[PATCH v5 0/3] Add JH7110 MIPI DPHY RX support

[PATCH v5 0/3] Add JH7110 MIPI DPHY RX support

[Changhuang Liang]

This patchset adds mipi dphy rx driver for the StarFive JH7110 SoC.
It is used to transfer CSI camera data. The series has been tested on
the VisionFive 2 board.

This patchset should be applied after the patchset [1] [2]:
[1] https://lore.kernel.org/all/20230518101234.143748-1-xingyu.wu@starfivetech.com/
[2] https://lore.kernel.org/all/20230519060202.15296-1-changhuang.liang@starfivetech.com/

changes since v4:
- Rebased on tag v6.4-rc2.

patch 1:
- Dropped "lane_maps" property.

patch 2:
- Added lane maps in compatible.

patch 3:
- Dropped "lane_maps" property.
- Changed "pwrc_dphy" to "aon_syscon".

v4: https://lore.kernel.org/all/20230412084540.295411-1-changhuang.liang@starfivetech.com/

changes since v3:
- Rebased on tag v6.3-rc4.

patch 1 & patch 3:
- Changed "starfive,aon-syscon" to "power-domains".
- Added "lane_maps" property.

patch 2:
- Changed "STF_DPHY_APBCFGSAIF__SYSCFG(x)" to "STF_DPHY_APBCFGSAIF_SYSCFG(x)".
- Merged phy_init into phy_power_on.
- Merged phy_exit into phy_power_off.
- Replaced syscon with power domain framework.
- Parsed "lane_maps" property form device tree.
- Dropped compatible private data.

v3: https://lore.kernel.org/all/20230315100421.133428-1-changhuang.liang@starfivetech.com/

changes since v2:
- Rebased on tag v6.3-rc1.

patch 1:
- Changed the 'Starfive' to 'StarFive'.
- Changed the "items" to "- items".
- Add description to clocks.

patch 2:
- Changed the 'Starfive' to 'StarFive'.
- Updated the driver order in MAINTAINERS.

patch 3:
- Changed the 'Starfive' to 'StarFive'.
- Update clocks&resets macros follow patchset [1].

v2: https://lore.kernel.org/all/20230223015952.201841-1-changhuang.liang@starfivetech.com/

changes since v1:
- Rebased on tag v6.2.
- Dropped patch 1, it will be added by the patch [2].

patch 1:
- Changed the node name 'dphy' to 'phy'.
- Changed the "starfive,aon-syscon" description.
- Changed the MIPI DPHY RX IP description.
- Add description to resets.
- Update devicetree binding examples.

patch 2:
- Changed the commit message.

patch 3:
- Changed the commit message.
- Changed the node name 'dphy' to 'phy'.
- Sorted the node by address.

v1: https://lore.kernel.org/all/20230210061713.6449-1-changhuang.liang@starfivetech.com/

Changhuang Liang (3):
  dt-bindings: phy: Add starfive,jh7110-dphy-rx
  phy: starfive: Add mipi dphy rx support
  riscv: dts: starfive: Add dphy rx node

 .../bindings/phy/starfive,jh7110-dphy-rx.yaml |  71 +++++
 MAINTAINERS                                   |   7 +
 arch/riscv/boot/dts/starfive/jh7110.dtsi      |  13 +
 drivers/phy/Kconfig                           |   1 +
 drivers/phy/Makefile                          |   1 +
 drivers/phy/starfive/Kconfig                  |  13 +
 drivers/phy/starfive/Makefile                 |   2 +
 drivers/phy/starfive/phy-starfive-dphy-rx.c   | 300 ++++++++++++++++++
 8 files changed, 408 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/phy/starfive,jh7110-dphy-rx.yaml
 create mode 100644 drivers/phy/starfive/Kconfig
 create mode 100644 drivers/phy/starfive/Makefile
 create mode 100644 drivers/phy/starfive/phy-starfive-dphy-rx.c


base-commit: f1fcbaa18b28dec10281551dfe6ed3a3ed80e3d6
--
2.25.1

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[PATCH v5 1/3] dt-bindings: phy: Add starfive,jh7110-dphy-rx

[Changhuang Liang]

StarFive SoCs like the jh7110 use a MIPI D-PHY RX controller based on
a M31 IP. Add a binding for it.

Signed-off-by: Changhuang Liang <changhuang.liang@starfivetech.com>
---
 .../bindings/phy/starfive,jh7110-dphy-rx.yaml | 71 +++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/phy/starfive,jh7110-dphy-rx.yaml

diff --git a/Documentation/devicetree/bindings/phy/starfive,jh7110-dphy-rx.yaml b/Documentation/devicetree/bindings/phy/starfive,jh7110-dphy-rx.yaml
new file mode 100644
index 000000000000..46fd370188e8
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/starfive,jh7110-dphy-rx.yaml
@@ -0,0 +1,71 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/phy/starfive,jh7110-dphy-rx.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: StarFive SoC MIPI D-PHY Rx Controller
+
+maintainers:
+  - Jack Zhu <jack.zhu@starfivetech.com>
+  - Changhuang Liang <changhuang.liang@starfivetech.com>
+
+description:
+  The StarFive SoC uses the MIPI CSI D-PHY based on M31 IP to transfer
+  CSI camera data.
+
+properties:
+  compatible:
+    const: starfive,jh7110-dphy-rx
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: config clock
+      - description: reference clock
+      - description: escape mode transmit clock
+
+  clock-names:
+    items:
+      - const: cfg
+      - const: ref
+      - const: tx
+
+  resets:
+    items:
+      - description: DPHY_HW reset
+      - description: DPHY_B09_ALWAYS_ON reset
+
+  power-domains:
+    maxItems: 1
+
+  "#phy-cells":
+    const: 0
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - resets
+  - power-domains
+  - "#phy-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    phy@19820000 {
+      compatible = "starfive,jh7110-dphy-rx";
+      reg = <0x19820000 0x10000>;
+      clocks = <&ispcrg 3>,
+               <&ispcrg 4>,
+               <&ispcrg 5>;
+      clock-names = "cfg", "ref", "tx";
+      resets = <&ispcrg 2>,
+               <&ispcrg 3>;
+      power-domains = <&dphy_pwrc 1>;
+      #phy-cells = <0>;
+    };
-- 
2.25.1


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[PATCH v5 2/3] phy: starfive: Add mipi dphy rx support

[Changhuang Liang]

Add mipi dphy rx support for the StarFive JH7110 SoC. It is used to
transfer CSI camera data.

