2  * MIPI DSI Bus
41  * DOC: dsi helpers
43  * These functions contain some common logic and helpers to deal with MIPI DSI
46  * Helpers are provided for a number of standard MIPI DSI command as well as a
52 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev);  in mipi_dsi_device_match()  local
58 	/* compare DSI device and driver names */  in mipi_dsi_device_match()
59 	if (!strcmp(dsi->name, drv->name))  in mipi_dsi_device_match()
67 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev);  in mipi_dsi_uevent()  local
75 		       dsi->name);  in mipi_dsi_uevent()
92 	.name = "mipi-dsi",
99  * of_find_mipi_dsi_device_by_node() - find the MIPI DSI device matching a
103  * Return: A pointer to the MIPI DSI device corresponding to @np or NULL if no
118 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev);  in mipi_dsi_dev_release()  local
121 	kfree(dsi);  in mipi_dsi_dev_release()
130 	struct mipi_dsi_device *dsi;  in mipi_dsi_device_alloc()  local
132 	dsi = kzalloc(sizeof(*dsi), GFP_KERNEL);  in mipi_dsi_device_alloc()
133 	if (!dsi)  in mipi_dsi_device_alloc()
136 	dsi->host = host;  in mipi_dsi_device_alloc()
137 	dsi->dev.bus = &mipi_dsi_bus_type;  in mipi_dsi_device_alloc()
138 	dsi->dev.parent = host->dev;  in mipi_dsi_device_alloc()
139 	dsi->dev.type = &mipi_dsi_device_type;  in mipi_dsi_device_alloc()
141 	device_initialize(&dsi->dev);  in mipi_dsi_device_alloc()
143 	return dsi;  in mipi_dsi_device_alloc()
146 static int mipi_dsi_device_add(struct mipi_dsi_device *dsi)  in mipi_dsi_device_add()  argument
148 	struct mipi_dsi_host *host = dsi->host;  in mipi_dsi_device_add()
150 	dev_set_name(&dsi->dev, "%s.%d", dev_name(host->dev),  dsi->channel);  in mipi_dsi_device_add()
152 	return device_add(&dsi->dev);  in mipi_dsi_device_add()
189  * mipi_dsi_device_register_full - create a MIPI DSI device
190  * @host: DSI host to which this device is connected
191  * @info: pointer to template containing DSI device information
193  * Create a MIPI DSI device by using the device information provided by
197  * A pointer to the newly created MIPI DSI device, or, a pointer encoded
204 	struct mipi_dsi_device *dsi;  in mipi_dsi_device_register_full()  local
217 	dsi = mipi_dsi_device_alloc(host);  in mipi_dsi_device_register_full()
218 	if (IS_ERR(dsi)) {  in mipi_dsi_device_register_full()
219 		drm_err(host, "failed to allocate DSI device %ld\n",  in mipi_dsi_device_register_full()
220 			PTR_ERR(dsi));  in mipi_dsi_device_register_full()
221 		return dsi;  in mipi_dsi_device_register_full()
224 	dsi->dev.of_node = info->node;  in mipi_dsi_device_register_full()
225 	dsi->channel = info->channel;  in mipi_dsi_device_register_full()
226 	strlcpy(dsi->name, info->type, sizeof(dsi->name));  in mipi_dsi_device_register_full()
228 	ret = mipi_dsi_device_add(dsi);  in mipi_dsi_device_register_full()
230 		drm_err(host, "failed to add DSI device %d\n", ret);  in mipi_dsi_device_register_full()
231 		kfree(dsi);  in mipi_dsi_device_register_full()
235 	return dsi;  in mipi_dsi_device_register_full()
240  * mipi_dsi_device_unregister - unregister MIPI DSI device
241  * @dsi: DSI peripheral device
243 void mipi_dsi_device_unregister(struct mipi_dsi_device *dsi)  in mipi_dsi_device_unregister()  argument
245 	device_unregister(&dsi->dev);  in mipi_dsi_device_unregister()
251 	struct mipi_dsi_device *dsi = arg;  in devm_mipi_dsi_device_unregister()  local
253 	mipi_dsi_device_unregister(dsi);  in devm_mipi_dsi_device_unregister()
257  * devm_mipi_dsi_device_register_full - create a managed MIPI DSI device
