[alsa-devel] [PATCH 5/5] ASoC: SOF: Force polling mode on CFL and CNL

[Bard liao]

From: Bard Liao <yung-chuan.liao at linux.intel.com>

There is a workaround in legacy HDA codec for too long time respone
with CFL machine. We need the same workaround on SOF driver. The same
issue is also seen on CNL machine.

Signed-off-by: Bard Liao <yung-chuan.liao at linux.intel.com>
---
 sound/soc/sof/intel/hda.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/sound/soc/sof/intel/hda.c b/sound/soc/sof/intel/hda.c
index 5c78f4dde6f5..b9f3c802924b 100644
--- a/sound/soc/sof/intel/hda.c
+++ b/sound/soc/sof/intel/hda.c
@@ -32,6 +32,9 @@
 /* platform specific devices */
 #include "shim.h"
 
+#define IS_CFL(pci) ((pci)->vendor == 0x8086 && (pci)->device == 0xa348)
+#define IS_CNL(pci) ((pci)->vendor == 0x8086 && (pci)->device == 0x9dc8)
+
 /*
  * Debug
  */
@@ -217,6 +220,11 @@ static int hda_init(struct snd_sof_dev *sdev)
 	ext_ops = snd_soc_hdac_hda_get_ops();
 #endif
 	sof_hda_bus_init(bus, &pci->dev, ext_ops);
+
+	/* Workaround for a communication error on CFL (bko#199007) and CNL */
+	if (IS_CFL(pci) || IS_CNL(pci))
+		bus->polling_mode = 1;
+
 	bus->use_posbuf = 1;
 	bus->bdl_pos_adj = 0;
 
-- 
2.17.1