diff options
Diffstat (limited to 'drivers/gpu/drm/i915')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_dp.c | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 3f8d7b449e7..818fe34f2b5 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -209,15 +209,19 @@ intel_dp_aux_ch(struct intel_output *intel_output, if ((status & DP_AUX_CH_CTL_DONE) == 0) { printk(KERN_ERR "dp_aux_ch not done status 0x%08x\n", status); - return -1; + return -EBUSY; } /* Check for timeout or receive error. * Timeouts occur when the sink is not connected */ - if (status & (DP_AUX_CH_CTL_TIME_OUT_ERROR | DP_AUX_CH_CTL_RECEIVE_ERROR)) { - printk(KERN_ERR "dp_aux_ch error status 0x%08x\n", status); - return -1; + if (status & DP_AUX_CH_CTL_RECEIVE_ERROR) { + printk(KERN_ERR "dp_aux_ch receive error status 0x%08x\n", status); + return -EIO; + } + if (status & DP_AUX_CH_CTL_TIME_OUT_ERROR) { + printk(KERN_ERR "dp_aux_ch timeout status 0x%08x\n", status); + return -ETIMEDOUT; } /* Unload any bytes sent back from the other side */ @@ -263,7 +267,7 @@ intel_dp_aux_native_write(struct intel_output *intel_output, else if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_DEFER) udelay(100); else - return -1; + return -EIO; } return send_bytes; } @@ -299,7 +303,9 @@ intel_dp_aux_native_read(struct intel_output *intel_output, for (;;) { ret = intel_dp_aux_ch(intel_output, msg, msg_bytes, reply, reply_bytes); - if (ret <= 0) + if (ret == 0) + return -EPROTO; + if (ret < 0) return ret; ack = reply[0]; if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_ACK) { @@ -309,7 +315,7 @@ intel_dp_aux_native_read(struct intel_output *intel_output, else if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_DEFER) udelay(100); else - return -1; + return -EIO; } } |