1d2912cb1SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 2dc55ac3bSJyri Sarha /* 3dc55ac3bSJyri Sarha * Copyright (C) 2016 Texas Instruments 4dc55ac3bSJyri Sarha * Author: Jyri Sarha <jsarha@ti.com> 5dc55ac3bSJyri Sarha */ 6dc55ac3bSJyri Sarha 7f56c9202SChristopher Spinrath #include <linux/delay.h> 8f56c9202SChristopher Spinrath #include <linux/fwnode.h> 9f56c9202SChristopher Spinrath #include <linux/gpio/consumer.h> 1095b60804SSam Ravnborg #include <linux/i2c.h> 11f56c9202SChristopher Spinrath #include <linux/irq.h> 12dc55ac3bSJyri Sarha #include <linux/module.h> 13dc55ac3bSJyri Sarha #include <linux/of_graph.h> 14dc55ac3bSJyri Sarha #include <linux/platform_device.h> 15dc55ac3bSJyri Sarha 16dc55ac3bSJyri Sarha #include <drm/drm_atomic_helper.h> 17ee68c743SBoris Brezillon #include <drm/drm_bridge.h> 18dc55ac3bSJyri Sarha #include <drm/drm_crtc.h> 1995b60804SSam Ravnborg #include <drm/drm_print.h> 20fcd70cd3SDaniel Vetter #include <drm/drm_probe_helper.h> 21dc55ac3bSJyri Sarha 22f56c9202SChristopher Spinrath #define HOTPLUG_DEBOUNCE_MS 1100 23f56c9202SChristopher Spinrath 24dc55ac3bSJyri Sarha struct tfp410 { 25dc55ac3bSJyri Sarha struct drm_bridge bridge; 26dc55ac3bSJyri Sarha struct drm_connector connector; 2760b903c3SLaurent Pinchart unsigned int connector_type; 28dc55ac3bSJyri Sarha 290eb2766dSPeter Ujfalusi u32 bus_format; 30dc55ac3bSJyri Sarha struct i2c_adapter *ddc; 31f56c9202SChristopher Spinrath struct gpio_desc *hpd; 323d31e215SPeter Ujfalusi int hpd_irq; 33f56c9202SChristopher Spinrath struct delayed_work hpd_work; 3438c02db7SLaurent Pinchart struct gpio_desc *powerdown; 35dc55ac3bSJyri Sarha 36897dae56SLaurent Pinchart struct drm_bridge_timings timings; 37897dae56SLaurent Pinchart 38dc55ac3bSJyri Sarha struct device *dev; 39dc55ac3bSJyri Sarha }; 40dc55ac3bSJyri Sarha 41dc55ac3bSJyri Sarha static inline struct tfp410 * 42dc55ac3bSJyri Sarha drm_bridge_to_tfp410(struct drm_bridge *bridge) 43dc55ac3bSJyri Sarha { 44dc55ac3bSJyri Sarha return container_of(bridge, struct tfp410, bridge); 45dc55ac3bSJyri Sarha } 46dc55ac3bSJyri Sarha 47dc55ac3bSJyri Sarha static inline struct tfp410 * 48dc55ac3bSJyri Sarha drm_connector_to_tfp410(struct drm_connector *connector) 49dc55ac3bSJyri Sarha { 50dc55ac3bSJyri Sarha return container_of(connector, struct tfp410, connector); 51dc55ac3bSJyri Sarha } 52dc55ac3bSJyri Sarha 53dc55ac3bSJyri Sarha static int tfp410_get_modes(struct drm_connector *connector) 54dc55ac3bSJyri Sarha { 55dc55ac3bSJyri Sarha struct tfp410 *dvi = drm_connector_to_tfp410(connector); 56dc55ac3bSJyri Sarha struct edid *edid; 57dc55ac3bSJyri Sarha int ret; 58dc55ac3bSJyri Sarha 59dc55ac3bSJyri Sarha if (!dvi->ddc) 60dc55ac3bSJyri Sarha goto fallback; 61dc55ac3bSJyri Sarha 62dc55ac3bSJyri Sarha edid = drm_get_edid(connector, dvi->ddc); 63dc55ac3bSJyri Sarha if (!edid) { 64dc55ac3bSJyri Sarha DRM_INFO("EDID read failed. Fallback to standard modes\n"); 65dc55ac3bSJyri Sarha goto fallback; 66dc55ac3bSJyri Sarha } 67dc55ac3bSJyri Sarha 68c555f023SDaniel Vetter drm_connector_update_edid_property(connector, edid); 69dc55ac3bSJyri Sarha 70c08f99c3STomi Valkeinen ret = drm_add_edid_modes(connector, edid); 71c08f99c3STomi Valkeinen 72c08f99c3STomi Valkeinen kfree(edid); 73c08f99c3STomi Valkeinen 74c08f99c3STomi Valkeinen return ret; 75c08f99c3STomi Valkeinen 76dc55ac3bSJyri Sarha fallback: 77dc55ac3bSJyri Sarha /* No EDID, fallback on the XGA standard modes */ 78dc55ac3bSJyri Sarha ret = drm_add_modes_noedid(connector, 1920, 1200); 79dc55ac3bSJyri Sarha 80dc55ac3bSJyri Sarha /* And prefer a mode pretty much anything can handle */ 81dc55ac3bSJyri Sarha drm_set_preferred_mode(connector, 1024, 768); 82dc55ac3bSJyri Sarha 83dc55ac3bSJyri Sarha return ret; 84dc55ac3bSJyri Sarha } 85dc55ac3bSJyri Sarha 86dc55ac3bSJyri Sarha static const struct drm_connector_helper_funcs tfp410_con_helper_funcs = { 87dc55ac3bSJyri Sarha .get_modes = tfp410_get_modes, 88dc55ac3bSJyri Sarha }; 89dc55ac3bSJyri Sarha 90dc55ac3bSJyri Sarha static enum drm_connector_status 91dc55ac3bSJyri Sarha tfp410_connector_detect(struct drm_connector *connector, bool force) 92dc55ac3bSJyri Sarha { 93dc55ac3bSJyri Sarha struct tfp410 *dvi = drm_connector_to_tfp410(connector); 94dc55ac3bSJyri Sarha 95f56c9202SChristopher Spinrath if (dvi->hpd) { 96f56c9202SChristopher Spinrath if (gpiod_get_value_cansleep(dvi->hpd)) 97f56c9202SChristopher Spinrath return connector_status_connected; 98f56c9202SChristopher Spinrath else 99f56c9202SChristopher Spinrath return connector_status_disconnected; 100f56c9202SChristopher Spinrath } 101f56c9202SChristopher Spinrath 102dc55ac3bSJyri Sarha if (dvi->ddc) { 103dc55ac3bSJyri Sarha if (drm_probe_ddc(dvi->ddc)) 104dc55ac3bSJyri Sarha return connector_status_connected; 105dc55ac3bSJyri Sarha else 106dc55ac3bSJyri Sarha return connector_status_disconnected; 107dc55ac3bSJyri Sarha } 108dc55ac3bSJyri Sarha 109dc55ac3bSJyri Sarha return connector_status_unknown; 110dc55ac3bSJyri Sarha } 111dc55ac3bSJyri Sarha 112dc55ac3bSJyri Sarha static const struct drm_connector_funcs tfp410_con_funcs = { 113dc55ac3bSJyri Sarha .detect = tfp410_connector_detect, 114dc55ac3bSJyri Sarha .fill_modes = drm_helper_probe_single_connector_modes, 115dc55ac3bSJyri Sarha .destroy = drm_connector_cleanup, 116dc55ac3bSJyri Sarha .reset = drm_atomic_helper_connector_reset, 117dc55ac3bSJyri Sarha .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 118dc55ac3bSJyri Sarha .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 119dc55ac3bSJyri Sarha }; 120dc55ac3bSJyri Sarha 121a25b988fSLaurent Pinchart static int tfp410_attach(struct drm_bridge *bridge, 122a25b988fSLaurent Pinchart enum drm_bridge_attach_flags flags) 123dc55ac3bSJyri Sarha { 124dc55ac3bSJyri Sarha struct tfp410 *dvi = drm_bridge_to_tfp410(bridge); 125dc55ac3bSJyri Sarha int ret; 126dc55ac3bSJyri Sarha 127a25b988fSLaurent Pinchart if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR) { 128a25b988fSLaurent Pinchart DRM_ERROR("Fix bridge driver to make connector optional!"); 129a25b988fSLaurent Pinchart return -EINVAL; 130a25b988fSLaurent Pinchart } 131a25b988fSLaurent Pinchart 132dc55ac3bSJyri Sarha if (!bridge->encoder) { 133dc55ac3bSJyri Sarha dev_err(dvi->dev, "Missing encoder\n"); 134dc55ac3bSJyri Sarha return -ENODEV; 135dc55ac3bSJyri Sarha } 136dc55ac3bSJyri Sarha 1373d31e215SPeter Ujfalusi if (dvi->hpd_irq >= 0) 138f56c9202SChristopher Spinrath dvi->connector.polled = DRM_CONNECTOR_POLL_HPD; 1393d31e215SPeter Ujfalusi else 1403d31e215SPeter Ujfalusi dvi->connector.polled = DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT; 141f56c9202SChristopher Spinrath 142dc55ac3bSJyri Sarha drm_connector_helper_add(&dvi->connector, 143dc55ac3bSJyri Sarha &tfp410_con_helper_funcs); 144cfb44455SAndrzej Pietrasiewicz ret = drm_connector_init_with_ddc(bridge->dev, &dvi->connector, 145cfb44455SAndrzej Pietrasiewicz &tfp410_con_funcs, 146cfb44455SAndrzej Pietrasiewicz dvi->connector_type, 147cfb44455SAndrzej Pietrasiewicz dvi->ddc); 148dc55ac3bSJyri Sarha if (ret) { 149dc55ac3bSJyri Sarha dev_err(dvi->dev, "drm_connector_init() failed: %d\n", ret); 150dc55ac3bSJyri Sarha return ret; 151dc55ac3bSJyri Sarha } 152dc55ac3bSJyri Sarha 1530eb2766dSPeter Ujfalusi drm_display_info_set_bus_formats(&dvi->connector.display_info, 1540eb2766dSPeter Ujfalusi &dvi->bus_format, 1); 1550eb2766dSPeter Ujfalusi 156cde4c44dSDaniel Vetter drm_connector_attach_encoder(&dvi->connector, 157dc55ac3bSJyri Sarha bridge->encoder); 158dc55ac3bSJyri Sarha 159dc55ac3bSJyri Sarha return 0; 160dc55ac3bSJyri Sarha } 161dc55ac3bSJyri Sarha 16238c02db7SLaurent Pinchart static void tfp410_enable(struct drm_bridge *bridge) 16338c02db7SLaurent Pinchart { 16438c02db7SLaurent Pinchart struct tfp410 *dvi = drm_bridge_to_tfp410(bridge); 16538c02db7SLaurent Pinchart 16638c02db7SLaurent Pinchart gpiod_set_value_cansleep(dvi->powerdown, 0); 16738c02db7SLaurent Pinchart } 16838c02db7SLaurent Pinchart 16938c02db7SLaurent Pinchart static void tfp410_disable(struct drm_bridge *bridge) 17038c02db7SLaurent Pinchart { 17138c02db7SLaurent Pinchart struct tfp410 *dvi = drm_bridge_to_tfp410(bridge); 17238c02db7SLaurent Pinchart 17338c02db7SLaurent Pinchart gpiod_set_value_cansleep(dvi->powerdown, 1); 17438c02db7SLaurent Pinchart } 17538c02db7SLaurent Pinchart 1769109594dSTomi Valkeinen static enum drm_mode_status tfp410_mode_valid(struct drm_bridge *bridge, 1779109594dSTomi Valkeinen const struct drm_display_mode *mode) 1789109594dSTomi Valkeinen { 1799109594dSTomi Valkeinen if (mode->clock < 25000) 1809109594dSTomi Valkeinen return MODE_CLOCK_LOW; 1819109594dSTomi Valkeinen 1829109594dSTomi Valkeinen if (mode->clock > 165000) 1839109594dSTomi Valkeinen return MODE_CLOCK_HIGH; 1849109594dSTomi Valkeinen 1859109594dSTomi Valkeinen return MODE_OK; 1869109594dSTomi Valkeinen } 1879109594dSTomi Valkeinen 188dc55ac3bSJyri Sarha static const struct drm_bridge_funcs tfp410_bridge_funcs = { 189dc55ac3bSJyri Sarha .attach = tfp410_attach, 19038c02db7SLaurent Pinchart .enable = tfp410_enable, 19138c02db7SLaurent Pinchart .disable = tfp410_disable, 1929109594dSTomi Valkeinen .mode_valid = tfp410_mode_valid, 193dc55ac3bSJyri Sarha }; 194dc55ac3bSJyri Sarha 195f56c9202SChristopher Spinrath static void tfp410_hpd_work_func(struct work_struct *work) 196f56c9202SChristopher Spinrath { 197f56c9202SChristopher Spinrath struct tfp410 *dvi; 198f56c9202SChristopher Spinrath 