From 11cef5f07ba0e925af432fc3229fb87585ccccf0 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Fri, 26 Nov 2010 17:23:44 +0000 Subject: [PATCH] ASoC: Use DC servo startup mode when not doing DCS correction Devices which do not have a DCS correction applied can use the explicit DC servo startup mode for optimal startup performance. This most immediately affects the WM8958. Signed-off-by: Mark Brown Acked-by: Liam Girdwood --- sound/soc/codecs/wm_hubs.c | 20 ++++++++++++++------ 1 file changed, 14 insertions(+), 6 deletions(-) diff --git a/sound/soc/codecs/wm_hubs.c b/sound/soc/codecs/wm_hubs.c index e7a19d6..b24ba9f 100644 --- a/sound/soc/codecs/wm_hubs.c +++ b/sound/soc/codecs/wm_hubs.c @@ -105,12 +105,20 @@ static void calibrate_dc_servo(struct snd_soc_codec *codec) return; } - /* Set for 32 series updates */ - snd_soc_update_bits(codec, WM8993_DC_SERVO_1, - WM8993_DCS_SERIES_NO_01_MASK, - 32 << WM8993_DCS_SERIES_NO_01_SHIFT); - wait_for_dc_servo(codec, - WM8993_DCS_TRIG_SERIES_0 | WM8993_DCS_TRIG_SERIES_1); + /* Devices not using a DCS code correction have startup mode */ + if (hubs->dcs_codes) { + /* Set for 32 series updates */ + snd_soc_update_bits(codec, WM8993_DC_SERVO_1, + WM8993_DCS_SERIES_NO_01_MASK, + 32 << WM8993_DCS_SERIES_NO_01_SHIFT); + wait_for_dc_servo(codec, + WM8993_DCS_TRIG_SERIES_0 | + WM8993_DCS_TRIG_SERIES_1); + } else { + wait_for_dc_servo(codec, + WM8993_DCS_TRIG_STARTUP_0 | + WM8993_DCS_TRIG_STARTUP_1); + } /* Different chips in the family support different readback * methods. -- 2.7.4