[PATCH v7 0/4] Add CS35L41 shared boost feature

[PATCH v7 0/4] Add CS35L41 shared boost feature

[Lucas Tanure]

Valve's Steam Deck uses CS35L41 in shared boost mode, where both speakers
share the boost circuit.
Add this support in the shared lib, but for now, shared boost is not
supported in HDA systems as would require BIOS changes.

Based on David Rhodes shared boost patches.

Also, fix boost config overwriting in IRQ found in the review and do a
small refactor of the code.

Changes from V6:
 - Fix TX/RX bits in passive amp

Changes from V5:
 - Improved documentation from Cirrrus
 - All amps use MDSCYN for boost source
 - Active amp has TX and RX enabled

Changes from V4:
 - Fix Document subject

Changes from V3:
 - Fix wrong code sent
 - Fix ISO C90 mixed declarations and code 

Changes from V2:
 - Drop External boost without VSPK Documentation
 - Move Shared boost to use values 2 and 3
 - Revert back to reg_sequence but reading the value first and only update
the necessary bits
 - Fix bug found by Intel kernel Test Robot

Changes from V1:
 - Fix Documentation patch subject
 - New patch for External boost without VSPK Documentation
 - New patch to fix boost IRQ overwriting issue
 - New patch to refactor IRQ release error code
 - reinit_completion on pcm_startup
 - fix DRE switch overwriting
 - return IRQ_HANDLED in PLL_LOCK case

Lucas Tanure (4):
  ASoC: cs35l41: Only disable internal boost
  ASoC: cs35l41: Refactor error release code
  ALSA: cs35l41: Add shared boost feature
  ASoC: dt-bindings: cirrus,cs35l41: Document CS35l41 shared boost

 .../bindings/sound/cirrus,cs35l41.yaml        |  10 +-
 include/sound/cs35l41.h                       |  13 +-
 sound/pci/hda/cs35l41_hda.c                   |   6 +-
 sound/soc/codecs/cs35l41-lib.c                |  73 +++++++++-
 sound/soc/codecs/cs35l41.c                    | 125 +++++++++---------
 sound/soc/codecs/cs35l41.h                    |   1 +
 6 files changed, 157 insertions(+), 71 deletions(-)

-- 
2.39.2

[PATCH v7 1/4] ASoC: cs35l41: Only disable internal boost

[Lucas Tanure]

In error situations, only the internal boost case should be disabled and
re-enabled.
Also, for other boost cases re-enabling the boost to the default internal
boost config is incorrect.

Fixes: 6450ef559056 ("ASoC: cs35l41: CS35L41 Boosted Smart Amplifier")
Signed-off-by: Lucas Tanure <lucas.tanure@collabora.com>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
---
 sound/soc/codecs/cs35l41.c | 34 +++++++++++++++++++---------------
 1 file changed, 19 insertions(+), 15 deletions(-)

diff --git a/sound/soc/codecs/cs35l41.c b/sound/soc/codecs/cs35l41.c
index c223d83e02cf..f2b5032daa6a 100644
--- a/sound/soc/codecs/cs35l41.c
+++ b/sound/soc/codecs/cs35l41.c
@@ -356,6 +356,19 @@ static const struct snd_kcontrol_new cs35l41_aud_controls[] = {
 	WM_ADSP_FW_CONTROL("DSP1", 0),
 };
 
+static void cs35l41_boost_enable(struct cs35l41_private *cs35l41, unsigned int enable)
+{
+	switch (cs35l41->hw_cfg.bst_type) {
+	case CS35L41_INT_BOOST:
+		enable = enable ? CS35L41_BST_EN_DEFAULT : CS35L41_BST_DIS_FET_OFF;
+		regmap_update_bits(cs35l41->regmap, CS35L41_PWR_CTRL2, CS35L41_BST_EN_MASK,
+				enable << CS35L41_BST_EN_SHIFT);
+		break;
+	default:
+		break;
+	}
+}
+
 static irqreturn_t cs35l41_irq(int irq, void *data)
 {
 	struct cs35l41_private *cs35l41 = data;
@@ -431,8 +444,7 @@ static irqreturn_t cs35l41_irq(int irq, void *data)
 
 	if (status[0] & CS35L41_BST_OVP_ERR) {
 		dev_crit_ratelimited(cs35l41->dev, "VBST Over Voltage error\n");
-		regmap_update_bits(cs35l41->regmap, CS35L41_PWR_CTRL2,
-				   CS35L41_BST_EN_MASK, 0);
+		cs35l41_boost_enable(cs35l41, 0);
 		regmap_write(cs35l41->regmap, CS35L41_IRQ1_STATUS1,
 			     CS35L41_BST_OVP_ERR);
 		regmap_write(cs35l41->regmap, CS35L41_PROTECT_REL_ERR_IGN, 0);
@@ -441,16 +453,13 @@ static irqreturn_t cs35l41_irq(int irq, void *data)
 				   CS35L41_BST_OVP_ERR_RLS);
 		regmap_update_bits(cs35l41->regmap, CS35L41_PROTECT_REL_ERR_IGN,
 				   CS35L41_BST_OVP_ERR_RLS, 0);
-		regmap_update_bits(cs35l41->regmap, CS35L41_PWR_CTRL2,
-				   CS35L41_BST_EN_MASK,
-				   CS35L41_BST_EN_DEFAULT << CS35L41_BST_EN_SHIFT);
+		cs35l41_boost_enable(cs35l41, 1);
 		ret = IRQ_HANDLED;
 	}
 
