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()
253  * of_find_mipi_dsi_host_by_node() - find the MIPI DSI host matching a
258  * A pointer to the MIPI DSI host corresponding to @node or NULL if no
301 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev);  in mipi_dsi_remove_device_fn()  local
303 	mipi_dsi_device_unregister(dsi);  in mipi_dsi_remove_device_fn()
319  * mipi_dsi_attach - attach a DSI device to its DSI host
320  * @dsi: DSI peripheral
322 int mipi_dsi_attach(struct mipi_dsi_device *dsi)  in mipi_dsi_attach()  argument
324 	const struct mipi_dsi_host_ops *ops = dsi->host->ops;  in mipi_dsi_attach()
329 	return ops->attach(dsi->host, dsi);  in mipi_dsi_attach()
334  * mipi_dsi_detach - detach a DSI device from its DSI host
335  * @dsi: DSI peripheral
337 int mipi_dsi_detach(struct mipi_dsi_device *dsi)  in mipi_dsi_detach()  argument
339 	const struct mipi_dsi_host_ops *ops = dsi->host->ops;  in mipi_dsi_detach()
344 	return ops->detach(dsi->host, dsi);  in mipi_dsi_detach()
348 static ssize_t mipi_dsi_device_transfer(struct mipi_dsi_device *dsi,  in mipi_dsi_device_transfer()  argument
351 	const struct mipi_dsi_host_ops *ops = dsi->host->ops;  in mipi_dsi_device_transfer()
356 	if (dsi->mode_flags & MIPI_DSI_MODE_LPM)  in mipi_dsi_device_transfer()
359 	return ops->transfer(dsi->host, msg);  in mipi_dsi_device_transfer()
364  * @type: MIPI DSI data type of the packet
402  * @type: MIPI DSI data type of the packet
435  *     DSI protocol
436  * @packet: pointer to a DSI packet structure
488  * @dsi: DSI peripheral device
492 int mipi_dsi_shutdown_peripheral(struct mipi_dsi_device *dsi)  in mipi_dsi_shutdown_peripheral()  argument
495 		.channel = dsi->channel,  in mipi_dsi_shutdown_peripheral()
500 	int ret = mipi_dsi_device_transfer(dsi, &msg);  in mipi_dsi_shutdown_peripheral()
508  * @dsi: DSI peripheral device
512 int mipi_dsi_turn_on_peripheral(struct mipi_dsi_device *dsi)  in mipi_dsi_turn_on_peripheral()  argument
515 		.channel = dsi->channel,  in mipi_dsi_turn_on_peripheral()
520 	int ret = mipi_dsi_device_transfer(dsi, &msg);  in mipi_dsi_turn_on_peripheral()
530  * @dsi: DSI peripheral device
535 int mipi_dsi_set_maximum_return_packet_size(struct mipi_dsi_device *dsi,  in mipi_dsi_set_maximum_return_packet_size()  argument
540 		.channel = dsi->channel,  in mipi_dsi_set_maximum_return_packet_size()
545 	int ret = mipi_dsi_device_transfer(dsi, &msg);  in mipi_dsi_set_maximum_return_packet_size()
553  * @dsi: DSI peripheral device
561 ssize_t mipi_dsi_compression_mode(struct mipi_dsi_device *dsi, bool enable)  in mipi_dsi_compression_mode()  argument
566 		.channel = dsi->channel,  in mipi_dsi_compression_mode()
571 	int ret = mipi_dsi_device_transfer(dsi, &msg);  in mipi_dsi_compression_mode()
579  * @dsi: DSI peripheral device
586 ssize_t mipi_dsi_picture_parameter_set(struct mipi_dsi_device *dsi,  in mipi_dsi_picture_parameter_set()  argument
590 		.channel = dsi->channel,  in mipi_dsi_picture_parameter_set()
595 	int ret = mipi_dsi_device_transfer(dsi, &msg);  in mipi_dsi_picture_parameter_set()
603  * @dsi: DSI peripheral device
