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/cdefs.h>
28 #include <sys/param.h>
29 #include <sys/systm.h>
30 #include <sys/bus.h>
31 #include <sys/kernel.h>
32 #include <sys/malloc.h>
33
34 #include <machine/bus.h>
35
36 #include <dev/extres/clk/clk.h>
37 #include <dev/drm2/drmP.h>
38 #include <dev/drm2/drm_crtc.h>
39 #include <dev/drm2/drm_crtc_helper.h>
40 #include <dev/drm2/drm_edid.h>
41 #include <dev/drm2/drm_fb_helper.h>
42 #include <dev/gpio/gpiobusvar.h>
43 #include <dev/ofw/ofw_bus_subr.h>
44
45 #include <arm/nvidia/drm2/tegra_drm.h>
46
47 #include <dt-bindings/gpio/gpio.h>
48
49 int
tegra_drm_connector_get_modes(struct drm_connector * connector)50 tegra_drm_connector_get_modes(struct drm_connector *connector)
51 {
52 struct tegra_drm_encoder *output;
53 struct edid *edid = NULL;
54 int rv;
55
56 output = container_of(connector, struct tegra_drm_encoder,
57 connector);
58
59 /* Panel is first */
60 if (output->panel != NULL) {
61 /* XXX panel parsing */
62 return (0);
63 }
64
65 /* static EDID is second*/
66 edid = output->edid;
67
68 /* EDID from monitor is last */
69 if (edid == NULL)
70 edid = drm_get_edid(connector, output->ddc);
71
72 if (edid == NULL)
73 return (0);
74
75 /* Process EDID */
76 drm_mode_connector_update_edid_property(connector, edid);
77 rv = drm_add_edid_modes(connector, edid);
78 drm_edid_to_eld(connector, edid);
79 return (rv);
80 }
81
82 struct drm_encoder *
tegra_drm_connector_best_encoder(struct drm_connector * connector)83 tegra_drm_connector_best_encoder(struct drm_connector *connector)
84 {
85 struct tegra_drm_encoder *output;
86
87 output = container_of(connector, struct tegra_drm_encoder,
88 connector);
89
90 return &(output->encoder);
91 }
92
93 enum drm_connector_status
tegra_drm_connector_detect(struct drm_connector * connector,bool force)94 tegra_drm_connector_detect(struct drm_connector *connector, bool force)
95 {
96 struct tegra_drm_encoder *output;
97 bool active;
98 int rv;
99
100 output = container_of(connector, struct tegra_drm_encoder,
101 connector);
102 if (output->gpio_hpd == NULL) {
103 return ((output->panel != NULL) ?
104 connector_status_connected:
105 connector_status_disconnected);
106 }
107
108 rv = gpio_pin_is_active(output->gpio_hpd, &active);
109 if (rv != 0) {
110 device_printf(output->dev, " GPIO read failed: %d\n", rv);
111 return (connector_status_unknown);
112 }
113
114 return (active ?
115 connector_status_connected : connector_status_disconnected);
116 }
117
118 int
tegra_drm_encoder_attach(struct tegra_drm_encoder * output,phandle_t node)119 tegra_drm_encoder_attach(struct tegra_drm_encoder *output, phandle_t node)
120 {
121 int rv;
122 phandle_t ddc;
123
124 /* XXX parse output panel here */
125
126 rv = OF_getencprop_alloc(node, "nvidia,edid",
127 (void **)&output->edid);
128
129 /* EDID exist but have invalid size */
130 if ((rv >= 0) && (rv != sizeof(struct edid))) {
131 device_printf(output->dev,
132 "Malformed \"nvidia,edid\" property\n");
133 if (output->edid != NULL)
134 free(output->edid, M_OFWPROP);
135 return (ENXIO);
136 }
137
138 gpio_pin_get_by_ofw_property(output->dev, node, "nvidia,hpd-gpio",
139 &output->gpio_hpd);
140 ddc = 0;
141 OF_getencprop(node, "nvidia,ddc-i2c-bus", &ddc, sizeof(ddc));
142 if (ddc > 0)
143 output->ddc = OF_device_from_xref(ddc);
144 if ((output->edid == NULL) && (output->ddc == NULL))
145 return (ENXIO);
146
147 if (output->gpio_hpd != NULL) {
148 output->connector.polled =
149 // DRM_CONNECTOR_POLL_HPD;
150 DRM_CONNECTOR_POLL_DISCONNECT |
151 DRM_CONNECTOR_POLL_CONNECT;
152 }
153
154 return (0);
155 }
156
tegra_drm_encoder_init(struct tegra_drm_encoder * output,struct tegra_drm * drm)157 int tegra_drm_encoder_init(struct tegra_drm_encoder *output,
158 struct tegra_drm *drm)
159 {
160
161 if (output->panel) {
162 /* attach panel */
163 }
164 return (0);
165 }
166
tegra_drm_encoder_exit(struct tegra_drm_encoder * output,struct tegra_drm * drm)167 int tegra_drm_encoder_exit(struct tegra_drm_encoder *output,
168 struct tegra_drm *drm)
169 {
170
171 if (output->panel) {
172 /* detach panel */
173 }
174 return (0);
175 }
176