 	if (status[0] & CS35L41_BST_DCM_UVP_ERR) {
 		dev_crit_ratelimited(cs35l41->dev, "DCM VBST Under Voltage Error\n");
-		regmap_update_bits(cs35l41->regmap, CS35L41_PWR_CTRL2,
-				   CS35L41_BST_EN_MASK, 0);
+		cs35l41_boost_enable(cs35l41, 0);
 		regmap_write(cs35l41->regmap, CS35L41_IRQ1_STATUS1,
 			     CS35L41_BST_DCM_UVP_ERR);
 		regmap_write(cs35l41->regmap, CS35L41_PROTECT_REL_ERR_IGN, 0);
@@ -459,16 +468,13 @@ static irqreturn_t cs35l41_irq(int irq, void *data)
 				   CS35L41_BST_UVP_ERR_RLS);
 		regmap_update_bits(cs35l41->regmap, CS35L41_PROTECT_REL_ERR_IGN,
 				   CS35L41_BST_UVP_ERR_RLS, 0);
-		regmap_update_bits(cs35l41->regmap, CS35L41_PWR_CTRL2,
-				   CS35L41_BST_EN_MASK,
-				   CS35L41_BST_EN_DEFAULT << CS35L41_BST_EN_SHIFT);
+		cs35l41_boost_enable(cs35l41, 1);
 		ret = IRQ_HANDLED;
 	}
 
 	if (status[0] & CS35L41_BST_SHORT_ERR) {
 		dev_crit_ratelimited(cs35l41->dev, "LBST error: powering off!\n");
-		regmap_update_bits(cs35l41->regmap, CS35L41_PWR_CTRL2,
-				   CS35L41_BST_EN_MASK, 0);
+		cs35l41_boost_enable(cs35l41, 0);
 		regmap_write(cs35l41->regmap, CS35L41_IRQ1_STATUS1,
 			     CS35L41_BST_SHORT_ERR);
 		regmap_write(cs35l41->regmap, CS35L41_PROTECT_REL_ERR_IGN, 0);
@@ -477,9 +483,7 @@ static irqreturn_t cs35l41_irq(int irq, void *data)
 				   CS35L41_BST_SHORT_ERR_RLS);
 		regmap_update_bits(cs35l41->regmap, CS35L41_PROTECT_REL_ERR_IGN,
 				   CS35L41_BST_SHORT_ERR_RLS, 0);
-		regmap_update_bits(cs35l41->regmap, CS35L41_PWR_CTRL2,
-				   CS35L41_BST_EN_MASK,
-				   CS35L41_BST_EN_DEFAULT << CS35L41_BST_EN_SHIFT);
+		cs35l41_boost_enable(cs35l41, 1);
 		ret = IRQ_HANDLED;
 	}
 
-- 
2.39.2

[PATCH v7 2/4] ASoC: cs35l41: Refactor error release code

[Lucas Tanure]

Add cs35l41_error_release function to handle error release sequences.

Signed-off-by: Lucas Tanure <lucas.tanure@collabora.com>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
---
 sound/soc/codecs/cs35l41.c | 64 ++++++++++----------------------------
 1 file changed, 16 insertions(+), 48 deletions(-)

diff --git a/sound/soc/codecs/cs35l41.c b/sound/soc/codecs/cs35l41.c
index f2b5032daa6a..c006364e5335 100644
--- a/sound/soc/codecs/cs35l41.c
+++ b/sound/soc/codecs/cs35l41.c
@@ -369,6 +369,16 @@ static void cs35l41_boost_enable(struct cs35l41_private *cs35l41, unsigned int e
 	}
 }
 
