Author: dumbbell
Date: Sat Dec 14 00:40:47 2013
New Revision: 259370
URL: http://svnweb.freebsd.org/changeset/base/259370
Log:
MFC r259236:
drm/radeon: radeon_dp_i2c_aux_ch() must return 0 on FreeBSD
The code was unmodified compared to Linux and returned the amount of
received bytes from the i2c bus. This led to non-working i2c bus and
failure to eg. read monitor's EDID, if connected to DisplayPort.
Tested by: Mikaël Urankar <mikael.uran...@gmail.com>
Approved by: re (gjb)
Modified:
releng/10.0/sys/dev/drm2/radeon/atombios_dp.c
Directory Properties:
releng/10.0/ (props changed)
Modified: releng/10.0/sys/dev/drm2/radeon/atombios_dp.c
==============================================================================
--- releng/10.0/sys/dev/drm2/radeon/atombios_dp.c Sat Dec 14 00:36:29
2013 (r259369)
+++ releng/10.0/sys/dev/drm2/radeon/atombios_dp.c Sat Dec 14 00:40:47
2013 (r259370)
@@ -272,7 +272,7 @@ int radeon_dp_i2c_aux_ch(device_t dev, i
case AUX_I2C_REPLY_ACK:
if (mode == MODE_I2C_READ)
*read_byte = reply[0];
- return ret;
+ return (0); /* Return ret on Linux. */
case AUX_I2C_REPLY_NACK:
DRM_DEBUG_KMS("aux_i2c nack\n");
return -EREMOTEIO;
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