The ANX6345 is an ultra-low power DisplayPower/eDP transmitter designed for portable devices. This driver adds initial support for RGB to eDP mode, without HPD and interrupts, but with possibility to inject EDID. This is a configuration usually seen in eDP applications.
Signed-off-by: Icenowy Zheng icenowy@aosc.io --- drivers/gpu/drm/bridge/analogix/Kconfig | 11 + drivers/gpu/drm/bridge/analogix/Makefile | 1 + .../drm/bridge/analogix/analogix-anx6345.c | 862 ++++++++++++++++++ .../drm/bridge/analogix/analogix-i2c-dptx.c | 2 +- .../drm/bridge/analogix/analogix-i2c-dptx.h | 8 + .../bridge/analogix/analogix-i2c-txcommon.h | 3 + 6 files changed, 886 insertions(+), 1 deletion(-) create mode 100644 drivers/gpu/drm/bridge/analogix/analogix-anx6345.c
diff --git a/drivers/gpu/drm/bridge/analogix/Kconfig b/drivers/gpu/drm/bridge/analogix/Kconfig index eb893b465dd8..784ddca83b47 100644 --- a/drivers/gpu/drm/bridge/analogix/Kconfig +++ b/drivers/gpu/drm/bridge/analogix/Kconfig @@ -15,3 +15,14 @@ config DRM_ANALOGIX_ANX78XX designed for portable devices. The ANX78XX transforms the HDMI output of an application processor to MyDP or DisplayPort. + +config DRM_ANALOGIX_ANX6345 + tristate "Analogix ANX6345 bridge" + select DRM_ANALOGIX_DP_I2C + select DRM_KMS_HELPER + select REGMAP_I2C + help + ANX6345 is an ultra-low Full-HD DisplayPort/eDP + transmitter designed for portable devices. The + ANX6345 transforms the LVTTL RGB output of an + application processor to eDP or DisplayPort. diff --git a/drivers/gpu/drm/bridge/analogix/Makefile b/drivers/gpu/drm/bridge/analogix/Makefile index c37e2ded8ce3..3af9feab6e17 100644 --- a/drivers/gpu/drm/bridge/analogix/Makefile +++ b/drivers/gpu/drm/bridge/analogix/Makefile @@ -3,3 +3,4 @@ analogix_dp_i2c-objs := analogix-i2c-dptx.o obj-$(CONFIG_DRM_ANALOGIX_DP) += analogix_dp.o obj-$(CONFIG_DRM_ANALOGIX_DP_I2C) += analogix_dp_i2c.o obj-$(CONFIG_DRM_ANALOGIX_ANX78XX) += analogix-anx78xx.o +obj-$(CONFIG_DRM_ANALOGIX_ANX6345) += analogix-anx6345.o diff --git a/drivers/gpu/drm/bridge/analogix/analogix-anx6345.c b/drivers/gpu/drm/bridge/analogix/analogix-anx6345.c new file mode 100644 index 000000000000..81676407aa6d --- /dev/null +++ b/drivers/gpu/drm/bridge/analogix/analogix-anx6345.c @@ -0,0 +1,862 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright(c) Icenowy Zheng icenowy@aosc.io + * Based on analogix-anx6345.c, which is: + * Copyright(c) 2016, Analogix Semiconductor. + */ +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/interrupt.h> +#include <linux/i2c.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of_gpio.h> +#include <linux/of_platform.h> +#include <linux/regmap.h> +#include <linux/types.h> +#include <linux/gpio/consumer.h> +#include <linux/regulator/consumer.h> + +#include <drm/drmP.h> +#include <drm/drm_atomic_helper.h> +#include <drm/drm_crtc.h> +#include <drm/drm_crtc_helper.h> +#include <drm/drm_dp_helper.h> +#include <drm/drm_edid.h> + +#include "analogix-i2c-dptx.h" +#include "analogix-i2c-txcommon.h" + +#define I2C_NUM_ADDRESSES 2 +#define I2C_IDX_DPTX 0 +#define I2C_IDX_TXCOM 1 + +#define XTAL_CLK 