+
+static void cs35l41_error_release(struct cs35l41_private *cs35l41, unsigned int irq_err_bit,
+				  unsigned int rel_err_bit)
+{
+	regmap_write(cs35l41->regmap, CS35L41_IRQ1_STATUS1, irq_err_bit);
+	regmap_write(cs35l41->regmap, CS35L41_PROTECT_REL_ERR_IGN, 0);
+	regmap_update_bits(cs35l41->regmap, CS35L41_PROTECT_REL_ERR_IGN, rel_err_bit, rel_err_bit);
+	regmap_update_bits(cs35l41->regmap, CS35L41_PROTECT_REL_ERR_IGN, rel_err_bit, 0);
+}
+
 static irqreturn_t cs35l41_irq(int irq, void *data)
 {
 	struct cs35l41_private *cs35l41 = data;
@@ -405,54 +415,26 @@ static irqreturn_t cs35l41_irq(int irq, void *data)
 	 */
 	if (status[0] & CS35L41_AMP_SHORT_ERR) {
 		dev_crit_ratelimited(cs35l41->dev, "Amp short error\n");
-		regmap_write(cs35l41->regmap, CS35L41_IRQ1_STATUS1,
-			     CS35L41_AMP_SHORT_ERR);
-		regmap_write(cs35l41->regmap, CS35L41_PROTECT_REL_ERR_IGN, 0);
-		regmap_update_bits(cs35l41->regmap, CS35L41_PROTECT_REL_ERR_IGN,
-				   CS35L41_AMP_SHORT_ERR_RLS,
-				   CS35L41_AMP_SHORT_ERR_RLS);
-		regmap_update_bits(cs35l41->regmap, CS35L41_PROTECT_REL_ERR_IGN,
-				   CS35L41_AMP_SHORT_ERR_RLS, 0);
+		cs35l41_error_release(cs35l41, CS35L41_AMP_SHORT_ERR, CS35L41_AMP_SHORT_ERR_RLS);
 		ret = IRQ_HANDLED;
 	}
 
 	if (status[0] & CS35L41_TEMP_WARN) {
 		dev_crit_ratelimited(cs35l41->dev, "Over temperature warning\n");
-		regmap_write(cs35l41->regmap, CS35L41_IRQ1_STATUS1,
-			     CS35L41_TEMP_WARN);
-		regmap_write(cs35l41->regmap, CS35L41_PROTECT_REL_ERR_IGN, 0);
-		regmap_update_bits(cs35l41->regmap, CS35L41_PROTECT_REL_ERR_IGN,
-				   CS35L41_TEMP_WARN_ERR_RLS,
-				   CS35L41_TEMP_WARN_ERR_RLS);
-		regmap_update_bits(cs35l41->regmap, CS35L41_PROTECT_REL_ERR_IGN,
-				   CS35L41_TEMP_WARN_ERR_RLS, 0);
+		cs35l41_error_release(cs35l41, CS35L41_TEMP_WARN, CS35L41_TEMP_WARN_ERR_RLS);
 		ret = IRQ_HANDLED;
 	}
 
 	if (status[0] & CS35L41_TEMP_ERR) {
 		dev_crit_ratelimited(cs35l41->dev, "Over temperature error\n");
-		regmap_write(cs35l41->regmap, CS35L41_IRQ1_STATUS1,
-			     CS35L41_TEMP_ERR);
-		regmap_write(cs35l41->regmap, CS35L41_PROTECT_REL_ERR_IGN, 0);
-		regmap_update_bits(cs35l41->regmap, CS35L41_PROTECT_REL_ERR_IGN,
-				   CS35L41_TEMP_ERR_RLS,
-				   CS35L41_TEMP_ERR_RLS);
-		regmap_update_bits(cs35l41->regmap, CS35L41_PROTECT_REL_ERR_IGN,
-				   CS35L41_TEMP_ERR_RLS, 0);
+		cs35l41_error_release(cs35l41, CS35L41_TEMP_ERR, CS35L41_TEMP_ERR_RLS);
 		ret = IRQ_HANDLED;
 	}
 
