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
sti_compositor_debugfs_init(struct sti_compositor * compo,struct drm_minor * minor)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
sti_compositor_bind(struct device * dev,struct device * master,void * data)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 /* Allow usage of vblank without having to call drm_irq_install */
149 drm_dev->irq_enabled = 1;
150
151 return 0;
152 }
153
sti_compositor_unbind(struct device * dev,struct device * master,void * data)154 static void sti_compositor_unbind(struct device *dev, struct device *master,
155 void *data)
156 {
157 /* do nothing */
158 }
159
160 static const struct component_ops sti_compositor_ops = {
161 .bind = sti_compositor_bind,
162 .unbind = sti_compositor_unbind,
163 };
164
165 static const struct of_device_id compositor_of_match[] = {
166 {
167 .compatible = "st,stih407-compositor",
168 .data = &stih407_compositor_data,
169 }, {
170 /* end node */
171 }
172 };
173 MODULE_DEVICE_TABLE(of, compositor_of_match);
174
sti_compositor_probe(struct platform_device * pdev)175 static int sti_compositor_probe(struct platform_device *pdev)
176 {
177 struct device *dev = &pdev->dev;
178 struct device_node *np = dev->of_node;
179 struct device_node *vtg_np;
180 struct sti_compositor *compo;
181 struct resource *res;
182 unsigned int i;
183
184 compo = devm_kzalloc(dev, sizeof(*compo), GFP_KERNEL);
185 if (!compo) {
186 DRM_ERROR("Failed to allocate compositor context\n");
187 return -ENOMEM;
188 }
189 compo->dev = dev;
190 for (i = 0; i < STI_MAX_MIXER; i++)
191 compo->vtg_vblank_nb[i].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_shared(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_shared(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[STI_MIXER_MAIN] = of_vtg_find(vtg_np);
250 of_node_put(vtg_np);
251
252 vtg_np = of_parse_phandle(pdev->dev.of_node, "st,vtg", 1);
253 if (vtg_np)
254 compo->vtg[STI_MIXER_AUX] = of_vtg_find(vtg_np);
255 of_node_put(vtg_np);
256
257 platform_set_drvdata(pdev, compo);
258
259 return component_add(&pdev->dev, &sti_compositor_ops);
260 }
261
sti_compositor_remove(struct platform_device * pdev)262 static int sti_compositor_remove(struct platform_device *pdev)
263 {
264 component_del(&pdev->dev, &sti_compositor_ops);
265 return 0;
266 }
267
268 struct platform_driver sti_compositor_driver = {
269 .driver = {
270 .name = "sti-compositor",
271 .of_match_table = compositor_of_match,
272 },
273 .probe = sti_compositor_probe,
274 .remove = sti_compositor_remove,
275 };
276
277 MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
278 MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
279 MODULE_LICENSE("GPL");
280