Signed-off-by: Changhuang Liang <changhuang.liang@starfivetech.com>
---
 MAINTAINERS                                 |   7 +
 drivers/phy/Kconfig                         |   1 +
 drivers/phy/Makefile                        |   1 +
 drivers/phy/starfive/Kconfig                |  13 +
 drivers/phy/starfive/Makefile               |   2 +
 drivers/phy/starfive/phy-starfive-dphy-rx.c | 300 ++++++++++++++++++++
 6 files changed, 324 insertions(+)
 create mode 100644 drivers/phy/starfive/Kconfig
 create mode 100644 drivers/phy/starfive/Makefile
 create mode 100644 drivers/phy/starfive/phy-starfive-dphy-rx.c

diff --git a/MAINTAINERS b/MAINTAINERS
index 92c7076c4fed..a5fac3f015b4 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -20092,6 +20092,13 @@ S:	Maintained
 F:	Documentation/devicetree/bindings/net/starfive,jh7110-dwmac.yaml
 F:	drivers/net/ethernet/stmicro/stmmac/dwmac-starfive.c
 
+STARFIVE JH7110 DPHY RX DRIVER
+M:	Jack Zhu <jack.zhu@starfivetech.com>
+M:	Changhuang Liang <changhuang.liang@starfivetech.com>
+S:	Supported
+F:	Documentation/devicetree/bindings/phy/starfive,jh7110-dphy-rx.yaml
+F:	drivers/phy/starfive/phy-starfive-dphy-rx.c
+
 STARFIVE JH7110 MMC/SD/SDIO DRIVER
 M:	William Qiu <william.qiu@starfivetech.com>
 S:	Supported
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index f46e3148d286..0000149edbc4 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -91,6 +91,7 @@ source "drivers/phy/rockchip/Kconfig"
 source "drivers/phy/samsung/Kconfig"
 source "drivers/phy/socionext/Kconfig"
 source "drivers/phy/st/Kconfig"
+source "drivers/phy/starfive/Kconfig"
 source "drivers/phy/sunplus/Kconfig"
 source "drivers/phy/tegra/Kconfig"
 source "drivers/phy/ti/Kconfig"
diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
index 54f312c10a40..fb3dc9de6111 100644
--- a/drivers/phy/Makefile
+++ b/drivers/phy/Makefile
@@ -31,6 +31,7 @@ obj-y					+= allwinner/	\
 					   samsung/	\
 					   socionext/	\
 					   st/		\
+					   starfive/	\
 					   sunplus/	\
 					   tegra/	\
 					   ti/		\
diff --git a/drivers/phy/starfive/Kconfig b/drivers/phy/starfive/Kconfig
new file mode 100644
index 000000000000..f989b8ff8bcb
--- /dev/null
+++ b/drivers/phy/starfive/Kconfig
@@ -0,0 +1,13 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Phy drivers for StarFive platforms
+#
+
+config PHY_STARFIVE_DPHY_RX
+	tristate "StarFive D-PHY RX Support"
+	select GENERIC_PHY
+	select GENERIC_PHY_MIPI_DPHY
+	help
+	  Choose this option if you have a StarFive D-PHY in your
+	  system. If M is selected, the module will be called
+	  phy-starfive-dphy-rx.
diff --git a/drivers/phy/starfive/Makefile b/drivers/phy/starfive/Makefile
new file mode 100644
index 000000000000..7ec576cb30ae
--- /dev/null
+++ b/drivers/phy/starfive/Makefile
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_PHY_STARFIVE_DPHY_RX)      += phy-starfive-dphy-rx.o
diff --git a/drivers/phy/starfive/phy-starfive-dphy-rx.c b/drivers/phy/starfive/phy-starfive-dphy-rx.c
new file mode 100644
index 000000000000..6974ed904d0d
--- /dev/null
+++ b/drivers/phy/starfive/phy-starfive-dphy-rx.c
@@ -0,0 +1,300 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * DPHY driver for the StarFive JH7110 SoC
+ *
+ * Copyright (C) 2023 StarFive Technology Co., Ltd.
+ */
+
+#include <linux/bitfield.h>
+#include <linux/bitops.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/reset.h>
+
+#define STF_DPHY_APBCFGSAIF_SYSCFG(x)		(x)
+
+#define STF_DPHY_DA_CDPHY_R100_CTRL0_2D1C_EFUSE_EN BIT(6)
+#define STF_DPHY_DA_CDPHY_R100_CTRL0_2D1C_EFUSE_IN GENMASK(12, 7)
+#define STF_DPHY_DA_CDPHY_R100_CTRL1_2D1C_EFUSE_EN BIT(19)
+#define STF_DPHY_DA_CDPHY_R100_CTRL1_2D1C_EFUSE_IN GENMASK(25, 20)
+
+#define STF_DPHY_DATA_BUS16_8			BIT(8)
+#define STF_DPHY_DEBUG_MODE_SEL			GENMASK(15, 9)
+
+#define STF_DPHY_ENABLE_CLK			BIT(6)
+#define STF_DPHY_ENABLE_CLK1			BIT(7)
+#define STF_DPHY_ENABLE_LAN0			BIT(8)
+#define STF_DPHY_ENABLE_LAN1			BIT(9)
+#define STF_DPHY_ENABLE_LAN2			BIT(10)
+#define STF_DPHY_ENABLE_LAN3			BIT(11)
+#define STF_DPHY_GPI_EN				GENMASK(17, 12)
+#define STF_DPHY_HS_FREQ_CHANGE_CLK		BIT(18)
+#define STF_DPHY_HS_FREQ_CHANGE_CLK1		BIT(19)
+#define STF_DPHY_LANE_SWAP_CLK			GENMASK(22, 20)
+#define STF_DPHY_LANE_SWAP_CLK1			GENMASK(25, 23)
+#define STF_DPHY_LANE_SWAP_LAN0			GENMASK(28, 26)
+#define STF_DPHY_LANE_SWAP_LAN1			GENMASK(31, 29)
+
+#define STF_DPHY_LANE_SWAP_LAN2			GENMASK(2, 0)
+#define STF_DPHY_LANE_SWAP_LAN3			GENMASK(5, 3)
+#define STF_DPHY_MP_TEST_EN			BIT(6)
+#define STF_DPHY_MP_TEST_MODE_SEL		GENMASK(11, 7)
+#define STF_DPHY_PLL_CLK_SEL			GENMASK(21, 12)
+#define STF_DPHY_PRECOUNTER_IN_CLK		GENMASK(29, 22)
+
+#define STF_DPHY_PRECOUNTER_IN_CLK1		GENMASK(7, 0)
+#define STF_DPHY_PRECOUNTER_IN_LAN0		GENMASK(15, 8)
+#define STF_DPHY_PRECOUNTER_IN_LAN1		GENMASK(23, 16)
+#define STF_DPHY_PRECOUNTER_IN_LAN2		GENMASK(31, 24)
+
+#define STF_DPHY_PRECOUNTER_IN_LAN3		GENMASK(7, 0)
+#define STF_DPHY_RX_1C2C_SEL			BIT(8)
+
+#define STF_MAP_LANES_NUM			6
+
+struct regval {
+	u32 addr;
+	u32 val;
+};
+
+struct stf_dphy_info {
+	/**
+	 * @maps:
+	 *
+	 * Physical lanes and logic lanes mapping table.
+	 *
+	 * The default order is:
+	 * [clk lane0, data lane 0, data lane 1, data lane 2, date lane 3, clk lane 1]
+	 */
+	u8 maps[STF_MAP_LANES_NUM];
+};
+
+struct stf_dphy {
+	struct device *dev;
+	void __iomem *regs;
+	struct clk *cfg_clk;
+	struct clk *ref_clk;
+	struct clk *tx_clk;
+	struct reset_control *rstc;
+	struct regulator *mipi_0p9;
+	struct phy *phy;
+	const struct stf_dphy_info *info;
+};
+
+static const struct regval stf_dphy_init_list[] = {
+	{ STF_DPHY_APBCFGSAIF_SYSCFG(4), 0x00000000 },
+	{ STF_DPHY_APBCFGSAIF_SYSCFG(8), 0x00000000 },
+	{ STF_DPHY_APBCFGSAIF_SYSCFG(12), 0x0000fff0 },
+	{ STF_DPHY_APBCFGSAIF_SYSCFG(16), 0x00000000 },
+	{ STF_DPHY_APBCFGSAIF_SYSCFG(20), 0x00000000 },
+	{ STF_DPHY_APBCFGSAIF_SYSCFG(24), 0x00000000 },
+	{ STF_DPHY_APBCFGSAIF_SYSCFG(28), 0x00000000 },
+	{ STF_DPHY_APBCFGSAIF_SYSCFG(32), 0x00000000 },
+	{ STF_DPHY_APBCFGSAIF_SYSCFG(36), 0x00000000 },
+	{ STF_DPHY_APBCFGSAIF_SYSCFG(40), 0x00000000 },
+	{ STF_DPHY_APBCFGSAIF_SYSCFG(40), 0x00000000 },
+	{ STF_DPHY_APBCFGSAIF_SYSCFG(48), 0x24000000 },
+	{ STF_DPHY_APBCFGSAIF_SYSCFG(52), 0x00000000 },
+	{ STF_DPHY_APBCFGSAIF_SYSCFG(56), 0x00000000 },
+	{ STF_DPHY_APBCFGSAIF_SYSCFG(60), 0x00000000 },
+	{ STF_DPHY_APBCFGSAIF_SYSCFG(64), 0x00000000 },