 	if (status[0] & CS35L41_BST_OVP_ERR) {
 		dev_crit_ratelimited(cs35l41->dev, "VBST Over Voltage error\n");
 		cs35l41_boost_enable(cs35l41, 0);
-		regmap_write(cs35l41->regmap, CS35L41_IRQ1_STATUS1,
-			     CS35L41_BST_OVP_ERR);
-		regmap_write(cs35l41->regmap, CS35L41_PROTECT_REL_ERR_IGN, 0);
-		regmap_update_bits(cs35l41->regmap, CS35L41_PROTECT_REL_ERR_IGN,
-				   CS35L41_BST_OVP_ERR_RLS,
-				   CS35L41_BST_OVP_ERR_RLS);
-		regmap_update_bits(cs35l41->regmap, CS35L41_PROTECT_REL_ERR_IGN,
-				   CS35L41_BST_OVP_ERR_RLS, 0);
+		cs35l41_error_release(cs35l41, CS35L41_BST_OVP_ERR, CS35L41_BST_OVP_ERR_RLS);
 		cs35l41_boost_enable(cs35l41, 1);
 		ret = IRQ_HANDLED;
 	}
@@ -460,14 +442,7 @@ static irqreturn_t cs35l41_irq(int irq, void *data)
 	if (status[0] & CS35L41_BST_DCM_UVP_ERR) {
 		dev_crit_ratelimited(cs35l41->dev, "DCM VBST Under Voltage Error\n");
 		cs35l41_boost_enable(cs35l41, 0);
-		regmap_write(cs35l41->regmap, CS35L41_IRQ1_STATUS1,
-			     CS35L41_BST_DCM_UVP_ERR);
-		regmap_write(cs35l41->regmap, CS35L41_PROTECT_REL_ERR_IGN, 0);
-		regmap_update_bits(cs35l41->regmap, CS35L41_PROTECT_REL_ERR_IGN,
-				   CS35L41_BST_UVP_ERR_RLS,
-				   CS35L41_BST_UVP_ERR_RLS);
-		regmap_update_bits(cs35l41->regmap, CS35L41_PROTECT_REL_ERR_IGN,
-				   CS35L41_BST_UVP_ERR_RLS, 0);
+		cs35l41_error_release(cs35l41, CS35L41_BST_DCM_UVP_ERR, CS35L41_BST_UVP_ERR_RLS);
 		cs35l41_boost_enable(cs35l41, 1);
 		ret = IRQ_HANDLED;
 	}
@@ -475,14 +450,7 @@ static irqreturn_t cs35l41_irq(int irq, void *data)
 	if (status[0] & CS35L41_BST_SHORT_ERR) {
 		dev_crit_ratelimited(cs35l41->dev, "LBST error: powering off!\n");
 		cs35l41_boost_enable(cs35l41, 0);
-		regmap_write(cs35l41->regmap, CS35L41_IRQ1_STATUS1,
-			     CS35L41_BST_SHORT_ERR);
-		regmap_write(cs35l41->regmap, CS35L41_PROTECT_REL_ERR_IGN, 0);
-		regmap_update_bits(cs35l41->regmap, CS35L41_PROTECT_REL_ERR_IGN,
-				   CS35L41_BST_SHORT_ERR_RLS,
-				   CS35L41_BST_SHORT_ERR_RLS);
-		regmap_update_bits(cs35l41->regmap, CS35L41_PROTECT_REL_ERR_IGN,
-				   CS35L41_BST_SHORT_ERR_RLS, 0);
+		cs35l41_error_release(cs35l41, CS35L41_BST_SHORT_ERR, CS35L41_BST_SHORT_ERR_RLS);
 		cs35l41_boost_enable(cs35l41, 1);
 		ret = IRQ_HANDLED;
 	}
-- 
2.39.2

[PATCH v7 3/4] ALSA: cs35l41: Add shared boost feature

[Lucas Tanure]

Shared boost allows two amplifiers to share a single boost circuit by
communicating on the MDSYNC bus.
The passive amplifier does not control the boost and receives data from
the active amplifier.

Shared Boost is not supported in HDA Systems.
Based on David Rhodes shared boost patches.

Signed-off-by: Lucas Tanure <lucas.tanure@collabora.com>
---
 include/sound/cs35l41.h        | 13 +++++-
 sound/pci/hda/cs35l41_hda.c    |  6 +--
 sound/soc/codecs/cs35l41-lib.c | 73 +++++++++++++++++++++++++++++++++-
 sound/soc/codecs/cs35l41.c     | 27 ++++++++++++-
 sound/soc/codecs/cs35l41.h     |  1 +
 5 files changed, 113 insertions(+), 7 deletions(-)

diff --git a/include/sound/cs35l41.h b/include/sound/cs35l41.h
index 9ac5918269a5..7239d943942c 100644
--- a/include/sound/cs35l41.h
+++ b/include/sound/cs35l41.h
@@ -11,6 +11,7 @@
 #define __CS35L41_H
 
 #include <linux/regmap.h>
+#include <linux/completion.h>
 #include <linux/firmware/cirrus/cs_dsp.h>
 
 #define CS35L41_FIRSTREG		0x00000000
@@ -677,6 +678,7 @@
 
 #define CS35L36_PUP_DONE_IRQ_UNMASK	0x5F
 #define CS35L36_PUP_DONE_IRQ_MASK	0xBF
+#define CS35L41_SYNC_EN_MASK		BIT(8)
 
 #define CS35L41_AMP_SHORT_ERR		0x80000000
 #define CS35L41_BST_SHORT_ERR		0x0100
@@ -686,6 +688,7 @@
 #define CS35L41_BST_DCM_UVP_ERR		0x80
 #define CS35L41_OTP_BOOT_DONE		0x02
 #define CS35L41_PLL_UNLOCK		0x10
+#define CS35L41_PLL_LOCK		BIT(1)
 #define CS35L41_OTP_BOOT_ERR		0x80000000
 
 #define CS35L41_AMP_SHORT_ERR_RLS	0x02
@@ -705,6 +708,8 @@
 #define CS35L41_INT1_MASK_DEFAULT	0x7FFCFE3F
 #define CS35L41_INT1_UNMASK_PUP		0xFEFFFFFF
 #define CS35L41_INT1_UNMASK_PDN		0xFF7FFFFF
+#define CS35L41_INT3_PLL_LOCK_SHIFT	1
+#define CS35L41_INT3_PLL_LOCK_MASK	BIT(CS35L41_INT3_PLL_LOCK_SHIFT)
 
