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
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2017-2020, The Linux Foundation. All rights reserved.
*/
#include <drm/drm_atomic_helper.h>
#include <drm/drm_atomic.h>
#include <drm/drm_crtc.h>
#include "msm_drv.h"
#include "msm_kms.h"
#include "dp_drm.h"
struct dp_connector {
struct drm_connector base;
struct msm_dp *dp_display;
};
#define to_dp_connector(x) container_of(x, struct dp_connector, base)
/**
* dp_connector_detect - callback to determine if connector is connected
* @conn: Pointer to drm connector structure
* @force: Force detect setting from drm framework
* Returns: Connector 'is connected' status
*/
static enum drm_connector_status dp_connector_detect(struct drm_connector *conn,
bool force)
{
struct msm_dp *dp;
dp = to_dp_connector(conn)->dp_display;
DRM_DEBUG_DP("is_connected = %s\n",
(dp->is_connected) ? "true" : "false");
return (dp->is_connected) ? connector_status_connected :
connector_status_disconnected;
}
/**
* dp_connector_get_modes - callback to add drm modes via drm_mode_probed_add()
* @connector: Pointer to drm connector structure
* Returns: Number of modes added
*/
static int dp_connector_get_modes(struct drm_connector *connector)
{
int rc = 0;
struct msm_dp *dp;
struct dp_display_mode *dp_mode = NULL;
struct drm_display_mode *m, drm_mode;
if (!connector)
return 0;
dp = to_dp_connector(connector)->dp_display;
dp_mode = kzalloc(sizeof(*dp_mode), GFP_KERNEL);
if (!dp_mode)
return 0;
/* pluggable case assumes EDID is read when HPD */
if (dp->is_connected) {
/*
*The get_modes() function might return one mode that is stored
* in dp_mode when compliance test is in progress. If not, the
* return value is equal to the total number of modes supported
* by the sink
*/
rc = dp_display_get_modes(dp, dp_mode);
if (rc <= 0) {
DRM_ERROR("failed to get DP sink modes, rc=%d\n", rc);
kfree(dp_mode);
return rc;
}
if (dp_mode->drm_mode.clock) { /* valid DP mode */
memset(&drm_mode, 0x0, sizeof(drm_mode));
drm_mode_copy(&drm_mode, &dp_mode->drm_mode);
m = drm_mode_duplicate(connector->dev, &drm_mode);
if (!m) {
DRM_ERROR("failed to add mode %ux%u\n",
drm_mode.hdisplay,
drm_mode.vdisplay);
kfree(dp_mode);
return 0;
}
drm_mode_probed_add(connector, m);
}
} else {
DRM_DEBUG_DP("No sink connected\n");
}
kfree(dp_mode);
return rc;
}
/**
* dp_connector_mode_valid - callback to determine if specified mode is valid
* @connector: Pointer to drm connector structure
* @mode: Pointer to drm mode structure
* Returns: Validity status for specified mode
*/
static enum drm_mode_status dp_connector_mode_valid(
struct drm_connector *connector,
struct drm_display_mode *mode)
{
struct msm_dp *dp_disp;
dp_disp = to_dp_connector(connector)->dp_display;
if ((dp_disp->max_pclk_khz <= 0) ||
(dp_disp->max_pclk_khz > DP_MAX_PIXEL_CLK_KHZ) ||
(mode->clock > dp_disp->max_pclk_khz))
return MODE_BAD;
return dp_display_validate_mode(dp_disp, mode->clock);
}
static const struct drm_connector_funcs dp_connector_funcs = {
.detect = dp_connector_detect,
.fill_modes = drm_helper_probe_single_connector_modes,
.destroy = drm_connector_cleanup,
.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 dp_connector_helper_funcs = {
.get_modes = dp_connector_get_modes,
.mode_valid = dp_connector_mode_valid,
};
/* connector initialization */
struct drm_connector *dp_drm_connector_init(struct msm_dp *dp_display)
{
struct drm_connector *connector = NULL;
struct dp_connector *dp_connector;
int ret;
dp_connector = devm_kzalloc(dp_display->drm_dev->dev,
sizeof(*dp_connector),
GFP_KERNEL);
if (!dp_connector)
return ERR_PTR(-ENOMEM);
dp_connector->dp_display = dp_display;
connector = &dp_connector->base;
ret = drm_connector_init(dp_display->drm_dev, connector,
&dp_connector_funcs,
DRM_MODE_CONNECTOR_DisplayPort);
if (ret)
return ERR_PTR(ret);
drm_connector_helper_add(connector, &dp_connector_helper_funcs);
/*
* Enable HPD to let hpd event is handled when cable is connected.
*/
connector->polled = DRM_CONNECTOR_POLL_HPD;
drm_connector_attach_encoder(connector, dp_display->encoder);
return connector;
}
|
