bits 16:17 in SD_CTL register refer to stripe control. Added an
offset register(AZX_REG_SD_CTL_3B) to have exclusive read/write
of corresponding register byte. This helps to avoid unnecessary
32-bit read/write of SD_CTL whenever only stripe or other bits of
corresponding byte need to be updated. Also HD audio spec defines
SD_CTL as 3 byte register.
Signed-off-by: Sameer Pujar <spujar@xxxxxxxxxx>
Reviewed-by: Mohan Kumar D <mkumard@xxxxxxxxxx>
Reviewed-by: Ravindra Lokhande <rlokhande@xxxxxxxxxx>
---
include/sound/hda_register.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/include/sound/hda_register.h b/include/sound/hda_register.h
index 2ab39fb..5b1f5d8 100644
--- a/include/sound/hda_register.h
+++ b/include/sound/hda_register.h
@@ -79,6 +79,7 @@ enum { SDI0, SDI1, SDI2, SDI3, SDO0, SDO1, SDO2, SDO3 };
/* stream register offsets from stream base */
#define AZX_REG_SD_CTL 0x00
+#define AZX_REG_SD_CTL_3B 0x02 /* 3rd byte of SD_CTL register */
#define AZX_REG_SD_STS 0x03
#define AZX_REG_SD_LPIB 0x04
#define AZX_REG_SD_CBL 0x08
--
2.7.4
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