• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 /*
2  * Copyright © 2006-2011 Intel Corporation
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice (including the next
12  * paragraph) shall be included in all copies or substantial portions of the
13  * Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21  * DEALINGS IN THE SOFTWARE.
22  *
23  * Authors:
24  *	jim liu <jim.liu@intel.com>
25  *
26  * FIXME:
27  *	We should probably make this generic and share it with Medfield
28  */
29 
30 #include <drm/drmP.h>
31 #include <drm/drm.h>
32 #include <drm/drm_crtc.h>
33 #include <drm/drm_edid.h>
34 #include "psb_intel_drv.h"
35 #include "psb_drv.h"
36 #include "psb_intel_reg.h"
37 #include "cdv_device.h"
38 #include <linux/pm_runtime.h>
39 
40 /* hdmi control bits */
41 #define HDMI_NULL_PACKETS_DURING_VSYNC	(1 << 9)
42 #define HDMI_BORDER_ENABLE		(1 << 7)
43 #define HDMI_AUDIO_ENABLE		(1 << 6)
44 #define HDMI_VSYNC_ACTIVE_HIGH		(1 << 4)
45 #define HDMI_HSYNC_ACTIVE_HIGH		(1 << 3)
46 /* hdmi-b control bits */
47 #define	HDMIB_PIPE_B_SELECT		(1 << 30)
48 
49 
50 struct mid_intel_hdmi_priv {
51 	u32 hdmi_reg;
52 	u32 save_HDMIB;
53 	bool has_hdmi_sink;
54 	bool has_hdmi_audio;
55 	/* Should set this when detect hotplug */
56 	bool hdmi_device_connected;
57 	struct mdfld_hdmi_i2c *i2c_bus;
58 	struct i2c_adapter *hdmi_i2c_adapter;	/* for control functions */
59 	struct drm_device *dev;
60 };
61 
cdv_hdmi_mode_set(struct drm_encoder * encoder,struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)62 static void cdv_hdmi_mode_set(struct drm_encoder *encoder,
63 			struct drm_display_mode *mode,
64 			struct drm_display_mode *adjusted_mode)
65 {
66 	struct drm_device *dev = encoder->dev;
67 	struct psb_intel_encoder *psb_intel_encoder = to_psb_intel_encoder(encoder);
68 	struct mid_intel_hdmi_priv *hdmi_priv = psb_intel_encoder->dev_priv;
69 	u32 hdmib;
70 	struct drm_crtc *crtc = encoder->crtc;
71 	struct psb_intel_crtc *intel_crtc = to_psb_intel_crtc(crtc);
72 
73 	hdmib = (2 << 10);
74 
75 	if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
76 		hdmib |= HDMI_VSYNC_ACTIVE_HIGH;
77 	if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
78 		hdmib |= HDMI_HSYNC_ACTIVE_HIGH;
79 
80 	if (intel_crtc->pipe == 1)
81 		hdmib |= HDMIB_PIPE_B_SELECT;
82 
83 	if (hdmi_priv->has_hdmi_audio) {
84 		hdmib |= HDMI_AUDIO_ENABLE;
85 		hdmib |= HDMI_NULL_PACKETS_DURING_VSYNC;
86 	}
87 
88 	REG_WRITE(hdmi_priv->hdmi_reg, hdmib);
89 	REG_READ(hdmi_priv->hdmi_reg);
90 }
91 
cdv_hdmi_mode_fixup(struct drm_encoder * encoder,const struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)92 static bool cdv_hdmi_mode_fixup(struct drm_encoder *encoder,
93 				  const struct drm_display_mode *mode,
94 				  struct drm_display_mode *adjusted_mode)
95 {
96 	return true;
97 }
98 
cdv_hdmi_dpms(struct drm_encoder * encoder,int mode)99 static void cdv_hdmi_dpms(struct drm_encoder *encoder, int mode)
100 {
101 	struct drm_device *dev = encoder->dev;
102 	struct psb_intel_encoder *psb_intel_encoder =
103 						to_psb_intel_encoder(encoder);
104 	struct mid_intel_hdmi_priv *hdmi_priv = psb_intel_encoder->dev_priv;
105 	u32 hdmib;
106 
107 	hdmib = REG_READ(hdmi_priv->hdmi_reg);
108 
109 	if (mode != DRM_MODE_DPMS_ON)
110 		REG_WRITE(hdmi_priv->hdmi_reg, hdmib & ~HDMIB_PORT_EN);
111 	else
112 		REG_WRITE(hdmi_priv->hdmi_reg, hdmib | HDMIB_PORT_EN);
113 	REG_READ(hdmi_priv->hdmi_reg);
114 }
115 
