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authorStas Sergeev <stsp@aknet.ru>2008-05-17 08:44:41 +0200
committerTakashi Iwai <tiwai@suse.de>2008-05-19 12:06:25 +0200
commit4dfd79546dfed83bf756f5c912f686ebac187c16 (patch)
treeaa8654734026eb300bc9d8d30f774fe4a642492d /sound
parent3ccee69019d3b23f02204f4c2cb3085f436da252 (diff)
downloadlinux-4dfd79546dfed83bf756f5c912f686ebac187c16.tar.gz
snd-pcsp: put back the compatibility code for the older alsa-libs
The attached patch adds back the compatibility code, allowing the driver to work with older alsa-libs. The removal was premature, it breaks the real-life configs. Signed-off-by: Stas Sergeev <stsp@aknet.ru> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
-rw-r--r--sound/drivers/pcsp/pcsp_lib.c19
1 files changed, 14 insertions, 5 deletions
diff --git a/sound/drivers/pcsp/pcsp_lib.c b/sound/drivers/pcsp/pcsp_lib.c
index ac6238e9351..54253e9b4b0 100644
--- a/sound/drivers/pcsp/pcsp_lib.c
+++ b/sound/drivers/pcsp/pcsp_lib.c
@@ -18,6 +18,8 @@ module_param(nforce_wa, bool, 0444);
MODULE_PARM_DESC(nforce_wa, "Apply NForce chipset workaround "
"(expect bad sound)");
+#define DMIX_WANTS_S16 1
+
static void pcsp_start_timer(unsigned long dummy)
{
hrtimer_start(&pcsp_chip.timer, ktime_set(0, 0), HRTIMER_MODE_REL);
@@ -47,7 +49,7 @@ enum hrtimer_restart pcsp_do_timer(struct hrtimer *handle)
{
unsigned long flags;
unsigned char timer_cnt, val;
- int periods_elapsed;
+ int fmt_size, periods_elapsed;
u64 ns;
size_t period_bytes, buffer_bytes;
struct snd_pcm_substream *substream;
@@ -92,8 +94,11 @@ enum hrtimer_restart pcsp_do_timer(struct hrtimer *handle)
goto exit_nr_unlock2;
runtime = substream->runtime;
- /* assume it is u8 mono */
- val = runtime->dma_area[chip->playback_ptr];
+ fmt_size = snd_pcm_format_physical_width(runtime->format) >> 3;
+ /* assume it is mono! */
+ val = runtime->dma_area[chip->playback_ptr + fmt_size - 1];
+ if (snd_pcm_format_signed(runtime->format))
+ val ^= 0x80;
timer_cnt = val * CUR_DIV() / 256;
if (timer_cnt && chip->enable) {
@@ -111,7 +116,7 @@ enum hrtimer_restart pcsp_do_timer(struct hrtimer *handle)
period_bytes = snd_pcm_lib_period_bytes(substream);
buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
- chip->playback_ptr += PCSP_INDEX_INC();
+ chip->playback_ptr += PCSP_INDEX_INC() * fmt_size;
periods_elapsed = chip->playback_ptr - chip->period_ptr;
if (periods_elapsed < 0) {
printk(KERN_WARNING "PCSP: playback_ptr inconsistent "
@@ -270,7 +275,11 @@ static struct snd_pcm_hardware snd_pcsp_playback = {
.info = (SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_HALF_DUPLEX |
SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID),
- .formats = SNDRV_PCM_FMTBIT_U8,
+ .formats = (SNDRV_PCM_FMTBIT_U8
+#if DMIX_WANTS_S16
+ | SNDRV_PCM_FMTBIT_S16_LE
+#endif
+ ),
.rates = SNDRV_PCM_RATE_KNOT,
.rate_min = PCSP_DEFAULT_SRATE,
.rate_max = PCSP_DEFAULT_SRATE,