1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright (C) STMicroelectronics SA 2014
4  * Authors: Benjamin Gaignard <benjamin.gaignard@st.com>
5  *          Fabien Dessenne <fabien.dessenne@st.com>
6  *          for STMicroelectronics.
7  */
8 
9 #include <linux/component.h>
10 #include <linux/io.h>
11 #include <linux/module.h>
12 #include <linux/platform_device.h>
13 #include <linux/reset.h>
14 
15 #include <drm/drm_device.h>
16 #include <drm/drm_print.h>
17 #include <drm/drm_vblank.h>
18 
19 #include "sti_compositor.h"
20 #include "sti_crtc.h"
21 #include "sti_cursor.h"
22 #include "sti_drv.h"
23 #include "sti_gdp.h"
24 #include "sti_plane.h"
25 #include "sti_vid.h"
26 #include "sti_vtg.h"
27 
28 /*
29  * stiH407 compositor properties
30  */
31 static const struct sti_compositor_data stih407_compositor_data = {
32 	.nb_subdev = 8,
33 	.subdev_desc = {
34 			{STI_CURSOR_SUBDEV, (int)STI_CURSOR, 0x000},
35 			{STI_GPD_SUBDEV, (int)STI_GDP_0, 0x100},
36 			{STI_GPD_SUBDEV, (int)STI_GDP_1, 0x200},
37 			{STI_GPD_SUBDEV, (int)STI_GDP_2, 0x300},
38 			{STI_GPD_SUBDEV, (int)STI_GDP_3, 0x400},
39 			{STI_VID_SUBDEV, (int)STI_HQVDP_0, 0x700},
40 			{STI_MIXER_MAIN_SUBDEV, STI_MIXER_MAIN, 0xC00},
41 			{STI_MIXER_AUX_SUBDEV, STI_MIXER_AUX, 0xD00},
42 	},
43 };
44 
45 void sti_compositor_debugfs_init(struct sti_compositor *compo,
46 				 struct drm_minor *minor)
47 {
48 	unsigned int i;
49 
50 	for (i = 0; i < STI_MAX_VID; i++)
51 		if (compo->vid[i])
52 			vid_debugfs_init(compo->vid[i], minor);
53 
54 	for (i = 0; i < STI_MAX_MIXER; i++)
55 		if (compo->mixer[i])
56 			sti_mixer_debugfs_init(compo->mixer[i], minor);
57 }
58 
59 static int sti_compositor_bind(struct device *dev,
60 			       struct device *master,
61 			       void *data)
62 {
63 	struct sti_compositor *compo = dev_get_drvdata(dev);
64 	struct drm_device *drm_dev = data;
65 	unsigned int i, mixer_id = 0, vid_id = 0, crtc_id = 0;
66 	struct sti_private *dev_priv = drm_dev->dev_private;
67 	struct drm_plane *cursor = NULL;
68 	struct drm_plane *primary = NULL;
69 	struct sti_compositor_subdev_descriptor *desc = compo->data.subdev_desc;
70 	unsigned int array_size = compo->data.nb_subdev;
71 
72 	dev_priv->compo = compo;
73 
74 	/* Register mixer subdev and video subdev first */
75 	for (i = 0; i < array_size; i++) {
76 		switch (desc[i].type) {
77 		case STI_VID_SUBDEV:
78 			compo->vid[vid_id++] =
79 			    sti_vid_create(compo->dev, drm_dev, desc[i].id,
80 					   compo->regs + desc[i].offset);
81 			break;
82 		case STI_MIXER_MAIN_SUBDEV:
83 		case STI_MIXER_AUX_SUBDEV:
84 			compo->mixer[mixer_id++] =
85 			    sti_mixer_create(compo->dev, drm_dev, desc[i].id,
86 					     compo->regs + desc[i].offset);
87 			break;
88 		case STI_GPD_SUBDEV:
89 		case STI_CURSOR_SUBDEV:
90 			/* Nothing to do, wait for the second round */
91 			break;
92 		default:
93 			DRM_ERROR("Unknown subdev component type\n");
94 			return 1;
95 		}
96 	}
97 
98 	/* Register the other subdevs, create crtc and planes */
99 	for (i = 0; i < array_size; i++) {
100 		enum drm_plane_type plane_type = DRM_PLANE_TYPE_OVERLAY;
101 
102 		if (crtc_id < mixer_id)
103 			plane_type = DRM_PLANE_TYPE_PRIMARY;
104 
105 		switch (desc[i].type) {
106 		case STI_MIXER_MAIN_SUBDEV:
107 		case STI_MIXER_AUX_SUBDEV:
108 		case STI_VID_SUBDEV:
109 			/* Nothing to do, already done at the first round */
110 			break;
111 		case STI_CURSOR_SUBDEV:
112 			cursor = sti_cursor_create(drm_dev, compo->dev,
113 						   desc[i].id,
114 						   compo->regs + desc[i].offset,
115 						   1);
116 			if (!cursor) {
117 				DRM_ERROR("Can't create CURSOR plane\n");
118 				break;
119 			}
120 			break;
121 		case STI_GPD_SUBDEV:
122 			primary = sti_gdp_create(drm_dev, compo->dev,
123 						 desc[i].id,
124 						 compo->regs + desc[i].offset,
125 						 (1 << mixer_id) - 1,
126 						 plane_type);
127 			if (!primary) {
128 				DRM_ERROR("Can't create GDP plane\n");
129 				break;
130 			}
131 			break;
132 		default:
133 			DRM_ERROR("Unknown subdev component type\n");
134 			return 1;
135 		}
136 
137 		/* The first planes are reserved for primary planes*/
138 		if (crtc_id < mixer_id && primary) {
139 			sti_crtc_init(drm_dev, compo->mixer[crtc_id],
