1dc55ac3bSJyri Sarha /* 2dc55ac3bSJyri Sarha * Copyright (C) 2016 Texas Instruments 3dc55ac3bSJyri Sarha * Author: Jyri Sarha <jsarha@ti.com> 4dc55ac3bSJyri Sarha * 5dc55ac3bSJyri Sarha * This program is free software; you can redistribute it and/or modify it 6dc55ac3bSJyri Sarha * under the terms of the GNU General Public License version 2 as published by 7dc55ac3bSJyri Sarha * the Free Software Foundation. 8dc55ac3bSJyri Sarha * 9dc55ac3bSJyri Sarha */ 10dc55ac3bSJyri Sarha 11f56c9202SChristopher Spinrath #include <linux/delay.h> 12f56c9202SChristopher Spinrath #include <linux/fwnode.h> 13f56c9202SChristopher Spinrath #include <linux/gpio/consumer.h> 14f56c9202SChristopher Spinrath #include <linux/irq.h> 15dc55ac3bSJyri Sarha #include <linux/module.h> 16dc55ac3bSJyri Sarha #include <linux/of_graph.h> 17dc55ac3bSJyri Sarha #include <linux/platform_device.h> 18dc55ac3bSJyri Sarha #include <linux/i2c.h> 19dc55ac3bSJyri Sarha 20dc55ac3bSJyri Sarha #include <drm/drmP.h> 21dc55ac3bSJyri Sarha #include <drm/drm_atomic_helper.h> 22dc55ac3bSJyri Sarha #include <drm/drm_crtc.h> 23fcd70cd3SDaniel Vetter #include <drm/drm_probe_helper.h> 24dc55ac3bSJyri Sarha 25f56c9202SChristopher Spinrath #define HOTPLUG_DEBOUNCE_MS 1100 26f56c9202SChristopher Spinrath 27dc55ac3bSJyri Sarha struct tfp410 { 28dc55ac3bSJyri Sarha struct drm_bridge bridge; 29dc55ac3bSJyri Sarha struct drm_connector connector; 3060b903c3SLaurent Pinchart unsigned int connector_type; 31dc55ac3bSJyri Sarha 32*0eb2766dSPeter Ujfalusi u32 bus_format; 33dc55ac3bSJyri Sarha struct i2c_adapter *ddc; 34f56c9202SChristopher Spinrath struct gpio_desc *hpd; 353d31e215SPeter Ujfalusi int hpd_irq; 36f56c9202SChristopher Spinrath struct delayed_work hpd_work; 3738c02db7SLaurent Pinchart struct gpio_desc *powerdown; 38dc55ac3bSJyri Sarha 39897dae56SLaurent Pinchart struct drm_bridge_timings timings; 40897dae56SLaurent Pinchart 41dc55ac3bSJyri Sarha struct device *dev; 42dc55ac3bSJyri Sarha }; 43dc55ac3bSJyri Sarha 44dc55ac3bSJyri Sarha static inline struct tfp410 * 45dc55ac3bSJyri Sarha drm_bridge_to_tfp410(struct drm_bridge *bridge) 46dc55ac3bSJyri Sarha { 47dc55ac3bSJyri Sarha return container_of(bridge, struct tfp410, bridge); 48dc55ac3bSJyri Sarha } 49dc55ac3bSJyri Sarha 50dc55ac3bSJyri Sarha static inline struct tfp410 * 51dc55ac3bSJyri Sarha drm_connector_to_tfp410(struct drm_connector *connector) 52dc55ac3bSJyri Sarha { 53dc55ac3bSJyri Sarha return container_of(connector, struct tfp410, connector); 54dc55ac3bSJyri Sarha } 55dc55ac3bSJyri Sarha 56dc55ac3bSJyri Sarha static int tfp410_get_modes(struct drm_connector *connector) 57dc55ac3bSJyri Sarha { 58dc55ac3bSJyri Sarha struct tfp410 *dvi = drm_connector_to_tfp410(connector); 59dc55ac3bSJyri Sarha struct edid *edid; 60dc55ac3bSJyri Sarha int ret; 61dc55ac3bSJyri Sarha 62dc55ac3bSJyri Sarha if (!dvi->ddc) 63dc55ac3bSJyri Sarha goto fallback; 64dc55ac3bSJyri Sarha 65dc55ac3bSJyri Sarha edid = drm_get_edid(connector, dvi->ddc); 66dc55ac3bSJyri Sarha if (!edid) { 67dc55ac3bSJyri Sarha DRM_INFO("EDID read failed. Fallback to standard modes\n"); 68dc55ac3bSJyri Sarha goto fallback; 69dc55ac3bSJyri Sarha } 70dc55ac3bSJyri Sarha 71c555f023SDaniel Vetter drm_connector_update_edid_property(connector, edid); 72dc55ac3bSJyri Sarha 73dc55ac3bSJyri Sarha return drm_add_edid_modes(connector, edid); 74dc55ac3bSJyri Sarha fallback: 75dc55ac3bSJyri Sarha /* No EDID, fallback on the XGA standard modes */ 76dc55ac3bSJyri Sarha ret = drm_add_modes_noedid(connector, 1920, 1200); 77dc55ac3bSJyri Sarha 78dc55ac3bSJyri Sarha /* And prefer a mode pretty much anything can handle */ 79dc55ac3bSJyri Sarha drm_set_preferred_mode(connector, 1024, 768); 80dc55ac3bSJyri Sarha 81dc55ac3bSJyri Sarha return ret; 82dc55ac3bSJyri Sarha } 83dc55ac3bSJyri Sarha 84dc55ac3bSJyri Sarha static const struct drm_connector_helper_funcs tfp410_con_helper_funcs = { 85dc55ac3bSJyri Sarha .get_modes = tfp410_get_modes, 86dc55ac3bSJyri Sarha }; 87dc55ac3bSJyri Sarha 88dc55ac3bSJyri Sarha static enum drm_connector_status 89dc55ac3bSJyri Sarha tfp410_connector_detect(struct drm_connector *connector, bool force) 90dc55ac3bSJyri Sarha { 91dc55ac3bSJyri Sarha struct tfp410 *dvi = drm_connector_to_tfp410(connector); 92dc55ac3bSJyri Sarha 93f56c9202SChristopher Spinrath if (dvi->hpd) { 94f56c9202SChristopher Spinrath if (gpiod_get_value_cansleep(dvi->hpd)) 95f56c9202SChristopher Spinrath return connector_status_connected; 96f56c9202SChristopher Spinrath else 97f56c9202SChristopher Spinrath return connector_status_disconnected; 98f56c9202SChristopher Spinrath } 99f56c9202SChristopher Spinrath 100dc55ac3bSJyri Sarha if (dvi->ddc) { 101dc55ac3bSJyri Sarha if (drm_probe_ddc(dvi->ddc)) 102dc55ac3bSJyri Sarha return connector_status_connected; 103dc55ac3bSJyri Sarha else 104dc55ac3bSJyri Sarha return connector_status_disconnected; 105dc55ac3bSJyri Sarha } 106dc55ac3bSJyri Sarha 107dc55ac3bSJyri Sarha return connector_status_unknown; 108dc55ac3bSJyri Sarha } 109dc55ac3bSJyri Sarha 110dc55ac3bSJyri Sarha static const struct drm_connector_funcs tfp410_con_funcs = { 111dc55ac3bSJyri Sarha .detect = tfp410_connector_detect, 112dc55ac3bSJyri Sarha .fill_modes = drm_helper_probe_single_connector_modes, 113dc55ac3bSJyri Sarha .destroy = drm_connector_cleanup, 114dc55ac3bSJyri Sarha .reset = drm_atomic_helper_connector_reset, 115dc55ac3bSJyri Sarha .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 116dc55ac3bSJyri Sarha .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 117dc55ac3bSJyri Sarha }; 118dc55ac3bSJyri Sarha 119dc55ac3bSJyri Sarha static int tfp410_attach(struct drm_bridge *bridge) 120dc55ac3bSJyri Sarha { 121dc55ac3bSJyri Sarha struct tfp410 *dvi = drm_bridge_to_tfp410(bridge); 122dc55ac3bSJyri Sarha int ret; 123dc55ac3bSJyri Sarha 124dc55ac3bSJyri Sarha if (!bridge->encoder) { 125dc55ac3bSJyri Sarha dev_err(dvi->dev, "Missing encoder\n"); 126dc55ac3bSJyri Sarha return -ENODEV; 127dc55ac3bSJyri Sarha } 128dc55ac3bSJyri Sarha 1293d31e215SPeter