aboutsummaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/nouveau/nouveau_hdmi.c
blob: 59ea1c14eca0363b7f132abc4c86242e68b82e0f (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
/*
 * Copyright 2011 Red Hat Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Authors: Ben Skeggs
 */

#include "drmP.h"
#include "nouveau_drv.h"
#include "nouveau_connector.h"
#include "nouveau_encoder.h"
#include "nouveau_crtc.h"

static bool
hdmi_sor(struct drm_encoder *encoder)
{
	struct drm_nouveau_private *dev_priv = encoder->dev->dev_private;
	if (dev_priv->chipset < 0xa3)
		return false;
	return true;
}

static inline u32
hdmi_base(struct drm_encoder *encoder)
{
	struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
	struct nouveau_crtc *nv_crtc = nouveau_crtc(nv_encoder->crtc);
	if (!hdmi_sor(encoder))
		return 0x616500 + (nv_crtc->index * 0x800);
	return 0x61c500 + (nv_encoder->or * 0x800);
}

static void
hdmi_wr32(struct drm_encoder *encoder, u32 reg, u32 val)
{
	nv_wr32(encoder->dev, hdmi_base(encoder) + reg, val);
}

static u32
hdmi_rd32(struct drm_encoder *encoder, u32 reg)
{
	return nv_rd32(encoder->dev, hdmi_base(encoder) + reg);
}

static u32
hdmi_mask(struct drm_encoder *encoder, u32 reg, u32 mask, u32 val)
{
	u32 tmp = hdmi_rd32(encoder, reg);
	hdmi_wr32(encoder, reg, (tmp & ~mask) | val);
	return tmp;
}

static void
nouveau_audio_disconnect(struct drm_encoder *encoder)
{
	struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
	struct drm_device *dev = encoder->dev;
	u32 or = nv_encoder->or * 0x800;

	if (hdmi_sor(encoder)) {
		nv_mask(dev, 0x61c448 + or, 0x00000003, 0x00000000);
	}
}

static void
nouveau_audio_mode_set(struct drm_encoder *encoder,
		       struct drm_display_mode *mode)
{
	struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
	struct nouveau_connector *nv_connector;
	struct drm_device *dev = encoder->dev;
	u32 or = nv_encoder->or * 0x800;
	int i;

	nv_connector = nouveau_encoder_connector_get(nv_encoder);
	if (!drm_detect_monitor_audio(nv_connector->edid)) {
		nouveau_audio_disconnect(encoder);
		return;
	}

	if (hdmi_sor(encoder)) {
		nv_mask(dev, 0x61c448 + or, 0x00000001, 0x00000001);

		drm_edid_to_eld(&nv_connector->base, nv_connector->edid);
		if (nv_connector->base.eld[0]) {
			u8 *eld = nv_connector->base.eld;
			for (i = 0; i < eld[2] * 4; i++)
				nv_wr32(dev, 0x61c440 + or, (i << 8) | eld[i]);
			for (i = eld[2] * 4; i < 0x60; i++)
				nv_wr32(dev, 0x61c440 + or, (i << 8) | 0x00);
			nv_mask(dev, 0x61c448 + or, 0x00000002, 0x00000002);
		}
	}
}

static void
nouveau_hdmi_infoframe(struct drm_encoder *encoder, u32 ctrl, u8 *frame)
{
	/* calculate checksum for the infoframe */
	u8 sum = 0, i;
	for (i = 0; i < frame[2]; i++)
		sum += frame[i];
	frame[3] = 256 - sum;

	/* disable infoframe, and write header */
	hdmi_mask(encoder, ctrl + 0x00, 0x00000001, 0x00000000);
	hdmi_wr32(encoder, ctrl + 0x08, *(u32 *)frame & 0xffffff);

	/* register scans tell me the audio infoframe has only one set of
	 * subpack regs, according to tegra (gee nvidia, it'd be nice if we
	 * could get those docs too!), the hdmi block pads out the rest of
	 * the packet on its own.
	 */
	if (ctrl == 0x020)
		frame[2] = 6;

	/* write out checksum and data, weird weird 7 byte register pairs */
	for (i = 0; i < frame[2] + 1; i += 7) {
		u32 rsubpack = ctrl + 0x0c + ((i / 7) * 8);
		u32 *subpack = (u32 *)&frame[3 + i];
		hdmi_wr32(encoder, rsubpack + 0, subpack[0]);
		hdmi_wr32(encoder, rsubpack + 4, subpack[1] & 0xffffff);
	}

