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ASoC: wm_hubs: Clamp inputs to VMID while we ramp
Reduces the amount of time taken to stabilise them. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
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2 changed files with 19 additions and 0 deletions
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@ -31,6 +31,7 @@
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#define WM8993_GPIO_CTRL_1 0x12
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#define WM8993_GPIO1 0x13
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#define WM8993_IRQ_DEBOUNCE 0x14
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#define WM8993_INPUTS_CLAMP_REG 0x15
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#define WM8993_GPIOCTRL_2 0x16
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#define WM8993_GPIO_POL 0x17
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#define WM8993_LEFT_LINE_INPUT_1_2_VOLUME 0x18
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@ -655,6 +656,14 @@
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#define WM8993_GPIO1_DB_SHIFT 0 /* GPIO1_DB */
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#define WM8993_GPIO1_DB_WIDTH 1 /* GPIO1_DB */
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/*
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* R21 (0x15) - Inputs Clamp
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*/
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#define WM8993_INPUTS_CLAMP 0x0040 /* INPUTS_CLAMP */
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#define WM8993_INPUTS_CLAMP_MASK 0x0040 /* INPUTS_CLAMP */
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#define WM8993_INPUTS_CLAMP_SHIFT 7 /* INPUTS_CLAMP */
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#define WM8993_INPUTS_CLAMP_WIDTH 1 /* INPUTS_CLAMP */
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/*
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* R22 (0x16) - GPIOCTRL 2
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*/
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@ -1040,6 +1040,12 @@ void wm_hubs_set_bias_level(struct snd_soc_codec *codec,
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int val;
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switch (level) {
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case SND_SOC_BIAS_STANDBY:
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/* Clamp the inputs to VMID while we ramp to charge caps */
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snd_soc_update_bits(codec, WM8993_INPUTS_CLAMP_REG,
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WM8993_INPUTS_CLAMP, WM8993_INPUTS_CLAMP);
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break;
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case SND_SOC_BIAS_ON:
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/* Turn off any unneded single ended outputs */
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val = 0;
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@ -1067,6 +1073,10 @@ void wm_hubs_set_bias_level(struct snd_soc_codec *codec,
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!hubs->lineout2n_ena && !hubs->lineout2p_ena)
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snd_soc_update_bits(codec, WM8993_ANTIPOP1,
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WM8993_LINEOUT_VMID_BUF_ENA, 0);
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/* Remove the input clamps */
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snd_soc_update_bits(codec, WM8993_INPUTS_CLAMP_REG,
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WM8993_INPUTS_CLAMP, 0);
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break;
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default:
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