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> 17dc55ac3bSJyri Sarha #include <drm/drm_crtc.h> 1895b60804SSam Ravnborg #include <drm/drm_print.h> 19fcd70cd3SDaniel Vetter #include <drm/drm_probe_helper.h> 20dc55ac3bSJyri Sarha 21f56c9202SChristopher Spinrath #define HOTPLUG_DEBOUNCE_MS 1100 22f56c9202SChristopher Spinrath 23dc55ac3bSJyri Sarha struct tfp410 { 24dc55ac3bSJyri Sarha struct drm_bridge bridge; 25dc55ac3bSJyri Sarha struct drm_connector connector; 2660b903c3SLaurent Pinchart unsigned int connector_type; 27dc55ac3bSJyri Sarha 280eb2766dSPeter Ujfalusi u32 bus_format; 29dc55ac3bSJyri Sarha struct i2c_adapter *ddc; 30f56c9202SChristopher Spinrath struct gpio_desc *hpd; 313d31e215SPeter Ujfalusi int hpd_irq; 32f56c9202SChristopher Spinrath struct delayed_work hpd_work; 3338c02db7SLaurent Pinchart struct gpio_desc *powerdown; 34dc55ac3bSJyri Sarha 35897dae56SLaurent Pinchart struct drm_bridge_timings timings; 36897dae56SLaurent Pinchart 37dc55ac3bSJyri Sarha struct device *dev; 38dc55ac3bSJyri Sarha }; 39dc55ac3bSJyri Sarha 40dc55ac3bSJyri Sarha static inline struct tfp410 * 41dc55ac3bSJyri Sarha drm_bridge_to_tfp410(struct drm_bridge *bridge) 42dc55ac3bSJyri Sarha { 43dc55ac3bSJyri Sarha return container_of(bridge, struct tfp410, bridge); 44dc55ac3bSJyri Sarha } 45dc55ac3bSJyri Sarha 46dc55ac3bSJyri Sarha static inline struct tfp410 * 47dc55ac3bSJyri Sarha drm_connector_to_tfp410(struct drm_connector *connector) 48dc55ac3bSJyri Sarha { 49dc55ac3bSJyri Sarha return container_of(connector, struct tfp410, connector); 50dc55ac3bSJyri Sarha } 51dc55ac3bSJyri Sarha 52dc55ac3bSJyri Sarha static int tfp410_get_modes(struct drm_connector *connector) 53dc55ac3bSJyri Sarha { 54dc55ac3bSJyri Sarha struct tfp410 *dvi = drm_connector_to_tfp410(connector); 55dc55ac3bSJyri Sarha struct edid *edid; 56dc55ac3bSJyri Sarha int ret; 57dc55ac3bSJyri Sarha 58dc55ac3bSJyri Sarha if (!dvi->ddc) 59dc55ac3bSJyri Sarha goto fallback; 60dc55ac3bSJyri Sarha 61dc55ac3bSJyri Sarha edid = drm_get_edid(connector, dvi->ddc); 62dc55ac3bSJyri Sarha if (!edid) { 63dc55ac3bSJyri Sarha DRM_INFO("EDID read failed. Fallback to standard modes\n"); 64dc55ac3bSJyri Sarha goto fallback; 65dc55ac3bSJyri Sarha } 66dc55ac3bSJyri Sarha 67c555f023SDaniel Vetter drm_connector_update_edid_property(connector, edid); 68dc55ac3bSJyri Sarha 69c08f99c3STomi Valkeinen ret = drm_add_edid_modes(connector, edid); 70c08f99c3STomi Valkeinen 71c08f99c3STomi Valkeinen kfree(edid); 72c08f99c3STomi Valkeinen 73c08f99c3STomi Valkeinen return ret; 74c08f99c3STomi Valkeinen 75dc55ac3bSJyri Sarha fallback: 76dc55ac3bSJyri Sarha /* No EDID, fallback on the XGA standard modes */ 77dc55ac3bSJyri Sarha ret = drm_add_modes_noedid(connector, 1920, 1200); 78dc55ac3bSJyri Sarha 79dc55ac3bSJyri Sarha /* And prefer a mode pretty much anything can handle */ 80dc55ac3bSJyri Sarha drm_set_preferred_mode(connector, 