| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Philip Chen | 1444 | 46.72% | 5 | 20.83% |
| Jitao Shi | 804 | 26.01% | 1 | 4.17% |
| Doug Anderson | 283 | 9.16% | 4 | 16.67% |
| Maxime Ripard | 210 | 6.79% | 2 | 8.33% |
| Enric Balletbò i Serra | 201 | 6.50% | 4 | 16.67% |
| Angelo G. Del Regno | 103 | 3.33% | 1 | 4.17% |
| Hsin-Yi, Wang | 29 | 0.94% | 1 | 4.17% |
| Laurent Pinchart | 6 | 0.19% | 1 | 4.17% |
| Ville Syrjälä | 3 | 0.10% | 1 | 4.17% |
| Thomas Zimmermann | 3 | 0.10% | 1 | 4.17% |
| Chen-Yu Tsai | 2 | 0.06% | 1 | 4.17% |
| yangcong | 2 | 0.06% | 1 | 4.17% |
| Chi Minghao | 1 | 0.03% | 1 | 4.17% |
| Total | 3091 | 24 |
// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (c) 2016 MediaTek Inc. */ #include <linux/delay.h> #include <linux/err.h> #include <linux/gpio/consumer.h> #include <linux/i2c.h> #include <linux/module.h> #include <linux/of_graph.h> #include <linux/pm_runtime.h> #include <linux/regmap.h> #include <linux/regulator/consumer.h> #include <drm/display/drm_dp_aux_bus.h> #include <drm/display/drm_dp_helper.h> #include <drm/drm_bridge.h> #include <drm/drm_edid.h> #include <drm/drm_mipi_dsi.h> #include <drm/drm_of.h> #include <drm/drm_panel.h> #include <drm/drm_print.h> #define PAGE0_AUXCH_CFG3 0x76 #define AUXCH_CFG3_RESET 0xff #define PAGE0_SWAUX_ADDR_7_0 0x7d #define PAGE0_SWAUX_ADDR_15_8 0x7e #define PAGE0_SWAUX_ADDR_23_16 0x7f #define SWAUX_ADDR_MASK GENMASK(19, 0) #define PAGE0_SWAUX_LENGTH 0x80 #define SWAUX_LENGTH_MASK GENMASK(3, 0) #define SWAUX_NO_PAYLOAD BIT(7) #define PAGE0_SWAUX_WDATA 0x81 #define PAGE0_SWAUX_RDATA 0x82 #define PAGE0_SWAUX_CTRL 0x83 #define SWAUX_SEND BIT(0) #define PAGE0_SWAUX_STATUS 0x84 #define SWAUX_M_MASK GENMASK(4, 0) #define SWAUX_STATUS_MASK GENMASK(7, 5) #define SWAUX_STATUS_NACK (0x1 << 5) #define SWAUX_STATUS_DEFER (0x2 << 5) #define SWAUX_STATUS_ACKM (0x3 << 5) #define SWAUX_STATUS_INVALID (0x4 << 5) #define SWAUX_STATUS_I2C_NACK (0x5 << 5) #define SWAUX_STATUS_I2C_DEFER (0x6 << 5) #define SWAUX_STATUS_TIMEOUT (0x7 << 5) #define PAGE2_GPIO_H 0xa7 #define PS_GPIO9 BIT(1) #define PAGE2_I2C_BYPASS 0xea #define I2C_BYPASS_EN 0xd0 #define PAGE2_MCS_EN 0xf3 #define MCS_EN BIT(0) #define PAGE3_SET_ADD 0xfe #define VDO_CTL_ADD 0x13 #define VDO_DIS 0x18 #define VDO_EN 0x1c #define NUM_MIPI_LANES 4 #define COMMON_PS8640_REGMAP_CONFIG \ .reg_bits = 8, \ .val_bits = 8, \ .cache_type = REGCACHE_NONE /* * PS8640 uses multiple addresses: * page[0]: for DP control * page[1]: for VIDEO Bridge * page[2]: for control top * page[3]: for DSI Link Control1 * page[4]: for MIPI Phy * page[5]: for VPLL * page[6]: for DSI Link Control2 * page[7]: for SPI ROM mapping */ enum page_addr_offset { PAGE0_DP_CNTL = 0, PAGE1_VDO_BDG, PAGE2_TOP_CNTL, PAGE3_DSI_CNTL1, PAGE4_MIPI_PHY, PAGE5_VPLL, PAGE6_DSI_CNTL2, PAGE7_SPI_CNTL, MAX_DEVS }; enum ps8640_vdo_control { DISABLE = VDO_DIS, ENABLE = VDO_EN, }; struct ps8640 { struct drm_bridge bridge; struct