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 	device_set_node(&dsi->dev, of_fwnode_handle(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 	if (dsi->attached)  in mipi_dsi_remove_device_fn()
304 		mipi_dsi_detach(dsi);  in mipi_dsi_remove_device_fn()
305 	mipi_dsi_device_unregister(dsi);  in mipi_dsi_remove_device_fn()
321  * mipi_dsi_attach - attach a DSI device to its DSI host
322  * @dsi: DSI peripheral
324 int mipi_dsi_attach(struct mipi_dsi_device *dsi)  in mipi_dsi_attach()  argument
326 	const struct mipi_dsi_host_ops *ops = dsi->host->ops;  in mipi_dsi_attach()
332 	ret = ops->attach(dsi->host, dsi);  in mipi_dsi_attach()
336 	dsi->attached = true;  in mipi_dsi_attach()
343  * mipi_dsi_detach - detach a DSI device from its DSI host
344  * @dsi: DSI peripheral
346 int mipi_dsi_detach(struct mipi_dsi_device *dsi)  in mipi_dsi_detach()  argument
348 	const struct mipi_dsi_host_ops *ops = dsi->host->ops;  in mipi_dsi_detach()
350 	if (WARN_ON(!dsi->attached))  in mipi_dsi_detach()
356 	dsi->attached = false;  in mipi_dsi_detach()
358 	return ops->detach(dsi->host, dsi);  in mipi_dsi_detach()
362 static ssize_t mipi_dsi_device_transfer(struct mipi_dsi_device *dsi,  in mipi_dsi_device_transfer()  argument
365 	const struct mipi_dsi_host_ops *ops = dsi->host->ops;  in mipi_dsi_device_transfer()
370 	if (dsi->mode_flags & MIPI_DSI_MODE_LPM)  in mipi_dsi_device_transfer()
373 	return ops->transfer(dsi->host, msg);  in mipi_dsi_device_transfer()
378  * @type: MIPI DSI data type of the packet
416  * @type: MIPI DSI data type of the packet
449  *     DSI protocol
450  * @packet: pointer to a DSI packet structure
502  * @dsi: DSI peripheral device
506 int mipi_dsi_shutdown_peripheral(struct mipi_dsi_device *dsi)  in mipi_dsi_shutdown_peripheral()  argument
509 		.channel = dsi->channel,  in mipi_dsi_shutdown_peripheral()
514 	int ret = mipi_dsi_device_transfer(dsi, &msg);  in mipi_dsi_shutdown_peripheral()
522  * @dsi: DSI peripheral device
526 int mipi_dsi_turn_on_peripheral(struct mipi_dsi_device *dsi)  in mipi_dsi_turn_on_peripheral()  argument
529 		.channel = dsi->channel,  in mipi_dsi_turn_on_peripheral()
534 	int ret = mipi_dsi_device_transfer(dsi, &msg);  in mipi_dsi_turn_on_peripheral()
544  * @dsi: DSI peripheral device
549 int mipi_dsi_set_maximum_return_packet_size(struct mipi_dsi_device *dsi,  in mipi_dsi_set_maximum_return_packet_size()  argument
554 		.channel = dsi->channel,  in mipi_dsi_set_maximum_return_packet_size()
559 	int ret = mipi_dsi_device_transfer(dsi, &msg);  in mipi_dsi_set_maximum_return_packet_size()
567  * @dsi: DSI peripheral device
575 ssize_t mipi_dsi_compression_mode(struct mipi_dsi_device *dsi, bool enable)  in mipi_dsi_compression_mode()  argument
580 		.channel = dsi->channel,  in mipi_dsi_compression_mode()
585 	int ret = mipi_dsi_device_transfer(dsi, &msg);  in mipi_dsi_compression_mode()
593  * @dsi: DSI peripheral device
600 ssize_t mipi_dsi_picture_parameter_set(struct mipi_dsi_device *dsi,  in mipi_dsi_picture_parameter_set()  argument
604 		.channel = dsi->channel,  in mipi_dsi_picture_parameter_set()
609 	int ret = mipi_dsi_device_transfer(dsi, &msg);  in mipi_dsi_picture_parameter_set()
617  * @dsi: DSI peripheral device
627 ssize_t mipi_dsi_generic_write(struct mipi_dsi_device *dsi, const void *payload,  in mipi_dsi_generic_write()  argument
631 		.channel = dsi->channel,  in mipi_dsi_generic_write()
654 	return mipi_dsi_device_transfer(dsi, &msg);  in mipi_dsi_generic_write()
660  * @dsi: DSI peripheral device
672 ssize_t mipi_dsi_generic_read(struct mipi_dsi_device *dsi, const void *params,  in mipi_dsi_generic_read()  argument
676 		.channel = dsi->channel,  in mipi_dsi_generic_read()
700 	return mipi_dsi_device_transfer(dsi, &msg);  in mipi_dsi_generic_read()
706  * @dsi: DSI peripheral device
716 ssize_t mipi_dsi_dcs_write_buffer(struct mipi_dsi_device *dsi,  in mipi_dsi_dcs_write_buffer()  argument
720 		.channel = dsi->channel,  in mipi_dsi_dcs_write_buffer()
742 	return mipi_dsi_device_transfer(dsi, &msg);  in mipi_dsi_dcs_write_buffer()
748  * @dsi: DSI peripheral device
759 ssize_t mipi_dsi_dcs_write(struct mipi_dsi_device *dsi, u8 cmd,  in mipi_dsi_dcs_write()  argument
781 	err = mipi_dsi_dcs_write_buffer(dsi, tx, size);  in mipi_dsi_dcs_write()
792  * @dsi: DSI peripheral device
799 ssize_t mipi_dsi_dcs_read(struct mipi_dsi_device *dsi, u8 cmd, void *data,  in mipi_dsi_dcs_read()  argument
803 		.channel = dsi->channel,  in mipi_dsi_dcs_read()
811 	return mipi_dsi_device_transfer(dsi, &msg);  in mipi_dsi_dcs_read()
817  * @dsi: DSI peripheral device
821 int mipi_dsi_dcs_nop(struct mipi_dsi_device *dsi)  in mipi_dsi_dcs_nop()  argument
825 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_NOP, NULL, 0);  in mipi_dsi_dcs_nop()
835  * @dsi: DSI peripheral device
839 int mipi_dsi_dcs_soft_reset(struct mipi_dsi_device *dsi)  in mipi_dsi_dcs_soft_reset()  argument
843 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SOFT_RESET, NULL, 0);  in mipi_dsi_dcs_soft_reset()
854  * @dsi: DSI peripheral device
859 int mipi_dsi_dcs_get_power_mode(struct mipi_dsi_device *dsi, u8 *mode)  in mipi_dsi_dcs_get_power_mode()  argument
863 	err = mipi_dsi_dcs_read(dsi, MIPI_DCS_GET_POWER_MODE, mode,  in mipi_dsi_dcs_get_power_mode()
879  * @dsi: DSI peripheral device
884 int mipi_dsi_dcs_get_pixel_format(struct mipi_dsi_device *dsi, u8 *format)  in mipi_dsi_dcs_get_pixel_format()  argument
888 	err = mipi_dsi_dcs_read(dsi, MIPI_DCS_GET_PIXEL_FORMAT, format,  in mipi_dsi_dcs_get_pixel_format()
904  * @dsi: DSI peripheral device
908 int mipi_dsi_dcs_enter_sleep_mode(struct mipi_dsi_device *dsi)  in mipi_dsi_dcs_enter_sleep_mode()  argument
912 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_ENTER_SLEEP_MODE, NULL, 0);  in mipi_dsi_dcs_enter_sleep_mode()
923  * @dsi: DSI peripheral device
927 int mipi_dsi_dcs_exit_sleep_mode(struct mipi_dsi_device *dsi)  in mipi_dsi_dcs_exit_sleep_mode()  argument
931 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_EXIT_SLEEP_MODE, NULL, 0);  in mipi_dsi_dcs_exit_sleep_mode()
942  * @dsi: DSI peripheral device
946 int mipi_dsi_dcs_set_display_off(struct mipi_dsi_device *dsi)  in mipi_dsi_dcs_set_display_off()  argument
950 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_DISPLAY_OFF, NULL, 0);  in mipi_dsi_dcs_set_display_off()
961  * @dsi: DSI peripheral device
965 int mipi_dsi_dcs_set_display_on(struct mipi_dsi_device *dsi)  in mipi_dsi_dcs_set_display_on()  argument
969 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_DISPLAY_ON, NULL, 0);  in mipi_dsi_dcs_set_display_on()
980  * @dsi: DSI peripheral device
986 int mipi_dsi_dcs_set_column_address(struct mipi_dsi_device *dsi, u16 start,  in mipi_dsi_dcs_set_column_address()  argument