270 /* 27M */ + +#define POLL_DELAY 50000 /* us */ +#define POLL_TIMEOUT 5000000 /* us */ + +static const u8 anx6345_i2c_addresses[] = { + [I2C_IDX_DPTX] = ANALOGIX_I2C_DPTX, + [I2C_IDX_TXCOM] = ANALOGIX_I2C_TXCOMMON, +}; + +struct anx6345_platform_data { + struct regulator *dvdd12; + struct regulator *dvdd25; + struct regulator *vcc_panel; + struct gpio_desc *gpiod_reset; +}; + +struct anx6345 { + struct drm_dp_aux aux; + struct drm_bridge bridge; + struct i2c_client *client; + struct edid *edid; + struct drm_connector connector; + struct drm_dp_link link; + struct anx6345_platform_data pdata; + struct mutex lock; + + /* + * I2C Slave addresses of ANX6345 are mapped as DPTX and SYS + */ + struct i2c_client *i2c_clients[I2C_NUM_ADDRESSES]; + struct regmap *map[I2C_NUM_ADDRESSES]; + + u16 chipid; + u8 dpcd[DP_RECEIVER_CAP_SIZE]; + + bool powered; +}; + +static inline struct anx6345 *connector_to_anx6345(struct drm_connector *c) +{ + return container_of(c, struct anx6345, connector); +} + +static inline struct anx6345 *bridge_to_anx6345(struct drm_bridge *bridge) +{ + return container_of(bridge, struct anx6345, bridge); +} + +static int anx6345_set_bits(struct regmap *map, u8 reg, u8 mask) +{ + return regmap_update_bits(map, reg, mask, mask); +} + +static int anx6345_clear_bits(struct regmap *map, u8 reg, u8 mask) +{ + return regmap_update_bits(map, reg, mask, 0); +} + +static ssize_t anx6345_aux_transfer(struct drm_dp_aux *aux, + struct drm_dp_aux_msg *msg) +{ + struct anx6345 *anx6345 = container_of(aux, struct anx6345, aux); + + return anx_aux_transfer(anx6345->map[I2C_IDX_DPTX], msg); +} + +static int anx6345_dp_link_training(struct anx6345 *anx6345) +{ + unsigned int value; + u8 dp_bw; + int err; + + err = anx6345_clear_bits(anx6345->map[I2C_IDX_TXCOM], + SP_POWERDOWN_CTRL_REG, + SP_TOTAL_PD); + if (err) + return err; + + err = drm_dp_dpcd_readb(&anx6345->aux, DP_MAX_LINK_RATE, &dp_bw); + if (err < 0) + return err; + + switch (dp_bw) { + case DP_LINK_BW_1_62: + case DP_LINK_BW_2_7: + break; + + default: + DRM_DEBUG_KMS("DP bandwidth (%#02x) not supported\n", dp_bw); + return -EINVAL; + } + + err = anx6345_set_bits(anx6345->map[I2C_IDX_TXCOM], SP_VID_CTRL1_REG, + SP_VIDEO_MUTE); + if (err) + return err; + + err = anx6345_clear_bits(anx6345->map[I2C_IDX_TXCOM], + SP_VID_CTRL1_REG, SP_VIDEO_EN); + if (err) + return err; + + /* Get DPCD info */ + err = drm_dp_dpcd_read(&anx6345->aux, DP_DPCD_REV, + &anx6345->dpcd, DP_RECEIVER_CAP_SIZE); + if (err < 0) { + DRM_ERROR("Failed to read DPCD: %d\n", err); + return err; + } + + /* Clear channel x SERDES power down */ + err = anx6345_clear_bits(anx6345->map[I2C_IDX_DPTX], + SP_DP_ANALOG_POWER_DOWN_REG, SP_CH0_PD); + if (err) + return err; + + /* Check link capabilities */ + err = drm_dp_link_probe(&anx6345->aux, &anx6345->link); + if (err < 0) { + DRM_ERROR("Failed to probe link capabilities: %d\n", err); + return err; + } + + /* Power up the sink */ + err = drm_dp_link_power_up(&anx6345->aux, &anx6345->link); + if (err < 0) { + DRM_ERROR("Failed to power up DisplayPort link: %d\n", err); + return