drm_bridge *panel_bridge; struct drm_dp_aux aux; struct mipi_dsi_device *dsi; struct i2c_client *page[MAX_DEVS]; struct regmap *regmap[MAX_DEVS]; struct regulator_bulk_data supplies[2]; struct gpio_desc *gpio_reset; struct gpio_desc *gpio_powerdown; struct device_link *link; bool pre_enabled; bool need_post_hpd_delay; }; static const struct regmap_config ps8640_regmap_config[] = { [PAGE0_DP_CNTL] = { COMMON_PS8640_REGMAP_CONFIG, .max_register = 0xbf, }, [PAGE1_VDO_BDG] = { COMMON_PS8640_REGMAP_CONFIG, .max_register = 0xff, }, [PAGE2_TOP_CNTL] = { COMMON_PS8640_REGMAP_CONFIG, .max_register = 0xff, }, [PAGE3_DSI_CNTL1] = { COMMON_PS8640_REGMAP_CONFIG, .max_register = 0xff, }, [PAGE4_MIPI_PHY] = { COMMON_PS8640_REGMAP_CONFIG, .max_register = 0xff, }, [PAGE5_VPLL] = { COMMON_PS8640_REGMAP_CONFIG, .max_register = 0x7f, }, [PAGE6_DSI_CNTL2] = { COMMON_PS8640_REGMAP_CONFIG, .max_register = 0xff, }, [PAGE7_SPI_CNTL] = { COMMON_PS8640_REGMAP_CONFIG, .max_register = 0xff, }, }; static inline struct ps8640 *bridge_to_ps8640(struct drm_bridge *e) { return container_of(e, struct ps8640, bridge); } static inline struct ps8640 *aux_to_ps8640(struct drm_dp_aux *aux) { return container_of(aux, struct ps8640, aux); } static bool ps8640_of_panel_on_aux_bus(struct device *dev) { struct device_node *bus, *panel; bus = of_get_child_by_name(dev->of_node, "aux-bus"); if (!bus) return false; panel = of_get_child_by_name(bus, "panel"); of_node_put(bus); if (!panel) return false; of_node_put(panel); return true; } static int _ps8640_wait_hpd_asserted(struct ps8640 *ps_bridge, unsigned long wait_us) { struct regmap *map = ps_bridge->regmap[PAGE2_TOP_CNTL]; int status; int ret; /* * Apparently something about the firmware in the chip signals that * HPD goes high by reporting GPIO9 as high (even though HPD isn't * actually connected to GPIO9). */ ret = regmap_read_poll_timeout(map, PAGE2_GPIO_H, status, status & PS_GPIO9, wait_us / 10, wait_us); /* * The first time we see HPD go high after a reset we delay an extra * 50 ms. The best guess is that the MCU is doing "stuff" during this * time (maybe talking to the panel) and we don't want to interrupt it. * * No locking is done around "need_post_hpd_delay". If we're here we * know we're holding a PM Runtime reference and the only other place * that touches this is PM Runtime resume. */ if (!ret && ps_bridge->need_post_hpd_delay) { ps_bridge->need_post_hpd_delay = false; msleep(50); } return ret; } static int ps8640_wait_hpd_asserted(struct drm_dp_aux *aux, unsigned long wait_us) { struct ps8640 *ps_bridge = aux_to_ps8640(aux); struct device *dev = &ps_bridge->page[PAGE0_DP_CNTL]->dev; int ret; /* * Note that this function is called by code that has already powered * the panel. We have to power ourselves up but we don't need to worry * about powering the panel. */ pm_runtime_get_sync(dev); ret = _ps8640_wait_hpd_asserted(ps_bridge, wait_us); pm_runtime_mark_last_busy(dev); pm_runtime_put_autosuspend(dev); return