| Message ID | 20220523104758.29531-18-granquet@baylibre.com |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | drm/mediatek: Add mt8195 DisplayPort driver | expand |
On 23-05-22, 12:47, Guillaume Ranquet wrote: > From: Markus Schneider-Pargmann <msp@baylibre.com> > > This is a new driver that supports the integrated DisplayPort phy for > mediatek SoCs, especially the mt8195. The phy is integrated into the > DisplayPort controller and will be created by the mtk-dp driver. This > driver expects a struct regmap to be able to work on the same registers > as the DisplayPort controller. It sets the device data to be the struct > phy so that the DisplayPort controller can easily work with it. > > The driver does not have any devicetree bindings because the datasheet > does not list the controller and the phy as distinct units. > > The interaction with the controller can be covered by the configure > callback of the phy framework and its displayport parameters. I must admit that I have missed previous iteration of this driver. This is a standalone phy driver, pls split and submit this and we can get this merged... > > Signed-off-by: Markus Schneider-Pargmann <msp@baylibre.com> > Signed-off-by: Guillaume Ranquet <granquet@baylibre.com> > --- > MAINTAINERS | 1 + > drivers/phy/mediatek/Kconfig | 8 ++ > drivers/phy/mediatek/Makefile | 1 + > drivers/phy/mediatek/phy-mtk-dp.c | 200 ++++++++++++++++++++++++++++++ > 4 files changed, 210 insertions(+) > create mode 100644 drivers/phy/mediatek/phy-mtk-dp.c > > diff --git a/MAINTAINERS b/MAINTAINERS > index 4cc47b2dbdc9..bfca96469d80 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -6604,6 +6604,7 @@ L: linux-mediatek@lists.infradead.org (moderated for non-subscribers) > S: Supported > F: Documentation/devicetree/bindings/display/mediatek/ > F: drivers/gpu/drm/mediatek/ > +F: drivers/phy/mediatek/phy-mtk-dp.c > F: drivers/phy/mediatek/phy-mtk-hdmi* > F: drivers/phy/mediatek/phy-mtk-mipi* > > diff --git a/drivers/phy/mediatek/Kconfig b/drivers/phy/mediatek/Kconfig > index 55f8e6c048ab..f7ec86059049 100644 > --- a/drivers/phy/mediatek/Kconfig > +++ b/drivers/phy/mediatek/Kconfig > @@ -55,3 +55,11 @@ config PHY_MTK_MIPI_DSI > select GENERIC_PHY > help > Support MIPI DSI for Mediatek SoCs. > + > +config PHY_MTK_DP > + tristate "MediaTek DP-PHY Driver" > + depends on ARCH_MEDIATEK || COMPILE_TEST > + depends on OF > + select GENERIC_PHY > + help > + Support DisplayPort PHY for Mediatek SoCs. > diff --git a/drivers/phy/mediatek/Makefile b/drivers/phy/mediatek/Makefile > index ace660fbed3a..4ba1e0650434 100644 > --- a/drivers/phy/mediatek/Makefile > +++ b/drivers/phy/mediatek/Makefile > @@ -3,6 +3,7 @@ > # Makefile for the phy drivers. > # > > +obj-$(CONFIG_PHY_MTK_DP) += phy-mtk-dp.o > obj-$(CONFIG_PHY_MTK_TPHY) += phy-mtk-tphy.o > obj-$(CONFIG_PHY_MTK_UFS) += phy-mtk-ufs.o > obj-$(CONFIG_PHY_MTK_XSPHY) += phy-mtk-xsphy.o > diff --git a/drivers/phy/mediatek/phy-mtk-dp.c b/drivers/phy/mediatek/phy-mtk-dp.c > new file mode 100644 > index 000000000000..6f29854f0c2f > --- /dev/null > +++ b/drivers/phy/mediatek/phy-mtk-dp.c > @@ -0,0 +1,200 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * MediaTek DisplayPort PHY driver > + * > + * Copyright (c) 2021 BayLibre 2022 now > + * Author: Markus Schneider-Pargmann <msp@baylibre.com> use MODULE_AUTHOR() > + */ > + > +#include <linux/delay.h> > +#include <linux/io.h> > +#include <linux/mfd/syscon.h> > +#include <linux/of.h> > +#include <linux/phy/phy.h> > +#include <linux/platform_device.h> > +#include <linux/regmap.h> > + > +#define PHY_OFFSET 0x1000 > + > +#define MTK_DP_PHY_DIG_PLL_CTL_1 (PHY_OFFSET + 0x14) > +#define TPLL_SSC_EN BIT(3) > + > +#define MTK_DP_PHY_DIG_BIT_RATE (PHY_OFFSET + 0x3C) > +#define BIT_RATE_RBR 0 > +#define BIT_RATE_HBR 1 > +#define BIT_RATE_HBR2 2 > +#define BIT_RATE_HBR3 3 > + > +#define MTK_DP_PHY_DIG_SW_RST (PHY_OFFSET + 0x38) > +#define DP_GLB_SW_RST_PHYD BIT(0) > + > +#define MTK_DP_LANE0_DRIVING_PARAM_3 (PHY_OFFSET + 0x138) > +#define MTK_DP_LANE1_DRIVING_PARAM_3 (PHY_OFFSET + 0x238) > +#define MTK_DP_LANE2_DRIVING_PARAM_3 (PHY_OFFSET + 0x338) > +#define MTK_DP_LANE3_DRIVING_PARAM_3 (PHY_OFFSET + 0x438) > +#define XTP_LN_TX_LCTXC0_SW0_PRE0_DEFAULT BIT(4) > +#define XTP_LN_TX_LCTXC0_SW0_PRE1_DEFAULT ((BIT(2) | BIT(4)) << 8) Sound like BIT(10) and BIT (12), no? > +#define XTP_LN_TX_LCTXC0_SW0_PRE2_DEFAULT GENMASK(20, 19) > +#define XTP_LN_TX_LCTXC0_SW0_PRE3_DEFAULT GENMASK(29, 29) > +#define DRIVING_PARAM_3_DEFAULT (XTP_LN_TX_LCTXC0_SW0_PRE0_DEFAULT | \ > + XTP_LN_TX_LCTXC0_SW0_PRE1_DEFAULT | \ > + XTP_LN_TX_LCTXC0_SW0_PRE2_DEFAULT | \ > + XTP_LN_TX_LCTXC0_SW0_PRE3_DEFAULT) > + > +#define XTP_LN_TX_LCTXC0_SW1_PRE0_DEFAULT GENMASK(4, 3) > +#define XTP_LN_TX_LCTXC0_SW1_PRE1_DEFAULT GENMASK(12, 9) > +#define XTP_LN_TX_LCTXC0_SW1_PRE2_DEFAULT ((BIT(2) | BIT(5)) << 16) Here too > +#define XTP_LN_TX_LCTXC0_SW2_PRE0_DEFAULT GENMASK(29, 29) > +#define