err; + } + + /* Possibly enable downspread on the sink */ + err = regmap_write(anx6345->map[I2C_IDX_DPTX], + SP_DP_DOWNSPREAD_CTRL1_REG, 0); + if (err) + return err; + + if (anx6345->dpcd[DP_MAX_DOWNSPREAD] & DP_MAX_DOWNSPREAD_0_5) { + DRM_DEBUG("Enable downspread on the sink\n"); + /* 4000PPM */ + err = regmap_write(anx6345->map[I2C_IDX_DPTX], + SP_DP_DOWNSPREAD_CTRL1_REG, 8); + if (err) + return err; + + err = drm_dp_dpcd_writeb(&anx6345->aux, DP_DOWNSPREAD_CTRL, + DP_SPREAD_AMP_0_5); + if (err < 0) + return err; + } else { + err = drm_dp_dpcd_writeb(&anx6345->aux, DP_DOWNSPREAD_CTRL, 0); + if (err < 0) + return err; + } + + /* Set the lane count and the link rate on the sink */ + if (drm_dp_enhanced_frame_cap(anx6345->dpcd)) + err = anx6345_set_bits(anx6345->map[I2C_IDX_DPTX], + SP_DP_SYSTEM_CTRL_BASE + 4, + SP_ENHANCED_MODE); + else + err = anx6345_clear_bits(anx6345->map[I2C_IDX_DPTX], + SP_DP_SYSTEM_CTRL_BASE + 4, + SP_ENHANCED_MODE); + if (err) + return err; + + value = drm_dp_link_rate_to_bw_code(anx6345->link.rate); + err = regmap_write(anx6345->map[I2C_IDX_DPTX], + SP_DP_MAIN_LINK_BW_SET_REG, value); + if (err) + return err; + + err = regmap_write(anx6345->map[I2C_IDX_DPTX], + SP_DP_LANE_COUNT_SET_REG, anx6345->link.num_lanes); + if (err) + return err; + + err = drm_dp_link_configure(&anx6345->aux, &anx6345->link); + if (err < 0) { + DRM_ERROR("Failed to configure DisplayPort link: %d\n", err); + return err; + } + + /* Start training on the source */ + err = regmap_write(anx6345->map[I2C_IDX_DPTX], SP_DP_LT_CTRL_REG, + SP_LT_EN); + if (err) + return err; + + err = regmap_read_poll_timeout(anx6345->map[I2C_IDX_DPTX], + SP_DP_LT_CTRL_REG, + value, !(value & SP_DP_LT_INPROGRESS), + POLL_DELAY, POLL_TIMEOUT); + if (err) + return err; + + return 0; +} + +static int anx6345_tx_initialization(struct anx6345 *anx6345) +{ + int err, i; + + /* FIXME: hardcode color depth now */ + err = regmap_write(anx6345->map[I2C_IDX_TXCOM], SP_VID_CTRL2_REG, + SP_IN_BPC_6BIT << SP_IN_BPC_SHIFT); + if (err) + return err; + + err = regmap_write(anx6345->map[I2C_IDX_DPTX], SP_DP_PLL_CTRL_REG, 0); + if (err) + return err; + + err = regmap_write(anx6345->map[I2C_IDX_TXCOM], + SP_ANALOG_DEBUG1_REG, 0); + if (err) + return err; + + err = regmap_write(anx6345->map[I2C_IDX_DPTX], + SP_DP_LINK_DEBUG_CTRL_REG, + SP_NEW_PRBS7 | SP_M_VID_DEBUG); + if (err) + return err; + + err = regmap_write(anx6345->map[I2C_IDX_DPTX], + SP_DP_ANALOG_POWER_DOWN_REG, 0); + if (err) + return err; + + /* Force HPD */ + err = anx6345_set_bits(anx6345->map[I2C_IDX_DPTX], + SP_DP_SYSTEM_CTRL_BASE + 3, + SP_HPD_FORCE | SP_HPD_CTRL); + if (err) + return err; + + for (i = 0; i < 4; i++) { + /* 4 lanes */ + err = regmap_write(anx6345->map[I2C_IDX_DPTX], + SP_DP_LANE0_LT_CTRL_REG + i, 0); + if (err) + return err; + } + + /* Reset AUX */ + err = anx6345_set_bits(anx6345->map[I2C_IDX_TXCOM], + SP_RESET_CTRL2_REG, SP_AUX_RST); + if (err) + return err; + + err = anx6345_clear_bits(anx6345->map[I2C_IDX_TXCOM], + SP_RESET_CTRL2_REG, SP_AUX_RST); + if (err) + return err; + + err = anx6345_dp_link_training(anx6345); + if (err) + return err; + + return 0; +} + +static void anx6345_poweron(struct anx6345 *anx6345) +{ + struct anx6345_platform_data *pdata = &anx6345->pdata; + int err; + + if (WARN_ON(anx6345->powered)) + return; + + if (pdata->dvdd12) { + err = regulator_enable(pdata->dvdd12); + if (err) { + DRM_ERROR("Failed to enable DVDD12 regulator: %d\n", + err); + return; + } + + usleep_range(1000, 2000); + } + + if (pdata->dvdd25) { + err = regulator_enable(pdata->dvdd25); + if (err) { + DRM_ERROR("Failed to enable DVDD25 regulator: %d\n", + err); + return; + } + + usleep_range(5000, 10000); + } + + if (pdata->vcc_panel) { + err = regulator_enable(pdata->vcc_panel); + if (err) { + DRM_ERROR("Failed to enable panel regulator: %d\n", + err); + return; + } + } + + gpiod_set_value_cansleep(pdata->gpiod_reset, 0); + usleep_range(1000, 2000); + + gpiod_set_value_cansleep(pdata->gpiod_reset, 1); + + /* Power on registers module */ + anx6345_set_bits(anx6345->map[I2C_IDX_TXCOM], SP_POWERDOWN_CTRL_REG, + SP_HDCP_PD | SP_AUDIO_PD | SP_VIDEO_PD | SP_LINK_PD); + anx6345_clear_bits(anx6345->map[I2C_IDX_TXCOM], SP_POWERDOWN_CTRL_REG, + SP_REGISTER_PD | SP_TOTAL_PD); + + anx6345->powered = true; +} + +static void anx6345_poweroff(struct anx6345 *anx6345) +{ + struct anx6345_platform_data *pdata = &anx6345->pdata; + int err; + + if (WARN_ON(!anx6345->powered)) + return; + + gpiod_set_value_cansleep(pdata->gpiod_reset, 1); + usleep_range(1000, 2000); + + if (pdata->vcc_panel) { + err = regulator_disable(pdata->vcc_panel); + if (err) { + DRM_ERROR("Failed to disable panel regulator: %d\n", + err); + return; + } + } + + if (pdata->dvdd25) { + err = regulator_disable(pdata->dvdd25); + if (err) { + DRM_ERROR("Failed to disable DVDD25 regulator: %d\n", + err); + return; + } + + usleep_range(5000, 10000); + } + + if (pdata->dvdd12) { + err = regulator_disable(pdata->dvdd12); + if (err) { + DRM_ERROR("Failed to disable DVDD12 regulator: %d\n", + err); + return; + } + + usleep_range(1000, 2000); + } + + anx6345->powered = false; +} + +static int anx6345_start(struct anx6345 *anx6345) +{ + int err; + + if (!anx6345->powered) + anx6345_poweron(anx6345); + + /* Power on needed modules */ + err = anx6345_clear_bits(anx6345->map[I2C_IDX_TXCOM], + SP_POWERDOWN_CTRL_REG, + SP_VIDEO_PD | SP_LINK_PD); + + err = anx6345_tx_initialization(anx6345); + if (err) { + DRM_ERROR("Failed transmitter initialization: %d\n", err); + goto err_poweroff; + } + + /* + * This delay seems to help keep the hardware in a good state. Without + * it, there are times where it fails silently. + */ + usleep_range(10000, 15000); + + return 0; + +err_poweroff: + DRM_ERROR("Failed DisplayPort transmitter initialization: %d\n", err); + anx6345_poweroff(anx6345); + + return err; +} + +static int anx6345_init_pdata(struct anx6345 *anx6345) +{ + struct anx6345_platform_data *pdata = &anx6345->pdata; + struct device *dev = &anx6345->client->dev; + + /* 1.2V digital core power regulator */ + pdata->dvdd12 = devm_regulator_get(dev, "dvdd12"); + if (IS_ERR(pdata->dvdd12)) { + DRM_ERROR("DVDD12 regulator not found\n"); + return