Hi Liu Ying, Thanks for the patch. > -----Original Message----- > From: Liu Ying <victor.liu@xxxxxxx> > Sent: Monday, October 21, 2024 7:45 AM > Subject: [PATCH v3 12/15] drm/bridge: Add ITE IT6263 LVDS to HDMI converter > > Add basic HDMI video output support. Currently, only RGB888 output pixel format is supported. At the > LVDS input side, the driver supports single LVDS link and dual LVDS links with "jeida-24" LVDS > mapping. > > Product link: > https://www.ite.com.tw/en/product/cate1/IT6263 > > Signed-off-by: Liu Ying <victor.liu@xxxxxxx> > --- > v3: > * Use HDMI connector framework. (Maxime) > * Control the missing HDMI_REG_AVI_INFOFRM_CTRL register. > * Validate the maximal HDMI TMDS character rate. (Dmitry) > * Get LVDS data mapping from data-mapping DT property. (Dmitry, Biju) > * Validate 30bit LVDS data bit order by checking data-mirror DT property. > * Use drm_of_lvds_get_dual_link_pixel_order_sink(). (Dmitry) > * Initialize a bridge connector instead of open coding. (Dmitry) > * Add a comment that IT6263 chip has no HPD IRQ support. (Dmitry) > * Use devm_drm_bridge_add() instead of drm_bridge_add(). (Dmitry) > * Fix a minor build warning reported by kernel test robot. > > v2: > * Add AVI inforframe support. (Maxime) > * Add DRM_MODE_CONNECTOR_HDMIA. (Biju) > * Rename it6263_reset() to it6263_hw_reset(). (Biju) > * Check number of LVDS link data lanes. (Biju) > > drivers/gpu/drm/bridge/Kconfig | 11 + > drivers/gpu/drm/bridge/Makefile | 1 + > drivers/gpu/drm/bridge/ite-it6263.c | 906 ++++++++++++++++++++++++++++ > 3 files changed, 918 insertions(+) > create mode 100644 drivers/gpu/drm/bridge/ite-it6263.c > > diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig index > 609f4d0ac93d..6b4664d91faa 100644 > --- a/drivers/gpu/drm/bridge/Kconfig > +++ b/drivers/gpu/drm/bridge/Kconfig > @@ -90,6 +90,17 @@ config DRM_FSL_LDB > help > Support for i.MX8MP DPI-to-LVDS on-SoC encoder. > > +config DRM_ITE_IT6263 > + tristate "ITE IT6263 LVDS/HDMI bridge" > + depends on OF > + select DRM_DISPLAY_HDMI_STATE_HELPER > + select DRM_DISPLAY_HELPER > + select DRM_BRIDGE_CONNECTOR > + select DRM_KMS_HELPER > + select REGMAP_I2C > + help > + ITE IT6263 LVDS to HDMI bridge chip driver. > + > config DRM_ITE_IT6505 > tristate "ITE IT6505 DisplayPort bridge" > depends on OF > diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile index > 3daf803ce80b..97304b429a53 100644 > --- a/drivers/gpu/drm/bridge/Makefile > +++ b/drivers/gpu/drm/bridge/Makefile > @@ -6,6 +6,7 @@ obj-$(CONFIG_DRM_CHRONTEL_CH7033) += chrontel-ch7033.o > obj-$(CONFIG_DRM_CROS_EC_ANX7688) += cros-ec-anx7688.o > obj-$(CONFIG_DRM_DISPLAY_CONNECTOR) += display-connector.o > obj-$(CONFIG_DRM_FSL_LDB) += fsl-ldb.o > +obj-$(CONFIG_DRM_ITE_IT6263) += ite-it6263.o > obj-$(CONFIG_DRM_ITE_IT6505) += ite-it6505.o > obj-$(CONFIG_DRM_LONTIUM_LT8912B) += lontium-lt8912b.o > obj-$(CONFIG_DRM_LONTIUM_LT9211) += lontium-lt9211.o diff --git a/drivers/gpu/drm/bridge/ite-it6263.c > b/drivers/gpu/drm/bridge/ite-it6263.c > new file mode 100644 > index 000000000000..1ad7727742bf > --- /dev/null > +++ b/drivers/gpu/drm/bridge/ite-it6263.c > @@ -0,0 +1,906 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * Copyright 2024 NXP > + */ > + > +#include <linux/bitfield.h> > +#include <linux/bits.h> > +#include <linux/delay.h> > +#include <linux/gpio/consumer.h> > +#include <linux/hdmi.h> > +#include <linux/i2c.h> > +#include <linux/media-bus-format.h> > +#include <linux/module.h> > +#include <linux/of.h> > +#include <linux/regmap.h> > +#include <linux/regulator/consumer.h> > + > +#include <drm/display/drm_hdmi_helper.h> #include > +<drm/display/drm_hdmi_state_helper.h> > +#include <drm/drm_atomic.h> > +#include <drm/drm_atomic_helper.h> > +#include <drm/drm_atomic_state_helper.h> #include <drm/drm_bridge.h> > +#include <drm/drm_bridge_connector.h> #include <drm/drm_connector.h> > +#include <drm/drm_crtc.h> #include <drm/drm_edid.h> #include > +<drm/drm_of.h> #include <drm/drm_probe_helper.h> > + > +/* > +----------------------------------------------------------------------- > +------ > + * LVDS registers > + */ > + > +/* LVDS software reset registers */ > +#define LVDS_REG_05 0x05 > +#define REG_SOFT_P_RST BIT(1) > + > +/* LVDS system configuration registers */ > +/* 0x0b */ > +#define LVDS_REG_0B 0x0b > +#define REG_SSC_PCLK_RF BIT(0) > +#define REG_LVDS_IN_SWAP BIT(1) > + > +/* LVDS test pattern gen control registers */ > +/* 0x2c */ > +#define LVDS_REG_2C 0x2c > +#define REG_COL_DEP GENMASK(1, 0) > +#define BIT8 FIELD_PREP(REG_COL_DEP, 2) > +#define OUT_MAP BIT(4) > +#define JEIDA 0 > +#define REG_DESSC_ENB BIT(6) > +#define DMODE BIT(7) > +#define DISO BIT(7) > +#define SISO 0 > + > +#define LVDS_REG_3C 0x3c > +#define LVDS_REG_3F 0x3f > +#define LVDS_REG_47 0x47 > +#define LVDS_REG_48 0x48 > +#define LVDS_REG_4F 0x4f > +#define LVDS_REG_52 0x52 > + > +/* > +----------------------------------------------------------------------- > +------ > + * HDMI registers are separated into three banks: > + * 1) HDMI register common bank: 0x00 ~ 0x2f */ > + > +/* HDMI genernal registers */ > +#define HDMI_REG_SW_RST 0x04 > +#define SOFTREF_RST BIT(5) > +#define SOFTA_RST BIT(4) > +#define SOFTV_RST BIT(3) > +#define AUD_RST BIT(2) > +#define HDCP_RST BIT(0) > +#define HDMI_RST_ALL (SOFTREF_RST | SOFTA_RST | SOFTV_RST | \ > + AUD_RST | HDCP_RST) > + > +#define HDMI_REG_SYS_STATUS 0x0e > +#define HPDETECT BIT(6) > +#define TXVIDSTABLE BIT(4) > + > +#define HDMI_REG_BANK_CTRL 0x0f > +#define REG_BANK_SEL BIT(0) > + > +/* HDMI System DDC control registers */ > +#define HDMI_REG_DDC_MASTER_CTRL 0x10 > +#define MASTER_SEL_HOST BIT(0) > + > +#define HDMI_REG_DDC_HEADER 0x11 > + > +#define HDMI_REG_DDC_REQOFF 0x12 > +#define HDMI_REG_DDC_REQCOUNT 0x13 > +#define HDMI_REG_DDC_EDIDSEG 0x14 > + > +#define HDMI_REG_DDC_CMD 0x15 > +#define DDC_CMD_EDID_READ 0x3 > +#define DDC_CMD_FIFO_CLR 0x9 > + > +#define HDMI_REG_DDC_STATUS 0x16 > +#define DDC_DONE BIT(7) > +#define DDC_NOACK BIT(5) > +#define DDC_WAITBUS BIT(4) > +#define DDC_ARBILOSE BIT(3) > +#define DDC_ERROR (DDC_NOACK | DDC_WAITBUS | DDC_ARBILOSE) > + > +#define HDMI_DDC_FIFO_BYTES 32 > +#define HDMI_REG_DDC_READFIFO 0x17 > +#define HDMI_REG_LVDS_PORT 0x1d /* LVDS input control I2C addr */ > +#define HDMI_REG_LVDS_PORT_EN 0x1e > +#define LVDS_INPUT_CTRL_I2C_ADDR 0x33 > + > +/* > +----------------------------------------------------------------------- > +------ > + * 2) HDMI register bank0: 0x30 ~ 0xff > + */ > + > +/* HDMI AFE registers */ > +#define HDMI_REG_AFE_DRV_CTRL 0x61 > +#define AFE_DRV_PWD BIT(5) > +#define AFE_DRV_RST BIT(4) > + > +#define HDMI_REG_AFE_XP_CTRL 0x62 > +#define AFE_XP_GAINBIT BIT(7) > +#define AFE_XP_ER0 BIT(4) > +#define AFE_XP_RESETB BIT(3) > + > +#define HDMI_REG_AFE_ISW_CTRL 0x63 > + > +#define HDMI_REG_AFE_IP_CTRL 0x64 > +#define AFE_IP_GAINBIT BIT(7) > +#define AFE_IP_ER0 BIT(3) > +#define AFE_IP_RESETB BIT(2) > + > +/* HDMI input data format registers */ > +#define HDMI_REG_INPUT_MODE 0x70 > +#define IN_RGB 0x00 > + > +/* HDMI general control registers */ > +#define HDMI_REG_HDMI_MODE 0xc0 > +#define TX_HDMI_MODE BIT(0) > + > +#define HDMI_REG_GCP 0xc1 > +#define AVMUTE BIT(0) > +#define HDMI_COLOR_DEPTH GENMASK(6, 4) > +#define HDMI_COLOR_DEPTH_24 FIELD_PREP(HDMI_COLOR_DEPTH, 4) > + > +#define HDMI_REG_PKT_GENERAL_CTRL 0xc6 > +#define HDMI_REG_AVI_INFOFRM_CTRL 0xcd > +#define ENABLE_PKT BIT(0) > +#define REPEAT_PKT BIT(1) > + > +/* > +----------------------------------------------------------------------- > +------ > + * 3) HDMI register bank1: 0x130 ~ 0x1ff (HDMI packet registers) */ > + > +/* AVI packet registers */ > +#define HDMI_REG_AVI_DB1 0x158 > +#define HDMI_REG_AVI_DB2 0x159 > +#define HDMI_REG_AVI_DB3 0x15a > +#define HDMI_REG_AVI_DB4 0x15b > +#define HDMI_REG_AVI_DB5 0x15c > +#define HDMI_REG_AVI_CSUM 0x15d > +#define HDMI_REG_AVI_DB6 0x15e > +#define HDMI_REG_AVI_DB7 0x15f > +#define HDMI_REG_AVI_DB8 0x160 > +#define HDMI_REG_AVI_DB9 0x161 > +#define HDMI_REG_AVI_DB10 0x162 > +#define HDMI_REG_AVI_DB11 0x163 > +#define HDMI_REG_AVI_DB12 0x164 > +#define HDMI_REG_AVI_DB13 0x165 > + > +#define HDMI_AVI_DB_CHUNK1_SIZE (HDMI_REG_AVI_DB5 - HDMI_REG_AVI_DB1 + 1) > +#define HDMI_AVI_DB_CHUNK2_SIZE (HDMI_REG_AVI_DB13 - HDMI_REG_AVI_DB6 + 1) > + > +#define MAX_PIXEL_CLOCK_KHZ 150000 > +#define HIGH_PIXEL_CLOCK_KHZ 80000 > +#define MAX_HDMI_TMDS_CHAR_RATE_HZ 225000000 > + > +struct it6263 { > + struct device *dev; > + struct i2c_client *hdmi_i2c; > + struct i2c_client *lvds_i2c; > + struct regmap *hdmi_regmap; > + struct regmap *lvds_regmap; > + struct drm_bridge bridge; > + struct drm_bridge *next_bridge; > + struct gpio_desc *reset_gpio; This can be dropped, since it is used only in probe(). With that fixed, Reviewed-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx> Cheers, Biju > + int lvds_data_mapping; > + bool lvds_dual_link; > + bool lvds_link12_swap; > +}; > + > +static inline struct it6263 *bridge_to_it6263(struct drm_bridge > +*bridge) { > + return container_of(bridge, struct it6263, bridge); } > + > +static bool it6263_hdmi_writeable_reg(struct device *dev, unsigned int > +reg) { > + switch (reg) { > + case HDMI_REG_SW_RST: > + case HDMI_REG_BANK_CTRL: > + case HDMI_REG_DDC_MASTER_CTRL: > + case HDMI_REG_DDC_HEADER: > + case HDMI_REG_DDC_REQOFF: > + case HDMI_REG_DDC_REQCOUNT: > + case HDMI_REG_DDC_EDIDSEG: > + case HDMI_REG_DDC_CMD: > + case HDMI_REG_LVDS_PORT: > + case HDMI_REG_LVDS_PORT_EN: > + case HDMI_REG_AFE_DRV_CTRL: > + case HDMI_REG_AFE_XP_CTRL: > + case HDMI_REG_AFE_ISW_CTRL: > + case HDMI_REG_AFE_IP_CTRL: > + case HDMI_REG_INPUT_MODE: > + case HDMI_REG_HDMI_MODE: > + case HDMI_REG_GCP: > + case HDMI_REG_PKT_GENERAL_CTRL: > + case HDMI_REG_AVI_INFOFRM_CTRL: > + case HDMI_REG_AVI_DB1: > + case HDMI_REG_AVI_DB2: > + case HDMI_REG_AVI_DB3: > + case HDMI_REG_AVI_DB4: > + case HDMI_REG_AVI_DB5: > + case HDMI_REG_AVI_CSUM: > + case HDMI_REG_AVI_DB6: > + case HDMI_REG_AVI_DB7: > + case HDMI_REG_AVI_DB8: > + case HDMI_REG_AVI_DB9: > + case HDMI_REG_AVI_DB10: > + case HDMI_REG_AVI_DB11: > + case HDMI_REG_AVI_DB12: > + case HDMI_REG_AVI_DB13: > + return true; > + default: > + return false; > + } > +} > + > +static bool it6263_hdmi_readable_reg(struct device *dev, unsigned int > +reg) { > + if (it6263_hdmi_writeable_reg(dev, reg)) > + return true; > + > + switch (reg) { > + case HDMI_REG_SYS_STATUS: > + case HDMI_REG_DDC_STATUS: > + case HDMI_REG_DDC_READFIFO: > + return true; > + default: > + return false; > + } > +} > + > +static bool it6263_hdmi_volatile_reg(struct device *dev, unsigned int > +reg) { > + switch (reg) { > + case HDMI_REG_SW_RST: > + case HDMI_REG_SYS_STATUS: > + case HDMI_REG_DDC_STATUS: > + case HDMI_REG_DDC_READFIFO: > + return true; > + default: > + return false; > + } > +} > + > +static const struct regmap_range_cfg it6263_hdmi_range_cfg = { > + .range_min = 0x00, > + .range_max = HDMI_REG_AVI_DB13, > + .selector_reg = HDMI_REG_BANK_CTRL, > + .selector_mask = REG_BANK_SEL, > + .selector_shift = 0, > + .window_start = 0x00, > + .window_len = 0x100, > +}; > + > +static const struct regmap_config it6263_hdmi_regmap_config = { > + .name = "it6263-hdmi", > + .reg_bits = 8, > + .val_bits = 8, > + .writeable_reg = it6263_hdmi_writeable_reg, > + .readable_reg = it6263_hdmi_readable_reg, > + .volatile_reg = it6263_hdmi_volatile_reg, > + .max_register = HDMI_REG_AVI_DB13, > + .ranges = &it6263_hdmi_range_cfg, > + .num_ranges = 1, > + .cache_type = REGCACHE_MAPLE, > +}; > + > +static bool it6263_lvds_writeable_reg(struct device *dev, unsigned int > +reg) { > + switch (reg) { > + case LVDS_REG_05: > + case LVDS_REG_0B: > + case LVDS_REG_2C: > + case LVDS_REG_3C: > + case LVDS_REG_3F: > + case LVDS_REG_47: > + case LVDS_REG_48: > + case LVDS_REG_4F: > + case LVDS_REG_52: > + return true; > + default: > + return false; > + } > +} > + > +static bool it6263_lvds_readable_reg(struct device *dev, unsigned int > +reg) { > + return it6263_lvds_writeable_reg(dev, reg); } > + > +static bool it6263_lvds_volatile_reg(struct device *dev, unsigned int > +reg) { > + return reg == LVDS_REG_05; > +} > + > +static const struct regmap_config it6263_lvds_regmap_config = { > + .name = "it6263-lvds", > + .reg_bits = 8, > + .val_bits = 8, > + .writeable_reg = it6263_lvds_writeable_reg, > + .readable_reg = it6263_lvds_readable_reg, > + .volatile_reg = it6263_lvds_volatile_reg, > + .max_register = LVDS_REG_52, > + .cache_type = REGCACHE_MAPLE, > +}; > + > +static const char * const it6263_supplies[] = { > + "ivdd", "ovdd", "txavcc18", "txavcc33", "pvcc1", "pvcc2", > + "avcc", "anvdd", "apvdd" > +}; > + > +static int it6263_parse_dt(struct it6263 *it) { > + struct device *dev = it->dev; > + struct device_node *port0, *port1; > + int ret = 0; > + > + it->lvds_data_mapping = drm_of_lvds_get_data_mapping(dev->of_node); > + if (it->lvds_data_mapping < 0) { > + dev_err(dev, "%pOF: invalid or missing %s DT property: %d\n", > + dev->of_node, "data-mapping", it->lvds_data_mapping); > + return it->lvds_data_mapping; > + } > + > + /* LVDS bit order is reversed only for 30-bit data mappings. */ > + if (of_property_read_bool(dev->of_node, "data-mirror") && > + it->lvds_data_mapping != MEDIA_BUS_FMT_RGB101010_1X7X5_SPWG && > + it->lvds_data_mapping != MEDIA_BUS_FMT_RGB101010_1X7X5_JEIDA) { > + dev_err(dev, "%pOF: invalid data-mirror DT property\n", > + dev->of_node); > + return -EINVAL; > + } > + > + it->next_bridge = devm_drm_of_get_bridge(dev, dev->of_node, 2, 0); > + if (IS_ERR(it->next_bridge)) > + return dev_err_probe(dev, PTR_ERR(it->next_bridge), > + "failed to get next bridge\n"); > + > + port0 = of_graph_get_port_by_id(dev->of_node, 0); > + port1 = of_graph_get_port_by_id(dev->of_node, 1); > + if (port0 && port1) { > + int order; > + > + it->lvds_dual_link = true; > + order = drm_of_lvds_get_dual_link_pixel_order_sink(port0, port1); > + if (order < 0) { > + dev_err(dev, > + "failed to get dual link pixel order: %d\n", > + order); > + ret = order; > + } else if (order == DRM_LVDS_DUAL_LINK_EVEN_ODD_PIXELS) { > + it->lvds_link12_swap = true; > + } > + } else if (port1) { > + ret = -EINVAL; > + dev_err(dev, "single input LVDS port1 is not supported\n"); > + } else if (!port0) { > + ret = -EINVAL; > + dev_err(dev, "no input LVDS port\n"); > + } > + > + of_node_put(port0); > + of_node_put(port1); > + > + return ret; > +} > + > +static inline void it6263_hw_reset(struct it6263 *it) { > + if (!it->reset_gpio) > + return; > + > + gpiod_set_value_cansleep(it->reset_gpio, 0); > + fsleep(1000); > + gpiod_set_value_cansleep(it->reset_gpio, 1); > + /* The chip maker says the low pulse should be at least 40ms. */ > + fsleep(40000); > + gpiod_set_value_cansleep(it->reset_gpio, 0); > + /* addtional time to wait the high voltage to be stable */ > + fsleep(5000); > +} > + > +static inline int it6263_lvds_set_i2c_addr(struct it6263 *it) { > + int ret; > + > + ret = regmap_write(it->hdmi_regmap, HDMI_REG_LVDS_PORT, > + LVDS_INPUT_CTRL_I2C_ADDR << 1); > + if (ret) > + return ret; > + > + return