Ujfalusi if (dvi->hpd_irq >= 0) 130f56c9202SChristopher Spinrath dvi->connector.polled = DRM_CONNECTOR_POLL_HPD; 1313d31e215SPeter Ujfalusi else 1323d31e215SPeter Ujfalusi dvi->connector.polled = DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT; 133f56c9202SChristopher Spinrath 134dc55ac3bSJyri Sarha drm_connector_helper_add(&dvi->connector, 135dc55ac3bSJyri Sarha &tfp410_con_helper_funcs); 136dc55ac3bSJyri Sarha ret = drm_connector_init(bridge->dev, &dvi->connector, 13760b903c3SLaurent Pinchart &tfp410_con_funcs, dvi->connector_type); 138dc55ac3bSJyri Sarha if (ret) { 139dc55ac3bSJyri Sarha dev_err(dvi->dev, "drm_connector_init() failed: %d\n", ret); 140dc55ac3bSJyri Sarha return ret; 141dc55ac3bSJyri Sarha } 142dc55ac3bSJyri Sarha 143*0eb2766dSPeter Ujfalusi drm_display_info_set_bus_formats(&dvi->connector.display_info, 144*0eb2766dSPeter Ujfalusi &dvi->bus_format, 1); 145*0eb2766dSPeter Ujfalusi 146cde4c44dSDaniel Vetter drm_connector_attach_encoder(&dvi->connector, 147dc55ac3bSJyri Sarha bridge->encoder); 148dc55ac3bSJyri Sarha 149dc55ac3bSJyri Sarha return 0; 150dc55ac3bSJyri Sarha } 151dc55ac3bSJyri Sarha 15238c02db7SLaurent Pinchart static void tfp410_enable(struct drm_bridge *bridge) 15338c02db7SLaurent Pinchart { 15438c02db7SLaurent Pinchart struct tfp410 *dvi = drm_bridge_to_tfp410(bridge); 15538c02db7SLaurent Pinchart 15638c02db7SLaurent Pinchart gpiod_set_value_cansleep(dvi->powerdown, 0); 15738c02db7SLaurent Pinchart } 15838c02db7SLaurent Pinchart 15938c02db7SLaurent Pinchart static void tfp410_disable(struct drm_bridge *bridge) 16038c02db7SLaurent Pinchart { 16138c02db7SLaurent Pinchart struct tfp410 *dvi = drm_bridge_to_tfp410(bridge); 16238c02db7SLaurent Pinchart 16338c02db7SLaurent Pinchart gpiod_set_value_cansleep(dvi->powerdown, 1); 16438c02db7SLaurent Pinchart } 16538c02db7SLaurent Pinchart 166dc55ac3bSJyri Sarha static const struct drm_bridge_funcs tfp410_bridge_funcs = { 167dc55ac3bSJyri Sarha .attach = tfp410_attach, 16838c02db7SLaurent Pinchart .enable = tfp410_enable, 16938c02db7SLaurent Pinchart .disable = tfp410_disable, 170dc55ac3bSJyri Sarha }; 171dc55ac3bSJyri Sarha 172f56c9202SChristopher Spinrath static void tfp410_hpd_work_func(struct work_struct *work) 173f56c9202SChristopher Spinrath { 174f56c9202SChristopher Spinrath struct tfp410 *dvi; 175f56c9202SChristopher Spinrath 176f56c9202SChristopher Spinrath dvi = container_of(work, struct tfp410, hpd_work.work); 177f56c9202SChristopher Spinrath 178f56c9202SChristopher Spinrath if (dvi->bridge.dev) 179f56c9202SChristopher Spinrath drm_helper_hpd_irq_event(dvi->bridge.dev); 180f56c9202SChristopher Spinrath } 181f56c9202SChristopher Spinrath 182f56c9202SChristopher Spinrath static irqreturn_t tfp410_hpd_irq_thread(int irq, void *arg) 183f56c9202SChristopher Spinrath { 184f56c9202SChristopher Spinrath struct tfp410 *dvi = arg; 185f56c9202SChristopher Spinrath 186f56c9202SChristopher Spinrath mod_delayed_work(system_wq, &dvi->hpd_work, 187f56c9202SChristopher Spinrath