1 /*
2  * Copyright (C) STMicroelectronics SA 2014
3  * Authors: Benjamin Gaignard <benjamin.gaignard@st.com>
4  *          Fabien Dessenne <fabien.dessenne@st.com>
5  *          for STMicroelectronics.
6  * License terms:  GNU General Public License (GPL), version 2
7  */
8 
9 #include <linux/component.h>
10 #include <linux/module.h>
11 #include <linux/platform_device.h>
12 #include <linux/reset.h>
13 
14 #include <drm/drmP.h>
15 
16 #include "sti_compositor.h"
17 #include "sti_crtc.h"
18 #include "sti_cursor.h"
19 #include "sti_drv.h"
20 #include "sti_gdp.h"
21 #include "sti_plane.h"
22 #include "sti_vid.h"
23 #include "sti_vtg.h"
24 
25 /*
26  * stiH407 compositor properties
27  */
28 static const struct sti_compositor_data stih407_compositor_data = {
29 	.nb_subdev = 8,
30 	.subdev_desc = {
31 			{STI_CURSOR_SUBDEV, (int)STI_CURSOR, 0x000},
32 			{STI_GPD_SUBDEV, (int)STI_GDP_0, 0x100},
33 			{STI_GPD_SUBDEV, (int)STI_GDP_1, 0x200},
34 			{STI_GPD_SUBDEV, (int)STI_GDP_2, 0x300},
35 			{STI_GPD_SUBDEV, (int)STI_GDP_3, 0x400},
36 			{STI_VID_SUBDEV, (int)STI_HQVDP_0, 0x700},
37 			{STI_MIXER_MAIN_SUBDEV, STI_MIXER_MAIN, 0xC00},
38 			{STI_MIXER_AUX_SUBDEV, STI_MIXER_AUX, 0xD00},
39 	},
40 };
41 
42 int sti_compositor_debugfs_init(struct sti_compositor *compo,
43 				struct drm_minor *minor)
44 {
45 	unsigned int i;
46 
47 	for (i = 0; i < STI_MAX_VID; i++)
48 		if (compo->vid[i])
49 			vid_debugfs_init(compo->vid[i], minor);
50 
51 	for (i = 0; i < STI_MAX_MIXER; i++)
52 		if (compo->mixer[i])
53 			sti_mixer_debugfs_init(compo->mixer[i], minor);
54 
55 	return 0;
56 }
57 
58 static int sti_compositor_bind(struct device *dev,
59 			       struct device *master,
60 			       void *data)
61 {
62 	struct sti_compositor *compo = dev_get_drvdata(dev);
63 	struct drm_device *drm_dev = data;
64 	unsigned int i, mixer_id = 0, vid_id = 0, crtc_id = 0;
65 	struct sti_private *dev_priv = drm_dev->dev_private;
66 	struct drm_plane *cursor = NULL;
67 	struct drm_plane *primary = NULL;
68 	struct sti_compositor_subdev_descriptor *desc = compo->data.subdev_desc;
69 	unsigned int array_size = compo->data.nb_subdev;
70 
71 	dev_priv->compo = compo;
72 
73 	/* Register mixer subdev and video subdev first */
74 	for (i = 0; i < array_size; i++) {
75 		switch (desc[i].type) {
76 		case STI_VID_SUBDEV:
77 			compo->vid[vid_id++] =
78 			    sti_vid_create(compo->dev, drm_dev, desc[i].id,
79 					   compo->regs + desc[i].offset);
80 			break;
81 		case STI_MIXER_MAIN_SUBDEV:
82 		case STI_MIXER_AUX_SUBDEV:
83 			compo->mixer[mixer_id++] =
84 			    sti_mixer_create(compo->dev, drm_dev, desc[i].id,
85 					     compo->regs + desc[i].offset);
86 			break;
87 		case STI_GPD_SUBDEV:
88 		case STI_CURSOR_SUBDEV:
89 			/* Nothing to do, wait for the second round */
90 			break;
91 		default:
92 			DRM_ERROR("Unknown subdev component type\n");
93 			return 1;
94 		}
95 	}
96 
97 	/* Register the other subdevs, create crtc and planes */
98 	for (i = 0; i < array_size; i++) {
99 		enum drm_plane_type plane_type = DRM_PLANE_TYPE_OVERLAY;
100 
101 		if (crtc_id < mixer_id)
102 			plane_type = DRM_PLANE_TYPE_PRIMARY;
103 
104 		switch (desc[i].type) {
105 		case STI_MIXER_MAIN_SUBDEV:
106 		case STI_MIXER_AUX_SUBDEV:
107 		case STI_VID_SUBDEV:
108 			/* Nothing to do, already done at the first round */
109 			break;
110 		case STI_CURSOR_SUBDEV:
111 			cursor = sti_cursor_create(drm_dev, compo->dev,
112 						   desc[i].id,
113 						   compo->regs + desc[i].offset,
114 						   1);
115 			if (!cursor) {
116 				DRM_ERROR("Can't create CURSOR plane\n");
117 				break;
118 			}
119 			break;
120 		case STI_GPD_SUBDEV:
121 			primary = sti_gdp_create(drm_dev, compo->dev,
122 						 desc[i].id,
123 						 compo->regs + desc[i].offset,
124 						 (1 << mixer_id) - 1,
125 						 plane_type);
126 			if (!primary) {
127 				DRM_ERROR("Can't create GDP plane\n");
128 				break;
129 			}
130 			break;
131 		default:
132 			DRM_ERROR("Unknown subdev component type\n");
133 			return 1;
134 		}
135 
136 		/* The first planes are reserved for primary planes*/
137 		if (crtc_id < mixer_id && primary) {
138 			sti_crtc_init(drm_dev, compo->mixer[crtc_id],
139 				      primary, cursor);
140 			crtc_id++;