258  * @dev: device to tie the MIPI-DSI device lifetime to
259  * @host: DSI host to which this device is connected
260  * @info: pointer to template containing DSI device information
262  * Create a MIPI DSI device by using the device information provided by
270  * A pointer to the newly created MIPI DSI device, or, a pointer encoded
278 	struct mipi_dsi_device *dsi;  in devm_mipi_dsi_device_register_full()  local
281 	dsi = mipi_dsi_device_register_full(host, info);  in devm_mipi_dsi_device_register_full()
282 	if (IS_ERR(dsi))  in devm_mipi_dsi_device_register_full()
283 		return dsi;  in devm_mipi_dsi_device_register_full()
287 				       dsi);  in devm_mipi_dsi_device_register_full()
291 	return dsi;  in devm_mipi_dsi_device_register_full()
299  * of_find_mipi_dsi_host_by_node() - find the MIPI DSI host matching a
304  * A pointer to the MIPI DSI host corresponding to @node or NULL if no
347 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev);  in mipi_dsi_remove_device_fn()  local
349 	mipi_dsi_detach(dsi);  in mipi_dsi_remove_device_fn()
350 	mipi_dsi_device_unregister(dsi);  in mipi_dsi_remove_device_fn()
366  * mipi_dsi_attach - attach a DSI device to its DSI host
367  * @dsi: DSI peripheral
369 int mipi_dsi_attach(struct mipi_dsi_device *dsi)  in mipi_dsi_attach()  argument
371 	const struct mipi_dsi_host_ops *ops = dsi->host->ops;  in mipi_dsi_attach()
376 	return ops->attach(dsi->host, dsi);  in mipi_dsi_attach()
381  * mipi_dsi_detach - detach a DSI device from its DSI host
382  * @dsi: DSI peripheral
384 int mipi_dsi_detach(struct mipi_dsi_device *dsi)  in mipi_dsi_detach()  argument
386 	const struct mipi_dsi_host_ops *ops = dsi->host->ops;  in mipi_dsi_detach()
391 	return ops->detach(dsi->host, dsi);  in mipi_dsi_detach()
397 	struct mipi_dsi_device *dsi = arg;  in devm_mipi_dsi_detach()  local
399 	mipi_dsi_detach(dsi);  in devm_mipi_dsi_detach()
403  * devm_mipi_dsi_attach - Attach a MIPI-DSI device to its DSI Host
404  * @dev: device to tie the MIPI-DSI device attachment lifetime to
405  * @dsi: DSI peripheral
414 			 struct mipi_dsi_device *dsi)  in devm_mipi_dsi_attach()  argument
418 	ret = mipi_dsi_attach(dsi);  in devm_mipi_dsi_attach()
422 	ret = devm_add_action_or_reset(dev, devm_mipi_dsi_detach, dsi);  in devm_mipi_dsi_attach()
430 static ssize_t mipi_dsi_device_transfer(struct mipi_dsi_device *dsi,  in mipi_dsi_device_transfer()  argument
433 	const struct mipi_dsi_host_ops *ops = dsi->host->ops;  in mipi_dsi_device_transfer()
438 	if (dsi->mode_flags & MIPI_DSI_MODE_LPM)  in mipi_dsi_device_transfer()
441 	return ops->transfer(dsi->host, msg);  in mipi_dsi_device_transfer()
446  * @type: MIPI DSI data type of the packet
484  * @type: MIPI DSI data type of the packet
517  *     DSI protocol
518  * @packet: pointer to a DSI packet structure
570  * @dsi: DSI peripheral device
574 int mipi_dsi_shutdown_peripheral(struct mipi_dsi_device *dsi)  in mipi_dsi_shutdown_peripheral()  argument
577 		.channel = dsi->channel,  in mipi_dsi_shutdown_peripheral()
582 	int ret = mipi_dsi_device_transfer(dsi, &msg);  in mipi_dsi_shutdown_peripheral()
590  * @dsi: DSI peripheral device
594 int mipi_dsi_turn_on_peripheral(struct mipi_dsi_device *dsi)  in mipi_dsi_turn_on_peripheral()  argument
597 		.channel = dsi->channel,  in mipi_dsi_turn_on_peripheral()
602 	int ret = mipi_dsi_device_transfer(dsi, &msg);  in mipi_dsi_turn_on_peripheral()
612  * @dsi: DSI peripheral device
617 int mipi_dsi_set_maximum_return_packet_size(struct mipi_dsi_device *dsi,  in mipi_dsi_set_maximum_return_packet_size()  argument