199f56c9202SChristopher Spinrath dvi = container_of(work, struct tfp410, hpd_work.work); 200f56c9202SChristopher Spinrath 201f56c9202SChristopher Spinrath if (dvi->bridge.dev) 202f56c9202SChristopher Spinrath drm_helper_hpd_irq_event(dvi->bridge.dev); 203f56c9202SChristopher Spinrath } 204f56c9202SChristopher Spinrath 205f56c9202SChristopher Spinrath static irqreturn_t tfp410_hpd_irq_thread(int irq, void *arg) 206f56c9202SChristopher Spinrath { 207f56c9202SChristopher Spinrath struct tfp410 *dvi = arg; 208f56c9202SChristopher Spinrath 209f56c9202SChristopher Spinrath mod_delayed_work(system_wq, &dvi->hpd_work, 210f56c9202SChristopher Spinrath msecs_to_jiffies(HOTPLUG_DEBOUNCE_MS)); 211f56c9202SChristopher Spinrath 212f56c9202SChristopher Spinrath return IRQ_HANDLED; 213f56c9202SChristopher Spinrath } 214f56c9202SChristopher Spinrath 215897dae56SLaurent Pinchart static const struct drm_bridge_timings tfp410_default_timings = { 216897dae56SLaurent Pinchart .input_bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE 217897dae56SLaurent Pinchart | DRM_BUS_FLAG_DE_HIGH, 218897dae56SLaurent Pinchart .setup_time_ps = 1200, 219897dae56SLaurent Pinchart .hold_time_ps = 1300, 220897dae56SLaurent Pinchart }; 221897dae56SLaurent Pinchart 222897dae56SLaurent Pinchart static int tfp410_parse_timings(struct tfp410 *dvi, bool i2c) 223897dae56SLaurent Pinchart { 224897dae56SLaurent Pinchart struct drm_bridge_timings *timings = &dvi->timings; 225897dae56SLaurent Pinchart struct device_node *ep; 226897dae56SLaurent Pinchart u32 pclk_sample = 0; 2270eb2766dSPeter Ujfalusi u32 bus_width = 24; 228897dae56SLaurent Pinchart s32 deskew = 0; 229897dae56SLaurent Pinchart 230897dae56SLaurent Pinchart /* Start with defaults. */ 231897dae56SLaurent Pinchart *timings = tfp410_default_timings; 232897dae56SLaurent Pinchart 233897dae56SLaurent Pinchart if (i2c) 234897dae56SLaurent Pinchart /* 235897dae56SLaurent Pinchart * In I2C mode timings are configured through the I2C interface. 236897dae56SLaurent Pinchart * As the driver doesn't support I2C configuration yet, we just 237897dae56SLaurent Pinchart * go with the defaults (BSEL=1, DSEL=1, DKEN=0, EDGE=1). 238897dae56SLaurent Pinchart */ 239897dae56SLaurent Pinchart return 0; 240897dae56SLaurent Pinchart 241897dae56SLaurent Pinchart /* 242897dae56SLaurent Pinchart * In non-I2C mode, timings are configured through the BSEL, DSEL, DKEN 243897dae56SLaurent Pinchart * and EDGE pins. They are specified in DT through endpoint properties 244897dae56SLaurent Pinchart * and vendor-specific properties. 245897dae56SLaurent Pinchart */ 246897dae56SLaurent Pinchart ep = of_graph_get_endpoint_by_regs(dvi->dev->of_node, 0, 0); 247897dae56SLaurent Pinchart if (!ep) 248897dae56SLaurent Pinchart return -EINVAL; 249897dae56SLaurent Pinchart 250897dae56SLaurent Pinchart /* Get the sampling edge from the endpoint. */ 251897dae56SLaurent Pinchart of_property_read_u32(ep, "pclk-sample", &pclk_sample); 2520eb2766dSPeter Ujfalusi of_property_read_u32(ep, "bus-width", &bus_width); 253897dae56SLaurent Pinchart of_node_put(ep); 254897dae56SLaurent Pinchart 255897dae56SLaurent Pinchart