regmap_write(it->hdmi_regmap, HDMI_REG_LVDS_PORT_EN, BIT(0)); } > + > +static inline void it6263_lvds_reset(struct it6263 *it) { > + /* AFE PLL reset */ > + regmap_write_bits(it->lvds_regmap, LVDS_REG_3C, BIT(0), 0x0); > + fsleep(1000); > + regmap_write_bits(it->lvds_regmap, LVDS_REG_3C, BIT(0), BIT(0)); > + > + /* software pixel clock domain reset */ > + regmap_write_bits(it->lvds_regmap, LVDS_REG_05, REG_SOFT_P_RST, > + REG_SOFT_P_RST); > + fsleep(1000); > + regmap_write_bits(it->lvds_regmap, LVDS_REG_05, REG_SOFT_P_RST, 0x0); > + fsleep(10000); > +} > + > +static inline void it6263_lvds_set_interface(struct it6263 *it) { > + /* color depth */ > + regmap_write_bits(it->lvds_regmap, LVDS_REG_2C, REG_COL_DEP, BIT8); > + /* output mapping */ > + regmap_write_bits(it->lvds_regmap, LVDS_REG_2C, OUT_MAP, JEIDA); > + > + if (it->lvds_dual_link) { > + regmap_write_bits(it->lvds_regmap, LVDS_REG_2C, DMODE, DISO); > + regmap_write_bits(it->lvds_regmap, LVDS_REG_52, BIT(1), BIT(1)); > + } else { > + regmap_write_bits(it->lvds_regmap, LVDS_REG_2C, DMODE, SISO); > + regmap_write_bits(it->lvds_regmap, LVDS_REG_52, BIT(1), 0); > + } > +} > + > +static inline void it6263_lvds_set_afe(struct it6263 *it) { > + regmap_write(it->lvds_regmap, LVDS_REG_3C, 0xaa); > + regmap_write(it->lvds_regmap, LVDS_REG_3F, 0x02); > + regmap_write(it->lvds_regmap, LVDS_REG_47, 0xaa); > + regmap_write(it->lvds_regmap, LVDS_REG_48, 0x02); > + regmap_write(it->lvds_regmap, LVDS_REG_4F, 0x11); > + > + regmap_write_bits(it->lvds_regmap, LVDS_REG_0B, REG_SSC_PCLK_RF, > + REG_SSC_PCLK_RF); > + regmap_write_bits(it->lvds_regmap, LVDS_REG_3C, 0x07, 0); > + regmap_write_bits(it->lvds_regmap, LVDS_REG_2C, REG_DESSC_ENB, > + REG_DESSC_ENB); > +} > + > +static inline void it6263_lvds_sys_cfg(struct it6263 *it) { > + regmap_write_bits(it->lvds_regmap, LVDS_REG_0B, REG_LVDS_IN_SWAP, > + it->lvds_link12_swap ? REG_LVDS_IN_SWAP : 0); } > + > +static inline void it6263_lvds_config(struct it6263 *it) { > + it6263_lvds_reset(it); > + it6263_lvds_set_interface(it); > + it6263_lvds_set_afe(it); > + it6263_lvds_sys_cfg(it); > +} > + > +static inline void it6263_hdmi_config(struct it6263 *it) { > + regmap_write(it->hdmi_regmap, HDMI_REG_SW_RST, HDMI_RST_ALL); > + regmap_write(it->hdmi_regmap, HDMI_REG_INPUT_MODE, IN_RGB); > + regmap_write_bits(it->hdmi_regmap, HDMI_REG_GCP, HDMI_COLOR_DEPTH, > + HDMI_COLOR_DEPTH_24); > +} > + > +static enum drm_connector_status it6263_detect(struct it6263 *it) { > + unsigned int val; > + > + regmap_read(it->hdmi_regmap, HDMI_REG_SYS_STATUS, &val); > + if (val & HPDETECT) > + return connector_status_connected; > + else > + return connector_status_disconnected; } > + > +static int it6263_read_edid(void *data, u8 *buf, unsigned int block, > +size_t len) { > + struct it6263 *it = data; > + struct regmap *regmap = it->hdmi_regmap; > + unsigned int start = (block % 2) * EDID_LENGTH; > + unsigned int segment = block >> 1; > + unsigned int count, val; > + int ret; > + > + regmap_write(regmap, HDMI_REG_DDC_MASTER_CTRL, MASTER_SEL_HOST); > + regmap_write(regmap, HDMI_REG_DDC_HEADER, DDC_ADDR << 1); > + regmap_write(regmap, HDMI_REG_DDC_EDIDSEG, segment); > + > + while (len) { > + /* clear DDC FIFO */ > + regmap_write(regmap, HDMI_REG_DDC_CMD, DDC_CMD_FIFO_CLR); > + > + ret = regmap_read_poll_timeout(regmap, HDMI_REG_DDC_STATUS, > + val, val & DDC_DONE, > + 2000, 10000); > + if (ret) { > + dev_err(it->dev, "failed to clear DDC FIFO:%d\n", ret); > + return ret; > + } > + > + count = len > HDMI_DDC_FIFO_BYTES ? HDMI_DDC_FIFO_BYTES : len; > + > + /* fire the read command */ > + regmap_write(regmap, HDMI_REG_DDC_REQOFF, start); > + regmap_write(regmap, HDMI_REG_DDC_REQCOUNT, count); > + regmap_write(regmap, HDMI_REG_DDC_CMD, DDC_CMD_EDID_READ); > + > + start += count; > + len -= count; > + > + ret = regmap_read_poll_timeout(regmap, HDMI_REG_DDC_STATUS, val, > + val & (DDC_DONE | DDC_ERROR), > + 20000, 250000); > + if (ret && !