summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c
blob: 39802c0539b6ba5e2a3361f1441c20da2c5de2ec (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
278
279
280
281
282
283
284
285
/*
 * Copyright (C) 2014 Traphandler
 * Copyright (C) 2014 Free Electrons
 * Copyright (C) 2014 Atmel
 *
 * Author: Jean-Jacques Hiblot <jjhiblot@traphandler.com>
 * Author: Boris BREZILLON <boris.brezillon@free-electrons.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <linux/of_graph.h>

#include <drm/drmP.h>
#include <drm/drm_panel.h>

#include "atmel_hlcdc_dc.h"

/**
 * Atmel HLCDC RGB connector structure
 *
 * This structure stores RGB slave device information.
 *
 * @connector: DRM connector
 * @encoder: DRM encoder
 * @dc: pointer to the atmel_hlcdc_dc structure
 * @panel: panel connected on the RGB output
 */
struct atmel_hlcdc_rgb_output {
	struct drm_connector connector;
	struct drm_encoder encoder;
	struct atmel_hlcdc_dc *dc;
	struct drm_panel *panel;
};

static inline struct atmel_hlcdc_rgb_output *
drm_connector_to_atmel_hlcdc_rgb_output(struct drm_connector *connector)
{
	return container_of(connector, struct atmel_hlcdc_rgb_output,
			    connector);
}

static inline struct atmel_hlcdc_rgb_output *
drm_encoder_to_atmel_hlcdc_rgb_output(struct drm_encoder *encoder)
{
	return container_of(encoder, struct atmel_hlcdc_rgb_output, encoder);
}

static void atmel_hlcdc_rgb_encoder_enable(struct drm_encoder *encoder)
{
	struct atmel_hlcdc_rgb_output *rgb =
			drm_encoder_to_atmel_hlcdc_rgb_output(encoder);

	if (rgb->panel) {
		drm_panel_prepare(rgb->panel);
		drm_panel_enable(rgb->panel);
	}
}

static void atmel_hlcdc_rgb_encoder_disable(struct drm_encoder *encoder)
{
	struct atmel_hlcdc_rgb_output *rgb =
			drm_encoder_to_atmel_hlcdc_rgb_output(encoder);

	if (rgb->panel) {
		drm_panel_disable(rgb->panel);
		drm_panel_unprepare(rgb->panel);
	}
}

static const struct drm_encoder_helper_funcs atmel_hlcdc_panel_encoder_helper_funcs = {
	.disable = atmel_hlcdc_rgb_encoder_disable,
	.enable = atmel_hlcdc_rgb_encoder_enable,
};

static void atmel_hlcdc_rgb_encoder_destroy(struct drm_encoder *encoder)
{
	drm_encoder_cleanup(encoder);
	memset(encoder, 0, sizeof(*encoder));
}

static const struct drm_encoder_funcs atmel_hlcdc_panel_encoder_funcs = {
	.destroy = atmel_hlcdc_rgb_encoder_destroy,
};

static int atmel_hlcdc_panel_get_modes(struct drm_connector *connector)
{
	struct atmel_hlcdc_rgb_output *rgb =
			drm_connector_to_atmel_hlcdc_rgb_output(connector);

	if (rgb->panel)
		return rgb->panel->funcs->get_modes(rgb->panel);

	return 0;
}

static int atmel_hlcdc_rgb_mode_valid(struct drm_connector *connector,
				      struct drm_display_mode *mode)
{
	struct atmel_hlcdc_rgb_output *rgb =
			drm_connector_to_atmel_hlcdc_rgb_output(connector);

	return atmel_hlcdc_dc_mode_valid(rgb->dc, mode);
}



static struct drm_encoder *
atmel_hlcdc_rgb_best_encoder(struct drm_connector *connector)
{
	struct atmel_hlcdc_rgb_output *rgb =
			drm_connector_to_atmel_hlcdc_rgb_output(connector);

	return &rgb->encoder;
}

static const struct drm_connector_helper_funcs atmel_hlcdc_panel_connector_helper_funcs = {
	.get_modes = atmel_hlcdc_panel_get_modes,
	.mode_valid = atmel_hlcdc_rgb_mode_valid,
	.best_encoder = atmel_hlcdc_rgb_best_encoder,
};

static enum drm_connector_status
atmel_hlcdc_panel_connector_detect(struct drm_connector *connector, bool force)
{
	struct atmel_hlcdc_rgb_output *rgb =
			drm_connector_to_atmel_hlcdc_rgb_output(connector);