msecs_to_jiffies(HOTPLUG_DEBOUNCE_MS)); 188f56c9202SChristopher Spinrath 189f56c9202SChristopher Spinrath return IRQ_HANDLED; 190f56c9202SChristopher Spinrath } 191f56c9202SChristopher Spinrath 192897dae56SLaurent Pinchart static const struct drm_bridge_timings tfp410_default_timings = { 193897dae56SLaurent Pinchart .input_bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE 194897dae56SLaurent Pinchart | DRM_BUS_FLAG_DE_HIGH, 195897dae56SLaurent Pinchart .setup_time_ps = 1200, 196897dae56SLaurent Pinchart .hold_time_ps = 1300, 197897dae56SLaurent Pinchart }; 198897dae56SLaurent Pinchart 199897dae56SLaurent Pinchart static int tfp410_parse_timings(struct tfp410 *dvi, bool i2c) 200897dae56SLaurent Pinchart { 201897dae56SLaurent Pinchart struct drm_bridge_timings *timings = &dvi->timings; 202897dae56SLaurent Pinchart struct device_node *ep; 203897dae56SLaurent Pinchart u32 pclk_sample = 0; 204*0eb2766dSPeter Ujfalusi u32 bus_width = 24; 205897dae56SLaurent Pinchart s32 deskew = 0; 206897dae56SLaurent Pinchart 207897dae56SLaurent Pinchart /* Start with defaults. */ 208897dae56SLaurent Pinchart *timings = tfp410_default_timings; 209897dae56SLaurent Pinchart 210897dae56SLaurent Pinchart if (i2c) 211897dae56SLaurent Pinchart /* 212897dae56SLaurent Pinchart * In I2C mode timings are configured through the I2C interface. 213897dae56SLaurent Pinchart * As the driver doesn't support I2C configuration yet, we just 214897dae56SLaurent Pinchart * go with the defaults (BSEL=1, DSEL=1, DKEN=0, EDGE=1). 215897dae56SLaurent Pinchart */ 216897dae56SLaurent Pinchart return 0; 217897dae56SLaurent Pinchart 218897dae56SLaurent Pinchart /* 219897dae56SLaurent Pinchart * In non-I2C mode, timings are configured through the BSEL, DSEL, DKEN 220897dae56SLaurent Pinchart * and EDGE pins. They are specified in DT through endpoint properties 221897dae56SLaurent Pinchart * and vendor-specific properties. 222897dae56SLaurent Pinchart */ 223897dae56SLaurent Pinchart ep = of_graph_get_endpoint_by_regs(dvi->dev->of_node, 0, 0); 224897dae56SLaurent Pinchart if (!ep) 225897dae56SLaurent Pinchart return -EINVAL; 226897dae56SLaurent Pinchart 227897dae56SLaurent Pinchart /* Get the sampling edge from the endpoint. */ 228897dae56SLaurent Pinchart of_property_read_u32(ep, "pclk-sample", &pclk_sample); 229*0eb2766dSPeter Ujfalusi of_property_read_u32(ep, "bus-width", &bus_width); 230897dae56SLaurent Pinchart of_node_put(ep); 231897dae56SLaurent Pinchart 232897dae56SLaurent Pinchart timings->input_bus_flags = DRM_BUS_FLAG_DE_HIGH; 233897dae56SLaurent Pinchart 234897dae56SLaurent Pinchart switch (pclk_sample) { 235897dae56SLaurent Pinchart case 0: 236897dae56SLaurent Pinchart timings->input_bus_flags |= DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE 237897dae56SLaurent Pinchart | DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE; 238897dae56SLaurent Pinchart break; 239897dae56SLaurent Pinchart case 1: 240897dae56SLaurent Pinchart timings->input_bus_flags |= DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE 241897dae56SLaurent Pinchart | DRM_BUS_FLAG_SYNC_SAMPLE_POSEDGE; 242897dae56SLaurent Pinchart break; 243897dae56SLaurent Pinchart default: 244897dae56SLaurent Pinchart return -EINVAL; 245897dae56SLaurent Pinchart } 246897dae56SLaurent Pinchart 247*0eb2766dSPeter Ujfalusi switch (bus_width) { 248*0eb2766dSPeter Ujfalusi case 12: 249*0eb2766dSPeter Ujfalusi dvi->bus_format = MEDIA_BUS_FMT_RGB888_2X12_LE; 250*0eb2766dSPeter Ujfalusi break; 251*0eb2766dSPeter Ujfalusi case 24: 252*0eb2766dSPeter Ujfalusi dvi->bus_format = MEDIA_BUS_FMT_RGB888_1X24; 253*0eb2766dSPeter Ujfalusi break; 254*0eb2766dSPeter Ujfalusi default: 255*0eb2766dSPeter Ujfalusi return -EINVAL; 256*0eb2766dSPeter Ujfalusi } 257*0eb2766dSPeter Ujfalusi 258897dae56SLaurent Pinchart /* Get the setup and hold time from vendor-specific properties. */ 259897dae56SLaurent Pinchart of_property_read_u32(dvi->dev->of_node, "ti,deskew", (u32 *)&deskew); 260897dae56SLaurent Pinchart if (deskew < -4 || deskew > 3) 261897dae56SLaurent Pinchart return -EINVAL; 262897dae56SLaurent Pinchart 263897dae56SLaurent Pinchart timings->setup_time_ps = min(0, 1200 - 350 * deskew); 264897dae56SLaurent Pinchart timings->hold_time_ps = min(0, 1300 + 350 * deskew); 265897dae56SLaurent Pinchart 266897dae56SLaurent Pinchart return 0; 267897dae56SLaurent Pinchart } 268897dae56SLaurent Pinchart 269f56c9202SChristopher Spinrath static int tfp410_get_connector_properties(struct tfp410 *dvi) 270dc55ac3bSJyri Sarha { 27186418f90SRob Herring struct device_node *connector_node, *ddc_phandle; 272dc55ac3bSJyri Sarha int ret = 0; 273dc55ac3bSJyri Sarha 274dc55ac3bSJyri Sarha /* port@1 is the connector node */ 27586418f90SRob Herring connector_node = of_graph_get_remote_node(dvi->dev->of_node, 1, -1); 276dc55ac3bSJyri Sarha if (!connector_node) 27786418f90SRob Herring return -ENODEV; 278dc55ac3bSJyri Sarha 27960b903c3SLaurent Pinchart if (of_device_is_compatible(connector_node, "hdmi-connector")) 28060b903c3SLaurent Pinchart dvi->connector_type = DRM_MODE_CONNECTOR_HDMIA; 28160b903c3SLaurent Pinchart else 28260b903c3SLaurent Pinchart dvi->connector_type = DRM_MODE_CONNECTOR_DVID; 28360b903c3SLaurent Pinchart 284f56c9202SChristopher Spinrath dvi->hpd = fwnode_get_named_gpiod(&connector_node->fwnode, 285f56c9202SChristopher Spinrath "hpd-gpios", 0, GPIOD_IN, "hpd"); 286f56c9202SChristopher Spinrath if (IS_ERR(dvi->hpd)) { 287f56c9202SChristopher Spinrath ret = PTR_ERR(dvi->hpd); 288f56c9202SChristopher Spinrath dvi->hpd = NULL; 289f56c9202SChristopher Spinrath if (ret == -ENOENT) 290f56c9202SChristopher Spinrath ret = 0; 291f56c9202SChristopher Spinrath else 292f56c9202SChristopher Spinrath goto fail; 293f56c9202SChristopher Spinrath } 294f56c9202SChristopher Spinrath 295dc55ac3bSJyri Sarha ddc_phandle = of_parse_phandle(connector_node, "ddc-i2c-bus", 0); 296dc55ac3bSJyri Sarha if (!ddc_phandle) 297dc55ac3bSJyri Sarha goto fail; 298dc55ac3bSJyri Sarha 299dc55ac3bSJyri Sarha dvi->ddc = of_get_i2c_adapter_by_node(ddc_phandle); 300dc55ac3bSJyri Sarha if (dvi->ddc) 301dc55ac3bSJyri Sarha dev_info(dvi->dev, "Connector's ddc i2c bus found\n"); 302dc55ac3bSJyri Sarha else 303dc55ac3bSJyri Sarha ret = -EPROBE_DEFER; 304dc55ac3bSJyri Sarha 305dc55ac3bSJyri Sarha of_node_put(ddc_phandle); 30686418f90SRob Herring 30786418f90SRob Herring fail: 30886418f90SRob Herring of_node_put(connector_node); 309dc55ac3bSJyri Sarha return ret; 310dc55ac3bSJyri Sarha } 311dc55ac3bSJyri Sarha 312897dae56SLaurent Pinchart static int tfp410_init(struct device *dev, bool i2c) 313dc55ac3bSJyri Sarha { 314dc55ac3bSJyri Sarha struct tfp410 *dvi; 315dc55ac3bSJyri Sarha int ret; 316dc55ac3bSJyri Sarha 317dc55ac3bSJyri Sarha if (!dev->of_node) { 318dc55ac3bSJyri Sarha dev_err(dev, "device-tree data is missing\n"); 319dc55ac3bSJyri Sarha return -ENXIO; 320dc55ac3bSJyri Sarha } 321dc55ac3bSJyri Sarha 322dc55ac3bSJyri Sarha dvi = devm_kzalloc(dev, sizeof(*dvi), GFP_KERNEL); 323dc55ac3bSJyri Sarha if (!dvi) 324dc55ac3bSJyri Sarha return -ENOMEM; 325dc55ac3bSJyri Sarha dev_set_drvdata(dev, dvi); 326dc55ac3bSJyri Sarha 327dc55ac3bSJyri Sarha dvi->bridge.funcs = &tfp410_bridge_funcs; 328dc55ac3bSJyri Sarha dvi->bridge.of_node = dev->of_node; 329897dae56SLaurent Pinchart dvi->bridge.timings = &dvi->timings; 330dc55ac3bSJyri Sarha dvi->dev = dev; 331dc55ac3bSJyri Sarha 332897dae56SLaurent Pinchart ret = tfp410_parse_timings(dvi, i2c); 333897dae56SLaurent Pinchart if (ret) 334897dae56SLaurent Pinchart goto fail; 335897dae56SLaurent Pinchart 336f56c9202SChristopher Spinrath ret = tfp410_get_connector_properties(dvi); 337dc55ac3bSJyri Sarha if (ret) 338dc55ac3bSJyri Sarha goto fail; 339dc55ac3bSJyri Sarha 34038c02db7SLaurent Pinchart dvi->powerdown = devm_gpiod_get_optional(dev, "powerdown", 34138c02db7SLaurent Pinchart GPIOD_OUT_HIGH); 34238c02db7SLaurent Pinchart if (IS_ERR(dvi->powerdown)) { 34338c02db7SLaurent Pinchart dev_err(dev, "failed to parse powerdown gpio\n"); 34438c02db7SLaurent Pinchart return PTR_ERR(dvi->powerdown); 34538c02db7SLaurent Pinchart } 34638c02db7SLaurent Pinchart 3473d31e215SPeter Ujfalusi if (dvi->hpd) 3483d31e215SPeter Ujfalusi dvi->hpd_irq = gpiod_to_irq(dvi->hpd); 3493d31e215SPeter Ujfalusi else 3503d31e215SPeter Ujfalusi dvi->hpd_irq = -ENXIO; 3513d31e215SPeter Ujfalusi 3523d31e215SPeter Ujfalusi if (dvi->hpd_irq >= 0) { 353f56c9202SChristopher Spinrath INIT_DELAYED_WORK(&dvi->hpd_work, tfp410_hpd_work_func); 354f56c9202SChristopher Spinrath 3553d31e215SPeter Ujfalusi ret = devm_request_threaded_irq(dev, dvi->hpd_irq, 356f56c9202SChristopher Spinrath NULL, tfp410_hpd_irq_thread, IRQF_TRIGGER_RISING | 357f56c9202SChristopher Spinrath IRQF_TRIGGER_FALLING | IRQF_ONESHOT, 358f56c9202SChristopher Spinrath "hdmi-hpd", dvi); 359f56c9202SChristopher Spinrath if (ret) { 360f56c9202SChristopher Spinrath DRM_ERROR("failed to register hpd interrupt\n"); 361f56c9202SChristopher Spinrath goto fail; 362f56c9202SChristopher Spinrath } 363f56c9202SChristopher