ALSA: hda: Prepare for compress stream support

Before introducing compress specific changes, adjust BDL and parameters
setup functions so these are not tightly coupled with PCM streams.
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20221202152841.672536-3-cezary.rojewski@intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/hda/hdac_stream.c

@@ -487,11 +487,15 @@ int snd_hdac_stream_setup_periods(struct hdac_stream *azx_dev)
 {
 	struct hdac_bus *bus = azx_dev->bus;
 	struct snd_pcm_substream *substream = azx_dev->substream;
-	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct snd_pcm_runtime *runtime;
+	struct snd_dma_buffer *dmab;
 	__le32 *bdl;
 	int i, ofs, periods, period_bytes;
 	int pos_adj, pos_align;
 
+	runtime = substream->runtime;
+	dmab = snd_pcm_get_dma_buf(substream);
+
 	/* reset BDL address */
 	snd_hdac_stream_writel(azx_dev, SD_BDLPL, 0);
 	snd_hdac_stream_writel(azx_dev, SD_BDLPU, 0);
@@ -505,7 +509,7 @@ int snd_hdac_stream_setup_periods(struct hdac_stream *azx_dev)
 	azx_dev->frags = 0;
 
 	pos_adj = bus->bdl_pos_adj;
-	if (!azx_dev->no_period_wakeup && pos_adj > 0) {
+	if (runtime && !azx_dev->no_period_wakeup && pos_adj > 0) {
 		pos_align = pos_adj;
 		pos_adj = DIV_ROUND_UP(pos_adj * runtime->rate, 48000);
 		if (!pos_adj)
@@ -518,8 +522,7 @@ int snd_hdac_stream_setup_periods(struct hdac_stream *azx_dev)
 				 pos_adj);
 			pos_adj = 0;
 		} else {
-			ofs = setup_bdle(bus, snd_pcm_get_dma_buf(substream),
-					 azx_dev,
+			ofs = setup_bdle(bus, dmab, azx_dev,
 					 &bdl, ofs, pos_adj, true);
 			if (ofs < 0)
 				goto error;
@@ -529,13 +532,11 @@ int snd_hdac_stream_setup_periods(struct hdac_stream *azx_dev)
 
 	for (i = 0; i < periods; i++) {
 		if (i == periods - 1 && pos_adj)
-			ofs = setup_bdle(bus, snd_pcm_get_dma_buf(substream),
-					 azx_dev, &bdl, ofs,
-					 period_bytes - pos_adj, 0);
+			ofs = setup_bdle(bus, dmab, azx_dev,
+					 &bdl, ofs, period_bytes - pos_adj, 0);
 		else
-			ofs = setup_bdle(bus, snd_pcm_get_dma_buf(substream),
-					 azx_dev, &bdl, ofs,
-					 period_bytes,
+			ofs = setup_bdle(bus, dmab, azx_dev,
+					 &bdl, ofs, period_bytes,
 					 !azx_dev->no_period_wakeup);
 		if (ofs < 0)
 			goto error;
@@ -560,26 +561,25 @@ EXPORT_SYMBOL_GPL(snd_hdac_stream_setup_periods);
 int snd_hdac_stream_set_params(struct hdac_stream *azx_dev,
 				 unsigned int format_val)
 {
-
-	unsigned int bufsize, period_bytes;
 	struct snd_pcm_substream *substream = azx_dev->substream;
-	struct snd_pcm_runtime *runtime;
+	unsigned int bufsize, period_bytes;
+	unsigned int no_period_wakeup;
 	int err;
 
 	if (!substream)
 		return -EINVAL;
-	runtime = substream->runtime;
 	bufsize = snd_pcm_lib_buffer_bytes(substream);
 	period_bytes = snd_pcm_lib_period_bytes(substream);
+	no_period_wakeup = substream->runtime->no_period_wakeup;
 
 	if (bufsize != azx_dev->bufsize ||
 	    period_bytes != azx_dev->period_bytes ||
 	    format_val != azx_dev->format_val ||
-	    runtime->no_period_wakeup != azx_dev->no_period_wakeup) {
+	    no_period_wakeup != azx_dev->no_period_wakeup) {
 		azx_dev->bufsize = bufsize;
 		azx_dev->period_bytes = period_bytes;
 		azx_dev->format_val = format_val;
-		azx_dev->no_period_wakeup = runtime->no_period_wakeup;
+		azx_dev->no_period_wakeup = no_period_wakeup;
 		err = snd_hdac_stream_setup_periods(azx_dev);
 		if (err < 0)
 			return err;