From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Brown Subject: [PATCH 4/4] ASoC: Use DC servo startup mode when not doing DCS correction Date: Fri, 26 Nov 2010 17:23:44 +0000 Message-ID: <1290792224-21758-4-git-send-email-broonie@opensource.wolfsonmicro.com> References: <1290792224-21758-1-git-send-email-broonie@opensource.wolfsonmicro.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from opensource2.wolfsonmicro.com (opensource.wolfsonmicro.com [80.75.67.52]) by alsa0.perex.cz (Postfix) with ESMTP id 70B4A243E9 for ; Fri, 26 Nov 2010 18:23:50 +0100 (CET) In-Reply-To: <1290792224-21758-1-git-send-email-broonie@opensource.wolfsonmicro.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: alsa-devel-bounces@alsa-project.org Errors-To: alsa-devel-bounces@alsa-project.org To: Liam Girdwood Cc: alsa-devel@alsa-project.org, patches@opensource.wolfsonmicro.com, Mark Brown List-Id: alsa-devel@alsa-project.org 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 --- sound/soc/codecs/wm_hubs.c | 20 ++++++++++++++------ 1 files 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. -- 1.7.1