12 Oct
2021
12 Oct
'21
4:47 a.m.
Mark Brown broonie@kernel.org 於 2021年10月8日 週五 下午8:51寫道：
On Fri, Oct 08, 2021 at 12:50:12PM +0800, cy_huang wrote:
+static const struct snd_kcontrol_new rt9120_snd_controls[] = {
SOC_SINGLE_TLV("MS Volume", RT9120_REG_MSVOL, 0, 2047, 1, digital_gain),SOC_SINGLE("SPK Gain", RT9120_REG_SPKGAIN, 0, 7, 0),Volume controls should end in Volume even if they don't have TLV information so applications know how to render them. I'll fix this up as I apply.
It's not linear mapping analog gain and cannot use the TLV as you said. Mappling table is listed like as below 0 -> 6dB 1 -> 8dB 2 -> 10dB 3 -> 12dB 4 -> 13dB 5 -> 14dB 6 -> 15dB 7 -> 16dB
Do I just need to change it to 'SPK Gain Volume' to present this control item? Or is there any table mapping for the nonlinear TLV information?