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1/*
2 * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
3 * Author: Rob Clark <rob@ti.com>
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published by
7 * the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program. If not, see <http://www.gnu.org/licenses/>.
16 */
17
18#include <drm/drm_atomic_helper.h>
19#include <drm/drm_crtc.h>
20#include <drm/drm_crtc_helper.h>
21
22#include "omap_drv.h"
23
24/*
25 * connector funcs
26 */
27
28#define to_omap_connector(x) container_of(x, struct omap_connector, base)
29
30struct omap_connector {
31 struct drm_connector base;
32 struct omap_dss_device *dssdev;
33 bool hdmi_mode;
34};
35
36static void omap_connector_hpd_cb(void *cb_data,
37 enum drm_connector_status status)
38{
39 struct omap_connector *omap_connector = cb_data;
40 struct drm_connector *connector = &omap_connector->base;
41 struct drm_device *dev = connector->dev;
42 enum drm_connector_status old_status;
43
44 mutex_lock(&dev->mode_config.mutex);
45 old_status = connector->status;
46 connector->status = status;
47 mutex_unlock(&dev->mode_config.mutex);
48
49 if (old_status != status)
50 drm_kms_helper_hotplug_event(dev);
51}
52
53bool omap_connector_get_hdmi_mode(struct drm_connector *connector)
54{
55 struct omap_connector *omap_connector = to_omap_connector(connector);
56
57 return omap_connector->hdmi_mode;
58}
59
60static enum drm_connector_status omap_connector_detect(
61 struct drm_connector *connector, bool force)
62{
63 struct omap_connector *omap_connector = to_omap_connector(connector);
64 struct omap_dss_device *dssdev = omap_connector->dssdev;
65 struct omap_dss_driver *dssdrv = dssdev->driver;
66 enum drm_connector_status ret;
67
68 if (dssdrv->detect) {
69 if (dssdrv->detect(dssdev))
70 ret = connector_status_connected;
71 else
72 ret = connector_status_disconnected;
73 } else if (dssdev->type == OMAP_DISPLAY_TYPE_DPI ||
74 dssdev->type == OMAP_DISPLAY_TYPE_DBI ||
75 dssdev->type == OMAP_DISPLAY_TYPE_SDI ||
76 dssdev->type == OMAP_DISPLAY_TYPE_DSI) {
77 ret = connector_status_connected;
78 } else {
79 ret = connector_status_unknown;
80 }
81
82 VERB("%s: %d (force=%d)", omap_connector->dssdev->name, ret, force);
83
84 return ret;
85}
86
87static void omap_connector_destroy(struct drm_connector *connector)
88{
89 struct omap_connector *omap_connector = to_omap_connector(connector);
90 struct omap_dss_device *dssdev = omap_connector->dssdev;
91
92 DBG("%s", omap_connector->dssdev->name);
93 if (connector->polled == DRM_CONNECTOR_POLL_HPD &&
94 dssdev->driver->unregister_hpd_cb) {
95 dssdev->driver->unregister_hpd_cb(dssdev);
96 }
97 drm_connector_unregister(connector);
98 drm_connector_cleanup(connector);
99 kfree(omap_connector);
100
101 omap_dss_put_device(dssdev);
102}
103
104#define MAX_EDID 512
105
106static int omap_connector_get_modes(struct drm_connector *connector)
107{
108 struct omap_connector *omap_connector = to_omap_connector(connector);
109 struct omap_dss_device *dssdev = omap_connector->dssdev;
110 struct omap_dss_driver *dssdrv = dssdev->driver;
111 struct drm_device *dev = connector->dev;
112 int n = 0;
113
114 DBG("%s", omap_connector->dssdev->name);
115
116 /* if display exposes EDID, then we parse that in the normal way to
117 * build table of supported modes.. otherwise (ie. fixed resolution
118 * LCD panels) we just return a single mode corresponding to the
119 * currently configured timings:
120 */
121 if (dssdrv->read_edid) {
122 void *edid = kzalloc(MAX_EDID, GFP_KERNEL);
123
124 if (!edid)
125 return 0;
126
127 if ((dssdrv->read_edid(dssdev, edid, MAX_EDID) > 0) &&
128 drm_edid_is_valid(edid)) {
129 drm_mode_connector_update_edid_property(
130 connector, edid);
131 n = drm_add_edid_modes(connector, edid);
132
133 omap_connector->hdmi_mode =
134 drm_detect_hdmi_monitor(edid);
135 } else {
136 drm_mode_connector_update_edid_property(
137 connector, NULL);
138 }
139
140 kfree(edid);
141 } else {
142 struct drm_display_mode *mode = drm_mode_create(dev);
143 struct videomode vm = {0};
144
145 if (!mode)
146 return 0;
147
148 dssdrv->get_timings(dssdev, &vm);
149
150 drm_display_mode_from_videomode(&vm, mode);
151
152 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
153 drm_mode_set_name(mode);
154 drm_mode_probed_add(connector, mode);
155
156 if (dssdrv->get_size) {
157 dssdrv->get_size(dssdev,
158 &connector->display_info.width_mm,
159 &connector->display_info.height_mm);
160 }
161
162 n = 1;
163 }
164
165 return n;
166}
167
168static int omap_connector_mode_valid(struct drm_connector *connector,
169 struct drm_display_mode *mode)
170{
171 struct omap_connector *omap_connector = to_omap_connector(connector);
172 struct omap_dss_device *dssdev = omap_connector->dssdev;
173 struct omap_dss_driver *dssdrv = dssdev->driver;
174 struct videomode vm = {0};
175 struct drm_device *dev = connector->dev;
176 struct drm_display_mode *new_mode;
177 int r, ret = MODE_BAD;
178
179 drm_display_mode_to_videomode(mode, &vm);
180 mode->vrefresh = drm_mode_vrefresh(mode);
181
182 /*
183 * if the panel driver doesn't have a check_timings, it's most likely
184 * a fixed resolution panel, check if the timings match with the
185 * panel's timings
186 */
187 if (dssdrv->check_timings) {
188 r = dssdrv->check_timings(dssdev, &vm);
189 } else {
190 struct videomode t = {0};
191
192 dssdrv->get_timings(dssdev, &t);
193
194 /*
195 * Ignore the flags, as we don't get them from
196 * drm_display_mode_to_videomode.
