1 // SPDX-License-Identifier: GPL-2.0+
19 #include <linux/media-bus-format.h>
28 	WR_DISPLAY_SIZE		= 0x12,	/* Write Display Size */
57 	struct drm_bridge	bridge;  member
70 static inline struct dlpc *bridge_to_dlpc(struct drm_bridge *bridge)  in bridge_to_dlpc()  argument
72 	return container_of(bridge, struct dlpc, bridge);  in bridge_to_dlpc()
107 static void dlpc_atomic_enable(struct drm_bridge *bridge,  in dlpc_atomic_enable()  argument
110 	struct dlpc *dlpc = bridge_to_dlpc(bridge);  in dlpc_atomic_enable()
111 	struct device *dev = dlpc->dev;  in dlpc_atomic_enable()
112 	struct drm_display_mode *mode = &dlpc->mode;  in dlpc_atomic_enable()
113 	struct regmap *regmap = dlpc->regmap;  in dlpc_atomic_enable()
136 	buf[4] = mode->hdisplay & 0xff;  in dlpc_atomic_enable()
137 	buf[5] = (mode->hdisplay & 0xff00) >> 8;  in dlpc_atomic_enable()
138 	buf[6] = mode->vdisplay & 0xff;  in dlpc_atomic_enable()
139 	buf[7] = (mode->vdisplay & 0xff00) >> 8;  in dlpc_atomic_enable()
142 	/* set display size */  in dlpc_atomic_enable()
143 	buf[4] = mode->hdisplay & 0xff;  in dlpc_atomic_enable()
144 	buf[5] = (mode->hdisplay & 0xff00) >> 8;  in dlpc_atomic_enable()
145 	buf[6] = mode->vdisplay & 0xff;  in dlpc_atomic_enable()
146 	buf[7] = (mode->vdisplay & 0xff00) >> 8;  in dlpc_atomic_enable()
150 	buf[0] = mode->hdisplay & 0xff;  in dlpc_atomic_enable()
151 	buf[1] = (mode->hdisplay & 0xff00) >> 8;  in dlpc_atomic_enable()
152 	buf[2] = mode->vdisplay & 0xff;  in dlpc_atomic_enable()
153 	buf[3] = (mode->vdisplay & 0xff00) >> 8;  in dlpc_atomic_enable()
172 static void dlpc_atomic_pre_enable(struct drm_bridge *bridge,  in dlpc_atomic_pre_enable()  argument
175 	struct dlpc *dlpc = bridge_to_dlpc(bridge);  in dlpc_atomic_pre_enable()
178 	gpiod_set_value(dlpc->enable_gpio, 1);  in dlpc_atomic_pre_enable()
182 	ret = regulator_enable(dlpc->vcc_intf);  in dlpc_atomic_pre_enable()
184 		DRM_DEV_ERROR(dlpc->dev,  in dlpc_atomic_pre_enable()
187 	ret = regulator_enable(dlpc->vcc_flsh);  in dlpc_atomic_pre_enable()
189 		DRM_DEV_ERROR(dlpc->dev,  in dlpc_atomic_pre_enable()
195 static void dlpc_atomic_post_disable(struct drm_bridge *bridge,  in dlpc_atomic_post_disable()  argument
198 	struct dlpc *dlpc = bridge_to_dlpc(bridge);  in dlpc_atomic_post_disable()
200 	regulator_disable(dlpc->vcc_flsh);  in dlpc_atomic_post_disable()
201 	regulator_disable(dlpc->vcc_intf);  in dlpc_atomic_post_disable()
205 	gpiod_set_value(dlpc->enable_gpio, 0);  in dlpc_atomic_post_disable()
213 dlpc_atomic_get_input_bus_fmts(struct drm_bridge *bridge,  in dlpc_atomic_get_input_bus_fmts()  argument
229 	/* This is the DSI-end bus format */  in dlpc_atomic_get_input_bus_fmts()
236 static void dlpc_mode_set(struct drm_bridge *bridge,  in dlpc_mode_set()  argument
240 	struct dlpc *dlpc = bridge_to_dlpc(bridge);  in dlpc_mode_set()
242 	drm_mode_copy(&dlpc->mode, adjusted_mode);  in dlpc_mode_set()
245 static int dlpc_attach(struct drm_bridge *bridge,  in dlpc_attach()  argument
248 	struct dlpc *dlpc = bridge_to_dlpc(bridge);  in dlpc_attach()
