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[src/trunk]: src/sys/external/bsd/drm2/dist Rework drm_dp_mst_topology.c.



details:   https://anonhg.NetBSD.org/src/rev/d3c354957f1a
branches:  trunk
changeset: 992538:d3c354957f1a
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Mon Aug 27 06:56:02 2018 +0000

description:
Rework drm_dp_mst_topology.c.

- Need <linux/device.h> for dev_name.
- Need <linux/export.h> for EXPORT_*.
- Need <linux/module.h> for THIS_MODULE.
- Ifdef out debugfs stuff.
- Mark unused variables as such.
- Convert to drm waitqueue.  (There's even a lock here already...)
- Initialize and destroy mutexes appropriately.
- Ifdef out of_node.  Hope nobody needed it!

diffstat:

 sys/external/bsd/drm2/dist/drm/drm_dp_mst_topology.c       |  73 ++++++++++++-
 sys/external/bsd/drm2/dist/include/drm/drm_dp_mst_helper.h |   7 +-
 2 files changed, 68 insertions(+), 12 deletions(-)

diffs (273 lines):

diff -r a606fe2a52bb -r d3c354957f1a sys/external/bsd/drm2/dist/drm/drm_dp_mst_topology.c
--- a/sys/external/bsd/drm2/dist/drm/drm_dp_mst_topology.c      Mon Aug 27 06:55:52 2018 +0000
+++ b/sys/external/bsd/drm2/dist/drm/drm_dp_mst_topology.c      Mon Aug 27 06:56:02 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: drm_dp_mst_topology.c,v 1.2 2018/08/27 04:58:19 riastradh Exp $        */
+/*     $NetBSD: drm_dp_mst_topology.c,v 1.3 2018/08/27 06:56:02 riastradh Exp $        */
 
 /*
  * Copyright © 2014 Red Hat
@@ -23,7 +23,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: drm_dp_mst_topology.c,v 1.2 2018/08/27 04:58:19 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: drm_dp_mst_topology.c,v 1.3 2018/08/27 06:56:02 riastradh Exp $");
 
 #include <linux/kernel.h>
 #include <linux/delay.h>
@@ -32,6 +32,9 @@
 #include <linux/sched.h>
 #include <linux/seq_file.h>
 #include <linux/i2c.h>
+#include <linux/device.h>
+#include <linux/export.h>
+#include <linux/module.h>
 #include <drm/drm_dp_mst_helper.h>
 #include <drm/drmP.h>
 
@@ -44,8 +47,10 @@
  * protocol. The helpers contain a topology manager and bandwidth manager.
  * The helpers encapsulate the sending and received of sideband msgs.
  */
+#if IS_ENABLED(CONFIG_DEBUG_FS)
 static bool dump_dp_payload_table(struct drm_dp_mst_topology_mgr *mgr,
                                  char *buf);
+#endif
 static int test_calc_pbn_mode(void);
 
 static void drm_dp_put_port(struct drm_dp_mst_port *port);
@@ -324,7 +329,7 @@
                                      u8 *replybuf, u8 replybuflen, bool hdr)
 {
        int ret;
-       u8 crc4;
+       u8 crc4 __unused;       /* XXX Mistake?  */
 
        if (hdr) {
                u8 hdrlen;
@@ -762,10 +767,16 @@
        struct drm_dp_mst_topology_mgr *mgr = mstb->mgr;
        int ret;
 
+#ifdef __NetBSD__
+       mutex_lock(&mstb->mgr->qlock);
+       DRM_TIMED_WAIT_UNTIL(ret, &mgr->tx_waitq, &mstb->mgr->qlock, 4*HZ,
+           check_txmsg_state(mgr, txmsg));
+#else
        ret = wait_event_timeout(mgr->tx_waitq,
                                 check_txmsg_state(mgr, txmsg),
                                 (4 * HZ));
        mutex_lock(&mstb->mgr->qlock);
+#endif
        if (ret > 0) {
                if (txmsg->state == DRM_DP_SIDEBAND_TX_TIMEOUT) {
                        ret = -EIO;
@@ -859,10 +870,16 @@
                mstb->tx_slots[1] = NULL;
                wake_tx = true;
        }
+#ifdef __NetBSD__
+       if (wake_tx)
+               DRM_WAKEUP_ONE(&mstb->mgr->tx_waitq, &mstb->mgr->qlock);
+       mutex_unlock(&mstb->mgr->qlock);
+#else
        mutex_unlock(&mstb->mgr->qlock);
 