197 */
198 t.flags = 0;
199
200 if (memcmp(&vm, &t, sizeof(vm)))
201 r = -EINVAL;
202 else
203 r = 0;
204 }
205
206 if (!r) {
207 /* check if vrefresh is still valid */
208 new_mode = drm_mode_duplicate(dev, mode);
209
210 if (!new_mode)
211 return MODE_BAD;
212
213 new_mode->clock = vm.pixelclock / 1000;
214 new_mode->vrefresh = 0;
215 if (mode->vrefresh == drm_mode_vrefresh(new_mode))
216 ret = MODE_OK;
217 drm_mode_destroy(dev, new_mode);
218 }
219
220 DBG("connector: mode %s: "
221 "%d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x",
222 (ret == MODE_OK) ? "valid" : "invalid",
223 mode->base.id, mode->name, mode->vrefresh, mode->clock,
224 mode->hdisplay, mode->hsync_start,
225 mode->hsync_end, mode->htotal,
226 mode->vdisplay, mode->vsync_start,
227 mode->vsync_end, mode->vtotal, mode->type, mode->flags);
228
229 return ret;
230}
231
232static const struct drm_connector_funcs omap_connector_funcs = {
233 .reset = drm_atomic_helper_connector_reset,
234 .detect = omap_connector_detect,
235 .fill_modes = drm_helper_probe_single_connector_modes,
236 .destroy = omap_connector_destroy,
237 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
238 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
239};
240
241static const struct drm_connector_helper_funcs omap_connector_helper_funcs = {
242 .get_modes = omap_connector_get_modes,
243 .mode_valid = omap_connector_mode_valid,
244};
245
246/* initialize connector */
247struct drm_connector *omap_connector_init(struct drm_device *dev,
248 int connector_type, struct omap_dss_device *dssdev,
249 struct drm_encoder *encoder)
250{
251 struct drm_connector *connector = NULL;
252 struct omap_connector *omap_connector;
253 bool hpd_supported = false;
254
255 DBG("%s", dssdev->name);
256
257 omap_dss_get_device(dssdev);
258
259 omap_connector = kzalloc(sizeof(*omap_connector), GFP_KERNEL);
260 if (!omap_connector)
261 goto fail;
262
263 omap_connector->dssdev = dssdev;
264
265 connector = &omap_connector->base;
266
267 drm_connector_init(dev, connector, &omap_connector_funcs,
268 connector_type);
269 drm_connector_helper_add(connector, &omap_connector_helper_funcs);
270
271 if (dssdev->driver->register_hpd_cb) {
272 int ret = dssdev->driver->register_hpd_cb(dssdev,
273 omap_connector_hpd_cb,
274 omap_connector);
275 if (!ret)
276 hpd_supported = true;
277 else if (ret != -ENOTSUPP)
278 DBG("%s: Failed to register HPD callback (%d).",
279 dssdev->name, ret);
280 }
281
282 if (hpd_supported)
283 connector->polled = DRM_CONNECTOR_POLL_HPD;
284 else if (dssdev->driver->detect)
285 connector->polled = DRM_CONNECTOR_POLL_CONNECT |
286 DRM_CONNECTOR_POLL_DISCONNECT;
287 else
288 connector->polled = 0;
289
290 connector->interlace_allowed = 1;
291 connector->doublescan_allowed = 0;
292
293 return connector;
294
295fail:
296 if (connector)
297 omap_connector_destroy(connector);
298
299 return NULL;
300}