992 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_COLUMN_ADDRESS, payload,  in mipi_dsi_dcs_set_column_address()
1004  * @dsi: DSI peripheral device
1010 int mipi_dsi_dcs_set_page_address(struct mipi_dsi_device *dsi, u16 start,  in mipi_dsi_dcs_set_page_address()  argument
1016 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_PAGE_ADDRESS, payload,  in mipi_dsi_dcs_set_page_address()
1028  * @dsi: DSI peripheral device
1032 int mipi_dsi_dcs_set_tear_off(struct mipi_dsi_device *dsi)  in mipi_dsi_dcs_set_tear_off()  argument
1036 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_TEAR_OFF, NULL, 0);  in mipi_dsi_dcs_set_tear_off()
1047  * @dsi: DSI peripheral device
1052 int mipi_dsi_dcs_set_tear_on(struct mipi_dsi_device *dsi,  in mipi_dsi_dcs_set_tear_on()  argument
1058 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_TEAR_ON, &value,  in mipi_dsi_dcs_set_tear_on()
1070  * @dsi: DSI peripheral device
1075 int mipi_dsi_dcs_set_pixel_format(struct mipi_dsi_device *dsi, u8 format)  in mipi_dsi_dcs_set_pixel_format()  argument
1079 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_PIXEL_FORMAT, &format,  in mipi_dsi_dcs_set_pixel_format()
1091  * @dsi: DSI peripheral device
1096 int mipi_dsi_dcs_set_tear_scanline(struct mipi_dsi_device *dsi, u16 scanline)  in mipi_dsi_dcs_set_tear_scanline()  argument
1101 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_TEAR_SCANLINE, payload,  in mipi_dsi_dcs_set_tear_scanline()
1113  * @dsi: DSI peripheral device
1118 int mipi_dsi_dcs_set_display_brightness(struct mipi_dsi_device *dsi,  in mipi_dsi_dcs_set_display_brightness()  argument
1124 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_DISPLAY_BRIGHTNESS,  in mipi_dsi_dcs_set_display_brightness()
1136  * @dsi: DSI peripheral device
1141 int mipi_dsi_dcs_get_display_brightness(struct mipi_dsi_device *dsi,  in mipi_dsi_dcs_get_display_brightness()  argument
1146 	err = mipi_dsi_dcs_read(dsi, MIPI_DCS_GET_DISPLAY_BRIGHTNESS,  in mipi_dsi_dcs_get_display_brightness()
1162  * @dsi: DSI peripheral device
1167 int mipi_dsi_dcs_set_display_brightness_large(struct mipi_dsi_device *dsi,  in mipi_dsi_dcs_set_display_brightness_large()  argument
1173 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_DISPLAY_BRIGHTNESS,  in mipi_dsi_dcs_set_display_brightness_large()
1185  * @dsi: DSI peripheral device
1190 int mipi_dsi_dcs_get_display_brightness_large(struct mipi_dsi_device *dsi,  in mipi_dsi_dcs_get_display_brightness_large()  argument
1196 	err = mipi_dsi_dcs_read(dsi, MIPI_DCS_GET_DISPLAY_BRIGHTNESS,  in mipi_dsi_dcs_get_display_brightness_large()
1214 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev);  in mipi_dsi_drv_probe()  local
1216 	return drv->probe(dsi);  in mipi_dsi_drv_probe()
1222 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev);  in mipi_dsi_drv_remove()  local
1224 	return drv->remove(dsi);  in mipi_dsi_drv_remove()
1230 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev);  in mipi_dsi_drv_shutdown()  local
1232 	drv->shutdown(dsi);  in mipi_dsi_drv_shutdown()
1236  * mipi_dsi_driver_register_full() - register a driver for DSI devices
1237  * @drv: DSI driver structure
1260  * mipi_dsi_driver_unregister() - unregister a driver for DSI devices
1261  * @drv: DSI driver structure
1278 MODULE_DESCRIPTION("MIPI DSI Bus");