 #define CS35L41_GPIO_DIR_MASK		0x80000000
 #define CS35L41_GPIO_DIR_SHIFT		31
@@ -742,6 +747,11 @@
 enum cs35l41_boost_type {
 	CS35L41_INT_BOOST,
 	CS35L41_EXT_BOOST,
+	CS35L41_SHD_BOOST_ACTV,
+	CS35L41_SHD_BOOST_PASS,
+
+	// Not present in Binding Documentation, so no system should use this value.
+	// This value is only used in CLSA0100 Laptop
 	CS35L41_EXT_BOOST_NO_VSPK_SWITCH,
 };
 
@@ -891,6 +901,7 @@ int cs35l41_exit_hibernate(struct device *dev, struct regmap *regmap);
 int cs35l41_init_boost(struct device *dev, struct regmap *regmap,
 		       struct cs35l41_hw_cfg *hw_cfg);
 bool cs35l41_safe_reset(struct regmap *regmap, enum cs35l41_boost_type b_type);
-int cs35l41_global_enable(struct regmap *regmap, enum cs35l41_boost_type b_type, int enable);
+int cs35l41_global_enable(struct regmap *regmap, enum cs35l41_boost_type b_type, int enable,
+			  struct completion *pll_lock);
 
 #endif /* __CS35L41_H */
diff --git a/sound/pci/hda/cs35l41_hda.c b/sound/pci/hda/cs35l41_hda.c
index 75020edd39e7..b5210abb5141 100644
--- a/sound/pci/hda/cs35l41_hda.c
+++ b/sound/pci/hda/cs35l41_hda.c
@@ -514,13 +514,13 @@ static void cs35l41_hda_playback_hook(struct device *dev, int action)
 		break;
 	case HDA_GEN_PCM_ACT_PREPARE:
 		mutex_lock(&cs35l41->fw_mutex);
-		ret = cs35l41_global_enable(reg, cs35l41->hw_cfg.bst_type, 1);
+		ret = cs35l41_global_enable(reg, cs35l41->hw_cfg.bst_type, 1, NULL);
 		mutex_unlock(&cs35l41->fw_mutex);
 		break;
 	case HDA_GEN_PCM_ACT_CLEANUP:
 		mutex_lock(&cs35l41->fw_mutex);
 		regmap_multi_reg_write(reg, cs35l41_hda_mute, ARRAY_SIZE(cs35l41_hda_mute));
-		ret = cs35l41_global_enable(reg, cs35l41->hw_cfg.bst_type, 0);
+		ret = cs35l41_global_enable(reg, cs35l41->hw_cfg.bst_type, 0, NULL);
 		mutex_unlock(&cs35l41->fw_mutex);
 		break;
 	case HDA_GEN_PCM_ACT_CLOSE:
@@ -672,7 +672,7 @@ static int cs35l41_runtime_suspend(struct device *dev)
 	if (cs35l41->playback_started) {
 		regmap_multi_reg_write(cs35l41->regmap, cs35l41_hda_mute,
 				       ARRAY_SIZE(cs35l41_hda_mute));
-		cs35l41_global_enable(cs35l41->regmap, cs35l41->hw_cfg.bst_type, 0);
+		cs35l41_global_enable(cs35l41->regmap, cs35l41->hw_cfg.bst_type, 0, NULL);
 		regmap_update_bits(cs35l41->regmap, CS35L41_PWR_CTRL2,
 				   CS35L41_AMP_EN_MASK, 0 << CS35L41_AMP_EN_SHIFT);
 		if (cs35l41->hw_cfg.bst_type == CS35L41_EXT_BOOST)
diff --git a/sound/soc/codecs/cs35l41-lib.c b/sound/soc/codecs/cs35l41-lib.c
index 04be71435491..8538e2871c5f 100644
--- a/sound/soc/codecs/cs35l41-lib.c
+++ b/sound/soc/codecs/cs35l41-lib.c
@@ -1114,12 +1114,31 @@ static const struct reg_sequence cs35l41_reset_to_safe[] = {
 	{ 0x00000040,			0x00000033 },
 };
 
+static const struct reg_sequence cs35l41_actv_seq[] = {
+	/* SYNC_BST_CTL_RX_EN = 1; SYNC_BST_CTL_TX_EN = 1 */
+	{CS35L41_MDSYNC_EN,        0x00003000},
+	/* BST_CTL_SEL = MDSYNC */
+	{CS35L41_BSTCVRT_VCTRL2,    0x00000002},
+};
+
+static const struct reg_sequence cs35l41_pass_seq[] = {
+	/* SYNC_BST_CTL_RX_EN = 0; SYNC_BST_CTL_TX_EN = 1 */
+	{CS35L41_MDSYNC_EN,        0x00001000},
+	/* BST_EN = 0 */
+	{CS35L41_PWR_CTRL2,        0x00003300},
+	/* BST_CTL_SEL = MDSYNC */
+	{CS35L41_BSTCVRT_VCTRL2,    0x00000002},
+};
+
 int cs35l41_init_boost(struct device *dev, struct regmap *regmap,
 		       struct cs35l41_hw_cfg *hw_cfg)
 {
 	int ret;
 