1024, 768); 81dc55ac3bSJyri Sarha 82dc55ac3bSJyri Sarha return ret; 83dc55ac3bSJyri Sarha } 84dc55ac3bSJyri Sarha 85dc55ac3bSJyri Sarha static const struct drm_connector_helper_funcs tfp410_con_helper_funcs = { 86dc55ac3bSJyri Sarha .get_modes = tfp410_get_modes, 87dc55ac3bSJyri Sarha }; 88dc55ac3bSJyri Sarha 89dc55ac3bSJyri Sarha static enum drm_connector_status 90dc55ac3bSJyri Sarha tfp410_connector_detect(struct drm_connector *connector, bool force) 91dc55ac3bSJyri Sarha { 92dc55ac3bSJyri Sarha struct tfp410 *dvi = drm_connector_to_tfp410(connector); 93dc55ac3bSJyri Sarha 94f56c9202SChristopher Spinrath if (dvi->hpd) { 95f56c9202SChristopher Spinrath if (gpiod_get_value_cansleep(dvi->hpd)) 96f56c9202SChristopher Spinrath return connector_status_connected; 97f56c9202SChristopher Spinrath else 98f56c9202SChristopher Spinrath return connector_status_disconnected; 99f56c9202SChristopher Spinrath } 100f56c9202SChristopher Spinrath 101dc55ac3bSJyri Sarha if (dvi->ddc) { 102dc55ac3bSJyri Sarha if (drm_probe_ddc(dvi->ddc)) 103dc55ac3bSJyri Sarha return connector_status_connected; 104dc55ac3bSJyri Sarha else 105dc55ac3bSJyri Sarha return connector_status_disconnected; 106dc55ac3bSJyri Sarha } 107dc55ac3bSJyri Sarha 108dc55ac3bSJyri Sarha return connector_status_unknown; 109dc55ac3bSJyri Sarha } 110dc55ac3bSJyri Sarha 111dc55ac3bSJyri Sarha static const struct drm_connector_funcs tfp410_con_funcs = { 112dc55ac3bSJyri Sarha .detect = tfp410_connector_detect, 113dc55ac3bSJyri Sarha .fill_modes = drm_helper_probe_single_connector_modes, 114dc55ac3bSJyri Sarha .destroy = drm_connector_cleanup, 115dc55ac3bSJyri Sarha .reset = drm_atomic_helper_connector_reset, 116dc55ac3bSJyri Sarha .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 117dc55ac3bSJyri Sarha .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 118dc55ac3bSJyri Sarha }; 119dc55ac3bSJyri Sarha 120dc55ac3bSJyri Sarha static int tfp410_attach(struct drm_bridge *bridge) 121dc55ac3bSJyri Sarha { 122dc55ac3bSJyri Sarha struct tfp410 *dvi = drm_bridge_to_tfp410(bridge); 123dc55ac3bSJyri Sarha int ret; 124dc55ac3bSJyri Sarha 125dc55ac3bSJyri Sarha if (!bridge->encoder) { 126dc55ac3bSJyri Sarha dev_err(dvi->dev, "Missing encoder\n"); 127dc55ac3bSJyri Sarha return -ENODEV; 128dc55ac3bSJyri Sarha } 129dc55ac3bSJyri Sarha 1303d31e215SPeter Ujfalusi if (dvi->hpd_irq >= 0) 131f56c9202SChristopher Spinrath dvi->connector.polled = DRM_CONNECTOR_POLL_HPD; 1323d31e215SPeter Ujfalusi else 1333d31e215SPeter Ujfalusi dvi->connector.polled = DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT; 134f56c9202SChristopher Spinrath 135dc55ac3bSJyri Sarha drm_connector_helper_add(&dvi->connector, 136dc55ac3bSJyri Sarha &tfp410_con_helper_funcs); 137cfb44455SAndrzej Pietrasiewicz ret = drm_connector_init_with_ddc(bridge->dev, &dvi->connector, 138cfb44455SAndrzej Pietrasiewicz &tfp410_con_funcs, 139cfb44455SAndrzej