1 // SPDX-License-Identifier: GPL-2.0-only
7 #include <linux/gpio/consumer.h>
9 #include <linux/media-bus-format.h>
56 	if (dvi->next_bridge->ops & DRM_BRIDGE_OP_EDID) {  in tfp410_get_modes()
57 		drm_edid = drm_bridge_edid_read(dvi->next_bridge, connector);  in tfp410_get_modes()
92 	return drm_bridge_detect(dvi->next_bridge);  in tfp410_connector_detect()
110 	if (dvi->bridge.dev)  in tfp410_hpd_work_func()
111 		drm_helper_hpd_irq_event(dvi->bridge.dev);  in tfp410_hpd_work_func()
118 	mod_delayed_work(system_wq, &dvi->hpd_work,  in tfp410_hpd_callback()
128 	ret = drm_bridge_attach(bridge->encoder, dvi->next_bridge, bridge,  in tfp410_attach()
136 	if (dvi->next_bridge->ops & DRM_BRIDGE_OP_DETECT)  in tfp410_attach()
137 		dvi->connector.polled = DRM_CONNECTOR_POLL_HPD;  in tfp410_attach()
139 		dvi->connector.polled = DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT;  in tfp410_attach()
141 	if (dvi->next_bridge->ops & DRM_BRIDGE_OP_HPD) {  in tfp410_attach()
142 		INIT_DELAYED_WORK(&dvi->hpd_work, tfp410_hpd_work_func);  in tfp410_attach()
143 		drm_bridge_hpd_enable(dvi->next_bridge, tfp410_hpd_callback,  in tfp410_attach()
147 	drm_connector_helper_add(&dvi->connector,  in tfp410_attach()
149 	ret = drm_connector_init_with_ddc(bridge->dev, &dvi->connector,  in tfp410_attach()
151 					  dvi->next_bridge->type,  in tfp410_attach()
152 					  dvi->next_bridge->ddc);  in tfp410_attach()
154 		dev_err(dvi->dev, "drm_connector_init_with_ddc() failed: %d\n",  in tfp410_attach()
159 	drm_display_info_set_bus_formats(&dvi->connector.display_info,  in tfp410_attach()
160 					 &dvi->bus_format, 1);  in tfp410_attach()
162 	drm_connector_attach_encoder(&dvi->connector, bridge->encoder);  in tfp410_attach()
171 	if (dvi->connector.dev && dvi->next_bridge->ops & DRM_BRIDGE_OP_HPD) {  in tfp410_detach()
172 		drm_bridge_hpd_disable(dvi->next_bridge);  in tfp410_detach()
173 		cancel_delayed_work_sync(&dvi->hpd_work);  in tfp410_detach()
181 	gpiod_set_value_cansleep(dvi->powerdown, 0);  in tfp410_enable()
188 	gpiod_set_value_cansleep(dvi->powerdown, 1);  in tfp410_disable()
195 	if (mode->clock < 25000)  in tfp410_mode_valid()
198 	if (mode->clock > 165000)  in tfp410_mode_valid()
221 	input_fmts[0] = dvi->bus_format;  in tfp410_get_input_bus_fmts()
237 	bridge_state->input_bus_cfg.flags = dvi->timings.input_bus_flags;  in tfp410_atomic_check()
264 	struct drm_bridge_timings *timings = &dvi->timings;  in tfp410_parse_timings()
270 	/* Start with defaults. */  in tfp410_parse_timings()
277 		 * go with the defaults (BSEL=1, DSEL=1, DKEN=0, EDGE=1).  in tfp410_parse_timings()
282 	 * In non-I2C mode, timings are configured through the BSEL, DSEL, DKEN  in tfp410_parse_timings()
284 	 * and vendor-specific properties.  in tfp410_parse_timings()
286 	ep = of_graph_get_endpoint_by_regs(dvi->dev->of_node, 0, 0);  in tfp410_parse_timings()
288 		return -EINVAL;  in tfp410_parse_timings()