cdv_hdmi_save(struct drm_connector * connector)116 static void cdv_hdmi_save(struct drm_connector *connector)
117 {
118 	struct drm_device *dev = connector->dev;
119 	struct psb_intel_encoder *psb_intel_encoder =
120 					psb_intel_attached_encoder(connector);
121 	struct mid_intel_hdmi_priv *hdmi_priv = psb_intel_encoder->dev_priv;
122 
123 	hdmi_priv->save_HDMIB = REG_READ(hdmi_priv->hdmi_reg);
124 }
125 
cdv_hdmi_restore(struct drm_connector * connector)126 static void cdv_hdmi_restore(struct drm_connector *connector)
127 {
128 	struct drm_device *dev = connector->dev;
129 	struct psb_intel_encoder *psb_intel_encoder =
130 					psb_intel_attached_encoder(connector);
131 	struct mid_intel_hdmi_priv *hdmi_priv = psb_intel_encoder->dev_priv;
132 
133 	REG_WRITE(hdmi_priv->hdmi_reg, hdmi_priv->save_HDMIB);
134 	REG_READ(hdmi_priv->hdmi_reg);
135 }
136 
cdv_hdmi_detect(struct drm_connector * connector,bool force)137 static enum drm_connector_status cdv_hdmi_detect(
138 				struct drm_connector *connector, bool force)
139 {
140 	struct psb_intel_encoder *psb_intel_encoder =
141 					psb_intel_attached_encoder(connector);
142 	struct mid_intel_hdmi_priv *hdmi_priv = psb_intel_encoder->dev_priv;
143 	struct edid *edid = NULL;
144 	enum drm_connector_status status = connector_status_disconnected;
145 
146 	edid = drm_get_edid(connector, &psb_intel_encoder->i2c_bus->adapter);
147 
148 	hdmi_priv->has_hdmi_sink = false;
149 	hdmi_priv->has_hdmi_audio = false;
150 	if (edid) {
151 		if (edid->input & DRM_EDID_INPUT_DIGITAL) {
152 			status = connector_status_connected;
153 			hdmi_priv->has_hdmi_sink =
154 						drm_detect_hdmi_monitor(edid);
155 			hdmi_priv->has_hdmi_audio =
156 						drm_detect_monitor_audio(edid);
157 		}
158 		kfree(edid);
159 	}
160 	return status;
161 }
162 
cdv_hdmi_set_property(struct drm_connector * connector,struct drm_property * property,uint64_t value)163 static int cdv_hdmi_set_property(struct drm_connector *connector,
164 				       struct drm_property *property,
165 				       uint64_t value)
166 {
167 	struct drm_encoder *encoder = connector->encoder;
168 
169 	if (!strcmp(property->name, "scaling mode") && encoder) {
170 		struct psb_intel_crtc *crtc = to_psb_intel_crtc(encoder->crtc);
171 		bool centre;
172 		uint64_t curValue;
173 
174 		if (!crtc)
175 			return -1;
176 
177 		switch (value) {
178 		case DRM_MODE_SCALE_FULLSCREEN:
179 			break;
180 		case DRM_MODE_SCALE_NO_SCALE:
181 			break;
182 		case DRM_MODE_SCALE_ASPECT:
183 			break;
184 		default:
185 			return -1;
186 		}
187 
188 		if (drm_object_property_get_value(&connector->base,
189 							property, &curValue))
190 			return -1;
191 
192 		if (curValue == value)
193 			return 0;
194 
195 		if (drm_object_property_set_value(&connector->base,
196 							property, value))
197 			return -1;
198 
199 		centre = (curValue == DRM_MODE_SCALE_NO_SCALE) ||
200 			(value == DRM_MODE_SCALE_NO_SCALE);
201 
202 		if (crtc->saved_mode.hdisplay != 0 &&
203 		    crtc->saved_mode.vdisplay != 0) {
204 			if (centre) {
205 				if (!drm_crtc_helper_set_mode(encoder->crtc, &crtc->saved_mode,
206 					    encoder->crtc->x, encoder->crtc->y, encoder->crtc->fb))
207 					return -1;
208 			} else {
209 				struct drm_encoder_helper_funcs *helpers
210 						    = encoder->helper_private;
211 				helpers->mode_set(encoder, &crtc->saved_mode,
212 					     &crtc->saved_adjusted_mode);
213 			}
214 		}
215 	}
216 	return 0;
217 }
218 
219 /*
220  * Return the list of HDMI DDC modes if available.