Pietrasiewicz dvi->connector_type, 140cfb44455SAndrzej Pietrasiewicz dvi->ddc); 141dc55ac3bSJyri Sarha if (ret) { 142dc55ac3bSJyri Sarha dev_err(dvi->dev, "drm_connector_init() failed: %d\n", ret); 143dc55ac3bSJyri Sarha return ret; 144dc55ac3bSJyri Sarha } 145dc55ac3bSJyri Sarha 1460eb2766dSPeter Ujfalusi drm_display_info_set_bus_formats(&dvi->connector.display_info, 1470eb2766dSPeter Ujfalusi &dvi->bus_format, 1); 1480eb2766dSPeter Ujfalusi 149cde4c44dSDaniel Vetter drm_connector_attach_encoder(&dvi->connector, 150dc55ac3bSJyri Sarha bridge->encoder); 151dc55ac3bSJyri Sarha 152dc55ac3bSJyri Sarha return 0; 153dc55ac3bSJyri Sarha } 154dc55ac3bSJyri Sarha 15538c02db7SLaurent Pinchart static void tfp410_enable(struct drm_bridge *bridge) 15638c02db7SLaurent Pinchart { 15738c02db7SLaurent Pinchart struct tfp410 *dvi = drm_bridge_to_tfp410(bridge); 15838c02db7SLaurent Pinchart 15938c02db7SLaurent Pinchart gpiod_set_value_cansleep(dvi->powerdown, 0); 16038c02db7SLaurent Pinchart } 16138c02db7SLaurent Pinchart 16238c02db7SLaurent Pinchart static void tfp410_disable(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, 1); 16738c02db7SLaurent Pinchart } 16838c02db7SLaurent Pinchart 169dc55ac3bSJyri Sarha static const struct drm_bridge_funcs tfp410_bridge_funcs = { 170dc55ac3bSJyri Sarha .attach = tfp410_attach, 17138c02db7SLaurent Pinchart .enable = tfp410_enable, 17238c02db7SLaurent Pinchart .disable = tfp410_disable, 173dc55ac3bSJyri Sarha }; 174dc55ac3bSJyri Sarha 175f56c9202SChristopher Spinrath static void tfp410_hpd_work_func(struct work_struct *work) 176f56c9202SChristopher Spinrath { 177f56c9202SChristopher Spinrath struct tfp410 *dvi; 178f56c9202SChristopher Spinrath 179f56c9202SChristopher Spinrath dvi = container_of(work, struct tfp410, hpd_work.work); 180f56c9202SChristopher Spinrath 181f56c9202SChristopher Spinrath if (dvi->bridge.dev) 182f56c9202SChristopher Spinrath drm_helper_hpd_irq_event(dvi->bridge.dev); 183f56c9202SChristopher Spinrath } 184f56c9202SChristopher Spinrath 185f56c9202SChristopher Spinrath static irqreturn_t tfp410_hpd_irq_thread(int irq, void *arg) 186f56c9202SChristopher Spinrath { 187f56c9202SChristopher Spinrath struct tfp410 *dvi = arg; 188f56c9202SChristopher Spinrath 189f56c9202SChristopher Spinrath mod_delayed_work(system_wq, &dvi->hpd_work, 190f56c9202SChristopher Spinrath msecs_to_jiffies(HOTPLUG_DEBOUNCE_MS)); 191f56c9202SChristopher Spinrath 192f56c9202SChristopher Spinrath return IRQ_HANDLED; 193f56c9202SChristopher Spinrath } 194f56c9202SChristopher Spinrath 195897dae56SLaurent Pinchart static const struct drm_bridge_timings tfp410_default_timings = { 196897dae56SLaurent Pinchart .input_bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE 197897dae56SLaurent Pinchart | DRM_BUS_FLAG_DE_HIGH, 198897dae56SLaurent Pinchart .setup_time_ps = 1200, 199897dae56SLaurent Pinchart .hold_time_ps = 1300, 200897dae56SLaurent