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path: root/drivers/gpu/drm/sti/sti_compositor.c
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-rw-r--r--drivers/gpu/drm/sti/sti_compositor.c281
1 files changed, 281 insertions, 0 deletions
diff --git a/drivers/gpu/drm/sti/sti_compositor.c b/drivers/gpu/drm/sti/sti_compositor.c
new file mode 100644
index 000000000000..390d93e9a06c
--- /dev/null
+++ b/drivers/gpu/drm/sti/sti_compositor.c
@@ -0,0 +1,281 @@
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_drm_crtc.h"
18#include "sti_drm_drv.h"
19#include "sti_drm_plane.h"
20#include "sti_gdp.h"
21#include "sti_vtg.h"
22
23/*
24 * stiH407 compositor properties
25 */
26struct sti_compositor_data stih407_compositor_data = {
27 .nb_subdev = 6,
28 .subdev_desc = {
29 {STI_GPD_SUBDEV, (int)STI_GDP_0, 0x100},
30 {STI_GPD_SUBDEV, (int)STI_GDP_1, 0x200},
31 {STI_GPD_SUBDEV, (int)STI_GDP_2, 0x300},
32 {STI_GPD_SUBDEV, (int)STI_GDP_3, 0x400},
33 {STI_VID_SUBDEV, (int)STI_VID_0, 0x700},
34 {STI_MIXER_MAIN_SUBDEV, STI_MIXER_MAIN, 0xC00}
35 },
36};
37
38/*
39 * stiH416 compositor properties
40 * Note:
41 * on stih416 MIXER_AUX has a different base address from MIXER_MAIN
42 * Moreover, GDPx is different for Main and Aux Mixer. So this subdev map does
43 * not fit for stiH416 if we want to enable the MIXER_AUX.
44 */
45struct sti_compositor_data stih416_compositor_data = {
46 .nb_subdev = 3,
47 .subdev_desc = {
48 {STI_GPD_SUBDEV, (int)STI_GDP_0, 0x100},
49 {STI_GPD_SUBDEV, (int)STI_GDP_1, 0x200},
50 {STI_MIXER_MAIN_SUBDEV, STI_MIXER_MAIN, 0xC00}
51 },
52};
53
54static int sti_compositor_init_subdev(struct sti_compositor *compo,
55 struct sti_compositor_subdev_descriptor *desc,
56 unsigned int array_size)
57{
58 unsigned int i, mixer_id = 0, layer_id = 0;
59
60 for (i = 0; i < array_size; i++) {
61 switch (desc[i].type) {
62 case STI_MIXER_MAIN_SUBDEV:
63 case STI_MIXER_AUX_SUBDEV:
64 compo->mixer[mixer_id++] =
65 sti_mixer_create(compo->dev, desc[i].id,
66 compo->regs + desc[i].offset);
67 break;
68 case STI_GPD_SUBDEV:
69 case STI_VID_SUBDEV:
70 compo->layer[layer_id++] =
71 sti_layer_create(compo->dev, desc[i].id,
72 compo->regs + desc[i].offset);
73 break;
74 /* case STI_CURSOR_SUBDEV : TODO */
75 default:
76 DRM_ERROR("Unknow subdev compoment type\n");
77 return 1;
78 }
79
80 }
81 compo->nb_mixers = mixer_id;
82 compo->nb_layers = layer_id;
83
84 return 0;
85}
86
87static int sti_compositor_bind(struct device *dev, struct device *master,
88 void *data)
89{
90 struct sti_compositor *compo = dev_get_drvdata(dev);
91 struct drm_device *drm_dev = data;
92 unsigned int i, crtc = 0, plane = 0;
93 struct sti_drm_private *dev_priv = drm_dev->dev_private;
94 struct drm_plane *cursor = NULL;
95 struct drm_plane *primary = NULL;
96
97 dev_priv->compo = compo;
98
99 for (i = 0; i < compo->nb_layers; i++) {
100 if (compo->layer[i]) {
101 enum sti_layer_desc desc = compo->layer[i]->desc;
102 enum sti_layer_type type = desc & STI_LAYER_TYPE_MASK;
103 enum drm_plane_type plane_type = DRM_PLANE_TYPE_OVERLAY;
104
105 if (compo->mixer[crtc])
106 plane_type = DRM_PLANE_TYPE_PRIMARY;
107
108 switch (type) {
109 case STI_CUR:
110 cursor = sti_drm_plane_init(drm_dev,
111 compo->layer[i],
112 (1 << crtc) - 1,
113 DRM_PLANE_TYPE_CURSOR);
114 break;
115 case STI_GDP:
116 case STI_VID:
117 primary = sti_drm_plane_init(drm_dev,
118 compo->layer[i],
119 (1 << crtc) - 1, plane_type);
120 plane++;
121 break;
122 case STI_BCK:
123 break;
124 }
125
126 /* The first planes are reserved for primary planes*/
127 if (compo->mixer[crtc]) {
128 sti_drm_crtc_init(drm_dev, compo->mixer[crtc],
129 primary, cursor);
130 crtc++;
131 cursor = NULL;
132 }
133 }
134 }
135
136 drm_vblank_init(drm_dev, crtc);
137 /* Allow usage of vblank without having to call drm_irq_install */
138 drm_dev->irq_enabled = 1;
139
140 DRM_DEBUG_DRIVER("Initialized %d DRM CRTC(s) and %d DRM plane(s)\n",
141 crtc, plane);
142 DRM_DEBUG_DRIVER("DRM plane(s) for VID/VDP not created yet\n");
143
144 return 0;
145}
146
147static void sti_compositor_unbind(struct device *dev, struct device *master,