 	switch (hw_cfg->bst_type) {
+	case CS35L41_SHD_BOOST_ACTV:
+		regmap_multi_reg_write(regmap, cs35l41_actv_seq, ARRAY_SIZE(cs35l41_actv_seq));
+		fallthrough;
 	case CS35L41_INT_BOOST:
 		ret = cs35l41_boost_config(dev, regmap, hw_cfg->bst_ind,
 					   hw_cfg->bst_cap, hw_cfg->bst_ipk);
@@ -1138,6 +1157,10 @@ int cs35l41_init_boost(struct device *dev, struct regmap *regmap,
 		ret = regmap_update_bits(regmap, CS35L41_PWR_CTRL2, CS35L41_BST_EN_MASK,
 					 CS35L41_BST_DIS_FET_OFF << CS35L41_BST_EN_SHIFT);
 		break;
+	case CS35L41_SHD_BOOST_PASS:
+		ret = regmap_multi_reg_write(regmap, cs35l41_pass_seq,
+					     ARRAY_SIZE(cs35l41_pass_seq));
+		break;
 	default:
 		dev_err(dev, "Boost type %d not supported\n", hw_cfg->bst_type);
 		ret = -EINVAL;
@@ -1165,11 +1188,59 @@ bool cs35l41_safe_reset(struct regmap *regmap, enum cs35l41_boost_type b_type)
 }
 EXPORT_SYMBOL_GPL(cs35l41_safe_reset);
 
-int cs35l41_global_enable(struct regmap *regmap, enum cs35l41_boost_type b_type, int enable)
+int cs35l41_global_enable(struct regmap *regmap, enum cs35l41_boost_type b_type, int enable,
+			  struct completion *pll_lock)
 {
 	int ret;
+	unsigned int gpio1_func, pad_control, pwr_ctrl1, pwr_ctrl3;
+	struct reg_sequence cs35l41_mdsync_down_seq[] = {
+		{CS35L41_PWR_CTRL3,		0},
+		{CS35L41_GPIO_PAD_CONTROL,	0},
+		{CS35L41_PWR_CTRL1,		0, 3000},
+	};
+	struct reg_sequence cs35l41_mdsync_up_seq[] = {
+		{CS35L41_PWR_CTRL3,	0},
+		{CS35L41_PWR_CTRL1,	0x00000000, 3000},
+		{CS35L41_PWR_CTRL1,	0x00000001, 3000},
+	};
 
 	switch (b_type) {
+	case CS35L41_SHD_BOOST_ACTV:
+	case CS35L41_SHD_BOOST_PASS:
+		regmap_read(regmap, CS35L41_PWR_CTRL3, &pwr_ctrl3);
+		regmap_read(regmap, CS35L41_GPIO_PAD_CONTROL, &pad_control);
+
+		pwr_ctrl3 &= ~CS35L41_SYNC_EN_MASK;
+		pwr_ctrl1 = enable << CS35L41_GLOBAL_EN_SHIFT;
+
+		gpio1_func = enable ? CS35L41_GPIO1_MDSYNC : CS35L41_GPIO1_HIZ;
+		gpio1_func <<= CS35L41_GPIO1_CTRL_SHIFT;
+
+		pad_control &= ~CS35L41_GPIO1_CTRL_MASK;
+		pad_control |= gpio1_func & CS35L41_GPIO1_CTRL_MASK;
+
+		cs35l41_mdsync_down_seq[0].def = pwr_ctrl3;
+		cs35l41_mdsync_down_seq[1].def = pad_control;
+		cs35l41_mdsync_down_seq[2].def = pwr_ctrl1;
+		ret = regmap_multi_reg_write(regmap, cs35l41_mdsync_down_seq,
+					     ARRAY_SIZE(cs35l41_mdsync_down_seq));
+		if (!enable)
+			break;
+
+		if (!pll_lock)
+			return -EINVAL;
+
+		ret = wait_for_completion_timeout(pll_lock, msecs_to_jiffies(1000));
+		if (ret == 0) {
+			ret = -ETIMEDOUT;
+		} else {
+			regmap_read(regmap, CS35L41_PWR_CTRL3, &pwr_ctrl3);
+			pwr_ctrl3 |= CS35L41_SYNC_EN_MASK;
+			cs35l41_mdsync_up_seq[0].def = pwr_ctrl3;
+			ret = regmap_multi_reg_write(regmap, cs35l41_mdsync_up_seq,
+						     ARRAY_SIZE(cs35l41_mdsync_up_seq));
+		}
+		break;
 	case CS35L41_INT_BOOST:
 		ret = regmap_update_bits(regmap, CS35L41_PWR_CTRL1, CS35L41_GLOBAL_EN_MASK,
 					 enable << CS35L41_GLOBAL_EN_SHIFT);
diff --git a/sound/soc/codecs/cs35l41.c b/sound/soc/codecs/cs35l41.c
index c006364e5335..1624510d09c0 100644
--- a/sound/soc/codecs/cs35l41.c
+++ b/sound/soc/codecs/cs35l41.c
@@ -360,6 +360,7 @@ static void cs35l41_boost_enable(struct cs35l41_private *cs35l41, unsigned int e
 {
 	switch (cs35l41->hw_cfg.bst_type) {
 	case CS35L41_INT_BOOST:
+	case CS35L41_SHD_BOOST_ACTV:
 		enable = enable ? CS35L41_BST_EN_DEFAULT : CS35L41_BST_DIS_FET_OFF;
 		regmap_update_bits(cs35l41->regmap, CS35L41_PWR_CTRL2, CS35L41_BST_EN_MASK,
 				enable << CS35L41_BST_EN_SHIFT);
@@ -455,6 +456,12 @@ static irqreturn_t cs35l41_irq(int irq, void *data)
 		ret = IRQ_HANDLED;
 	}
 
