1 // SPDX-License-Identifier: GPL-2.0
3  * ZynqMP DisplayPort Subsystem Driver
5  * Copyright (C) 2017 - 2020 Xilinx, Inc.
8  * - Hyun Woo Kwon <[email protected]>
9  * - Laurent Pinchart <[email protected]>
13 #include <linux/dma-mapping.h>
31 /* -----------------------------------------------------------------------------
39 	if (!dpsub->drm)  in zynqmp_dpsub_suspend()
42 	return drm_mode_config_helper_suspend(&dpsub->drm->dev);  in zynqmp_dpsub_suspend()
49 	if (!dpsub->drm)  in zynqmp_dpsub_resume()
52 	return drm_mode_config_helper_resume(&dpsub->drm->dev);  in zynqmp_dpsub_resume()
59 /* -----------------------------------------------------------------------------
67 	dpsub->apb_clk = devm_clk_get(dpsub->dev, "dp_apb_clk");  in zynqmp_dpsub_init_clocks()
68 	if (IS_ERR(dpsub->apb_clk))  in zynqmp_dpsub_init_clocks()
69 		return PTR_ERR(dpsub->apb_clk);  in zynqmp_dpsub_init_clocks()
71 	ret = clk_prepare_enable(dpsub->apb_clk);  in zynqmp_dpsub_init_clocks()
73 		dev_err(dpsub->dev, "failed to enable the APB clock\n");  in zynqmp_dpsub_init_clocks()
81 	dpsub->vid_clk = devm_clk_get(dpsub->dev, "dp_live_video_in_clk");  in zynqmp_dpsub_init_clocks()
82 	if (!IS_ERR(dpsub->vid_clk))  in zynqmp_dpsub_init_clocks()
83 		dpsub->vid_clk_from_ps = false;  in zynqmp_dpsub_init_clocks()
84 	else if (PTR_ERR(dpsub->vid_clk) == -EPROBE_DEFER)  in zynqmp_dpsub_init_clocks()
85 		return PTR_ERR(dpsub->vid_clk);  in zynqmp_dpsub_init_clocks()
87 	if (IS_ERR_OR_NULL(dpsub->vid_clk)) {  in zynqmp_dpsub_init_clocks()
88 		dpsub->vid_clk = devm_clk_get(dpsub->dev, "dp_vtc_pixel_clk_in");  in zynqmp_dpsub_init_clocks()
89 		if (IS_ERR(dpsub->vid_clk)) {  in zynqmp_dpsub_init_clocks()
90 			dev_err(dpsub->dev, "failed to init any video clock\n");  in zynqmp_dpsub_init_clocks()
91 			return PTR_ERR(dpsub->vid_clk);  in zynqmp_dpsub_init_clocks()
93 		dpsub->vid_clk_from_ps = true;  in zynqmp_dpsub_init_clocks()
101 	dpsub->aud_clk = devm_clk_get(dpsub->dev, "dp_live_audio_aclk");  in zynqmp_dpsub_init_clocks()
102 	if (!IS_ERR(dpsub->aud_clk)) {  in zynqmp_dpsub_init_clocks()
103 		dpsub->aud_clk_from_ps = false;  in zynqmp_dpsub_init_clocks()
107 	dpsub->aud_clk = devm_clk_get(dpsub->dev, "dp_aud_clk");  in zynqmp_dpsub_init_clocks()
108 	if (!IS_ERR(dpsub->aud_clk)) {  in zynqmp_dpsub_init_clocks()
109 		dpsub->aud_clk_from_ps = true;  in zynqmp_dpsub_init_clocks()
113 	dev_info(dpsub->dev, "audio disabled due to missing clock\n");  in zynqmp_dpsub_init_clocks()
127 	np = of_get_child_by_name(dpsub->dev->of_node, "ports");  in zynqmp_dpsub_parse_dt()
130 		dev_warn(dpsub->dev, "missing ports, update DT bindings\n");  in zynqmp_dpsub_parse_dt()
131 		dpsub->connected_ports = BIT(ZYNQMP_DPSUB_PORT_OUT_DP);  in zynqmp_dpsub_parse_dt()
132 		dpsub->dma_enabled = true;  in zynqmp_dpsub_parse_dt()
140 		np = of_graph_get_remote_node(dpsub->dev->of_node, i, -1);  in zynqmp_dpsub_parse_dt()
142 			dpsub->connected_ports |= BIT(i);  in zynqmp_dpsub_parse_dt()
148 	if ((dpsub->connected_ports & BIT(ZYNQMP_DPSUB_PORT_LIVE_VIDEO)) &&  in zynqmp_dpsub_parse_dt()
