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/of.h>
13#include <linux/platform_device.h>
14#include <linux/reset.h>
15
16#include <drm/drm_device.h>
17#include <drm/drm_print.h>
18#include <drm/drm_vblank.h>
19
20#include "sti_compositor.h"
21#include "sti_crtc.h"
22#include "sti_cursor.h"
23#include "sti_drv.h"
24#include "sti_gdp.h"
25#include "sti_plane.h"
26#include "sti_vid.h"
27#include "sti_vtg.h"
28
29/*
30 * stiH407 compositor properties
31 */
32static const struct sti_compositor_data stih407_compositor_data = {
33	.nb_subdev = 8,
34	.subdev_desc = {
35			{STI_CURSOR_SUBDEV, (int)STI_CURSOR, 0x000},
36			{STI_GPD_SUBDEV, (int)STI_GDP_0, 0x100},
37			{STI_GPD_SUBDEV, (int)STI_GDP_1, 0x200},
38			{STI_GPD_SUBDEV, (int)STI_GDP_2, 0x300},
39			{STI_GPD_SUBDEV, (int)STI_GDP_3, 0x400},
40			{STI_VID_SUBDEV, (int)STI_HQVDP_0, 0x700},
41			{STI_MIXER_MAIN_SUBDEV, STI_MIXER_MAIN, 0xC00},
42			{STI_MIXER_AUX_SUBDEV, STI_MIXER_AUX, 0xD00},
43	},
44};
45
46void sti_compositor_debugfs_init(struct sti_compositor *compo,
47				 struct drm_minor *minor)
48{
49	unsigned int i;
50
51	for (i = 0; i < STI_MAX_VID; i++)
52		if (compo->vid[i])
53			vid_debugfs_init(compo->vid[i], minor);
54
55	for (i = 0; i < STI_MAX_MIXER; i++)
56		if (compo->mixer[i])
57			sti_mixer_debugfs_init(compo->mixer[i], minor);
58}
59
60static int sti_compositor_bind(struct device *dev,
61			       struct device *master,
62			       void *data)
63{
64	struct sti_compositor *compo = dev_get_drvdata(dev);
65	struct drm_device *drm_dev = data;
66	unsigned int i, mixer_id = 0, vid_id = 0, crtc_id = 0;
67	struct sti_private *dev_priv = drm_dev->dev_private;
68	struct drm_plane *cursor = NULL;
69	struct drm_plane *primary = NULL;
70	struct sti_compositor_subdev_descriptor *desc = compo->data.subdev_desc;
71	unsigned int array_size = compo->data.nb_subdev;
72
73	dev_priv->compo = compo;
74
75	/* Register mixer subdev and video subdev first */
76	for (i = 0; i < array_size; i++) {
77		switch (desc[i].type) {
78		case STI_VID_SUBDEV:
79			compo->vid[vid_id++] =
80			    sti_vid_create(compo->dev, drm_dev, desc[i].id,
81					   compo->regs + desc[i].offset);
82			break;
83		case STI_MIXER_MAIN_SUBDEV:
84		case STI_MIXER_AUX_SUBDEV:
85			compo->mixer[mixer_id++] =
86			    sti_mixer_create(compo->dev, drm_dev, desc[i].id,
87					     compo->regs + desc[i].offset);
88			break;
89		case STI_GPD_SUBDEV:
90		case STI_CURSOR_SUBDEV:
91			/* Nothing to do, wait for the second round */
92			break;
93		default:
94			DRM_ERROR("Unknown subdev component type\n");
95			return 1;
96		}
97	}
98
99	/* Register the other subdevs, create crtc and planes */
100	for (i = 0; i < array_size; i++) {
101		enum drm_plane_type plane_type = DRM_PLANE_TYPE_OVERLAY;
102
103		if (crtc_id < mixer_id)
104			plane_type = DRM_PLANE_TYPE_PRIMARY;
105
106		switch (desc[i].type) {
107		case STI_MIXER_MAIN_SUBDEV:
108		case STI_MIXER_AUX_SUBDEV:
109		case STI_VID_SUBDEV:
110			/* Nothing to do, already done at the first round */
111			break;
112		case STI_CURSOR_SUBDEV:
113			cursor = sti_cursor_create(drm_dev, compo->dev,
114						   desc[i].id,
115						   compo->regs + desc[i].offset,
116						   1);
117			if (!cursor) {
118				DRM_ERROR("Can't create CURSOR plane\n");
119				break;
120			}
121			break;
122		case STI_GPD_SUBDEV:
123			primary = sti_gdp_create(drm_dev, compo->dev,
124						 desc[i].id,
125						 compo->regs + desc[i].offset,
126						 (1 << mixer_id) - 1,
127						 plane_type);
128			if (!primary) {
129				DRM_ERROR("Can't create GDP plane\n");
130				break;
131			}
132			break;
133		default:
134			DRM_ERROR("Unknown subdev component type\n");
135			return 1;
136		}
137
138		/* The first planes are reserved for primary planes*/
139		if (crtc_id < mixer_id && primary) {
140			sti_crtc_init(drm_dev, compo->mixer[crtc_id],
141				      primary, cursor);