141 			cursor = NULL;
142 			primary = NULL;
143 		}
144 	}
145 
146 	drm_vblank_init(drm_dev, crtc_id);
147 	/* Allow usage of vblank without having to call drm_irq_install */
148 	drm_dev->irq_enabled = 1;
149 
150 	return 0;
151 }
152 
153 static void sti_compositor_unbind(struct device *dev, struct device *master,
154 	void *data)
155 {
156 	/* do nothing */
157 }
158 
159 static const struct component_ops sti_compositor_ops = {
160 	.bind	= sti_compositor_bind,
161 	.unbind	= sti_compositor_unbind,
162 };
163 
164 static const struct of_device_id compositor_of_match[] = {
165 	{
166 		.compatible = "st,stih407-compositor",
167 		.data = &stih407_compositor_data,
168 	}, {
169 		/* end node */
170 	}
171 };
172 MODULE_DEVICE_TABLE(of, compositor_of_match);
173 
174 static int sti_compositor_probe(struct platform_device *pdev)
175 {
176 	struct device *dev = &pdev->dev;
177 	struct device_node *np = dev->of_node;
178 	struct device_node *vtg_np;
179 	struct sti_compositor *compo;
180 	struct resource *res;
181 	unsigned int i;
182 
183 	compo = devm_kzalloc(dev, sizeof(*compo), GFP_KERNEL);
184 	if (!compo) {
185 		DRM_ERROR("Failed to allocate compositor context\n");
186 		return -ENOMEM;
187 	}
188 	compo->dev = dev;
189 	for (i = 0; i < STI_MAX_MIXER; i++)
190 		compo->vtg_vblank_nb[i].notifier_call = sti_crtc_vblank_cb;
191 
192 	/* populate data structure depending on compatibility */
193 	BUG_ON(!of_match_node(compositor_of_match, np)->data);
194 
195 	memcpy(&compo->data, of_match_node(compositor_of_match, np)->data,
196 	       sizeof(struct sti_compositor_data));
197 
198 	/* Get Memory ressources */
199 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
200 	if (res == NULL) {
201 		DRM_ERROR("Get memory resource failed\n");
202 		return -ENXIO;
203 	}
204 	compo->regs = devm_ioremap(dev, res->start, resource_size(res));
205 	if (compo->regs == NULL) {
206 		DRM_ERROR("Register mapping failed\n");
207 		return -ENXIO;
208 	}
209 
210 	/* Get clock resources */
211 	compo->clk_compo_main = devm_clk_get(dev, "compo_main");
212 	if (IS_ERR(compo->clk_compo_main)) {
213 		DRM_ERROR("Cannot get compo_main clock\n");
214 		return PTR_ERR(compo->clk_compo_main);
215 	}
216 
217 	compo->clk_compo_aux = devm_clk_get(dev, "compo_aux");
218 	if (IS_ERR(compo->clk_compo_aux)) {
219 		DRM_ERROR("Cannot get compo_aux clock\n");
220 		return PTR_ERR(compo->clk_compo_aux);
221 	}
222 
223 	compo->clk_pix_main = devm_clk_get(dev, "pix_main");
224 	if (IS_ERR(compo->clk_pix_main)) {
225 		DRM_ERROR("Cannot get pix_main clock\n");
226 		return PTR_ERR(compo->clk_pix_main);
227 	}
228 
229 	compo->clk_pix_aux = devm_clk_get(dev, "pix_aux");
230 	if (IS_ERR(compo->clk_pix_aux)) {
231 		DRM_ERROR("Cannot get pix_aux clock\n");
232 		return PTR_ERR(compo->clk_pix_aux);
233 	}
234 
235 	/* Get reset resources */
236 	compo->rst_main = devm_reset_control_get_shared(dev, "compo-main");
237 	/* Take compo main out of reset */
238 	if (!IS_ERR(compo->rst_main))
239 		reset_control_deassert(compo->rst_main);
240 
241 	compo->rst_aux = devm_reset_control_get_shared(dev, "compo-aux");
242 	/* Take compo aux out of reset */
243 	if (!IS_ERR(compo->rst_aux))
244 		reset_control_deassert(compo->rst_aux);
245 
246 	vtg_np = of_parse_phandle(pdev->dev.of_node, "st,vtg", 0);
247 	if (vtg_np)
248 		compo->vtg[STI_MIXER_MAIN] = of_vtg_find(vtg_np);
249 	of_node_put(vtg_np);
250 
251 	vtg_np = of_parse_phandle(pdev->dev.of_node, "st,vtg", 1);
252 	if (vtg_np)
253 		compo->vtg[STI_MIXER_AUX] = of_vtg_find(vtg_np);
254 	of_node_put(vtg_np);
255 
256 	platform_set_drvdata(pdev, compo);
257 
258 	return component_add(&pdev->dev, &sti_compositor_ops);
259 }
260 
261 static int sti_compositor_remove(struct platform_device *pdev)
262 {
263 	component_del(&pdev->dev, &sti_compositor_ops);
264 	return 0;
265 }
266 
267 struct platform_driver sti_compositor_driver = {
268 	.driver = {
269 		.name = "sti-compositor",
270 		.of_match_table = compositor_of_match,
271 	},
272 	.probe = sti_compositor_probe,
273 	.remove = sti_compositor_remove,
274 };
275 
276 MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
277 MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
278 MODULE_LICENSE("GPL");
279