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 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 /*
43  * stiH416 compositor properties
44  * Note:
45  * on stih416 MIXER_AUX has a different base address from MIXER_MAIN
46  * Moreover, GDPx is different for Main and Aux Mixer. So this subdev map does
47  * not fit for stiH416 if we want to enable the MIXER_AUX.
48  */
49 struct sti_compositor_data stih416_compositor_data = {
50 	.nb_subdev = 3,
51 	.subdev_desc = {
52 			{STI_GPD_SUBDEV, (int)STI_GDP_0, 0x100},
53 			{STI_GPD_SUBDEV, (int)STI_GDP_1, 0x200},
54 			{STI_MIXER_MAIN_SUBDEV, STI_MIXER_MAIN, 0xC00}
55 	},
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, 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, 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("Unknow subdev compoment 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 compoment 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,stih416-compositor",
167 		.data = &stih416_compositor_data,
168 	}, {
169 		.compatible = "st,stih407-compositor",
170 		.data = &stih407_compositor_data,
171 	}, {
172 		/* end node */
173 	}
174 };
175 MODULE_DEVICE_TABLE(of, compositor_of_match);
176 
177 static int sti_compositor_probe(struct platform_device *pdev)
178 {
179 	struct device *dev = &pdev->dev;
180 	struct device_node *np = dev->of_node;
181 	struct device_node *vtg_np;
182 	struct sti_compositor *compo;
183 	struct resource *res;
184 
185 	compo = devm_kzalloc(dev, sizeof(*compo), GFP_KERNEL);
186 	if (!compo) {
187 		DRM_ERROR("Failed to allocate compositor context\n");
188 		return -ENOMEM;
189 	}
190 	compo->dev = dev;
191 	compo->vtg_vblank_nb.notifier_call = sti_crtc_vblank_cb;
192 
193 	/* populate data structure depending on compatibility */
194 	BUG_ON(!of_match_node(compositor_of_match, np)->data);
195 
196 	memcpy(&compo->data, of_match_node(compositor_of_match, np)->data,
197 	       sizeof(struct sti_compositor_data));
198 
199 	/* Get Memory ressources */
200 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
201 	if (res == NULL) {
202 		DRM_ERROR("Get memory resource failed\n");
203 		return -ENXIO;
204 	}
205 	compo->regs = devm_ioremap(dev, res->start, resource_size(res));
206 	if (compo->regs == NULL) {
207 		DRM_ERROR("Register mapping failed\n");
208 		return -ENXIO;
209 	}
210 
211 	/* Get clock resources */
212 	compo->clk_compo_main = devm_clk_get(dev, "compo_main");
213 	if (IS_ERR(compo->clk_compo_main)) {
214 		DRM_ERROR("Cannot get compo_main clock\n");
215 		return PTR_ERR(compo->clk_compo_main);
216 	}
217 
218 	compo->clk_compo_aux = devm_clk_get(dev, "compo_aux");
219 	if (IS_ERR(compo->clk_compo_aux)) {
220 		DRM_ERROR("Cannot get compo_aux clock\n");
221 		return PTR_ERR(compo->clk_compo_aux);
222 	}
223 
224 	compo->clk_pix_main = devm_clk_get(dev, "pix_main");
225 	if (IS_ERR(compo->clk_pix_main)) {
226 		DRM_ERROR("Cannot get pix_main clock\n");
227 		return PTR_ERR(compo->clk_pix_main);
228 	}
229 
230 	compo->clk_pix_aux = devm_clk_get(dev, "pix_aux");
231 	if (IS_ERR(compo->clk_pix_aux)) {
232 		DRM_ERROR("Cannot get pix_aux clock\n");
233 		return PTR_ERR(compo->clk_pix_aux);
234 	}
235 
236 	/* Get reset resources */
237 	compo->rst_main = devm_reset_control_get(dev, "compo-main");
238 	/* Take compo main out of reset */
239 	if (!IS_ERR(compo->rst_main))
240 		reset_control_deassert(compo->rst_main);
241 
242 	compo->rst_aux = devm_reset_control_get(dev, "compo-aux");
243 	/* Take compo aux out of reset */
244 	if (!IS_ERR(compo->rst_aux))
245 		reset_control_deassert(compo->rst_aux);
246 
247 	vtg_np = of_parse_phandle(pdev->dev.of_node, "st,vtg", 0);
248 	if (vtg_np)
249 		compo->vtg_main = of_vtg_find(vtg_np);
250 
251 	vtg_np = of_parse_phandle(pdev->dev.of_node, "st,vtg", 1);
252 	if (vtg_np)
253 		compo->vtg_aux = of_vtg_find(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