291 	of_property_read_u32(ep, "pclk-sample", &pclk_sample);  in tfp410_parse_timings()
292 	of_property_read_u32(ep, "bus-width", &bus_width);  in tfp410_parse_timings()
295 	timings->input_bus_flags = DRM_BUS_FLAG_DE_HIGH;  in tfp410_parse_timings()
299 		timings->input_bus_flags |= DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE  in tfp410_parse_timings()
303 		timings->input_bus_flags |= DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE  in tfp410_parse_timings()
307 		return -EINVAL;  in tfp410_parse_timings()
312 		dvi->bus_format = MEDIA_BUS_FMT_RGB888_2X12_LE;  in tfp410_parse_timings()
315 		dvi->bus_format = MEDIA_BUS_FMT_RGB888_1X24;  in tfp410_parse_timings()
318 		return -EINVAL;  in tfp410_parse_timings()
321 	/* Get the setup and hold time from vendor-specific properties. */  in tfp410_parse_timings()
322 	of_property_read_u32(dvi->dev->of_node, "ti,deskew", &deskew);  in tfp410_parse_timings()
324 		return -EINVAL;  in tfp410_parse_timings()
326 	timings->setup_time_ps = 1200 - 350 * ((s32)deskew - 4);  in tfp410_parse_timings()
327 	timings->hold_time_ps = max(0, 1300 + 350 * ((s32)deskew - 4));  in tfp410_parse_timings()
338 	if (!dev->of_node) {  in tfp410_init()
339 		dev_err(dev, "device-tree data is missing\n");  in tfp410_init()
340 		return -ENXIO;  in tfp410_init()
345 		return -ENOMEM;  in tfp410_init()
347 	dvi->dev = dev;  in tfp410_init()
350 	dvi->bridge.funcs = &tfp410_bridge_funcs;  in tfp410_init()
351 	dvi->bridge.of_node = dev->of_node;  in tfp410_init()
352 	dvi->bridge.timings = &dvi->timings;  in tfp410_init()
353 	dvi->bridge.type = DRM_MODE_CONNECTOR_DVID;  in tfp410_init()
360 	node = of_graph_get_remote_node(dev->of_node, 1, -1);  in tfp410_init()
362 		return -ENODEV;  in tfp410_init()
364 	dvi->next_bridge = of_drm_find_bridge(node);  in tfp410_init()
367 	if (!dvi->next_bridge)  in tfp410_init()
368 		return -EPROBE_DEFER;  in tfp410_init()
370 	/* Get the powerdown GPIO. */  in tfp410_init()
371 	dvi->powerdown = devm_gpiod_get_optional(dev, "powerdown",  in tfp410_init()
373 	if (IS_ERR(dvi->powerdown)) {  in tfp410_init()
374 		dev_err(dev, "failed to parse powerdown gpio\n");  in tfp410_init()
375 		return PTR_ERR(dvi->powerdown);  in tfp410_init()
379 	drm_bridge_add(&dvi->bridge);  in tfp410_init()
388 	drm_bridge_remove(&dvi->bridge);  in tfp410_fini()
393 	return tfp410_init(&pdev->dev, false);  in tfp410_probe()
398 	tfp410_fini(&pdev->dev);  in tfp410_remove()
411 		.name		= "tfp410-bridge",
422 	if (!client->dev.of_node ||  in tfp410_i2c_probe()
423 	    of_property_read_u32(client->dev.of_node, "reg", &reg)) {  in tfp410_i2c_probe()
424 		dev_err(&client->dev,  in tfp410_i2c_probe()
425 			"Can't get i2c reg property from device-tree\n");  in tfp410_i2c_probe()
426 		return -ENXIO;  in tfp410_i2c_probe()
429 	return tfp410_init(&client->dev, true);  in tfp410_i2c_probe()
434 	tfp410_fini(&client->dev);  in tfp410_i2c_remove()