1 // SPDX-License-Identifier: GPL-2.0+
8 #include <linux/media-bus-format.h>
23 #include <dt-bindings/firmware/imx/rsrc.h>
33 #define DRIVER_NAME	"imx8qxp-pxl2dpi"
53 	struct imx8qxp_pxl2dpi *p2d = bridge->driver_private;  in imx8qxp_pxl2dpi_bridge_attach()
56 		DRM_DEV_ERROR(p2d->dev,  in imx8qxp_pxl2dpi_bridge_attach()
58 		return -EINVAL;  in imx8qxp_pxl2dpi_bridge_attach()
61 	if (!bridge->encoder) {  in imx8qxp_pxl2dpi_bridge_attach()
62 		DRM_DEV_ERROR(p2d->dev, "missing encoder\n");  in imx8qxp_pxl2dpi_bridge_attach()
63 		return -ENODEV;  in imx8qxp_pxl2dpi_bridge_attach()
66 	return drm_bridge_attach(bridge->encoder,  in imx8qxp_pxl2dpi_bridge_attach()
67 				 p2d->next_bridge, bridge,  in imx8qxp_pxl2dpi_bridge_attach()
77 	struct imx8qxp_pxl2dpi *p2d = bridge->driver_private;  in imx8qxp_pxl2dpi_bridge_atomic_check()
79 	p2d->in_bus_format = bridge_state->input_bus_cfg.format;  in imx8qxp_pxl2dpi_bridge_atomic_check()
80 	p2d->out_bus_format = bridge_state->output_bus_cfg.format;  in imx8qxp_pxl2dpi_bridge_atomic_check()
90 	struct imx8qxp_pxl2dpi *p2d = bridge->driver_private;  in imx8qxp_pxl2dpi_bridge_mode_set()
94 	ret = pm_runtime_get_sync(p2d->dev);  in imx8qxp_pxl2dpi_bridge_mode_set()
96 		DRM_DEV_ERROR(p2d->dev,  in imx8qxp_pxl2dpi_bridge_mode_set()
99 	ret = imx_sc_misc_set_control(p2d->ipc_handle, p2d->sc_resource,  in imx8qxp_pxl2dpi_bridge_mode_set()
100 				      IMX_SC_C_PXL_LINK_SEL, p2d->pl_sel);  in imx8qxp_pxl2dpi_bridge_mode_set()
102 		DRM_DEV_ERROR(p2d->dev,  in imx8qxp_pxl2dpi_bridge_mode_set()
103 			      "failed to set pixel link selection(%u): %d\n",  in imx8qxp_pxl2dpi_bridge_mode_set()
104 							p2d->pl_sel, ret);  in imx8qxp_pxl2dpi_bridge_mode_set()
106 	switch (p2d->out_bus_format) {  in imx8qxp_pxl2dpi_bridge_mode_set()
108 		regmap_write(p2d->regmap, PXL2DPI_CTRL, CFG_24BIT);  in imx8qxp_pxl2dpi_bridge_mode_set()
111 		regmap_write(p2d->regmap, PXL2DPI_CTRL, CFG2_18BIT);  in imx8qxp_pxl2dpi_bridge_mode_set()
114 		DRM_DEV_ERROR(p2d->dev,  in imx8qxp_pxl2dpi_bridge_mode_set()
116 							p2d->out_bus_format);  in imx8qxp_pxl2dpi_bridge_mode_set()
119 	if (p2d->companion) {  in imx8qxp_pxl2dpi_bridge_mode_set()
120 		companion_p2d = bridge_to_p2d(p2d->companion);  in imx8qxp_pxl2dpi_bridge_mode_set()
122 		companion_p2d->in_bus_format = p2d->in_bus_format;  in imx8qxp_pxl2dpi_bridge_mode_set()
123 		companion_p2d->out_bus_format = p2d->out_bus_format;  in imx8qxp_pxl2dpi_bridge_mode_set()
125 		p2d->companion->funcs->mode_set(p2d->companion, mode,  in imx8qxp_pxl2dpi_bridge_mode_set()
