Re: [PATCH 2/2] phy: mtk-mipi-csi: add driver for CSI phy

From: Chun-Kuang Hu
Date: Mon Apr 03 2023 - 06:16:16 EST

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In reply to: Julien Stephan: "Re: [PATCH 2/2] phy: mtk-mipi-csi: add driver for CSI phy"
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Hi, Julien:

Julien Stephan <jstephan@xxxxxxxxxxxx> 於 2023年4月3日週一下午3:20寫道：
>
> From: Phi-bang Nguyen <pnguyen@xxxxxxxxxxxx>
>
> This is a new driver that supports the MIPI CSI CD-PHY for mediatek
> mt8365 soc
>
> Signed-off-by: Louis Kuo <louis.kuo@xxxxxxxxxxxx>
> Signed-off-by: Phi-bang Nguyen <pnguyen@xxxxxxxxxxxx>
> [Julien Stephan: use regmap]
> [Julien Stephan: use GENMASK]
> Co-developed-by: Julien Stephan <jstephan@xxxxxxxxxxxx>
> Signed-off-by: Julien Stephan <jstephan@xxxxxxxxxxxx>
> ---
> .../bindings/phy/mediatek,csi-phy.yaml | 9 +-
> MAINTAINERS | 1 +
> drivers/phy/mediatek/Kconfig | 8 +
> drivers/phy/mediatek/Makefile | 2 +
> .../phy/mediatek/phy-mtk-mipi-csi-rx-reg.h | 435 ++++++++++++++++++
> drivers/phy/mediatek/phy-mtk-mipi-csi.c | 392 ++++++++++++++++
> 6 files changed, 845 insertions(+), 2 deletions(-)
> create mode 100644 drivers/phy/mediatek/phy-mtk-mipi-csi-rx-reg.h
> create mode 100644 drivers/phy/mediatek/phy-mtk-mipi-csi.c
>

[snip]