Spinrath } 364f56c9202SChristopher Spinrath 365f74c5275SInki Dae drm_bridge_add(&dvi->bridge); 366dc55ac3bSJyri Sarha 367dc55ac3bSJyri Sarha return 0; 368dc55ac3bSJyri Sarha fail: 369dc55ac3bSJyri Sarha i2c_put_adapter(dvi->ddc); 370f56c9202SChristopher Spinrath if (dvi->hpd) 371f56c9202SChristopher Spinrath gpiod_put(dvi->hpd); 372dc55ac3bSJyri Sarha return ret; 373dc55ac3bSJyri Sarha } 374dc55ac3bSJyri Sarha 375dc55ac3bSJyri Sarha static int tfp410_fini(struct device *dev) 376dc55ac3bSJyri Sarha { 377dc55ac3bSJyri Sarha struct tfp410 *dvi = dev_get_drvdata(dev); 378dc55ac3bSJyri Sarha 379f56c9202SChristopher Spinrath cancel_delayed_work_sync(&dvi->hpd_work); 380f56c9202SChristopher Spinrath 381dc55ac3bSJyri Sarha drm_bridge_remove(&dvi->bridge); 382dc55ac3bSJyri Sarha 383dc55ac3bSJyri Sarha if (dvi->ddc) 384dc55ac3bSJyri Sarha i2c_put_adapter(dvi->ddc); 385f56c9202SChristopher Spinrath if (dvi->hpd) 386f56c9202SChristopher Spinrath gpiod_put(dvi->hpd); 387dc55ac3bSJyri Sarha 388dc55ac3bSJyri Sarha return 0; 389dc55ac3bSJyri Sarha } 390dc55ac3bSJyri Sarha 391dc55ac3bSJyri Sarha static int tfp410_probe(struct platform_device *pdev) 392dc55ac3bSJyri Sarha { 393897dae56SLaurent Pinchart return tfp410_init(&pdev->dev, false); 394dc55ac3bSJyri Sarha } 395dc55ac3bSJyri Sarha 396dc55ac3bSJyri Sarha static int tfp410_remove(struct platform_device *pdev) 397dc55ac3bSJyri Sarha { 398dc55ac3bSJyri Sarha return tfp410_fini(&pdev->dev); 399dc55ac3bSJyri Sarha } 400dc55ac3bSJyri Sarha 401dc55ac3bSJyri Sarha static const struct of_device_id tfp410_match[] = { 402dc55ac3bSJyri Sarha { .compatible = "ti,tfp410" }, 403dc55ac3bSJyri Sarha {}, 404dc55ac3bSJyri Sarha }; 405dc55ac3bSJyri Sarha MODULE_DEVICE_TABLE(of, tfp410_match); 406dc55ac3bSJyri Sarha 4075b47d089SWei Yongjun static struct platform_driver tfp410_platform_driver = { 408dc55ac3bSJyri Sarha .probe = tfp410_probe, 409dc55ac3bSJyri Sarha .remove = tfp410_remove, 410dc55ac3bSJyri Sarha .driver = { 411dc55ac3bSJyri Sarha .name = "tfp410-bridge", 412dc55ac3bSJyri Sarha .of_match_table = tfp410_match, 413dc55ac3bSJyri Sarha }, 414dc55ac3bSJyri Sarha }; 415dc55ac3bSJyri Sarha 416dc55ac3bSJyri Sarha #if IS_ENABLED(CONFIG_I2C) 417dc55ac3bSJyri Sarha /* There is currently no i2c functionality. */ 418dc55ac3bSJyri Sarha static int tfp410_i2c_probe(struct i2c_client *client, 419dc55ac3bSJyri Sarha const struct i2c_device_id *id) 420dc55ac3bSJyri Sarha { 421dc55ac3bSJyri Sarha int reg; 422dc55ac3bSJyri Sarha 423dc55ac3bSJyri Sarha if (!client->dev.of_node || 424dc55ac3bSJyri Sarha of_property_read_u32(client->dev.of_node, "reg", ®)) { 425dc55ac3bSJyri Sarha dev_err(&client->dev, 426dc55ac3bSJyri Sarha "Can't get i2c reg property from device-tree\n"); 427dc55ac3bSJyri Sarha return -ENXIO; 428dc55ac3bSJyri Sarha } 429dc55ac3bSJyri Sarha 430897dae56SLaurent Pinchart return tfp410_init(&client->dev, true); 431dc55ac3bSJyri Sarha } 432dc55ac3bSJyri Sarha 433dc55ac3bSJyri Sarha static int tfp410_i2c_remove(struct i2c_client *client) 434dc55ac3bSJyri Sarha { 435dc55ac3bSJyri Sarha return tfp410_fini(&client->dev); 436dc55ac3bSJyri Sarha } 437dc55ac3bSJyri Sarha 438dc55ac3bSJyri Sarha static const struct i2c_device_id tfp410_i2c_ids[] = { 439dc55ac3bSJyri Sarha { "tfp410", 0 }, 440dc55ac3bSJyri Sarha { } 441dc55ac3bSJyri Sarha }; 442dc55ac3bSJyri Sarha MODULE_DEVICE_TABLE(i2c, tfp410_i2c_ids); 443dc55ac3bSJyri Sarha 444dc55ac3bSJyri Sarha static struct i2c_driver tfp410_i2c_driver = { 445dc55ac3bSJyri Sarha .driver = { 446dc55ac3bSJyri Sarha .name = "tfp410", 447dc55ac3bSJyri Sarha .of_match_table = of_match_ptr(tfp410_match), 448dc55ac3bSJyri Sarha }, 449dc55ac3bSJyri Sarha .id_table = tfp410_i2c_ids, 450dc55ac3bSJyri Sarha .probe = tfp410_i2c_probe, 451dc55ac3bSJyri Sarha .remove = tfp410_i2c_remove, 452dc55ac3bSJyri Sarha }; 453dc55ac3bSJyri Sarha #endif /* IS_ENABLED(CONFIG_I2C) */ 454dc55ac3bSJyri Sarha 455dc55ac3bSJyri Sarha static struct { 456dc55ac3bSJyri Sarha uint i2c:1; 457dc55ac3bSJyri Sarha uint platform:1; 458dc55ac3bSJyri Sarha } tfp410_registered_driver; 459dc55ac3bSJyri Sarha 460dc55ac3bSJyri Sarha static int __init tfp410_module_init(void) 461dc55ac3bSJyri Sarha { 462dc55ac3bSJyri Sarha int ret; 463dc55ac3bSJyri Sarha 464dc55ac3bSJyri Sarha #if IS_ENABLED(CONFIG_I2C) 465dc55ac3bSJyri Sarha ret = i2c_add_driver(&tfp410_i2c_driver); 466dc55ac3bSJyri Sarha if (ret) 467dc55ac3bSJyri Sarha pr_err("%s: registering i2c driver failed: %d", 468dc55ac3bSJyri Sarha __func__, ret); 469dc55ac3bSJyri Sarha else 470dc55ac3bSJyri Sarha tfp410_registered_driver.i2c = 1; 471dc55ac3bSJyri Sarha #endif 472dc55ac3bSJyri Sarha 473dc55ac3bSJyri Sarha ret = platform_driver_register(&tfp410_platform_driver); 474dc55ac3bSJyri Sarha if (ret) 475dc55ac3bSJyri Sarha pr_err("%s: registering platform driver failed: %d", 476dc55ac3bSJyri Sarha __func__, ret); 477dc55ac3bSJyri Sarha else 478dc55ac3bSJyri Sarha tfp410_registered_driver.platform = 1; 479dc55ac3bSJyri Sarha 480dc55ac3bSJyri Sarha if (tfp410_registered_driver.i2c || 481dc55ac3bSJyri Sarha tfp410_registered_driver.platform) 482dc55ac3bSJyri Sarha return 0; 483dc55ac3bSJyri Sarha 484dc55ac3bSJyri Sarha return ret; 485dc55ac3bSJyri Sarha } 486dc55ac3bSJyri Sarha module_init(tfp410_module_init); 487dc55ac3bSJyri Sarha 488dc55ac3bSJyri Sarha static void __exit tfp410_module_exit(void) 489dc55ac3bSJyri Sarha { 490dc55ac3bSJyri Sarha #if IS_ENABLED(CONFIG_I2C) 491dc55ac3bSJyri Sarha if (tfp410_registered_driver.i2c) 492dc55ac3bSJyri Sarha i2c_del_driver(&tfp410_i2c_driver); 493dc55ac3bSJyri Sarha #endif 494dc55ac3bSJyri Sarha if (tfp410_registered_driver.platform) 495dc55ac3bSJyri Sarha platform_driver_unregister(&tfp410_platform_driver); 496dc55ac3bSJyri Sarha } 497dc55ac3bSJyri Sarha module_exit(tfp410_module_exit); 498dc55ac3bSJyri Sarha 499dc55ac3bSJyri Sarha MODULE_AUTHOR("Jyri Sarha <jsarha@ti.com>"); 500dc55ac3bSJyri Sarha MODULE_DESCRIPTION("TI TFP410 DVI bridge driver"); 501dc55ac3bSJyri Sarha MODULE_LICENSE("GPL"); 502