DRIVING_PARAM_4_DEFAULT (XTP_LN_TX_LCTXC0_SW1_PRE0_DEFAULT | \ > + XTP_LN_TX_LCTXC0_SW1_PRE1_DEFAULT | \ > + XTP_LN_TX_LCTXC0_SW1_PRE2_DEFAULT | \ > + XTP_LN_TX_LCTXC0_SW2_PRE0_DEFAULT) > + > +#define XTP_LN_TX_LCTXC0_SW2_PRE1_DEFAULT (BIT(3) | BIT(5)) > +#define XTP_LN_TX_LCTXC0_SW3_PRE0_DEFAULT GENMASK(13, 12) > +#define DRIVING_PARAM_5_DEFAULT (XTP_LN_TX_LCTXC0_SW2_PRE1_DEFAULT | \ > + XTP_LN_TX_LCTXC0_SW3_PRE0_DEFAULT) > + > +#define XTP_LN_TX_LCTXCP1_SW0_PRE0_DEFAULT 0 > +#define XTP_LN_TX_LCTXCP1_SW0_PRE1_DEFAULT GENMASK(10, 10) > +#define XTP_LN_TX_LCTXCP1_SW0_PRE2_DEFAULT GENMASK(19, 19) > +#define XTP_LN_TX_LCTXCP1_SW0_PRE3_DEFAULT GENMASK(28, 28) > +#define DRIVING_PARAM_6_DEFAULT (XTP_LN_TX_LCTXCP1_SW0_PRE0_DEFAULT | \ > + XTP_LN_TX_LCTXCP1_SW0_PRE1_DEFAULT | \ > + XTP_LN_TX_LCTXCP1_SW0_PRE2_DEFAULT | \ > + XTP_LN_TX_LCTXCP1_SW0_PRE3_DEFAULT) > + > +#define XTP_LN_TX_LCTXCP1_SW1_PRE0_DEFAULT 0 > +#define XTP_LN_TX_LCTXCP1_SW1_PRE1_DEFAULT GENMASK(10, 9) > +#define XTP_LN_TX_LCTXCP1_SW1_PRE2_DEFAULT GENMASK(19, 18) > +#define XTP_LN_TX_LCTXCP1_SW2_PRE0_DEFAULT 0 > +#define DRIVING_PARAM_7_DEFAULT (XTP_LN_TX_LCTXCP1_SW1_PRE0_DEFAULT | \ > + XTP_LN_TX_LCTXCP1_SW1_PRE1_DEFAULT | \ > + XTP_LN_TX_LCTXCP1_SW1_PRE2_DEFAULT | \ > + XTP_LN_TX_LCTXCP1_SW2_PRE0_DEFAULT) > + > +#define XTP_LN_TX_LCTXCP1_SW2_PRE1_DEFAULT GENMASK(3, 3) > +#define XTP_LN_TX_LCTXCP1_SW3_PRE0_DEFAULT 0 > +#define DRIVING_PARAM_8_DEFAULT (XTP_LN_TX_LCTXCP1_SW2_PRE1_DEFAULT | \ > + XTP_LN_TX_LCTXCP1_SW3_PRE0_DEFAULT) > + > +struct mtk_dp_phy { > + struct regmap *regs; > +}; > + > +static int mtk_dp_phy_init(struct phy *phy) > +{ > + struct mtk_dp_phy *dp_phy = phy_get_drvdata(phy); > + u32 driving_params[] = { > + DRIVING_PARAM_3_DEFAULT, > + DRIVING_PARAM_4_DEFAULT, > + DRIVING_PARAM_5_DEFAULT, > + DRIVING_PARAM_6_DEFAULT, > + DRIVING_PARAM_7_DEFAULT, > + DRIVING_PARAM_8_DEFAULT > + }; > + > + regmap_bulk_write(dp_phy->regs, MTK_DP_LANE0_DRIVING_PARAM_3, > + driving_params, ARRAY_SIZE(driving_params)); > + regmap_bulk_write(dp_phy->regs, MTK_DP_LANE1_DRIVING_PARAM_3, > + driving_params, ARRAY_SIZE(driving_params)); > + regmap_bulk_write(dp_phy->regs, MTK_DP_LANE2_DRIVING_PARAM_3, > + driving_params, ARRAY_SIZE(driving_params)); > + regmap_bulk_write(dp_phy->regs, MTK_DP_LANE3_DRIVING_PARAM_3, > + driving_params, ARRAY_SIZE(driving_params)); > + > + return 0; > +} > + > +static int mtk_dp_phy_configure(struct phy *phy, union phy_configure_opts *opts) > +{ > + struct