#include <drm/drm_atomic_helper.h>
#include <drm/drm_dp_mst_helper.h>
#include <drm/drm_drv.h>
-#include <drm/drm_fixed.h>
#include <drm/drm_print.h>
#include <drm/drm_probe_helper.h>
#include "drm_crtc_helper_internal.h"
+#include "drm_dp_mst_topology_internal.h"
/**
* DOC: dp mst helper
*/
static bool dump_dp_payload_table(struct drm_dp_mst_topology_mgr *mgr,
char *buf);
-static int test_calc_pbn_mode(void);
static void drm_dp_mst_topology_put_port(struct drm_dp_mst_port *port);
static void drm_dp_mst_unregister_i2c_bus(struct drm_dp_aux *aux);
static void drm_dp_mst_kick_tx(struct drm_dp_mst_topology_mgr *mgr);
+#define DBG_PREFIX "[dp_mst]"
+
#define DP_STR(x) [DP_ ## x] = #x
static const char *drm_dp_mst_req_type_str(u8 req_type)
}
#undef DP_STR
+#define DP_STR(x) [DRM_DP_SIDEBAND_TX_ ## x] = #x
+
+static const char *drm_dp_mst_sideband_tx_state_str(int state)
+{
+ static const char * const sideband_reason_str[] = {
+ DP_STR(QUEUED),
+ DP_STR(START_SEND),
+ DP_STR(SENT),
+ DP_STR(RX),
+ DP_STR(TIMEOUT),
+ };
+
+ if (state >= ARRAY_SIZE(sideband_reason_str) ||
+ !sideband_reason_str[state])
+ return "unknown";
+
+ return sideband_reason_str[state];
+}
+
+static int
+drm_dp_mst_rad_to_str(const u8 rad[8], u8 lct, char *out, size_t len)
+{
+ int i;
+ u8 unpacked_rad[16];
+
+ for (i = 0; i < lct; i++) {
+ if (i % 2)
+ unpacked_rad[i] = rad[i / 2] >> 4;
+ else
+ unpacked_rad[i] = rad[i / 2] & BIT_MASK(4);
+ }
+
+ /* TODO: Eventually add something to printk so we can format the rad
+ * like this: 1.2.3
+ */
+ return snprintf(out, len, "%*phC", lct, unpacked_rad);
+}
/* sideband msg handling */
static u8 drm_dp_msg_header_crc4(const uint8_t *data, size_t num_nibbles)
return true;
}
-static void drm_dp_encode_sideband_req(struct drm_dp_sideband_msg_req_body *req,
- struct drm_dp_sideband_msg_tx *raw)
+void
+drm_dp_encode_sideband_req(const struct drm_dp_sideband_msg_req_body *req,
+ struct drm_dp_sideband_msg_tx *raw)
{
int idx = 0;
int i;
switch (req->req_type) {
case DP_ENUM_PATH_RESOURCES:
+ case DP_POWER_DOWN_PHY:
+ case DP_POWER_UP_PHY:
buf[idx] = (req->u.port_num.port_number & 0xf) << 4;
idx++;
break;
memcpy(&buf[idx], req->u.i2c_write.bytes, req->u.i2c_write.num_bytes);
idx += req->u.i2c_write.num_bytes;
break;
+ }
+ raw->cur_len = idx;
+}
+EXPORT_SYMBOL_FOR_TESTS_ONLY(drm_dp_encode_sideband_req);
+
+/* Decode a sideband request we've encoded, mainly used for debugging */
+int
+drm_dp_decode_sideband_req(const struct drm_dp_sideband_msg_tx *raw,
+ struct drm_dp_sideband_msg_req_body *req)
+{
+ const u8 *buf = raw->msg;
+ int i, idx = 0;
+ req->req_type = buf[idx++] & 0x7f;
+ switch (req->req_type) {
+ case DP_ENUM_PATH_RESOURCES:
case DP_POWER_DOWN_PHY:
case DP_POWER_UP_PHY:
- buf[idx] = (req->u.port_num.port_number & 0xf) << 4;
- idx++;
+ req->u.port_num.port_number = (buf[idx] >> 4) & 0xf;
+ break;
+ case DP_ALLOCATE_PAYLOAD:
+ {
+ struct drm_dp_allocate_payload *a =
+ &req->u.allocate_payload;
+
+ a->number_sdp_streams = buf[idx] & 0xf;
+ a->port_number = (buf[idx] >> 4) & 0xf;
+
+ WARN_ON(buf[++idx] & 0x80);
+ a->vcpi = buf[idx] & 0x7f;
+
+ a->pbn = buf[++idx] << 8;
+ a->pbn |= buf[++idx];
+
+ idx++;
+ for (i = 0; i < a->number_sdp_streams; i++) {
+ a->sdp_stream_sink[i] =
+ (buf[idx + (i / 2)] >> ((i % 2) ? 0 : 4)) & 0xf;
+ }
+ }
+ break;
+ case DP_QUERY_PAYLOAD:
+ req->u.query_payload.port_number = (buf[idx] >> 4) & 0xf;
+ WARN_ON(buf[++idx] & 0x80);
+ req->u.query_payload.vcpi = buf[idx] & 0x7f;
+ break;
+ case DP_REMOTE_DPCD_READ:
+ {
+ struct drm_dp_remote_dpcd_read *r = &req->u.dpcd_read;
+
+ r->port_number = (buf[idx] >> 4) & 0xf;
+
+ r->dpcd_address = (buf[idx] << 16) & 0xf0000;
+ r->dpcd_address |= (buf[++idx] << 8) & 0xff00;
+ r->dpcd_address |= buf[++idx] & 0xff;
+
+ r->num_bytes = buf[++idx];
+ }
+ break;
+ case DP_REMOTE_DPCD_WRITE:
+ {
+ struct drm_dp_remote_dpcd_write *w =
+ &req->u.dpcd_write;
+
+ w->port_number = (buf[idx] >> 4) & 0xf;
+
+ w->dpcd_address = (buf[idx] << 16) & 0xf0000;
+ w->dpcd_address |= (buf[++idx] << 8) & 0xff00;
+ w->dpcd_address |= buf[++idx] & 0xff;
+
+ w->num_bytes = buf[++idx];
+
+ w->bytes = kmemdup(&buf[++idx], w->num_bytes,
+ GFP_KERNEL);
+ if (!w->bytes)
+ return -ENOMEM;
+ }
+ break;
+ case DP_REMOTE_I2C_READ:
+ {
+ struct drm_dp_remote_i2c_read *r = &req->u.i2c_read;
+ struct drm_dp_remote_i2c_read_tx *tx;
+ bool failed = false;
+
+ r->num_transactions = buf[idx] & 0x3;
+ r->port_number = (buf[idx] >> 4) & 0xf;
+ for (i = 0; i < r->num_transactions; i++) {
+ tx = &r->transactions[i];
+
+ tx->i2c_dev_id = buf[++idx] & 0x7f;
+ tx->num_bytes = buf[++idx];
+ tx->bytes = kmemdup(&buf[++idx],
+ tx->num_bytes,
+ GFP_KERNEL);
+ if (!tx->bytes) {
+ failed = true;
+ break;
+ }
+ idx += tx->num_bytes;
+ tx->no_stop_bit = (buf[idx] >> 5) & 0x1;
+ tx->i2c_transaction_delay = buf[idx] & 0xf;
+ }
+
+ if (failed) {
+ for (i = 0; i < r->num_transactions; i++)
+ kfree(tx->bytes);
+ return -ENOMEM;
+ }
+
+ r->read_i2c_device_id = buf[++idx] & 0x7f;
+ r->num_bytes_read = buf[++idx];
+ }
+ break;
+ case DP_REMOTE_I2C_WRITE:
+ {
+ struct drm_dp_remote_i2c_write *w = &req->u.i2c_write;
+
+ w->port_number = (buf[idx] >> 4) & 0xf;
+ w->write_i2c_device_id = buf[++idx] & 0x7f;
+ w->num_bytes = buf[++idx];
+ w->bytes = kmemdup(&buf[++idx], w->num_bytes,
+ GFP_KERNEL);
+ if (!w->bytes)
+ return -ENOMEM;
+ }
+ break;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_FOR_TESTS_ONLY(drm_dp_decode_sideband_req);
+
+void
+drm_dp_dump_sideband_msg_req_body(const struct drm_dp_sideband_msg_req_body *req,
+ int indent, struct drm_printer *printer)
+{
+ int i;
+
+#define P(f, ...) drm_printf_indent(printer, indent, f, ##__VA_ARGS__)
+ if (req->req_type == DP_LINK_ADDRESS) {
+ /* No contents to print */
+ P("type=%s\n", drm_dp_mst_req_type_str(req->req_type));
+ return;
+ }
+
+ P("type=%s contents:\n", drm_dp_mst_req_type_str(req->req_type));
+ indent++;
+
+ switch (req->req_type) {
+ case DP_ENUM_PATH_RESOURCES:
+ case DP_POWER_DOWN_PHY:
+ case DP_POWER_UP_PHY:
+ P("port=%d\n", req->u.port_num.port_number);
+ break;
+ case DP_ALLOCATE_PAYLOAD:
+ P("port=%d vcpi=%d pbn=%d sdp_streams=%d %*ph\n",
+ req->u.allocate_payload.port_number,
+ req->u.allocate_payload.vcpi, req->u.allocate_payload.pbn,
+ req->u.allocate_payload.number_sdp_streams,
+ req->u.allocate_payload.number_sdp_streams,
+ req->u.allocate_payload.sdp_stream_sink);
+ break;
+ case DP_QUERY_PAYLOAD:
+ P("port=%d vcpi=%d\n",
+ req->u.query_payload.port_number,
+ req->u.query_payload.vcpi);
+ break;
+ case DP_REMOTE_DPCD_READ:
+ P("port=%d dpcd_addr=%05x len=%d\n",
+ req->u.dpcd_read.port_number, req->u.dpcd_read.dpcd_address,
+ req->u.dpcd_read.num_bytes);
+ break;
+ case DP_REMOTE_DPCD_WRITE:
+ P("port=%d addr=%05x len=%d: %*ph\n",
+ req->u.dpcd_write.port_number,
+ req->u.dpcd_write.dpcd_address,
+ req->u.dpcd_write.num_bytes, req->u.dpcd_write.num_bytes,
+ req->u.dpcd_write.bytes);
+ break;
+ case DP_REMOTE_I2C_READ:
+ P("port=%d num_tx=%d id=%d size=%d:\n",
+ req->u.i2c_read.port_number,
+ req->u.i2c_read.num_transactions,
+ req->u.i2c_read.read_i2c_device_id,
+ req->u.i2c_read.num_bytes_read);
+
+ indent++;
+ for (i = 0; i < req->u.i2c_read.num_transactions; i++) {
+ const struct drm_dp_remote_i2c_read_tx *rtx =
+ &req->u.i2c_read.transactions[i];
+
+ P("%d: id=%03d size=%03d no_stop_bit=%d tx_delay=%03d: %*ph\n",
+ i, rtx->i2c_dev_id, rtx->num_bytes,
+ rtx->no_stop_bit, rtx->i2c_transaction_delay,
+ rtx->num_bytes, rtx->bytes);
+ }
+ break;
+ case DP_REMOTE_I2C_WRITE:
+ P("port=%d id=%d size=%d: %*ph\n",
+ req->u.i2c_write.port_number,
+ req->u.i2c_write.write_i2c_device_id,
+ req->u.i2c_write.num_bytes, req->u.i2c_write.num_bytes,
+ req->u.i2c_write.bytes);
+ break;
+ default:
+ P("???\n");
+ break;
+ }
+#undef P
+}
+EXPORT_SYMBOL_FOR_TESTS_ONLY(drm_dp_dump_sideband_msg_req_body);
+
+static inline void
+drm_dp_mst_dump_sideband_msg_tx(struct drm_printer *p,
+ const struct drm_dp_sideband_msg_tx *txmsg)
+{
+ struct drm_dp_sideband_msg_req_body req;
+ char buf[64];
+ int ret;
+ int i;
+
+ drm_dp_mst_rad_to_str(txmsg->dst->rad, txmsg->dst->lct, buf,
+ sizeof(buf));
+ drm_printf(p, "txmsg cur_offset=%x cur_len=%x seqno=%x state=%s path_msg=%d dst=%s\n",
+ txmsg->cur_offset, txmsg->cur_len, txmsg->seqno,
+ drm_dp_mst_sideband_tx_state_str(txmsg->state),
+ txmsg->path_msg, buf);
+
+ ret = drm_dp_decode_sideband_req(txmsg, &req);
+ if (ret) {
+ drm_printf(p, "<failed to decode sideband req: %d>\n", ret);
+ return;
+ }
+ drm_dp_dump_sideband_msg_req_body(&req, 1, p);
+
+ switch (req.req_type) {
+ case DP_REMOTE_DPCD_WRITE:
+ kfree(req.u.dpcd_write.bytes);
+ break;
+ case DP_REMOTE_I2C_READ:
+ for (i = 0; i < req.u.i2c_read.num_transactions; i++)
+ kfree(req.u.i2c_read.transactions[i].bytes);
+ break;
+ case DP_REMOTE_I2C_WRITE:
+ kfree(req.u.i2c_write.bytes);
break;
}
- raw->cur_len = idx;
}
static void drm_dp_crc_sideband_chunk_req(u8 *msg, u8 len)
clear_bit(vcpi - 1, &mgr->vcpi_mask);
for (i = 0; i < mgr->max_payloads; i++) {
- if (mgr->proposed_vcpis[i])
- if (mgr->proposed_vcpis[i]->vcpi == vcpi) {
- mgr->proposed_vcpis[i] = NULL;
- clear_bit(i + 1, &mgr->payload_mask);
- }
+ if (mgr->proposed_vcpis[i] &&
+ mgr->proposed_vcpis[i]->vcpi == vcpi) {
+ mgr->proposed_vcpis[i] = NULL;
+ clear_bit(i + 1, &mgr->payload_mask);
+ }
}
mutex_unlock(&mgr->payload_lock);
}
}
}
out:
+ if (unlikely(ret == -EIO) && drm_debug_enabled(DRM_UT_DP)) {
+ struct drm_printer p = drm_debug_printer(DBG_PREFIX);
+
+ drm_dp_mst_dump_sideband_msg_tx(&p, txmsg);
+ }
mutex_unlock(&mgr->qlock);
return ret;
}
EXPORT_SYMBOL(drm_dp_mst_connector_early_unregister);
-static void drm_dp_add_port(struct drm_dp_mst_branch *mstb,
- struct drm_device *dev,
- struct drm_dp_link_addr_reply_port *port_msg)
+static void
+drm_dp_mst_handle_link_address_port(struct drm_dp_mst_branch *mstb,
+ struct drm_device *dev,
+ struct drm_dp_link_addr_reply_port *port_msg)
{
struct drm_dp_mst_port *port;
bool ret;
drm_dp_mst_topology_put_port(port);
}
-static void drm_dp_update_port(struct drm_dp_mst_branch *mstb,