(val & DDC_ERROR)) { > + dev_err(it->dev, "failed to read EDID:%d\n", ret); > + return ret; > + } > + > + if (val & DDC_ERROR) { > + dev_err(it->dev, "DDC error\n"); > + return -EIO; > + } > + > + /* cache to buffer */ > + for (; count > 0; count--) { > + regmap_read(regmap, HDMI_REG_DDC_READFIFO, &val); > + *(buf++) = val; > + } > + } > + > + return 0; > +} > + > +static int it6263_bridge_atomic_check(struct drm_bridge *bridge, > + struct drm_bridge_state *bridge_state, > + struct drm_crtc_state *crtc_state, > + struct drm_connector_state *conn_state) { > + struct drm_display_mode *mode = &crtc_state->adjusted_mode; > + int ret; > + > + ret = drm_atomic_helper_connector_hdmi_check(conn_state->connector, > + conn_state->state); > + if (ret) > + return ret; > + > + return mode->clock > MAX_PIXEL_CLOCK_KHZ ? -EINVAL : 0; } > + > +static void > +it6263_bridge_atomic_disable(struct drm_bridge *bridge, > + struct drm_bridge_state *old_bridge_state) { > + struct it6263 *it = bridge_to_it6263(bridge); > + > + regmap_write_bits(it->hdmi_regmap, HDMI_REG_GCP, AVMUTE, AVMUTE); > + regmap_write(it->hdmi_regmap, HDMI_REG_PKT_GENERAL_CTRL, 0); > + regmap_write(it->hdmi_regmap, HDMI_REG_AFE_DRV_CTRL, > + AFE_DRV_RST | AFE_DRV_PWD); > +} > + > +static void > +it6263_bridge_atomic_enable(struct drm_bridge *bridge, > + struct drm_bridge_state *old_bridge_state) { > + struct drm_atomic_state *state = old_bridge_state->base.state; > + struct it6263 *it = bridge_to_it6263(bridge); > + const struct drm_crtc_state *crtc_state; > + struct regmap *regmap = it->hdmi_regmap; > + const struct drm_display_mode *mode; > + struct drm_connector *connector; > + bool is_stable = false; > + struct drm_crtc *crtc; > + unsigned int val; > + bool pclk_high; > + int i, ret; > + > + connector = drm_atomic_get_new_connector_for_encoder(state, > + bridge->encoder); > + crtc = drm_atomic_get_new_connector_state(state, connector)->crtc; > + crtc_state = drm_atomic_get_new_crtc_state(state, crtc); > + mode = &crtc_state->adjusted_mode; > + > + regmap_write(regmap, HDMI_REG_HDMI_MODE, TX_HDMI_MODE); > + > + drm_atomic_helper_connector_hdmi_update_infoframes(connector, state); > + > + /* HDMI AFE setup */ > + pclk_high = mode->clock > HIGH_PIXEL_CLOCK_KHZ; > + regmap_write(regmap, HDMI_REG_AFE_DRV_CTRL, AFE_DRV_RST); > + if (pclk_high) > + regmap_write(regmap, HDMI_REG_AFE_XP_CTRL, > + AFE_XP_GAINBIT | AFE_XP_RESETB); > + else > + regmap_write(regmap, HDMI_REG_AFE_XP_CTRL, > + AFE_XP_ER0 | AFE_XP_RESETB); > + regmap_write(regmap, HDMI_REG_AFE_ISW_CTRL, 0x10); > + if (pclk_high) > + regmap_write(regmap, HDMI_REG_AFE_IP_CTRL, > + AFE_IP_GAINBIT | AFE_IP_RESETB); > + else > + regmap_write(regmap, HDMI_REG_AFE_IP_CTRL, > + AFE_IP_ER0 | AFE_IP_RESETB); > + > + /* HDMI software video reset */ > + regmap_write_bits(regmap, HDMI_REG_SW_RST, SOFTV_RST, SOFTV_RST); > + fsleep(1000); > + regmap_write_bits(regmap, HDMI_REG_SW_RST, SOFTV_RST, 0); > + > + /* reconfigure LVDS and retry several times in case video is instable */ > + for (i = 0; i < 3; i++) { > + ret = regmap_read_poll_timeout(regmap, HDMI_REG_SYS_STATUS, val, > + val & TXVIDSTABLE, > + 20000, 500000); > + if (!ret) { > + is_stable = true; > + break; > + } > + > + it6263_lvds_config(it); > + } > + > + if (!is_stable) > + dev_warn(it->dev, "failed to wait for video stable\n"); > + > + /* HDMI AFE reset release and power up */ > + regmap_write(regmap, HDMI_REG_AFE_DRV_CTRL, 0); > + > + regmap_write_bits(regmap, HDMI_REG_GCP, AVMUTE, 0); > + > + regmap_write(regmap, HDMI_REG_PKT_GENERAL_CTRL, ENABLE_PKT | > +REPEAT_PKT); } > + > +static