        if (wake_tx)
                wake_up(&mstb->mgr->tx_waitq);
+#endif
 
        kref_put(kref, drm_dp_free_mst_branch_device);
 }
@@ -1027,7 +1044,7 @@
  */
 static bool drm_dp_port_setup_pdt(struct drm_dp_mst_port *port)
 {
-       int ret;
+       int ret __unused;
        u8 rad[6], lct;
        bool send_link = false;
        switch (port->pdt) {
@@ -1051,7 +1068,7 @@
 
 static void drm_dp_check_mstb_guid(struct drm_dp_mst_branch *mstb, u8 *guid)
 {
-       int ret;
+       int ret __unused;
 
        memcpy(mstb->guid, guid, 16);
 
@@ -1520,7 +1537,11 @@
                if (txmsg->seqno != -1)
                        txmsg->dst->tx_slots[txmsg->seqno] = NULL;
                txmsg->state = DRM_DP_SIDEBAND_TX_TIMEOUT;
+#ifdef __NetBSD__
+               DRM_WAKEUP_ONE(&mgr->tx_waitq, &mgr->qlock);
+#else
                wake_up(&mgr->tx_waitq);
+#endif
        }
        if (list_empty(&mgr->tx_msg_downq)) {
                mgr->tx_down_in_progress = false;
@@ -1556,7 +1577,7 @@
 static void drm_dp_send_link_address(struct drm_dp_mst_topology_mgr *mgr,
                                     struct drm_dp_mst_branch *mstb)
 {
-       int len;
+       int len __unused;
        struct drm_dp_sideband_msg_tx *txmsg;
        int ret;
 
@@ -1610,7 +1631,7 @@
                                           struct drm_dp_mst_branch *mstb,
                                           struct drm_dp_mst_port *port)
 {
-       int len;
+       int len __unused;
        struct drm_dp_sideband_msg_tx *txmsg;
        int ret;
 
@@ -1678,7 +1699,7 @@
 {
        struct drm_dp_sideband_msg_tx *txmsg;
        struct drm_dp_mst_branch *mstb;
-       int len, ret, port_num;
+       int len __unused, ret, port_num;
 
        port = drm_dp_get_validated_port_ref(mgr, port);
        if (!port)
@@ -1925,7 +1946,7 @@
                                  struct drm_dp_mst_port *port,
                                  int offset, int size, u8 *bytes)
 {
-       int len;
+       int len __unused;
        int ret;
        struct drm_dp_sideband_msg_tx *txmsg;
        struct drm_dp_mst_branch *mstb;
@@ -2181,7 +2202,7 @@
 {
        int len;
        u8 replyblock[32];
-       int replylen, origlen, curreply;
+       int replylen, origlen __unused, curreply;
        int ret;
        struct drm_dp_sideband_msg_rx *msg;
        int basereg = up ? DP_SIDEBAND_MSG_UP_REQ_BASE : DP_SIDEBAND_MSG_DOWN_REP_BASE;
@@ -2280,9 +2301,14 @@
                mutex_lock(&mgr->qlock);
                txmsg->state = DRM_DP_SIDEBAND_TX_RX;
                mstb->tx_slots[slot] = NULL;
+#ifdef __NetBSD__
+               DRM_WAKEUP_ONE(&mstb->mgr->tx_waitq, &mstb->mgr->qlock);
+               mutex_unlock(&mgr->qlock);
+#else
                mutex_unlock(&mgr->qlock);
 
                wake_up(&mgr->tx_waitq);
+#endif
        }
        return ret;
 }
@@ -2743,6 +2769,7 @@
        queue_work(system_long_wq, &mgr->tx_work);
 }
 
+#if IS_ENABLED(CONFIG_DEBUG_FS)
 static void drm_dp_mst_dump_mstb(struct seq_file *m,
                                 struct drm_dp_mst_branch *mstb)
 {
@@ -2863,6 +2890,7 @@
 