+	if (status[2] & CS35L41_PLL_LOCK) {
+		regmap_write(cs35l41->regmap, CS35L41_IRQ1_STATUS3, CS35L41_PLL_LOCK);
+		complete(&cs35l41->pll_lock);
+		ret = IRQ_HANDLED;
+	}
+
 done:
 	pm_runtime_mark_last_busy(cs35l41->dev);
 	pm_runtime_put_autosuspend(cs35l41->dev);
@@ -492,10 +499,12 @@ static int cs35l41_main_amp_event(struct snd_soc_dapm_widget *w,
 						cs35l41_pup_patch,
 						ARRAY_SIZE(cs35l41_pup_patch));
 
-		cs35l41_global_enable(cs35l41->regmap, cs35l41->hw_cfg.bst_type, 1);
+		cs35l41_global_enable(cs35l41->regmap, cs35l41->hw_cfg.bst_type, 1,
+				      &cs35l41->pll_lock);
 		break;
 	case SND_SOC_DAPM_POST_PMD:
-		cs35l41_global_enable(cs35l41->regmap, cs35l41->hw_cfg.bst_type, 0);
+		cs35l41_global_enable(cs35l41->regmap, cs35l41->hw_cfg.bst_type, 0,
+				      &cs35l41->pll_lock);
 
 		ret = regmap_read_poll_timeout(cs35l41->regmap, CS35L41_IRQ1_STATUS1,
 					       val, val &  CS35L41_PDN_DONE_MASK,
@@ -802,6 +811,10 @@ static const struct snd_pcm_hw_constraint_list cs35l41_constraints = {
 static int cs35l41_pcm_startup(struct snd_pcm_substream *substream,
 			       struct snd_soc_dai *dai)
 {
+	struct cs35l41_private *cs35l41 = snd_soc_component_get_drvdata(dai->component);
+
+	reinit_completion(&cs35l41->pll_lock);
+
 	if (substream->runtime)
 		return snd_pcm_hw_constraint_list(substream->runtime, 0,
 						  SNDRV_PCM_HW_PARAM_RATE,
@@ -1252,6 +1265,10 @@ int cs35l41_probe(struct cs35l41_private *cs35l41, const struct cs35l41_hw_cfg *
 	/* Set interrupt masks for critical errors */
 	regmap_write(cs35l41->regmap, CS35L41_IRQ1_MASK1,
 		     CS35L41_INT1_MASK_DEFAULT);
+	if (cs35l41->hw_cfg.bst_type == CS35L41_SHD_BOOST_PASS ||
+	    cs35l41->hw_cfg.bst_type == CS35L41_SHD_BOOST_ACTV)
+		regmap_update_bits(cs35l41->regmap, CS35L41_IRQ1_MASK3, CS35L41_INT3_PLL_LOCK_MASK,
+				   0 << CS35L41_INT3_PLL_LOCK_SHIFT);
 
 	ret = devm_request_threaded_irq(cs35l41->dev, cs35l41->irq, NULL, cs35l41_irq,
 					IRQF_ONESHOT | IRQF_SHARED | irq_pol,
@@ -1275,6 +1292,8 @@ int cs35l41_probe(struct cs35l41_private *cs35l41, const struct cs35l41_hw_cfg *
 	if (ret < 0)
 		goto err;
 