PTR_ERR(pdata->dvdd12); + } + + /* 2.5V digital core power regulator */ + pdata->dvdd25 = devm_regulator_get(dev, "dvdd25"); + if (IS_ERR(pdata->dvdd25)) { + DRM_ERROR("DVDD25 regulator not found\n"); + return PTR_ERR(pdata->dvdd25); + } + + /* panel power regulator */ + pdata->vcc_panel = devm_regulator_get(dev, "panel"); + if (IS_ERR(pdata->vcc_panel)) { + DRM_ERROR("panel regulator not found\n"); + return PTR_ERR(pdata->vcc_panel); + } + + /* GPIO for chip reset */ + pdata->gpiod_reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW); + + return PTR_ERR_OR_ZERO(pdata->gpiod_reset); +} + +static int anx6345_config_dp_output(struct anx6345 *anx6345) +{ + int err; + + err = anx6345_clear_bits(anx6345->map[I2C_IDX_TXCOM], SP_VID_CTRL1_REG, + SP_VIDEO_MUTE); + if (err) + return err; + + /* Enable DP output */ + err = anx6345_set_bits(anx6345->map[I2C_IDX_TXCOM], SP_VID_CTRL1_REG, + SP_VIDEO_EN); + if (err) + return err; + + /* Force stream valid */ + err = anx6345_set_bits(anx6345->map[I2C_IDX_DPTX], + SP_DP_SYSTEM_CTRL_BASE + 3, + SP_STRM_FORCE | SP_STRM_CTRL); + if (err) + return err; + + return 0; +} + +static int anx6345_get_downstream_info(struct anx6345 *anx6345) +{ + u8 value; + int err; + + err = drm_dp_dpcd_readb(&anx6345->aux, DP_SINK_COUNT, &value); + if (err < 0) { + DRM_ERROR("Get sink count failed %d\n", err); + return err; + } + + if (!DP_GET_SINK_COUNT(value)) { + DRM_ERROR("Downstream disconnected\n"); + return -EIO; + } + + return 0; +} + +static int anx6345_probe_edid_from_of(struct anx6345 *anx6345) +{ + const u8 *edidp; + int len; + + if (!anx6345->bridge.of_node) + return -ENODEV; + + edidp = of_get_property(anx6345->bridge.of_node, "edid", &len); + if (!edidp || len != EDID_LENGTH) + return -EINVAL; + + anx6345->edid = devm_kmemdup(&anx6345->client->dev, edidp, + len, GFP_KERNEL); + + if (!anx6345->edid) + return -ENOMEM; + + return 0; +} + +static int anx6345_get_modes(struct drm_connector *connector) +{ + struct anx6345 *anx6345 = connector_to_anx6345(connector); + int err, num_modes = 0; + + if (WARN_ON(!anx6345->powered)) + return 0; + + if (anx6345->edid) + return drm_add_edid_modes(connector, anx6345->edid); + + mutex_lock(&anx6345->lock); + + err = anx6345_get_downstream_info(anx6345); + if (err) { + DRM_ERROR("Failed to get downstream info: %d\n", err); + goto unlock; + } + + anx6345->edid = drm_get_edid(connector, &anx6345->aux.ddc); + if (!anx6345->edid) + DRM_ERROR("Failed to read EDID from panel\n"); + + if (!anx6345->edid) { + err = anx6345_probe_edid_from_of(anx6345); + if (err) { + DRM_ERROR("Failed to probe EDID from device tree\n"); + goto unlock; + } + } + + err = drm_connector_update_edid_property(connector, + anx6345->edid); + if (err) { + DRM_ERROR("Failed to update EDID property: %d\n", err); + goto unlock; + } + + num_modes = drm_add_edid_modes(connector, anx6345->edid); + +unlock: + mutex_unlock(&anx6345->lock); + + return num_modes; +} + +static const struct drm_connector_helper_funcs anx6345_connector_helper_funcs = { + .get_modes = anx6345_get_modes, +}; + +static enum drm_connector_status