2  * MIPI DSI Bus
39  * DOC: dsi helpers
41  * These functions contain some common logic and helpers to deal with MIPI DSI
44  * Helpers are provided for a number of standard MIPI DSI command as well as a
50 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev);  in mipi_dsi_device_match()  local
56 	/* compare DSI device and driver names */  in mipi_dsi_device_match()
57 	if (!strcmp(dsi->name, drv->name))  in mipi_dsi_device_match()
65 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev);  in mipi_dsi_uevent()  local
73 		       dsi->name);  in mipi_dsi_uevent()
90 	.name = "mipi-dsi",
102  * of_find_mipi_dsi_device_by_node() - find the MIPI DSI device matching a
106  * Return: A pointer to the MIPI DSI device corresponding to @np or NULL if no
121 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev);  in mipi_dsi_dev_release()  local
124 	kfree(dsi);  in mipi_dsi_dev_release()
133 	struct mipi_dsi_device *dsi;  in mipi_dsi_device_alloc()  local
135 	dsi = kzalloc(sizeof(*dsi), GFP_KERNEL);  in mipi_dsi_device_alloc()
136 	if (!dsi)  in mipi_dsi_device_alloc()
139 	dsi->host = host;  in mipi_dsi_device_alloc()
140 	dsi->dev.bus = &mipi_dsi_bus_type;  in mipi_dsi_device_alloc()
141 	dsi->dev.parent = host->dev;  in mipi_dsi_device_alloc()
142 	dsi->dev.type = &mipi_dsi_device_type;  in mipi_dsi_device_alloc()
144 	device_initialize(&dsi->dev);  in mipi_dsi_device_alloc()
146 	return dsi;  in mipi_dsi_device_alloc()
149 static int mipi_dsi_device_add(struct mipi_dsi_device *dsi)  in mipi_dsi_device_add()  argument
151 	struct mipi_dsi_host *host = dsi->host;  in mipi_dsi_device_add()
153 	dev_set_name(&dsi->dev, "%s.%d", dev_name(host->dev),  dsi->channel);  in mipi_dsi_device_add()
155 	return device_add(&dsi->dev);  in mipi_dsi_device_add()
193  * mipi_dsi_device_register_full - create a MIPI DSI device
194  * @host: DSI host to which this device is connected
195  * @info: pointer to template containing DSI device information
197  * Create a MIPI DSI device by using the device information provided by
201  * A pointer to the newly created MIPI DSI device, or, a pointer encoded
208 	struct mipi_dsi_device *dsi;  in mipi_dsi_device_register_full()  local
222 	dsi = mipi_dsi_device_alloc(host);  in mipi_dsi_device_register_full()
223 	if (IS_ERR(dsi)) {  in mipi_dsi_device_register_full()
224 		dev_err(dev, "failed to allocate DSI device %ld\n",  in mipi_dsi_device_register_full()
225 			PTR_ERR(dsi));  in mipi_dsi_device_register_full()
226 		return dsi;  in mipi_dsi_device_register_full()
229 	dsi->dev.of_node = info->node;  in mipi_dsi_device_register_full()
230 	dsi->channel = info->channel;  in mipi_dsi_device_register_full()
231 	strlcpy(dsi->name, info->type, sizeof(dsi->name));  in mipi_dsi_device_register_full()
233 	ret = mipi_dsi_device_add(dsi);  in mipi_dsi_device_register_full()
235 		dev_err(dev, "failed to add DSI device %d\n", ret);  in mipi_dsi_device_register_full()
236 		kfree(dsi);  in mipi_dsi_device_register_full()
240 	return dsi;  in mipi_dsi_device_register_full()
245  * mipi_dsi_device_unregister - unregister MIPI DSI device
246  * @dsi: DSI peripheral device
248 void mipi_dsi_device_unregister(struct mipi_dsi_device *dsi)  in mipi_dsi_device_unregister()  argument
250 	device_unregister(&dsi->dev);  in mipi_dsi_device_unregister()
258  * of_find_mipi_dsi_host_by_node() - find the MIPI DSI host matching a
263  * A pointer to the MIPI DSI host corresponding to @node or NULL if no
306 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev);  in mipi_dsi_remove_device_fn()  local
308 	mipi_dsi_device_unregister(dsi);  in mipi_dsi_remove_device_fn()
324  * mipi_dsi_attach - attach a DSI device to its DSI host
325  * @dsi: DSI peripheral
327 int mipi_dsi_attach(struct mipi_dsi_device *dsi)  in mipi_dsi_attach()  argument
329 	const struct mipi_dsi_host_ops *ops = dsi->host->ops;  in mipi_dsi_attach()
334 	return ops->attach(dsi->host, dsi);  in mipi_dsi_attach()
339  * mipi_dsi_detach - detach a DSI device from its DSI host