	/* enable the infoframe */
	hdmi_mask(encoder, ctrl, 0x00000001, 0x00000001);
}

static void
nouveau_hdmi_video_infoframe(struct drm_encoder *encoder,
			     struct drm_display_mode *mode)
{
	const u8 Y = 0, A = 0, B = 0, S = 0, C = 0, M = 0, R = 0;
	const u8 ITC = 0, EC = 0, Q = 0, SC = 0, VIC = 0, PR = 0;
	const u8 bar_top = 0, bar_bottom = 0, bar_left = 0, bar_right = 0;
	u8 frame[20];

	frame[0x00] = 0x82; /* AVI infoframe */
	frame[0x01] = 0x02; /* version */
	frame[0x02] = 0x0d; /* length */
	frame[0x03] = 0x00;
	frame[0x04] = (Y << 5) | (A << 4) | (B << 2) | S;
	frame[0x05] = (C << 6) | (M << 4) | R;
	frame[0x06] = (ITC << 7) | (EC << 4) | (Q << 2) | SC;
	frame[0x07] = VIC;
	frame[0x08] = PR;
	frame[0x09] = bar_top & 0xff;
	frame[0x0a] = bar_top >> 8;
	frame[0x0b] = bar_bottom & 0xff;
	frame[0x0c] = bar_bottom >> 8;
	frame[0x0d] = bar_left & 0xff;
	frame[0x0e] = bar_left >> 8;
	frame[0x0f] = bar_right & 0xff;
	frame[0x10] = bar_right >> 8;
	frame[0x11] = 0x00;
	frame[0x12] = 0x00;
	frame[0x13] = 0x00;

	nouveau_hdmi_infoframe(encoder, 0x020, frame);
}

static void
nouveau_hdmi_audio_infoframe(struct drm_encoder *encoder,
			     struct drm_display_mode *mode)
{
	const u8 CT = 0x00, CC = 0x01, ceaSS = 0x00, SF = 0x00, FMT = 0x00;
	const u8 CA = 0x00, DM_INH = 0, LSV = 0x00;
	u8 frame[12];

	frame[0x00] = 0x84;	/* Audio infoframe */
	frame[0x01] = 0x01;	/* version */
	frame[0x02] = 0x0a;	/* length */
	frame[0x03] = 0x00;
	frame[0x04] = (CT << 4) | CC;
	frame[0x05] = (SF << 2) | ceaSS;
	frame[0x06] = FMT;
	frame[0x07] = CA;
	frame[0x08] = (DM_INH << 7) | (LSV << 3);
	frame[0x09] = 0x00;
	frame[0x0a] = 0x00;
	frame[0x0b] = 0x00;

	nouveau_hdmi_infoframe(encoder, 0x000, frame);
}

static void
nouveau_hdmi_disconnect(struct drm_encoder *encoder)
{
	nouveau_audio_disconnect(encoder);

	/* disable audio and avi infoframes */
	hdmi_mask(encoder, 0x000, 0x00000001, 0x00000000);
	hdmi_mask(encoder, 0x020, 0x00000001, 0x00000000);

	/* disable hdmi */
	hdmi_mask(encoder, 0x0a4, 0x40000000, 0x00000000);
}

void
nouveau_hdmi_mode_set(struct drm_encoder *encoder,
		      struct drm_display_mode *mode)
{
	struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
	struct nouveau_connector *nv_connector;
	struct drm_device *dev = encoder->dev;
	u32 max_ac_packet, rekey;

	nv_connector = nouveau_encoder_connector_get(nv_encoder);
	if (!mode || !nv_connector || !nv_connector->edid ||
	    !drm_detect_hdmi_monitor(nv_connector->edid)) {
		nouveau_hdmi_disconnect(encoder);
		return;
	}

	nouveau_hdmi_video_infoframe(encoder, mode);
	nouveau_hdmi_audio_infoframe(encoder, mode);

	hdmi_mask(encoder, 0x0d0, 0x00070001, 0x00010001); /* SPARE, HW_CTS */
	hdmi_mask(encoder, 0x068, 0x00010101, 0x00000000); /* ACR_CTRL, ?? */
	hdmi_mask(encoder, 0x078, 0x80000000, 0x80000000); /* ACR_0441_ENABLE */

	nv_mask(dev, 0x61733c, 0x00100000, 0x00100000); /* RESETF */
	nv_mask(dev, 0x61733c, 0x10000000, 0x10000000); /* LOOKUP_EN */
	nv_mask(dev, 0x61733c, 0x00100000, 0x00000000); /* !RESETF */

	/* value matches nvidia binary driver, and tegra constant */
	rekey = 56;

	max_ac_packet  = mode->htotal - mode->hdisplay;
	max_ac_packet -= rekey;
	max_ac_packet -= 18; /* constant from tegra */
	max_ac_packet /= 32;

	/* enable hdmi */
	hdmi_mask(encoder, 0x0a4, 0x5f1f003f, 0x40000000 | /* enable */
					      0x1f000000 | /* unknown */
					      max_ac_packet << 16 |
					      rekey);

	nouveau_audio_mode_set(encoder, mode);
}