> +static int mtk_mipi_phy_power_on(struct phy *phy)
> +{
> + struct mtk_mipi_dphy_port *port = phy_get_drvdata(phy);
> + struct mtk_mipi_dphy *priv = port->dev;
> + struct regmap *regmap_base = port->regmap_base;
> + struct regmap *regmap_4d1c = port->regmap_4d1c;
> + int ret = 0;
> +
> + mutex_lock(&priv->lock);
> +
> + switch (port->id) {
> + case MTK_MIPI_PHY_PORT_0:
> + if (priv->ports[MTK_MIPI_PHY_PORT_0A].active ||
> + priv->ports[MTK_MIPI_PHY_PORT_0B].active)
> + ret = -EBUSY;
> + break;
> +
> + case MTK_MIPI_PHY_PORT_0A:
> + case MTK_MIPI_PHY_PORT_0B:
> + if (priv->ports[MTK_MIPI_PHY_PORT_0].active)
> + ret = -EBUSY;
> + break;
> + }
> +
> + if (!ret)
> + port->active = true;
> +
> + mutex_unlock(&priv->lock);
> +
> + if (ret < 0)
> + return ret;
> +
> + /* Set analog phy mode to DPHY */
> + if (port->is_cdphy)
> + REGMAP_BIT(regmap_base, MIPI_RX_ANA00_CSIxA,
> + RG_CSI0A_CPHY_EN, 0);
> +
> + if (port->is_4d1c) {
> + REGMAP_BIT(regmap_base, MIPI_RX_ANA00_CSIxA,
> + RG_CSIxA_DPHY_L0_CKMODE_EN, 0);
> + REGMAP_BIT(regmap_base, MIPI_RX_ANA00_CSIxA,
> + RG_CSIxA_DPHY_L0_CKSEL, 1);
> + REGMAP_BIT(regmap_base, MIPI_RX_ANA00_CSIxA,
> + RG_CSIxA_DPHY_L1_CKMODE_EN, 0);
> + REGMAP_BIT(regmap_base, MIPI_RX_ANA00_CSIxA,
> + RG_CSIxA_DPHY_L1_CKSEL, 1);
> + REGMAP_BIT(regmap_base, MIPI_RX_ANA00_CSIxA,
> + RG_CSIxA_DPHY_L2_CKMODE_EN, 1);
> + REGMAP_BIT(regmap_base, MIPI_RX_ANA00_CSIxA,
> + RG_CSIxA_DPHY_L2_CKSEL, 1);
> + } else {
> + REGMAP_BIT(regmap_base, MIPI_RX_ANA00_CSIxA,
> + RG_CSIxA_DPHY_L0_CKMODE_EN, 0);
> + REGMAP_BIT(regmap_base, MIPI_RX_ANA00_CSIxA,
> + RG_CSIxA_DPHY_L0_CKSEL, 0);
> + REGMAP_BIT(regmap_base, MIPI_RX_ANA00_CSIxA,
> + RG_CSIxA_DPHY_L1_CKMODE_EN, 1);
> + REGMAP_BIT(regmap_base, MIPI_RX_ANA00_CSIxA,
> + RG_CSIxA_DPHY_L1_CKSEL, 0);
> + REGMAP_BIT(regmap_base, MIPI_RX_ANA00_CSIxA,
> + RG_CSIxA_DPHY_L2_CKMODE_EN, 0);
> + REGMAP_BIT(regmap_base, MIPI_RX_ANA00_CSIxA,
> + RG_CSIxA_DPHY_L2_CKSEL, 0);
> + }
> +
> + if (port->is_4d1c) {
> + if (port->is_cdphy)
> + REGMAP_BIT(regmap_4d1c, MIPI_RX_ANA00_CSIxA,
> + RG_CSI0A_CPHY_EN, 0);
> +
> + REGMAP_BIT(regmap_4d1c, MIPI_RX_ANA00_CSIxA,
> + RG_CSIxA_DPHY_L0_CKMODE_EN, 0);
> + REGMAP_BIT(regmap_4d1c, MIPI_RX_ANA00_CSIxA,
> + RG_CSIxA_DPHY_L0_CKSEL, 1);
> + REGMAP_BIT(regmap_4d1c, MIPI_RX_ANA00_CSIxA,
> + RG_CSIxA_DPHY_L1_CKMODE_EN, 0);
> + REGMAP_BIT(regmap_4d1c, MIPI_RX_ANA00_CSIxA,
> + RG_CSIxA_DPHY_L1_CKSEL, 1);
> + REGMAP_BIT(regmap_4d1c, MIPI_RX_ANA00_CSIxA,
> + RG_CSIxA_DPHY_L2_CKMODE_EN, 0);
> + REGMAP_BIT(regmap_4d1c, MIPI_RX_ANA00_CSIxA,
> + RG_CSIxA_DPHY_L2_CKSEL, 1);
> + }
> +
> + /* Byte clock invert */
> + REGMAP_BIT(regmap_base, MIPI_RX_ANAA8_CSIxA,
> + RG_CSIxA_CDPHY_L0_T0_BYTECK_INVERT, 1);
> + REGMAP_BIT(regmap_base, MIPI_RX_ANAA8_CSIxA,
> + RG_CSIxA_DPHY_L1_BYTECK_INVERT, 1);
> + REGMAP_BIT(regmap_base, MIPI_RX_ANAA8_CSIxA,
> + RG_CSIxA_CDPHY_L2_T1_BYTECK_INVERT, 1);
> +
> + if (port->is_4d1c) {
> + REGMAP_BIT(regmap_4d1c, MIPI_RX_ANAA8_CSIxA,
> + RG_CSIxA_CDPHY_L0_T0_BYTECK_INVERT, 1);
> + REGMAP_BIT(regmap_4d1c, MIPI_RX_ANAA8_CSIxA,
> + RG_CSIxA_DPHY_L1_BYTECK_INVERT, 1);
> + REGMAP_BIT(regmap_4d1c, MIPI_RX_ANAA8_CSIxA,
> + RG_CSIxA_CDPHY_L2_T1_BYTECK_INVERT, 1);
> + }
> +
> + /* Start ANA EQ tuning */
> + if (port->is_cdphy) {
> + REGMAP_BIT(regmap_base, MIPI_RX_ANA18_CSIxA,
> + RG_CSI0A_L0_T0AB_EQ_IS, 1);
> + REGMAP_BIT(regmap_base, MIPI_RX_ANA18_CSIxA,
> + RG_CSI0A_L0_T0AB_EQ_BW, 1);
> + REGMAP_BIT(regmap_base, MIPI_RX_ANA1C_CSIxA,
> + RG_CSI0A_L1_T1AB_EQ_IS, 1);
> + REGMAP_BIT(regmap_base, MIPI_RX_ANA1C_CSIxA,
> + RG_CSI0A_L1_T1AB_EQ_BW, 1);
> + REGMAP_BIT(regmap_base, MIPI_RX_ANA20_CSI0A,
> + RG_CSI0A_L2_T1BC_EQ_IS, 1);
> + REGMAP_BIT(regmap_base, MIPI_RX_ANA20_CSI0A,
> + RG_CSI0A_L2_T1BC_EQ_BW, 1);
> +
> + if (port->is_4d1c) {
> + REGMAP_BIT(regmap_4d1c, MIPI_RX_ANA18_CSIxA,
> + RG_CSI0A_L0_T0AB_EQ_IS, 1);
> + REGMAP_BIT(regmap_4d1c, MIPI_RX_ANA18_CSIxA,
> + RG_CSI0A_L0_T0AB_EQ_BW, 1);
> + REGMAP_BIT(regmap_4d1c, MIPI_RX_ANA1C_CSIxA,
> + RG_CSI0A_L1_T1AB_EQ_IS, 1);
> + REGMAP_BIT(regmap_4d1c, MIPI_RX_ANA1C_CSIxA,
> + RG_CSI0A_L1_T1AB_EQ_BW, 1);
> + REGMAP_BIT(regmap_4d1c, MIPI_RX_ANA20_CSI0A,
> + RG_CSI0A_L2_T1BC_EQ_IS, 1);
> + REGMAP_BIT(regmap_4d1c, MIPI_RX_ANA20_CSI0A,
> + RG_CSI0A_L2_T1BC_EQ_BW, 1);
> + }
> + } else {
> + REGMAP_BIT(regmap_base, MIPI_RX_ANA18_CSIxA,
> + RG_CSI1A_L0_EQ_IS, 1);
> + REGMAP_BIT(regmap_base, MIPI_RX_ANA18_CSIxA,
> + RG_CSI1A_L0_EQ_BW, 1);
> + REGMAP_BIT(regmap_base, MIPI_RX_ANA18_CSIxA,
> + RG_CSI1A_L1_EQ_IS, 1);
> + REGMAP_BIT(regmap_base, MIPI_RX_ANA18_CSIxA,
> + RG_CSI1A_L1_EQ_BW, 1);
> + REGMAP_BIT(regmap_base, MIPI_RX_ANA1C_CSIxA,
> + RG_CSI1A_L2_EQ_IS, 1);
> + REGMAP_BIT(regmap_base, MIPI_RX_ANA1C_CSIxA,
> + RG_CSI1A_L2_EQ_BW, 1);
> +
> + if (port->is_4d1c) {
> + REGMAP_BIT(regmap_4d1c, MIPI_RX_ANA18_CSIxA,
> + RG_CSI1A_L0_EQ_IS, 1);

