1 // SPDX-License-Identifier: GPL-2.0-only
56 	ret = i2c_master_send(ptn_bridge->client, &addr, 1);  in ptn3460_read_bytes()
62 	ret = i2c_master_recv(ptn_bridge->client, buf, len);  in ptn3460_read_bytes()
80 	ret = i2c_master_send(ptn_bridge->client, buf, ARRAY_SIZE(buf));  in ptn3460_write_byte()
94 	/* Load the selected edid into SRAM (accessed at PTN3460_EDID_ADDR) */  in ptn3460_select_edid()
96 			ptn_bridge->edid_emulation);  in ptn3460_select_edid()
98 		DRM_ERROR("Failed to transfer EDID to sram, ret=%d\n", ret);  in ptn3460_select_edid()
102 	/* Enable EDID emulation and select the desired EDID */  in ptn3460_select_edid()
104 		ptn_bridge->edid_emulation << PTN3460_EDID_EMULATION_SELECTION;  in ptn3460_select_edid()
108 		DRM_ERROR("Failed to write EDID value, ret=%d\n", ret);  in ptn3460_select_edid()
120 	if (ptn_bridge->enabled)  in ptn3460_pre_enable()
123 	gpiod_set_value(ptn_bridge->gpio_pd_n, 1);  in ptn3460_pre_enable()
125 	gpiod_set_value(ptn_bridge->gpio_rst_n, 0);  in ptn3460_pre_enable()
127 	gpiod_set_value(ptn_bridge->gpio_rst_n, 1);  in ptn3460_pre_enable()
138 		DRM_ERROR("Select EDID failed ret=%d\n", ret);  in ptn3460_pre_enable()
140 	ptn_bridge->enabled = true;  in ptn3460_pre_enable()
147 	if (!ptn_bridge->enabled)  in ptn3460_disable()
150 	ptn_bridge->enabled = false;  in ptn3460_disable()
152 	gpiod_set_value(ptn_bridge->gpio_rst_n, 1);  in ptn3460_disable()
153 	gpiod_set_value(ptn_bridge->gpio_pd_n, 0);  in ptn3460_disable()
157 static struct edid *ptn3460_get_edid(struct drm_bridge *bridge,  in ptn3460_get_edid()
162 	u8 *edid;  in ptn3460_get_edid()  local
165 	power_off = !ptn_bridge->enabled;  in ptn3460_get_edid()
166 	ptn3460_pre_enable(&ptn_bridge->bridge);  in ptn3460_get_edid()
168 	edid = kmalloc(EDID_LENGTH, GFP_KERNEL);  in ptn3460_get_edid()
169 	if (!edid) {  in ptn3460_get_edid()
170 		DRM_ERROR("Failed to allocate EDID\n");  in ptn3460_get_edid()
174 	ret = ptn3460_read_bytes(ptn_bridge, PTN3460_EDID_ADDR, edid,  in ptn3460_get_edid()
177 		kfree(edid);  in ptn3460_get_edid()
178 		edid = NULL;  in ptn3460_get_edid()
184 		ptn3460_disable(&ptn_bridge->bridge);  in ptn3460_get_edid()
186 	return (struct edid *)edid;  in ptn3460_get_edid()
192 	struct edid *edid;  in ptn3460_connector_get_modes()  local
195 	edid = ptn3460_get_edid(&ptn_bridge->bridge, connector);  in ptn3460_connector_get_modes()
196 	drm_connector_update_edid_property(connector, edid);  in ptn3460_connector_get_modes()
197 	num_modes = drm_add_edid_modes(connector, edid);  in ptn3460_connector_get_modes()
198 	kfree(edid);  in ptn3460_connector_get_modes()
222 	ret = drm_bridge_attach(bridge->encoder, ptn_bridge->panel_bridge,  in ptn3460_bridge_attach()
230 	if (!bridge->encoder) {  in ptn3460_bridge_attach()
232 		return -ENODEV;  in ptn3460_bridge_attach()
235 	ptn_bridge->connector.polled = DRM_CONNECTOR_POLL_HPD;  in ptn3460_bridge_attach()
236 	ret = drm_connector_init(bridge->dev, &ptn_bridge->connector,  in ptn3460_bridge_attach()
242 	drm_connector_helper_add(&ptn_bridge->connector,  in ptn3460_bridge_attach()
244 	drm_connector_register(&ptn_bridge->connector);  in ptn3460_bridge_attach()
245 	drm_connector_attach_encoder(&ptn_bridge->connector,  in ptn3460_bridge_attach()
246 							bridge->encoder);  in ptn3460_bridge_attach()
248 	drm_helper_hpd_irq_event(ptn_bridge->connector.dev);  in ptn3460_bridge_attach()
263 	struct device *dev = &client->dev;  in ptn3460_probe()
270 		return -ENOMEM;  in ptn3460_probe()
273 	panel_bridge = devm_drm_of_get_bridge(dev, dev->of_node, 0, 0);  in ptn3460_probe()
277 	ptn_bridge->panel_bridge = panel_bridge;  in ptn3460_probe()
278 	ptn_bridge->client = client;  in ptn3460_probe()
280 	ptn_bridge->gpio_pd_n = devm_gpiod_get(&client->dev, "powerdown",  in ptn3460_probe()
282 	if (IS_ERR(ptn_bridge->gpio_pd_n)) {  in ptn3460_probe()
283 		ret = PTR_ERR(ptn_bridge->gpio_pd_n);  in ptn3460_probe()
292 	ptn_bridge->gpio_rst_n = devm_gpiod_get(&client->dev, "reset",  in ptn3460_probe()
294 	if (IS_ERR(ptn_bridge->gpio_rst_n)) {  in ptn3460_probe()
295 		ret = PTR_ERR(ptn_bridge->gpio_rst_n);  in ptn3460_probe()
300 	ret = of_property_read_u32(dev->of_node, "edid-emulation",  in ptn3460_probe()
301 			&ptn_bridge->edid_emulation);  in ptn3460_probe()
303 		dev_err(dev, "Can't read EDID emulation value\n");  in ptn3460_probe()
307 	ptn_bridge->bridge.funcs = &ptn3460_bridge_funcs;  in ptn3460_probe()
308 	ptn_bridge->bridge.ops = DRM_BRIDGE_OP_EDID;  in ptn3460_probe()
309 	ptn_bridge->bridge.type = DRM_MODE_CONNECTOR_LVDS;  in ptn3460_probe()
310 	ptn_bridge->bridge.of_node = dev->of_node;  in ptn3460_probe()
311 	drm_bridge_add(&ptn_bridge->bridge);  in ptn3460_probe()
322 	drm_bridge_remove(&ptn_bridge->bridge);  in ptn3460_remove()
349 MODULE_DESCRIPTION("NXP ptn3460 eDP-LVDS converter driver");