diff mbox series

[v2,3/7] phy: qcom: qmp-combo: introduce QPHY_MODE

Message ID 20240527-topic-sm8x50-upstream-phy-combo-typec-mux-v2-3-a03e68d7b8fc@linaro.org (mailing list archive)
State Not Applicable
Headers show
Series arm64: qcom: allow up to 4 lanes for the Type-C DisplayPort Altmode | expand

Commit Message

Neil Armstrong May 27, 2024, 8:42 a.m. UTC 
Introduce an enum for the QMP Combo PHY modes, use it in the
QMP commmon phy init function and default to COMBO mode.

Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
---
 drivers/phy/qualcomm/phy-qcom-qmp-combo.c | 41 +++++++++++++++++++++++++++----
 1 file changed, 36 insertions(+), 5 deletions(-)

Comments

Dmitry Baryshkov May 27, 2024, 8:46 a.m. UTC | #1 
On Mon, May 27, 2024 at 10:42:35AM +0200, Neil Armstrong wrote:
> Introduce an enum for the QMP Combo PHY modes, use it in the
> QMP commmon phy init function and default to COMBO mode.
> 
> Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
> ---
>  drivers/phy/qualcomm/phy-qcom-qmp-combo.c | 41 +++++++++++++++++++++++++++----
>  1 file changed, 36 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
> index 183cd9cd1884..788e4c05eaf2 100644
> --- a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
> +++ b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
> @@ -61,6 +61,12 @@
>  
>  #define PHY_INIT_COMPLETE_TIMEOUT		10000
>  
> +enum qphy_mode {
> +	QPHY_MODE_COMBO = 0,
> +	QPHY_MODE_DP_ONLY,
> +	QPHY_MODE_USB_ONLY,
> +};
> +
>  /* set of registers with offsets different per-PHY */
>  enum qphy_reg_layout {
>  	/* PCS registers */
> @@ -1503,6 +1509,7 @@ struct qmp_combo {
>  
>  	struct mutex phy_mutex;
>  	int init_count;
> +	enum qphy_mode init_mode;
>  
>  	struct phy *usb_phy;
>  	enum phy_mode mode;
> @@ -2589,12 +2596,33 @@ static int qmp_combo_com_init(struct qmp_combo *qmp, bool force)
>  	if (qmp->orientation == TYPEC_ORIENTATION_REVERSE)
>  		val |= SW_PORTSELECT_VAL;
>  	writel(val, com + QPHY_V3_DP_COM_TYPEC_CTRL);
> -	writel(USB3_MODE | DP_MODE, com + QPHY_V3_DP_COM_PHY_MODE_CTRL);
>  
> -	/* bring both QMP USB and QMP DP PHYs PCS block out of reset */
> -	qphy_clrbits(com, QPHY_V3_DP_COM_RESET_OVRD_CTRL,
> -			SW_DPPHY_RESET_MUX | SW_DPPHY_RESET |
> -			SW_USB3PHY_RESET_MUX | SW_USB3PHY_RESET);
> +	switch (qmp->init_mode) {
> +	case QPHY_MODE_COMBO:
> +		writel(USB3_MODE | DP_MODE, com + QPHY_V3_DP_COM_PHY_MODE_CTRL);
> +
> +		/* bring both QMP USB and QMP DP PHYs PCS block out of reset */
> +		qphy_clrbits(com, QPHY_V3_DP_COM_RESET_OVRD_CTRL,
> +				SW_DPPHY_RESET_MUX | SW_DPPHY_RESET |
> +				SW_USB3PHY_RESET_MUX | SW_USB3PHY_RESET);
> +		break;
> +
> +	case QPHY_MODE_DP_ONLY:
> +		writel(DP_MODE, com + QPHY_V3_DP_COM_PHY_MODE_CTRL);
> +
> +		/* bring QMP DP PHY PCS block out of reset */
> +		qphy_clrbits(com, QPHY_V3_DP_COM_RESET_OVRD_CTRL,
> +				SW_DPPHY_RESET_MUX | SW_DPPHY_RESET);
> +		break;
> +
> +	case QPHY_MODE_USB_ONLY:
> +		writel(USB3_MODE, com + QPHY_V3_DP_COM_PHY_MODE_CTRL);
> +
> +		/* bring QMP USB PHY PCS block out of reset */
> +		qphy_clrbits(com, QPHY_V3_DP_COM_RESET_OVRD_CTRL,
> +				SW_USB3PHY_RESET_MUX | SW_USB3PHY_RESET);
> +		break;
> +	}
>  
>  	qphy_clrbits(com, QPHY_V3_DP_COM_SWI_CTRL, 0x03);
>  	qphy_clrbits(com, QPHY_V3_DP_COM_SW_RESET, SW_RESET);
> @@ -3603,6 +3631,9 @@ static int qmp_combo_probe(struct platform_device *pdev)
>  	if (ret)
>  		goto err_node_put;
>  
> +	/* Set PHY_MODE as combo by default */
> +	qmp->init_mode = QPHY_MODE_COMBO;
> +