140 				      primary, cursor);
141 			crtc_id++;
142 			cursor = NULL;
143 			primary = NULL;
144 		}
145 	}
146 
147 	drm_vblank_init(drm_dev, crtc_id);
148 
149 	return 0;
150 }
151 
152 static void sti_compositor_unbind(struct device *dev, struct device *master,
153 	void *data)
154 {
155 	/* do nothing */
156 }
157 
158 static const struct component_ops sti_compositor_ops = {
159 	.bind	= sti_compositor_bind,
160 	.unbind	= sti_compositor_unbind,
161 };
162 
163 static const struct of_device_id compositor_of_match[] = {
164 	{
165 		.compatible = "st,stih407-compositor",
166 		.data = &stih407_compositor_data,
167 	}, {
168 		/* end node */
169 	}
170 };
171 MODULE_DEVICE_TABLE(of, compositor_of_match);
172 
173 static int sti_compositor_probe(struct platform_device *pdev)
174 {
175 	struct device *dev = &pdev->dev;
176 	struct device_node *np = dev->of_node;
177 	struct device_node *vtg_np;
178 	struct sti_compositor *compo;
179 	struct resource *res;
180 	unsigned int i;
181 
182 	compo = devm_kzalloc(dev, sizeof(*compo), GFP_KERNEL);
183 	if (!compo) {
184 		DRM_ERROR("Failed to allocate compositor context\n");
185 		return -ENOMEM;
186 	}
187 	compo->dev = dev;
188 	for (i = 0; i < STI_MAX_MIXER; i++)
189 		compo->vtg_vblank_nb[i].notifier_call = sti_crtc_vblank_cb;
190 
191 	/* populate data structure depending on compatibility */
192 	BUG_ON(!of_match_node(compositor_of_match, np)->data);
193 
194 	memcpy(&compo->data, of_match_node(compositor_of_match, np)->data,
195 	       sizeof(struct sti_compositor_data));
196 
197 	/* Get Memory ressources */
198 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
199 	if (res == NULL) {
200 		DRM_ERROR("Get memory resource failed\n");
201 		return -ENXIO;
202 	}
203 	compo->regs = devm_ioremap(dev, res->start, resource_size(res));
204 	if (compo->regs == NULL) {
205 		DRM_ERROR("Register mapping failed\n");
206 		return -ENXIO;
207 	}
208 
209 	/* Get clock resources */
210 	compo->clk_compo_main = devm_clk_get(dev, "compo_main");
211 	if (IS_ERR(compo->clk_compo_main)) {
212 		DRM_ERROR("Cannot get compo_main clock\n");
213 		return PTR_ERR(compo->clk_compo_main);
214 	}
215 
216 	compo->clk_compo_aux = devm_clk_get(dev, "compo_aux");
217 	if (IS_ERR(compo->clk_compo_aux)) {
218 		DRM_ERROR("Cannot get compo_aux clock\n");
219 		return PTR_ERR(compo->clk_compo_aux);
220 	}
221 
222 	compo->clk_pix_main = devm_clk_get(dev, "pix_main");
223 	if (IS_ERR(compo->clk_pix_main)) {
224 		DRM_ERROR("Cannot get pix_main clock\n");
225 		return PTR_ERR(compo->clk_pix_main);
226 	}
227 
228 	compo->clk_pix_aux = devm_clk_get(dev, "pix_aux");
229 	if (IS_ERR(compo->clk_pix_aux)) {
230 		DRM_ERROR("Cannot get pix_aux clock\n");
231 		return PTR_ERR(compo->clk_pix_aux);
232 	}
233 
234 	/* Get reset resources */
235 	compo->rst_main = devm_reset_control_get_shared(dev, "compo-main");
236 	/* Take compo main out of reset */
237 	if (!IS_ERR(compo->rst_main))
238 		reset_control_deassert(compo->rst_main);
239 
240 	compo->rst_aux = devm_reset_control_get_shared(dev, "compo-aux");
241 	/* Take compo aux out of reset */
242 	if (!IS_ERR(compo->rst_aux))
243 		reset_control_deassert(compo->rst_aux);
244 
245 	vtg_np = of_parse_phandle(pdev->dev.of_node, "st,vtg", 0);
246 	if (vtg_np)
247 		compo->vtg[STI_MIXER_MAIN] = of_vtg_find(vtg_np);
248 	of_node_put(vtg_np);
249 
250 	vtg_np = of_parse_phandle(pdev->dev.of_node, "st,vtg", 1);
251 	if (vtg_np)
252 		compo->vtg[STI_MIXER_AUX] = of_vtg_find(vtg_np);
253 	of_node_put(vtg_np);
254 
255 	platform_set_drvdata(pdev, compo);
256 
257 	return component_add(&pdev->dev, &sti_compositor_ops);
258 }
259 
260 static int sti_compositor_remove(struct platform_device *pdev)
261 {
262 	component_del(&pdev->dev, &sti_compositor_ops);
263 	return 0;
264 }
265 
266 struct platform_driver sti_compositor_driver = {
267 	.driver = {
268 		.name = "sti-compositor",
269 		.of_match_table = compositor_of_match,
270 	},
271 	.probe = sti_compositor_probe,
272 	.remove = sti_compositor_remove,
273 };
274 
275 MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
276 MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
277 MODULE_LICENSE("GPL");
278