ret; } static ssize_t ps8640_aux_transfer_msg(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg) { struct ps8640 *ps_bridge = aux_to_ps8640(aux); struct regmap *map = ps_bridge->regmap[PAGE0_DP_CNTL]; struct device *dev = &ps_bridge->page[PAGE0_DP_CNTL]->dev; unsigned int len = msg->size; unsigned int data; unsigned int base; int ret; u8 request = msg->request & ~(DP_AUX_I2C_MOT | DP_AUX_I2C_WRITE_STATUS_UPDATE); u8 *buf = msg->buffer; u8 addr_len[PAGE0_SWAUX_LENGTH + 1 - PAGE0_SWAUX_ADDR_7_0]; u8 i; bool is_native_aux = false; if (len > DP_AUX_MAX_PAYLOAD_BYTES) return -EINVAL; if (msg->address & ~SWAUX_ADDR_MASK) return -EINVAL; switch (request) { case DP_AUX_NATIVE_WRITE: case DP_AUX_NATIVE_READ: is_native_aux = true; fallthrough; case DP_AUX_I2C_WRITE: case DP_AUX_I2C_READ: break; default: return -EINVAL; } ret = regmap_write(map, PAGE0_AUXCH_CFG3, AUXCH_CFG3_RESET); if (ret) { DRM_DEV_ERROR(dev, "failed to write PAGE0_AUXCH_CFG3: %d\n", ret); return ret; } /* Assume it's good */ msg->reply = 0; base = PAGE0_SWAUX_ADDR_7_0; addr_len[PAGE0_SWAUX_ADDR_7_0 - base] = msg->address; addr_len[PAGE0_SWAUX_ADDR_15_8 - base] = msg->address >> 8; addr_len[PAGE0_SWAUX_ADDR_23_16 - base] = (msg->address >> 16) | (msg->request << 4); addr_len[PAGE0_SWAUX_LENGTH - base] = (len == 0) ? SWAUX_NO_PAYLOAD : ((len - 1) & SWAUX_LENGTH_MASK); regmap_bulk_write(map, PAGE0_SWAUX_ADDR_7_0, addr_len, ARRAY_SIZE(addr_len)); if (len && (request == DP_AUX_NATIVE_WRITE || request == DP_AUX_I2C_WRITE)) { /* Write to the internal FIFO buffer */ for (i = 0; i < len; i++) { ret = regmap_write(map, PAGE0_SWAUX_WDATA, buf[i]); if (ret) { DRM_DEV_ERROR(dev, "failed to write WDATA: %d\n", ret); return ret; } } } regmap_write(map, PAGE0_SWAUX_CTRL, SWAUX_SEND); /* Zero delay loop because i2c transactions are slow already */ regmap_read_poll_timeout(map, PAGE0_SWAUX_CTRL, data, !(data & SWAUX_SEND), 0, 50 * 1000); regmap_read(map, PAGE0_SWAUX_STATUS, &data); if (ret) { DRM_DEV_ERROR(dev, "failed to read PAGE0_SWAUX_STATUS: %d\n", ret); return ret; } switch (data & SWAUX_STATUS_MASK) { /* Ignore the DEFER cases as they are already handled in hardware */ case SWAUX_STATUS_NACK: case SWAUX_STATUS_I2C_NACK: /* * The programming guide is not clear about whether a I2C NACK * would trigger SWAUX_STATUS_NACK or SWAUX_STATUS_I2C_NACK. So * we handle both cases together. */ if (is_native_aux) msg->reply |= DP_AUX_NATIVE_REPLY_NACK; else msg->reply |= DP_AUX_I2C_REPLY_NACK; fallthrough; case SWAUX_STATUS_ACKM: len = data & SWAUX_M_MASK; break; case SWAUX_STATUS_INVALID: return -EOPNOTSUPP; case SWAUX_STATUS_TIMEOUT: return -ETIMEDOUT; } if (len && (request == DP_AUX_NATIVE_READ || request == DP_AUX_I2C_READ)) { /* Read from the internal FIFO buffer */ for (i = 0; i < len; i++) { ret = regmap_read(map, PAGE0_SWAUX_RDATA, &data); if (ret) { DRM_DEV_ERROR(dev, "failed to read RDATA: %d\n", ret); return