anx6345_detect(struct drm_connector *connector, + bool force) +{ + return connector_status_connected; +} + +static const struct drm_connector_funcs anx6345_connector_funcs = { + .fill_modes = drm_helper_probe_single_connector_modes, + .detect = anx6345_detect, + .destroy = drm_connector_cleanup, + .reset = drm_atomic_helper_connector_reset, + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, +}; + +static int anx6345_bridge_attach(struct drm_bridge *bridge) +{ + struct anx6345 *anx6345 = bridge_to_anx6345(bridge); + int err; + + if (!bridge->encoder) { + DRM_ERROR("Parent encoder object not found"); + return -ENODEV; + } + + /* Register aux channel */ + anx6345->aux.name = "DP-AUX"; + anx6345->aux.dev = &anx6345->client->dev; + anx6345->aux.transfer = anx6345_aux_transfer; + + err = drm_dp_aux_register(&anx6345->aux); + if (err < 0) { + DRM_ERROR("Failed to register aux channel: %d\n", err); + return err; + } + + err = drm_connector_init(bridge->dev, &anx6345->connector, + &anx6345_connector_funcs, + DRM_MODE_CONNECTOR_eDP); + if (err) { + DRM_ERROR("Failed to initialize connector: %d\n", err); + return err; + } + + drm_connector_helper_add(&anx6345->connector, + &anx6345_connector_helper_funcs); + + err = drm_connector_register(&anx6345->connector); + if (err) { + DRM_ERROR("Failed to register connector: %d\n", err); + return err; + } + + anx6345->connector.polled = DRM_CONNECTOR_POLL_HPD; + + err = drm_connector_attach_encoder(&anx6345->connector, + bridge->encoder); + if (err) { + DRM_ERROR("Failed to link up connector to encoder: %d\n", err); + return err; + } + + return 0; +} + +static bool anx6345_bridge_mode_fixup(struct drm_bridge *bridge, + const struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + if (mode->flags & DRM_MODE_FLAG_INTERLACE) + return false; + + /* Max 1200p at 5.4 Ghz, one lane */ + if (mode->clock > 154000) + return false; + + return true; +} + +static void anx6345_bridge_disable(struct drm_bridge *bridge) +{ + struct anx6345 *anx6345 = bridge_to_anx6345(bridge); + + /* Power off all modules except configuration registers access */ + anx6345_set_bits(anx6345->map[I2C_IDX_TXCOM], SP_POWERDOWN_CTRL_REG, + SP_HDCP_PD | SP_AUDIO_PD | SP_VIDEO_PD | SP_LINK_PD); +} + +static void anx6345_bridge_mode_set(struct drm_bridge *bridge, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + struct anx6345 *anx6345 = bridge_to_anx6345(bridge); + + if (WARN_ON(!anx6345->powered)) + return; +} + +static void anx6345_bridge_enable(struct drm_bridge *bridge) +{ + struct anx6345 *anx6345 = bridge_to_anx6345(bridge); + int err; + + err = anx6345_start(anx6345); + if (err) { + DRM_ERROR("Failed to initialize: %d\n", err); + return; + } + + err = anx6345_config_dp_output(anx6345); + if (err) + DRM_ERROR("Failed to enable DP output: %d\n", err); +} + +static const struct drm_bridge_funcs anx6345_bridge_funcs = { + .attach = anx6345_bridge_attach, + .mode_fixup = anx6345_bridge_mode_fixup, + .disable = anx6345_bridge_disable, + .mode_set = anx6345_bridge_mode_set, + .enable = anx6345_bridge_enable, +}; + +static void