149 	    (dpsub->connected_ports & BIT(ZYNQMP_DPSUB_PORT_LIVE_GFX))) {  in zynqmp_dpsub_parse_dt()
150 		dev_err(dpsub->dev, "only one live video input is supported\n");  in zynqmp_dpsub_parse_dt()
151 		return -EINVAL;  in zynqmp_dpsub_parse_dt()
154 	if ((dpsub->connected_ports & BIT(ZYNQMP_DPSUB_PORT_LIVE_VIDEO)) ||  in zynqmp_dpsub_parse_dt()
155 	    (dpsub->connected_ports & BIT(ZYNQMP_DPSUB_PORT_LIVE_GFX))) {  in zynqmp_dpsub_parse_dt()
156 		if (dpsub->vid_clk_from_ps) {  in zynqmp_dpsub_parse_dt()
157 			dev_err(dpsub->dev,  in zynqmp_dpsub_parse_dt()
159 			return -EINVAL;  in zynqmp_dpsub_parse_dt()
162 		dpsub->dma_enabled = true;  in zynqmp_dpsub_parse_dt()
165 	if (dpsub->connected_ports & BIT(ZYNQMP_DPSUB_PORT_LIVE_AUDIO))  in zynqmp_dpsub_parse_dt()
166 		dev_warn(dpsub->dev, "live audio unsupported, ignoring\n");  in zynqmp_dpsub_parse_dt()
168 	if ((dpsub->connected_ports & BIT(ZYNQMP_DPSUB_PORT_OUT_VIDEO)) ||  in zynqmp_dpsub_parse_dt()
169 	    (dpsub->connected_ports & BIT(ZYNQMP_DPSUB_PORT_OUT_AUDIO)))  in zynqmp_dpsub_parse_dt()
170 		dev_warn(dpsub->dev, "output to PL unsupported, ignoring\n");  in zynqmp_dpsub_parse_dt()
172 	if (!(dpsub->connected_ports & BIT(ZYNQMP_DPSUB_PORT_OUT_DP))) {  in zynqmp_dpsub_parse_dt()
173 		dev_err(dpsub->dev, "DP output port not connected\n");  in zynqmp_dpsub_parse_dt()
174 		return -EINVAL;  in zynqmp_dpsub_parse_dt()
182 	kfree(dpsub->disp);  in zynqmp_dpsub_release()
183 	kfree(dpsub->dp);  in zynqmp_dpsub_release()
195 		return -ENOMEM;  in zynqmp_dpsub_probe()
197 	dpsub->dev = &pdev->dev;  in zynqmp_dpsub_probe()
200 	ret = dma_set_mask(dpsub->dev, DMA_BIT_MASK(ZYNQMP_DISP_MAX_DMA_BIT));  in zynqmp_dpsub_probe()
204 	dma_set_max_seg_size(&pdev->dev, DMA_BIT_MASK(32));  in zynqmp_dpsub_probe()
207 	of_reserved_mem_device_init(&pdev->dev);  in zynqmp_dpsub_probe()
217 	pm_runtime_enable(&pdev->dev);  in zynqmp_dpsub_probe()
231 	drm_bridge_add(dpsub->bridge);  in zynqmp_dpsub_probe()
233 	if (dpsub->dma_enabled) {  in zynqmp_dpsub_probe()
243 	dev_info(&pdev->dev, "ZynqMP DisplayPort Subsystem driver probed");  in zynqmp_dpsub_probe()
248 	if (dpsub->drm)  in zynqmp_dpsub_probe()
251 	drm_bridge_remove(dpsub->bridge);  in zynqmp_dpsub_probe()
256 	pm_runtime_disable(&pdev->dev);  in zynqmp_dpsub_probe()
257 	clk_disable_unprepare(dpsub->apb_clk);  in zynqmp_dpsub_probe()
259 	of_reserved_mem_device_release(&pdev->dev);  in zynqmp_dpsub_probe()
260 	if (!dpsub->drm)  in zynqmp_dpsub_probe()
271 	if (dpsub->drm)  in zynqmp_dpsub_remove()
274 	drm_bridge_remove(dpsub->bridge);  in zynqmp_dpsub_remove()
278 	pm_runtime_disable(&pdev->dev);  in zynqmp_dpsub_remove()
279 	clk_disable_unprepare(dpsub->apb_clk);  in zynqmp_dpsub_remove()
280 	of_reserved_mem_device_release(&pdev->dev);  in zynqmp_dpsub_remove()
282 	if (!dpsub->drm)  in zynqmp_dpsub_remove()
290 	if (!dpsub->drm)  in zynqmp_dpsub_shutdown()
293 	drm_atomic_helper_shutdown(&dpsub->drm->dev);  in zynqmp_dpsub_shutdown()
297 	{ .compatible = "xlnx,zynqmp-dpsub-1.7", },
307 		.name		= "zynqmp-dpsub",
316 MODULE_DESCRIPTION("ZynqMP DP Subsystem Driver");