I see that COMBO mode is backwards compatible with existing code. But
shouldn't the USB-only be a default mode?

>  	qmp->usb_phy = devm_phy_create(dev, usb_np, &qmp_combo_usb_phy_ops);
>  	if (IS_ERR(qmp->usb_phy)) {
>  		ret = PTR_ERR(qmp->usb_phy);
> 
> -- 
> 2.34.1
>
Neil Armstrong May 27, 2024, 8:48 a.m. UTC | #2 
On 27/05/2024 10:46, Dmitry Baryshkov wrote:
> On Mon, May 27, 2024 at 10:42:35AM +0200, Neil Armstrong wrote:
>> Introduce an enum for the QMP Combo PHY modes, use it in the
>> QMP commmon phy init function and default to COMBO mode.
>>
>> Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
>> ---
>>   drivers/phy/qualcomm/phy-qcom-qmp-combo.c | 41 +++++++++++++++++++++++++++----
>>   1 file changed, 36 insertions(+), 5 deletions(-)
>>
>> diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
>> index 183cd9cd1884..788e4c05eaf2 100644
>> --- a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
>> +++ b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
>> @@ -61,6 +61,12 @@
>>   
>>   #define PHY_INIT_COMPLETE_TIMEOUT		10000
>>   
>> +enum qphy_mode {
>> +	QPHY_MODE_COMBO = 0,
>> +	QPHY_MODE_DP_ONLY,
>> +	QPHY_MODE_USB_ONLY,
>> +};
>> +
>>   /* set of registers with offsets different per-PHY */
>>   enum qphy_reg_layout {
>>   	/* PCS registers */
>> @@ -1503,6 +1509,7 @@ struct qmp_combo {
>>   
>>   	struct mutex phy_mutex;
>>   	int init_count;
>> +	enum qphy_mode init_mode;
>>   
>>   	struct phy *usb_phy;
>>   	enum phy_mode mode;
>> @@ -2589,12 +2596,33 @@ static int qmp_combo_com_init(struct qmp_combo *qmp, bool force)
>>   	if (qmp->orientation == TYPEC_ORIENTATION_REVERSE)
>>   		val |= SW_PORTSELECT_VAL;
>>   	writel(val, com + QPHY_V3_DP_COM_TYPEC_CTRL);
>> -	writel(USB3_MODE | DP_MODE, com + QPHY_V3_DP_COM_PHY_MODE_CTRL);
>>   
>> -	/* bring both QMP USB and QMP DP PHYs PCS block out of reset */
>> -	qphy_clrbits(com, QPHY_V3_DP_COM_RESET_OVRD_CTRL,
>> -			SW_DPPHY_RESET_MUX | SW_DPPHY_RESET |
>> -			SW_USB3PHY_RESET_MUX | SW_USB3PHY_RESET);
>> +	switch (qmp->init_mode) {
>> +	case QPHY_MODE_COMBO:
>> +		writel(USB3_MODE | DP_MODE, com + QPHY_V3_DP_COM_PHY_MODE_CTRL);
>> +
>> +		/* bring both QMP USB and QMP DP PHYs PCS block out of reset */
>> +		qphy_clrbits(com, QPHY_V3_DP_COM_RESET_OVRD_CTRL,
>> +				SW_DPPHY_RESET_MUX | SW_DPPHY_RESET |
>> +				SW_USB3PHY_RESET_MUX | SW_USB3PHY_RESET);
>> +		break;
>> +
>> +	case QPHY_MODE_DP_ONLY:
>> +		writel(DP_MODE, com + QPHY_V3_DP_COM_PHY_MODE_CTRL);
>> +
>> +		/* bring QMP DP PHY PCS block out of reset */
>> +		qphy_clrbits(com, QPHY_V3_DP_COM_RESET_OVRD_CTRL,
>> +				SW_DPPHY_RESET_MUX | SW_DPPHY_RESET);
>> +		break;
>> +
>> +	case QPHY_MODE_USB_ONLY:
>> +		writel(USB3_MODE, com + QPHY_V3_DP_COM_PHY_MODE_CTRL);
>> +
>> +		/* bring QMP USB PHY PCS block out of reset */
>> +		qphy_clrbits(com, QPHY_V3_DP_COM_RESET_OVRD_CTRL,
>> +				SW_USB3PHY_RESET_MUX | SW_USB3PHY_RESET);
>> +		break;
>> +	}
>>   
>>   	qphy_clrbits(com, QPHY_V3_DP_COM_SWI_CTRL, 0x03);
>>   	qphy_clrbits(com, QPHY_V3_DP_COM_SW_RESET, SW_RESET);
>> @@ -3603,6 +3631,9 @@ static int qmp_combo_probe(struct platform_device *pdev)
>>   	if (ret)
>>   		goto err_node_put;
>>   
>> +	/* Set PHY_MODE as combo by default */
>> +	qmp->init_mode = QPHY_MODE_COMBO;
>> +
> 
> I see that COMBO mode is backwards compatible with existing code. But
> shouldn't the USB-only be a default mode?