613 ssize_t mipi_dsi_generic_write(struct mipi_dsi_device *dsi, const void *payload,  in mipi_dsi_generic_write()  argument
617 		.channel = dsi->channel,  in mipi_dsi_generic_write()
640 	return mipi_dsi_device_transfer(dsi, &msg);  in mipi_dsi_generic_write()
646  * @dsi: DSI peripheral device
658 ssize_t mipi_dsi_generic_read(struct mipi_dsi_device *dsi, const void *params,  in mipi_dsi_generic_read()  argument
662 		.channel = dsi->channel,  in mipi_dsi_generic_read()
686 	return mipi_dsi_device_transfer(dsi, &msg);  in mipi_dsi_generic_read()
692  * @dsi: DSI peripheral device
702 ssize_t mipi_dsi_dcs_write_buffer(struct mipi_dsi_device *dsi,  in mipi_dsi_dcs_write_buffer()  argument
706 		.channel = dsi->channel,  in mipi_dsi_dcs_write_buffer()
728 	return mipi_dsi_device_transfer(dsi, &msg);  in mipi_dsi_dcs_write_buffer()
734  * @dsi: DSI peripheral device
745 ssize_t mipi_dsi_dcs_write(struct mipi_dsi_device *dsi, u8 cmd,  in mipi_dsi_dcs_write()  argument
767 	err = mipi_dsi_dcs_write_buffer(dsi, tx, size);  in mipi_dsi_dcs_write()
778  * @dsi: DSI peripheral device
785 ssize_t mipi_dsi_dcs_read(struct mipi_dsi_device *dsi, u8 cmd, void *data,  in mipi_dsi_dcs_read()  argument
789 		.channel = dsi->channel,  in mipi_dsi_dcs_read()
797 	return mipi_dsi_device_transfer(dsi, &msg);  in mipi_dsi_dcs_read()
803  * @dsi: DSI peripheral device
807 int mipi_dsi_dcs_nop(struct mipi_dsi_device *dsi)  in mipi_dsi_dcs_nop()  argument
811 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_NOP, NULL, 0);  in mipi_dsi_dcs_nop()
821  * @dsi: DSI peripheral device
825 int mipi_dsi_dcs_soft_reset(struct mipi_dsi_device *dsi)  in mipi_dsi_dcs_soft_reset()  argument
829 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SOFT_RESET, NULL, 0);  in mipi_dsi_dcs_soft_reset()
840  * @dsi: DSI peripheral device
845 int mipi_dsi_dcs_get_power_mode(struct mipi_dsi_device *dsi, u8 *mode)  in mipi_dsi_dcs_get_power_mode()  argument
849 	err = mipi_dsi_dcs_read(dsi, MIPI_DCS_GET_POWER_MODE, mode,  in mipi_dsi_dcs_get_power_mode()
865  * @dsi: DSI peripheral device
870 int mipi_dsi_dcs_get_pixel_format(struct mipi_dsi_device *dsi, u8 *format)  in mipi_dsi_dcs_get_pixel_format()  argument
874 	err = mipi_dsi_dcs_read(dsi, MIPI_DCS_GET_PIXEL_FORMAT, format,  in mipi_dsi_dcs_get_pixel_format()
890  * @dsi: DSI peripheral device
894 int mipi_dsi_dcs_enter_sleep_mode(struct mipi_dsi_device *dsi)  in mipi_dsi_dcs_enter_sleep_mode()  argument
898 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_ENTER_SLEEP_MODE, NULL, 0);  in mipi_dsi_dcs_enter_sleep_mode()
909  * @dsi: DSI peripheral device
913 int mipi_dsi_dcs_exit_sleep_mode(struct mipi_dsi_device *dsi)  in mipi_dsi_dcs_exit_sleep_mode()  argument
917 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_EXIT_SLEEP_MODE, NULL, 0);  in mipi_dsi_dcs_exit_sleep_mode()
928  * @dsi: DSI peripheral device
932 int mipi_dsi_dcs_set_display_off(struct mipi_dsi_device *dsi)  in mipi_dsi_dcs_set_display_off()  argument
936 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_DISPLAY_OFF, NULL, 0);  in mipi_dsi_dcs_set_display_off()
947  * @dsi: DSI peripheral device