+	{ STF_DPHY_APBCFGSAIF_SYSCFG(68), 0x00000000 },
+	{ STF_DPHY_APBCFGSAIF_SYSCFG(72), 0x00000000 },
+	{ STF_DPHY_APBCFGSAIF_SYSCFG(76), 0x00000000 },
+	{ STF_DPHY_APBCFGSAIF_SYSCFG(80), 0x00000000 },
+	{ STF_DPHY_APBCFGSAIF_SYSCFG(84), 0x00000000 },
+	{ STF_DPHY_APBCFGSAIF_SYSCFG(88), 0x00000000 },
+	{ STF_DPHY_APBCFGSAIF_SYSCFG(92), 0x00000000 },
+	{ STF_DPHY_APBCFGSAIF_SYSCFG(96), 0x00000000 },
+	{ STF_DPHY_APBCFGSAIF_SYSCFG(100), 0x02000000 },
+	{ STF_DPHY_APBCFGSAIF_SYSCFG(104), 0x00000000 },
+	{ STF_DPHY_APBCFGSAIF_SYSCFG(108), 0x00000000 },
+	{ STF_DPHY_APBCFGSAIF_SYSCFG(112), 0x00000000 },
+	{ STF_DPHY_APBCFGSAIF_SYSCFG(116), 0x00000000 },
+	{ STF_DPHY_APBCFGSAIF_SYSCFG(120), 0x00000000 },
+	{ STF_DPHY_APBCFGSAIF_SYSCFG(124), 0x0000000c },
+	{ STF_DPHY_APBCFGSAIF_SYSCFG(128), 0x00000000 },
+	{ STF_DPHY_APBCFGSAIF_SYSCFG(132), 0xcc500000 },
+	{ STF_DPHY_APBCFGSAIF_SYSCFG(136), 0x000000cc },
+	{ STF_DPHY_APBCFGSAIF_SYSCFG(140), 0x00000000 },
+	{ STF_DPHY_APBCFGSAIF_SYSCFG(144), 0x00000000 },
+};
+
+static int stf_dphy_configure(struct phy *phy, union phy_configure_opts *opts)
+{
+	struct stf_dphy *dphy = phy_get_drvdata(phy);
+	const struct stf_dphy_info *info = dphy->info;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(stf_dphy_init_list); i++)
+		writel(stf_dphy_init_list[i].val,
+		       dphy->regs + stf_dphy_init_list[i].addr);
+
+	writel(FIELD_PREP(STF_DPHY_DA_CDPHY_R100_CTRL0_2D1C_EFUSE_EN, 1) |
+	       FIELD_PREP(STF_DPHY_DA_CDPHY_R100_CTRL0_2D1C_EFUSE_IN, 0x1b) |
+	       FIELD_PREP(STF_DPHY_DA_CDPHY_R100_CTRL1_2D1C_EFUSE_EN, 1) |
+	       FIELD_PREP(STF_DPHY_DA_CDPHY_R100_CTRL1_2D1C_EFUSE_IN, 0x1b),
+	       dphy->regs + STF_DPHY_APBCFGSAIF_SYSCFG(0));
+
+	writel(FIELD_PREP(STF_DPHY_DATA_BUS16_8, 0) |
+	       FIELD_PREP(STF_DPHY_DEBUG_MODE_SEL, 0x5a),
+	       dphy->regs + STF_DPHY_APBCFGSAIF_SYSCFG(184));
+
+	writel(FIELD_PREP(STF_DPHY_ENABLE_CLK, 1) |
+	       FIELD_PREP(STF_DPHY_ENABLE_CLK1, 1) |
+	       FIELD_PREP(STF_DPHY_ENABLE_LAN0, 1) |
+	       FIELD_PREP(STF_DPHY_ENABLE_LAN1, 1) |
+	       FIELD_PREP(STF_DPHY_ENABLE_LAN2, 1) |
+	       FIELD_PREP(STF_DPHY_ENABLE_LAN3, 1) |
+	       FIELD_PREP(STF_DPHY_GPI_EN, 0) |
+	       FIELD_PREP(STF_DPHY_HS_FREQ_CHANGE_CLK, 0) |
+	       FIELD_PREP(STF_DPHY_HS_FREQ_CHANGE_CLK1, 0) |
+	       FIELD_PREP(STF_DPHY_LANE_SWAP_CLK, info->maps[0]) |
+	       FIELD_PREP(STF_DPHY_LANE_SWAP_CLK1, info->maps[5]) |
+	       FIELD_PREP(STF_DPHY_LANE_SWAP_LAN0, info->maps[1]) |
+	       FIELD_PREP(STF_DPHY_LANE_SWAP_LAN1, info->maps[2]),
+	       dphy->regs + STF_DPHY_APBCFGSAIF_SYSCFG(188));
+
+	writel(FIELD_PREP(STF_DPHY_LANE_SWAP_LAN2, info->maps[3]) |
+	       FIELD_PREP(STF_DPHY_LANE_SWAP_LAN3, info->maps[4]) |
+	       FIELD_PREP(STF_DPHY_MP_TEST_EN, 0) |
+	       FIELD_PREP(STF_DPHY_MP_TEST_MODE_SEL, 0) |
+	       FIELD_PREP(STF_DPHY_PLL_CLK_SEL, 0x37c) |
+	       FIELD_PREP(STF_DPHY_PRECOUNTER_IN_CLK, 8),
+	       dphy->regs + STF_DPHY_APBCFGSAIF_SYSCFG(192));
+
+	writel(FIELD_PREP(STF_DPHY_PRECOUNTER_IN_CLK1, 8) |
+	       FIELD_PREP(STF_DPHY_PRECOUNTER_IN_LAN0, 7) |
+	       FIELD_PREP(STF_DPHY_PRECOUNTER_IN_LAN1, 7) |
+	       FIELD_PREP(STF_DPHY_PRECOUNTER_IN_LAN2, 7),
+	       dphy->regs + STF_DPHY_APBCFGSAIF_SYSCFG(196));
+
+	writel(FIELD_PREP(STF_DPHY_PRECOUNTER_IN_LAN3, 7) |
+	       FIELD_PREP(STF_DPHY_RX_1C2C_SEL, 0),
+	       dphy->regs + STF_DPHY_APBCFGSAIF_SYSCFG(200));
+
+	return 0;
+}
+
+static int stf_dphy_power_on(struct phy *phy)
+{
+	struct stf_dphy *dphy = phy_get_drvdata(phy);
+	int ret;
+
+	pm_runtime_get_sync(dphy->dev);
+
+	ret = regulator_enable(dphy->mipi_0p9);
+	if (ret)
+		return ret;
+
+	clk_set_rate(dphy->cfg_clk, 99000000);
+	clk_set_rate(dphy->ref_clk, 49500000);
+	clk_set_rate(dphy->tx_clk, 19800000);
+	reset_control_deassert(dphy->rstc);
+
+	return 0;
+}
+
+static int stf_dphy_power_off(struct phy *phy)
+{
+	struct stf_dphy *dphy = phy_get_drvdata(phy);
+
+	reset_control_assert(dphy->rstc);
+
+	regulator_disable(dphy->mipi_0p9);
+
+	pm_runtime_put_sync(dphy->dev);
+
+	return 0;
+}
+
+static const struct phy_ops stf_dphy_ops = {
+	.configure = stf_dphy_configure,
+	.power_on  = stf_dphy_power_on,
+	.power_off = stf_dphy_power_off,
+};
+
+static int stf_dphy_probe(struct platform_device *pdev)
+{
+	struct phy_provider *phy_provider;
+	struct stf_dphy *dphy;
+
+	dphy = devm_kzalloc(&pdev->dev, sizeof(*dphy), GFP_KERNEL);
+	if (!dphy)
+		return -ENOMEM;
+
+	dphy->info = of_device_get_match_data(&pdev->dev);
+
+	dev_set_drvdata(&pdev->dev, dphy);
+	dphy->dev = &pdev->dev;
+
+	dphy->regs = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(dphy->regs))
+		return PTR_ERR(dphy->regs);
+
+	dphy->cfg_clk = devm_clk_get(&pdev->dev, "cfg");
+	if (IS_ERR(dphy->cfg_clk))
+		return PTR_ERR(dphy->cfg_clk);
+
+	dphy->ref_clk = devm_clk_get(&pdev->dev, "ref");
+	if (IS_ERR(dphy->ref_clk))
+		return PTR_ERR(dphy->ref_clk);
+
+	dphy->tx_clk = devm_clk_get(&pdev->dev, "tx");
+	if (IS_ERR(dphy->tx_clk))
+		return PTR_ERR(dphy->tx_clk);
+
+	dphy->rstc = devm_reset_control_array_get_exclusive(&pdev->dev);
+	if (IS_ERR(dphy->rstc))
+		return PTR_ERR(dphy->rstc);
+
+	dphy->mipi_0p9 = devm_regulator_get(&pdev->dev, "mipi_0p9");
+	if (IS_ERR(dphy->mipi_0p9))
+		return PTR_ERR(dphy->mipi_0p9);
+
+	dphy->phy = devm_phy_create(&pdev->dev, NULL, &stf_dphy_ops);
+	if (IS_ERR(dphy->phy)) {
+		dev_err(&pdev->dev, "Failed to create PHY\n");
+		return PTR_ERR(dphy->phy);
+	}
+
+	pm_runtime_enable(&pdev->dev);
+
+	phy_set_drvdata(dphy->phy, dphy);
+	phy_provider = devm_of_phy_provider_register(&pdev->dev,
+						     of_phy_simple_xlate);
+
+	return PTR_ERR_OR_ZERO(phy_provider);
+}
+
+static const struct stf_dphy_info starfive_dphy_info = {
+	.maps = {4, 0, 1, 2, 3, 5},
+};
+
+static const struct of_device_id stf_dphy_dt_ids[] = {
+	{
+		.compatible = "starfive,jh7110-dphy-rx",
+		.data = &starfive_dphy_info,
+	},
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, stf_dphy_dt_ids);
+
+static struct platform_driver stf_dphy_driver = {
+	.probe = stf_dphy_probe,
+	.driver = {
+		.name	= "starfive-dphy-rx",
+		.of_match_table = stf_dphy_dt_ids,
+	},
+};
+module_platform_driver(stf_dphy_driver);
+
+MODULE_AUTHOR("Jack Zhu <jack.zhu@starfivetech.com>");
+MODULE_AUTHOR("Changhuang Liang <changhuang.liang@starfivetech.com>");
+MODULE_DESCRIPTION("StarFive DPHY RX driver");
+MODULE_LICENSE("GPL");
-- 
2.25.1