mtk_dp_phy *dp_phy = phy_get_drvdata(phy); > + u32 val; > + > + if (opts->dp.set_rate) { > + switch (opts->dp.link_rate) { > + default: > + dev_err(&phy->dev, > + "Implementation error, unknown linkrate %x\n", > + opts->dp.link_rate); > + return -EINVAL; > + case 1620: > + val = BIT_RATE_RBR; > + break; > + case 2700: > + val = BIT_RATE_HBR; > + break; > + case 5400: > + val = BIT_RATE_HBR2; > + break; > + case 8100: > + val = BIT_RATE_HBR3; > + break; > + } > + regmap_write(dp_phy->regs, MTK_DP_PHY_DIG_BIT_RATE, val); > + } > + > + regmap_update_bits(dp_phy->regs, MTK_DP_PHY_DIG_PLL_CTL_1, > + TPLL_SSC_EN, opts->dp.ssc ? TPLL_SSC_EN : 0); > + > + return 0; > +} > + > +static int mtk_dp_phy_reset(struct phy *phy) > +{ > + struct mtk_dp_phy *dp_phy = phy_get_drvdata(phy); > + > + regmap_update_bits(dp_phy->regs, MTK_DP_PHY_DIG_SW_RST, > + DP_GLB_SW_RST_PHYD, 0); > + usleep_range(50, 200); > + regmap_update_bits(dp_phy->regs, MTK_DP_PHY_DIG_SW_RST, > + DP_GLB_SW_RST_PHYD, 1); > + > + return 0; > +} > + > +static const struct phy_ops mtk_dp_phy_dev_ops = { > + .init = mtk_dp_phy_init, > + .configure = mtk_dp_phy_configure, > + .reset = mtk_dp_phy_reset, > + .owner = THIS_MODULE, > +}; > + > +static int mtk_dp_phy_probe(struct platform_device *pdev) > +{ > + struct device *dev = &pdev->dev; > + struct mtk_dp_phy *dp_phy; > + struct phy *phy; > + struct regmap *regs; > + > + regs = *(struct regmap **)dev->platform_data; > + if (!regs) > + return dev_err_probe(dev, EINVAL, "No data passed, requires struct regmap**\n"); > + > + dp_phy = devm_kzalloc(dev, sizeof(*dp_phy), GFP_KERNEL); > + if (!dp_phy) > + return -ENOMEM; > + > + dp_phy->regs = regs; > + phy = devm_phy_create(dev, NULL, &mtk_dp_phy_dev_ops); > + if (IS_ERR(phy)) > + return dev_err_probe(dev, PTR_ERR(phy), "Failed to create DP PHY\n"); > + > + phy_set_drvdata(phy, dp_phy); > + if (!dev->of_node) > + phy_create_lookup(phy, "dp", dev_name(dev)); > + > + return 0; > +} > + > +struct platform_driver mtk_dp_phy_driver = { > + .probe = mtk_dp_phy_probe, > + .driver = { > + .name = "mediatek-dp-phy", > + }, > +}; > +module_platform_driver(mtk_dp_phy_driver); > + > +MODULE_AUTHOR("Markus Schneider-Pargmann <msp@baylibre.com>"); > +MODULE_DESCRIPTION("MediaTek DP PHY Driver"); > +MODULE_LICENSE("GPL"); > -- > 2.35.1
