1 // SPDX-License-Identifier: GPL-2.0
3  * Panel driver for the ARM Versatile family reference designs from
9  * On the Versatile AB, these panels come mounted on daughterboards
14  * - The IB1 is a passive board where the display connector defines a
19  * - The IB2 is a more complex board intended for GSM phone development
49 /* The Versatile can detect the connected panel type */
64  * struct versatile_panel_type - lookup struct for the supported panels
68 	 * @name: the name of this panel
76 	 * @mode: the DRM display mode for this panel
80 	 * @bus_flags: the DRM bus flags for this panel e.g. inverted clock
84 	 * @width_mm: the panel width in mm
88 	 * @height_mm: the panel height in mm
92 	 * @ib2: the panel may be connected on an IB2 daughterboard
98  * struct versatile_panel - state container for the Versatile panels
106 	 * @panel: the DRM panel instance for this device
108 	struct drm_panel panel;  member
110 	 * @panel_type: the Versatile panel type as detected
125 	 * Sanyo TM38QV67A02A - 3.8 inch QVGA (320x240) Color TFT
173 	 * Epson L2F50113T00 - 2.2 inch QCIF 176x220 Color TFT
224 to_versatile_panel(struct drm_panel *panel)  in to_versatile_panel()  argument
226 	return container_of(panel, struct versatile_panel, panel);  in to_versatile_panel()
229 static int versatile_panel_disable(struct drm_panel *panel)  in versatile_panel_disable()  argument
231 	struct versatile_panel *vpanel = to_versatile_panel(panel);  in versatile_panel_disable()
234 	if (vpanel->ib2_map) {  in versatile_panel_disable()
235 		dev_dbg(vpanel->dev, "disable IB2 display\n");  in versatile_panel_disable()
236 		regmap_update_bits(vpanel->ib2_map,  in versatile_panel_disable()
245 static int versatile_panel_enable(struct drm_panel *panel)  in versatile_panel_enable()  argument
247 	struct versatile_panel *vpanel = to_versatile_panel(panel);  in versatile_panel_enable()
250 	if (vpanel->ib2_map) {  in versatile_panel_enable()
251 		dev_dbg(vpanel->dev, "enable IB2 display\n");  in versatile_panel_enable()
252 		regmap_update_bits(vpanel->ib2_map,  in versatile_panel_enable()
261 static int versatile_panel_get_modes(struct drm_panel *panel)  in versatile_panel_get_modes()  argument
263 	struct drm_connector *connector = panel->connector;  in versatile_panel_get_modes()
264 	struct versatile_panel *vpanel = to_versatile_panel(panel);  in versatile_panel_get_modes()
267 	strncpy(connector->display_info.name, vpanel->panel_type->name,  in versatile_panel_get_modes()
269 	connector->display_info.width_mm = vpanel->panel_type->width_mm;  in versatile_panel_get_modes()
270 	connector->display_info.height_mm = vpanel->panel_type->height_mm;  in versatile_panel_get_modes()
271 	connector->display_info.bus_flags = vpanel->panel_type->bus_flags;  in versatile_panel_get_modes()
273 	mode = drm_mode_duplicate(panel->drm, &vpanel->panel_type->mode);  in versatile_panel_get_modes()
275 	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;  in versatile_panel_get_modes()
277 	mode->width_mm = vpanel->panel_type->width_mm;  in versatile_panel_get_modes()
278 	mode->height_mm = vpanel->panel_type->height_mm;  in versatile_panel_get_modes()
292 	struct device *dev = &pdev->dev;  in versatile_panel_probe()
300 	parent = dev->parent;  in versatile_panel_probe()
302 		dev_err(dev, "no parent for versatile panel\n");  in versatile_panel_probe()
303 		return -ENODEV;  in versatile_panel_probe()
305 	map = syscon_node_to_regmap(parent->of_node);  in versatile_panel_probe()
307 		dev_err(dev, "no regmap for versatile panel parent\n");  in versatile_panel_probe()
313 		return -ENOMEM;  in versatile_panel_probe()
327 		if (pt->magic == val) {  in versatile_panel_probe()
328 			vpanel->panel_type = pt;  in versatile_panel_probe()
333 	/* No panel detected or VGA, let's leave this show */  in versatile_panel_probe()
335 		dev_info(dev, "no panel detected\n");  in versatile_panel_probe()
336 		return -ENODEV;  in versatile_panel_probe()
339 	dev_info(dev, "detected: %s\n", vpanel->panel_type->name);  in versatile_panel_probe()
340 	vpanel->dev = dev;  in versatile_panel_probe()
341 	vpanel->map = map;  in versatile_panel_probe()
343 	/* Check if the panel is mounted on an IB2 daughterboard */  in versatile_panel_probe()
344 	if (vpanel->panel_type->ib2) {  in versatile_panel_probe()
345 		vpanel->ib2_map = syscon_regmap_lookup_by_compatible(  in versatile_panel_probe()
346 			"arm,versatile-ib2-syscon");  in versatile_panel_probe()
347 		if (IS_ERR(vpanel->ib2_map))  in versatile_panel_probe()
348 			vpanel->ib2_map = NULL;  in versatile_panel_probe()
350 			dev_info(dev, "panel mounted on IB2 daughterboard\n");  in versatile_panel_probe()
353 	drm_panel_init(&vpanel->panel);  in versatile_panel_probe()
354 	vpanel->panel.dev = dev;  in versatile_panel_probe()
355 	vpanel->panel.funcs = &versatile_panel_drm_funcs;  in versatile_panel_probe()
357 	return drm_panel_add(&vpanel->panel);  in versatile_panel_probe()
361 	{ .compatible = "arm,versatile-tft-panel", },
369 		.name	= "versatile-tft-panel",
376 MODULE_DESCRIPTION("ARM Versatile panel driver");