[PATCH V4 0/2] phy: ti: j721e-wiz: Add support to manage type-C swap on Lane2 and lane3

[PATCH V4 0/2] phy: ti: j721e-wiz: Add support to manage type-C swap on Lane2 and lane3

[Sinthu Raja]

From: Sinthu Raja <sinthu.raja@ti.com>

Hi All,
This series of patch add support to enable lanes 2 and 3 swap by
configuring the LN23 bit of the SerDes WIZ control register. Also,
it's possible that the Type-C plug orientation on the DIR line will
be implemented through hardware design. In that situation, there
won't be an external GPIO line available, but the driver still needs
to address this since the DT won't use the typec-dir-gpios property.
Update code to handle if typec-dir-gpios property is not specified in DT.

Changes in V4:
=============
- Fixe checkpatch CHECK errors.
 * Remove unnecessary paranthesis.
 * Avoid logical continuations in multiple lines.

Changes in V3:
=============
Address review comments:
- Update comment to mention the LN23 SWAP along with the LN10

Changes in V2:
=============
Address review comments:
- Update commit description as per review comments.
- Restore code to check only debounce delay only if typec-dir-gpios property is specified in DT.
- Rename enum variable name from wiz_lane_typec_swap_mode to wiz_typec_master_lane.
- Rename lane_phy_reg variable as master_lane_num.
- Update inline comments.

V1: https://lore.kernel.org/lkml/20221213124854.3779-2-sinthu.raja@ti.com/T/
V2: https://lore.kernel.org/lkml/20230106071714.30562-1-sinthu.raja@ti.com/
V3: https://lore.kernel.org/lkml/20230111111356.17392-1-sinthu.raja@ti.com/ 

Sinthu Raja (2):
  phy: ti: j721e-wiz: Manage TypeC lane swap if typec-dir-gpios not
    specified
  phy: ti: j721e-wiz: Add support to enable LN23 Type-C swap

 drivers/phy/ti/phy-j721e-wiz.c | 66 ++++++++++++++++++++++++++++------
 1 file changed, 56 insertions(+), 10 deletions(-)

-- 
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[PATCH V4 1/2] phy: ti: j721e-wiz: Manage TypeC lane swap if typec-dir-gpios not specified

[Sinthu Raja]

From: Sinthu Raja <sinthu.raja@ti.com>

It's possible that the Type-C plug orientation on the DIR line will be
implemented through hardware design. In that situation, there won't be
an external GPIO line available, but the driver still needs to address
this since the DT won't use the typec-dir-gpios property.

Add code to handle LN10 Type-C swap if typec-dir-gpios property is not
specified in DT.

Signed-off-by: Sinthu Raja <sinthu.raja@ti.com>
Reviewed-by: Roger Quadros <rogerq@kernel.org>
---

No changes in V4.

Changes in V3:
=============
- Added Reviewed-by tag.

Changes in V2:
=============
Address review comments:
- Update commit description as per review comments.
- Restore code to check only debounce delay only if typec-dir-gpios property is specified in DT.
- Rename lane_phy_reg variable as master_lane_num.
- Update inline comments.

 drivers/phy/ti/phy-j721e-wiz.c | 38 +++++++++++++++++++++++++---------
 1 file changed, 28 insertions(+), 10 deletions(-)

diff --git a/drivers/phy/ti/phy-j721e-wiz.c b/drivers/phy/ti/phy-j721e-wiz.c
index ddce5ef7711c..b5c1b82e99a6 100644
--- a/drivers/phy/ti/phy-j721e-wiz.c
+++ b/drivers/phy/ti/phy-j721e-wiz.c
@@ -376,6 +376,7 @@ struct wiz {
 	struct gpio_desc	*gpio_typec_dir;
 	int			typec_dir_delay;
 	u32 lane_phy_type[WIZ_MAX_LANES];
+	u32 master_lane_num[WIZ_MAX_LANES];
 	struct clk		*input_clks[WIZ_MAX_INPUT_CLOCKS];
 	struct clk		*output_clks[WIZ_MAX_OUTPUT_CLOCKS];
 	struct clk_onecell_data	clk_data;
@@ -1234,15 +1235,30 @@ static int wiz_phy_reset_deassert(struct reset_controller_dev *rcdev,
 	struct wiz *wiz = dev_get_drvdata(dev);
 	int ret;
 
