Lines Matching +full:ddc +full:- +full:i2c +full:- +full:bus
1 // SPDX-License-Identifier: GPL-2.0-only
10 #include <linux/i2c.h>
29 struct i2c_adapter *ddc; member
58 if (!dvi->ddc) in tfp410_get_modes()
61 edid = drm_get_edid(connector, dvi->ddc); in tfp410_get_modes()
94 if (dvi->hpd) { in tfp410_connector_detect()
95 if (gpiod_get_value_cansleep(dvi->hpd)) in tfp410_connector_detect()
101 if (dvi->ddc) { in tfp410_connector_detect()
102 if (drm_probe_ddc(dvi->ddc)) in tfp410_connector_detect()
125 if (!bridge->encoder) { in tfp410_attach()
126 dev_err(dvi->dev, "Missing encoder\n"); in tfp410_attach()
127 return -ENODEV; in tfp410_attach()
130 if (dvi->hpd_irq >= 0) in tfp410_attach()
131 dvi->connector.polled = DRM_CONNECTOR_POLL_HPD; in tfp410_attach()
133 dvi->connector.polled = DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT; in tfp410_attach()
135 drm_connector_helper_add(&dvi->connector, in tfp410_attach()
137 ret = drm_connector_init_with_ddc(bridge->dev, &dvi->connector, in tfp410_attach()
139 dvi->connector_type, in tfp410_attach()
140 dvi->ddc); in tfp410_attach()
142 dev_err(dvi->dev, "drm_connector_init() failed: %d\n", ret); in tfp410_attach()
146 drm_display_info_set_bus_formats(&dvi->connector.display_info, in tfp410_attach()
147 &dvi->bus_format, 1); in tfp410_attach()
149 drm_connector_attach_encoder(&dvi->connector, in tfp410_attach()
150 bridge->encoder); in tfp410_attach()
159 gpiod_set_value_cansleep(dvi->powerdown, 0); in tfp410_enable()
166 gpiod_set_value_cansleep(dvi->powerdown, 1); in tfp410_disable()
181 if (dvi->bridge.dev) in tfp410_hpd_work_func()
182 drm_helper_hpd_irq_event(dvi->bridge.dev); in tfp410_hpd_work_func()
189 mod_delayed_work(system_wq, &dvi->hpd_work, in tfp410_hpd_irq_thread()
202 static int tfp410_parse_timings(struct tfp410 *dvi, bool i2c) in tfp410_parse_timings() argument
204 struct drm_bridge_timings *timings = &dvi->timings; in tfp410_parse_timings()
213 if (i2c) in tfp410_parse_timings()
215 * In I2C mode timings are configured through the I2C interface. in tfp410_parse_timings()
216 * As the driver doesn't support I2C configuration yet, we just in tfp410_parse_timings()
222 * In non-I2C mode, timings are configured through the BSEL, DSEL, DKEN in tfp410_parse_timings()
224 * and vendor-specific properties. in tfp410_parse_timings()
226 ep = of_graph_get_endpoint_by_regs(dvi->dev->of_node, 0, 0); in tfp410_parse_timings()
228 return -EINVAL; in tfp410_parse_timings()
231 of_property_read_u32(ep, "pclk-sample", &pclk_sample); in tfp410_parse_timings()
232 of_property_read_u32(ep, "bus-width", &bus_width); in tfp410_parse_timings()
235 timings->input_bus_flags = DRM_BUS_FLAG_DE_HIGH; in tfp410_parse_timings()
239 timings->input_bus_flags |= DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE in tfp410_parse_timings()
243 timings->input_bus_flags |= DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE in tfp410_parse_timings()
247 return -EINVAL; in tfp410_parse_timings()
252 dvi->bus_format = MEDIA_BUS_FMT_RGB888_2X12_LE; in tfp410_parse_timings()
255 dvi->bus_format = MEDIA_BUS_FMT_RGB888_1X24; in tfp410_parse_timings()
258 return -EINVAL; in tfp410_parse_timings()
261 /* Get the setup and hold time from vendor-specific properties. */ in tfp410_parse_timings()
262 of_property_read_u32(dvi->dev->of_node, "ti,deskew", (u32 *)&deskew); in tfp410_parse_timings()
263 if (deskew < -4 || deskew > 3) in tfp410_parse_timings()
264 return -EINVAL; in tfp410_parse_timings()
266 timings->setup_time_ps = min(0, 1200 - 350 * deskew); in tfp410_parse_timings()
267 timings->hold_time_ps = min(0, 1300 + 350 * deskew); in tfp410_parse_timings()
278 connector_node = of_graph_get_remote_node(dvi->dev->of_node, 1, -1); in tfp410_get_connector_properties()
