2  * Copyright © 2016-2017 Broadcom
8  * Portions of this file (derived from panel-simple.c) are:
25  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
36  * TC358762XBG DSI-DPI bridge, and an I2C-connected Atmel ATTINY88-MUR
40  * This driver controls the TC358762 and ATTINY88, presenting a DSI
47 #include <linux/media-bus-format.h>
58 #define RPI_DSI_DRIVER_NAME "rpi-ts-dsi"
83 /* DSI D-PHY Layer Registers */
94 /* DSI PPI Layer Registers */
118 /* DSI Protocol Layer Registers */
140 /* DSI General Registers */
144 /* DSI Application Layer Registers */
161 /* DBI-B Host Registers */
164 /* SPI Master Registers */
193 	struct mipi_dsi_device *dsi;  member
200 		 * plugged in and clock re-computed from that.
221 	return i2c_smbus_read_byte_data(ts->i2c, reg);  in rpi_touchscreen_i2c_read()
229 	ret = i2c_smbus_write_byte_data(ts->i2c, reg, val);  in rpi_touchscreen_i2c_write()
231 		dev_err(&ts->i2c->dev, "I2C write failed: %d\n", ret);  in rpi_touchscreen_i2c_write()
245 	mipi_dsi_generic_write(ts->dsi, msg, sizeof(msg));  in rpi_touchscreen_write()
327 		mode = drm_mode_duplicate(connector->dev, m);  in rpi_touchscreen_get_modes()
329 			dev_err(panel->dev, "failed to add mode %ux%u@%u\n",  in rpi_touchscreen_get_modes()
330 				m->hdisplay, m->vdisplay,  in rpi_touchscreen_get_modes()
335 		mode->type |= DRM_MODE_TYPE_DRIVER;  in rpi_touchscreen_get_modes()
338 			mode->type |= DRM_MODE_TYPE_PREFERRED;  in rpi_touchscreen_get_modes()
346 	connector->display_info.bpc = 8;  in rpi_touchscreen_get_modes()
347 	connector->display_info.width_mm = 154;  in rpi_touchscreen_get_modes()
348 	connector->display_info.height_mm = 86;  in rpi_touchscreen_get_modes()
349 	drm_display_info_set_bus_formats(&connector->display_info,  in rpi_touchscreen_get_modes()
365 	struct device *dev = &i2c->dev;  in rpi_touchscreen_probe()
378 		return -ENOMEM;  in rpi_touchscreen_probe()
382 	ts->i2c = i2c;  in rpi_touchscreen_probe()
387 		return -ENODEV;  in rpi_touchscreen_probe()
396 		return -ENODEV;  in rpi_touchscreen_probe()
402 	/* Look up the DSI host.  It needs to probe before we do. */  in rpi_touchscreen_probe()
403 	endpoint = of_graph_get_endpoint_by_regs(dev->of_node, 0, -1);  in rpi_touchscreen_probe()
405 		return -ENODEV;  in rpi_touchscreen_probe()
415 		return -EPROBE_DEFER;  in rpi_touchscreen_probe()
424 	ts->dsi = mipi_dsi_device_register_full(host, &info);  in rpi_touchscreen_probe()
425 	if (IS_ERR(ts->dsi)) {  in rpi_touchscreen_probe()
426 		dev_err(dev, "DSI device registration failed: %ld\n",  in rpi_touchscreen_probe()
427 			PTR_ERR(ts->dsi));  in rpi_touchscreen_probe()
428 		return PTR_ERR(ts->dsi);  in rpi_touchscreen_probe()
431 	drm_panel_init(&ts->base, dev, &rpi_touchscreen_funcs,  in rpi_touchscreen_probe()
434 	/* This appears last, as it's what will unblock the DSI host  in rpi_touchscreen_probe()
437 	drm_panel_add(&ts->base);  in rpi_touchscreen_probe()
443 	return -ENODEV;  in rpi_touchscreen_probe()
450 	mipi_dsi_detach(ts->dsi);  in rpi_touchscreen_remove()
452 	drm_panel_remove(&ts->base);  in rpi_touchscreen_remove()
454 	mipi_dsi_device_unregister(ts->dsi);  in rpi_touchscreen_remove()
457 static int rpi_touchscreen_dsi_probe(struct mipi_dsi_device *dsi)  in rpi_touchscreen_dsi_probe()  argument
461 	dsi->mode_flags = (MIPI_DSI_MODE_VIDEO |  in rpi_touchscreen_dsi_probe()
464 	dsi->format = MIPI_DSI_FMT_RGB888;  in rpi_touchscreen_dsi_probe()
465 	dsi->lanes = 1;  in rpi_touchscreen_dsi_probe()
467 	ret = mipi_dsi_attach(dsi);  in rpi_touchscreen_dsi_probe()
470 		dev_err(&dsi->dev, "failed to attach dsi to host: %d\n", ret);  in rpi_touchscreen_dsi_probe()
481 	{ .compatible = "raspberrypi,7inch-touchscreen-panel" },
510 MODULE_DESCRIPTION("Raspberry Pi 7-inch touchscreen driver");