timings->input_bus_flags = DRM_BUS_FLAG_DE_HIGH; 256897dae56SLaurent Pinchart 257897dae56SLaurent Pinchart switch (pclk_sample) { 258897dae56SLaurent Pinchart case 0: 259897dae56SLaurent Pinchart timings->input_bus_flags |= DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE 260897dae56SLaurent Pinchart | DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE; 261897dae56SLaurent Pinchart break; 262897dae56SLaurent Pinchart case 1: 263897dae56SLaurent Pinchart timings->input_bus_flags |= DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE 264897dae56SLaurent Pinchart | DRM_BUS_FLAG_SYNC_SAMPLE_POSEDGE; 265897dae56SLaurent Pinchart break; 266897dae56SLaurent Pinchart default: 267897dae56SLaurent Pinchart return -EINVAL; 268897dae56SLaurent Pinchart } 269897dae56SLaurent Pinchart 2700eb2766dSPeter Ujfalusi switch (bus_width) { 2710eb2766dSPeter Ujfalusi case 12: 2720eb2766dSPeter Ujfalusi dvi->bus_format = MEDIA_BUS_FMT_RGB888_2X12_LE; 2730eb2766dSPeter Ujfalusi break; 2740eb2766dSPeter Ujfalusi case 24: 2750eb2766dSPeter Ujfalusi dvi->bus_format = MEDIA_BUS_FMT_RGB888_1X24; 2760eb2766dSPeter Ujfalusi break; 2770eb2766dSPeter Ujfalusi default: 2780eb2766dSPeter Ujfalusi return -EINVAL; 2790eb2766dSPeter Ujfalusi } 2800eb2766dSPeter Ujfalusi 281897dae56SLaurent Pinchart /* Get the setup and hold time from vendor-specific properties. */ 282897dae56SLaurent Pinchart of_property_read_u32(dvi->dev->of_node, "ti,deskew", (u32 *)&deskew); 283897dae56SLaurent Pinchart if (deskew < -4 || deskew > 3) 284897dae56SLaurent Pinchart return -EINVAL; 285897dae56SLaurent Pinchart 286897dae56SLaurent Pinchart timings->setup_time_ps = min(0, 1200 - 350 * deskew); 287897dae56SLaurent Pinchart timings->hold_time_ps = min(0, 1300 + 350 * deskew); 288897dae56SLaurent Pinchart 289897dae56SLaurent Pinchart return 0; 290897dae56SLaurent Pinchart } 291897dae56SLaurent Pinchart 292f56c9202SChristopher Spinrath static int tfp410_get_connector_properties(struct tfp410 *dvi) 293dc55ac3bSJyri Sarha { 29486418f90SRob Herring struct device_node *connector_node, *ddc_phandle; 295dc55ac3bSJyri Sarha int ret = 0; 296dc55ac3bSJyri Sarha 297dc55ac3bSJyri Sarha /* port@1 is the connector node */ 29886418f90SRob Herring connector_node = of_graph_get_remote_node(dvi->dev->of_node, 1, -1); 299dc55ac3bSJyri Sarha if (!connector_node) 30086418f90SRob Herring return -ENODEV; 301dc55ac3bSJyri Sarha 30260b903c3SLaurent Pinchart if (of_device_is_compatible(connector_node, "hdmi-connector")) 30360b903c3SLaurent Pinchart dvi->connector_type = DRM_MODE_CONNECTOR_HDMIA; 30460b903c3SLaurent Pinchart else 30560b903c3SLaurent Pinchart dvi->connector_type = DRM_MODE_CONNECTOR_DVID; 30660b903c3SLaurent Pinchart 3078b598e7fSDmitry Torokhov dvi->hpd = fwnode_gpiod_get_index(&connector_node->fwnode, 3088b598e7fSDmitry Torokhov "hpd", 0, GPIOD_IN, "hpd"); 309f56c9202SChristopher Spinrath if (IS_ERR(dvi->hpd)) { 310f56c9202SChristopher Spinrath ret = PTR_ERR(dvi->hpd); 311f56c9202SChristopher Spinrath dvi->hpd = NULL; 312f56c9202SChristopher Spinrath if (ret == -ENOENT) 313f56c9202SChristopher Spinrath ret = 0; 314f56c9202SChristopher