134 	struct imx8qxp_pxl2dpi *p2d = bridge->driver_private;  in imx8qxp_pxl2dpi_bridge_atomic_disable()
137 	ret = pm_runtime_put(p2d->dev);  in imx8qxp_pxl2dpi_bridge_atomic_disable()
139 		DRM_DEV_ERROR(p2d->dev, "failed to put runtime PM: %d\n", ret);  in imx8qxp_pxl2dpi_bridge_atomic_disable()
141 	if (p2d->companion)  in imx8qxp_pxl2dpi_bridge_atomic_disable()
142 		p2d->companion->funcs->atomic_disable(p2d->companion,  in imx8qxp_pxl2dpi_bridge_atomic_disable()
231 	port = of_graph_get_port_by_id(p2d->dev->of_node, port_id);  in imx8qxp_pxl2dpi_get_available_ep_from_port()
233 		DRM_DEV_ERROR(p2d->dev, "failed to get port@%u\n", port_id);  in imx8qxp_pxl2dpi_get_available_ep_from_port()
234 		return ERR_PTR(-ENODEV);  in imx8qxp_pxl2dpi_get_available_ep_from_port()
239 		DRM_DEV_ERROR(p2d->dev, "no available endpoints of port@%u\n",  in imx8qxp_pxl2dpi_get_available_ep_from_port()
241 		ep = ERR_PTR(-ENODEV);  in imx8qxp_pxl2dpi_get_available_ep_from_port()
244 		DRM_DEV_ERROR(p2d->dev,  in imx8qxp_pxl2dpi_get_available_ep_from_port()
247 		ep = ERR_PTR(-EINVAL);  in imx8qxp_pxl2dpi_get_available_ep_from_port()
253 		DRM_DEV_ERROR(p2d->dev,  in imx8qxp_pxl2dpi_get_available_ep_from_port()
256 		ep = ERR_PTR(-ENODEV);  in imx8qxp_pxl2dpi_get_available_ep_from_port()
279 		DRM_DEV_ERROR(p2d->dev, "no available remote\n");  in imx8qxp_pxl2dpi_find_next_bridge()
280 		next_bridge = ERR_PTR(-ENODEV);  in imx8qxp_pxl2dpi_find_next_bridge()
282 	} else if (!of_device_is_available(remote->parent)) {  in imx8qxp_pxl2dpi_find_next_bridge()
283 		DRM_DEV_ERROR(p2d->dev, "remote parent is not available\n");  in imx8qxp_pxl2dpi_find_next_bridge()
284 		next_bridge = ERR_PTR(-ENODEV);  in imx8qxp_pxl2dpi_find_next_bridge()
290 		next_bridge = ERR_PTR(-EPROBE_DEFER);  in imx8qxp_pxl2dpi_find_next_bridge()
312 		DRM_DEV_ERROR(p2d->dev,  in imx8qxp_pxl2dpi_set_pixel_link_sel()
317 	p2d->pl_sel = endpoint.id;  in imx8qxp_pxl2dpi_set_pixel_link_sel()
327 	struct device *dev = p2d->dev;  in imx8qxp_pxl2dpi_parse_dt_companion()
334 	/* Locate the companion PXL2DPI for dual-link operation, if any. */  in imx8qxp_pxl2dpi_parse_dt_companion()
335 	companion = of_parse_phandle(dev->of_node, "fsl,companion-pxl2dpi", 0);  in imx8qxp_pxl2dpi_parse_dt_companion()
341 		ret = -ENODEV;  in imx8qxp_pxl2dpi_parse_dt_companion()
349 	match = of_match_device(dev->driver->of_match_table, dev);  in imx8qxp_pxl2dpi_parse_dt_companion()
350 	if (!of_device_is_compatible(companion, match->compatible)) {  in imx8qxp_pxl2dpi_parse_dt_companion()
352 		ret = -ENXIO;  in imx8qxp_pxl2dpi_parse_dt_companion()
356 	p2d->companion = of_drm_find_bridge(companion);  in imx8qxp_pxl2dpi_parse_dt_companion()
357 	if (!p2d->companion) {  in imx8qxp_pxl2dpi_parse_dt_companion()
358 		ret = -EPROBE_DEFER;  in imx8qxp_pxl2dpi_parse_dt_companion()
359 		DRM_DEV_DEBUG_DRIVER(p2d->dev,  in imx8qxp_pxl2dpi_parse_dt_companion()
365 	companion_p2d = bridge_to_p2d(p2d->companion);  in imx8qxp_pxl2dpi_parse_dt_companion()
369 	 * dual-link mode.  We do this by looking at the DT port nodes that  in imx8qxp_pxl2dpi_parse_dt_companion()
373 	port1 = of_graph_get_port_by_id(p2d->next_bridge->of_node, 1);  in imx8qxp_pxl2dpi_parse_dt_companion()
374 	port2 = of_graph_get_port_by_id(companion_p2d->next_bridge->of_node, 1);  in imx8qxp_pxl2dpi_parse_dt_companion()
381 		DRM_DEV_ERROR(dev, "failed to get dual link pixel order: %d\n",  in imx8qxp_pxl2dpi_parse_dt_companion()
387 			     "dual-link configuration detected (companion bridge %pOF)\n",  in imx8qxp_pxl2dpi_parse_dt_companion()
397 	struct device *dev = &pdev->dev;  in imx8qxp_pxl2dpi_bridge_probe()
398 	struct device_node *np = dev->of_node;  in imx8qxp_pxl2dpi_bridge_probe()
403 		return -ENOMEM;  in imx8qxp_pxl2dpi_bridge_probe()
405 	p2d->regmap = syscon_node_to_regmap(np->parent);  in imx8qxp_pxl2dpi_bridge_probe()
406 	if (IS_ERR(p2d->regmap)) {  in imx8qxp_pxl2dpi_bridge_probe()
407 		ret = PTR_ERR(p2d->regmap);  in imx8qxp_pxl2dpi_bridge_probe()
408 		if (ret != -EPROBE_DEFER)  in imx8qxp_pxl2dpi_bridge_probe()
413 	ret = imx_scu_get_handle(&p2d->ipc_handle);  in imx8qxp_pxl2dpi_bridge_probe()
415 		if (ret != -EPROBE_DEFER)  in imx8qxp_pxl2dpi_bridge_probe()
421 	p2d->dev = dev;  in imx8qxp_pxl2dpi_bridge_probe()
423 	ret = of_property_read_u32(np, "fsl,sc-resource", &p2d->sc_resource);  in imx8qxp_pxl2dpi_bridge_probe()
429 	p2d->next_bridge = imx8qxp_pxl2dpi_find_next_bridge(p2d);  in imx8qxp_pxl2dpi_bridge_probe()
430 	if (IS_ERR(p2d->next_bridge)) {  in imx8qxp_pxl2dpi_bridge_probe()
431 		ret = PTR_ERR(p2d->next_bridge);  in imx8qxp_pxl2dpi_bridge_probe()
432 		if (ret != -EPROBE_DEFER)  in imx8qxp_pxl2dpi_bridge_probe()
449 	p2d->bridge.driver_private = p2d;  in imx8qxp_pxl2dpi_bridge_probe()
450 	p2d->bridge.funcs = &imx8qxp_pxl2dpi_bridge_funcs;  in imx8qxp_pxl2dpi_bridge_probe()
451 	p2d->bridge.of_node = np;  in imx8qxp_pxl2dpi_bridge_probe()
453 	drm_bridge_add(&p2d->bridge);  in imx8qxp_pxl2dpi_bridge_probe()
462 	drm_bridge_remove(&p2d->bridge);  in imx8qxp_pxl2dpi_bridge_remove()
464 	pm_runtime_disable(&pdev->dev);  in imx8qxp_pxl2dpi_bridge_remove()
468 	{ .compatible = "fsl,imx8qxp-pxl2dpi", },
483 MODULE_DESCRIPTION("i.MX8QXP pixel link to DPI bridge driver");