ALSA: pcsp - Fix nforce workaround

The attached patch fixes the problems introduced in this commit:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=eea0579fc85e64e9f05361d5aacf496fe7a151aa

- Fix nForce workaround by honouring the pointer_update var
- Revert "ns" to u64, as per the hrtimer API
- Revert to the zero-delay timer startup, since I can't reproduce any
  problem with it (please, give me the hint!)

Signed-off-by: Stas Sergeev <stsp@aknet.ru>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

2 files changed, 35 insertions, 32 deletions

diff --git a/sound/drivers/pcsp/pcsp_lib.c b/sound/drivers/pcsp/pcsp_lib.c
index 84cc2658c05b..e1145ac6e908 100644
--- a/sound/drivers/pcsp/pcsp_lib.c
+++ b/sound/drivers/pcsp/pcsp_lib.c
@@ -39,25 +39,20 @@ static DECLARE_TASKLET(pcsp_pcm_tasklet, pcsp_call_pcm_elapsed, 0);
 /* write the port and returns the next expire time in ns;
  * called at the trigger-start and in hrtimer callback
  */
-static unsigned long pcsp_timer_update(struct hrtimer *handle)
+static u64 pcsp_timer_update(struct snd_pcsp *chip)
 {
         unsigned char timer_cnt, val;
         u64 ns;
         struct snd_pcm_substream *substream;
         struct snd_pcm_runtime *runtime;
-        struct snd_pcsp *chip = container_of(handle, struct snd_pcsp, timer);
         unsigned long flags;
 
         if (chip->thalf) {
                 outb(chip->val61, 0x61);
                 chip->thalf = 0;
-                if (!atomic_read(&chip->timer_active))
-                        return 0;
                 return chip->ns_rem;
         }
 
-        if (!atomic_read(&chip->timer_active))
-                return 0;
         substream = chip->playback_substream;
         if (!substream)
                 return 0;
@@ -88,24 +83,17 @@ static unsigned long pcsp_timer_update(struct hrtimer *handle)
         return ns;
 }
 
-enum hrtimer_restart pcsp_do_timer(struct hrtimer *handle)
+static void pcsp_pointer_update(struct snd_pcsp *chip)
 {
-        struct snd_pcsp *chip = container_of(handle, struct snd_pcsp, timer);
         struct snd_pcm_substream *substream;
-        int periods_elapsed, pointer_update;
         size_t period_bytes, buffer_bytes;
-        unsigned long ns;
+        int periods_elapsed;
         unsigned long flags;
 
-        pointer_update = !chip->thalf;
-        ns = pcsp_timer_update(handle);
-        if (!ns)
-                return HRTIMER_NORESTART;
-
         /* update the playback position */
         substream = chip->playback_substream;
         if (!substream)
-                return HRTIMER_NORESTART;
+                return;
 
         period_bytes = snd_pcm_lib_period_bytes(substream);
         buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
@@ -134,6 +122,26 @@ enum hrtimer_restart pcsp_do_timer(struct hrtimer *handle)
 
         if (periods_elapsed)
                 tasklet_schedule(&pcsp_pcm_tasklet);
+}
+
+enum hrtimer_restart pcsp_do_timer(struct hrtimer *handle)
+{
+        struct snd_pcsp *chip = container_of(handle, struct snd_pcsp, timer);
+        int pointer_update;
+        u64 ns;
+
+        if (!atomic_read(&chip->timer_active) || !chip->playback_substream)
+                return HRTIMER_NORESTART;
+
+        pointer_update = !chip->thalf;
+        ns = pcsp_timer_update(chip);
+        if (!ns) {
+                printk(KERN_WARNING "PCSP: unexpected stop\n");
+                return HRTIMER_NORESTART;
+        }
+
+        if (pointer_update)
+                pcsp_pointer_update(chip);
 
         hrtimer_forward(handle, hrtimer_get_expires(handle), ns_to_ktime(ns));
 
@@ -142,8 +150,6 @@ enum hrtimer_restart pcsp_do_timer(struct hrtimer *handle)
 
 static int pcsp_start_playing(struct snd_pcsp *chip)
 {
-        unsigned long ns;
-
 #if PCSP_DEBUG
         printk(KERN_INFO "PCSP: start_playing called\n");
 #endif
@@ -159,11 +165,7 @@ static int pcsp_start_playing(struct snd_pcsp *chip)
         atomic_set(&chip->timer_active, 1);
         chip->thalf = 0;
 
-        ns = pcsp_timer_update(&pcsp_chip.timer);
-        if (!ns)
-                return -EIO;
-
-        hrtimer_start(&pcsp_chip.timer, ktime_set(0, ns), HRTIMER_MODE_REL);
+        hrtimer_start(&pcsp_chip.timer, ktime_set(0, 0), HRTIMER_MODE_REL);
         return 0;
 }
 
@@ -232,21 +234,22 @@ static int snd_pcsp_playback_hw_free(struct snd_pcm_substream *substream)
 static int snd_pcsp_playback_prepare(struct snd_pcm_substream *substream)
 {
         struct snd_pcsp *chip = snd_pcm_substream_chip(substream);
+        pcsp_sync_stop(chip);
+        chip->playback_ptr = 0;
+        chip->period_ptr = 0;
+        chip->fmt_size =
+                snd_pcm_format_physical_width(substream->runtime->format) >> 3;
+        chip->is_signed = snd_pcm_format_signed(substream->runtime->format);
 #if PCSP_DEBUG
         printk(KERN_INFO "PCSP: prepare called, "
-                        "size=%zi psize=%zi f=%zi f1=%i\n",
+                        "size=%zi psize=%zi f=%zi f1=%i fsize=%i\n",
                         snd_pcm_lib_buffer_bytes(substream),
                         snd_pcm_lib_period_bytes(substream),
                         snd_pcm_lib_buffer_bytes(substream) /
                         snd_pcm_lib_period_bytes(substream),
-                        substream->runtime->periods);
+                        substream->runtime->periods,
+                        chip->fmt_size);
 #endif
-        pcsp_sync_stop(chip);
-        chip->playback_ptr = 0;
-        chip->period_ptr = 0;
-        chip->fmt_size =
-                snd_pcm_format_physical_width(substream->runtime->format) >> 3;
-        chip->is_signed = snd_pcm_format_signed(substream->runtime->format);
         return 0;
 }
 
diff --git a/sound/drivers/pcsp/pcsp_mixer.c b/sound/drivers/pcsp/pcsp_mixer.c
index 199b03377142..903bc846763f 100644
--- a/sound/drivers/pcsp/pcsp_mixer.c
+++ b/sound/drivers/pcsp/pcsp_mixer.c
@@ -72,7 +72,7 @@ static int pcsp_treble_put(struct snd_kcontrol *kcontrol,
         if (treble != chip->treble) {
                 chip->treble = treble;
 #if PCSP_DEBUG
-                printk(KERN_INFO "PCSP: rate set to %i\n", PCSP_RATE());
+                printk(KERN_INFO "PCSP: rate set to %li\n", PCSP_RATE());
 #endif
                 changed = 1;
         }