 }
 EXPORT_SYMBOL(drm_dp_mst_dump_topology);
+#endif /* IS_ENABLED(CONFIG_DEBUG_FS) */
 
 static void drm_dp_tx_work(struct work_struct *work)
 {
@@ -2938,16 +2966,27 @@
                                 int max_dpcd_transaction_bytes,
                                 int max_payloads, int conn_base_id)
 {
+#ifdef __NetBSD__
+       linux_mutex_init(&mgr->lock);
+       linux_mutex_init(&mgr->qlock);
+       linux_mutex_init(&mgr->payload_lock);
+       linux_mutex_init(&mgr->destroy_connector_lock);
+#else
        mutex_init(&mgr->lock);
        mutex_init(&mgr->qlock);
        mutex_init(&mgr->payload_lock);
        mutex_init(&mgr->destroy_connector_lock);
+#endif
        INIT_LIST_HEAD(&mgr->tx_msg_downq);
        INIT_LIST_HEAD(&mgr->destroy_connector_list);
        INIT_WORK(&mgr->work, drm_dp_mst_link_probe_work);
        INIT_WORK(&mgr->tx_work, drm_dp_tx_work);
        INIT_WORK(&mgr->destroy_connector_work, drm_dp_destroy_connector_work);
+#ifdef __NetBSD__
+       DRM_INIT_WAITQUEUE(&mgr->tx_waitq, "dpmstwait");
+#else
        init_waitqueue_head(&mgr->tx_waitq);
+#endif
        mgr->dev = dev;
        mgr->aux = aux;
        mgr->max_dpcd_transaction_bytes = max_dpcd_transaction_bytes;
@@ -2981,6 +3020,18 @@
        mutex_unlock(&mgr->payload_lock);
        mgr->dev = NULL;
        mgr->aux = NULL;
+#ifdef __NetBSD__
+       DRM_DESTROY_WAITQUEUE(&mgr->tx_waitq);
+       linux_mutex_destroy(&mgr->destroy_connector_lock);
+       linux_mutex_destroy(&mgr->payload_lock);
+       linux_mutex_destroy(&mgr->qlock);
+       linux_mutex_destroy(&mgr->lock);
+#else
+       mutex_destroy(&mgr->destroy_connector_lock);
+       mutex_destroy(&mgr->payload_lock);
+       mutex_destroy(&mgr->qlock);
+       mutex_destroy(&mgr->lock);
+#endif
 }
 EXPORT_SYMBOL(drm_dp_mst_topology_mgr_destroy);
 
@@ -3084,7 +3135,9 @@
        aux->ddc.class = I2C_CLASS_DDC;
        aux->ddc.owner = THIS_MODULE;
        aux->ddc.dev.parent = aux->dev;
+#ifndef __NetBSD__             /* XXX of? */
        aux->ddc.dev.of_node = aux->dev->of_node;
+#endif
 
        strlcpy(aux->ddc.name, aux->name ? aux->name : dev_name(aux->dev),
                sizeof(aux->ddc.name));
diff -r a606fe2a52bb -r d3c354957f1a sys/external/bsd/drm2/dist/include/drm/drm_dp_mst_helper.h
--- a/sys/external/bsd/drm2/dist/include/drm/drm_dp_mst_helper.h        Mon Aug 27 06:55:52 2018 +0000
+++ b/sys/external/bsd/drm2/dist/include/drm/drm_dp_mst_helper.h        Mon Aug 27 06:56:02 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: drm_dp_mst_helper.h,v 1.5 2018/08/27 06:44:53 riastradh Exp $  */
+/*     $NetBSD: drm_dp_mst_helper.h,v 1.6 2018/08/27 06:56:02 riastradh Exp $  */
 
 /*
  * Copyright © 2014 Red Hat.
@@ -29,6 +29,7 @@
 #include <linux/mutex.h>
 #include <linux/types.h>
 #include <linux/workqueue.h>
+#include <drm/drmP.h>
 #include <drm/drm_dp_helper.h>
 
 struct drm_dp_mst_branch;
@@ -460,7 +461,9 @@
        unsigned long payload_mask;
        unsigned long vcpi_mask;
 
-#ifndef __NetBSD__
+#ifdef __NetBSD__
+       drm_waitqueue_t tx_waitq;
+#else
        wait_queue_head_t tx_waitq;
 #endif
        struct work_struct work;



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