RG_CSI1A_L0_EQ_IS is identical to RG_CSI0A_L0_T0AB_EQ_IS, and ditto
for below register. I think the function of each bitwise register is
the same. Define only one copy of the these register, don't duplicate
the same thing.

Regards,
Chun-Kuang.

> + REGMAP_BIT(regmap_4d1c, MIPI_RX_ANA18_CSIxA,
> + RG_CSI1A_L0_EQ_BW, 1);
> + REGMAP_BIT(regmap_4d1c, MIPI_RX_ANA18_CSIxA,
> + RG_CSI1A_L1_EQ_IS, 1);
> + REGMAP_BIT(regmap_4d1c, MIPI_RX_ANA18_CSIxA,
> + RG_CSI1A_L1_EQ_BW, 1);
> + REGMAP_BIT(regmap_4d1c, MIPI_RX_ANA1C_CSIxA,
> + RG_CSI1A_L2_EQ_IS, 1);
> + REGMAP_BIT(regmap_4d1c, MIPI_RX_ANA1C_CSIxA,
> + RG_CSI1A_L2_EQ_BW, 1);
> + }
> + }
> +
> + /* End ANA EQ tuning */
> + regmap_write(regmap_base, MIPI_RX_ANA40_CSIxA, 0x90);
> +
> + REGMAP_BIT(regmap_base, MIPI_RX_ANA24_CSIxA,
> + RG_CSIxA_RESERVE, 0x40);
> + if (port->is_4d1c)
> + REGMAP_BIT(regmap_4d1c, MIPI_RX_ANA24_CSIxA,
> + RG_CSIxA_RESERVE, 0x40);
> + REGMAP_BIT(regmap_base, MIPI_RX_WRAPPER80_CSIxA,
> + CSR_CSI_RST_MODE, 0);
> + if (port->is_4d1c)
> + REGMAP_BIT(regmap_4d1c, MIPI_RX_WRAPPER80_CSIxA,
> + CSR_CSI_RST_MODE, 0);
> + /* ANA power on */
> + REGMAP_BIT(regmap_base, MIPI_RX_ANA00_CSIxA,
> + RG_CSIxA_BG_CORE_EN, 1);
> + if (port->is_4d1c)
> + REGMAP_BIT(regmap_4d1c, MIPI_RX_ANA00_CSIxA,
> + RG_CSIxA_BG_CORE_EN, 1);
> + usleep_range(20, 40);
> + REGMAP_BIT(regmap_base, MIPI_RX_ANA00_CSIxA,
> + RG_CSIxA_BG_LPF_EN, 1);
> + if (port->is_4d1c)
> + REGMAP_BIT(regmap_4d1c, MIPI_RX_ANA00_CSIxA,
> + RG_CSIxA_BG_LPF_EN, 1);
> +
> + return 0;
> +}
> +

Next message: James Clark: "Re: [PATCH v3 07/13] coresight: Store pointers to connections rather than an array of them"
Previous message: Krzysztof Kozlowski: "Re: linux-next: build failure after merge of the mediatek tree"
In reply to: Julien Stephan: "Re: [PATCH 2/2] phy: mtk-mipi-csi: add driver for CSI phy"
Next in thread: Chun-Kuang Hu: "Re: [PATCH 2/2] phy: mtk-mipi-csi: add driver for CSI phy"
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