622 		.channel = dsi->channel,  in mipi_dsi_set_maximum_return_packet_size()
627 	int ret = mipi_dsi_device_transfer(dsi, &msg);  in mipi_dsi_set_maximum_return_packet_size()
635  * @dsi: DSI peripheral device
643 ssize_t mipi_dsi_compression_mode(struct mipi_dsi_device *dsi, bool enable)  in mipi_dsi_compression_mode()  argument
648 		.channel = dsi->channel,  in mipi_dsi_compression_mode()
653 	int ret = mipi_dsi_device_transfer(dsi, &msg);  in mipi_dsi_compression_mode()
661  * @dsi: DSI peripheral device
668 ssize_t mipi_dsi_picture_parameter_set(struct mipi_dsi_device *dsi,  in mipi_dsi_picture_parameter_set()  argument
672 		.channel = dsi->channel,  in mipi_dsi_picture_parameter_set()
677 	int ret = mipi_dsi_device_transfer(dsi, &msg);  in mipi_dsi_picture_parameter_set()
685  * @dsi: DSI peripheral device
695 ssize_t mipi_dsi_generic_write(struct mipi_dsi_device *dsi, const void *payload,  in mipi_dsi_generic_write()  argument
699 		.channel = dsi->channel,  in mipi_dsi_generic_write()
722 	return mipi_dsi_device_transfer(dsi, &msg);  in mipi_dsi_generic_write()
728  * @dsi: DSI peripheral device
740 ssize_t mipi_dsi_generic_read(struct mipi_dsi_device *dsi, const void *params,  in mipi_dsi_generic_read()  argument
744 		.channel = dsi->channel,  in mipi_dsi_generic_read()
768 	return mipi_dsi_device_transfer(dsi, &msg);  in mipi_dsi_generic_read()
774  * @dsi: DSI peripheral device
784 ssize_t mipi_dsi_dcs_write_buffer(struct mipi_dsi_device *dsi,  in mipi_dsi_dcs_write_buffer()  argument
788 		.channel = dsi->channel,  in mipi_dsi_dcs_write_buffer()
810 	return mipi_dsi_device_transfer(dsi, &msg);  in mipi_dsi_dcs_write_buffer()
816  * @dsi: DSI peripheral device
827 ssize_t mipi_dsi_dcs_write(struct mipi_dsi_device *dsi, u8 cmd,  in mipi_dsi_dcs_write()  argument
849 	err = mipi_dsi_dcs_write_buffer(dsi, tx, size);  in mipi_dsi_dcs_write()
860  * @dsi: DSI peripheral device
867 ssize_t mipi_dsi_dcs_read(struct mipi_dsi_device *dsi, u8 cmd, void *data,  in mipi_dsi_dcs_read()  argument
871 		.channel = dsi->channel,  in mipi_dsi_dcs_read()
879 	return mipi_dsi_device_transfer(dsi, &msg);  in mipi_dsi_dcs_read()
885  * @dsi: DSI peripheral device
889 int mipi_dsi_dcs_nop(struct mipi_dsi_device *dsi)  in mipi_dsi_dcs_nop()  argument
893 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_NOP, NULL, 0);  in mipi_dsi_dcs_nop()
903  * @dsi: DSI peripheral device
907 int mipi_dsi_dcs_soft_reset(struct mipi_dsi_device *dsi)  in mipi_dsi_dcs_soft_reset()  argument
911 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SOFT_RESET, NULL, 0);  in mipi_dsi_dcs_soft_reset()
922  * @dsi: DSI peripheral device
927 int mipi_dsi_dcs_get_power_mode(struct mipi_dsi_device *dsi, u8 *mode)  in mipi_dsi_dcs_get_power_mode()  argument
931 	err = mipi_dsi_dcs_read(dsi, MIPI_DCS_GET_POWER_MODE, mode,  in mipi_dsi_dcs_get_power_mode()
947  * @dsi: DSI peripheral device
952 int mipi_dsi_dcs_get_pixel_format(struct mipi_dsi_device *dsi, u8 *format)  in mipi_dsi_dcs_get_pixel_format()  argument
956 	err = mipi_dsi_dcs_read(dsi, MIPI_DCS_GET_PIXEL_FORMAT, format,  in mipi_dsi_dcs_get_pixel_format()
972  * @dsi: DSI peripheral device
976 int mipi_dsi_dcs_enter_sleep_mode(struct mipi_dsi_device *dsi)  in mipi_dsi_dcs_enter_sleep_mode()  argument
980 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_ENTER_SLEEP_MODE, NULL, 0);  in mipi_dsi_dcs_enter_sleep_mode()
991  * @dsi: DSI peripheral device
995 int mipi_dsi_dcs_exit_sleep_mode(struct mipi_dsi_device *dsi)  in mipi_dsi_dcs_exit_sleep_mode()  argument