Spinrath else 315f56c9202SChristopher Spinrath goto fail; 316f56c9202SChristopher Spinrath } 317f56c9202SChristopher Spinrath 318dc55ac3bSJyri Sarha ddc_phandle = of_parse_phandle(connector_node, "ddc-i2c-bus", 0); 319dc55ac3bSJyri Sarha if (!ddc_phandle) 320dc55ac3bSJyri Sarha goto fail; 321dc55ac3bSJyri Sarha 322dc55ac3bSJyri Sarha dvi->ddc = of_get_i2c_adapter_by_node(ddc_phandle); 323dc55ac3bSJyri Sarha if (dvi->ddc) 324dc55ac3bSJyri Sarha dev_info(dvi->dev, "Connector's ddc i2c bus found\n"); 325dc55ac3bSJyri Sarha else 326dc55ac3bSJyri Sarha ret = -EPROBE_DEFER; 327dc55ac3bSJyri Sarha 328dc55ac3bSJyri Sarha of_node_put(ddc_phandle); 32986418f90SRob Herring 33086418f90SRob Herring fail: 33186418f90SRob Herring of_node_put(connector_node); 332dc55ac3bSJyri Sarha return ret; 333dc55ac3bSJyri Sarha } 334dc55ac3bSJyri Sarha 335897dae56SLaurent Pinchart static int tfp410_init(struct device *dev, bool i2c) 336dc55ac3bSJyri Sarha { 337dc55ac3bSJyri Sarha struct tfp410 *dvi; 338dc55ac3bSJyri Sarha int ret; 339dc55ac3bSJyri Sarha 340dc55ac3bSJyri Sarha if (!dev->of_node) { 341dc55ac3bSJyri Sarha dev_err(dev, "device-tree data is missing\n"); 342dc55ac3bSJyri Sarha return -ENXIO; 343dc55ac3bSJyri Sarha } 344dc55ac3bSJyri Sarha 345dc55ac3bSJyri Sarha dvi = devm_kzalloc(dev, sizeof(*dvi), GFP_KERNEL); 346dc55ac3bSJyri Sarha if (!dvi) 347dc55ac3bSJyri Sarha return -ENOMEM; 348dc55ac3bSJyri Sarha dev_set_drvdata(dev, dvi); 349dc55ac3bSJyri Sarha 350dc55ac3bSJyri Sarha dvi->bridge.funcs = &tfp410_bridge_funcs; 351dc55ac3bSJyri Sarha dvi->bridge.of_node = dev->of_node; 352897dae56SLaurent Pinchart dvi->bridge.timings = &dvi->timings; 353dc55ac3bSJyri Sarha dvi->dev = dev; 354dc55ac3bSJyri Sarha 355897dae56SLaurent Pinchart ret = tfp410_parse_timings(dvi, i2c); 356897dae56SLaurent Pinchart if (ret) 357897dae56SLaurent Pinchart goto fail; 358897dae56SLaurent Pinchart 359f56c9202SChristopher Spinrath ret = tfp410_get_connector_properties(dvi); 360dc55ac3bSJyri Sarha if (ret) 361dc55ac3bSJyri Sarha goto fail; 362dc55ac3bSJyri Sarha 36338c02db7SLaurent Pinchart dvi->powerdown = devm_gpiod_get_optional(dev, "powerdown", 36438c02db7SLaurent Pinchart GPIOD_OUT_HIGH); 36538c02db7SLaurent Pinchart if (IS_ERR(dvi->powerdown)) { 36638c02db7SLaurent Pinchart dev_err(dev, "failed to parse powerdown gpio\n"); 36738c02db7SLaurent Pinchart return PTR_ERR(dvi->powerdown); 36838c02db7SLaurent Pinchart } 36938c02db7SLaurent Pinchart 3703d31e215SPeter Ujfalusi if (dvi->hpd) 3713d31e215SPeter Ujfalusi dvi->hpd_irq = gpiod_to_irq(dvi->hpd); 3723d31e215SPeter Ujfalusi else 3733d31e215SPeter Ujfalusi dvi->hpd_irq = -ENXIO; 3743d31e215SPeter Ujfalusi 3753d31e215SPeter Ujfalusi if (dvi->hpd_irq >= 0) { 376f56c9202SChristopher Spinrath INIT_DELAYED_WORK(&dvi->hpd_work, tfp410_hpd_work_func); 377f56c9202SChristopher Spinrath 3783d31e215SPeter Ujfalusi ret = devm_request_threaded_irq(dev, dvi->hpd_irq, 379f56c9202SChristopher Spinrath NULL, tfp410_hpd_irq_thread, IRQF_TRIGGER_RISING | 380f56c9202SChristopher Spinrath IRQF_TRIGGER_FALLING | IRQF_ONESHOT, 381f56c9202SChristopher Spinrath "hdmi-hpd", dvi); 382f56c9202SChristopher