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drm/radeon/dp: use usleep_range rather than udelay 

Based on common dp code proposed by Thierry Reding.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2014-01-14 10:37:33 -05:00
parent 2138681bdd
commit ab9f51c09f
1 changed files with 4 additions and 4 deletions
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8
drivers/gpu/drm/radeon/atombios_dp.c
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@ -172,7 +172,7 @@ static int radeon_dp_aux_native_write(struct radeon_connector *radeon_connector,
if ((ack & DP_AUX_NATIVE_REPLY_MASK) == DP_AUX_NATIVE_REPLY_ACK)
return send_bytes;
else if ((ack & DP_AUX_NATIVE_REPLY_MASK) == DP_AUX_NATIVE_REPLY_DEFER)
udelay(400);
usleep_range(400, 500);
else
return -EIO;
}
@ -206,7 +206,7 @@ static int radeon_dp_aux_native_read(struct radeon_connector *radeon_connector,
if ((ack & DP_AUX_NATIVE_REPLY_MASK) == DP_AUX_NATIVE_REPLY_ACK)
return ret;
else if ((ack & DP_AUX_NATIVE_REPLY_MASK) == DP_AUX_NATIVE_REPLY_DEFER)
udelay(400);
usleep_range(400, 500);
else if (ret == 0)
return -EPROTO;
else
@ -295,7 +295,7 @@ int radeon_dp_i2c_aux_ch(struct i2c_adapter *adapter, int mode,
return -EREMOTEIO;
case DP_AUX_NATIVE_REPLY_DEFER:
DRM_DEBUG_KMS("aux_ch native defer\n");
udelay(400);
usleep_range(500, 600);
continue;
default:
DRM_ERROR("aux_ch invalid native reply 0x%02x\n", ack);
@ -312,7 +312,7 @@ int radeon_dp_i2c_aux_ch(struct i2c_adapter *adapter, int mode,
return -EREMOTEIO;
case DP_AUX_I2C_REPLY_DEFER:
DRM_DEBUG_KMS("aux_i2c defer\n");
udelay(400);
usleep_range(400, 500);
break;
default:
DRM_ERROR("aux_i2c invalid reply 0x%02x\n", ack);