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 int 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 return 0;
59 }
60
sti_compositor_bind(struct device * dev,struct device * master,void * data)61 static int sti_compositor_bind(struct device *dev,
62 struct device *master,
63 void *data)
64 {
65 struct sti_compositor *compo = dev_get_drvdata(dev);
66 struct drm_device *drm_dev = data;
67 unsigned int i, mixer_id = 0, vid_id = 0, crtc_id = 0;
68 struct sti_private *dev_priv = drm_dev->dev_private;
69 struct drm_plane *cursor = NULL;
70 struct drm_plane *primary = NULL;
71 struct sti_compositor_subdev_descriptor *desc = compo->data.subdev_desc;
72 unsigned int array_size = compo->data.nb_subdev;
73
74 dev_priv->compo = compo;
75
76 /* Register mixer subdev and video subdev first */
77 for (i = 0; i < array_size; i++) {
78 switch (desc[i].type) {
79 case STI_VID_SUBDEV:
80 compo->vid[vid_id++] =
81 sti_vid_create(compo->dev, drm_dev, desc[i].id,
82 compo->regs + desc[i].offset);
83 break;
84 case STI_MIXER_MAIN_SUBDEV:
85 case STI_MIXER_AUX_SUBDEV:
86 compo->mixer[mixer_id++] =
87 sti_mixer_create(compo->dev, drm_dev, desc[i].id,
88 compo->regs + desc[i].offset);
89 break;
90 case STI_GPD_SUBDEV:
91 case STI_CURSOR_SUBDEV:
92 /* Nothing to do, wait for the second round */
93 break;
94 default:
95 DRM_ERROR("Unknown subdev component type\n");
96 return 1;
97 }
98 }
99
100 /* Register the other subdevs, create crtc and planes */
101 for (i = 0; i < array_size; i++) {
102 enum drm_plane_type plane_type = DRM_PLANE_TYPE_OVERLAY;
103
104 if (crtc_id < mixer_id)
105 plane_type = DRM_PLANE_TYPE_PRIMARY;
106
107 switch (desc[i].type) {
108 case STI_MIXER_MAIN_SUBDEV:
109 case STI_MIXER_AUX_SUBDEV:
110 case STI_VID_SUBDEV:
111 /* Nothing to do, already done at the first round */
112 break;
113 case STI_CURSOR_SUBDEV:
114 cursor = sti_cursor_create(drm_dev, compo->dev,
115 desc[i].id,
116 compo->regs + desc[i].offset,
117 1);
118 if (!cursor) {
119 DRM_ERROR("Can't create CURSOR plane\n");
120 break;
121 }
122 break;
123 case STI_GPD_SUBDEV:
124 primary = sti_gdp_create(drm_dev, compo->dev,
125 desc[i].id,
126 compo->regs + desc[i].offset,
127 (1 << mixer_id) - 1,
128 plane_type);
129 if (!primary) {
130 DRM_ERROR("Can't create GDP plane\n");
131 break;
132 }
133 break;
134 default:
135 DRM_ERROR("Unknown subdev component type\n");
136 return 1;
137 }
138
139 /* The first planes are reserved for primary planes*/
140 if (crtc_id < mixer_id && primary) {
141 sti_crtc_init(drm_dev, compo->mixer[crtc_id],
142 primary, cursor);
143 crtc_id++;
144 cursor = NULL;
145 primary = NULL;
146 }
147 }
148
149 drm_vblank_init(drm_dev, crtc_id);
150 /* Allow usage of vblank without having to call drm_irq_install */
151 drm_dev->irq_enabled = 1;
152
153 return 0;
154 }
155
sti_compositor_unbind(struct device * dev,struct device * master,void * data)156 static void sti_compositor_unbind(struct device *dev, struct device *master,
157 void *data)
158 {
159 /* do nothing */
160 }
161
162 static const struct component_ops sti_compositor_ops = {
163 .bind = sti_compositor_bind,
164 .unbind = sti_compositor_unbind,
165 };
166
167 static const struct of_device_id compositor_of_match[] = {
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