- struct drm_dp_connection_status_notify *conn_stat)
+static void
+drm_dp_mst_handle_conn_stat(struct drm_dp_mst_branch *mstb,
+ struct drm_dp_connection_status_notify *conn_stat)
{
struct drm_dp_mst_port *port;
int old_pdt;
static struct drm_dp_mst_branch *get_mst_branch_device_by_guid_helper(
struct drm_dp_mst_branch *mstb,
- uint8_t *guid)
+ const uint8_t *guid)
{
struct drm_dp_mst_branch *found_mstb;
struct drm_dp_mst_port *port;
static struct drm_dp_mst_branch *
drm_dp_get_mst_branch_device_by_guid(struct drm_dp_mst_topology_mgr *mgr,
- uint8_t *guid)
+ const uint8_t *guid)
{
struct drm_dp_mst_branch *mstb;
int ret;
idx += tosend + 1;
ret = drm_dp_send_sideband_msg(mgr, up, chunk, idx);
- if (ret) {
- DRM_DEBUG_KMS("sideband msg failed to send\n");
+ if (unlikely(ret) && drm_debug_enabled(DRM_UT_DP)) {
+ struct drm_printer p = drm_debug_printer(DBG_PREFIX);
+
+ drm_printf(&p, "sideband msg failed to send\n");
+ drm_dp_mst_dump_sideband_msg_tx(&p, txmsg);
return ret;
}
{
mutex_lock(&mgr->qlock);
list_add_tail(&txmsg->next, &mgr->tx_msg_downq);
+
+ if (drm_debug_enabled(DRM_UT_DP)) {
+ struct drm_printer p = drm_debug_printer(DBG_PREFIX);
+
+ drm_dp_mst_dump_sideband_msg_tx(&p, txmsg);
+ }
+
if (list_is_singular(&mgr->tx_msg_downq))
process_single_down_tx_qlock(mgr);
mutex_unlock(&mgr->qlock);
}
+static void
+drm_dp_dump_link_address(struct drm_dp_link_address_ack_reply *reply)
+{
+ struct drm_dp_link_addr_reply_port *port_reply;
+ int i;
+
+ for (i = 0; i < reply->nports; i++) {
+ port_reply = &reply->ports[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,
+ port_reply->input_port,
+ port_reply->peer_device_type,
+ port_reply->port_number,
+ port_reply->dpcd_revision,
+ port_reply->mcs,
+ port_reply->ddps,
+ port_reply->legacy_device_plug_status,
+ port_reply->num_sdp_streams,
+ port_reply->num_sdp_stream_sinks);
+ }
+}
+
static void drm_dp_send_link_address(struct drm_dp_mst_topology_mgr *mgr,
struct drm_dp_mst_branch *mstb)
{
- int len;
struct drm_dp_sideband_msg_tx *txmsg;
- int ret;
+ struct drm_dp_link_address_ack_reply *reply;
+ int i, len, ret;
txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL);
if (!txmsg)
mstb->link_address_sent = true;
drm_dp_queue_down_tx(mgr, txmsg);
+ /* FIXME: Actually do some real error handling here */
ret = drm_dp_mst_wait_tx_reply(mstb, txmsg);
- if (ret > 0) {
- int i;
+ if (ret <= 0) {
+ DRM_ERROR("Sending link address failed with %d\n", ret);
+ goto out;
+ }
+ if (txmsg->reply.reply_type == DP_SIDEBAND_REPLY_NAK) {
+ DRM_ERROR("link address NAK received\n");
+ ret = -EIO;
+ goto out;
+ }
- if (txmsg->reply.reply_type == DP_SIDEBAND_REPLY_NAK) {
- DRM_DEBUG_KMS("link address nak received\n");
- } 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,
- txmsg->reply.u.link_addr.ports[i].input_port,
- txmsg->reply.u.link_addr.ports[i].peer_device_type,
- txmsg->reply.u.link_addr.ports[i].port_number,
- txmsg->reply.u.link_addr.ports[i].dpcd_revision,
- txmsg->reply.u.link_addr.ports[i].mcs,
- txmsg->reply.u.link_addr.ports[i].ddps,
- txmsg->reply.u.link_addr.ports[i].legacy_device_plug_status,
- txmsg->reply.u.link_addr.ports[i].num_sdp_streams,
- txmsg->reply.u.link_addr.ports[i].num_sdp_stream_sinks);
- }
+ reply = &txmsg->reply.u.link_addr;
+ DRM_DEBUG_KMS("link address reply: %d\n", reply->nports);
+ drm_dp_dump_link_address(reply);
