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
|
// SPDX-License-Identifier: GPL-2.0-or-later
// Copyright (c) 2024 Hisilicon Limited.
#include <linux/io.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_simple_kms_helper.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_modes.h>
#include <drm/drm_drv.h>
#include <drm/drm_edid.h>
#include "hibmc_drm_drv.h"
#include "dp/dp_hw.h"
#define DP_MASKED_SINK_HPD_PLUG_INT BIT(2)
static int hibmc_dp_connector_get_modes(struct drm_connector *connector)
{
const struct drm_edid *drm_edid;
int count;
drm_edid = drm_edid_read(connector);
drm_edid_connector_update(connector, drm_edid);
count = drm_edid_connector_add_modes(connector);
drm_edid_free(drm_edid);
return count;
}
static int hibmc_dp_detect(struct drm_connector *connector,
struct drm_modeset_acquire_ctx *ctx, bool force)
{
mdelay(200);
return drm_connector_helper_detect_from_ddc(connector, ctx, force);
}
static const struct drm_connector_helper_funcs hibmc_dp_conn_helper_funcs = {
.get_modes = hibmc_dp_connector_get_modes,
.detect_ctx = hibmc_dp_detect,
};
static int hibmc_dp_late_register(struct drm_connector *connector)
{
struct hibmc_dp *dp = to_hibmc_dp(connector);
hibmc_dp_enable_int(dp);
return drm_dp_aux_register(&dp->aux);
}
static void hibmc_dp_early_unregister(struct drm_connector *connector)
{
struct hibmc_dp *dp = to_hibmc_dp(connector);
drm_dp_aux_unregister(&dp->aux);
hibmc_dp_disable_int(dp);
}
static const struct drm_connector_funcs hibmc_dp_conn_funcs = {
.reset = drm_atomic_helper_connector_reset,
.fill_modes = drm_helper_probe_single_connector_modes,
.destroy = drm_connector_cleanup,
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
.late_register = hibmc_dp_late_register,
.early_unregister = hibmc_dp_early_unregister,
.debugfs_init = hibmc_debugfs_init,
};
static inline int hibmc_dp_prepare(struct hibmc_dp *dp, struct drm_display_mode *mode)
{
int ret;
hibmc_dp_display_en(dp, false);
ret = hibmc_dp_mode_set(dp, mode);
if (ret)
drm_err(dp->drm_dev, "hibmc dp mode set failed: %d\n", ret);
return ret;
}
static void hibmc_dp_encoder_enable(struct drm_encoder *drm_encoder,
struct drm_atomic_state *state)
{
struct hibmc_dp *dp = container_of(drm_encoder, struct hibmc_dp, encoder);
struct drm_display_mode *mode = &drm_encoder->crtc->state->mode;
if (hibmc_dp_prepare(dp, mode))
return;
hibmc_dp_display_en(dp, true);
}
static void hibmc_dp_encoder_disable(struct drm_encoder *drm_encoder,
struct drm_atomic_state *state)
{
struct hibmc_dp *dp = container_of(drm_encoder, struct hibmc_dp, encoder);
hibmc_dp_display_en(dp, false);
}
static const struct drm_encoder_helper_funcs hibmc_dp_encoder_helper_funcs = {
.atomic_enable = hibmc_dp_encoder_enable,
.atomic_disable = hibmc_dp_encoder_disable,
};
irqreturn_t hibmc_dp_hpd_isr(int irq, void *arg)
{
struct drm_device *dev = (struct drm_device *)arg;
struct hibmc_drm_private *priv = to_hibmc_drm_private(dev);
int idx;
if (!drm_dev_enter(dev, &idx))
return -ENODEV;
if (priv->dp.irq_status & DP_MASKED_SINK_HPD_PLUG_INT) {
drm_dbg_dp(&priv->dev, "HPD IN isr occur!\n");
hibmc_dp_hpd_cfg(&priv->dp);
} else {
drm_dbg_dp(&priv->dev, "HPD OUT isr occur!\n");
hibmc_dp_reset_link(&priv->dp);
}
if (dev->registered)
drm_connector_helper_hpd_irq_event(&priv->dp.connector);
drm_dev_exit(idx);
return IRQ_HANDLED;
}
int hibmc_dp_init(struct hibmc_drm_private *priv)
{
struct drm_device *dev = &priv->dev;
struct drm_crtc *crtc = &priv->crtc;
struct hibmc_dp *dp = &priv->dp;
struct drm_connector *connector = &dp->connector;
struct drm_encoder *encoder = &dp->encoder;
int ret;
dp->mmio = priv->mmio;
dp->drm_dev = dev;
ret = hibmc_dp_hw_init(&priv->dp);
if (ret) {
drm_err(dev, "hibmc dp hw init failed: %d\n", ret);
return ret;
}
hibmc_dp_display_en(&priv->dp, false);
encoder->possible_crtcs = drm_crtc_mask(crtc);
ret = drmm_encoder_init(dev, encoder, NULL, DRM_MODE_ENCODER_TMDS, NULL);
if (ret) {
drm_err(dev, "init dp encoder failed: %d\n", ret);
return ret;
}
drm_encoder_helper_add(encoder, &hibmc_dp_encoder_helper_funcs);
ret = drm_connector_init_with_ddc(dev, connector, &hibmc_dp_conn_funcs,
DRM_MODE_CONNECTOR_DisplayPort, &dp->aux.ddc);
if (ret) {
drm_err(dev, "init dp connector failed: %d\n", ret);
return ret;
}
drm_connector_helper_add(connector, &hibmc_dp_conn_helper_funcs);
drm_connector_attach_encoder(connector, encoder);
connector->polled = DRM_CONNECTOR_POLL_HPD;
return 0;
}
|