ret; } buf[i] = data; } } return len; } static ssize_t ps8640_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg) { struct ps8640 *ps_bridge = aux_to_ps8640(aux); struct device *dev = &ps_bridge->page[PAGE0_DP_CNTL]->dev; int ret; pm_runtime_get_sync(dev); ret = ps8640_aux_transfer_msg(aux, msg); pm_runtime_mark_last_busy(dev); pm_runtime_put_autosuspend(dev); return ret; } static void ps8640_bridge_vdo_control(struct ps8640 *ps_bridge, const enum ps8640_vdo_control ctrl) { struct regmap *map = ps_bridge->regmap[PAGE3_DSI_CNTL1]; struct device *dev = &ps_bridge->page[PAGE3_DSI_CNTL1]->dev; u8 vdo_ctrl_buf[] = { VDO_CTL_ADD, ctrl }; int ret; ret = regmap_bulk_write(map, PAGE3_SET_ADD, vdo_ctrl_buf, sizeof(vdo_ctrl_buf)); if (ret < 0) dev_err(dev, "failed to %sable VDO: %d\n", ctrl == ENABLE ? "en" : "dis", ret); } static int __maybe_unused ps8640_resume(struct device *dev) { struct ps8640 *ps_bridge = dev_get_drvdata(dev); int ret; ret = regulator_bulk_enable(ARRAY_SIZE(ps_bridge->supplies), ps_bridge->supplies); if (ret < 0) { dev_err(dev, "cannot enable regulators %d\n", ret); return ret; } gpiod_set_value(ps_bridge->gpio_powerdown, 0); gpiod_set_value(ps_bridge->gpio_reset, 1); usleep_range(2000, 2500); gpiod_set_value(ps_bridge->gpio_reset, 0); /* Double reset for T4 and T5 */ msleep(50); gpiod_set_value(ps_bridge->gpio_reset, 1); msleep(50); gpiod_set_value(ps_bridge->gpio_reset, 0); /* We just reset things, so we need a delay after the first HPD */ ps_bridge->need_post_hpd_delay = true; /* * Mystery 200 ms delay for the "MCU to be ready". It's unclear if * this is truly necessary since the MCU will already signal that * things are "good to go" by signaling HPD on "gpio 9". See * _ps8640_wait_hpd_asserted(). For now we'll keep this mystery delay * just in case. */ msleep(200); return 0; } static int __maybe_unused ps8640_suspend(struct device *dev) { struct ps8640 *ps_bridge = dev_get_drvdata(dev); int ret; gpiod_set_value(ps_bridge->gpio_reset, 1); gpiod_set_value(ps_bridge->gpio_powerdown, 1); ret = regulator_bulk_disable(ARRAY_SIZE(ps_bridge->supplies), ps_bridge->supplies); if (ret < 0) dev_err(dev, "cannot disable regulators %d\n", ret); return ret; } static const struct dev_pm_ops ps8640_pm_ops = { SET_RUNTIME_PM_OPS(ps8640_suspend, ps8640_resume, NULL) SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume) }; static void ps8640_pre_enable(struct drm_bridge *bridge) { struct ps8640 *ps_bridge = bridge_to_ps8640(bridge); struct regmap *map = ps_bridge->regmap[PAGE2_TOP_CNTL]; struct device *dev = &ps_bridge->page[PAGE0_DP_CNTL]->dev; int ret; pm_runtime_get_sync(dev); ret = _ps8640_wait_hpd_asserted(ps_bridge, 200 * 1000); if (ret < 0) dev_warn(dev, "HPD didn't go high: %d\n", ret); /* * The Manufacturer Command Set (MCS) is a device dependent interface * intended for factory programming of the display module default * parameters. Once the display module is configured, the MCS shall