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
59 #define RPI_DSI_DRIVER_NAME "rpi-ts-dsi"
84 /* DSI D-PHY Layer Registers */
154 /* LCDC/DPI Host Registers */
162 /* DBI-B Host Registers */
201 		 * plugged in and clock re-computed from that.
215 static struct rpi_touchscreen *panel_to_ts(struct drm_panel *panel)  in panel_to_ts()  argument
217 	return container_of(panel, struct rpi_touchscreen, base);  in panel_to_ts()
222 	return i2c_smbus_read_byte_data(ts->i2c, reg);  in rpi_touchscreen_i2c_read()
230 	ret = i2c_smbus_write_byte_data(ts->i2c, reg, val);  in rpi_touchscreen_i2c_write()
232 		dev_err(&ts->dsi->dev, "I2C write failed: %d\n", ret);  in rpi_touchscreen_i2c_write()
246 	mipi_dsi_generic_write(ts->dsi, msg, sizeof(msg));  in rpi_touchscreen_write()
251 static int rpi_touchscreen_disable(struct drm_panel *panel)  in rpi_touchscreen_disable()  argument
253 	struct rpi_touchscreen *ts = panel_to_ts(panel);  in rpi_touchscreen_disable()
263 static int rpi_touchscreen_noop(struct drm_panel *panel)  in rpi_touchscreen_noop()  argument
268 static int rpi_touchscreen_enable(struct drm_panel *panel)  in rpi_touchscreen_enable()  argument
270 	struct rpi_touchscreen *ts = panel_to_ts(panel);  in rpi_touchscreen_enable()
302 	 * firmware used for the panel.  Runtime rotation  in rpi_touchscreen_enable()
311 static int rpi_touchscreen_get_modes(struct drm_panel *panel,  in rpi_touchscreen_get_modes()  argument
321 		mode = drm_mode_duplicate(connector->dev, m);  in rpi_touchscreen_get_modes()
323 			dev_err(panel->dev, "failed to add mode %ux%u@%u\n",  in rpi_touchscreen_get_modes()
324 				m->hdisplay, m->vdisplay,  in rpi_touchscreen_get_modes()
329 		mode->type |= DRM_MODE_TYPE_DRIVER;  in rpi_touchscreen_get_modes()
332 			mode->type |= DRM_MODE_TYPE_PREFERRED;  in rpi_touchscreen_get_modes()
340 	connector->display_info.bpc = 8;  in rpi_touchscreen_get_modes()
341 	connector->display_info.width_mm = 154;  in rpi_touchscreen_get_modes()
342 	connector->display_info.height_mm = 86;  in rpi_touchscreen_get_modes()
343 	drm_display_info_set_bus_formats(&connector->display_info,  in rpi_touchscreen_get_modes()
360 	struct device *dev = &i2c->dev;  in rpi_touchscreen_probe()
373 		return -ENOMEM;  in rpi_touchscreen_probe()
377 	ts->i2c = i2c;  in rpi_touchscreen_probe()
382 		return -ENODEV;  in rpi_touchscreen_probe()
391 		return -ENODEV;  in rpi_touchscreen_probe()
398 	endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);  in rpi_touchscreen_probe()
400 		return -ENODEV;  in rpi_touchscreen_probe()
410 		return -EPROBE_DEFER;  in rpi_touchscreen_probe()
419 	ts->dsi = mipi_dsi_device_register_full(host, &info);  in rpi_touchscreen_probe()
420 	if (IS_ERR(ts->dsi)) {  in rpi_touchscreen_probe()
422 			PTR_ERR(ts->dsi));  in rpi_touchscreen_probe()
423 		return PTR_ERR(ts->dsi);  in rpi_touchscreen_probe()
426 	drm_panel_init(&ts->base, dev, &rpi_touchscreen_funcs,  in rpi_touchscreen_probe()
432 	drm_panel_add(&ts->base);  in rpi_touchscreen_probe()
438 	return -ENODEV;  in rpi_touchscreen_probe()
445 	mipi_dsi_detach(ts->dsi);  in rpi_touchscreen_remove()
447 	drm_panel_remove(&ts->base);  in rpi_touchscreen_remove()
449 	mipi_dsi_device_unregister(ts->dsi);  in rpi_touchscreen_remove()
450 	kfree(ts->dsi);  in rpi_touchscreen_remove()
459 	dsi->mode_flags = (MIPI_DSI_MODE_VIDEO |  in rpi_touchscreen_dsi_probe()
462 	dsi->format = MIPI_DSI_FMT_RGB888;  in rpi_touchscreen_dsi_probe()
463 	dsi->lanes = 1;  in rpi_touchscreen_dsi_probe()
468 		dev_err(&dsi->dev, "failed to attach dsi to host: %d\n", ret);  in rpi_touchscreen_dsi_probe()
479 	{ .compatible = "raspberrypi,7inch-touchscreen-panel" },
508 MODULE_DESCRIPTION("Raspberry Pi 7-inch touchscreen driver");