enum drm_mode_status > +it6263_bridge_mode_valid(struct drm_bridge *bridge, > + const struct drm_display_info *info, > + const struct drm_display_mode *mode) { > + unsigned long long rate; > + > + if (mode->clock > MAX_PIXEL_CLOCK_KHZ) > + return MODE_CLOCK_HIGH; > + > + rate = drm_hdmi_compute_mode_clock(mode, 8, HDMI_COLORSPACE_RGB); > + if (rate == 0) > + return MODE_NOCLOCK; > + > + return bridge->funcs->hdmi_tmds_char_rate_valid(bridge, mode, rate); } > + > +static int it6263_bridge_attach(struct drm_bridge *bridge, > + enum drm_bridge_attach_flags flags) { > + struct it6263 *it = bridge_to_it6263(bridge); > + struct drm_connector *connector; > + int ret; > + > + ret = drm_bridge_attach(bridge->encoder, it->next_bridge, bridge, > + flags | DRM_BRIDGE_ATTACH_NO_CONNECTOR); > + if (ret < 0) > + return ret; > + > + if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR) > + return 0; > + > + connector = drm_bridge_connector_init(bridge->dev, bridge->encoder); > + if (IS_ERR(connector)) { > + ret = PTR_ERR(connector); > + dev_err(it->dev, "failed to initialize bridge connector: %d\n", > + ret); > + return ret; > + } > + > + drm_connector_attach_encoder(connector, bridge->encoder); > + > + return 0; > +} > + > +static enum drm_connector_status it6263_bridge_detect(struct drm_bridge > +*bridge) { > + struct it6263 *it = bridge_to_it6263(bridge); > + > + return it6263_detect(it); > +} > + > +static const struct drm_edid * > +it6263_bridge_edid_read(struct drm_bridge *bridge, > + struct drm_connector *connector) > +{ > + struct it6263 *it = bridge_to_it6263(bridge); > + > + return drm_edid_read_custom(connector, it6263_read_edid, it); } > + > +static u32 * > +it6263_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge, > + struct drm_bridge_state *bridge_state, > + struct drm_crtc_state *crtc_state, > + struct drm_connector_state *conn_state, > + u32 output_fmt, > + unsigned int *num_input_fmts) > +{ > + struct it6263 *it = bridge_to_it6263(bridge); > + u32 *input_fmts; > + > + *num_input_fmts = 0; > + > + if (it->lvds_data_mapping != MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA) > + return NULL; > + > + input_fmts = kmalloc(sizeof(*input_fmts), GFP_KERNEL); > + if (!input_fmts) > + return NULL; > + > + input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA; > + *num_input_fmts = 1; > + > + return input_fmts; > +} > + > +static enum drm_mode_status > +it6263_hdmi_tmds_char_rate_valid(const struct drm_bridge *bridge, > + const struct drm_display_mode *mode, > + unsigned long long tmds_rate) > +{ > + if (tmds_rate > MAX_HDMI_TMDS_CHAR_RATE_HZ) > + return MODE_CLOCK_HIGH; > + > + return MODE_OK; > +} > + > +static int it6263_hdmi_clear_infoframe(struct drm_bridge *bridge, > + enum hdmi_infoframe_type type) { > + struct it6263 *it = bridge_to_it6263(bridge); > + > + if (type == HDMI_INFOFRAME_TYPE_AVI) > + regmap_write(it->hdmi_regmap, HDMI_REG_AVI_INFOFRM_CTRL, 0); > + else > + dev_dbg(it->dev, "unsupported HDMI infoframe 0x%x\n", type); > + > + return 0; > +} > + > +static int it6263_hdmi_write_infoframe(struct drm_bridge *bridge, > + enum hdmi_infoframe_type type, > + const u8 *buffer, size_t len) { > + struct it6263 *it = bridge_to_it6263(bridge); > + struct regmap *regmap = it->hdmi_regmap; > + > + if (type != HDMI_INFOFRAME_TYPE_AVI) { > + dev_dbg(it->dev, "unsupported HDMI infoframe 0x%x\n", type); > + return 0; > + } > + > + /* write the first AVI infoframe data byte chunk(DB1-DB5) */ > + regmap_bulk_write(regmap, HDMI_REG_AVI_DB1, > + &buffer[HDMI_INFOFRAME_HEADER_SIZE], > + HDMI_AVI_DB_CHUNK1_SIZE); > + > + /* write the second AVI infoframe data byte chunk(DB6-DB13) */ > + regmap_bulk_write(regmap, HDMI_REG_AVI_DB6, > + &buffer[HDMI_INFOFRAME_HEADER_SIZE + > + HDMI_AVI_DB_CHUNK1_SIZE], > + HDMI_AVI_DB_CHUNK2_SIZE); > + > + /* write checksum */ > + regmap_write(regmap, HDMI_REG_AVI_CSUM, buffer[3]); > + > + regmap_write(regmap, HDMI_REG_AVI_INFOFRM_CTRL, ENABLE_PKT | > +REPEAT_PKT); > + > + return 0; > +} > + > +static const struct drm_bridge_funcs it6263_bridge_funcs = { > + .