sti_compositor_probe(struct platform_device * pdev)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 unsigned int i;
185
186 compo = devm_kzalloc(dev, sizeof(*compo), GFP_KERNEL);
187 if (!compo) {
188 DRM_ERROR("Failed to allocate compositor context\n");
189 return -ENOMEM;
190 }
191 compo->dev = dev;
192 for (i = 0; i < STI_MAX_MIXER; i++)
193 compo->vtg_vblank_nb[i].notifier_call = sti_crtc_vblank_cb;
194
195 /* populate data structure depending on compatibility */
196 BUG_ON(!of_match_node(compositor_of_match, np)->data);
197
198 memcpy(&compo->data, of_match_node(compositor_of_match, np)->data,
199 sizeof(struct sti_compositor_data));
200
201 /* Get Memory ressources */
202 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
203 if (res == NULL) {
204 DRM_ERROR("Get memory resource failed\n");
205 return -ENXIO;
206 }
207 compo->regs = devm_ioremap(dev, res->start, resource_size(res));
208 if (compo->regs == NULL) {
209 DRM_ERROR("Register mapping failed\n");
210 return -ENXIO;
211 }
212
213 /* Get clock resources */
214 compo->clk_compo_main = devm_clk_get(dev, "compo_main");
215 if (IS_ERR(compo->clk_compo_main)) {
216 DRM_ERROR("Cannot get compo_main clock\n");
217 return PTR_ERR(compo->clk_compo_main);
218 }
219
220 compo->clk_compo_aux = devm_clk_get(dev, "compo_aux");
221 if (IS_ERR(compo->clk_compo_aux)) {
222 DRM_ERROR("Cannot get compo_aux clock\n");
223 return PTR_ERR(compo->clk_compo_aux);
224 }
225
226 compo->clk_pix_main = devm_clk_get(dev, "pix_main");
227 if (IS_ERR(compo->clk_pix_main)) {
228 DRM_ERROR("Cannot get pix_main clock\n");
229 return PTR_ERR(compo->clk_pix_main);
230 }
231
232 compo->clk_pix_aux = devm_clk_get(dev, "pix_aux");
233 if (IS_ERR(compo->clk_pix_aux)) {
234 DRM_ERROR("Cannot get pix_aux clock\n");
235 return PTR_ERR(compo->clk_pix_aux);
236 }
237
238 /* Get reset resources */
239 compo->rst_main = devm_reset_control_get_shared(dev, "compo-main");
240 /* Take compo main out of reset */
241 if (!IS_ERR(compo->rst_main))
242 reset_control_deassert(compo->rst_main);
243
244 compo->rst_aux = devm_reset_control_get_shared(dev, "compo-aux");
245 /* Take compo aux out of reset */
246 if (!IS_ERR(compo->rst_aux))
247 reset_control_deassert(compo->rst_aux);
248
249 vtg_np = of_parse_phandle(pdev->dev.of_node, "st,vtg", 0);
250 if (vtg_np)
251 compo->vtg[STI_MIXER_MAIN] = of_vtg_find(vtg_np);
252 of_node_put(vtg_np);
253
254 vtg_np = of_parse_phandle(pdev->dev.of_node, "st,vtg", 1);
255 if (vtg_np)
256 compo->vtg[STI_MIXER_AUX] = of_vtg_find(vtg_np);
257 of_node_put(vtg_np);
258
259 platform_set_drvdata(pdev, compo);
260
261 return component_add(&pdev->dev, &sti_compositor_ops);
262 }
263
sti_compositor_remove(struct platform_device * pdev)264 static int sti_compositor_remove(struct platform_device *pdev)
265 {
266 component_del(&pdev->dev, &sti_compositor_ops);
267 return 0;
268 }
269
270 struct platform_driver sti_compositor_driver = {
271 .driver = {
272 .name = "sti-compositor",
273 .of_match_table = compositor_of_match,
274 },
275 .probe = sti_compositor_probe,
276 .remove = sti_compositor_remove,
277 };
278
279 MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
280 MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
281 MODULE_LICENSE("GPL");
282