TAS2505: Enhancing the speaker volume through amplifier registers causes distorted output on speaker.

Hello,

We have used the TAS2505 amplifier in our custom board. The board has imx8mn processor.
There is a requirement from the customer to enhance the speaker output. But when we are increasing the gain value we hear distortion on the speaker output.
We are using the driver files from the below link,
git.ti.com/.../

We are modifying below registers,
1) Page1 register46 Speaker Volume Control Register

Changed the gain value to 0 from -2.5. 
2) Page1 register48 Speaker Amplifier Volume Control 2

 --- a/sound/soc/codecs/tas2505.c
+++ b/sound/soc/codecs/tas2505.c

@@ -305,7 +314,7 @@ static int tas2505_dac_mute(struct snd_soc_dai *codec_dai, int mute)
                snd_soc_update_bits(codec, TAS2505_DACSETUP2,
                        TAS2505_DACSETUP2_MUTE_MASK, 0x0);
                usleep_range(500, 1000);
-               snd_soc_write(codec, TAS2505_SPKVOL2, 0x20);
+               snd_soc_write(codec, TAS2505_SPKVOL2, 0x30);

Thanks,
Sujay