unregister_i2c_dummy_clients(struct anx6345 *anx6345) +{ + unsigned int i; + + for (i = 1; i < ARRAY_SIZE(anx6345->i2c_clients); i++) + if (anx6345->i2c_clients[i] && + anx6345->i2c_clients[i]->addr != anx6345->client->addr) + i2c_unregister_device(anx6345->i2c_clients[i]); +} + +static const struct regmap_config anx6345_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = 0xff, +}; + +static const u16 anx6345_chipid_list[] = { + 0x6345, +}; + +static int anx6345_i2c_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct anx6345 *anx6345; + struct anx6345_platform_data *pdata; + unsigned int i, idl, idh, version; + bool found = false; + int err; + + anx6345 = devm_kzalloc(&client->dev, sizeof(*anx6345), GFP_KERNEL); + if (!anx6345) + return -ENOMEM; + + pdata = &anx6345->pdata; + + mutex_init(&anx6345->lock); + +#if IS_ENABLED(CONFIG_OF) + anx6345->bridge.of_node = client->dev.of_node; +#endif + + anx6345->client = client; + i2c_set_clientdata(client, anx6345); + + err = anx6345_init_pdata(anx6345); + if (err) { + DRM_ERROR("Failed to initialize pdata: %d\n", err); + return err; + } + + /* Map slave addresses of ANX6345 */ + for (i = 0; i < I2C_NUM_ADDRESSES; i++) { + if (anx6345_i2c_addresses[i] >> 1 != client->addr) + anx6345->i2c_clients[i] = i2c_new_dummy(client->adapter, + anx6345_i2c_addresses[i] >> 1); + else + anx6345->i2c_clients[i] = client; + + if (!anx6345->i2c_clients[i]) { + err = -ENOMEM; + DRM_ERROR("Failed to reserve I2C bus %02x\n", + anx6345_i2c_addresses[i]); + goto err_unregister_i2c; + } + + anx6345->map[i] = devm_regmap_init_i2c(anx6345->i2c_clients[i], + &anx6345_regmap_config); + if (IS_ERR(anx6345->map[i])) { + err = PTR_ERR(anx6345->map[i]); + DRM_ERROR("Failed regmap initialization %02x\n", + anx6345_i2c_addresses[i]); + goto err_unregister_i2c; + } + } + + /* Look for supported chip ID */ + anx6345_poweron(anx6345); + + err = regmap_read(anx6345->map[I2C_IDX_TXCOM], SP_DEVICE_IDL_REG, + &idl); + if (err) + goto err_poweroff; + + err = regmap_read(anx6345->map[I2C_IDX_TXCOM], SP_DEVICE_IDH_REG, + &idh); + if (err) + goto err_poweroff; + + anx6345->chipid = (u8)idl | ((u8)idh << 8); + + err = regmap_read(anx6345->map[I2C_IDX_TXCOM], SP_DEVICE_VERSION_REG, + &version); + if (err) + goto err_poweroff; + + for (i = 0; i < ARRAY_SIZE(anx6345_chipid_list); i++) { + if (anx6345->chipid == anx6345_chipid_list[i]) { + DRM_INFO("Found ANX%x (ver. %d) eDP Transmitter\n", + anx6345->chipid, version); + found = true; + break; + } + } + + if (!found) { + DRM_ERROR("ANX%x (ver. %d) not supported by this driver\n", + anx6345->chipid, version); + err = -ENODEV; + goto err_poweroff; + } + + anx6345->bridge.funcs = &anx6345_bridge_funcs; + + drm_bridge_add(&anx6345->bridge); + + return 0; + +err_poweroff: + anx6345_poweroff(anx6345); + +err_unregister_i2c: + unregister_i2c_dummy_clients(anx6345); + return err; +} + +static int anx6345_i2c_remove(struct i2c_client *client) +{ + struct anx6345 *anx6345 = i2c_get_clientdata(client); + + drm_bridge_remove(&anx6345->bridge); + + unregister_i2c_dummy_clients(anx6345); + + kfree(anx6345->edid); + + return 