Spinrath if (ret) { 383f56c9202SChristopher Spinrath DRM_ERROR("failed to register hpd interrupt\n"); 384f56c9202SChristopher Spinrath goto fail; 385f56c9202SChristopher Spinrath } 386f56c9202SChristopher Spinrath } 387f56c9202SChristopher Spinrath 388f74c5275SInki Dae drm_bridge_add(&dvi->bridge); 389dc55ac3bSJyri Sarha 390dc55ac3bSJyri Sarha return 0; 391dc55ac3bSJyri Sarha fail: 392dc55ac3bSJyri Sarha i2c_put_adapter(dvi->ddc); 393f56c9202SChristopher Spinrath if (dvi->hpd) 394f56c9202SChristopher Spinrath gpiod_put(dvi->hpd); 395dc55ac3bSJyri Sarha return ret; 396dc55ac3bSJyri Sarha } 397dc55ac3bSJyri Sarha 398dc55ac3bSJyri Sarha static int tfp410_fini(struct device *dev) 399dc55ac3bSJyri Sarha { 400dc55ac3bSJyri Sarha struct tfp410 *dvi = dev_get_drvdata(dev); 401dc55ac3bSJyri Sarha 402b1622cb3STomi Valkeinen if (dvi->hpd_irq >= 0) 403f56c9202SChristopher Spinrath cancel_delayed_work_sync(&dvi->hpd_work); 404f56c9202SChristopher Spinrath 405dc55ac3bSJyri Sarha drm_bridge_remove(&dvi->bridge); 406dc55ac3bSJyri Sarha 407dc55ac3bSJyri Sarha if (dvi->ddc) 408dc55ac3bSJyri Sarha i2c_put_adapter(dvi->ddc); 409f56c9202SChristopher Spinrath if (dvi->hpd) 410f56c9202SChristopher Spinrath gpiod_put(dvi->hpd); 411dc55ac3bSJyri Sarha 412dc55ac3bSJyri Sarha return 0; 413dc55ac3bSJyri Sarha } 414dc55ac3bSJyri Sarha 415dc55ac3bSJyri Sarha static int tfp410_probe(struct platform_device *pdev) 416dc55ac3bSJyri Sarha { 417897dae56SLaurent Pinchart return tfp410_init(&pdev->dev, false); 418dc55ac3bSJyri Sarha } 419dc55ac3bSJyri Sarha 420dc55ac3bSJyri Sarha static int tfp410_remove(struct platform_device *pdev) 421dc55ac3bSJyri Sarha { 422dc55ac3bSJyri Sarha return tfp410_fini(&pdev->dev); 423dc55ac3bSJyri Sarha } 424dc55ac3bSJyri Sarha 425dc55ac3bSJyri Sarha static const struct of_device_id tfp410_match[] = { 426dc55ac3bSJyri Sarha { .compatible = "ti,tfp410" }, 427dc55ac3bSJyri Sarha {}, 428dc55ac3bSJyri Sarha }; 429dc55ac3bSJyri Sarha MODULE_DEVICE_TABLE(of, tfp410_match); 430dc55ac3bSJyri Sarha 4315b47d089SWei Yongjun static struct platform_driver tfp410_platform_driver = { 432dc55ac3bSJyri Sarha .probe = tfp410_probe, 433dc55ac3bSJyri Sarha .remove = tfp410_remove, 434dc55ac3bSJyri Sarha .driver = { 435dc55ac3bSJyri Sarha .name = "tfp410-bridge", 436dc55ac3bSJyri Sarha .of_match_table = tfp410_match, 437dc55ac3bSJyri Sarha }, 438dc55ac3bSJyri Sarha }; 439dc55ac3bSJyri Sarha 440dc55ac3bSJyri Sarha #if IS_ENABLED(CONFIG_I2C) 441dc55ac3bSJyri Sarha /* There is currently no i2c functionality. */ 442dc55ac3bSJyri Sarha static int tfp410_i2c_probe(struct i2c_client *client, 443dc55ac3bSJyri Sarha const struct i2c_device_id *id) 444dc55ac3bSJyri Sarha { 445dc55ac3bSJyri Sarha int reg; 446dc55ac3bSJyri Sarha 447dc55ac3bSJyri Sarha if (!client->dev.of_node || 448dc55ac3bSJyri Sarha of_property_read_u32(client->dev.of_node, "reg", ®)) { 449dc55ac3bSJyri Sarha dev_err(&client->dev, 450dc55ac3bSJyri Sarha "Can't get i2c reg property from device-tree\n"); 451dc55ac3bSJyri Sarha return -ENXIO; 452dc55ac3bSJyri Sarha } 453dc55ac3bSJyri Sarha 454897dae56SLaurent Pinchart return tfp410_init(&client->dev, true); 