-	/* if typec-dir gpio was specified, set LN10 SWAP bit based on that */
-	if (id == 0 && wiz->gpio_typec_dir) {
-		if (wiz->typec_dir_delay)
-			msleep_interruptible(wiz->typec_dir_delay);
-
-		if (gpiod_get_value_cansleep(wiz->gpio_typec_dir))
-			regmap_field_write(wiz->typec_ln10_swap, 1);
-		else
-			regmap_field_write(wiz->typec_ln10_swap, 0);
+	if (id == 0) {
+		/* if typec-dir gpio was specified, set LN10 SWAP bit based on that */
+		if (wiz->gpio_typec_dir) {
+			if (wiz->typec_dir_delay)
+				msleep_interruptible(wiz->typec_dir_delay);
+
+			if (gpiod_get_value_cansleep(wiz->gpio_typec_dir))
+				regmap_field_write(wiz->typec_ln10_swap, 1);
+			else
+				regmap_field_write(wiz->typec_ln10_swap, 0);
+		} else {
+			/* if no typec-dir gpio was specified and PHY type is
+			 * USB3 with master lane number is '0', set LN10 SWAP
+			 * bit to '1'
+			 */
+			u32 num_lanes = wiz->num_lanes;
+			int i;
+
+			for (i = 0; i < num_lanes; i++) {
+				if (wiz->lane_phy_type[i] == PHY_TYPE_USB3)
+					if (wiz->master_lane_num[i] == 0)
+						regmap_field_write(wiz->typec_ln10_swap, 1);
+			}
+		}
 	}
 
 	if (id == 0) {
@@ -1386,8 +1402,10 @@ static int wiz_get_lane_phy_types(struct device *dev, struct wiz *wiz)
 		dev_dbg(dev, "%s: Lanes %u-%u have phy-type %u\n", __func__,
 			reg, reg + num_lanes - 1, phy_type);
 
-		for (i = reg; i < reg + num_lanes; i++)
+		for (i = reg; i < reg + num_lanes; i++) {
+			wiz->master_lane_num[i] = reg;
 			wiz->lane_phy_type[i] = phy_type;
+		}
 	}
 
 	return 0;
-- 
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[PATCH V4 2/2] phy: ti: j721e-wiz: Add support to enable LN23 Type-C swap

[Sinthu Raja]

From: Sinthu Raja <sinthu.raja@ti.com>

The WIZ acts as a wrapper for SerDes and has Lanes 0 and 2 reserved
for USB for type-C lane swap if Lane 1 and Lane 3 are linked to the
USB PHY that is integrated into the SerDes IP. The WIZ control register
has to be configured to support this lane swap feature.

The support for swapping lanes 2 and 3 is missing and therefore
add support to configure the control register to swap between
lanes 2 and 3 if PHY type is USB.

Signed-off-by: Sinthu Raja <sinthu.raja@ti.com>
Reviewed-by: Roger Quadros <rogerq@kernel.org>
---

Changes in V4:
============
- Add Review tag.
- Fix checkpatch CHECK errors.
 * Remove unnecessary paranthesis.
 * Avoid logical continuations in multiple lines.

Changes in V3:
=============
Address review comments:
- Update comment to mention the LN23 SWAP along with the LN10

Changes in V2:
=============
Address review comments:
- Update commit description.
- Rename enum variable name from wiz_lane_typec_swap_mode to wiz_typec_master_lane.
- Rename enumerators name specific to list of master lanes used for lane swapping.
- Add inline comments.

 drivers/phy/ti/phy-j721e-wiz.c | 38 +++++++++++++++++++++++++++++-----
 1 file changed, 33 insertions(+), 5 deletions(-)

diff --git a/drivers/phy/ti/phy-j721e-wiz.c b/drivers/phy/ti/phy-j721e-wiz.c
index b5c1b82e99a6..1b83c98a78f0 100644
--- a/drivers/phy/ti/phy-j721e-wiz.c
+++ b/drivers/phy/ti/phy-j721e-wiz.c
@@ -58,6 +58,14 @@ enum wiz_lane_standard_mode {
 	LANE_MODE_GEN4,
 };
 