Pinchart }; 201897dae56SLaurent Pinchart 202897dae56SLaurent Pinchart static int tfp410_parse_timings(struct tfp410 *dvi, bool i2c) 203897dae56SLaurent Pinchart { 204897dae56SLaurent Pinchart struct drm_bridge_timings *timings = &dvi->timings; 205897dae56SLaurent Pinchart struct device_node *ep; 206897dae56SLaurent Pinchart u32 pclk_sample = 0; 2070eb2766dSPeter Ujfalusi u32 bus_width = 24; 208897dae56SLaurent Pinchart s32 deskew = 0; 209897dae56SLaurent Pinchart 210897dae56SLaurent Pinchart /* Start with defaults. */ 211897dae56SLaurent Pinchart *timings = tfp410_default_timings; 212897dae56SLaurent Pinchart 213897dae56SLaurent Pinchart if (i2c) 214897dae56SLaurent Pinchart /* 215897dae56SLaurent Pinchart * In I2C mode timings are configured through the I2C interface. 216897dae56SLaurent Pinchart * As the driver doesn't support I2C configuration yet, we just 217897dae56SLaurent Pinchart * go with the defaults (BSEL=1, DSEL=1, DKEN=0, EDGE=1). 218897dae56SLaurent Pinchart */ 219897dae56SLaurent Pinchart return 0; 220897dae56SLaurent Pinchart 221897dae56SLaurent Pinchart /* 222897dae56SLaurent Pinchart * In non-I2C mode, timings are configured through the BSEL, DSEL, DKEN 223897dae56SLaurent Pinchart * and EDGE pins. They are specified in DT through endpoint properties 224897dae56SLaurent Pinchart * and vendor-specific properties. 225897dae56SLaurent Pinchart */ 226897dae56SLaurent Pinchart ep = of_graph_get_endpoint_by_regs(dvi->dev->of_node, 0, 0); 227897dae56SLaurent Pinchart if (!ep) 228897dae56SLaurent Pinchart return -EINVAL; 229897dae56SLaurent Pinchart 230897dae56SLaurent Pinchart /* Get the sampling edge from the endpoint. */ 231897dae56SLaurent Pinchart of_property_read_u32(ep, "pclk-sample", &pclk_sample); 2320eb2766dSPeter Ujfalusi of_property_read_u32(ep, "bus-width", &bus_width); 233897dae56SLaurent Pinchart of_node_put(ep); 234897dae56SLaurent Pinchart 235897dae56SLaurent Pinchart timings->input_bus_flags = DRM_BUS_FLAG_DE_HIGH; 236897dae56SLaurent Pinchart 237897dae56SLaurent Pinchart switch (pclk_sample) { 238897dae56SLaurent Pinchart case 0: 239897dae56SLaurent Pinchart timings->input_bus_flags |= DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE 240897dae56SLaurent Pinchart | DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE; 241897dae56SLaurent Pinchart break; 242897dae56SLaurent Pinchart case 1: 243897dae56SLaurent Pinchart timings->input_bus_flags |= DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE 244897dae56SLaurent Pinchart | DRM_BUS_FLAG_SYNC_SAMPLE_POSEDGE; 245897dae56SLaurent Pinchart break; 246897dae56SLaurent Pinchart default: 247897dae56SLaurent Pinchart return -EINVAL; 248897dae56SLaurent Pinchart } 249897dae56SLaurent Pinchart 2500eb2766dSPeter Ujfalusi switch (bus_width) { 2510eb2766dSPeter Ujfalusi case 12: 2520eb2766dSPeter Ujfalusi dvi->bus_format = MEDIA_BUS_FMT_RGB888_2X12_LE; 