455dc55ac3bSJyri Sarha } 456dc55ac3bSJyri Sarha 457dc55ac3bSJyri Sarha static int tfp410_i2c_remove(struct i2c_client *client) 458dc55ac3bSJyri Sarha { 459dc55ac3bSJyri Sarha return tfp410_fini(&client->dev); 460dc55ac3bSJyri Sarha } 461dc55ac3bSJyri Sarha 462dc55ac3bSJyri Sarha static const struct i2c_device_id tfp410_i2c_ids[] = { 463dc55ac3bSJyri Sarha { "tfp410", 0 }, 464dc55ac3bSJyri Sarha { } 465dc55ac3bSJyri Sarha }; 466dc55ac3bSJyri Sarha MODULE_DEVICE_TABLE(i2c, tfp410_i2c_ids); 467dc55ac3bSJyri Sarha 468dc55ac3bSJyri Sarha static struct i2c_driver tfp410_i2c_driver = { 469dc55ac3bSJyri Sarha .driver = { 470dc55ac3bSJyri Sarha .name = "tfp410", 471dc55ac3bSJyri Sarha .of_match_table = of_match_ptr(tfp410_match), 472dc55ac3bSJyri Sarha }, 473dc55ac3bSJyri Sarha .id_table = tfp410_i2c_ids, 474dc55ac3bSJyri Sarha .probe = tfp410_i2c_probe, 475dc55ac3bSJyri Sarha .remove = tfp410_i2c_remove, 476dc55ac3bSJyri Sarha }; 477dc55ac3bSJyri Sarha #endif /* IS_ENABLED(CONFIG_I2C) */ 478dc55ac3bSJyri Sarha 479dc55ac3bSJyri Sarha static struct { 480dc55ac3bSJyri Sarha uint i2c:1; 481dc55ac3bSJyri Sarha uint platform:1; 482dc55ac3bSJyri Sarha } tfp410_registered_driver; 483dc55ac3bSJyri Sarha 484dc55ac3bSJyri Sarha static int __init tfp410_module_init(void) 485dc55ac3bSJyri Sarha { 486dc55ac3bSJyri Sarha int ret; 487dc55ac3bSJyri Sarha 488dc55ac3bSJyri Sarha #if IS_ENABLED(CONFIG_I2C) 489dc55ac3bSJyri Sarha ret = i2c_add_driver(&tfp410_i2c_driver); 490dc55ac3bSJyri Sarha if (ret) 491dc55ac3bSJyri Sarha pr_err("%s: registering i2c driver failed: %d", 492dc55ac3bSJyri Sarha __func__, ret); 493dc55ac3bSJyri Sarha else 494dc55ac3bSJyri Sarha tfp410_registered_driver.i2c = 1; 495dc55ac3bSJyri Sarha #endif 496dc55ac3bSJyri Sarha 497dc55ac3bSJyri Sarha ret = platform_driver_register(&tfp410_platform_driver); 498dc55ac3bSJyri Sarha if (ret) 499dc55ac3bSJyri Sarha pr_err("%s: registering platform driver failed: %d", 500dc55ac3bSJyri Sarha __func__, ret); 501dc55ac3bSJyri Sarha else 502dc55ac3bSJyri Sarha tfp410_registered_driver.platform = 1; 503dc55ac3bSJyri Sarha 504dc55ac3bSJyri Sarha if (tfp410_registered_driver.i2c || 505dc55ac3bSJyri Sarha tfp410_registered_driver.platform) 506dc55ac3bSJyri Sarha return 0; 507dc55ac3bSJyri Sarha 508dc55ac3bSJyri Sarha return ret; 509dc55ac3bSJyri Sarha } 510dc55ac3bSJyri Sarha module_init(tfp410_module_init); 511dc55ac3bSJyri Sarha 512dc55ac3bSJyri Sarha static void __exit tfp410_module_exit(void) 513dc55ac3bSJyri Sarha { 514dc55ac3bSJyri Sarha #if IS_ENABLED(CONFIG_I2C) 515dc55ac3bSJyri Sarha if (tfp410_registered_driver.i2c) 516dc55ac3bSJyri Sarha i2c_del_driver(&tfp410_i2c_driver); 517dc55ac3bSJyri Sarha #endif 518dc55ac3bSJyri Sarha if (tfp410_registered_driver.platform) 519dc55ac3bSJyri Sarha platform_driver_unregister(&tfp410_platform_driver); 520dc55ac3bSJyri Sarha } 521dc55ac3bSJyri Sarha module_exit(tfp410_module_exit); 522dc55ac3bSJyri Sarha 523dc55ac3bSJyri Sarha MODULE_AUTHOR("Jyri Sarha <jsarha@ti.com>"); 524dc55ac3bSJyri Sarha MODULE_DESCRIPTION("TI TFP410 DVI bridge driver"); 525dc55ac3bSJyri Sarha MODULE_LICENSE("GPL"); 526