+/*
+ * List of master lanes used for lane swapping
+ */
+enum wiz_typec_master_lane {
+	LANE0 = 0,
+	LANE2 = 2,
+};
+
 enum wiz_refclk_mux_sel {
 	PLL0_REFCLK,
 	PLL1_REFCLK,
@@ -194,6 +202,9 @@ static const struct reg_field p_mac_div_sel1[WIZ_MAX_LANES] = {
 static const struct reg_field typec_ln10_swap =
 					REG_FIELD(WIZ_SERDES_TYPEC, 30, 30);
 
+static const struct reg_field typec_ln23_swap =
+					REG_FIELD(WIZ_SERDES_TYPEC, 31, 31);
+
 struct wiz_clk_mux {
 	struct clk_hw		hw;
 	struct regmap_field	*field;
@@ -367,6 +378,7 @@ struct wiz {
 	struct regmap_field	*mux_sel_field[WIZ_MUX_NUM_CLOCKS];
 	struct regmap_field	*div_sel_field[WIZ_DIV_NUM_CLOCKS_16G];
 	struct regmap_field	*typec_ln10_swap;
+	struct regmap_field	*typec_ln23_swap;
 	struct regmap_field	*sup_legacy_clk_override;
 
 	struct device		*dev;
@@ -676,6 +688,13 @@ static int wiz_regfield_init(struct wiz *wiz)
 		return PTR_ERR(wiz->typec_ln10_swap);
 	}
 
+	wiz->typec_ln23_swap = devm_regmap_field_alloc(dev, regmap,
+						       typec_ln23_swap);
+	if (IS_ERR(wiz->typec_ln23_swap)) {
+		dev_err(dev, "LN23_SWAP reg field init failed\n");
+		return PTR_ERR(wiz->typec_ln23_swap);
+	}
+
 	wiz->phy_en_refclk = devm_regmap_field_alloc(dev, regmap, phy_en_refclk);
 	if (IS_ERR(wiz->phy_en_refclk)) {
 		dev_err(dev, "PHY_EN_REFCLK reg field init failed\n");
@@ -1246,17 +1265,26 @@ static int wiz_phy_reset_deassert(struct reset_controller_dev *rcdev,
 			else
 				regmap_field_write(wiz->typec_ln10_swap, 0);
 		} else {
-			/* if no typec-dir gpio was specified and PHY type is
-			 * USB3 with master lane number is '0', set LN10 SWAP
-			 * bit to '1'
+			/* if no typec-dir gpio is specified and PHY type is USB3
+			 * with master lane number is '0' or '2', then set LN10 or
+			 * LN23 SWAP bit to '1' respectively.
 			 */
 			u32 num_lanes = wiz->num_lanes;
 			int i;
 
 			for (i = 0; i < num_lanes; i++) {
-				if (wiz->lane_phy_type[i] == PHY_TYPE_USB3)
-					if (wiz->master_lane_num[i] == 0)
+				if (wiz->lane_phy_type[i] == PHY_TYPE_USB3) {
+					switch (wiz->master_lane_num[i]) {
+					case LANE0:
 						regmap_field_write(wiz->typec_ln10_swap, 1);
+						break;
+					case LANE2:
+						regmap_field_write(wiz->typec_ln23_swap, 1);
+						break;
+					default:
+						break;
+					}
+				}
 			}
 		}
 	}
-- 
2.36.1


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Re: [PATCH V4 0/2] phy: ti: j721e-wiz: Add support to manage type-C swap on Lane2 and lane3

[Vinod Koul]

On 13-01-23, 20:36, Sinthu Raja wrote:
> From: Sinthu Raja <sinthu.raja@ti.com>
> 
> Hi All,
> This series of patch add support to enable lanes 2 and 3 swap by
> configuring the LN23 bit of the SerDes WIZ control register. Also,
> it's possible that the Type-C plug orientation on the DIR line will
> be implemented through hardware design. In that situation, there
> won't be an external GPIO line available, but the driver still needs
> to address this since the DT won't use the typec-dir-gpios property.
> Update code to handle if typec-dir-gpios property is not specified in DT.

Applied, thanks

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