142			crtc_id++;
143			cursor = NULL;
144			primary = NULL;
145		}
146	}
147
148	drm_vblank_init(drm_dev, crtc_id);
149
150	return 0;
151}
152
153static void sti_compositor_unbind(struct device *dev, struct device *master,
154	void *data)
155{
156	/* do nothing */
157}
158
159static const struct component_ops sti_compositor_ops = {
160	.bind	= sti_compositor_bind,
161	.unbind	= sti_compositor_unbind,
162};
163
164static const struct of_device_id compositor_of_match[] = {
165	{
166		.compatible = "st,stih407-compositor",
167		.data = &stih407_compositor_data,
168	}, {
169		/* end node */
170	}
171};
172MODULE_DEVICE_TABLE(of, compositor_of_match);
173
174static int sti_compositor_probe(struct platform_device *pdev)
175{
176	struct device *dev = &pdev->dev;
177	struct device_node *np = dev->of_node;
178	struct device_node *vtg_np;
179	struct sti_compositor *compo;
180	struct resource *res;
181	unsigned int i;
182
183	compo = devm_kzalloc(dev, sizeof(*compo), GFP_KERNEL);
184	if (!compo) {
185		DRM_ERROR("Failed to allocate compositor context\n");
186		return -ENOMEM;
187	}
188	compo->dev = dev;
189	for (i = 0; i < STI_MAX_MIXER; i++)
190		compo->vtg_vblank_nb[i].notifier_call = sti_crtc_vblank_cb;
191
192	/* populate data structure depending on compatibility */
193	BUG_ON(!of_match_node(compositor_of_match, np)->data);
194
195	memcpy(&compo->data, of_match_node(compositor_of_match, np)->data,
196	       sizeof(struct sti_compositor_data));
197
198	/* Get Memory ressources */
199	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
200	if (res == NULL) {
201		DRM_ERROR("Get memory resource failed\n");
202		return -ENXIO;
203	}
204	compo->regs = devm_ioremap(dev, res->start, resource_size(res));
205	if (compo->regs == NULL) {
206		DRM_ERROR("Register mapping failed\n");
207		return -ENXIO;
208	}
209
210	/* Get clock resources */
211	compo->clk_compo_main = devm_clk_get(dev, "compo_main");
212	if (IS_ERR(compo->clk_compo_main)) {
213		DRM_ERROR("Cannot get compo_main clock\n");
214		return PTR_ERR(compo->clk_compo_main);
215	}
216
217	compo->clk_compo_aux = devm_clk_get(dev, "compo_aux");
218	if (IS_ERR(compo->clk_compo_aux)) {
219		DRM_ERROR("Cannot get compo_aux clock\n");
220		return PTR_ERR(compo->clk_compo_aux);
221	}
222
223	compo->clk_pix_main = devm_clk_get(dev, "pix_main");
224	if (IS_ERR(compo->clk_pix_main)) {
225		DRM_ERROR("Cannot get pix_main clock\n");
226		return PTR_ERR(compo->clk_pix_main);
227	}
228
229	compo->clk_pix_aux = devm_clk_get(dev, "pix_aux");
230	if (IS_ERR(compo->clk_pix_aux)) {
231		DRM_ERROR("Cannot get pix_aux clock\n");
232		return PTR_ERR(compo->clk_pix_aux);
233	}
234
235	/* Get reset resources */
236	compo->rst_main = devm_reset_control_get_shared(dev, "compo-main");
237	/* Take compo main out of reset */
238	if (!IS_ERR(compo->rst_main))
239		reset_control_deassert(compo->rst_main);
240
241	compo->rst_aux = devm_reset_control_get_shared(dev, "compo-aux");
242	/* Take compo aux out of reset */
243	if (!IS_ERR(compo->rst_aux))
244		reset_control_deassert(compo->rst_aux);
245
246	vtg_np = of_parse_phandle(pdev->dev.of_node, "st,vtg", 0);
247	if (vtg_np)
248		compo->vtg[STI_MIXER_MAIN] = of_vtg_find(vtg_np);
249	of_node_put(vtg_np);
250
251	vtg_np = of_parse_phandle(pdev->dev.of_node, "st,vtg", 1);
252	if (vtg_np)
253		compo->vtg[STI_MIXER_AUX] = of_vtg_find(vtg_np);
254	of_node_put(vtg_np);
255
256	platform_set_drvdata(pdev, compo);
257
258	return component_add(&pdev->dev, &sti_compositor_ops);
259}
260
261static void sti_compositor_remove(struct platform_device *pdev)
262{
263	component_del(&pdev->dev, &sti_compositor_ops);
264}
265
266struct 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_new = sti_compositor_remove,
273};
274
275MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
276MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
277MODULE_LICENSE("GPL");
278