250 	return drm_bridge_attach(bridge->encoder, dlpc->next_bridge, bridge, flags);  in dlpc_attach()
267 	struct device *dev = dlpc->dev;  in dlpc3433_parse_dt()
271 	dlpc->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);  in dlpc3433_parse_dt()
272 	if (IS_ERR(dlpc->enable_gpio))  in dlpc3433_parse_dt()
273 		return PTR_ERR(dlpc->enable_gpio);  in dlpc3433_parse_dt()
275 	dlpc->vcc_intf = devm_regulator_get(dlpc->dev, "vcc_intf");  in dlpc3433_parse_dt()
276 	if (IS_ERR(dlpc->vcc_intf))  in dlpc3433_parse_dt()
277 		return dev_err_probe(dev, PTR_ERR(dlpc->vcc_intf),  in dlpc3433_parse_dt()
280 	dlpc->vcc_flsh = devm_regulator_get(dlpc->dev, "vcc_flsh");  in dlpc3433_parse_dt()
281 	if (IS_ERR(dlpc->vcc_flsh))  in dlpc3433_parse_dt()
282 		return dev_err_probe(dev, PTR_ERR(dlpc->vcc_flsh),  in dlpc3433_parse_dt()
285 	dlpc->next_bridge = devm_drm_of_get_bridge(dev, dev->of_node, 1, 0);  in dlpc3433_parse_dt()
286 	if (IS_ERR(dlpc->next_bridge))  in dlpc3433_parse_dt()
287 		return PTR_ERR(dlpc->next_bridge);  in dlpc3433_parse_dt()
289 	endpoint = of_graph_get_endpoint_by_regs(dev->of_node, 0, 0);  in dlpc3433_parse_dt()
290 	dlpc->dsi_lanes = of_property_count_u32_elems(endpoint, "data-lanes");  in dlpc3433_parse_dt()
291 	if (dlpc->dsi_lanes < 0 || dlpc->dsi_lanes > 4) {  in dlpc3433_parse_dt()
292 		ret = -EINVAL;  in dlpc3433_parse_dt()
296 	dlpc->host_node = of_graph_get_remote_port_parent(endpoint);  in dlpc3433_parse_dt()
297 	if (!dlpc->host_node) {  in dlpc3433_parse_dt()
298 		ret = -ENODEV;  in dlpc3433_parse_dt()
307 	of_node_put(dlpc->host_node);  in dlpc3433_parse_dt()
315 	struct device *dev = dlpc->dev;  in dlpc_host_attach()
324 	host = of_find_mipi_dsi_host_by_node(dlpc->host_node);  in dlpc_host_attach()
326 		return dev_err_probe(dev, -EPROBE_DEFER, "failed to find dsi host\n");  in dlpc_host_attach()
328 	dlpc->dsi = mipi_dsi_device_register_full(host, &info);  in dlpc_host_attach()
329 	if (IS_ERR(dlpc->dsi)) {  in dlpc_host_attach()
331 		return PTR_ERR(dlpc->dsi);  in dlpc_host_attach()
334 	dlpc->dsi->mode_flags = MIPI_DSI_MODE_VIDEO_BURST;  in dlpc_host_attach()
335 	dlpc->dsi->format = MIPI_DSI_FMT_RGB565;  in dlpc_host_attach()
336 	dlpc->dsi->lanes = dlpc->dsi_lanes;  in dlpc_host_attach()
338 	ret = devm_mipi_dsi_attach(dev, dlpc->dsi);  in dlpc_host_attach()
347 	struct device *dev = &client->dev;  in dlpc3433_probe()
353 		return -ENOMEM;  in dlpc3433_probe()
355 	dlpc->dev = dev;  in dlpc3433_probe()
357 	dlpc->regmap = devm_regmap_init_i2c(client, &dlpc_regmap_config);  in dlpc3433_probe()
358 	if (IS_ERR(dlpc->regmap))  in dlpc3433_probe()
359 		return PTR_ERR(dlpc->regmap);  in dlpc3433_probe()
368 	dlpc->bridge.funcs = &dlpc_bridge_funcs;  in dlpc3433_probe()
369 	dlpc->bridge.of_node = dev->of_node;  in dlpc3433_probe()
370 	drm_bridge_add(&dlpc->bridge);  in dlpc3433_probe()
379 	drm_bridge_remove(&dlpc->bridge);  in dlpc3433_probe()
387 	drm_bridge_remove(&dlpc->bridge);  in dlpc3433_remove()
388 	of_node_put(dlpc->host_node);  in dlpc3433_remove()
408 		.name = "ti-dlpc3433",
416 MODULE_DESCRIPTION("TI DLPC3433 MIPI DSI Display Controller Bridge");