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, > + .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, > + .atomic_reset = drm_atomic_helper_bridge_reset, > + .attach = it6263_bridge_attach, > + .mode_valid = it6263_bridge_mode_valid, > + .atomic_disable = it6263_bridge_atomic_disable, > + .atomic_enable = it6263_bridge_atomic_enable, > + .atomic_check = it6263_bridge_atomic_check, > + .detect = it6263_bridge_detect, > + .edid_read = it6263_bridge_edid_read, > + .atomic_get_input_bus_fmts = it6263_bridge_atomic_get_input_bus_fmts, > + .hdmi_tmds_char_rate_valid = it6263_hdmi_tmds_char_rate_valid, > + .hdmi_clear_infoframe = it6263_hdmi_clear_infoframe, > + .hdmi_write_infoframe = it6263_hdmi_write_infoframe, }; > + > +static int it6263_probe(struct i2c_client *client) { > + struct device *dev = &client->dev; > + struct it6263 *it; > + int ret; > + > + it = devm_kzalloc(dev, sizeof(*it), GFP_KERNEL); > + if (!it) > + return -ENOMEM; > + > + it->dev = dev; > + it->hdmi_i2c = client; > + > + it->hdmi_regmap = devm_regmap_init_i2c(client, > + &it6263_hdmi_regmap_config); > + if (IS_ERR(it->hdmi_regmap)) > + return dev_err_probe(dev, PTR_ERR(it->hdmi_regmap), > + "failed to init I2C regmap for HDMI\n"); > + > + it->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW); > + if (IS_ERR(it->reset_gpio)) > + return dev_err_probe(dev, PTR_ERR(it->reset_gpio), > + "failed to get reset gpio\n"); > + > + ret = devm_regulator_bulk_get_enable(dev, ARRAY_SIZE(it6263_supplies), > + it6263_supplies); > + if (ret) > + return dev_err_probe(dev, ret, "failed to get power supplies\n"); > + > + ret = it6263_parse_dt(it); > + if (ret) > + return ret; > + > + it6263_hw_reset(it); > + > + ret = it6263_lvds_set_i2c_addr(it); > + if (ret) > + return dev_err_probe(dev, ret, "failed to set I2C addr\n"); > + > + it->lvds_i2c = devm_i2c_new_dummy_device(dev, client->adapter, > + LVDS_INPUT_CTRL_I2C_ADDR); > + if (IS_ERR(it->lvds_i2c)) > + dev_err_probe(it->dev, PTR_ERR(it->lvds_i2c), > + "failed to allocate I2C device for LVDS\n"); > + > + it->lvds_regmap = devm_regmap_init_i2c(it->lvds_i2c, > + &it6263_lvds_regmap_config); > + if (IS_ERR(it->lvds_regmap)) > + return dev_err_probe(dev, PTR_ERR(it->lvds_regmap), > + "failed to init I2C regmap for LVDS\n"); > + > + it6263_lvds_config(it); > + it6263_hdmi_config(it); > + > + i2c_set_clientdata(client, it); > + > + it->bridge.funcs = &it6263_bridge_funcs; > + it->bridge.of_node = dev->of_node; > + /* IT6263 chip doesn't support HPD interrupt. */ > + it->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID | > + DRM_BRIDGE_OP_HDMI; > + it->bridge.type = DRM_MODE_CONNECTOR_HDMIA; > + it->bridge.vendor = "ITE"; > + it->bridge.product = "IT6263"; > + > + return devm_drm_bridge_add(dev, &it->bridge); } > + > +static const struct of_device_id it6263_of_match[] = { > + { .compatible = "ite,it6263", }, > + { } > +}; > +MODULE_DEVICE_TABLE(of, it6263_of_match); > + > +static const struct i2c_device_id it6263_i2c_ids[] = { > + { "it6263", 0 }, > + { } > +}; > +MODULE_DEVICE_TABLE(i2c, it6263_i2c_ids); > + > +static struct i2c_driver it6263_driver = { > + .probe = it6263_probe, > + .driver = { > + .name = "it6263", > + .of_match_table = it6263_of_match, > + }, > + .id_table = it6263_i2c_ids, > +}; > +module_i2c_driver(it6263_driver); > + > +MODULE_DESCRIPTION("ITE Tech. Inc. IT6263 LVDS/HDMI bridge"); > +MODULE_AUTHOR("Liu Ying <victor.liu@xxxxxxx>"); MODULE_LICENSE("GPL"); > -- > 2.34.1