- drm_dp_check_mstb_guid(mstb, txmsg->reply.u.link_addr.guid);
+ drm_dp_check_mstb_guid(mstb, reply->guid);
- for (i = 0; i < txmsg->reply.u.link_addr.nports; i++) {
- drm_dp_add_port(mstb, mgr->dev, &txmsg->reply.u.link_addr.ports[i]);
- }
- drm_kms_helper_hotplug_event(mgr->dev);
- }
- } else {
- mstb->link_address_sent = false;
- DRM_DEBUG_KMS("link address failed %d\n", ret);
- }
+ for (i = 0; i < reply->nports; i++)
+ drm_dp_mst_handle_link_address_port(mstb, mgr->dev,
+ &reply->ports[i]);
+ drm_kms_helper_hotplug_event(mgr->dev);
+
+out:
+ if (ret <= 0)
+ mstb->link_address_sent = false;
kfree(txmsg);
}
-static int drm_dp_send_enum_path_resources(struct drm_dp_mst_topology_mgr *mgr,
- struct drm_dp_mst_branch *mstb,
- struct drm_dp_mst_port *port)
+static int
+drm_dp_send_enum_path_resources(struct drm_dp_mst_topology_mgr *mgr,
+ struct drm_dp_mst_branch *mstb,
+ struct drm_dp_mst_port *port)
{
- int len;
+ struct drm_dp_enum_path_resources_ack_reply *path_res;
struct drm_dp_sideband_msg_tx *txmsg;
+ int len;
int ret;
txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL);
ret = drm_dp_mst_wait_tx_reply(mstb, txmsg);
if (ret > 0) {
+ path_res = &txmsg->reply.u.path_resources;
+
if (txmsg->reply.reply_type == DP_SIDEBAND_REPLY_NAK) {
DRM_DEBUG_KMS("enum path resources nak received\n");
} else {
- if (port->port_num != txmsg->reply.u.path_resources.port_number)
+ if (port->port_num != path_res->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,
- txmsg->reply.u.path_resources.avail_payload_bw_number);
- port->available_pbn = txmsg->reply.u.path_resources.avail_payload_bw_number;
+
+ DRM_DEBUG_KMS("enum path resources %d: %d %d\n",
+ path_res->port_number,
+ path_res->full_payload_bw_number,
+ path_res->avail_payload_bw_number);
+ port->available_pbn =
+ path_res->avail_payload_bw_number;
}
}
return 0;
}
-static bool drm_dp_get_vc_payload_bw(int dp_link_bw,
- int dp_link_count,
- int *out)
+static int drm_dp_get_vc_payload_bw(u8 dp_link_bw, u8 dp_link_count)
{
- switch (dp_link_bw) {
- default:
+ if (dp_link_bw == 0 || dp_link_count == 0)
DRM_DEBUG_KMS("invalid link bandwidth in DPCD: %x (link count: %d)\n",
dp_link_bw, dp_link_count);
- return false;
- case DP_LINK_BW_1_62:
- *out = 3 * dp_link_count;
- break;
- case DP_LINK_BW_2_7:
- *out = 5 * dp_link_count;
- break;
- case DP_LINK_BW_5_4:
- *out = 10 * dp_link_count;
- break;
- case DP_LINK_BW_8_1:
- *out = 15 * dp_link_count;
- break;
- }
- return true;
+ return dp_link_bw * dp_link_count / 2;
}
/**
goto out_unlock;
}
- if (!drm_dp_get_vc_payload_bw(mgr->dpcd[1],
- mgr->dpcd[2] & DP_MAX_LANE_COUNT_MASK,
- &mgr->pbn_div)) {
+ mgr->pbn_div = drm_dp_get_vc_payload_bw(mgr->dpcd[1],
+ mgr->dpcd[2] & DP_MAX_LANE_COUNT_MASK);
+ if (mgr->pbn_div == 0) {
ret = -EINVAL;
goto out_unlock;
}
static int drm_dp_mst_handle_down_rep(struct drm_dp_mst_topology_mgr *mgr)
{
- int ret = 0;
+ struct drm_dp_sideband_msg_tx *txmsg;
+ struct drm_dp_mst_branch *mstb;
+ struct drm_dp_sideband_msg_hdr *hdr = &mgr->down_rep_recv.initial_hdr;
+ int slot = -1;
- if (!drm_dp_get_one_sb_msg(mgr, false)) {
- memset(&mgr->down_rep_recv, 0,
- sizeof(struct drm_dp_sideband_msg_rx));
+ if (!drm_dp_get_one_sb_msg(mgr, false))
+ goto clear_down_rep_recv;
+
+ if (!mgr->down_rep_recv.have_eomt)
return 0;
+
+ mstb = drm_dp_get_mst_branch_device(mgr, hdr->lct, hdr->rad);
