[src/trunk]: src/sys/dev Fix suspend/resume logic.

[nat <nat%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/a3a931634c1a
branches:  trunk
changeset: 819977:a3a931634c1a
user:      nat <nat%NetBSD.org@localhost>
date:      Sun Dec 25 22:44:24 2016 +0000

description:
Fix suspend/resume logic.

diffstat:

 sys/dev/audio.c |  88 ++++++++++++++++++++++++++++++++------------------------
 1 files changed, 50 insertions(+), 38 deletions(-)

diffs (159 lines):

diff -r 439f5e871019 -r a3a931634c1a sys/dev/audio.c
--- a/sys/dev/audio.c   Sun Dec 25 16:44:39 2016 +0000
+++ b/sys/dev/audio.c   Sun Dec 25 22:44:24 2016 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: audio.c,v 1.286 2016/12/23 21:01:00 nat Exp $  */
+/*     $NetBSD: audio.c,v 1.287 2016/12/25 22:44:24 nat Exp $  */
 
 /*-
  * Copyright (c) 2016 Nathanial Sloss <nathanialsloss%yahoo.com.au@localhost>
@@ -87,7 +87,7 @@
  */
 
 /*
- * Locking: there are three locks.
+ * Locking: there are two locks.
  *
  * - sc_lock, provided by the underlying driver.  This is an adaptive lock,
  *   returned in the second parameter to hw_if->get_locks().  It is known
@@ -148,7 +148,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: audio.c,v 1.286 2016/12/23 21:01:00 nat Exp $");
+__KERNEL_RCSID(0, "$NetBSD: audio.c,v 1.287 2016/12/25 22:44:24 nat Exp $");
 
 #include "audio.h"
 #if NAUDIO > 0
@@ -480,6 +480,7 @@
 
        sc->sc_trigger_started = false;
        sc->sc_rec_started = false;
+       sc->sc_dying = false;
        sc->sc_vchan[0] = kmem_zalloc(sizeof(struct virtual_channel), KM_SLEEP);
        vc = sc->sc_vchan[0];
        memset(sc->sc_audiopid, -1, sizeof(sc->sc_audiopid));
@@ -853,6 +854,7 @@
        case DVACT_DEACTIVATE:
                mutex_enter(sc->sc_lock);
                sc->sc_dying = true;
+               cv_broadcast(&sc->sc_condvar);
                mutex_exit(sc->sc_lock);
                return 0;
        default:
@@ -5018,23 +5020,27 @@
 {
        struct audio_softc *sc = device_private(dv);
        const struct audio_hw_if *hwp = sc->hw_if;
+       struct virtual_channel *vc;
        int n;
-
+       bool pbus, rbus;
+
+       pbus = rbus = false;
        mutex_enter(sc->sc_lock);
+       audio_mixer_capture(sc);
        for (n = 1; n < VAUDIOCHANS; n++) {
-               if (sc->sc_audiopid[n].pid == curproc->p_pid)
-                       break;
-       }
-       if (n == VAUDIOCHANS) {
-               mutex_exit(sc->sc_lock);
-               return false;
-       }
-
-       audio_mixer_capture(sc);
+               if (sc->sc_audiopid[n].pid == -1)
+                       continue;
+
+               vc = sc->sc_vchan[n];
+               if (vc->sc_pbus && !pbus)
+                       pbus = true;
+               if (vc->sc_rbus && !rbus)
+                       rbus = true;
+       }
        mutex_enter(sc->sc_intr_lock);
-       if (sc->sc_vchan[n]->sc_pbus == true)
+       if (pbus == true)
                hwp->halt_output(sc->hw_hdl);
-       if (sc->sc_recopens == 1 && sc->sc_vchan[n]->sc_rbus == true)
+       if (rbus == true)
                hwp->halt_input(sc->hw_hdl);
        mutex_exit(sc->sc_intr_lock);
 #ifdef AUDIO_PM_IDLE
@@ -5052,25 +5058,28 @@
        struct virtual_channel *vc;
        int n;
        
+       mutex_enter(sc->sc_lock);
+       sc->sc_trigger_started = false;
+       sc->sc_rec_started = false;
+
+       audio_set_vchan_defaults(sc, AUMODE_PLAY | AUMODE_PLAY_ALL |
+           AUMODE_RECORD, &vaudio_formats[0], 0);
+
+       audio_mixer_restore(sc);
        for (n = 1; n < VAUDIOCHANS; n++) {
-               if (sc->sc_audiopid[n].pid == curproc->p_pid)
-                       break;
-       }
-       
-       if (n == VAUDIOCHANS)
-               return false;
-       vc = sc->sc_vchan[n];
-
-       mutex_enter(sc->sc_lock);
-       if (vc->sc_lastinfovalid)
-               audiosetinfo(sc, &vc->sc_lastinfo, true, n);
-       audio_mixer_restore(sc);
-       mutex_enter(sc->sc_intr_lock);
-       if ((vc->sc_pbus == true) && !vc->sc_mpr.pause)
-               audiostartp(sc, n);
-       if ((vc->sc_rbus == true) && !vc->sc_mrr.pause)
-               audiostartr(sc, n);
-       mutex_exit(sc->sc_intr_lock);
+               if (sc->sc_audiopid[n].pid == -1)
+                       continue;
+               vc = sc->sc_vchan[n];
+
+               if (vc->sc_lastinfovalid == true)
+                       audiosetinfo(sc, &vc->sc_lastinfo, true, n);
+               mutex_enter(sc->sc_intr_lock);
+               if (vc->sc_pbus == true && !vc->sc_mpr.pause)
+                       audiostartp(sc, n);
+               if (vc->sc_rbus == true && !vc->sc_mrr.pause)
+                       audiostartr(sc, n);
+               mutex_exit(sc->sc_intr_lock);
+       }
        mutex_exit(sc->sc_lock);
 
        return true;
@@ -5248,6 +5257,7 @@
        vc = sc->sc_vchan[0];
        blksize = vc->sc_mpr.blksize;
        cc = blksize;
+       error = 0;
 
        cc1 = cc;
        if (vc->sc_pustream->inp + cc > vc->sc_pustream->end)
@@ -5280,13 +5290,15 @@
                error = sc->hw_if->start_output(sc->hw_hdl,
                    __UNCONST(vc->sc_mpr.s.outp), blksize,
                    audio_pint, (void *)sc);
-               if (error) {
-                       /* XXX does this really help? */
-                       DPRINTF(("audio_mix restart failed: %d\n", error));
-                       audio_clear(sc, 0);
-               }
        }
        sc->sc_trigger_started = true;
+
+       if (error) {
+               /* XXX does this really help? */
+               DPRINTF(("audio_mix restart failed: %d\n", error));
+               audio_clear(sc, 0);
+               sc->sc_trigger_started = false;
+       }
 }
 
 void