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[PATCH v5 3/3] riscv: dts: starfive: Add dphy rx node

[Changhuang Liang]

Add dphy rx node for the StarFive JH7110 SoC. It is used to transfer CSI
camera data.

Signed-off-by: Changhuang Liang <changhuang.liang@starfivetech.com>
---
 arch/riscv/boot/dts/starfive/jh7110.dtsi | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/arch/riscv/boot/dts/starfive/jh7110.dtsi b/arch/riscv/boot/dts/starfive/jh7110.dtsi
index 2207be7e1b01..e4241e32dd09 100644
--- a/arch/riscv/boot/dts/starfive/jh7110.dtsi
+++ b/arch/riscv/boot/dts/starfive/jh7110.dtsi
@@ -579,6 +579,19 @@ ispcrg: clock-controller@19810000 {
 			power-domains = <&pwrc JH7110_PD_ISP>;
 		};
 
+		csi_phy: phy@19820000 {
+			compatible = "starfive,jh7110-dphy-rx";
+			reg = <0x0 0x19820000 0x0 0x10000>;
+			clocks = <&ispcrg JH7110_ISPCLK_M31DPHY_CFG_IN>,
+				 <&ispcrg JH7110_ISPCLK_M31DPHY_REF_IN>,
+				 <&ispcrg JH7110_ISPCLK_M31DPHY_TX_ESC_LAN0>;
+			clock-names = "cfg", "ref", "tx";
+			resets = <&ispcrg JH7110_ISPRST_M31DPHY_HW>,
+				 <&ispcrg JH7110_ISPRST_M31DPHY_B09_AON>;
+			power-domains = <&aon_syscon JH7110_PD_DPHY_RX>;
+			#phy-cells = <0>;
+		};
+
 		voutcrg: clock-controller@295c0000 {
 			compatible = "starfive,jh7110-voutcrg";
 			reg = <0x0 0x295c0000 0x0 0x10000>;
-- 
2.25.1


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Re: [PATCH v5 1/3] dt-bindings: phy: Add starfive,jh7110-dphy-rx

[Conor Dooley]

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Hey Changhuang,

Couple of minor bits from me here, you don't need to fix them unless
the binding has to change for other reasons.


