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drm/radeon: radeon_dp_i2c_aux_ch() must return 0 on FreeBSD

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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.

MFC after:	3 days
Tested by:	Mikaël Urankar <mikael.urankar@gmail.com>
This commit is contained in:
Jean-Sébastien Pédron 2013-12-08 18:48:07 +00:00
parent 273ef9912d
commit 01a31db4d1
1 changed files with 1 additions and 1 deletions
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2
sys/dev/drm2/radeon/atombios_dp.c
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@ -272,7 +272,7 @@ int radeon_dp_i2c_aux_ch(device_t dev, int mode, u8 write_byte, u8 *read_byte)
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;