951 int mipi_dsi_dcs_set_display_on(struct mipi_dsi_device *dsi)  in mipi_dsi_dcs_set_display_on()  argument
955 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_DISPLAY_ON, NULL, 0);  in mipi_dsi_dcs_set_display_on()
966  * @dsi: DSI peripheral device
972 int mipi_dsi_dcs_set_column_address(struct mipi_dsi_device *dsi, u16 start,  in mipi_dsi_dcs_set_column_address()  argument
978 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_COLUMN_ADDRESS, payload,  in mipi_dsi_dcs_set_column_address()
990  * @dsi: DSI peripheral device
996 int mipi_dsi_dcs_set_page_address(struct mipi_dsi_device *dsi, u16 start,  in mipi_dsi_dcs_set_page_address()  argument
1002 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_PAGE_ADDRESS, payload,  in mipi_dsi_dcs_set_page_address()
1014  * @dsi: DSI peripheral device
1018 int mipi_dsi_dcs_set_tear_off(struct mipi_dsi_device *dsi)  in mipi_dsi_dcs_set_tear_off()  argument
1022 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_TEAR_OFF, NULL, 0);  in mipi_dsi_dcs_set_tear_off()
1033  * @dsi: DSI peripheral device
1038 int mipi_dsi_dcs_set_tear_on(struct mipi_dsi_device *dsi,  in mipi_dsi_dcs_set_tear_on()  argument
1044 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_TEAR_ON, &value,  in mipi_dsi_dcs_set_tear_on()
1056  * @dsi: DSI peripheral device
1061 int mipi_dsi_dcs_set_pixel_format(struct mipi_dsi_device *dsi, u8 format)  in mipi_dsi_dcs_set_pixel_format()  argument
1065 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_PIXEL_FORMAT, &format,  in mipi_dsi_dcs_set_pixel_format()
1077  * @dsi: DSI peripheral device
1082 int mipi_dsi_dcs_set_tear_scanline(struct mipi_dsi_device *dsi, u16 scanline)  in mipi_dsi_dcs_set_tear_scanline()  argument
1087 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_TEAR_SCANLINE, payload,  in mipi_dsi_dcs_set_tear_scanline()
1099  * @dsi: DSI peripheral device
1104 int mipi_dsi_dcs_set_display_brightness(struct mipi_dsi_device *dsi,  in mipi_dsi_dcs_set_display_brightness()  argument
1110 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_DISPLAY_BRIGHTNESS,  in mipi_dsi_dcs_set_display_brightness()
1122  * @dsi: DSI peripheral device
1127 int mipi_dsi_dcs_get_display_brightness(struct mipi_dsi_device *dsi,  in mipi_dsi_dcs_get_display_brightness()  argument
1132 	err = mipi_dsi_dcs_read(dsi, MIPI_DCS_GET_DISPLAY_BRIGHTNESS,  in mipi_dsi_dcs_get_display_brightness()
1148 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev);  in mipi_dsi_drv_probe()  local
1150 	return drv->probe(dsi);  in mipi_dsi_drv_probe()
1156 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev);  in mipi_dsi_drv_remove()  local
1158 	return drv->remove(dsi);  in mipi_dsi_drv_remove()
1164 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev);  in mipi_dsi_drv_shutdown()  local
1166 	drv->shutdown(dsi);  in mipi_dsi_drv_shutdown()
1170  * mipi_dsi_driver_register_full() - register a driver for DSI devices
1171  * @drv: DSI driver structure
1194  * mipi_dsi_driver_unregister() - unregister a driver for DSI devices
1195  * @drv: DSI driver structure
1212 MODULE_DESCRIPTION("MIPI DSI Bus");