2530eb2766dSPeter Ujfalusi break; 2540eb2766dSPeter Ujfalusi case 24: 2550eb2766dSPeter Ujfalusi dvi->bus_format = MEDIA_BUS_FMT_RGB888_1X24; 2560eb2766dSPeter Ujfalusi break; 2570eb2766dSPeter Ujfalusi default: 2580eb2766dSPeter Ujfalusi return -EINVAL; 2590eb2766dSPeter Ujfalusi } 2600eb2766dSPeter Ujfalusi 261897dae56SLaurent Pinchart /* Get the setup and hold time from vendor-specific properties. */ 262897dae56SLaurent Pinchart of_property_read_u32(dvi->dev->of_node, "ti,deskew", (u32 *)&deskew); 263897dae56SLaurent Pinchart if (deskew < -4 || deskew > 3) 264897dae56SLaurent Pinchart return -EINVAL; 265897dae56SLaurent Pinchart 266897dae56SLaurent Pinchart timings->setup_time_ps = min(0, 1200 - 350 * deskew); 267897dae56SLaurent Pinchart timings->hold_time_ps = min(0, 1300 + 350 * deskew); 268897dae56SLaurent Pinchart 269897dae56SLaurent Pinchart return 0; 270897dae56SLaurent Pinchart } 271897dae56SLaurent Pinchart 272f56c9202SChristopher Spinrath static int tfp410_get_connector_properties(struct tfp410 *dvi) 273dc55ac3bSJyri Sarha { 27486418f90SRob Herring struct device_node *connector_node, *ddc_phandle; 275dc55ac3bSJyri Sarha int ret = 0; 276dc55ac3bSJyri Sarha 277dc55ac3bSJyri Sarha /* port@1 is the connector node */ 27886418f90SRob Herring connector_node = of_graph_get_remote_node(dvi->dev->of_node, 1, -1); 279dc55ac3bSJyri Sarha if (!connector_node) 28086418f90SRob Herring return -ENODEV; 281dc55ac3bSJyri Sarha 28260b903c3SLaurent Pinchart if (of_device_is_compatible(connector_node, "hdmi-connector")) 28360b903c3SLaurent Pinchart dvi->connector_type = DRM_MODE_CONNECTOR_HDMIA; 28460b903c3SLaurent Pinchart else 28560b903c3SLaurent Pinchart dvi->connector_type = DRM_MODE_CONNECTOR_DVID; 28660b903c3SLaurent Pinchart 287f56c9202SChristopher Spinrath dvi->hpd = fwnode_get_named_gpiod(&connector_node->fwnode, 288f56c9202SChristopher Spinrath "hpd-gpios", 0, GPIOD_IN, "hpd"); 289f56c9202SChristopher Spinrath if (IS_ERR(dvi->hpd)) { 290f56c9202SChristopher Spinrath ret = PTR_ERR(dvi->hpd); 291f56c9202SChristopher Spinrath dvi->hpd = NULL; 292f56c9202SChristopher Spinrath if (ret == -ENOENT) 293f56c9202SChristopher Spinrath ret = 0; 294f56c9202SChristopher Spinrath else 295f56c9202SChristopher Spinrath goto fail; 296f56c9202SChristopher Spinrath } 297f56c9202SChristopher Spinrath 298dc55ac3bSJyri Sarha ddc_phandle = of_parse_phandle(connector_node, "ddc-i2c-bus", 0); 299dc55ac3bSJyri Sarha if (!ddc_phandle) 300dc55ac3bSJyri Sarha goto fail; 301dc55ac3bSJyri Sarha 302dc55ac3bSJyri Sarha dvi->ddc = of_get_i2c_adapter_by_node(ddc_phandle); 303dc55ac3bSJyri Sarha if (dvi->ddc) 304dc55ac3bSJyri Sarha dev_info(dvi->dev, "Connector's ddc i2c bus found\n"); 305dc55ac3bSJyri Sarha else 306dc55ac3bSJyri Sarha ret = -EPROBE_DEFER; 307dc55ac3bSJyri Sarha 308dc55ac3bSJyri Sarha of_node_put(ddc_phandle); 30986418f90SRob Herring 31086418f90SRob Herring fail: 31186418f90SRob