	if (rgb->panel)
		return connector_status_connected;

	return connector_status_disconnected;
}

static void
atmel_hlcdc_panel_connector_destroy(struct drm_connector *connector)
{
	struct atmel_hlcdc_rgb_output *rgb =
			drm_connector_to_atmel_hlcdc_rgb_output(connector);

	if (rgb->panel)
		drm_panel_detach(rgb->panel);

	drm_connector_cleanup(connector);
}

static const struct drm_connector_funcs atmel_hlcdc_panel_connector_funcs = {
	.dpms = drm_atomic_helper_connector_dpms,
	.detect = atmel_hlcdc_panel_connector_detect,
	.fill_modes = drm_helper_probe_single_connector_modes,
	.destroy = atmel_hlcdc_panel_connector_destroy,
	.reset = drm_atomic_helper_connector_reset,
	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};

static int atmel_hlcdc_check_endpoint(struct drm_device *dev,
				      const struct of_endpoint *ep)
{
	struct device_node *np;
	void *obj;

	np = of_graph_get_remote_port_parent(ep->local_node);

	obj = of_drm_find_panel(np);
	if (!obj)
		obj = of_drm_find_bridge(np);

	of_node_put(np);

	return obj ? 0 : -EPROBE_DEFER;
}

static int atmel_hlcdc_attach_endpoint(struct drm_device *dev,
				       const struct of_endpoint *ep)
{
	struct atmel_hlcdc_dc *dc = dev->dev_private;
	struct atmel_hlcdc_rgb_output *output;
	struct device_node *np;
	struct drm_panel *panel;
	struct drm_bridge *bridge;
	int ret;

	output = devm_kzalloc(dev->dev, sizeof(*output), GFP_KERNEL);
	if (!output)
		return -EINVAL;

	output->dc = dc;

	drm_encoder_helper_add(&output->encoder,
			       &atmel_hlcdc_panel_encoder_helper_funcs);
	ret = drm_encoder_init(dev, &output->encoder,
			       &atmel_hlcdc_panel_encoder_funcs,
			       DRM_MODE_ENCODER_NONE, NULL);
	if (ret)
		return ret;

	output->encoder.possible_crtcs = 0x1;

	np = of_graph_get_remote_port_parent(ep->local_node);

	ret = -EPROBE_DEFER;

	panel = of_drm_find_panel(np);
	if (panel) {
		of_node_put(np);
		output->connector.dpms = DRM_MODE_DPMS_OFF;
		output->connector.polled = DRM_CONNECTOR_POLL_CONNECT;
		drm_connector_helper_add(&output->connector,
				&atmel_hlcdc_panel_connector_helper_funcs);
		ret = drm_connector_init(dev, &output->connector,
					 &atmel_hlcdc_panel_connector_funcs,
					 DRM_MODE_CONNECTOR_Unknown);
		if (ret)
			goto err_encoder_cleanup;

		drm_mode_connector_attach_encoder(&output->connector,
						  &output->encoder);

		ret = drm_panel_attach(panel, &output->connector);
		if (ret) {
			drm_connector_cleanup(&output->connector);
			goto err_encoder_cleanup;
		}

		output->panel = panel;

		return 0;
	}

	bridge = of_drm_find_bridge(np);
	of_node_put(np);

	if (bridge) {
		output->encoder.bridge = bridge;
		bridge->encoder = &output->encoder;
		ret = drm_bridge_attach(dev, bridge);
		if (!ret)
			return 0;
	}

err_encoder_cleanup:
	drm_encoder_cleanup(&output->encoder);

	return ret;
}

int atmel_hlcdc_create_outputs(struct drm_device *dev)
{
	struct device_node *ep_np = NULL;
	struct of_endpoint ep;
	int ret;

	for_each_endpoint_of_node(dev->dev->of_node, ep_np) {
		ret = of_graph_parse_endpoint(ep_np, &ep);
		if (!ret)
			ret = atmel_hlcdc_check_endpoint(dev, &ep);

		of_node_put(ep_np);
		if (ret)
			return ret;
	}

	for_each_endpoint_of_node(dev->dev->of_node, ep_np) {
		ret = of_graph_parse_endpoint(ep_np, &ep);
		if (!ret)
			ret = atmel_hlcdc_attach_endpoint(dev, &ep);

		of_node_put(ep_np);
		if (ret)
			return ret;
	}

	return 0;
}