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
33  * Raspberry Pi 7" touchscreen panel driver.
35  * The 7" touchscreen consists of a DPI LCD panel, a Toshiba
36  * TC358762XBG DSI-DPI bridge, and an I2C-connected Atmel ATTINY88-MUR
47 #include <linux/media-bus-format.h>
58 #define RPI_DSI_DRIVER_NAME "rpi-ts-dsi"
83 /* DSI D-PHY Layer Registers */
153 /* LCDC/DPI Host Registers */
161 /* DBI-B Host Registers */
200 		 * plugged in and clock re-computed from that.
214 static struct rpi_touchscreen *panel_to_ts(struct drm_panel *panel)  in panel_to_ts()  argument
216 	return container_of(panel, struct rpi_touchscreen, base);  in panel_to_ts()
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()
250 static int rpi_touchscreen_disable(struct drm_panel *panel)  in rpi_touchscreen_disable()  argument
252 	struct rpi_touchscreen *ts = panel_to_ts(panel);  in rpi_touchscreen_disable()
262 static int rpi_touchscreen_noop(struct drm_panel *panel)  in rpi_touchscreen_noop()  argument
267 static int rpi_touchscreen_prepare(struct drm_panel *panel)  in rpi_touchscreen_prepare()  argument
269 	struct rpi_touchscreen *ts = panel_to_ts(panel);  in rpi_touchscreen_prepare()
300 static int rpi_touchscreen_enable(struct drm_panel *panel)  in rpi_touchscreen_enable()  argument
302 	struct rpi_touchscreen *ts = panel_to_ts(panel);  in rpi_touchscreen_enable()
308 	 * firmware used for the panel.  Runtime rotation  in rpi_touchscreen_enable()
317 static int rpi_touchscreen_get_modes(struct drm_panel *panel,  in rpi_touchscreen_get_modes()  argument
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()
403 	endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);  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()
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()
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()
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()
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");