On Mon, May 29, 2023 at 05:15:01AM -0700, Changhuang Liang wrote:
> StarFive SoCs like the jh7110 use a MIPI D-PHY RX controller based on
> a M31 IP. Add a binding for it.
> 
> Signed-off-by: Changhuang Liang <changhuang.liang@starfivetech.com>
> ---
>  .../bindings/phy/starfive,jh7110-dphy-rx.yaml | 71 +++++++++++++++++++
>  1 file changed, 71 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/phy/starfive,jh7110-dphy-rx.yaml
> 
> diff --git a/Documentation/devicetree/bindings/phy/starfive,jh7110-dphy-rx.yaml b/Documentation/devicetree/bindings/phy/starfive,jh7110-dphy-rx.yaml
> new file mode 100644
> index 000000000000..46fd370188e8
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/starfive,jh7110-dphy-rx.yaml
> @@ -0,0 +1,71 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/phy/starfive,jh7110-dphy-rx.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: StarFive SoC MIPI D-PHY Rx Controller

nit: either s/SoC/JH7110/ or s/SoC//.

> +
> +maintainers:
> +  - Jack Zhu <jack.zhu@starfivetech.com>
> +  - Changhuang Liang <changhuang.liang@starfivetech.com>
> +
> +description:
> +  The StarFive SoC uses the MIPI CSI D-PHY based on M31 IP to transfer
> +  CSI camera data.

nit: "Starfive SoCs contain a MIPI CSI D-PHY based on an M31 IP, used to
transfer CSI camera data."

> +properties:
> +  compatible:
> +    const: starfive,jh7110-dphy-rx
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    items:
> +      - description: config clock
> +      - description: reference clock
> +      - description: escape mode transmit clock
> +
> +  clock-names:
> +    items:
> +      - const: cfg
> +      - const: ref
> +      - const: tx
> +
> +  resets:
> +    items:
> +      - description: DPHY_HW reset
> +      - description: DPHY_B09_ALWAYS_ON reset

I'd prefer not to have what looks like copy-paste from a datasheet
and instead a description of what they do.

Otherwise, this looks grand to me, but I don't understand the hardware
so there is no point in me leaving an R-b on this.
Hopefully Krzysztof can take a look at it in the coming days.

Thanks,
Conor.

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Re: [PATCH v5 0/3] Add JH7110 MIPI DPHY RX support

[Conor Dooley]

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On Mon, May 29, 2023 at 05:15:00AM -0700, Changhuang Liang wrote:
> This patchset adds mipi dphy rx driver for the StarFive JH7110 SoC.
> It is used to transfer CSI camera data. The series has been tested on
> the VisionFive 2 board.
> 
> This patchset should be applied after the patchset [1] [2]:
> [1] https://lore.kernel.org/all/20230518101234.143748-1-xingyu.wu@starfivetech.com/
> [2] https://lore.kernel.org/all/20230519060202.15296-1-changhuang.liang@starfivetech.com/

Are these are only relevant for the dts patch, or for the whole series?

Cheers,
Conor.

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Re: [PATCH v5 0/3] Add JH7110 MIPI DPHY RX support

[Changhuang Liang]

On 2023/5/29 22:08, Conor Dooley wrote:
> On Mon, May 29, 2023 at 05:15:00AM -0700, Changhuang Liang wrote:
>> This patchset adds mipi dphy rx driver for the StarFive JH7110 SoC.
>> It is used to transfer CSI camera data. The series has been tested on
>> the VisionFive 2 board.
>>
>> This patchset should be applied after the patchset [1] [2]:
>> [1] https://lore.kernel.org/all/20230518101234.143748-1-xingyu.wu@starfivetech.com/
>> [2] https://lore.kernel.org/all/20230519060202.15296-1-changhuang.liang@starfivetech.com/
> 
> Are these are only relevant for the dts patch, or for the whole series?
> 

[1] is clock framework, [2] is power framework. Maybe they are only relevant for the dts patch.

Thank, 
Changhuang

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Re: [PATCH v5 1/3] dt-bindings: phy: Add starfive,jh7110-dphy-rx

[Changhuang Liang]

On 2023/5/29 22:05, Conor Dooley wrote:
> Hey Changhuang,
> 
> Couple of minor bits from me here, you don't need to fix them unless
> the binding has to change for other reasons.
> 

Thanks for your comments.

[...]
>> +$id: http://devicetree.org/schemas/phy/starfive,jh7110-dphy-rx.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: StarFive SoC MIPI D-PHY Rx Controller
> 
> nit: either s/SoC/JH7110/ or s/SoC//.
> 

Changed to "StarFive JH7110 SoC MIPI D-PHY Rx Controller"?

>> +
>> +maintainers:
>> +  - Jack Zhu <jack.zhu@starfivetech.com>
>> +  - Changhuang Liang <changhuang.liang@starfivetech.com>
>> +
>> +description:
>> +  The StarFive SoC uses the MIPI CSI D-PHY based on M31 IP to transfer
>> +  CSI camera data.
> 
> nit: "Starfive SoCs contain a MIPI CSI D-PHY based on an M31 IP, used to
> transfer CSI camera data."
> 

Will fixed this.

>> +properties:
>> +  compatible:
>> +    const: starfive,jh7110-dphy-rx
[...]
>> +  resets:
>> +    items:
>> +      - description: DPHY_HW reset
>> +      - description: DPHY_B09_ALWAYS_ON reset
> 
> I'd prefer not to have what looks like copy-paste from a datasheet
> and instead a description of what they do.
> 
> Otherwise, this looks grand to me, but I don't understand the hardware
> so there is no point in me leaving an R-b on this.
> Hopefully Krzysztof can take a look at it in the coming days.
> 
I will wait for Krzysztof's comments.

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Re: [PATCH v5 1/3] dt-bindings: phy: Add starfive,jh7110-dphy-rx

[Rob Herring]

On Mon, 29 May 2023 05:15:01 -0700, Changhuang Liang wrote:
> StarFive SoCs like the jh7110 use a MIPI D-PHY RX controller based on
> a M31 IP. Add a binding for it.
> 
> Signed-off-by: Changhuang Liang <changhuang.liang@starfivetech.com>
> ---
>  .../bindings/phy/starfive,jh7110-dphy-rx.yaml | 71 +++++++++++++++++++
>  1 file changed, 71 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/phy/starfive,jh7110-dphy-rx.yaml
> 

Reviewed-by: Rob Herring <robh@kernel.org>


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Re: [PATCH v5 0/3] Add JH7110 MIPI DPHY RX support

[Changhuang Liang]

On 2023/5/29 20:15, Changhuang Liang wrote:
> This patchset adds mipi dphy rx driver for the StarFive JH7110 SoC.
> It is used to transfer CSI camera data. The series has been tested on
> the VisionFive 2 board.
> 
> This patchset should be applied after the patchset [1] [2]:
> [1] https://lore.kernel.org/all/20230518101234.143748-1-xingyu.wu@starfivetech.com/
> [2] https://lore.kernel.org/all/20230519060202.15296-1-changhuang.liang@starfivetech.com/
> 

Hi, Vinod and Kishon

Could you please help to review and give me some suggestions
for this patch series? Thank you for your time.

