1 /*
2 * Copyright (c) 2014-2015, The Linux Foundation. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 and
6 * only version 2 as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 */
13
14 #include "drm/drm_edid.h"
15 #include "msm_kms.h"
16 #include "edp.h"
17
18 struct edp_connector {
19 struct drm_connector base;
20 struct msm_edp *edp;
21 };
22 #define to_edp_connector(x) container_of(x, struct edp_connector, base)
23
edp_connector_detect(struct drm_connector * connector,bool force)24 static enum drm_connector_status edp_connector_detect(
25 struct drm_connector *connector, bool force)
26 {
27 struct edp_connector *edp_connector = to_edp_connector(connector);
28 struct msm_edp *edp = edp_connector->edp;
29
30 DBG("");
31 return msm_edp_ctrl_panel_connected(edp->ctrl) ?
32 connector_status_connected : connector_status_disconnected;
33 }
34
edp_connector_destroy(struct drm_connector * connector)35 static void edp_connector_destroy(struct drm_connector *connector)
36 {
37 struct edp_connector *edp_connector = to_edp_connector(connector);
38
39 DBG("");
40 drm_connector_unregister(connector);
41 drm_connector_cleanup(connector);
42
43 kfree(edp_connector);
44 }
45
edp_connector_get_modes(struct drm_connector * connector)46 static int edp_connector_get_modes(struct drm_connector *connector)
47 {
48 struct edp_connector *edp_connector = to_edp_connector(connector);
49 struct msm_edp *edp = edp_connector->edp;
50
51 struct edid *drm_edid = NULL;
52 int ret = 0;
53
54 DBG("");
55 ret = msm_edp_ctrl_get_panel_info(edp->ctrl, connector, &drm_edid);
56 if (ret)
57 return ret;
58
59 drm_mode_connector_update_edid_property(connector, drm_edid);
60 if (drm_edid)
61 ret = drm_add_edid_modes(connector, drm_edid);
62
63 return ret;
64 }
65
edp_connector_mode_valid(struct drm_connector * connector,struct drm_display_mode * mode)66 static int edp_connector_mode_valid(struct drm_connector *connector,
67 struct drm_display_mode *mode)
68 {
69 struct edp_connector *edp_connector = to_edp_connector(connector);
70 struct msm_edp *edp = edp_connector->edp;
71 struct msm_drm_private *priv = connector->dev->dev_private;
72 struct msm_kms *kms = priv->kms;
73 long actual, requested;
74
75 requested = 1000 * mode->clock;
76 actual = kms->funcs->round_pixclk(kms,
77 requested, edp_connector->edp->encoder);
78
79 DBG("requested=%ld, actual=%ld", requested, actual);
80 if (actual != requested)
81 return MODE_CLOCK_RANGE;
82
83 if (!msm_edp_ctrl_pixel_clock_valid(
84 edp->ctrl, mode->clock, NULL, NULL))
85 return MODE_CLOCK_RANGE;
86
87 /* Invalidate all modes if color format is not supported */
88 if (connector->display_info.bpc > 8)
89 return MODE_BAD;
90
91 return MODE_OK;
92 }
93
94 static struct drm_encoder *
edp_connector_best_encoder(struct drm_connector * connector)95 edp_connector_best_encoder(struct drm_connector *connector)
96 {
97 struct edp_connector *edp_connector = to_edp_connector(connector);
98
99 DBG("");
100 return edp_connector->edp->encoder;
101 }
102
103 static const struct drm_connector_funcs edp_connector_funcs = {
104 .dpms = drm_atomic_helper_connector_dpms,
105 .detect = edp_connector_detect,
106 .fill_modes = drm_helper_probe_single_connector_modes,
107 .destroy = edp_connector_destroy,
108 .reset = drm_atomic_helper_connector_reset,
109 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
110 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
111 };
112
113 static const struct drm_connector_helper_funcs edp_connector_helper_funcs = {
114 .get_modes = edp_connector_get_modes,
115 .mode_valid = edp_connector_mode_valid,
116 .best_encoder = edp_connector_best_encoder,
117 };
118
119 /* initialize connector */
msm_edp_connector_init(struct msm_edp * edp)120 struct drm_connector *msm_edp_connector_init(struct msm_edp *edp)
121 {
122 struct drm_connector *connector = NULL;
123 struct edp_connector *edp_connector;
124 int ret;
125
126 edp_connector = kzalloc(sizeof(*edp_connector), GFP_KERNEL);
127 if (!edp_connector) {
128 ret = -ENOMEM;
129 goto fail;
130 }
131
132 edp_connector->edp = edp;
133
134 connector = &edp_connector->base;
135
136 ret = drm_connector_init(edp->dev, connector, &edp_connector_funcs,
137 DRM_MODE_CONNECTOR_eDP);
138 if (ret)
139 goto fail;
140
141 drm_connector_helper_add(connector, &edp_connector_helper_funcs);
142
143 /* We don't support HPD, so only poll status until connected. */
144 connector->polled = DRM_CONNECTOR_POLL_CONNECT;
145
146 /* Display driver doesn't support interlace now. */
147 connector->interlace_allowed = false;
148 connector->doublescan_allowed = false;
149
150 ret = drm_connector_register(connector);
151 if (ret)
152 goto fail;
153
154 drm_mode_connector_attach_encoder(connector, edp->encoder);
155
156 return connector;
157
158 fail:
159 if (connector)
160 edp_connector_destroy(connector);
161
162 return ERR_PTR(ret);
163 }
164