+	init_completion(&cs35l41->pll_lock);
+
 	pm_runtime_set_autosuspend_delay(cs35l41->dev, 3000);
 	pm_runtime_use_autosuspend(cs35l41->dev);
 	pm_runtime_mark_last_busy(cs35l41->dev);
@@ -1317,6 +1336,10 @@ void cs35l41_remove(struct cs35l41_private *cs35l41)
 	pm_runtime_disable(cs35l41->dev);
 
 	regmap_write(cs35l41->regmap, CS35L41_IRQ1_MASK1, 0xFFFFFFFF);
+	if (cs35l41->hw_cfg.bst_type == CS35L41_SHD_BOOST_PASS ||
+	    cs35l41->hw_cfg.bst_type == CS35L41_SHD_BOOST_ACTV)
+		regmap_update_bits(cs35l41->regmap, CS35L41_IRQ1_MASK3, CS35L41_INT3_PLL_LOCK_MASK,
+				   1 << CS35L41_INT3_PLL_LOCK_SHIFT);
 	kfree(cs35l41->dsp.system_name);
 	wm_adsp2_remove(&cs35l41->dsp);
 	cs35l41_safe_reset(cs35l41->regmap, cs35l41->hw_cfg.bst_type);
diff --git a/sound/soc/codecs/cs35l41.h b/sound/soc/codecs/cs35l41.h
index c85cbc1dd333..34d967d4372b 100644
--- a/sound/soc/codecs/cs35l41.h
+++ b/sound/soc/codecs/cs35l41.h
@@ -33,6 +33,7 @@ struct cs35l41_private {
 	int irq;
 	/* GPIO for /RST */
 	struct gpio_desc *reset_gpio;
+	struct completion pll_lock;
 };
 
 int cs35l41_probe(struct cs35l41_private *cs35l41, const struct cs35l41_hw_cfg *hw_cfg);
-- 
2.39.2

[PATCH v7 4/4] ASoC: dt-bindings: cirrus,cs35l41: Document CS35l41 shared boost

[Lucas Tanure]

Describe the properties used for shared boost configuration.
Based on David Rhodes shared boost patches.

Signed-off-by: Lucas Tanure <lucas.tanure@collabora.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
---
 .../devicetree/bindings/sound/cirrus,cs35l41.yaml      | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/sound/cirrus,cs35l41.yaml b/Documentation/devicetree/bindings/sound/cirrus,cs35l41.yaml
index 18fb471aa891..14dea1feefc5 100644
--- a/Documentation/devicetree/bindings/sound/cirrus,cs35l41.yaml
+++ b/Documentation/devicetree/bindings/sound/cirrus,cs35l41.yaml
@@ -85,11 +85,19 @@ properties:
       boost-cap-microfarad.
       External Boost must have GPIO1 as GPIO output. GPIO1 will be set high to
       enable boost voltage.
+      Shared boost allows two amplifiers to share a single boost circuit by
+      communicating on the MDSYNC bus. The active amplifier controls the boost
+      circuit using combined data from both amplifiers. GPIO1 should be
+      configured for Sync when shared boost is used. Shared boost is not
+      compatible with External boost. Active amplifier requires
+      boost-peak-milliamp, boost-ind-nanohenry and boost-cap-microfarad.
       0 = Internal Boost
       1 = External Boost
+      2 = Shared Boost Active
+      3 = Shared Boost Passive
     $ref: /schemas/types.yaml#/definitions/uint32
     minimum: 0
-    maximum: 1
+    maximum: 3
 
   cirrus,gpio1-polarity-invert:
     description:
-- 
2.39.2

Re: [PATCH v7 0/4] Add CS35L41 shared boost feature

[David Rhodes]

On 2/23/23 02:43, Lucas Tanure wrote:
> Valve's Steam Deck uses CS35L41 in shared boost mode, where both speakers
> share the boost circuit.
> Add this support in the shared lib, but for now, shared boost is not
> supported in HDA systems as would require BIOS changes.
> 
> Based on David Rhodes shared boost patches.
> 
> Also, fix boost config overwriting in IRQ found in the review and do a
> small refactor of the code.
> 
> Changes from V6:
>   - Fix TX/RX bits in passive amp

v7 works as intended on my Deck.

Reviewed-by: David Rhodes <david.rhodes@cirrus.com>

Thanks,
David

Re: [PATCH v7 0/4] Add CS35L41 shared boost feature

[Mark Brown]

On Thu, 23 Feb 2023 08:43:20 +0000, Lucas Tanure wrote:
> Valve's Steam Deck uses CS35L41 in shared boost mode, where both speakers
> share the boost circuit.
> Add this support in the shared lib, but for now, shared boost is not
> supported in HDA systems as would require BIOS changes.
> 
> Based on David Rhodes shared boost patches.
> 
> [...]

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next

Thanks!

[1/4] ASoC: cs35l41: Only disable internal boost
      commit: 4658de99d43cd740e019e7fd124b4128f8f4027f
[2/4] ASoC: cs35l41: Refactor error release code
      commit: be9457f12e84437259707415364cc5fc96041ed6
[3/4] ALSA: cs35l41: Add shared boost feature
      commit: f5030564938be112183ba3df0cdd6dea3f694c2e
[4/4] ASoC: dt-bindings: cirrus,cs35l41: Document CS35l41 shared boost
      commit: 340307d7effd99303fe933cde3b7288f8f3c6677

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark