1 // SPDX-License-Identifier: GPL-2.0-or-later
7 #include <linux/media-bus-format.h>
99 	return (fsl_ldb->ch0_enabled && fsl_ldb->ch1_enabled);  in fsl_ldb_is_dual()
120 	return drm_bridge_attach(bridge->encoder, fsl_ldb->panel_bridge,  in fsl_ldb_attach()
128 	struct drm_atomic_state *state = old_bridge_state->base.state;  in fsl_ldb_atomic_enable()
143 	switch (bridge_state->output_bus_cfg.format) {  in fsl_ldb_atomic_enable()
163 		dev_warn(fsl_ldb->dev,  in fsl_ldb_atomic_enable()
165 			 bridge_state->output_bus_cfg.format);  in fsl_ldb_atomic_enable()
174 							     bridge->encoder);  in fsl_ldb_atomic_enable()
175 	crtc = drm_atomic_get_new_connector_state(state, connector)->crtc;  in fsl_ldb_atomic_enable()
177 	mode = &crtc_state->adjusted_mode;  in fsl_ldb_atomic_enable()
179 	requested_link_freq = fsl_ldb_link_frequency(fsl_ldb, mode->clock);  in fsl_ldb_atomic_enable()
180 	clk_set_rate(fsl_ldb->clk, requested_link_freq);  in fsl_ldb_atomic_enable()
182 	configured_link_freq = clk_get_rate(fsl_ldb->clk);  in fsl_ldb_atomic_enable()
184 …dev_warn(fsl_ldb->dev, "Configured LDB clock (%lu Hz) does not match requested LVDS clock: %lu Hz\…  in fsl_ldb_atomic_enable()
188 	clk_prepare_enable(fsl_ldb->clk);  in fsl_ldb_atomic_enable()
191 	reg =	(fsl_ldb->ch0_enabled ? LDB_CTRL_CH0_ENABLE : 0) |  in fsl_ldb_atomic_enable()
192 		(fsl_ldb->ch1_enabled ? LDB_CTRL_CH1_ENABLE : 0) |  in fsl_ldb_atomic_enable()
196 		reg |=	(fsl_ldb->ch0_enabled ? LDB_CTRL_CH0_DATA_WIDTH : 0) |  in fsl_ldb_atomic_enable()
197 			(fsl_ldb->ch1_enabled ? LDB_CTRL_CH1_DATA_WIDTH : 0);  in fsl_ldb_atomic_enable()
200 		reg |=	(fsl_ldb->ch0_enabled ? LDB_CTRL_CH0_BIT_MAPPING : 0) |  in fsl_ldb_atomic_enable()
201 			(fsl_ldb->ch1_enabled ? LDB_CTRL_CH1_BIT_MAPPING : 0);  in fsl_ldb_atomic_enable()
203 	if (mode->flags & DRM_MODE_FLAG_PVSYNC)  in fsl_ldb_atomic_enable()
204 		reg |=	(fsl_ldb->ch0_enabled ? LDB_CTRL_DI0_VSYNC_POLARITY : 0) |  in fsl_ldb_atomic_enable()
205 			(fsl_ldb->ch1_enabled ? LDB_CTRL_DI1_VSYNC_POLARITY : 0);  in fsl_ldb_atomic_enable()
207 	regmap_write(fsl_ldb->regmap, fsl_ldb->devdata->ldb_ctrl, reg);  in fsl_ldb_atomic_enable()
209 	if (fsl_ldb->devdata->single_ctrl_reg)  in fsl_ldb_atomic_enable()
215 	regmap_write(fsl_ldb->regmap, fsl_ldb->devdata->lvds_ctrl, reg);  in fsl_ldb_atomic_enable()
220 	reg |=	(fsl_ldb->ch0_enabled ? LVDS_CTRL_CH0_EN : 0) |  in fsl_ldb_atomic_enable()
221 		(fsl_ldb->ch1_enabled ? LVDS_CTRL_CH1_EN : 0);  in fsl_ldb_atomic_enable()
223 	regmap_write(fsl_ldb->regmap, fsl_ldb->devdata->lvds_ctrl, reg);  in fsl_ldb_atomic_enable()
232 	if (fsl_ldb->devdata->lvds_en_bit)  in fsl_ldb_atomic_disable()