diff --git a/MAINTAINERS b/MAINTAINERS index 4cc47b2dbdc9..bfca96469d80 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -6604,6 +6604,7 @@ L: linux-mediatek@lists.infradead.org (moderated for non-subscribers) S: Supported F: Documentation/devicetree/bindings/display/mediatek/ F: drivers/gpu/drm/mediatek/ +F: drivers/phy/mediatek/phy-mtk-dp.c F: drivers/phy/mediatek/phy-mtk-hdmi* F: drivers/phy/mediatek/phy-mtk-mipi* diff --git a/drivers/phy/mediatek/Kconfig b/drivers/phy/mediatek/Kconfig index 55f8e6c048ab..f7ec86059049 100644 --- a/drivers/phy/mediatek/Kconfig +++ b/drivers/phy/mediatek/Kconfig @@ -55,3 +55,11 @@ config PHY_MTK_MIPI_DSI select GENERIC_PHY help Support MIPI DSI for Mediatek SoCs. + +config PHY_MTK_DP + tristate "MediaTek DP-PHY Driver" + depends on ARCH_MEDIATEK || COMPILE_TEST + depends on OF + select GENERIC_PHY + help + Support DisplayPort PHY for Mediatek SoCs. diff --git a/drivers/phy/mediatek/Makefile b/drivers/phy/mediatek/Makefile index ace660fbed3a..4ba1e0650434 100644 --- a/drivers/phy/mediatek/Makefile +++ b/drivers/phy/mediatek/Makefile @@ -3,6 +3,7 @@ # Makefile for the phy drivers. # +obj-$(CONFIG_PHY_MTK_DP) += phy-mtk-dp.o obj-$(CONFIG_PHY_MTK_TPHY) += phy-mtk-tphy.o obj-$(CONFIG_PHY_MTK_UFS) += phy-mtk-ufs.o obj-$(CONFIG_PHY_MTK_XSPHY) += phy-mtk-xsphy.o diff --git a/drivers/phy/mediatek/phy-mtk-dp.c b/drivers/phy/mediatek/phy-mtk-dp.c new file mode 100644 index 000000000000..6f29854f0c2f --- /dev/null +++ b/drivers/phy/mediatek/phy-mtk-dp.c @@ -0,0 +1,200 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * MediaTek DisplayPort PHY driver + * + * Copyright (c) 2021 BayLibre + * Author: Markus Schneider-Pargmann <msp@baylibre.com> + */ + +#include <linux/delay.h> +#include <linux/io.h> +#include <linux/mfd/syscon.h> +#include <linux/of.h> +#include <linux/phy/phy.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> + +#define PHY_OFFSET 0x1000 + +#define MTK_DP_PHY_DIG_PLL_CTL_1 (PHY_OFFSET + 0x14) +#define TPLL_SSC_EN BIT(3) + +#define MTK_DP_PHY_DIG_BIT_RATE (PHY_OFFSET + 0x3C) +#define BIT_RATE_RBR 0 +#define BIT_RATE_HBR 1 +#define BIT_RATE_HBR2 2 +#define BIT_RATE_HBR3 3 + +#define MTK_DP_PHY_DIG_SW_RST (PHY_OFFSET + 0x38) +#define DP_GLB_SW_RST_PHYD BIT(0) + +#define MTK_DP_LANE0_DRIVING_PARAM_3 (PHY_OFFSET + 0x138) +#define MTK_DP_LANE1_DRIVING_PARAM_3 (PHY_OFFSET + 0x238) +#define MTK_DP_LANE2_DRIVING_PARAM_3 (PHY_OFFSET + 0x338) +#define MTK_DP_LANE3_DRIVING_PARAM_3 (PHY_OFFSET + 0x438) +#define XTP_LN_TX_LCTXC0_SW0_PRE0_DEFAULT BIT(4) +#define XTP_LN_TX_LCTXC0_SW0_PRE1_DEFAULT ((BIT(2) | BIT(4)) << 8) +#define XTP_LN_TX_LCTXC0_SW0_PRE2_DEFAULT GENMASK(20, 