summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/sti/sti_compositor.c
blob: 3d2fa3ab33dffece98b73d1c827b4512c4d07a36 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
/*
 * Copyright (C) STMicroelectronics SA 2014
 * Authors: Benjamin Gaignard <benjamin.gaignard@st.com>
 *          Fabien Dessenne <fabien.dessenne@st.com>
 *          for STMicroelectronics.
 * License terms:  GNU General Public License (GPL), version 2
 */

#include <linux/component.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/reset.h>

#include <drm/drmP.h>

#include "sti_compositor.h"
#include "sti_crtc.h"
#include "sti_cursor.h"
#include "sti_drv.h"
#include "sti_gdp.h"
#include "sti_plane.h"
#include "sti_vid.h"
#include "sti_vtg.h"

/*
 * stiH407 compositor properties
 */
struct sti_compositor_data stih407_compositor_data = {
	.nb_subdev = 8,
	.subdev_desc = {
			{STI_CURSOR_SUBDEV, (int)STI_CURSOR, 0x000},
			{STI_GPD_SUBDEV, (int)STI_GDP_0, 0x100},
			{STI_GPD_SUBDEV, (int)STI_GDP_1, 0x200},
			{STI_GPD_SUBDEV, (int)STI_GDP_2, 0x300},
			{STI_GPD_SUBDEV, (int)STI_GDP_3, 0x400},
			{STI_VID_SUBDEV, (int)STI_HQVDP_0, 0x700},
			{STI_MIXER_MAIN_SUBDEV, STI_MIXER_MAIN, 0xC00},
			{STI_MIXER_AUX_SUBDEV, STI_MIXER_AUX, 0xD00},
	},
};

/*
 * stiH416 compositor properties
 * Note:
 * on stih416 MIXER_AUX has a different base address from MIXER_MAIN
 * Moreover, GDPx is different for Main and Aux Mixer. So this subdev map does
 * not fit for stiH416 if we want to enable the MIXER_AUX.
 */
struct sti_compositor_data stih416_compositor_data = {
	.nb_subdev = 3,
	.subdev_desc = {
			{STI_GPD_SUBDEV, (int)STI_GDP_0, 0x100},
			{STI_GPD_SUBDEV, (int)STI_GDP_1, 0x200},
			{STI_MIXER_MAIN_SUBDEV, STI_MIXER_MAIN, 0xC00}
	},
};

static int sti_compositor_bind(struct device *dev,
			       struct device *master,
			       void *data)
{
	struct sti_compositor *compo = dev_get_drvdata(dev);
	struct drm_device *drm_dev = data;
	unsigned int i, mixer_id = 0, vid_id = 0, crtc_id = 0;
	struct sti_private *dev_priv = drm_dev->dev_private;
	struct drm_plane *cursor = NULL;
	struct drm_plane *primary = NULL;
	struct sti_compositor_subdev_descriptor *desc = compo->data.subdev_desc;
	unsigned int array_size = compo->data.nb_subdev;

	dev_priv->compo = compo;

	/* Register mixer subdev and video subdev first */
	for (i = 0; i < array_size; i++) {
		switch (desc[i].type) {
		case STI_VID_SUBDEV:
			compo->vid[vid_id++] =
			    sti_vid_create(compo->dev, drm_dev, desc[i].id,
					   compo->regs + desc[i].offset);
			break;
		case STI_MIXER_MAIN_SUBDEV:
		case STI_MIXER_AUX_SUBDEV:
			compo->mixer[mixer_id++] =
			    sti_mixer_create(compo->dev, drm_dev, desc[i].id,
					     compo->regs + desc[i].offset);
			break;
		case STI_GPD_SUBDEV:
		case STI_CURSOR_SUBDEV:
			/* Nothing to do, wait for the second round */
			break;
		default:
			DRM_ERROR("Unknow subdev compoment type\n");
			return 1;
		}
	}

	/* Register the other subdevs, create crtc and planes */
	for (i = 0; i < array_size; i++) {
		enum drm_plane_type plane_type = DRM_PLANE_TYPE_OVERLAY;

		if (crtc_id < mixer_id)
			plane_type = DRM_PLANE_TYPE_PRIMARY;

		switch (desc[i].type) {
		case STI_MIXER_MAIN_SUBDEV:
		case STI_MIXER_AUX_SUBDEV:
		case STI_VID_SUBDEV:
			/* Nothing to do, already done at the first round */
			break;
		case STI_CURSOR_SUBDEV:
			cursor = sti_cursor_create(drm_dev, compo->dev,
						   desc[i].id,
						   compo->regs + desc[i].offset,
						   1);
			if (!cursor) {
				DRM_ERROR("Can't create CURSOR plane\n");
				break;
			}
			break;
		case STI_GPD_SUBDEV:
			primary = sti_gdp_create(drm_dev, compo->dev,
						 desc[i].id,
						 compo->regs + desc[i].offset,
						 (1 << mixer_id) - 1,
						 plane_type);
			if (!primary) {
				DRM_ERROR("Can't create GDP plane\n");
				break;
			}
			break;
		default:
			DRM_ERROR("Unknown subdev compoment type\n");
			return 1;
		}