+ if (!mstb) {
+ DRM_DEBUG_KMS("Got MST reply from unknown device %d\n",
+ hdr->lct);
+ goto clear_down_rep_recv;
}
- if (mgr->down_rep_recv.have_eomt) {
- struct drm_dp_sideband_msg_tx *txmsg;
- struct drm_dp_mst_branch *mstb;
- int slot = -1;
- mstb = drm_dp_get_mst_branch_device(mgr,
- mgr->down_rep_recv.initial_hdr.lct,
- mgr->down_rep_recv.initial_hdr.rad);
+ /* find the message */
+ slot = hdr->seqno;
+ mutex_lock(&mgr->qlock);
+ txmsg = mstb->tx_slots[slot];
+ /* remove from slots */
+ mutex_unlock(&mgr->qlock);
- if (!mstb) {
- DRM_DEBUG_KMS("Got MST reply from unknown device %d\n", mgr->down_rep_recv.initial_hdr.lct);
- memset(&mgr->down_rep_recv, 0, sizeof(struct drm_dp_sideband_msg_rx));
- return 0;
- }
+ if (!txmsg) {
+ DRM_DEBUG_KMS("Got MST reply with no msg %p %d %d %02x %02x\n",
+ mstb, hdr->seqno, hdr->lct, hdr->rad[0],
+ mgr->down_rep_recv.msg[0]);
+ goto no_msg;
+ }
- /* find the message */
- slot = mgr->down_rep_recv.initial_hdr.seqno;
- mutex_lock(&mgr->qlock);
- txmsg = mstb->tx_slots[slot];
- /* remove from slots */
- mutex_unlock(&mgr->qlock);
-
- if (!txmsg) {
- DRM_DEBUG_KMS("Got MST reply with no msg %p %d %d %02x %02x\n",
- mstb,
- mgr->down_rep_recv.initial_hdr.seqno,
- mgr->down_rep_recv.initial_hdr.lct,
- mgr->down_rep_recv.initial_hdr.rad[0],
- mgr->down_rep_recv.msg[0]);
- drm_dp_mst_topology_put_mstb(mstb);
- memset(&mgr->down_rep_recv, 0, sizeof(struct drm_dp_sideband_msg_rx));
- return 0;
- }
+ drm_dp_sideband_parse_reply(&mgr->down_rep_recv, &txmsg->reply);
- drm_dp_sideband_parse_reply(&mgr->down_rep_recv, &txmsg->reply);
+ if (txmsg->reply.reply_type == DP_SIDEBAND_REPLY_NAK)
+ DRM_DEBUG_KMS("Got NAK reply: req 0x%02x (%s), reason 0x%02x (%s), nak data 0x%02x\n",
+ txmsg->reply.req_type,
+ drm_dp_mst_req_type_str(txmsg->reply.req_type),
+ txmsg->reply.u.nak.reason,
+ drm_dp_mst_nak_reason_str(txmsg->reply.u.nak.reason),
+ txmsg->reply.u.nak.nak_data);
- if (txmsg->reply.reply_type == DP_SIDEBAND_REPLY_NAK)
- DRM_DEBUG_KMS("Got NAK reply: req 0x%02x (%s), reason 0x%02x (%s), nak data 0x%02x\n",
- txmsg->reply.req_type,
- drm_dp_mst_req_type_str(txmsg->reply.req_type),
- txmsg->reply.u.nak.reason,
- drm_dp_mst_nak_reason_str(txmsg->reply.u.nak.reason),
- txmsg->reply.u.nak.nak_data);
-
- memset(&mgr->down_rep_recv, 0, sizeof(struct drm_dp_sideband_msg_rx));
- drm_dp_mst_topology_put_mstb(mstb);
+ memset(&mgr->down_rep_recv, 0, sizeof(struct drm_dp_sideband_msg_rx));
+ drm_dp_mst_topology_put_mstb(mstb);
+
+ mutex_lock(&mgr->qlock);
+ txmsg->state = DRM_DP_SIDEBAND_TX_RX;
+ mstb->tx_slots[slot] = NULL;
+ mutex_unlock(&mgr->qlock);
- mutex_lock(&mgr->qlock);
- txmsg->state = DRM_DP_SIDEBAND_TX_RX;
- mstb->tx_slots[slot] = NULL;
- mutex_unlock(&mgr->qlock);
+ wake_up_all(&mgr->tx_waitq);
- wake_up_all(&mgr->tx_waitq);
- }
- return ret;
+ return 0;
+
+no_msg:
+ drm_dp_mst_topology_put_mstb(mstb);
+clear_down_rep_recv:
+ memset(&mgr->down_rep_recv, 0, sizeof(struct drm_dp_sideband_msg_rx));
+
+ return 0;
}
static int drm_dp_mst_handle_up_req(struct drm_dp_mst_topology_mgr *mgr)
{
- int ret = 0;
+ struct drm_dp_sideband_msg_req_body msg;
+ struct drm_dp_sideband_msg_hdr *hdr = &mgr->up_req_recv.initial_hdr;
+ struct drm_dp_mst_branch *mstb = NULL;
+ const u8 *guid;
+ bool seqno;
- if (!drm_dp_get_one_sb_msg(mgr, true)) {
- memset(&mgr->up_req_recv, 0,