19) +#define XTP_LN_TX_LCTXC0_SW0_PRE3_DEFAULT GENMASK(29, 29) +#define DRIVING_PARAM_3_DEFAULT (XTP_LN_TX_LCTXC0_SW0_PRE0_DEFAULT | \ + XTP_LN_TX_LCTXC0_SW0_PRE1_DEFAULT | \ + XTP_LN_TX_LCTXC0_SW0_PRE2_DEFAULT | \ + XTP_LN_TX_LCTXC0_SW0_PRE3_DEFAULT) + +#define XTP_LN_TX_LCTXC0_SW1_PRE0_DEFAULT GENMASK(4, 3) +#define XTP_LN_TX_LCTXC0_SW1_PRE1_DEFAULT GENMASK(12, 9) +#define XTP_LN_TX_LCTXC0_SW1_PRE2_DEFAULT ((BIT(2) | BIT(5)) << 16) +#define XTP_LN_TX_LCTXC0_SW2_PRE0_DEFAULT GENMASK(29, 29) +#define DRIVING_PARAM_4_DEFAULT (XTP_LN_TX_LCTXC0_SW1_PRE0_DEFAULT | \ + XTP_LN_TX_LCTXC0_SW1_PRE1_DEFAULT | \ + XTP_LN_TX_LCTXC0_SW1_PRE2_DEFAULT | \ + XTP_LN_TX_LCTXC0_SW2_PRE0_DEFAULT) + +#define XTP_LN_TX_LCTXC0_SW2_PRE1_DEFAULT (BIT(3) | BIT(5)) +#define XTP_LN_TX_LCTXC0_SW3_PRE0_DEFAULT GENMASK(13, 12) +#define DRIVING_PARAM_5_DEFAULT (XTP_LN_TX_LCTXC0_SW2_PRE1_DEFAULT | \ + XTP_LN_TX_LCTXC0_SW3_PRE0_DEFAULT) + +#define XTP_LN_TX_LCTXCP1_SW0_PRE0_DEFAULT 0 +#define XTP_LN_TX_LCTXCP1_SW0_PRE1_DEFAULT GENMASK(10, 10) +#define XTP_LN_TX_LCTXCP1_SW0_PRE2_DEFAULT GENMASK(19, 19) +#define XTP_LN_TX_LCTXCP1_SW0_PRE3_DEFAULT GENMASK(28, 28) +#define DRIVING_PARAM_6_DEFAULT (XTP_LN_TX_LCTXCP1_SW0_PRE0_DEFAULT | \ + XTP_LN_TX_LCTXCP1_SW0_PRE1_DEFAULT | \ + XTP_LN_TX_LCTXCP1_SW0_PRE2_DEFAULT | \ + XTP_LN_TX_LCTXCP1_SW0_PRE3_DEFAULT) + +#define XTP_LN_TX_LCTXCP1_SW1_PRE0_DEFAULT 0 +#define XTP_LN_TX_LCTXCP1_SW1_PRE1_DEFAULT GENMASK(10, 9) +#define XTP_LN_TX_LCTXCP1_SW1_PRE2_DEFAULT GENMASK(19, 18) +#define XTP_LN_TX_LCTXCP1_SW2_PRE0_DEFAULT 0 +#define DRIVING_PARAM_7_DEFAULT (XTP_LN_TX_LCTXCP1_SW1_PRE0_DEFAULT | \ + XTP_LN_TX_LCTXCP1_SW1_PRE1_DEFAULT | \ + XTP_LN_TX_LCTXCP1_SW1_PRE2_DEFAULT | \ + XTP_LN_TX_LCTXCP1_SW2_PRE0_DEFAULT) + +#define XTP_LN_TX_LCTXCP1_SW2_PRE1_DEFAULT GENMASK(3, 3) +#define XTP_LN_TX_LCTXCP1_SW3_PRE0_DEFAULT 0 +#define DRIVING_PARAM_8_DEFAULT (XTP_LN_TX_LCTXCP1_SW2_PRE1_DEFAULT | \ + XTP_LN_TX_LCTXCP1_SW3_PRE0_DEFAULT) + +struct mtk_dp_phy { + struct regmap *regs; +}; + +static int mtk_dp_phy_init(struct phy *phy) +{ + struct mtk_dp_phy *dp_phy = phy_get_drvdata(phy); + u32 driving_params[] = { + DRIVING_PARAM_3_DEFAULT, + DRIVING_PARAM_4_DEFAULT, + DRIVING_PARAM_5_DEFAULT, + DRIVING_PARAM_6_DEFAULT, + DRIVING_PARAM_7_DEFAULT, + DRIVING_PARAM_8_DEFAULT + }; + + regmap_bulk_write(dp_phy->regs, MTK_DP_LANE0_DRIVING_PARAM_3, + driving_params, ARRAY_SIZE(driving_params)); + regmap_bulk_write(dp_phy->regs, MTK_DP_LANE1_DRIVING_PARAM_3, + driving_params, ARRAY_SIZE(driving_params)); + regmap_bulk_write(dp_phy->regs, MTK_DP_LANE2_DRIVING_PARAM_3, + driving_params, ARRAY_SIZE(driving_params)); + regmap_bulk_write(dp_phy->regs, MTK_DP_LANE3_DRIVING_PARAM_3, + driving_params, ARRAY_SIZE(driving_params)); + + return 0; +} + +static int mtk_dp_phy_configure(struct phy *phy, union phy_configure_opts *opts) +{ + struct mtk_dp_phy *dp_phy = phy_get_drvdata(phy); + u32 val; + + if (opts->dp.set_rate) { + switch (opts->dp.link_rate) { + default: + dev_err(&phy->dev, + "Implementation error, unknown linkrate %x\n", + opts->dp.link_rate); + return -EINVAL; + case 1620: + val = BIT_RATE_RBR; + break; + case 2700: + val = BIT_RATE_HBR; + break; + case 5400: + val = BIT_RATE_HBR2; + break; + case 8100: + val = BIT_RATE_HBR3; + break; + } + regmap_write(dp_phy->regs, MTK_DP_PHY_DIG_BIT_RATE, val); + } + + regmap_update_bits(dp_phy->regs, MTK_DP_PHY_DIG_PLL_CTL_1, + TPLL_SSC_EN, opts->dp.ssc ? TPLL_SSC_EN : 0); + + return 0; +} + +static int mtk_dp_phy_reset(struct phy *phy) +{ + struct mtk_dp_phy *dp_phy = phy_get_drvdata(phy); + + regmap_update_bits(dp_phy->regs, MTK_DP_PHY_DIG_SW_RST, + DP_GLB_SW_RST_PHYD, 0); + usleep_range(50, 200); + regmap_update_bits(dp_phy->regs, MTK_DP_PHY_DIG_SW_RST, + DP_GLB_SW_RST_PHYD, 1); + + return 0; +} + +static const struct phy_ops mtk_dp_phy_dev_ops = { + .init = mtk_dp_phy_init, + .configure = mtk_dp_phy_configure, + .reset = mtk_dp_phy_reset, + .owner = THIS_MODULE, +}; + +static int mtk_dp_phy_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct mtk_dp_phy *dp_phy; + struct phy *phy; + struct regmap *regs; + + regs = *(struct regmap **)dev->platform_data; + if (!regs) + return dev_err_probe(dev, EINVAL, "No data passed, requires struct regmap**\n"); + + dp_phy = devm_kzalloc(dev, sizeof(*dp_phy), GFP_KERNEL); + if (!dp_phy) + return -ENOMEM; + + dp_phy->regs = regs; + phy = devm_phy_create(dev, NULL, &mtk_dp_phy_dev_ops); + if (IS_ERR(phy)) + return dev_err_probe(dev, PTR_ERR(phy), "Failed to create DP PHY\n"); + + phy_set_drvdata(phy, dp_phy); + if (!dev->of_node) + phy_create_lookup(phy, "dp", dev_name(dev)); + + return 0; +} + +struct platform_driver mtk_dp_phy_driver = { + .probe = mtk_dp_phy_probe, + .driver = { + .name = "mediatek-dp-phy", + }, +}; +module_platform_driver(mtk_dp_phy_driver); + +MODULE_AUTHOR("Markus Schneider-Pargmann <msp@baylibre.com>"); +MODULE_DESCRIPTION("MediaTek DP PHY Driver"); +MODULE_LICENSE("GPL");