ALSA: emu10k1: fix timer for E-MU cards at 44.1 kHz word clock

The timer was presuming a fixed 48 kHz word clock, like the rest of the
code.

Signed-off-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
Link: https://lore.kernel.org/r/20230612191325.1315854-8-oswald.buddenhagen@gmx.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

Author: ossilator

sound/pci/emu10k1/timer.c

@@ -38,20 +38,36 @@ static int snd_emu10k1_timer_stop(struct snd_timer *timer)
 	return 0;
 }
 
+static unsigned long snd_emu10k1_timer_c_resolution(struct snd_timer *timer)
+{
+	struct snd_emu10k1 *emu = snd_timer_chip(timer);
+
+	if (emu->card_capabilities->emu_model &&
+	    emu->emu1010.word_clock == 44100)
+		return 22676;  // 1 sample @ 44.1 kHz = 22.675736...us
+	else
+		return 20833;  // 1 sample @ 48 kHz = 20.833...us
+}
+
 static int snd_emu10k1_timer_precise_resolution(struct snd_timer *timer,
 					       unsigned long *num, unsigned long *den)
 {
+	struct snd_emu10k1 *emu = snd_timer_chip(timer);
+
 	*num = 1;
-	*den = 48000;
+	if (emu->card_capabilities->emu_model)
+		*den = emu->emu1010.word_clock;
+	else
+		*den = 48000;
 	return 0;
 }
 
 static const struct snd_timer_hardware snd_emu10k1_timer_hw = {
 	.flags = SNDRV_TIMER_HW_AUTO,
-	.resolution = 20833, /* 1 sample @ 48KHZ = 20.833...us */
 	.ticks = 1024,
 	.start = snd_emu10k1_timer_start,
 	.stop = snd_emu10k1_timer_stop,
+	.c_resolution = snd_emu10k1_timer_c_resolution,
 	.precise_resolution = snd_emu10k1_timer_precise_resolution,
 };