[RFC PATCH 07/40] soundwire: intel: fix channel number reported by hardware

Pierre-Louis Bossart
2019-07-25T23:43:40Z

PDI2 reports an invalid count, force the correct hardware-supported
value

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
---
drivers/soundwire/intel.c | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c
index 497879dd9c0d..51990b192dc0 100644
--- a/drivers/soundwire/intel.c
+++ b/drivers/soundwire/intel.c
@@ -401,6 +401,15 @@ intel_pdi_get_ch_cap(struct sdw_intel *sdw, unsigned int pdi_num, bool pcm)

if (pcm) {
count = intel_readw(shim, SDW_SHIM_PCMSYCHC(link_id, pdi_num));
+
+ /*
+ * TODO: pdi number 2 reports channel count as 1 even though
+ * it supports 8 channel. Performing hardcoding for pdi
+ * number 2.
+ */
+ if (pdi_num == 2)
+ count = 7;
+
} else {
count = intel_readw(shim, SDW_SHIM_PDMSCAP(link_id));
count = ((count & SDW_SHIM_PDMSCAP_CPSS) >>
--
2.20.1