- sizeof(struct drm_dp_sideband_msg_rx));
+ if (!drm_dp_get_one_sb_msg(mgr, true))
+ goto out;
+
+ if (!mgr->up_req_recv.have_eomt)
return 0;
- }
- if (mgr->up_req_recv.have_eomt) {
- struct drm_dp_sideband_msg_req_body msg;
- struct drm_dp_mst_branch *mstb = NULL;
- bool seqno;
-
- if (!mgr->up_req_recv.initial_hdr.broadcast) {
- mstb = drm_dp_get_mst_branch_device(mgr,
- mgr->up_req_recv.initial_hdr.lct,
- mgr->up_req_recv.initial_hdr.rad);
- if (!mstb) {
- DRM_DEBUG_KMS("Got MST reply from unknown device %d\n", mgr->up_req_recv.initial_hdr.lct);
- memset(&mgr->up_req_recv, 0, sizeof(struct drm_dp_sideband_msg_rx));
- return 0;
- }
+ if (!hdr->broadcast) {
+ mstb = drm_dp_get_mst_branch_device(mgr, hdr->lct, hdr->rad);
+ if (!mstb) {
+ DRM_DEBUG_KMS("Got MST reply from unknown device %d\n",
+ hdr->lct);
+ goto out;
}
+ }
- seqno = mgr->up_req_recv.initial_hdr.seqno;
- drm_dp_sideband_parse_req(&mgr->up_req_recv, &msg);
-
- if (msg.req_type == DP_CONNECTION_STATUS_NOTIFY) {
- drm_dp_send_up_ack_reply(mgr, mgr->mst_primary, msg.req_type, seqno, false);
-
- if (!mstb)
- mstb = drm_dp_get_mst_branch_device_by_guid(mgr, msg.u.conn_stat.guid);
-
- if (!mstb) {
- DRM_DEBUG_KMS("Got MST reply from unknown device %d\n", mgr->up_req_recv.initial_hdr.lct);
- memset(&mgr->up_req_recv, 0, sizeof(struct drm_dp_sideband_msg_rx));
- return 0;
- }
-
- drm_dp_update_port(mstb, &msg.u.conn_stat);
-
- DRM_DEBUG_KMS("Got CSN: pn: %d ldps:%d ddps: %d mcs: %d ip: %d pdt: %d\n", msg.u.conn_stat.port_number, msg.u.conn_stat.legacy_device_plug_status, msg.u.conn_stat.displayport_device_plug_status, msg.u.conn_stat.message_capability_status, msg.u.conn_stat.input_port, msg.u.conn_stat.peer_device_type);
- drm_kms_helper_hotplug_event(mgr->dev);
+ seqno = hdr->seqno;
+ drm_dp_sideband_parse_req(&mgr->up_req_recv, &msg);
- } else if (msg.req_type == DP_RESOURCE_STATUS_NOTIFY) {
- drm_dp_send_up_ack_reply(mgr, mgr->mst_primary, msg.req_type, seqno, false);
- if (!mstb)
- mstb = drm_dp_get_mst_branch_device_by_guid(mgr, msg.u.resource_stat.guid);
+ if (msg.req_type == DP_CONNECTION_STATUS_NOTIFY)
+ guid = msg.u.conn_stat.guid;
+ else if (msg.req_type == DP_RESOURCE_STATUS_NOTIFY)
+ guid = msg.u.resource_stat.guid;
+ else
+ goto out;
- if (!mstb) {
- DRM_DEBUG_KMS("Got MST reply from unknown device %d\n", mgr->up_req_recv.initial_hdr.lct);
- memset(&mgr->up_req_recv, 0, sizeof(struct drm_dp_sideband_msg_rx));
- return 0;
- }
+ drm_dp_send_up_ack_reply(mgr, mgr->mst_primary, msg.req_type, seqno,
+ false);
- DRM_DEBUG_KMS("Got RSN: pn: %d avail_pbn %d\n", msg.u.resource_stat.port_number, msg.u.resource_stat.available_pbn);
+ if (!mstb) {
+ mstb = drm_dp_get_mst_branch_device_by_guid(mgr, guid);
+ if (!mstb) {
+ DRM_DEBUG_KMS("Got MST reply from unknown device %d\n",
+ hdr->lct);
+ goto out;
}
+ }
- if (mstb)
- drm_dp_mst_topology_put_mstb(mstb);
+ if (msg.req_type == DP_CONNECTION_STATUS_NOTIFY) {
+ drm_dp_mst_handle_conn_stat(mstb, &msg.u.conn_stat);
- memset(&mgr->up_req_recv, 0, sizeof(struct drm_dp_sideband_msg_rx));
+ DRM_DEBUG_KMS("Got CSN: pn: %d ldps:%d ddps: %d mcs: %d ip: %d pdt: %d\n",
+ msg.u.conn_stat.port_number,
+ msg.u.conn_stat.legacy_device_plug_status,
+ msg.u.conn_stat.displayport_device_plug_status,
+ msg.u.conn_stat.message_capability_status,
+ msg.u.conn_stat.input_port,
+ msg.u.conn_stat.peer_device_type);
