From 881b7bce0c250386680b49b637455d31238a4b30 Mon Sep 17 00:00:00 2001 From: Stefan Binding Date: Thu, 26 Oct 2023 16:05:54 +0100 Subject: [PATCH] ALSA: hda: cs35l41: Run boot process during resume callbacks During initial probe, after reset is asserted for the first time, the driver goes through a boot process to ensure the amp is ready to be used. This involves verifying a boot flag, as well as verifying the chip ids. This is necessary since it is possible for the amp to have been fully reset by the system suspend calls. Signed-off-by: Stefan Binding Link: https://lore.kernel.org/r/20231026150558.2105827-5-sbinding@opensource.cirrus.com Signed-off-by: Takashi Iwai --- sound/pci/hda/cs35l41_hda.c | 105 ++++++++++++++++++++++++------------ 1 file changed, 72 insertions(+), 33 deletions(-) diff --git a/sound/pci/hda/cs35l41_hda.c b/sound/pci/hda/cs35l41_hda.c index 1ac721085fb5..e787788c1be2 100644 --- a/sound/pci/hda/cs35l41_hda.c +++ b/sound/pci/hda/cs35l41_hda.c @@ -730,6 +730,34 @@ static int cs35l41_hda_channel_map(struct device *dev, unsigned int tx_num, unsi rx_slot); } +int cs35l41_verify_id(struct cs35l41_hda *cs35l41, unsigned int *regid, unsigned int *reg_revid) +{ + unsigned int mtl_revid, chipid; + int ret; + + ret = regmap_read(cs35l41->regmap, CS35L41_DEVID, regid); + if (ret) { + dev_err_probe(cs35l41->dev, ret, "Get Device ID failed\n"); + return ret; + } + + ret = regmap_read(cs35l41->regmap, CS35L41_REVID, reg_revid); + if (ret) { + dev_err_probe(cs35l41->dev, ret, "Get Revision ID failed\n"); + return ret; + } + + mtl_revid = *reg_revid & CS35L41_MTLREVID_MASK; + + chipid = (mtl_revid % 2) ? CS35L41R_CHIP_ID : CS35L41_CHIP_ID; + if (*regid != chipid) { + dev_err(cs35l41->dev, "CS35L41 Device ID (%X). Expected ID %X\n", *regid, chipid); + return -ENODEV; + } + + return 0; +} + static int cs35l41_ready_for_reset(struct cs35l41_hda *cs35l41) { int ret = 0; @@ -827,6 +855,30 @@ static int cs35l41_system_suspend(struct device *dev) return ret; } +static int cs35l41_wait_boot_done(struct cs35l41_hda *cs35l41) +{ + unsigned int int_status; + int ret; + + ret = regmap_read_poll_timeout(cs35l41->regmap, CS35L41_IRQ1_STATUS4, int_status, + int_status & CS35L41_OTP_BOOT_DONE, 1000, 100000); + if (ret) { + dev_err(cs35l41->dev, "Failed waiting for OTP_BOOT_DONE\n"); + return ret; + } + + ret = regmap_read(cs35l41->regmap, CS35L41_IRQ1_STATUS3, &int_status); + if (ret || (int_status & CS35L41_OTP_BOOT_ERR)) { + dev_err(cs35l41->dev, "OTP Boot status %x error\n", + int_status & CS35L41_OTP_BOOT_ERR); + if (!ret) + ret = -EIO; + return ret; + } + + return 0; +} + static int cs35l41_system_resume(struct device *dev) { struct cs35l41_hda *cs35l41 = dev_get_drvdata(dev); @@ -847,6 +899,14 @@ static int cs35l41_system_resume(struct device *dev) usleep_range(2000, 2100); + regcache_cache_only(cs35l41->regmap, false); + + ret = cs35l41_wait_boot_done(cs35l41); + if (ret) + return ret; + + regcache_cache_only(cs35l41->regmap, true); + ret = pm_runtime_force_resume(dev); if (ret) { dev_err(dev, "System Resume Failed: Unable to runtime resume: %d\n", ret); @@ -908,6 +968,7 @@ err: static int cs35l41_runtime_resume(struct device *dev) { struct cs35l41_hda *cs35l41 = dev_get_drvdata(dev); + unsigned int regid, reg_revid; int ret = 0; dev_dbg(cs35l41->dev, "Runtime Resume\n"); @@ -929,6 +990,10 @@ static int cs35l41_runtime_resume(struct device *dev) } } + ret = cs35l41_verify_id(cs35l41, ®id, ®_revid); + if (ret) + goto err; + /* Test key needs to be unlocked to allow the OTP settings to re-apply */ cs35l41_test_key_unlock(cs35l41->dev, cs35l41->regmap); ret = regcache_sync(cs35l41->regmap); @@ -941,6 +1006,8 @@ static int cs35l41_runtime_resume(struct device *dev) if (cs35l41->hw_cfg.bst_type == CS35L41_EXT_BOOST) cs35l41_init_boost(cs35l41->dev, cs35l41->regmap, &cs35l41->hw_cfg); + dev_dbg(cs35l41->dev, "CS35L41 Resumed (%x), Revision: %02X\n", regid, reg_revid); + err: mutex_unlock(&cs35l41->fw_mutex); @@ -1660,7 +1727,7 @@ put_physdev: int cs35l41_hda_probe(struct device *dev, const char *device_name, int id, int irq, struct regmap *regmap) { - unsigned int int_sts, regid, reg_revid, mtl_revid, chipid, int_status; + unsigned int regid, reg_revid; struct cs35l41_hda *cs35l41; int ret; @@ -1701,41 +1768,13 @@ int cs35l41_hda_probe(struct device *dev, const char *device_name, int id, int i usleep_range(2000, 2100); - ret = regmap_read_poll_timeout(cs35l41->regmap, CS35L41_IRQ1_STATUS4, int_status, - int_status & CS35L41_OTP_BOOT_DONE, 1000, 100000); - if (ret) { - dev_err_probe(cs35l41->dev, ret, "Failed waiting for OTP_BOOT_DONE\n"); + ret = cs35l41_wait_boot_done(cs35l41); + if (ret) goto err; - } - ret = regmap_read(cs35l41->regmap, CS35L41_IRQ1_STATUS3, &int_sts); - if (ret || (int_sts & CS35L41_OTP_BOOT_ERR)) { - dev_err_probe(cs35l41->dev, ret, "OTP Boot status %x error\n", - int_sts & CS35L41_OTP_BOOT_ERR); - ret = -EIO; + ret = cs35l41_verify_id(cs35l41, ®id, ®_revid); + if (ret) goto err; - } - - ret = regmap_read(cs35l41->regmap, CS35L41_DEVID, ®id); - if (ret) { - dev_err_probe(cs35l41->dev, ret, "Get Device ID failed\n"); - goto err; - } - - ret = regmap_read(cs35l41->regmap, CS35L41_REVID, ®_revid); - if (ret) { - dev_err_probe(cs35l41->dev, ret, "Get Revision ID failed\n"); - goto err; - } - - mtl_revid = reg_revid & CS35L41_MTLREVID_MASK; - - chipid = (mtl_revid % 2) ? CS35L41R_CHIP_ID : CS35L41_CHIP_ID; - if (regid != chipid) { - dev_err(cs35l41->dev, "CS35L41 Device ID (%X). Expected ID %X\n", regid, chipid); - ret = -ENODEV; - goto err; - } ret = cs35l41_test_key_unlock(cs35l41->dev, cs35l41->regmap); if (ret)