summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/meson/meson_venc_cvbs.c
blob: 00775b397dbac3ee7f2a3ffa416b8ac55d247ce5 (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
286
287
288
289
/*
 * Copyright (C) 2016 BayLibre, SAS
 * Author: Neil Armstrong <narmstrong@baylibre.com>
 * Copyright (C) 2015 Amlogic, Inc. All rights reserved.
 * Copyright (C) 2014 Endless Mobile
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * 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/>.
 *
 * Written by:
 *     Jasper St. Pierre <jstpierre@mecheye.net>
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of_graph.h>

#include <drm/drmP.h>
#include <drm/drm_edid.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_atomic_helper.h>

#include "meson_venc_cvbs.h"
#include "meson_venc.h"
#include "meson_vclk.h"
#include "meson_registers.h"

/* HHI VDAC Registers */
#define HHI_VDAC_CNTL0		0x2F4 /* 0xbd offset in data sheet */
#define HHI_VDAC_CNTL1		0x2F8 /* 0xbe offset in data sheet */

struct meson_venc_cvbs {
	struct drm_encoder	encoder;
	struct drm_connector	connector;
	struct meson_drm	*priv;
};
#define encoder_to_meson_venc_cvbs(x) \
	container_of(x, struct meson_venc_cvbs, encoder)

#define connector_to_meson_venc_cvbs(x) \
	container_of(x, struct meson_venc_cvbs, connector)

/* Supported Modes */

struct meson_cvbs_mode meson_cvbs_modes[MESON_CVBS_MODES_COUNT] = {
	{ /* PAL */
		.enci = &meson_cvbs_enci_pal,
		.mode = {
			DRM_MODE("720x576i", DRM_MODE_TYPE_DRIVER, 13500,
				 720, 732, 795, 864, 0, 576, 580, 586, 625, 0,
				 DRM_MODE_FLAG_INTERLACE),
			.vrefresh = 50,
			.picture_aspect_ratio = HDMI_PICTURE_ASPECT_4_3,
		},
	},
	{ /* NTSC */
		.enci = &meson_cvbs_enci_ntsc,
		.mode = {
			DRM_MODE("720x480i", DRM_MODE_TYPE_DRIVER, 13500,
				720, 739, 801, 858, 0, 480, 488, 494, 525, 0,
				DRM_MODE_FLAG_INTERLACE),
			.vrefresh = 60,
			.picture_aspect_ratio = HDMI_PICTURE_ASPECT_4_3,
		},
	},
};

/* Connector */

static void meson_cvbs_connector_destroy(struct drm_connector *connector)
{
	drm_connector_cleanup(connector);
}

static enum drm_connector_status
meson_cvbs_connector_detect(struct drm_connector *connector, bool force)
{
	/* FIXME: Add load-detect or jack-detect if possible */
	return connector_status_connected;
}

static int meson_cvbs_connector_get_modes(struct drm_connector *connector)
{
	struct drm_device *dev = connector->dev;
	struct drm_display_mode *mode;
	int i;

	for (i = 0; i < MESON_CVBS_MODES_COUNT; ++i) {
		struct meson_cvbs_mode *meson_mode = &meson_cvbs_modes[i];

		mode = drm_mode_duplicate(dev, &meson_mode->mode);
		if (!mode) {
			DRM_ERROR("Failed to create a new display mode\n");
			return 0;
		}

		drm_mode_probed_add(connector, mode);
	}

	return i;
}

static int meson_cvbs_connector_mode_valid(struct drm_connector *connector,
					   struct drm_display_mode *mode)
{
	/* Validate the modes added in get_modes */
	return MODE_OK;
}

static const struct drm_connector_funcs meson_cvbs_connector_funcs = {
	.dpms			= drm_atomic_helper_connector_dpms,
	.detect			= meson_cvbs_connector_detect,
	.fill_modes		= drm_helper_probe_single_connector_modes,
	.destroy		= meson_cvbs_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 const
struct drm_connector_helper_funcs meson_cvbs_connector_helper_funcs = {
	.get_modes	= meson_cvbs_connector_get_modes,
	.mode_valid	= meson_cvbs_connector_mode_valid,
};

/* Encoder */

static void meson_venc_cvbs_encoder_destroy(struct drm_encoder *encoder)
{
	drm_encoder_cleanup(encoder);
}

static const struct drm_encoder_funcs meson_venc_cvbs_encoder_funcs = {
	.destroy        = meson_venc_cvbs_encoder_destroy,
};

static int meson_venc_cvbs_encoder_atomic_check(struct drm_encoder *encoder,
					struct drm_crtc_state *crtc_state,
					struct drm_connector_state *conn_state)
{
	int i;

	for (i = 0; i < MESON_CVBS_MODES_COUNT; ++i) {
		struct meson_cvbs_mode *meson_mode = &meson_cvbs_modes[i];

		if (drm_mode_equal(&crtc_state->mode, &meson_mode->mode))
			return 0;
	}

	return -EINVAL;
}

static void meson_venc_cvbs_encoder_disable(struct drm_encoder *encoder)
{
	struct meson_venc_cvbs *meson_venc_cvbs =
					encoder_to_meson_venc_cvbs(encoder);
	struct meson_drm *priv = meson_venc_cvbs->priv;