999 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_EXIT_SLEEP_MODE, NULL, 0);  in mipi_dsi_dcs_exit_sleep_mode()
1010  * @dsi: DSI peripheral device
1014 int mipi_dsi_dcs_set_display_off(struct mipi_dsi_device *dsi)  in mipi_dsi_dcs_set_display_off()  argument
1018 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_DISPLAY_OFF, NULL, 0);  in mipi_dsi_dcs_set_display_off()
1029  * @dsi: DSI peripheral device
1033 int mipi_dsi_dcs_set_display_on(struct mipi_dsi_device *dsi)  in mipi_dsi_dcs_set_display_on()  argument
1037 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_DISPLAY_ON, NULL, 0);  in mipi_dsi_dcs_set_display_on()
1048  * @dsi: DSI peripheral device
1054 int mipi_dsi_dcs_set_column_address(struct mipi_dsi_device *dsi, u16 start,  in mipi_dsi_dcs_set_column_address()  argument
1060 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_COLUMN_ADDRESS, payload,  in mipi_dsi_dcs_set_column_address()
1072  * @dsi: DSI peripheral device
1078 int mipi_dsi_dcs_set_page_address(struct mipi_dsi_device *dsi, u16 start,  in mipi_dsi_dcs_set_page_address()  argument
1084 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_PAGE_ADDRESS, payload,  in mipi_dsi_dcs_set_page_address()
1096  * @dsi: DSI peripheral device
1100 int mipi_dsi_dcs_set_tear_off(struct mipi_dsi_device *dsi)  in mipi_dsi_dcs_set_tear_off()  argument
1104 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_TEAR_OFF, NULL, 0);  in mipi_dsi_dcs_set_tear_off()
1115  * @dsi: DSI peripheral device
1120 int mipi_dsi_dcs_set_tear_on(struct mipi_dsi_device *dsi,  in mipi_dsi_dcs_set_tear_on()  argument
1126 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_TEAR_ON, &value,  in mipi_dsi_dcs_set_tear_on()
1138  * @dsi: DSI peripheral device
1143 int mipi_dsi_dcs_set_pixel_format(struct mipi_dsi_device *dsi, u8 format)  in mipi_dsi_dcs_set_pixel_format()  argument
1147 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_PIXEL_FORMAT, &format,  in mipi_dsi_dcs_set_pixel_format()
1159  * @dsi: DSI peripheral device
1164 int mipi_dsi_dcs_set_tear_scanline(struct mipi_dsi_device *dsi, u16 scanline)  in mipi_dsi_dcs_set_tear_scanline()  argument
1169 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_TEAR_SCANLINE, payload,  in mipi_dsi_dcs_set_tear_scanline()
1181  * @dsi: DSI peripheral device
1186 int mipi_dsi_dcs_set_display_brightness(struct mipi_dsi_device *dsi,  in mipi_dsi_dcs_set_display_brightness()  argument
1192 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_DISPLAY_BRIGHTNESS,  in mipi_dsi_dcs_set_display_brightness()
1204  * @dsi: DSI peripheral device
1209 int mipi_dsi_dcs_get_display_brightness(struct mipi_dsi_device *dsi,  in mipi_dsi_dcs_get_display_brightness()  argument
1214 	err = mipi_dsi_dcs_read(dsi, MIPI_DCS_GET_DISPLAY_BRIGHTNESS,  in mipi_dsi_dcs_get_display_brightness()
1230 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev);  in mipi_dsi_drv_probe()  local
1232 	return drv->probe(dsi);  in mipi_dsi_drv_probe()
1238 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev);  in mipi_dsi_drv_remove()  local
1240 	drv->remove(dsi);  in mipi_dsi_drv_remove()
1248 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev);  in mipi_dsi_drv_shutdown()  local
1250 	drv->shutdown(dsi);  in mipi_dsi_drv_shutdown()
1254  * mipi_dsi_driver_register_full() - register a driver for DSI devices
1255  * @drv: DSI driver structure
1278  * mipi_dsi_driver_unregister() - unregister a driver for DSI devices
1279  * @drv: DSI driver structure
1296 MODULE_DESCRIPTION("MIPI DSI Bus");