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[2/2] ASoC: cs35l56: Limit Speaker Volume to +12dB maximum

Message ID 20240703095517.208077-3-rf@opensource.cirrus.com
State Accepted
Commit 244389bd42870640c4b5ef672a360da329b579ed
Headers show
Series ASoC: cs35l56: Set correct upper volume limit | expand

Commit Message

Richard Fitzgerald July 3, 2024, 9:55 a.m. UTC 
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>
---
 include/sound/cs35l56.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/include/sound/cs35l56.h b/include/sound/cs35l56.h
index 642ef690ebc2..a6aa112e5741 100644
--- a/include/sound/cs35l56.h
+++ b/include/sound/cs35l56.h
@@ -207,7 +207,7 @@ 
 
 /* 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