drm/dp: Use AUX constants from specification
The current values seem to be defined in a format that's specific to the
i915, gma500 and radeon drivers. To make this more generally useful, use
the values as defined in the specification.
While at it, prefix the constants with DP_ for improved namespacing.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 7c54f62..36f13c5 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -542,7 +542,7 @@
return -E2BIG;
intel_dp_check_edp(intel_dp);
- msg[0] = AUX_NATIVE_WRITE << 4;
+ msg[0] = DP_AUX_NATIVE_WRITE << 4;
msg[1] = address >> 8;
msg[2] = address & 0xff;
msg[3] = send_bytes - 1;
@@ -552,9 +552,10 @@
ret = intel_dp_aux_ch(intel_dp, msg, msg_bytes, &ack, 1);
if (ret < 0)
return ret;
- if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_ACK)
+ ack >>= 4;
+ if ((ack & DP_AUX_NATIVE_REPLY_MASK) == DP_AUX_NATIVE_REPLY_ACK)
break;
- else if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_DEFER)
+ else if ((ack & DP_AUX_NATIVE_REPLY_MASK) == DP_AUX_NATIVE_REPLY_DEFER)
udelay(100);
else
return -EIO;
@@ -586,7 +587,7 @@
return -E2BIG;
intel_dp_check_edp(intel_dp);
- msg[0] = AUX_NATIVE_READ << 4;
+ msg[0] = DP_AUX_NATIVE_READ << 4;
msg[1] = address >> 8;
msg[2] = address & 0xff;
msg[3] = recv_bytes - 1;
@@ -601,12 +602,12 @@
return -EPROTO;
if (ret < 0)
return ret;
- ack = reply[0];
- if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_ACK) {
+ ack = reply[0] >> 4;
+ if ((ack & DP_AUX_NATIVE_REPLY_MASK) == DP_AUX_NATIVE_REPLY_ACK) {
memcpy(recv, reply + 1, ret - 1);
return ret - 1;
}
- else if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_DEFER)
+ else if ((ack & DP_AUX_NATIVE_REPLY_MASK) == DP_AUX_NATIVE_REPLY_DEFER)
udelay(100);
else
return -EIO;
@@ -633,12 +634,12 @@
intel_dp_check_edp(intel_dp);
/* Set up the command byte */
if (mode & MODE_I2C_READ)
- msg[0] = AUX_I2C_READ << 4;
+ msg[0] = DP_AUX_I2C_READ << 4;
else
- msg[0] = AUX_I2C_WRITE << 4;
+ msg[0] = DP_AUX_I2C_WRITE << 4;
if (!(mode & MODE_I2C_STOP))
- msg[0] |= AUX_I2C_MOT << 4;
+ msg[0] |= DP_AUX_I2C_MOT << 4;
msg[1] = address >> 8;
msg[2] = address;
@@ -675,17 +676,17 @@
goto out;
}
- switch (reply[0] & AUX_NATIVE_REPLY_MASK) {
- case AUX_NATIVE_REPLY_ACK:
+ switch ((reply[0] >> 4) & DP_AUX_NATIVE_REPLY_MASK) {
+ case DP_AUX_NATIVE_REPLY_ACK:
/* I2C-over-AUX Reply field is only valid
* when paired with AUX ACK.
*/
break;
- case AUX_NATIVE_REPLY_NACK:
+ case DP_AUX_NATIVE_REPLY_NACK:
DRM_DEBUG_KMS("aux_ch native nack\n");
ret = -EREMOTEIO;
goto out;
- case AUX_NATIVE_REPLY_DEFER:
+ case DP_AUX_NATIVE_REPLY_DEFER:
/*
* For now, just give more slack to branch devices. We
* could check the DPCD for I2C bit rate capabilities,
@@ -706,18 +707,18 @@
goto out;
}
- switch (reply[0] & AUX_I2C_REPLY_MASK) {
- case AUX_I2C_REPLY_ACK:
+ switch ((reply[0] >> 4) & DP_AUX_I2C_REPLY_MASK) {
+ case DP_AUX_I2C_REPLY_ACK:
if (mode == MODE_I2C_READ) {
*read_byte = reply[1];
}
ret = reply_bytes - 1;
goto out;
- case AUX_I2C_REPLY_NACK:
+ case DP_AUX_I2C_REPLY_NACK:
DRM_DEBUG_KMS("aux_i2c nack\n");
ret = -EREMOTEIO;
goto out;
- case AUX_I2C_REPLY_DEFER:
+ case DP_AUX_I2C_REPLY_DEFER:
DRM_DEBUG_KMS("aux_i2c defer\n");
udelay(100);
break;