be * disabled by the manufacturer. Once disabled, all MCS commands are * ignored by the display interface. */ ret = regmap_update_bits(map, PAGE2_MCS_EN, MCS_EN, 0); if (ret < 0) dev_warn(dev, "failed write PAGE2_MCS_EN: %d\n", ret); /* Switch access edp panel's edid through i2c */ ret = regmap_write(map, PAGE2_I2C_BYPASS, I2C_BYPASS_EN); if (ret < 0) dev_warn(dev, "failed write PAGE2_MCS_EN: %d\n", ret); ps8640_bridge_vdo_control(ps_bridge, ENABLE); ps_bridge->pre_enabled = true; } static void ps8640_post_disable(struct drm_bridge *bridge) { struct ps8640 *ps_bridge = bridge_to_ps8640(bridge); ps_bridge->pre_enabled = false; ps8640_bridge_vdo_control(ps_bridge, DISABLE); pm_runtime_put_sync_suspend(&ps_bridge->page[PAGE0_DP_CNTL]->dev); } static int ps8640_bridge_attach(struct drm_bridge *bridge, enum drm_bridge_attach_flags flags) { struct ps8640 *ps_bridge = bridge_to_ps8640(bridge); struct device *dev = &ps_bridge->page[0]->dev; int ret; if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) return -EINVAL; ps_bridge->aux.drm_dev = bridge->dev; ret = drm_dp_aux_register(&ps_bridge->aux); if (ret) { dev_err(dev, "failed to register DP AUX channel: %d\n", ret); return ret; } ps_bridge->link = device_link_add(bridge->dev->dev, dev, DL_FLAG_STATELESS); if (!ps_bridge->link) { dev_err(dev, "failed to create device link"); ret = -EINVAL; goto err_devlink; } /* Attach the panel-bridge to the dsi bridge */ ret = drm_bridge_attach(bridge->encoder, ps_bridge->panel_bridge, &ps_bridge->bridge, flags); if (ret) goto err_bridge_attach; return 0; err_bridge_attach: device_link_del(ps_bridge->link); err_devlink: drm_dp_aux_unregister(&ps_bridge->aux); return ret; } static void ps8640_bridge_detach(struct drm_bridge *bridge) { struct ps8640 *ps_bridge = bridge_to_ps8640(bridge); drm_dp_aux_unregister(&ps_bridge->aux); if (ps_bridge->link) device_link_del(ps_bridge->link); } static struct edid *ps8640_bridge_get_edid(struct drm_bridge *bridge, struct drm_connector *connector) { struct ps8640 *ps_bridge = bridge_to_ps8640(bridge); bool poweroff = !ps_bridge->pre_enabled; struct edid *edid; /* * When we end calling get_edid() triggered by an ioctl, i.e * * drm_mode_getconnector (ioctl) * -> drm_helper_probe_single_connector_modes * -> drm_bridge_connector_get_modes * -> ps8640_bridge_get_edid * * We need to make sure that what we need is enabled before reading * EDID, for this chip, we need to do a full poweron, otherwise it will * fail. */ drm_bridge_chain_pre_enable(bridge); edid = drm_get_edid(connector, ps_bridge->page[PAGE0_DP_CNTL]->adapter); /* * If we call the get_edid() function without having enabled the chip * before, return the chip to its original power state. */ if (poweroff) drm_bridge_chain_post_disable(bridge); return edid; } static void ps8640_runtime_disable(void *data) { pm_runtime_dont_use_autosuspend(data); pm_runtime_disable(data); } static const struct drm_bridge_funcs ps8640_bridge_funcs = { .attach = ps8640_bridge_attach, .detach = ps8640_bridge_detach, .get_edid = ps8640_bridge_get_edid, .post_disable = ps8640_post_disable, .pre_enable = ps8640_pre_enable, }; static int ps8640_bridge_get_dsi_resources(struct device *dev, struct ps8640 *ps_bridge) { struct device_node *in_ep, *dsi_node; struct mipi_dsi_device *dsi; struct mipi_dsi_host *host; const struct mipi_dsi_device_info info = { .type = "ps8640", .channel = 0, .node = NULL, }; /* port@0 is ps8640 dsi input port */ in_ep = of_graph_get_endpoint_by_regs(dev->of_node, 0, -1); if (!in_ep) return -ENODEV; dsi_node = of_graph_get_remote_port_parent(in_ep); of_node_put(in_ep); if (!dsi_node) return -ENODEV; host = of_find_mipi_dsi_host_by_node(dsi_node); of_node_put(dsi_node); if (!host) return -EPROBE_DEFER; dsi = devm_mipi_dsi_device_register_full(dev, host, &info); if (IS_ERR(dsi)) { dev_err(dev, "failed to create dsi device\n"); return PTR_ERR(dsi); } ps_bridge->dsi = dsi; dsi->host = host; dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE; dsi->format = MIPI_DSI_FMT_RGB888; dsi->lanes = NUM_MIPI_LANES; return 0; } static int ps8640_bridge_link_panel(struct drm_dp_aux *aux) { struct ps8640 *ps_bridge = aux_to_ps8640(aux); struct device *dev = aux->dev; struct device_node *np = dev->of_node; int ret; /* * NOTE about returning -EPROBE_DEFER from this function: if we * return an error (most relevant to -EPROBE_DEFER) it will only * be passed out to ps8640_probe() if it called this directly (AKA the * panel isn't under the "aux-bus" node). That should be fine because * if the panel is under "aux-bus" it's guaranteed to have probed by * the time this function has been called. */ /* port@1 is ps8640 output port */ ps_bridge->panel_bridge = devm_drm_of_get_bridge(dev, np, 1, 0); if (IS_ERR(ps_bridge->panel_bridge)) return PTR_ERR(ps_bridge->panel_bridge); ret = devm_drm_bridge_add(dev, &ps_bridge->bridge); if (ret) return ret; return devm_mipi_dsi_attach(dev, ps_bridge->dsi); } static int ps8640_probe(struct i2c_client *client) { struct device *dev = &client->dev; struct ps8640 *ps_bridge; int ret; u32 i; ps_bridge = devm_kzalloc(dev, sizeof(*ps_bridge), GFP_KERNEL); if (!ps_bridge) return -ENOMEM; ps_bridge->supplies[0].supply = "vdd12"; ps_bridge->supplies[1].supply = "vdd33"; ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ps_bridge->supplies), ps_bridge->supplies); if (ret) return ret; ps_bridge->gpio_powerdown = devm_gpiod_get(&client->dev, "powerdown", GPIOD_OUT_HIGH); if (IS_ERR(ps_bridge->gpio_powerdown)) return PTR_ERR(ps_bridge->gpio_powerdown); /* * Assert the reset to avoid the bridge being initialized prematurely */ ps_bridge->gpio_reset = devm_gpiod_get(&client->dev, "reset", GPIOD_OUT_HIGH); if (IS_ERR(ps_bridge->gpio_reset)) return PTR_ERR(ps_bridge->gpio_reset); ps_bridge->bridge.funcs = &ps8640_bridge_funcs; ps_bridge->bridge.of_node = dev->of_node; ps_bridge->bridge.type = DRM_MODE_CONNECTOR_eDP; /* * In