1 /*
2 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
3 * Authors:
4 * Inki Dae <inki.dae@samsung.com>
5 * Joonyoung Shim <jy0922.shim@samsung.com>
6 * Seung-Woo Kim <sw0312.kim@samsung.com>
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice (including the next
16 * paragraph) shall be included in all copies or substantial portions of the
17 * Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
23 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
24 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
25 * OTHER DEALINGS IN THE SOFTWARE.
26 */
27
28 #include "drmP.h"
29 #include "drm_crtc_helper.h"
30
31 #include <drm/exynos_drm.h>
32 #include "exynos_drm_drv.h"
33 #include "exynos_drm_encoder.h"
34
35 #define MAX_EDID 256
36 #define to_exynos_connector(x) container_of(x, struct exynos_drm_connector,\
37 drm_connector)
38
39 struct exynos_drm_connector {
40 struct drm_connector drm_connector;
41 uint32_t encoder_id;
42 struct exynos_drm_manager *manager;
43 };
44
45 /* convert exynos_video_timings to drm_display_mode */
46 static inline void
convert_to_display_mode(struct drm_display_mode * mode,struct exynos_drm_panel_info * panel)47 convert_to_display_mode(struct drm_display_mode *mode,
48 struct exynos_drm_panel_info *panel)
49 {
50 struct fb_videomode *timing = &panel->timing;
51 DRM_DEBUG_KMS("%s\n", __FILE__);
52
53 mode->clock = timing->pixclock / 1000;
54 mode->vrefresh = timing->refresh;
55
56 mode->hdisplay = timing->xres;
57 mode->hsync_start = mode->hdisplay + timing->right_margin;
58 mode->hsync_end = mode->hsync_start + timing->hsync_len;
59 mode->htotal = mode->hsync_end + timing->left_margin;
60
61 mode->vdisplay = timing->yres;
62 mode->vsync_start = mode->vdisplay + timing->lower_margin;
63 mode->vsync_end = mode->vsync_start + timing->vsync_len;
64 mode->vtotal = mode->vsync_end + timing->upper_margin;
65 mode->width_mm = panel->width_mm;
66 mode->height_mm = panel->height_mm;
67
68 if (timing->vmode & FB_VMODE_INTERLACED)
69 mode->flags |= DRM_MODE_FLAG_INTERLACE;
70
71 if (timing->vmode & FB_VMODE_DOUBLE)
72 mode->flags |= DRM_MODE_FLAG_DBLSCAN;
73 }
74
75 /* convert drm_display_mode to exynos_video_timings */
76 static inline void
convert_to_video_timing(struct fb_videomode * timing,struct drm_display_mode * mode)77 convert_to_video_timing(struct fb_videomode *timing,
78 struct drm_display_mode *mode)
79 {
80 DRM_DEBUG_KMS("%s\n", __FILE__);
81
82 memset(timing, 0, sizeof(*timing));
83
84 timing->pixclock = mode->clock * 1000;
85 timing->refresh = drm_mode_vrefresh(mode);
86
87 timing->xres = mode->hdisplay;
88 timing->right_margin = mode->hsync_start - mode->hdisplay;
89 timing->hsync_len = mode->hsync_end - mode->hsync_start;
90 timing->left_margin = mode->htotal - mode->hsync_end;
91
92 timing->yres = mode->vdisplay;
93 timing->lower_margin = mode->vsync_start - mode->vdisplay;
94 timing->vsync_len = mode->vsync_end - mode->vsync_start;
95 timing->upper_margin = mode->vtotal - mode->vsync_end;
96
97 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
98 timing->vmode = FB_VMODE_INTERLACED;
99 else
100 timing->vmode = FB_VMODE_NONINTERLACED;
101
102 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
103 timing->vmode |= FB_VMODE_DOUBLE;
104 }
105
exynos_drm_connector_get_modes(struct drm_connector * connector)106 static int exynos_drm_connector_get_modes(struct drm_connector *connector)
107 {
108 struct exynos_drm_connector *exynos_connector =
109 to_exynos_connector(connector);
110 struct exynos_drm_manager *manager = exynos_connector->manager;
111 struct exynos_drm_display_ops *display_ops = manager->display_ops;
112 unsigned int count;
113
114 DRM_DEBUG_KMS("%s\n", __FILE__);
115
116 if (!display_ops) {
117 DRM_DEBUG_KMS("display_ops is null.\n");
118 return 0;
119 }
120
121 /*
122 * if get_edid() exists then get_edid() callback of hdmi side
123 * is called to get edid data through i2c interface else
124 * get timing from the FIMD driver(display controller).