280 return -ENODEV; in tfp410_get_connector_properties()
282 if (of_device_is_compatible(connector_node, "hdmi-connector")) in tfp410_get_connector_properties()
283 dvi->connector_type = DRM_MODE_CONNECTOR_HDMIA; in tfp410_get_connector_properties()
285 dvi->connector_type = DRM_MODE_CONNECTOR_DVID; in tfp410_get_connector_properties()
287 dvi->hpd = fwnode_get_named_gpiod(&connector_node->fwnode, in tfp410_get_connector_properties()
288 "hpd-gpios", 0, GPIOD_IN, "hpd"); in tfp410_get_connector_properties()
289 if (IS_ERR(dvi->hpd)) { in tfp410_get_connector_properties()
290 ret = PTR_ERR(dvi->hpd); in tfp410_get_connector_properties()
291 dvi->hpd = NULL; in tfp410_get_connector_properties()
292 if (ret == -ENOENT) in tfp410_get_connector_properties()
298 ddc_phandle = of_parse_phandle(connector_node, "ddc-i2c-bus", 0); in tfp410_get_connector_properties()
302 dvi->ddc = of_get_i2c_adapter_by_node(ddc_phandle); in tfp410_get_connector_properties()
303 if (dvi->ddc) in tfp410_get_connector_properties()
304 dev_info(dvi->dev, "Connector's ddc i2c bus found\n"); in tfp410_get_connector_properties()
306 ret = -EPROBE_DEFER; in tfp410_get_connector_properties()
315 static int tfp410_init(struct device *dev, bool i2c) in tfp410_init() argument
320 if (!dev->of_node) { in tfp410_init()
321 dev_err(dev, "device-tree data is missing\n"); in tfp410_init()
322 return -ENXIO; in tfp410_init()
327 return -ENOMEM; in tfp410_init()
330 dvi->bridge.funcs = &tfp410_bridge_funcs; in tfp410_init()
331 dvi->bridge.of_node = dev->of_node; in tfp410_init()
332 dvi->bridge.timings = &dvi->timings; in tfp410_init()
333 dvi->dev = dev; in tfp410_init()
335 ret = tfp410_parse_timings(dvi, i2c); in tfp410_init()
343 dvi->powerdown = devm_gpiod_get_optional(dev, "powerdown", in tfp410_init()
345 if (IS_ERR(dvi->powerdown)) { in tfp410_init()
347 return PTR_ERR(dvi->powerdown); in tfp410_init()
350 if (dvi->hpd) in tfp410_init()
351 dvi->hpd_irq = gpiod_to_irq(dvi->hpd); in tfp410_init()
353 dvi->hpd_irq = -ENXIO; in tfp410_init()
355 if (dvi->hpd_irq >= 0) { in tfp410_init()
356 INIT_DELAYED_WORK(&dvi->hpd_work, tfp410_hpd_work_func); in tfp410_init()
358 ret = devm_request_threaded_irq(dev, dvi->hpd_irq, in tfp410_init()
361 "hdmi-hpd", dvi); in tfp410_init()
368 drm_bridge_add(&dvi->bridge); in tfp410_init()
372 i2c_put_adapter(dvi->ddc); in tfp410_init()
373 if (dvi->hpd) in tfp410_init()
374 gpiod_put(dvi->hpd); in tfp410_init()
382 if (dvi->hpd_irq >= 0) in tfp410_fini()
383 cancel_delayed_work_sync(&dvi->hpd_work); in tfp410_fini()
385 drm_bridge_remove(&dvi->bridge); in tfp410_fini()
387 if (dvi->ddc) in tfp410_fini()
388 i2c_put_adapter(dvi->ddc); in tfp410_fini()
389 if (dvi->hpd) in tfp410_fini()
390 gpiod_put(dvi->hpd); in tfp410_fini()
397 return tfp410_init(&pdev->dev, false); in tfp410_probe()
402 return tfp410_fini(&pdev->dev); in tfp410_remove()
415 .name = "tfp410-bridge",
421 /* There is currently no i2c functionality. */
427 if (!client->dev.of_node || in tfp410_i2c_probe()
428 of_property_read_u32(client->dev.of_node, "reg", ®)) { in tfp410_i2c_probe()
429 dev_err(&client->dev, in tfp410_i2c_probe()
430 "Can't get i2c reg property from device-tree\n"); in tfp410_i2c_probe()
431 return -ENXIO; in tfp410_i2c_probe()
434 return tfp410_init(&client->dev, true); in tfp410_i2c_probe()
439 return tfp410_fini(&client->dev); in tfp410_i2c_remove()
446 MODULE_DEVICE_TABLE(i2c, tfp410_i2c_ids);
460 uint i2c:1; member
471 pr_err("%s: registering i2c driver failed: %d", in tfp410_module_init()
474 tfp410_registered_driver.i2c = 1; in tfp410_module_init()
484 if (tfp410_registered_driver.i2c || in tfp410_module_init()
495 if (tfp410_registered_driver.i2c) in tfp410_module_exit()