Herring of_node_put(connector_node); 312dc55ac3bSJyri Sarha return ret; 313dc55ac3bSJyri Sarha } 314dc55ac3bSJyri Sarha 315897dae56SLaurent Pinchart static int tfp410_init(struct device *dev, bool i2c) 316dc55ac3bSJyri Sarha { 317dc55ac3bSJyri Sarha struct tfp410 *dvi; 318dc55ac3bSJyri Sarha int ret; 319dc55ac3bSJyri Sarha 320dc55ac3bSJyri Sarha if (!dev->of_node) { 321dc55ac3bSJyri Sarha dev_err(dev, "device-tree data is missing\n"); 322dc55ac3bSJyri Sarha return -ENXIO; 323dc55ac3bSJyri Sarha } 324dc55ac3bSJyri Sarha 325dc55ac3bSJyri Sarha dvi = devm_kzalloc(dev, sizeof(*dvi), GFP_KERNEL); 326dc55ac3bSJyri Sarha if (!dvi) 327dc55ac3bSJyri Sarha return -ENOMEM; 328dc55ac3bSJyri Sarha dev_set_drvdata(dev, dvi); 329dc55ac3bSJyri Sarha 330dc55ac3bSJyri Sarha dvi->bridge.funcs = &tfp410_bridge_funcs; 331dc55ac3bSJyri Sarha dvi->bridge.of_node = dev->of_node; 332897dae56SLaurent Pinchart dvi->bridge.timings = &dvi->timings; 333dc55ac3bSJyri Sarha dvi->dev = dev; 334dc55ac3bSJyri Sarha 335897dae56SLaurent Pinchart ret = tfp410_parse_timings(dvi, i2c); 336897dae56SLaurent Pinchart if (ret) 337897dae56SLaurent Pinchart goto fail; 338897dae56SLaurent Pinchart 339f56c9202SChristopher Spinrath ret = tfp410_get_connector_properties(dvi); 340dc55ac3bSJyri Sarha if (ret) 341dc55ac3bSJyri Sarha goto fail; 342dc55ac3bSJyri Sarha 34338c02db7SLaurent Pinchart dvi->powerdown = devm_gpiod_get_optional(dev, "powerdown", 34438c02db7SLaurent Pinchart GPIOD_OUT_HIGH); 34538c02db7SLaurent Pinchart if (IS_ERR(dvi->powerdown)) { 34638c02db7SLaurent Pinchart dev_err(dev, "failed to parse powerdown gpio\n"); 34738c02db7SLaurent Pinchart return PTR_ERR(dvi->powerdown); 34838c02db7SLaurent Pinchart } 34938c02db7SLaurent Pinchart 3503d31e215SPeter Ujfalusi if (dvi->hpd) 3513d31e215SPeter Ujfalusi dvi->hpd_irq = gpiod_to_irq(dvi->hpd); 3523d31e215SPeter Ujfalusi else 3533d31e215SPeter Ujfalusi dvi->hpd_irq = -ENXIO; 3543d31e215SPeter Ujfalusi 3553d31e215SPeter Ujfalusi if (dvi->hpd_irq >= 0) { 356f56c9202SChristopher Spinrath INIT_DELAYED_WORK(&dvi->hpd_work, tfp410_hpd_work_func); 357f56c9202SChristopher Spinrath 3583d31e215SPeter Ujfalusi ret = devm_request_threaded_irq(dev, dvi->hpd_irq, 359f56c9202SChristopher Spinrath NULL, tfp410_hpd_irq_thread, IRQF_TRIGGER_RISING | 360f56c9202SChristopher Spinrath IRQF_TRIGGER_FALLING | IRQF_ONESHOT, 361f56c9202SChristopher Spinrath "hdmi-hpd", dvi); 362f56c9202SChristopher Spinrath if (ret) { 363f56c9202SChristopher Spinrath DRM_ERROR("failed to register hpd interrupt\n"); 364f56c9202SChristopher Spinrath goto fail; 365f56c9202SChristopher Spinrath } 366f56c9202SChristopher Spinrath } 367f56c9202SChristopher Spinrath 368f74c5275SInki Dae drm_bridge_add(&dvi->bridge); 369dc55ac3bSJyri Sarha 370dc55ac3bSJyri Sarha return 0; 371dc55ac3bSJyri Sarha fail: 372dc55ac3bSJyri Sarha i2c_put_adapter(dvi->ddc); 373f56c9202SChristopher Spinrath