1 /*-
2 * Copyright (c) 2015 Michal Meloun
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/param.h>
28 #include <sys/systm.h>
29 #include <sys/bus.h>
30 #include <sys/kernel.h>
31 #include <sys/malloc.h>
32
33 #include <machine/bus.h>
34
35 #include <dev/clk/clk.h>
36 #include <dev/drm2/drmP.h>
37 #include <dev/drm2/drm_crtc.h>
38 #include <dev/drm2/drm_crtc_helper.h>
39 #include <dev/drm2/drm_edid.h>
40 #include <dev/drm2/drm_fb_helper.h>
41 #include <dev/gpio/gpiobusvar.h>
42 #include <dev/ofw/ofw_bus_subr.h>
43
44 #include <arm/nvidia/drm2/tegra_drm.h>
45
46 #include <dt-bindings/gpio/gpio.h>
47
48 int
tegra_drm_connector_get_modes(struct drm_connector * connector)49 tegra_drm_connector_get_modes(struct drm_connector *connector)
50 {
51 struct tegra_drm_encoder *output;
52 struct edid *edid = NULL;
53 int rv;
54
55 output = container_of(connector, struct tegra_drm_encoder,
56 connector);
57
58 /* Panel is first */
59 if (output->panel != NULL) {
60 /* XXX panel parsing */
61 return (0);
62 }
63
64 /* static EDID is second*/
65 edid = output->edid;
66
67 /* EDID from monitor is last */
68 if (edid == NULL)
69 edid = drm_get_edid(connector, output->ddc);
70
71 if (edid == NULL)
72 return (0);
73
74 /* Process EDID */
75 drm_mode_connector_update_edid_property(connector, edid);
76 rv = drm_add_edid_modes(connector, edid);
77 drm_edid_to_eld(connector, edid);
78 return (rv);
79 }
80
81 struct drm_encoder *
tegra_drm_connector_best_encoder(struct drm_connector * connector)82 tegra_drm_connector_best_encoder(struct drm_connector *connector)
83 {
84 struct tegra_drm_encoder *output;
85
86 output = container_of(connector, struct tegra_drm_encoder,
87 connector);
88
89 return &(output->encoder);
90 }
91
92 enum drm_connector_status
tegra_drm_connector_detect(struct drm_connector * connector,bool force)93 tegra_drm_connector_detect(struct drm_connector *connector, bool force)
94 {
95 struct tegra_drm_encoder *output;
96 bool active;
97 int rv;
98
99 output = container_of(connector, struct tegra_drm_encoder,
100 connector);
101 if (output->gpio_hpd == NULL) {
102 return ((output->panel != NULL) ?
103 connector_status_connected:
104 connector_status_disconnected);
105 }
106
107 rv = gpio_pin_is_active(output->gpio_hpd, &active);
108 if (rv != 0) {
109 device_printf(output->dev, " GPIO read failed: %d\n", rv);
110 return (connector_status_unknown);
111 }
112
113 return (active ?
114 connector_status_connected : connector_status_disconnected);
115 }
116
117 int
tegra_drm_encoder_attach(struct tegra_drm_encoder * output,phandle_t node)118 tegra_drm_encoder_attach(struct tegra_drm_encoder *output, phandle_t node)
119 {
120 int rv;
121 phandle_t ddc;
122
123 /* XXX parse output panel here */
124
125 rv = OF_getencprop_alloc(node, "nvidia,edid",
126 (void **)&output->edid);
127
128 /* EDID exist but have invalid size */
129 if ((rv >= 0) && (rv != sizeof(struct edid))) {
130 device_printf(output->dev,
131 "Malformed \"nvidia,edid\" property\n");
132 if (output->edid != NULL)
133 free(output->edid, M_OFWPROP);
134 return (ENXIO);
135 }
136
137 gpio_pin_get_by_ofw_property(output->dev, node, "nvidia,hpd-gpio",
138 &output->gpio_hpd);
139 ddc = 0;
140 OF_getencprop(node, "nvidia,ddc-i2c-bus", &ddc, sizeof(ddc));
141 if (ddc > 0)
142 output->ddc = OF_device_from_xref(ddc);
143 if ((output->edid == NULL) && (output->ddc == NULL))
144 return (ENXIO);
145
146 if (output->gpio_hpd != NULL) {
147 output->connector.polled =
148 // DRM_CONNECTOR_POLL_HPD;
149 DRM_CONNECTOR_POLL_DISCONNECT |
150 DRM_CONNECTOR_POLL_CONNECT;
151 }
152
153 return (0);
154 }
155
tegra_drm_encoder_init(struct tegra_drm_encoder * output,struct tegra_drm * drm)156 int tegra_drm_encoder_init(struct tegra_drm_encoder *output,
157 struct tegra_drm *drm)
158 {
159
160 if (output->panel) {
161 /* attach panel */
162 }
163 return (0);
164 }
165
tegra_drm_encoder_exit(struct tegra_drm_encoder * output,struct tegra_drm * drm)166 int tegra_drm_encoder_exit(struct tegra_drm_encoder *output,
167 struct tegra_drm *drm)
168 {
169
170 if (output->panel) {
171 /* detach panel */
172 }
173 return (0);
174 }
175