Best regards,
Changhuang

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Re: [PATCH v5 2/3] phy: starfive: Add mipi dphy rx support

[Vinod Koul]

On 29-05-23, 05:15, Changhuang Liang wrote:
> Add mipi dphy rx support for the StarFive JH7110 SoC. It is used to
> transfer CSI camera data.
> 
> Signed-off-by: Changhuang Liang <changhuang.liang@starfivetech.com>
> ---
>  MAINTAINERS                                 |   7 +
>  drivers/phy/Kconfig                         |   1 +
>  drivers/phy/Makefile                        |   1 +
>  drivers/phy/starfive/Kconfig                |  13 +
>  drivers/phy/starfive/Makefile               |   2 +
>  drivers/phy/starfive/phy-starfive-dphy-rx.c | 300 ++++++++++++++++++++
>  6 files changed, 324 insertions(+)
>  create mode 100644 drivers/phy/starfive/Kconfig
>  create mode 100644 drivers/phy/starfive/Makefile
>  create mode 100644 drivers/phy/starfive/phy-starfive-dphy-rx.c
> 
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 92c7076c4fed..a5fac3f015b4 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -20092,6 +20092,13 @@ S:	Maintained
>  F:	Documentation/devicetree/bindings/net/starfive,jh7110-dwmac.yaml
>  F:	drivers/net/ethernet/stmicro/stmmac/dwmac-starfive.c
>  
> +STARFIVE JH7110 DPHY RX DRIVER
> +M:	Jack Zhu <jack.zhu@starfivetech.com>
> +M:	Changhuang Liang <changhuang.liang@starfivetech.com>
> +S:	Supported
> +F:	Documentation/devicetree/bindings/phy/starfive,jh7110-dphy-rx.yaml
> +F:	drivers/phy/starfive/phy-starfive-dphy-rx.c
> +
>  STARFIVE JH7110 MMC/SD/SDIO DRIVER
>  M:	William Qiu <william.qiu@starfivetech.com>
>  S:	Supported
> diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
> index f46e3148d286..0000149edbc4 100644
> --- a/drivers/phy/Kconfig
> +++ b/drivers/phy/Kconfig
> @@ -91,6 +91,7 @@ source "drivers/phy/rockchip/Kconfig"
>  source "drivers/phy/samsung/Kconfig"
>  source "drivers/phy/socionext/Kconfig"
>  source "drivers/phy/st/Kconfig"
> +source "drivers/phy/starfive/Kconfig"
>  source "drivers/phy/sunplus/Kconfig"
>  source "drivers/phy/tegra/Kconfig"
>  source "drivers/phy/ti/Kconfig"
> diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
> index 54f312c10a40..fb3dc9de6111 100644
> --- a/drivers/phy/Makefile
> +++ b/drivers/phy/Makefile
> @@ -31,6 +31,7 @@ obj-y					+= allwinner/	\
>  					   samsung/	\
>  					   socionext/	\
>  					   st/		\
> +					   starfive/	\
>  					   sunplus/	\
>  					   tegra/	\
>  					   ti/		\
> diff --git a/drivers/phy/starfive/Kconfig b/drivers/phy/starfive/Kconfig
> new file mode 100644
> index 000000000000..f989b8ff8bcb
> --- /dev/null
> +++ b/drivers/phy/starfive/Kconfig
> @@ -0,0 +1,13 @@
> +# SPDX-License-Identifier: GPL-2.0-only
> +#
> +# Phy drivers for StarFive platforms
> +#
> +
> +config PHY_STARFIVE_DPHY_RX
> +	tristate "StarFive D-PHY RX Support"
> +	select GENERIC_PHY
> +	select GENERIC_PHY_MIPI_DPHY
> +	help
> +	  Choose this option if you have a StarFive D-PHY in your
> +	  system. If M is selected, the module will be called
> +	  phy-starfive-dphy-rx.
> diff --git a/drivers/phy/starfive/Makefile b/drivers/phy/starfive/Makefile
> new file mode 100644
> index 000000000000..7ec576cb30ae
> --- /dev/null
> +++ b/drivers/phy/starfive/Makefile
> @@ -0,0 +1,2 @@
> +# SPDX-License-Identifier: GPL-2.0
> +obj-$(CONFIG_PHY_STARFIVE_DPHY_RX)      += phy-starfive-dphy-rx.o
> diff --git a/drivers/phy/starfive/phy-starfive-dphy-rx.c b/drivers/phy/starfive/phy-starfive-dphy-rx.c
> new file mode 100644
> index 000000000000..6974ed904d0d
> --- /dev/null
> +++ b/drivers/phy/starfive/phy-starfive-dphy-rx.c
> @@ -0,0 +1,300 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * DPHY driver for the StarFive JH7110 SoC
> + *
> + * Copyright (C) 2023 StarFive Technology Co., Ltd.
> + */
> +
> +#include <linux/bitfield.h>
> +#include <linux/bitops.h>
> +#include <linux/clk.h>
> +#include <linux/io.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/phy/phy.h>
> +#include <linux/platform_device.h>
> +#include <linux/pm_runtime.h>
> +#include <linux/reset.h>
> +
> +#define STF_DPHY_APBCFGSAIF_SYSCFG(x)		(x)
> +
> +#define STF_DPHY_DA_CDPHY_R100_CTRL0_2D1C_EFUSE_EN BIT(6)
> +#define STF_DPHY_DA_CDPHY_R100_CTRL0_2D1C_EFUSE_IN GENMASK(12, 7)
> +#define STF_DPHY_DA_CDPHY_R100_CTRL1_2D1C_EFUSE_EN BIT(19)
> +#define STF_DPHY_DA_CDPHY_R100_CTRL1_2D1C_EFUSE_IN GENMASK(25, 20)
> +
> +#define STF_DPHY_DATA_BUS16_8			BIT(8)
> +#define STF_DPHY_DEBUG_MODE_SEL			GENMASK(15, 9)
> +
> +#define STF_DPHY_ENABLE_CLK			BIT(6)
> +#define STF_DPHY_ENABLE_CLK1			BIT(7)
> +#define STF_DPHY_ENABLE_LAN0			BIT(8)
