ASoC: cs35l56: Limit Speaker Volume to +12dB maximum

commit 244389bd42870640c4b5ef672a360da329b579ed upstream.

Change CS35L56_MAIN_RENDER_USER_VOLUME_MAX to 48, to limit the maximum
value of the Speaker Volume control to +12dB. The minimum value is
unchanged so that the default 0dB has the same integer control value.

The original maximum of 400 (+100dB) was the largest value that can be
mathematically handled by the DSP. The actual maximum amplification is
+12dB.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Link: https://patch.msgid.link/20240703095517.208077-3-rf@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/include/sound/cs35l56.h b/include/sound/cs35l56.h
index 1a3c6f66f6205597cb46b3c7cc826802fc35c740..dc627ebf01df839150a5f043f25193eb187ccb35 100644 (file)
--- a/include/sound/cs35l56.h
+++ b/include/sound/cs35l56.h
@@ -209,7 +209,7 @@
 
 /* CS35L56_MAIN_RENDER_USER_VOLUME */
 #define CS35L56_MAIN_RENDER_USER_VOLUME_MIN            -400
-#define CS35L56_MAIN_RENDER_USER_VOLUME_MAX            400
+#define CS35L56_MAIN_RENDER_USER_VOLUME_MAX            48
 #define CS35L56_MAIN_RENDER_USER_VOLUME_MASK           0x0000FFC0
 #define CS35L56_MAIN_RENDER_USER_VOLUME_SHIFT          6
 #define CS35L56_MAIN_RENDER_USER_VOLUME_SIGNBIT                9