_SHIFT) |
+	       RADEON_I2C_DRIVE_EN |
 	       RADEON_I2C_START |
 	       RADEON_I2C_STOP |
 	       RADEON_I2C_GO);