148 void *data)
149{
150 /* do nothing */
151}
152
153static const struct component_ops sti_compositor_ops = {
154 .bind = sti_compositor_bind,
155 .unbind = sti_compositor_unbind,
156};
157
158static const struct of_device_id compositor_of_match[] = {
159 {
160 .compatible = "st,stih416-compositor",
161 .data = &stih416_compositor_data,
162 }, {
163 .compatible = "st,stih407-compositor",
164 .data = &stih407_compositor_data,
165 }, {
166 /* end node */
167 }
168};
169MODULE_DEVICE_TABLE(of, compositor_of_match);
170
171static int sti_compositor_probe(struct platform_device *pdev)
172{
173 struct device *dev = &pdev->dev;
174 struct device_node *np = dev->of_node;
175 struct device_node *vtg_np;
176 struct sti_compositor *compo;
177 struct resource *res;
178 int err;
179
180 compo = devm_kzalloc(dev, sizeof(*compo), GFP_KERNEL);
181 if (!compo) {
182 DRM_ERROR("Failed to allocate compositor context\n");
183 return -ENOMEM;
184 }
185 compo->dev = dev;
186 compo->vtg_vblank_nb.notifier_call = sti_drm_crtc_vblank_cb;
187
188 /* populate data structure depending on compatibility */
189 BUG_ON(!of_match_node(compositor_of_match, np)->data);
190
191 memcpy(&compo->data, of_match_node(compositor_of_match, np)->data,
192 sizeof(struct sti_compositor_data));
193
194 /* Get Memory ressources */
195 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
196 if (res == NULL) {
197 DRM_ERROR("Get memory resource failed\n");
198 return -ENXIO;
199 }
200 compo->regs = devm_ioremap(dev, res->start, resource_size(res));
201 if (compo->regs == NULL) {
202 DRM_ERROR("Register mapping failed\n");
203 return -ENXIO;
204 }
205
206 /* Get clock resources */
207 compo->clk_compo_main = devm_clk_get(dev, "compo_main");
208 if (IS_ERR(compo->clk_compo_main)) {
209 DRM_ERROR("Cannot get compo_main clock\n");
210 return PTR_ERR(compo->clk_compo_main);
211 }
212
213 compo->clk_compo_aux = devm_clk_get(dev, "compo_aux");
214 if (IS_ERR(compo->clk_compo_aux)) {
215 DRM_ERROR("Cannot get compo_aux clock\n");
216 return PTR_ERR(compo->clk_compo_aux);
217 }
218
219 compo->clk_pix_main = devm_clk_get(dev, "pix_main");
220 if (IS_ERR(compo->clk_pix_main)) {
221 DRM_ERROR("Cannot get pix_main clock\n");
222 return PTR_ERR(compo->clk_pix_main);
223 }
224
225 compo->clk_pix_aux = devm_clk_get(dev, "pix_aux");
226 if (IS_ERR(compo->clk_pix_aux)) {
227 DRM_ERROR("Cannot get pix_aux clock\n");
228 return PTR_ERR(compo->clk_pix_aux);
229 }
230
231 /* Get reset resources */
232 compo->rst_main = devm_reset_control_get(dev, "compo-main");
233 /* Take compo main out of reset */
234 if (!IS_ERR(compo->rst_main))
235 reset_control_deassert(compo->rst_main);
236
237 compo->rst_aux = devm_reset_control_get(dev, "compo-aux");
238 /* Take compo aux out of reset */
239 if (!IS_ERR(compo->rst_aux))
240 reset_control_deassert(compo->rst_aux);
241
242 vtg_np = of_parse_phandle(pdev->dev.of_node, "st,vtg", 0);
243 if (vtg_np)
244 compo->vtg_main = of_vtg_find(vtg_np);
245
246 vtg_np = of_parse_phandle(pdev->dev.of_node, "st,vtg", 1);
247 if (vtg_np)
248 compo->vtg_aux = of_vtg_find(vtg_np);
249
250 /* Initialize compositor subdevices */
251 err = sti_compositor_init_subdev(compo, compo->data.subdev_desc,
252 compo->data.nb_subdev);
253 if (err)
254 return err;
255
256 platform_set_drvdata(pdev, compo);
257
258 return component_add(&pdev->dev, &sti_compositor_ops);
259}
260
261static int sti_compositor_remove(struct platform_device *pdev)
262{
263 component_del(&pdev->dev, &sti_compositor_ops);
264 return 0;
265}
266
267static struct platform_driver sti_compositor_driver = {
268 .driver = {
269 .name = "sti-compositor",
270 .owner = THIS_MODULE,
271 .of_match_table = compositor_of_match,
272 },
273 .probe = sti_compositor_probe,
274 .remove = sti_compositor_remove,
275};
276
277module_platform_driver(sti_compositor_driver);
278
279MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
280MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
281MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2026-01-08 07:49:39 -0500