the device tree, if panel is listed under aux-bus of the bridge * node, panel driver should be able to retrieve EDID by itself using * aux-bus. So let's not set DRM_BRIDGE_OP_EDID here. */ if (!ps8640_of_panel_on_aux_bus(&client->dev)) ps_bridge->bridge.ops = DRM_BRIDGE_OP_EDID; /* * Get MIPI DSI resources early. These can return -EPROBE_DEFER so * we want to get them out of the way sooner. */ ret = ps8640_bridge_get_dsi_resources(&client->dev, ps_bridge); if (ret) return ret; ps_bridge->page[PAGE0_DP_CNTL] = client; ps_bridge->regmap[PAGE0_DP_CNTL] = devm_regmap_init_i2c(client, ps8640_regmap_config); if (IS_ERR(ps_bridge->regmap[PAGE0_DP_CNTL])) return PTR_ERR(ps_bridge->regmap[PAGE0_DP_CNTL]); for (i = 1; i < ARRAY_SIZE(ps_bridge->page); i++) { ps_bridge->page[i] = devm_i2c_new_dummy_device(&client->dev, client->adapter, client->addr + i); if (IS_ERR(ps_bridge->page[i])) return PTR_ERR(ps_bridge->page[i]); ps_bridge->regmap[i] = devm_regmap_init_i2c(ps_bridge->page[i], ps8640_regmap_config + i); if (IS_ERR(ps_bridge->regmap[i])) return PTR_ERR(ps_bridge->regmap[i]); } i2c_set_clientdata(client, ps_bridge); ps_bridge->aux.name = "parade-ps8640-aux"; ps_bridge->aux.dev = dev; ps_bridge->aux.transfer = ps8640_aux_transfer; ps_bridge->aux.wait_hpd_asserted = ps8640_wait_hpd_asserted; drm_dp_aux_init(&ps_bridge->aux); pm_runtime_enable(dev); /* * Powering on ps8640 takes ~300ms. To avoid wasting time on power * cycling ps8640 too often, set autosuspend_delay to 1000ms to ensure * the bridge wouldn't suspend in between each _aux_transfer_msg() call * during EDID read (~20ms in my experiment) and in between the last * _aux_transfer_msg() call during EDID read and the _pre_enable() call * (~100ms in my experiment). */ pm_runtime_set_autosuspend_delay(dev, 1000); pm_runtime_use_autosuspend(dev); pm_suspend_ignore_children(dev, true); ret = devm_add_action_or_reset(dev, ps8640_runtime_disable, dev); if (ret) return ret; ret = devm_of_dp_aux_populate_bus(&ps_bridge->aux, ps8640_bridge_link_panel); /* * If devm_of_dp_aux_populate_bus() returns -ENODEV then it's up to * usa to call ps8640_bridge_link_panel() directly. NOTE: in this case * the function is allowed to -EPROBE_DEFER. */ if (ret == -ENODEV) return ps8640_bridge_link_panel(&ps_bridge->aux); return ret; } static const struct of_device_id ps8640_match[] = { { .compatible = "parade,ps8640" }, { } }; MODULE_DEVICE_TABLE(of, ps8640_match); static struct i2c_driver ps8640_driver = { .probe_new = ps8640_probe, .driver = { .name = "ps8640", .of_match_table = ps8640_match, .pm = &ps8640_pm_ops, }, }; module_i2c_driver(ps8640_driver); MODULE_AUTHOR("Jitao Shi <jitao.shi@mediatek.com>"); MODULE_AUTHOR("CK Hu <ck.hu@mediatek.com>"); MODULE_AUTHOR("Enric Balletbo i Serra <enric.balletbo@collabora.com>"); MODULE_DESCRIPTION("PARADE ps8640 DSI-eDP converter driver"); MODULE_LICENSE("GPL v2");
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