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-rw-r--r--sound/soc/intel/skylake/skl.c26
1 files changed, 17 insertions, 9 deletions
diff --git a/sound/soc/intel/skylake/skl.c b/sound/soc/intel/skylake/skl.c
index 41a084b3d48f..72e366bbba33 100644
--- a/sound/soc/intel/skylake/skl.c
+++ b/sound/soc/intel/skylake/skl.c
@@ -946,6 +946,12 @@ static int skl_first_init(struct hdac_bus *bus)
snd_hdac_bus_parse_capabilities(bus);
+ /* check if PPCAP exists */
+ if (!bus->ppcap) {
+ dev_err(bus->dev, "bus ppcap not set, HDaudio or DSP not present?\n");
+ return -ENODEV;
+ }
+
if (skl_acquire_irq(bus, 0) < 0)
return -EBUSY;
@@ -955,23 +961,25 @@ static int skl_first_init(struct hdac_bus *bus)
gcap = snd_hdac_chip_readw(bus, GCAP);
dev_dbg(bus->dev, "chipset global capabilities = 0x%x\n", gcap);
- /* allow 64bit DMA address if supported by H/W */
- if (!dma_set_mask(bus->dev, DMA_BIT_MASK(64))) {
- dma_set_coherent_mask(bus->dev, DMA_BIT_MASK(64));
- } else {
- dma_set_mask(bus->dev, DMA_BIT_MASK(32));
- dma_set_coherent_mask(bus->dev, DMA_BIT_MASK(32));
- }
-
/* read number of streams from GCAP register */
cp_streams = (gcap >> 8) & 0x0f;
pb_streams = (gcap >> 12) & 0x0f;
- if (!pb_streams && !cp_streams)
+ if (!pb_streams && !cp_streams) {
+ dev_err(bus->dev, "no streams found in GCAP definitions?\n");
return -EIO;
+ }
bus->num_streams = cp_streams + pb_streams;
+ /* allow 64bit DMA address if supported by H/W */
+ if (!dma_set_mask(bus->dev, DMA_BIT_MASK(64))) {
+ dma_set_coherent_mask(bus->dev, DMA_BIT_MASK(64));
+ } else {
+ dma_set_mask(bus->dev, DMA_BIT_MASK(32));
+ dma_set_coherent_mask(bus->dev, DMA_BIT_MASK(32));
+ }
+
/* initialize streams */
snd_hdac_ext_stream_init_all
(bus, 0, cp_streams, SNDRV_PCM_STREAM_CAPTURE);