ASoC: da7219: Support HP detect procedure when MCLK not present

Currently the driver code assumes that MCLK will be present during
the procedure, or if it has control of MCLK then it can make sure
it's enabled. Some platforms however do not provide MCLK to the
driver in this way, and will not leave MCLK enabled when Codec is
in STANDBY state.

This patch adds support for the HP detect procedure when running
from the device's internal oscillator, to ensure all platforms
can make use of this feature correctly.

Signed-off-by: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/sound/soc/codecs/da7219.h b/sound/soc/codecs/da7219.h
index ff2a2f0..545576d 100644
--- a/sound/soc/codecs/da7219.h
+++ b/sound/soc/codecs/da7219.h
@@ -224,6 +224,7 @@
 #define DA7219_PLL_SRM_STATE_MASK	(0xF << 0)
 #define DA7219_PLL_SRM_STATUS_SHIFT	4
 #define DA7219_PLL_SRM_STATUS_MASK	(0xF << 4)
+#define DA7219_PLL_SRM_STS_MCLK		(0x1 << 4)
 #define DA7219_PLL_SRM_STS_SRM_LOCK	(0x1 << 7)
 
 /* DA7219_DIG_ROUTING_DAI = 0x2A */
@@ -576,6 +577,7 @@
 /* DA7219_GAIN_RAMP_CTRL = 0x92 */
 #define DA7219_GAIN_RAMP_RATE_SHIFT	0
 #define DA7219_GAIN_RAMP_RATE_MASK	(0x3 << 0)
+#define DA7219_GAIN_RAMP_RATE_X8	(0x0 << 0)
 #define DA7219_GAIN_RAMP_RATE_MAX	4
 
 /* DA7219_PC_COUNT = 0x94 */