	/* Disable CVBS VDAC */
	regmap_write(priv->hhi, HHI_VDAC_CNTL0, 0);
	regmap_write(priv->hhi, HHI_VDAC_CNTL1, 8);
}

static void meson_venc_cvbs_encoder_enable(struct drm_encoder *encoder)
{
	struct meson_venc_cvbs *meson_venc_cvbs =
					encoder_to_meson_venc_cvbs(encoder);
	struct meson_drm *priv = meson_venc_cvbs->priv;

	/* VDAC0 source is not from ATV */
	writel_bits_relaxed(BIT(5), 0, priv->io_base + _REG(VENC_VDAC_DACSEL0));

	if (meson_vpu_is_compatible(priv, "amlogic,meson-gxbb-vpu"))
		regmap_write(priv->hhi, HHI_VDAC_CNTL0, 1);
	else if (meson_vpu_is_compatible(priv, "amlogic,meson-gxm-vpu") ||
		 meson_vpu_is_compatible(priv, "amlogic,meson-gxl-vpu"))
		regmap_write(priv->hhi, HHI_VDAC_CNTL0, 0xf0001);

	regmap_write(priv->hhi, HHI_VDAC_CNTL1, 0);
}

static void meson_venc_cvbs_encoder_mode_set(struct drm_encoder *encoder,
				   struct drm_display_mode *mode,
				   struct drm_display_mode *adjusted_mode)
{
	struct meson_venc_cvbs *meson_venc_cvbs =
					encoder_to_meson_venc_cvbs(encoder);
	struct meson_drm *priv = meson_venc_cvbs->priv;
	int i;

	for (i = 0; i < MESON_CVBS_MODES_COUNT; ++i) {
		struct meson_cvbs_mode *meson_mode = &meson_cvbs_modes[i];

		if (drm_mode_equal(mode, &meson_mode->mode)) {
			meson_venci_cvbs_mode_set(priv,
						  meson_mode->enci);

			/* Setup 27MHz vclk2 for ENCI and VDAC */
			meson_vclk_setup(priv, MESON_VCLK_TARGET_CVBS,
					 MESON_VCLK_CVBS, MESON_VCLK_CVBS,
					 MESON_VCLK_CVBS, true);
			break;
		}
	}
}

static const struct drm_encoder_helper_funcs
				meson_venc_cvbs_encoder_helper_funcs = {
	.atomic_check	= meson_venc_cvbs_encoder_atomic_check,
	.disable	= meson_venc_cvbs_encoder_disable,
	.enable		= meson_venc_cvbs_encoder_enable,
	.mode_set	= meson_venc_cvbs_encoder_mode_set,
};

static bool meson_venc_cvbs_connector_is_available(struct meson_drm *priv)
{
	struct device_node *remote;

	remote = of_graph_get_remote_node(priv->dev->of_node, 0, 0);
	if (!remote)
		return false;

	of_node_put(remote);
	return true;
}

int meson_venc_cvbs_create(struct meson_drm *priv)
{
	struct drm_device *drm = priv->drm;
	struct meson_venc_cvbs *meson_venc_cvbs;
	struct drm_connector *connector;
	struct drm_encoder *encoder;
	int ret;

	if (!meson_venc_cvbs_connector_is_available(priv)) {
		dev_info(drm->dev, "CVBS Output connector not available\n");
		return 0;
	}

	meson_venc_cvbs = devm_kzalloc(priv->dev, sizeof(*meson_venc_cvbs),
				       GFP_KERNEL);
	if (!meson_venc_cvbs)
		return -ENOMEM;

	meson_venc_cvbs->priv = priv;
	encoder = &meson_venc_cvbs->encoder;
	connector = &meson_venc_cvbs->connector;

	/* Connector */

	drm_connector_helper_add(connector,
				 &meson_cvbs_connector_helper_funcs);

	ret = drm_connector_init(drm, connector, &meson_cvbs_connector_funcs,
				 DRM_MODE_CONNECTOR_Composite);
	if (ret) {
		dev_err(priv->dev, "Failed to init CVBS connector\n");
		return ret;
	}

	connector->interlace_allowed = 1;

	/* Encoder */

	drm_encoder_helper_add(encoder, &meson_venc_cvbs_encoder_helper_funcs);

	ret = drm_encoder_init(drm, encoder, &meson_venc_cvbs_encoder_funcs,
			       DRM_MODE_ENCODER_TVDAC, "meson_venc_cvbs");
	if (ret) {
		dev_err(priv->dev, "Failed to init CVBS encoder\n");
		return ret;
	}

	encoder->possible_crtcs = BIT(0);

	drm_mode_connector_attach_encoder(connector, encoder);

	return 0;
}