No because it would break existing platforms without "mode-switch" in DT.

Neil

> 
>>   	qmp->usb_phy = devm_phy_create(dev, usb_np, &qmp_combo_usb_phy_ops);
>>   	if (IS_ERR(qmp->usb_phy)) {
>>   		ret = PTR_ERR(qmp->usb_phy);
>>
>> -- 
>> 2.34.1
>>
>
Dmitry Baryshkov May 27, 2024, 8:59 a.m. UTC | #3 
On Mon, May 27, 2024 at 10:48:12AM +0200, Neil Armstrong wrote:
> On 27/05/2024 10:46, Dmitry Baryshkov wrote:
> > On Mon, May 27, 2024 at 10:42:35AM +0200, Neil Armstrong wrote:
> > > Introduce an enum for the QMP Combo PHY modes, use it in the
> > > QMP commmon phy init function and default to COMBO mode.
> > > 
> > > Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
> > > ---
> > >   drivers/phy/qualcomm/phy-qcom-qmp-combo.c | 41 +++++++++++++++++++++++++++----
> > >   1 file changed, 36 insertions(+), 5 deletions(-)
> > > 

[trimmed]

> > > @@ -3603,6 +3631,9 @@ static int qmp_combo_probe(struct platform_device *pdev)
> > >   	if (ret)
> > >   		goto err_node_put;
> > > +	/* Set PHY_MODE as combo by default */
> > > +	qmp->init_mode = QPHY_MODE_COMBO;
> > > +
> > 
> > I see that COMBO mode is backwards compatible with existing code. But
> > shouldn't the USB-only be a default mode?
> 
> No because it would break existing platforms without "mode-switch" in DT.


Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>


> 
> Neil
> 
> > 
> > >   	qmp->usb_phy = devm_phy_create(dev, usb_np, &qmp_combo_usb_phy_ops);
> > >   	if (IS_ERR(qmp->usb_phy)) {
> > >   		ret = PTR_ERR(qmp->usb_phy);
> > > 
> > > -- 
> > > 2.34.1
> > > 
> > 
>
diff mbox series

Patch

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
index 183cd9cd1884..788e4c05eaf2 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
@@ -61,6 +61,12 @@ 
 
 #define PHY_INIT_COMPLETE_TIMEOUT		10000
 
+enum qphy_mode {
+	QPHY_MODE_COMBO = 0,
+	QPHY_MODE_DP_ONLY,
+	QPHY_MODE_USB_ONLY,
+};
+
 /* set of registers with offsets different per-PHY */
 enum qphy_reg_layout {
 	/* PCS registers */
@@ -1503,6 +1509,7 @@  struct qmp_combo {
 
 	struct mutex phy_mutex;
 	int init_count;
+	enum qphy_mode init_mode;
 
 	struct phy *usb_phy;
 	enum phy_mode mode;
@@ -2589,12 +2596,33 @@  static int qmp_combo_com_init(struct qmp_combo *qmp, bool force)
 	if (qmp->orientation == TYPEC_ORIENTATION_REVERSE)
 		val |= SW_PORTSELECT_VAL;
 	writel(val, com + QPHY_V3_DP_COM_TYPEC_CTRL);
-	writel(USB3_MODE | DP_MODE, com + QPHY_V3_DP_COM_PHY_MODE_CTRL);
 
-	/* bring both QMP USB and QMP DP PHYs PCS block out of reset */
-	qphy_clrbits(com, QPHY_V3_DP_COM_RESET_OVRD_CTRL,
-			SW_DPPHY_RESET_MUX | SW_DPPHY_RESET |
-			SW_USB3PHY_RESET_MUX | SW_USB3PHY_RESET);
+	switch (qmp->init_mode) {
+	case QPHY_MODE_COMBO:
+		writel(USB3_MODE | DP_MODE, com + QPHY_V3_DP_COM_PHY_MODE_CTRL);
+
+		/* bring both QMP USB and QMP DP PHYs PCS block out of reset */
+		qphy_clrbits(com, QPHY_V3_DP_COM_RESET_OVRD_CTRL,
+				SW_DPPHY_RESET_MUX | SW_DPPHY_RESET |
+				SW_USB3PHY_RESET_MUX | SW_USB3PHY_RESET);
+		break;
+
+	case QPHY_MODE_DP_ONLY:
+		writel(DP_MODE, com + QPHY_V3_DP_COM_PHY_MODE_CTRL);
+
+		/* bring QMP DP PHY PCS block out of reset */
+		qphy_clrbits(com, QPHY_V3_DP_COM_RESET_OVRD_CTRL,
+				SW_DPPHY_RESET_MUX | SW_DPPHY_RESET);
+		break;
+
+	case QPHY_MODE_USB_ONLY:
+		writel(USB3_MODE, com + QPHY_V3_DP_COM_PHY_MODE_CTRL);
+
+		/* bring QMP USB PHY PCS block out of reset */
+		qphy_clrbits(com, QPHY_V3_DP_COM_RESET_OVRD_CTRL,
+				SW_USB3PHY_RESET_MUX | SW_USB3PHY_RESET);
+		break;
+	}
 
 	qphy_clrbits(com, QPHY_V3_DP_COM_SWI_CTRL, 0x03);
 	qphy_clrbits(com, QPHY_V3_DP_COM_SW_RESET, SW_RESET);
@@ -3603,6 +3631,9 @@  static int qmp_combo_probe(struct platform_device *pdev)
 	if (ret)
 		goto err_node_put;
 
+	/* Set PHY_MODE as combo by default */
+	qmp->init_mode = QPHY_MODE_COMBO;
+
 	qmp->usb_phy = devm_phy_create(dev, usb_np, &qmp_combo_usb_phy_ops);
 	if (IS_ERR(qmp->usb_phy)) {
 		ret = PTR_ERR(qmp->usb_phy);