340  * @dsi: DSI peripheral
342 int mipi_dsi_detach(struct mipi_dsi_device *dsi)  in mipi_dsi_detach()  argument
344 	const struct mipi_dsi_host_ops *ops = dsi->host->ops;  in mipi_dsi_detach()
349 	return ops->detach(dsi->host, dsi);  in mipi_dsi_detach()
353 static ssize_t mipi_dsi_device_transfer(struct mipi_dsi_device *dsi,  in mipi_dsi_device_transfer()  argument
356 	const struct mipi_dsi_host_ops *ops = dsi->host->ops;  in mipi_dsi_device_transfer()
361 	if (dsi->mode_flags & MIPI_DSI_MODE_LPM)  in mipi_dsi_device_transfer()
364 	return ops->transfer(dsi->host, msg);  in mipi_dsi_device_transfer()
369  * @type: MIPI DSI data type of the packet
406  * @type: MIPI DSI data type of the packet
438  *     DSI protocol
439  * @packet: pointer to a DSI packet structure
491  * @dsi: DSI peripheral device
495 int mipi_dsi_shutdown_peripheral(struct mipi_dsi_device *dsi)  in mipi_dsi_shutdown_peripheral()  argument
498 		.channel = dsi->channel,  in mipi_dsi_shutdown_peripheral()
503 	int ret = mipi_dsi_device_transfer(dsi, &msg);  in mipi_dsi_shutdown_peripheral()
511  * @dsi: DSI peripheral device
515 int mipi_dsi_turn_on_peripheral(struct mipi_dsi_device *dsi)  in mipi_dsi_turn_on_peripheral()  argument
518 		.channel = dsi->channel,  in mipi_dsi_turn_on_peripheral()
523 	int ret = mipi_dsi_device_transfer(dsi, &msg);  in mipi_dsi_turn_on_peripheral()
533  * @dsi: DSI peripheral device
538 int mipi_dsi_set_maximum_return_packet_size(struct mipi_dsi_device *dsi,  in mipi_dsi_set_maximum_return_packet_size()  argument
543 		.channel = dsi->channel,  in mipi_dsi_set_maximum_return_packet_size()
548 	int ret = mipi_dsi_device_transfer(dsi, &msg);  in mipi_dsi_set_maximum_return_packet_size()
556  * @dsi: DSI peripheral device
566 ssize_t mipi_dsi_generic_write(struct mipi_dsi_device *dsi, const void *payload,  in mipi_dsi_generic_write()  argument
570 		.channel = dsi->channel,  in mipi_dsi_generic_write()
593 	return mipi_dsi_device_transfer(dsi, &msg);  in mipi_dsi_generic_write()
599  * @dsi: DSI peripheral device
611 ssize_t mipi_dsi_generic_read(struct mipi_dsi_device *dsi, const void *params,  in mipi_dsi_generic_read()  argument
615 		.channel = dsi->channel,  in mipi_dsi_generic_read()
639 	return mipi_dsi_device_transfer(dsi, &msg);  in mipi_dsi_generic_read()
645  * @dsi: DSI peripheral device
655 ssize_t mipi_dsi_dcs_write_buffer(struct mipi_dsi_device *dsi,  in mipi_dsi_dcs_write_buffer()  argument
659 		.channel = dsi->channel,  in mipi_dsi_dcs_write_buffer()
681 	return mipi_dsi_device_transfer(dsi, &msg);  in mipi_dsi_dcs_write_buffer()
687  * @dsi: DSI peripheral device
698 ssize_t mipi_dsi_dcs_write(struct mipi_dsi_device *dsi, u8 cmd,  in mipi_dsi_dcs_write()  argument
720 	err = mipi_dsi_dcs_write_buffer(dsi, tx, size);  in mipi_dsi_dcs_write()
731  * @dsi: DSI peripheral device
738 ssize_t mipi_dsi_dcs_read(struct mipi_dsi_device *dsi, u8 cmd, void *data,  in mipi_dsi_dcs_read()  argument
742 		.channel = dsi->channel,  in mipi_dsi_dcs_read()
750 	return mipi_dsi_device_transfer(dsi, &msg);  in mipi_dsi_dcs_read()
756  * @dsi: DSI peripheral device
760 int mipi_dsi_dcs_nop(struct mipi_dsi_device *dsi)  in mipi_dsi_dcs_nop()  argument
764 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_NOP, NULL, 0);  in mipi_dsi_dcs_nop()
774  * @dsi: DSI peripheral device
778 int mipi_dsi_dcs_soft_reset(struct mipi_dsi_device *dsi)  in mipi_dsi_dcs_soft_reset()  argument
782 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SOFT_RESET, NULL, 0);  in mipi_dsi_dcs_soft_reset()
793  * @dsi: DSI peripheral device
798 int mipi_dsi_dcs_get_power_mode(struct mipi_dsi_device *dsi, u8 *mode)  in mipi_dsi_dcs_get_power_mode()  argument
802 	err = mipi_dsi_dcs_read(dsi, MIPI_DCS_GET_POWER_MODE, mode,  in mipi_dsi_dcs_get_power_mode()
818  * @dsi: DSI peripheral device
823 int mipi_dsi_dcs_get_pixel_format(struct mipi_dsi_device *dsi, u8 *format)  in mipi_dsi_dcs_get_pixel_format()  argument