if (dvi->hpd) 374f56c9202SChristopher Spinrath gpiod_put(dvi->hpd); 375dc55ac3bSJyri Sarha return ret; 376dc55ac3bSJyri Sarha } 377dc55ac3bSJyri Sarha 378dc55ac3bSJyri Sarha static int tfp410_fini(struct device *dev) 379dc55ac3bSJyri Sarha { 380dc55ac3bSJyri Sarha struct tfp410 *dvi = dev_get_drvdata(dev); 381dc55ac3bSJyri Sarha 382b1622cb3STomi Valkeinen if (dvi->hpd_irq >= 0) 383f56c9202SChristopher Spinrath cancel_delayed_work_sync(&dvi->hpd_work); 384f56c9202SChristopher Spinrath 385dc55ac3bSJyri Sarha drm_bridge_remove(&dvi->bridge); 386dc55ac3bSJyri Sarha 387dc55ac3bSJyri Sarha if (dvi->ddc) 388dc55ac3bSJyri Sarha i2c_put_adapter(dvi->ddc); 389f56c9202SChristopher Spinrath if (dvi->hpd) 390f56c9202SChristopher Spinrath gpiod_put(dvi->hpd); 391dc55ac3bSJyri Sarha 392dc55ac3bSJyri Sarha return 0; 393dc55ac3bSJyri Sarha } 394dc55ac3bSJyri Sarha 395dc55ac3bSJyri Sarha static int tfp410_probe(struct platform_device *pdev) 396dc55ac3bSJyri Sarha { 397897dae56SLaurent Pinchart return tfp410_init(&pdev->dev, false); 398dc55ac3bSJyri Sarha } 399dc55ac3bSJyri Sarha 400dc55ac3bSJyri Sarha static int tfp410_remove(struct platform_device *pdev) 401dc55ac3bSJyri Sarha { 402dc55ac3bSJyri Sarha return tfp410_fini(&pdev->dev); 403dc55ac3bSJyri Sarha } 404dc55ac3bSJyri Sarha 405dc55ac3bSJyri Sarha static const struct of_device_id tfp410_match[] = { 406dc55ac3bSJyri Sarha { .compatible = "ti,tfp410" }, 407dc55ac3bSJyri Sarha {}, 408dc55ac3bSJyri Sarha }; 409dc55ac3bSJyri Sarha MODULE_DEVICE_TABLE(of, tfp410_match); 410dc55ac3bSJyri Sarha 4115b47d089SWei Yongjun static struct platform_driver tfp410_platform_driver = { 412dc55ac3bSJyri Sarha .probe = tfp410_probe, 413dc55ac3bSJyri Sarha .remove = tfp410_remove, 414dc55ac3bSJyri Sarha .driver = { 415dc55ac3bSJyri Sarha .name = "tfp410-bridge", 416dc55ac3bSJyri Sarha .of_match_table = tfp410_match, 417dc55ac3bSJyri Sarha }, 418dc55ac3bSJyri Sarha }; 419dc55ac3bSJyri Sarha 420dc55ac3bSJyri Sarha #if IS_ENABLED(CONFIG_I2C) 421dc55ac3bSJyri Sarha /* There is currently no i2c functionality. */ 422dc55ac3bSJyri Sarha static int tfp410_i2c_probe(struct i2c_client *client, 423dc55ac3bSJyri Sarha const struct i2c_device_id *id) 424dc55ac3bSJyri Sarha { 425dc55ac3bSJyri Sarha int reg; 426dc55ac3bSJyri Sarha 427dc55ac3bSJyri Sarha if (!client->dev.of_node || 428dc55ac3bSJyri Sarha of_property_read_u32(client->dev.of_node, "reg", ®)) { 429dc55ac3bSJyri Sarha dev_err(&client->dev, 430dc55ac3bSJyri Sarha "Can't get i2c reg property from device-tree\n"); 431dc55ac3bSJyri Sarha return -ENXIO; 432dc55ac3bSJyri Sarha } 433dc55ac3bSJyri Sarha 434897dae56SLaurent Pinchart return tfp410_init(&client->dev, true); 435dc55ac3bSJyri Sarha } 436dc55ac3bSJyri Sarha 437dc55ac3bSJyri Sarha static int tfp410_i2c_remove(struct i2c_client *client) 438dc55ac3bSJyri Sarha { 439dc55ac3bSJyri Sarha return tfp410_fini(&client->dev); 440dc55ac3bSJyri Sarha } 441dc55ac3bSJyri Sarha 442dc55ac3bSJyri Sarha static const struct i2c_device_id tfp410_i2c_ids[] = { 443dc55ac3bSJyri Sarha { "tfp410", 0 }, 444dc55ac3bSJyri Sarha { } 445dc55ac3bSJyri Sarha }; 446dc55ac3bSJyri Sarha MODULE_DEVICE_TABLE(i2c, tfp410_i2c_ids); 447dc55ac3bSJyri Sarha 448dc55ac3bSJyri Sarha static struct i2c_driver tfp410_i2c_driver = { 449dc55ac3bSJyri Sarha .driver = { 450dc55ac3bSJyri Sarha .name = "tfp410", 451dc55ac3bSJyri Sarha .of_match_table = of_match_ptr(tfp410_match), 452dc55ac3bSJyri Sarha }, 453dc55ac3bSJyri Sarha .id_table = tfp410_i2c_ids, 454dc55ac3bSJyri Sarha .probe = tfp410_i2c_probe, 455dc55ac3bSJyri Sarha .remove = tfp410_i2c_remove, 456dc55ac3bSJyri Sarha }; 457dc55ac3bSJyri Sarha #endif /* IS_ENABLED(CONFIG_I2C) */ 458dc55ac3bSJyri Sarha 459dc55ac3bSJyri Sarha static struct { 460dc55ac3bSJyri Sarha uint i2c:1; 461dc55ac3bSJyri Sarha uint platform:1; 462dc55ac3bSJyri Sarha } tfp410_registered_driver; 463dc55ac3bSJyri Sarha 464dc55ac3bSJyri Sarha static int __init tfp410_module_init(void) 465dc55ac3bSJyri Sarha { 466dc55ac3bSJyri Sarha int ret; 467dc55ac3bSJyri Sarha 468dc55ac3bSJyri Sarha #if IS_ENABLED(CONFIG_I2C) 469dc55ac3bSJyri Sarha ret = i2c_add_driver(&tfp410_i2c_driver); 470dc55ac3bSJyri Sarha if (ret) 471dc55ac3bSJyri Sarha pr_err("%s: registering i2c driver failed: %d", 472dc55ac3bSJyri Sarha __func__, ret); 473dc55ac3bSJyri Sarha else 474dc55ac3bSJyri Sarha tfp410_registered_driver.i2c = 1; 475dc55ac3bSJyri Sarha #endif 476dc55ac3bSJyri Sarha 477dc55ac3bSJyri Sarha ret = platform_driver_register(&tfp410_platform_driver); 478dc55ac3bSJyri Sarha if (ret) 479dc55ac3bSJyri Sarha pr_err("%s: registering platform driver failed: %d", 480dc55ac3bSJyri Sarha __func__, ret); 481dc55ac3bSJyri Sarha else 482dc55ac3bSJyri Sarha tfp410_registered_driver.platform = 1; 483dc55ac3bSJyri Sarha 484dc55ac3bSJyri Sarha if (tfp410_registered_driver.i2c || 485dc55ac3bSJyri Sarha tfp410_registered_driver.platform) 486dc55ac3bSJyri Sarha return 0; 487dc55ac3bSJyri Sarha 488dc55ac3bSJyri Sarha return ret; 489dc55ac3bSJyri Sarha } 490dc55ac3bSJyri Sarha module_init(tfp410_module_init); 491dc55ac3bSJyri Sarha 492dc55ac3bSJyri Sarha static void __exit tfp410_module_exit(void) 493dc55ac3bSJyri Sarha { 494dc55ac3bSJyri Sarha #if IS_ENABLED(CONFIG_I2C) 495dc55ac3bSJyri Sarha if (tfp410_registered_driver.i2c) 496dc55ac3bSJyri Sarha i2c_del_driver(&tfp410_i2c_driver); 497dc55ac3bSJyri Sarha #endif 498dc55ac3bSJyri Sarha if (tfp410_registered_driver.platform) 499dc55ac3bSJyri Sarha platform_driver_unregister(&tfp410_platform_driver); 500dc55ac3bSJyri Sarha } 501dc55ac3bSJyri Sarha module_exit(tfp410_module_exit); 502dc55ac3bSJyri Sarha 503dc55ac3bSJyri Sarha MODULE_AUTHOR("Jyri Sarha <jsarha@ti.com>"); 504dc55ac3bSJyri Sarha MODULE_DESCRIPTION("TI TFP410 DVI bridge driver"); 505dc55ac3bSJyri Sarha MODULE_LICENSE("GPL"); 506