0; +} + +static const struct i2c_device_id anx6345_id[] = { + { "anx6345", 0 }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(i2c, anx6345_id); + +#if IS_ENABLED(CONFIG_OF) +static const struct of_device_id anx6345_match_table[] = { + { .compatible = "analogix,anx6345", }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, anx6345_match_table); +#endif + +static struct i2c_driver anx6345_driver = { + .driver = { + .name = "anx6345", + .of_match_table = of_match_ptr(anx6345_match_table), + }, + .probe = anx6345_i2c_probe, + .remove = anx6345_i2c_remove, + .id_table = anx6345_id, +}; +module_i2c_driver(anx6345_driver); + +MODULE_DESCRIPTION("ANX6345 eDP Transmitter driver"); +MODULE_AUTHOR("Icenowy Zheng icenowy@aosc.io"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/gpu/drm/bridge/analogix/analogix-i2c-dptx.c b/drivers/gpu/drm/bridge/analogix/analogix-i2c-dptx.c index 9cb30962032e..53b0e73d6a24 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix-i2c-dptx.c +++ b/drivers/gpu/drm/bridge/analogix/analogix-i2c-dptx.c @@ -117,7 +117,7 @@ ssize_t anx_aux_transfer(struct regmap *map_dptx, struct drm_dp_aux_msg *msg) else /* For non-zero-sized set the length field. */ ctrl1 |= (msg->size - 1) << SP_AUX_LENGTH_SHIFT;
- if ((msg->request & DP_AUX_I2C_READ) == 0) { + if ((msg->size > 0) && ((msg->request & DP_AUX_I2C_READ) == 0)) { /* When WRITE | MOT write values to data buffer */ err = regmap_bulk_write(map_dptx, SP_DP_BUF_DATA0_REG, buffer, diff --git a/drivers/gpu/drm/bridge/analogix/analogix-i2c-dptx.h b/drivers/gpu/drm/bridge/analogix/analogix-i2c-dptx.h index c2ca854613a0..b29a0b3bc23c 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix-i2c-dptx.h +++ b/drivers/gpu/drm/bridge/analogix/analogix-i2c-dptx.h @@ -75,7 +75,11 @@ #define SP_CHA_STA BIT(2) /* Bits for DP System Control Register 3 */ #define SP_HPD_STATUS BIT(6) +#define SP_HPD_FORCE BIT(5) +#define SP_HPD_CTRL BIT(4) #define SP_STRM_VALID BIT(2) +#define SP_STRM_FORCE BIT(1) +#define SP_STRM_CTRL BIT(0) /* Bits for DP System Control Register 4 */ #define SP_ENHANCED_MODE BIT(3)
@@ -120,6 +124,9 @@ #define SP_LINK_BW_SET_MASK 0x1f #define SP_INITIAL_SLIM_M_AUD_SEL BIT(5)
+/* DP Lane Count Setting Register */ +#define SP_DP_LANE_COUNT_SET_REG 0xa1 + /* DP Training Pattern Set Register */ #define SP_DP_TRAINING_PATTERN_SET_REG 0xa2
@@ -133,6 +140,7 @@
/* DP Link Training Control Register */ #define SP_DP_LT_CTRL_REG 0xa8 +#define SP_DP_LT_INPROGRESS 0x80 #define SP_LT_ERROR_TYPE_MASK 0x70 # define SP_LT_NO_ERROR 0x00 # define SP_LT_AUX_WRITE_ERROR 0x01 diff --git a/drivers/gpu/drm/bridge/analogix/analogix-i2c-txcommon.h b/drivers/gpu/drm/bridge/analogix/analogix-i2c-txcommon.h index 7d683573e970..480c98a225b1 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix-i2c-txcommon.h +++ b/drivers/gpu/drm/bridge/analogix/analogix-i2c-txcommon.h @@ -183,6 +183,9 @@ #define SP_VBIT BIT(1) #define SP_AUDIO_LAYOUT BIT(0)
+/* Analog Debug Register 1 */ +#define SP_ANALOG_DEBUG1_REG 0xdc + /* Analog Debug Register 2 */ #define SP_ANALOG_DEBUG2_REG 0xdd #define SP_FORCE_SW_OFF_BYPASS 0x20