827 	err = mipi_dsi_dcs_read(dsi, MIPI_DCS_GET_PIXEL_FORMAT, format,  in mipi_dsi_dcs_get_pixel_format()
843  * @dsi: DSI peripheral device
847 int mipi_dsi_dcs_enter_sleep_mode(struct mipi_dsi_device *dsi)  in mipi_dsi_dcs_enter_sleep_mode()  argument
851 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_ENTER_SLEEP_MODE, NULL, 0);  in mipi_dsi_dcs_enter_sleep_mode()
862  * @dsi: DSI peripheral device
866 int mipi_dsi_dcs_exit_sleep_mode(struct mipi_dsi_device *dsi)  in mipi_dsi_dcs_exit_sleep_mode()  argument
870 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_EXIT_SLEEP_MODE, NULL, 0);  in mipi_dsi_dcs_exit_sleep_mode()
881  * @dsi: DSI peripheral device
885 int mipi_dsi_dcs_set_display_off(struct mipi_dsi_device *dsi)  in mipi_dsi_dcs_set_display_off()  argument
889 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_DISPLAY_OFF, NULL, 0);  in mipi_dsi_dcs_set_display_off()
900  * @dsi: DSI peripheral device
904 int mipi_dsi_dcs_set_display_on(struct mipi_dsi_device *dsi)  in mipi_dsi_dcs_set_display_on()  argument
908 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_DISPLAY_ON, NULL, 0);  in mipi_dsi_dcs_set_display_on()
919  * @dsi: DSI peripheral device
925 int mipi_dsi_dcs_set_column_address(struct mipi_dsi_device *dsi, u16 start,  in mipi_dsi_dcs_set_column_address()  argument
931 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_COLUMN_ADDRESS, payload,  in mipi_dsi_dcs_set_column_address()
943  * @dsi: DSI peripheral device
949 int mipi_dsi_dcs_set_page_address(struct mipi_dsi_device *dsi, u16 start,  in mipi_dsi_dcs_set_page_address()  argument
955 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_PAGE_ADDRESS, payload,  in mipi_dsi_dcs_set_page_address()
967  * @dsi: DSI peripheral device
971 int mipi_dsi_dcs_set_tear_off(struct mipi_dsi_device *dsi)  in mipi_dsi_dcs_set_tear_off()  argument
975 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_TEAR_OFF, NULL, 0);  in mipi_dsi_dcs_set_tear_off()
986  * @dsi: DSI peripheral device
991 int mipi_dsi_dcs_set_tear_on(struct mipi_dsi_device *dsi,  in mipi_dsi_dcs_set_tear_on()  argument
997 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_TEAR_ON, &value,  in mipi_dsi_dcs_set_tear_on()
1009  * @dsi: DSI peripheral device
1014 int mipi_dsi_dcs_set_pixel_format(struct mipi_dsi_device *dsi, u8 format)  in mipi_dsi_dcs_set_pixel_format()  argument
1018 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_PIXEL_FORMAT, &format,  in mipi_dsi_dcs_set_pixel_format()
1030  * @dsi: DSI peripheral device
1035 int mipi_dsi_dcs_set_tear_scanline(struct mipi_dsi_device *dsi, u16 scanline)  in mipi_dsi_dcs_set_tear_scanline()  argument
1040 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_TEAR_SCANLINE, payload,  in mipi_dsi_dcs_set_tear_scanline()
1052  * @dsi: DSI peripheral device
1057 int mipi_dsi_dcs_set_display_brightness(struct mipi_dsi_device *dsi,  in mipi_dsi_dcs_set_display_brightness()  argument
1063 	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_DISPLAY_BRIGHTNESS,  in mipi_dsi_dcs_set_display_brightness()
1075  * @dsi: DSI peripheral device
1080 int mipi_dsi_dcs_get_display_brightness(struct mipi_dsi_device *dsi,  in mipi_dsi_dcs_get_display_brightness()  argument
1085 	err = mipi_dsi_dcs_read(dsi, MIPI_DCS_GET_DISPLAY_BRIGHTNESS,  in mipi_dsi_dcs_get_display_brightness()
1101 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev);  in mipi_dsi_drv_probe()  local
1103 	return drv->probe(dsi);  in mipi_dsi_drv_probe()
1109 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev);  in mipi_dsi_drv_remove()  local
1111 	return drv->remove(dsi);  in mipi_dsi_drv_remove()
1117 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev);  in mipi_dsi_drv_shutdown()  local
1119 	drv->shutdown(dsi);  in mipi_dsi_drv_shutdown()
1123  * mipi_dsi_driver_register_full() - register a driver for DSI devices
1124  * @drv: DSI driver structure
1147  * mipi_dsi_driver_unregister() - unregister a driver for DSI devices
1148  * @drv: DSI driver structure
1165 MODULE_DESCRIPTION("MIPI DSI Bus");