234 		regmap_write(fsl_ldb->regmap, fsl_ldb->devdata->lvds_ctrl,  in fsl_ldb_atomic_disable()
237 		if (!fsl_ldb->devdata->single_ctrl_reg)  in fsl_ldb_atomic_disable()
238 			regmap_write(fsl_ldb->regmap, fsl_ldb->devdata->lvds_ctrl, 0);  in fsl_ldb_atomic_disable()
239 	regmap_write(fsl_ldb->regmap, fsl_ldb->devdata->ldb_ctrl, 0);  in fsl_ldb_atomic_disable()
241 	clk_disable_unprepare(fsl_ldb->clk);  in fsl_ldb_atomic_disable()
275 	if (mode->clock > (fsl_ldb_is_dual(fsl_ldb) ? 160000 : 80000))  in fsl_ldb_mode_valid()
294 	struct device *dev = &pdev->dev;  in fsl_ldb_probe()
303 		return -ENOMEM;  in fsl_ldb_probe()
305 	fsl_ldb->devdata = of_device_get_match_data(dev);  in fsl_ldb_probe()
306 	if (!fsl_ldb->devdata)  in fsl_ldb_probe()
307 		return -EINVAL;  in fsl_ldb_probe()
309 	fsl_ldb->dev = &pdev->dev;  in fsl_ldb_probe()
310 	fsl_ldb->bridge.funcs = &funcs;  in fsl_ldb_probe()
311 	fsl_ldb->bridge.of_node = dev->of_node;  in fsl_ldb_probe()
313 	fsl_ldb->clk = devm_clk_get(dev, "ldb");  in fsl_ldb_probe()
314 	if (IS_ERR(fsl_ldb->clk))  in fsl_ldb_probe()
315 		return PTR_ERR(fsl_ldb->clk);  in fsl_ldb_probe()
317 	fsl_ldb->regmap = syscon_node_to_regmap(dev->of_node->parent);  in fsl_ldb_probe()
318 	if (IS_ERR(fsl_ldb->regmap))  in fsl_ldb_probe()
319 		return PTR_ERR(fsl_ldb->regmap);  in fsl_ldb_probe()
322 	remote1 = of_graph_get_remote_node(dev->of_node, 1, 0);  in fsl_ldb_probe()
323 	remote2 = of_graph_get_remote_node(dev->of_node, 2, 0);  in fsl_ldb_probe()
324 	fsl_ldb->ch0_enabled = (remote1 != NULL);  in fsl_ldb_probe()
325 	fsl_ldb->ch1_enabled = (remote2 != NULL);  in fsl_ldb_probe()
330 	if (!fsl_ldb->ch0_enabled && !fsl_ldb->ch1_enabled) {  in fsl_ldb_probe()
332 		return dev_err_probe(dev, -ENXIO, "No panel node found");  in fsl_ldb_probe()
336 		fsl_ldb_is_dual(fsl_ldb) ? "dual-link mode" :  in fsl_ldb_probe()
337 		fsl_ldb->ch0_enabled ? "channel 0" : "channel 1");  in fsl_ldb_probe()
344 	fsl_ldb->panel_bridge = devm_drm_panel_bridge_add(dev, panel);  in fsl_ldb_probe()
345 	if (IS_ERR(fsl_ldb->panel_bridge))  in fsl_ldb_probe()
346 		return PTR_ERR(fsl_ldb->panel_bridge);  in fsl_ldb_probe()
352 		port1 = of_graph_get_port_by_id(dev->of_node, 1);  in fsl_ldb_probe()
353 		port2 = of_graph_get_port_by_id(dev->of_node, 2);  in fsl_ldb_probe()
365 			return -EINVAL;  in fsl_ldb_probe()
371 	drm_bridge_add(&fsl_ldb->bridge);  in fsl_ldb_probe()
380 	drm_bridge_remove(&fsl_ldb->bridge);  in fsl_ldb_remove()
384 	{ .compatible = "fsl,imx6sx-ldb",
386 	{ .compatible = "fsl,imx8mp-ldb",
388 	{ .compatible = "fsl,imx93-ldb",
398 		.name		= "fsl-ldb",
405 MODULE_DESCRIPTION("Freescale i.MX8MP LDB");