125 *
126 * P.S. in case of lcd panel, count is always 1 if success
127 * because lcd panel has only one mode.
128 */
129 if (display_ops->get_edid) {
130 int ret;
131 void *edid;
132
133 edid = kzalloc(MAX_EDID, GFP_KERNEL);
134 if (!edid) {
135 DRM_ERROR("failed to allocate edid\n");
136 return 0;
137 }
138
139 ret = display_ops->get_edid(manager->dev, connector,
140 edid, MAX_EDID);
141 if (ret < 0) {
142 DRM_ERROR("failed to get edid data.\n");
143 kfree(edid);
144 edid = NULL;
145 return 0;
146 }
147
148 drm_mode_connector_update_edid_property(connector, edid);
149 count = drm_add_edid_modes(connector, edid);
150
151 kfree(connector->display_info.raw_edid);
152 connector->display_info.raw_edid = edid;
153 } else {
154 struct drm_display_mode *mode = drm_mode_create(connector->dev);
155 struct exynos_drm_panel_info *panel;
156
157 if (display_ops->get_panel)
158 panel = display_ops->get_panel(manager->dev);
159 else {
160 drm_mode_destroy(connector->dev, mode);
161 return 0;
162 }
163
164 convert_to_display_mode(mode, panel);
165 connector->display_info.width_mm = mode->width_mm;
166 connector->display_info.height_mm = mode->height_mm;
167
168 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
169 drm_mode_set_name(mode);
170 drm_mode_probed_add(connector, mode);
171
172 count = 1;
173 }
174
175 return count;
176 }
177
exynos_drm_connector_mode_valid(struct drm_connector * connector,struct drm_display_mode * mode)178 static int exynos_drm_connector_mode_valid(struct drm_connector *connector,
179 struct drm_display_mode *mode)
180 {
181 struct exynos_drm_connector *exynos_connector =
182 to_exynos_connector(connector);
183 struct exynos_drm_manager *manager = exynos_connector->manager;
184 struct exynos_drm_display_ops *display_ops = manager->display_ops;
185 struct fb_videomode timing;
186 int ret = MODE_BAD;
187
188 DRM_DEBUG_KMS("%s\n", __FILE__);
189
190 convert_to_video_timing(&timing, mode);
191
192 if (display_ops && display_ops->check_timing)
193 if (!display_ops->check_timing(manager->dev, (void *)&timing))
194 ret = MODE_OK;
195
196 return ret;
197 }
198
exynos_drm_best_encoder(struct drm_connector * connector)199 struct drm_encoder *exynos_drm_best_encoder(struct drm_connector *connector)
200 {
201 struct drm_device *dev = connector->dev;
202 struct exynos_drm_connector *exynos_connector =
203 to_exynos_connector(connector);
204 struct drm_mode_object *obj;
205 struct drm_encoder *encoder;
206
207 DRM_DEBUG_KMS("%s\n", __FILE__);
208
209 obj = drm_mode_object_find(dev, exynos_connector->encoder_id,
210 DRM_MODE_OBJECT_ENCODER);
211 if (!obj) {
212 DRM_DEBUG_KMS("Unknown ENCODER ID %d\n",
213 exynos_connector->encoder_id);
214 return NULL;
215 }
216
217 encoder = obj_to_encoder(obj);
218
219 return encoder;
220 }
221
222 static struct drm_connector_helper_funcs exynos_connector_helper_funcs = {
223 .get_modes = exynos_drm_connector_get_modes,
224 .mode_valid = exynos_drm_connector_mode_valid,
225 .best_encoder = exynos_drm_best_encoder,
226 };
227
228 /* get detection status of display device. */
229 static enum drm_connector_status
exynos_drm_connector_detect(struct drm_connector * connector,bool force)230 exynos_drm_connector_detect(struct drm_connector *connector, bool force)
