@@ -315,6 +315,18 @@ static int hda_tegra_first_init(struct azx *chip, struct platform_device *pdev)
* hardcoded value
*/
chip->capture_streams = (gcap >> 8) & 0x0f;
+
+ /* The GCAP register on Tegra234 implies no Input Streams(ISS) support,
+ * but the HW output stream descriptor programming should start with
+ * offset 0x20*4 from base stream descriptor address. This will be a
+ * problem while calculating the offset for output stream descriptor
+ * which will be considering input stream also. So here output stream
+ * starts with offset 0 which is wrong as HW register for output stream
+ * offset starts with 4.
+ */
+ if (of_device_is_compatible(np, "nvidia,tegra234-hda"))
+ chip->capture_streams = 4;
+
chip->playback_streams = (gcap >> 12) & 0x0f;
if (!chip->playback_streams && !chip->capture_streams) {
/* gcap didn't give any info, switching to old method */
The GCAP register on Tegra234 implies no Input Streams(ISS) supported, but the HW output stream descriptor programming should start with offset 0x20*4 from base stream descriptor address. This will be a problem while calculating the offset for output stream descriptor which will be considering input stream also. So here output stream starts with offset 0 which is wrong as HW register for output stream offset starts with 4. So hardcode the input stream numbers to 4 to avoid the issue in offset calculation. Signed-off-by: Mohan Kumar <mkumard@nvidia.com> --- sound/pci/hda/hda_tegra.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)