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Fri, 5 Mar 2021 17:34:50 +0000 Received: from mail1.cirrus.com (unknown [198.61.64.35]) by ediswmail.ad.cirrus.com (Postfix) with ESMTP id BD8FF11D9; Fri, 5 Mar 2021 17:34:49 +0000 (UTC) From: Lucas Tanure To: James Schulman , David Rhodes , Liam Girdwood , Mark Brown , Jaroslav Kysela , Takashi Iwai Subject: [PATCH v2 15/15] ASoC: cs42l42: Wait for PLL to lock before switching to it Date: Fri, 5 Mar 2021 17:34:42 +0000 Message-ID: <20210305173442.195740-16-tanureal@opensource.cirrus.com> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210305173442.195740-1-tanureal@opensource.cirrus.com> References: <20210305173442.195740-1-tanureal@opensource.cirrus.com> MIME-Version: 1.0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxscore=0 clxscore=1015 suspectscore=0 adultscore=0 lowpriorityscore=0 malwarescore=0 phishscore=0 spamscore=0 priorityscore=1501 mlxlogscore=957 bulkscore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2103050090 Cc: patches@opensource.cirrus.com, Richard Fitzgerald , alsa-devel@alsa-project.org, Lucas Tanure , linux-kernel@vger.kernel.org X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" From: Richard Fitzgerald The PLL should have locked before using it to supply MCLK. Signed-off-by: Richard Fitzgerald Signed-off-by: Lucas Tanure --- Changes in v2: - Lucas signed-off added sound/soc/codecs/cs42l42.c | 12 +++++++++++- sound/soc/codecs/cs42l42.h | 2 ++ 2 files changed, 13 insertions(+), 1 deletion(-) diff --git a/sound/soc/codecs/cs42l42.c b/sound/soc/codecs/cs42l42.c index 066068a7ffa0c..e1a7b41826360 100644 --- a/sound/soc/codecs/cs42l42.c +++ b/sound/soc/codecs/cs42l42.c @@ -862,6 +862,7 @@ static int cs42l42_mute_stream(struct snd_soc_dai *dai, int mute, int stream) struct cs42l42_private *cs42l42 = snd_soc_component_get_drvdata(component); unsigned int regval; u8 fullScaleVol; + int ret; if (mute) { /* Mute the headphone */ @@ -887,9 +888,18 @@ static int cs42l42_mute_stream(struct snd_soc_dai *dai, int mute, int stream) } else { if (!cs42l42->stream_use) { /* SCLK must be running before codec unmute */ - if ((cs42l42->bclk < 11289600) && (cs42l42->sclk < 11289600)) + if ((cs42l42->bclk < 11289600) && (cs42l42->sclk < 11289600)) { snd_soc_component_update_bits(component, CS42L42_PLL_CTL1, CS42L42_PLL_START_MASK, 1); + ret = regmap_read_poll_timeout(cs42l42->regmap, + CS42L42_PLL_LOCK_STATUS, + regval, + (regval & 1), + CS42L42_PLL_LOCK_POLL_US, + CS42L42_PLL_LOCK_TIMEOUT_US); + if (ret < 0) + dev_warn(component->dev, "PLL failed to lock: %d\n", ret); + } /* Mark SCLK as present, turn off internal oscillator */ regmap_multi_reg_write(cs42l42->regmap, cs42l42_to_sclk_seq, diff --git a/sound/soc/codecs/cs42l42.h b/sound/soc/codecs/cs42l42.h index 214cee762709d..36b763f0d1a06 100644 --- a/sound/soc/codecs/cs42l42.h +++ b/sound/soc/codecs/cs42l42.h @@ -756,6 +756,8 @@ #define CS42L42_NUM_SUPPLIES 5 #define CS42L42_BOOT_TIME_US 3000 #define CS42L42_CLOCK_SWITCH_DELAY_US 150 +#define CS42L42_PLL_LOCK_POLL_US 250 +#define CS42L42_PLL_LOCK_TIMEOUT_US 1250 static const char *const cs42l42_supply_names[CS42L42_NUM_SUPPLIES] = { "VA",