From: Ville Syrjälä <ville.syrj...@linux.intel.com>
Make the code a bit easier to read by providing symbolic names
for the reply_type (ACK vs. NAK). Also clean up some brace stuff
while at it.
Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
---
drivers/gpu/drm/drm_dp_mst_topology.c | 26 +++++++++++++-------------
include/drm/drm_dp_helper.h | 4 ++++
2 files changed, 17 insertions(+), 13 deletions(-)
diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c
b/drivers/gpu/drm/drm_dp_mst_topology.c
index a0652fc166c6..c0f754364cc7 100644
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -567,7 +567,7 @@ static bool drm_dp_sideband_parse_reply(struct
drm_dp_sideband_msg_rx *raw,
msg->reply_type = (raw->msg[0] & 0x80) >> 7;
msg->req_type = (raw->msg[0] & 0x7f);
- if (msg->reply_type) {
+ if (msg->reply_type == DP_REPLY_NAK) {
memcpy(msg->u.nak.guid, &raw->msg[1], 16);
msg->u.nak.reason = raw->msg[17];
msg->u.nak.nak_data = raw->msg[18];
@@ -1614,9 +1614,9 @@ static void drm_dp_send_link_address(struct
drm_dp_mst_topology_mgr *mgr,
if (ret > 0) {
int i;
- if (txmsg->reply.reply_type == 1)
+ if (txmsg->reply.reply_type == DP_REPLY_NAK) {
DRM_DEBUG_KMS("link address nak received\n");
- else {
+ } else {
DRM_DEBUG_KMS("link address reply: %d\n",
txmsg->reply.u.link_addr.nports);
for (i = 0; i < txmsg->reply.u.link_addr.nports; i++) {
DRM_DEBUG_KMS("port %d: input %d, pdt: %d, pn:
%d, dpcd_rev: %02x, mcs: %d, ddps: %d, ldps %d, sdp %d/%d\n", i,
@@ -1665,9 +1665,9 @@ static int drm_dp_send_enum_path_resources(struct
drm_dp_mst_topology_mgr *mgr,
ret = drm_dp_mst_wait_tx_reply(mstb, txmsg);
if (ret > 0) {
- if (txmsg->reply.reply_type == 1)
+ if (txmsg->reply.reply_type == DP_REPLY_NAK) {
DRM_DEBUG_KMS("enum path resources nak received\n");
- else {
+ } else {
if (port->port_num !=
txmsg->reply.u.path_resources.port_number)
DRM_ERROR("got incorrect port in response\n");
DRM_DEBUG_KMS("enum path resources %d: %d %d\n",
txmsg->reply.u.path_resources.port_number,
txmsg->reply.u.path_resources.full_payload_bw_number,
@@ -1755,9 +1755,9 @@ static int drm_dp_payload_send_msg(struct
drm_dp_mst_topology_mgr *mgr,
ret = drm_dp_mst_wait_tx_reply(mstb, txmsg);
if (ret > 0) {
- if (txmsg->reply.reply_type == 1) {
+ if (txmsg->reply.reply_type == DP_REPLY_NAK)
ret = -EINVAL;
- } else
+ else
ret = 0;
}
kfree(txmsg);
@@ -1789,7 +1789,7 @@ int drm_dp_send_power_updown_phy(struct
drm_dp_mst_topology_mgr *mgr,
ret = drm_dp_mst_wait_tx_reply(port->parent, txmsg);
if (ret > 0) {
- if (txmsg->reply.reply_type == 1)
+ if (txmsg->reply.reply_type == DP_REPLY_NAK)
ret = -EINVAL;
else
ret = 0;
@@ -2026,9 +2026,9 @@ static int drm_dp_send_dpcd_write(struct
drm_dp_mst_topology_mgr *mgr,
ret = drm_dp_mst_wait_tx_reply(mstb, txmsg);
if (ret > 0) {
- if (txmsg->reply.reply_type == 1) {
+ if (txmsg->reply.reply_type == DP_REPLY_NAK)
ret = -EINVAL;
- } else
+ else
ret = 0;
}
kfree(txmsg);
@@ -2041,7 +2041,7 @@ static int drm_dp_encode_up_ack_reply(struct
drm_dp_sideband_msg_tx *msg, u8 req
{
struct drm_dp_sideband_msg_reply_body reply;
- reply.reply_type = 0;
+ reply.reply_type = DP_REPLY_ACK;
reply.req_type = req_type;
drm_dp_encode_sideband_reply(&reply, msg);
return 0;
@@ -2348,7 +2348,7 @@ static int drm_dp_mst_handle_down_rep(struct
drm_dp_mst_topology_mgr *mgr)
}
drm_dp_sideband_parse_reply(&mgr->down_rep_recv, &txmsg->reply);
- if (txmsg->reply.reply_type == 1) {
+ if (txmsg->reply.reply_type == DP_REPLY_NAK) {
DRM_DEBUG_KMS("Got NAK reply: req 0x%02x, reason
0x%02x, nak data 0x%02x\n", txmsg->reply.req_type, txmsg->reply.u.nak.reason,
txmsg->reply.u.nak.nak_data);
}
@@ -3306,7 +3306,7 @@ static int drm_dp_mst_i2c_xfer(struct i2c_adapter
*adapter, struct i2c_msg *msgs
ret = drm_dp_mst_wait_tx_reply(mstb, txmsg);
if (ret > 0) {
- if (txmsg->reply.reply_type == 1) { /* got a NAK back */
+ if (txmsg->reply.reply_type == DP_REPLY_NAK) {
ret = -EREMOTEIO;
goto out;
}
diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
index 2a3843f248cf..2a0fd9d7066e 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -905,6 +905,10 @@
#define DP_AUX_HDCP_KSV_FIFO 0x6802C
#define DP_AUX_HDCP_AINFO 0x6803B
+/* DP 1.2 MST sideband reply types */
+#define DP_REPLY_ACK 0x00
+#define DP_REPLY_NAK 0x01
+
/* DP 1.2 Sideband message defines */
/* peer device type - DP 1.2a Table 2-92 */
#define DP_PEER_DEVICE_NONE 0x0
--
2.16.4
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