> +#define STF_DPHY_ENABLE_LAN1			BIT(9)
> +#define STF_DPHY_ENABLE_LAN2			BIT(10)
> +#define STF_DPHY_ENABLE_LAN3			BIT(11)
> +#define STF_DPHY_GPI_EN				GENMASK(17, 12)
> +#define STF_DPHY_HS_FREQ_CHANGE_CLK		BIT(18)
> +#define STF_DPHY_HS_FREQ_CHANGE_CLK1		BIT(19)
> +#define STF_DPHY_LANE_SWAP_CLK			GENMASK(22, 20)
> +#define STF_DPHY_LANE_SWAP_CLK1			GENMASK(25, 23)
> +#define STF_DPHY_LANE_SWAP_LAN0			GENMASK(28, 26)
> +#define STF_DPHY_LANE_SWAP_LAN1			GENMASK(31, 29)
> +
> +#define STF_DPHY_LANE_SWAP_LAN2			GENMASK(2, 0)
> +#define STF_DPHY_LANE_SWAP_LAN3			GENMASK(5, 3)
> +#define STF_DPHY_MP_TEST_EN			BIT(6)
> +#define STF_DPHY_MP_TEST_MODE_SEL		GENMASK(11, 7)
> +#define STF_DPHY_PLL_CLK_SEL			GENMASK(21, 12)
> +#define STF_DPHY_PRECOUNTER_IN_CLK		GENMASK(29, 22)
> +
> +#define STF_DPHY_PRECOUNTER_IN_CLK1		GENMASK(7, 0)
> +#define STF_DPHY_PRECOUNTER_IN_LAN0		GENMASK(15, 8)
> +#define STF_DPHY_PRECOUNTER_IN_LAN1		GENMASK(23, 16)
> +#define STF_DPHY_PRECOUNTER_IN_LAN2		GENMASK(31, 24)
> +
> +#define STF_DPHY_PRECOUNTER_IN_LAN3		GENMASK(7, 0)
> +#define STF_DPHY_RX_1C2C_SEL			BIT(8)
> +
> +#define STF_MAP_LANES_NUM			6
> +
> +struct regval {
> +	u32 addr;
> +	u32 val;
> +};
> +
> +struct stf_dphy_info {
> +	/**
> +	 * @maps:
> +	 *
> +	 * Physical lanes and logic lanes mapping table.
> +	 *
> +	 * The default order is:
> +	 * [clk lane0, data lane 0, data lane 1, data lane 2, date lane 3, clk lane 1]
> +	 */
> +	u8 maps[STF_MAP_LANES_NUM];
> +};
> +
> +struct stf_dphy {
> +	struct device *dev;
> +	void __iomem *regs;
> +	struct clk *cfg_clk;
> +	struct clk *ref_clk;
> +	struct clk *tx_clk;
> +	struct reset_control *rstc;
> +	struct regulator *mipi_0p9;
> +	struct phy *phy;
> +	const struct stf_dphy_info *info;
> +};
> +
> +static const struct regval stf_dphy_init_list[] = {
> +	{ STF_DPHY_APBCFGSAIF_SYSCFG(4), 0x00000000 },
> +	{ STF_DPHY_APBCFGSAIF_SYSCFG(8), 0x00000000 },
> +	{ STF_DPHY_APBCFGSAIF_SYSCFG(12), 0x0000fff0 },
> +	{ STF_DPHY_APBCFGSAIF_SYSCFG(16), 0x00000000 },
> +	{ STF_DPHY_APBCFGSAIF_SYSCFG(20), 0x00000000 },
> +	{ STF_DPHY_APBCFGSAIF_SYSCFG(24), 0x00000000 },
> +	{ STF_DPHY_APBCFGSAIF_SYSCFG(28), 0x00000000 },
> +	{ STF_DPHY_APBCFGSAIF_SYSCFG(32), 0x00000000 },
> +	{ STF_DPHY_APBCFGSAIF_SYSCFG(36), 0x00000000 },
> +	{ STF_DPHY_APBCFGSAIF_SYSCFG(40), 0x00000000 },
> +	{ STF_DPHY_APBCFGSAIF_SYSCFG(40), 0x00000000 },
> +	{ STF_DPHY_APBCFGSAIF_SYSCFG(48), 0x24000000 },
> +	{ STF_DPHY_APBCFGSAIF_SYSCFG(52), 0x00000000 },
> +	{ STF_DPHY_APBCFGSAIF_SYSCFG(56), 0x00000000 },
> +	{ STF_DPHY_APBCFGSAIF_SYSCFG(60), 0x00000000 },
> +	{ STF_DPHY_APBCFGSAIF_SYSCFG(64), 0x00000000 },
> +	{ STF_DPHY_APBCFGSAIF_SYSCFG(68), 0x00000000 },
> +	{ STF_DPHY_APBCFGSAIF_SYSCFG(72), 0x00000000 },
> +	{ STF_DPHY_APBCFGSAIF_SYSCFG(76), 0x00000000 },
> +	{ STF_DPHY_APBCFGSAIF_SYSCFG(80), 0x00000000 },
> +	{ STF_DPHY_APBCFGSAIF_SYSCFG(84), 0x00000000 },
> +	{ STF_DPHY_APBCFGSAIF_SYSCFG(88), 0x00000000 },
> +	{ STF_DPHY_APBCFGSAIF_SYSCFG(92), 0x00000000 },
> +	{ STF_DPHY_APBCFGSAIF_SYSCFG(96), 0x00000000 },
> +	{ STF_DPHY_APBCFGSAIF_SYSCFG(100), 0x02000000 },
> +	{ STF_DPHY_APBCFGSAIF_SYSCFG(104), 0x00000000 },
> +	{ STF_DPHY_APBCFGSAIF_SYSCFG(108), 0x00000000 },
> +	{ STF_DPHY_APBCFGSAIF_SYSCFG(112), 0x00000000 },
> +	{ STF_DPHY_APBCFGSAIF_SYSCFG(116), 0x00000000 },
> +	{ STF_DPHY_APBCFGSAIF_SYSCFG(120), 0x00000000 },
> +	{ STF_DPHY_APBCFGSAIF_SYSCFG(124), 0x0000000c },
> +	{ STF_DPHY_APBCFGSAIF_SYSCFG(128), 0x00000000 },
> +	{ STF_DPHY_APBCFGSAIF_SYSCFG(132), 0xcc500000 },
> +	{ STF_DPHY_APBCFGSAIF_SYSCFG(136), 0x000000cc },
> +	{ STF_DPHY_APBCFGSAIF_SYSCFG(140), 0x00000000 },
> +	{ STF_DPHY_APBCFGSAIF_SYSCFG(144), 0x00000000 },
> +};
> +
> +static int stf_dphy_configure(struct phy *phy, union phy_configure_opts *opts)
> +{
> +	struct stf_dphy *dphy = phy_get_drvdata(phy);
> +	const struct stf_dphy_info *info = dphy->info;
> +	int i;
> +
> +	for (i = 0; i < ARRAY_SIZE(stf_dphy_init_list); i++)
> +		writel(stf_dphy_init_list[i].val,
> +		       dphy->regs + stf_dphy_init_list[i].addr);
> +
> +	writel(FIELD_PREP(STF_DPHY_DA_CDPHY_R100_CTRL0_2D1C_EFUSE_EN, 1) |
> +	       FIELD_PREP(STF_DPHY_DA_CDPHY_R100_CTRL0_2D1C_EFUSE_IN, 0x1b) |
> +	       FIELD_PREP(STF_DPHY_DA_CDPHY_R100_CTRL1_2D1C_EFUSE_EN, 1) |
> +	       FIELD_PREP(STF_DPHY_DA_CDPHY_R100_CTRL1_2D1C_EFUSE_IN, 0x1b),
> +	       dphy->regs + STF_DPHY_APBCFGSAIF_SYSCFG(0));
> +
> +	writel(FIELD_PREP(STF_DPHY_DATA_BUS16_8, 0) |
> +	       FIELD_PREP(STF_DPHY_DEBUG_MODE_SEL, 0x5a),
> +	       dphy->regs + STF_DPHY_APBCFGSAIF_SYSCFG(184));