		/* The first planes are reserved for primary planes*/
		if (crtc_id < mixer_id && primary) {
			sti_crtc_init(drm_dev, compo->mixer[crtc_id],
				      primary, cursor);
			crtc_id++;
			cursor = NULL;
			primary = NULL;
		}
	}

	drm_vblank_init(drm_dev, crtc_id);
	/* Allow usage of vblank without having to call drm_irq_install */
	drm_dev->irq_enabled = 1;

	return 0;
}

static void sti_compositor_unbind(struct device *dev, struct device *master,
	void *data)
{
	/* do nothing */
}

static const struct component_ops sti_compositor_ops = {
	.bind	= sti_compositor_bind,
	.unbind	= sti_compositor_unbind,
};

static const struct of_device_id compositor_of_match[] = {
	{
		.compatible = "st,stih416-compositor",
		.data = &stih416_compositor_data,
	}, {
		.compatible = "st,stih407-compositor",
		.data = &stih407_compositor_data,
	}, {
		/* end node */
	}
};
MODULE_DEVICE_TABLE(of, compositor_of_match);

static int sti_compositor_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct device_node *np = dev->of_node;
	struct device_node *vtg_np;
	struct sti_compositor *compo;
	struct resource *res;

	compo = devm_kzalloc(dev, sizeof(*compo), GFP_KERNEL);
	if (!compo) {
		DRM_ERROR("Failed to allocate compositor context\n");
		return -ENOMEM;
	}
	compo->dev = dev;
	compo->vtg_vblank_nb.notifier_call = sti_crtc_vblank_cb;

	/* populate data structure depending on compatibility */
	BUG_ON(!of_match_node(compositor_of_match, np)->data);

	memcpy(&compo->data, of_match_node(compositor_of_match, np)->data,
	       sizeof(struct sti_compositor_data));

	/* Get Memory ressources */
	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (res == NULL) {
		DRM_ERROR("Get memory resource failed\n");
		return -ENXIO;
	}
	compo->regs = devm_ioremap(dev, res->start, resource_size(res));
	if (compo->regs == NULL) {
		DRM_ERROR("Register mapping failed\n");
		return -ENXIO;
	}

	/* Get clock resources */
	compo->clk_compo_main = devm_clk_get(dev, "compo_main");
	if (IS_ERR(compo->clk_compo_main)) {
		DRM_ERROR("Cannot get compo_main clock\n");
		return PTR_ERR(compo->clk_compo_main);
	}

	compo->clk_compo_aux = devm_clk_get(dev, "compo_aux");
	if (IS_ERR(compo->clk_compo_aux)) {
		DRM_ERROR("Cannot get compo_aux clock\n");
		return PTR_ERR(compo->clk_compo_aux);
	}

	compo->clk_pix_main = devm_clk_get(dev, "pix_main");
	if (IS_ERR(compo->clk_pix_main)) {
		DRM_ERROR("Cannot get pix_main clock\n");
		return PTR_ERR(compo->clk_pix_main);
	}

	compo->clk_pix_aux = devm_clk_get(dev, "pix_aux");
	if (IS_ERR(compo->clk_pix_aux)) {
		DRM_ERROR("Cannot get pix_aux clock\n");
		return PTR_ERR(compo->clk_pix_aux);
	}

	/* Get reset resources */
	compo->rst_main = devm_reset_control_get(dev, "compo-main");
	/* Take compo main out of reset */
	if (!IS_ERR(compo->rst_main))
		reset_control_deassert(compo->rst_main);

	compo->rst_aux = devm_reset_control_get(dev, "compo-aux");
	/* Take compo aux out of reset */
	if (!IS_ERR(compo->rst_aux))
		reset_control_deassert(compo->rst_aux);

	vtg_np = of_parse_phandle(pdev->dev.of_node, "st,vtg", 0);
	if (vtg_np)
		compo->vtg_main = of_vtg_find(vtg_np);

	vtg_np = of_parse_phandle(pdev->dev.of_node, "st,vtg", 1);
	if (vtg_np)
		compo->vtg_aux = of_vtg_find(vtg_np);

	platform_set_drvdata(pdev, compo);

	return component_add(&pdev->dev, &sti_compositor_ops);
}

static int sti_compositor_remove(struct platform_device *pdev)
{
	component_del(&pdev->dev, &sti_compositor_ops);
	return 0;
}

struct platform_driver sti_compositor_driver = {
	.driver = {
		.name = "sti-compositor",
		.of_match_table = compositor_of_match,
	},
	.probe = sti_compositor_probe,
	.remove = sti_compositor_remove,
};

MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
MODULE_LICENSE("GPL");