231 {
232 struct exynos_drm_connector *exynos_connector =
233 to_exynos_connector(connector);
234 struct exynos_drm_manager *manager = exynos_connector->manager;
235 struct exynos_drm_display_ops *display_ops =
236 manager->display_ops;
237 enum drm_connector_status status = connector_status_disconnected;
238
239 DRM_DEBUG_KMS("%s\n", __FILE__);
240
241 if (display_ops && display_ops->is_connected) {
242 if (display_ops->is_connected(manager->dev))
243 status = connector_status_connected;
244 else
245 status = connector_status_disconnected;
246 }
247
248 return status;
249 }
250
exynos_drm_connector_destroy(struct drm_connector * connector)251 static void exynos_drm_connector_destroy(struct drm_connector *connector)
252 {
253 struct exynos_drm_connector *exynos_connector =
254 to_exynos_connector(connector);
255
256 DRM_DEBUG_KMS("%s\n", __FILE__);
257
258 drm_sysfs_connector_remove(connector);
259 drm_connector_cleanup(connector);
260 kfree(exynos_connector);
261 }
262
263 static struct drm_connector_funcs exynos_connector_funcs = {
264 .dpms = drm_helper_connector_dpms,
265 .fill_modes = drm_helper_probe_single_connector_modes,
266 .detect = exynos_drm_connector_detect,
267 .destroy = exynos_drm_connector_destroy,
268 };
269
exynos_drm_connector_create(struct drm_device * dev,struct drm_encoder * encoder)270 struct drm_connector *exynos_drm_connector_create(struct drm_device *dev,
271 struct drm_encoder *encoder)
272 {
273 struct exynos_drm_connector *exynos_connector;
274 struct exynos_drm_manager *manager = exynos_drm_get_manager(encoder);
275 struct drm_connector *connector;
276 int type;
277 int err;
278
279 DRM_DEBUG_KMS("%s\n", __FILE__);
280
281 exynos_connector = kzalloc(sizeof(*exynos_connector), GFP_KERNEL);
282 if (!exynos_connector) {
283 DRM_ERROR("failed to allocate connector\n");
284 return NULL;
285 }
286
287 connector = &exynos_connector->drm_connector;
288
289 switch (manager->display_ops->type) {
290 case EXYNOS_DISPLAY_TYPE_HDMI:
291 type = DRM_MODE_CONNECTOR_HDMIA;
292 connector->interlace_allowed = true;
293 connector->polled = DRM_CONNECTOR_POLL_HPD;
294 break;
295 default:
296 type = DRM_MODE_CONNECTOR_Unknown;
297 break;
298 }
299
300 drm_connector_init(dev, connector, &exynos_connector_funcs, type);
301 drm_connector_helper_add(connector, &exynos_connector_helper_funcs);
302
303 err = drm_sysfs_connector_add(connector);
304 if (err)
305 goto err_connector;
306
307 exynos_connector->encoder_id = encoder->base.id;
308 exynos_connector->manager = manager;
309 connector->encoder = encoder;
310
311 err = drm_mode_connector_attach_encoder(connector, encoder);
312 if (err) {
313 DRM_ERROR("failed to attach a connector to a encoder\n");
314 goto err_sysfs;
315 }
316
317 DRM_DEBUG_KMS("connector has been created\n");
318
319 return connector;
320
321 err_sysfs:
322 drm_sysfs_connector_remove(connector);
323 err_connector:
324 drm_connector_cleanup(connector);
325 kfree(exynos_connector);
326 return NULL;
327 }
328
329 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
330 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
331 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
332 MODULE_DESCRIPTION("Samsung SoC DRM Connector Driver");
333 MODULE_LICENSE("GPL");
334