+
+ drm_kms_helper_hotplug_event(mgr->dev);
+ } else if (msg.req_type == DP_RESOURCE_STATUS_NOTIFY) {
+ DRM_DEBUG_KMS("Got RSN: pn: %d avail_pbn %d\n",
+ msg.u.resource_stat.port_number,
+ msg.u.resource_stat.available_pbn);
}
- return ret;
+
+ drm_dp_mst_topology_put_mstb(mstb);
+out:
+ memset(&mgr->up_req_recv, 0, sizeof(struct drm_dp_sideband_msg_rx));
+ return 0;
}
/**
{
struct drm_dp_mst_topology_state *topology_state;
struct drm_dp_vcpi_allocation *pos, *vcpi = NULL;
- int prev_slots, req_slots, ret;
+ int prev_slots, req_slots;
topology_state = drm_atomic_get_mst_topology_state(state, mgr);
if (IS_ERR(topology_state))
}
vcpi->vcpi = req_slots;
- ret = req_slots;
- return ret;
+ return req_slots;
}
EXPORT_SYMBOL(drm_dp_atomic_find_vcpi_slots);
*/
int drm_dp_calc_pbn_mode(int clock, int bpp)
{
- u64 kbps;
- s64 peak_kbps;
- u32 numerator;
- u32 denominator;
-
- kbps = clock * bpp;
-
/*
* margin 5300ppm + 300ppm ~ 0.6% as per spec, factor is 1.006
* The unit of 54/64Mbytes/sec is an arbitrary unit chosen based on
* peak_kbps *= (64/54)
* peak_kbps *= 8 convert to bytes
*/
-
- numerator = 64 * 1006;
- denominator = 54 * 8 * 1000 * 1000;
-
- kbps *= numerator;
- peak_kbps = drm_fixp_from_fraction(kbps, denominator);
-
- return drm_fixp2int_ceil(peak_kbps);
+ return DIV_ROUND_UP_ULL(mul_u32_u32(clock * bpp, 64 * 1006),
+ 8 * 54 * 1000 * 1000);
}
EXPORT_SYMBOL(drm_dp_calc_pbn_mode);
-static int test_calc_pbn_mode(void)
-{
- int ret;
- ret = drm_dp_calc_pbn_mode(154000, 30);
- if (ret != 689) {
- DRM_ERROR("PBN calculation test failed - clock %d, bpp %d, expected PBN %d, actual PBN %d.\n",
- 154000, 30, 689, ret);
- return -EINVAL;
- }
- ret = drm_dp_calc_pbn_mode(234000, 30);
- if (ret != 1047) {
- DRM_ERROR("PBN calculation test failed - clock %d, bpp %d, expected PBN %d, actual PBN %d.\n",
- 234000, 30, 1047, ret);
- return -EINVAL;
- }
- ret = drm_dp_calc_pbn_mode(297000, 24);
- if (ret != 1063) {
- DRM_ERROR("PBN calculation test failed - clock %d, bpp %d, expected PBN %d, actual PBN %d.\n",
- 297000, 24, 1063, ret);
- return -EINVAL;
- }
- return 0;
-}
-
/* we want to kick the TX after we've ack the up/down IRQs. */
static void drm_dp_mst_kick_tx(struct drm_dp_mst_topology_mgr *mgr)
{
list_del(&port->next);
mutex_unlock(&mgr->destroy_connector_lock);
- INIT_LIST_HEAD(&port->next);
-
mgr->cbs->destroy_connector(mgr, port->connector);
drm_dp_port_teardown_pdt(port, port->pdt);
struct drm_dp_mst_topology_state *drm_atomic_get_mst_topology_state(struct drm_atomic_state *state,
struct drm_dp_mst_topology_mgr *mgr)
{
- struct drm_device *dev = mgr->dev;
-
- WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
return to_dp_mst_topology_state(drm_atomic_get_private_obj_state(state, &mgr->base));
}
EXPORT_SYMBOL(drm_atomic_get_mst_topology_state);
if (!mgr->proposed_vcpis)
return -ENOMEM;
set_bit(0, &mgr->payload_mask);
- if (test_calc_pbn_mode() < 0)
- DRM_ERROR("MST PBN self-test failed\n");
mst_state = kzalloc(sizeof(*mst_state), GFP_KERNEL);
if (mst_state == NULL)
mgr->aux = NULL;
drm_atomic_private_obj_fini(&mgr->base);
mgr->funcs = NULL;
+
+ mutex_destroy(&mgr->destroy_connector_lock);
+ mutex_destroy(&mgr->payload_lock);
+ mutex_destroy(&mgr->qlock);
+ mutex_destroy(&mgr->lock);
}
EXPORT_SYMBOL(drm_dp_mst_topology_mgr_destroy);
projects / linux-2.6-microblaze.git / blobdiff