bunch of magic numbers here and previous one..?

> +
> +	writel(FIELD_PREP(STF_DPHY_ENABLE_CLK, 1) |
> +	       FIELD_PREP(STF_DPHY_ENABLE_CLK1, 1) |
> +	       FIELD_PREP(STF_DPHY_ENABLE_LAN0, 1) |
> +	       FIELD_PREP(STF_DPHY_ENABLE_LAN1, 1) |
> +	       FIELD_PREP(STF_DPHY_ENABLE_LAN2, 1) |
> +	       FIELD_PREP(STF_DPHY_ENABLE_LAN3, 1) |
> +	       FIELD_PREP(STF_DPHY_GPI_EN, 0) |
> +	       FIELD_PREP(STF_DPHY_HS_FREQ_CHANGE_CLK, 0) |
> +	       FIELD_PREP(STF_DPHY_HS_FREQ_CHANGE_CLK1, 0) |
> +	       FIELD_PREP(STF_DPHY_LANE_SWAP_CLK, info->maps[0]) |
> +	       FIELD_PREP(STF_DPHY_LANE_SWAP_CLK1, info->maps[5]) |
> +	       FIELD_PREP(STF_DPHY_LANE_SWAP_LAN0, info->maps[1]) |
> +	       FIELD_PREP(STF_DPHY_LANE_SWAP_LAN1, info->maps[2]),
> +	       dphy->regs + STF_DPHY_APBCFGSAIF_SYSCFG(188));
> +
> +	writel(FIELD_PREP(STF_DPHY_LANE_SWAP_LAN2, info->maps[3]) |
> +	       FIELD_PREP(STF_DPHY_LANE_SWAP_LAN3, info->maps[4]) |
> +	       FIELD_PREP(STF_DPHY_MP_TEST_EN, 0) |
> +	       FIELD_PREP(STF_DPHY_MP_TEST_MODE_SEL, 0) |
> +	       FIELD_PREP(STF_DPHY_PLL_CLK_SEL, 0x37c) |
> +	       FIELD_PREP(STF_DPHY_PRECOUNTER_IN_CLK, 8),
> +	       dphy->regs + STF_DPHY_APBCFGSAIF_SYSCFG(192));
> +
> +	writel(FIELD_PREP(STF_DPHY_PRECOUNTER_IN_CLK1, 8) |
> +	       FIELD_PREP(STF_DPHY_PRECOUNTER_IN_LAN0, 7) |
> +	       FIELD_PREP(STF_DPHY_PRECOUNTER_IN_LAN1, 7) |
> +	       FIELD_PREP(STF_DPHY_PRECOUNTER_IN_LAN2, 7),
> +	       dphy->regs + STF_DPHY_APBCFGSAIF_SYSCFG(196));
> +
> +	writel(FIELD_PREP(STF_DPHY_PRECOUNTER_IN_LAN3, 7) |
> +	       FIELD_PREP(STF_DPHY_RX_1C2C_SEL, 0),
> +	       dphy->regs + STF_DPHY_APBCFGSAIF_SYSCFG(200));
> +
> +	return 0;
> +}
> +
> +static int stf_dphy_power_on(struct phy *phy)
> +{
> +	struct stf_dphy *dphy = phy_get_drvdata(phy);
> +	int ret;
> +
> +	pm_runtime_get_sync(dphy->dev);

no error check?

> +
> +	ret = regulator_enable(dphy->mipi_0p9);
> +	if (ret)
> +		return ret;

should you not drop the pm reference on error here?

-- 
~Vinod

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Re: [PATCH v5 2/3] phy: starfive: Add mipi dphy rx support

[Changhuang Liang]

On 2023/6/21 20:30, Vinod Koul wrote:
> On 29-05-23, 05:15, Changhuang Liang wrote:
>> +static int stf_dphy_configure(struct phy *phy, union phy_configure_opts *opts)
>> +{
>> +	struct stf_dphy *dphy = phy_get_drvdata(phy);
>> +	const struct stf_dphy_info *info = dphy->info;
>> +	int i;
>> +
>> +	for (i = 0; i < ARRAY_SIZE(stf_dphy_init_list); i++)
>> +		writel(stf_dphy_init_list[i].val,
>> +		       dphy->regs + stf_dphy_init_list[i].addr);
>> +
>> +	writel(FIELD_PREP(STF_DPHY_DA_CDPHY_R100_CTRL0_2D1C_EFUSE_EN, 1) |
>> +	       FIELD_PREP(STF_DPHY_DA_CDPHY_R100_CTRL0_2D1C_EFUSE_IN, 0x1b) |
>> +	       FIELD_PREP(STF_DPHY_DA_CDPHY_R100_CTRL1_2D1C_EFUSE_EN, 1) |
>> +	       FIELD_PREP(STF_DPHY_DA_CDPHY_R100_CTRL1_2D1C_EFUSE_IN, 0x1b),
>> +	       dphy->regs + STF_DPHY_APBCFGSAIF_SYSCFG(0));
>> +
>> +	writel(FIELD_PREP(STF_DPHY_DATA_BUS16_8, 0) |
>> +	       FIELD_PREP(STF_DPHY_DEBUG_MODE_SEL, 0x5a),
>> +	       dphy->regs + STF_DPHY_APBCFGSAIF_SYSCFG(184));
> 
> bunch of magic numbers here and previous one..?
> 

magic numbers is "1" "0x1b" "0" "0x5a"? 
If so,  I will move this two registers into stf_dphy_init_list[].
And maybe also have some magic numbers below, I will replace them will macro.

>> +
>> +	writel(FIELD_PREP(STF_DPHY_ENABLE_CLK, 1) |
>> +	       FIELD_PREP(STF_DPHY_ENABLE_CLK1, 1) |
>> +	       FIELD_PREP(STF_DPHY_ENABLE_LAN0, 1) |
>> +	       FIELD_PREP(STF_DPHY_ENABLE_LAN1, 1) |
>> +	       FIELD_PREP(STF_DPHY_ENABLE_LAN2, 1) |
>> +	       FIELD_PREP(STF_DPHY_ENABLE_LAN3, 1) |
>> +	       FIELD_PREP(STF_DPHY_GPI_EN, 0) |
>> +	       FIELD_PREP(STF_DPHY_HS_FREQ_CHANGE_CLK, 0) |
>> +	       FIELD_PREP(STF_DPHY_HS_FREQ_CHANGE_CLK1, 0) |
>> +	       FIELD_PREP(STF_DPHY_LANE_SWAP_CLK, info->maps[0]) |
>> +	       FIELD_PREP(STF_DPHY_LANE_SWAP_CLK1, info->maps[5]) |
>> +	       FIELD_PREP(STF_DPHY_LANE_SWAP_LAN0, info->maps[1]) |
>> +	       FIELD_PREP(STF_DPHY_LANE_SWAP_LAN1, info->maps[2]),
>> +	       dphy->regs + STF_DPHY_APBCFGSAIF_SYSCFG(188));
[...]
>> +
>> +	writel(FIELD_PREP(STF_DPHY_PRECOUNTER_IN_LAN3, 7) |
>> +	       FIELD_PREP(STF_DPHY_RX_1C2C_SEL, 0),
>> +	       dphy->regs + STF_DPHY_APBCFGSAIF_SYSCFG(200));
>> +
>> +	return 0;
>> +}
>> +
>> +static int stf_dphy_power_on(struct phy *phy)
>> +{
>> +	struct stf_dphy *dphy = phy_get_drvdata(phy);
>> +	int ret;
>> +
>> +	pm_runtime_get_sync(dphy->dev);
> 
> no error check?
> 

I will replace pm_runtime_get_sync with pm_runtime_resume_and_get to handle error:

	ret = pm_runtime_resume_and_get(dphy->dev);
	if (ret < 0)
		return ret;

>> +
>> +	ret = regulator_enable(dphy->mipi_0p9);
>> +	if (ret)
>> +		return ret;
> 
> should you not drop the pm reference on error here?
> 

I will add pm_runtime_put in this error handle.

Thanks for your comments.


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