221  */
cdv_hdmi_get_modes(struct drm_connector * connector)222 static int cdv_hdmi_get_modes(struct drm_connector *connector)
223 {
224 	struct psb_intel_encoder *psb_intel_encoder =
225 					psb_intel_attached_encoder(connector);
226 	struct edid *edid = NULL;
227 	int ret = 0;
228 
229 	edid = drm_get_edid(connector, &psb_intel_encoder->i2c_bus->adapter);
230 	if (edid) {
231 		drm_mode_connector_update_edid_property(connector, edid);
232 		ret = drm_add_edid_modes(connector, edid);
233 		kfree(edid);
234 	}
235 	return ret;
236 }
237 
cdv_hdmi_mode_valid(struct drm_connector * connector,struct drm_display_mode * mode)238 static int cdv_hdmi_mode_valid(struct drm_connector *connector,
239 				 struct drm_display_mode *mode)
240 {
241 	if (mode->clock > 165000)
242 		return MODE_CLOCK_HIGH;
243 	if (mode->clock < 20000)
244 		return MODE_CLOCK_HIGH;
245 
246 	/* just in case */
247 	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
248 		return MODE_NO_DBLESCAN;
249 
250 	/* just in case */
251 	if (mode->flags & DRM_MODE_FLAG_INTERLACE)
252 		return MODE_NO_INTERLACE;
253 
254 	return MODE_OK;
255 }
256 
cdv_hdmi_destroy(struct drm_connector * connector)257 static void cdv_hdmi_destroy(struct drm_connector *connector)
258 {
259 	struct psb_intel_encoder *psb_intel_encoder =
260 					psb_intel_attached_encoder(connector);
261 
262 	if (psb_intel_encoder->i2c_bus)
263 		psb_intel_i2c_destroy(psb_intel_encoder->i2c_bus);
264 	drm_sysfs_connector_remove(connector);
265 	drm_connector_cleanup(connector);
266 	kfree(connector);
267 }
268 
269 static const struct drm_encoder_helper_funcs cdv_hdmi_helper_funcs = {
270 	.dpms = cdv_hdmi_dpms,
271 	.mode_fixup = cdv_hdmi_mode_fixup,
272 	.prepare = psb_intel_encoder_prepare,
273 	.mode_set = cdv_hdmi_mode_set,
274 	.commit = psb_intel_encoder_commit,
275 };
276 
277 static const struct drm_connector_helper_funcs
278 					cdv_hdmi_connector_helper_funcs = {
279 	.get_modes = cdv_hdmi_get_modes,
280 	.mode_valid = cdv_hdmi_mode_valid,
281 	.best_encoder = psb_intel_best_encoder,
282 };
283 
284 static const struct drm_connector_funcs cdv_hdmi_connector_funcs = {
285 	.dpms = drm_helper_connector_dpms,
286 	.save = cdv_hdmi_save,
287 	.restore = cdv_hdmi_restore,
288 	.detect = cdv_hdmi_detect,
289 	.fill_modes = drm_helper_probe_single_connector_modes,
290 	.set_property = cdv_hdmi_set_property,
291 	.destroy = cdv_hdmi_destroy,
292 };
293 
cdv_hdmi_init(struct drm_device * dev,struct psb_intel_mode_device * mode_dev,int reg)294 void cdv_hdmi_init(struct drm_device *dev,
295 			struct psb_intel_mode_device *mode_dev, int reg)
296 {
297 	struct psb_intel_encoder *psb_intel_encoder;
298 	struct psb_intel_connector *psb_intel_connector;
299 	struct drm_connector *connector;
300 	struct drm_encoder *encoder;
301 	struct mid_intel_hdmi_priv *hdmi_priv;
302 	int ddc_bus;
303 
304 	psb_intel_encoder = kzalloc(sizeof(struct psb_intel_encoder),
305 				    GFP_KERNEL);
306 
307 	if (!psb_intel_encoder)
308 		return;
309 
310 	psb_intel_connector = kzalloc(sizeof(struct psb_intel_connector),
311 				      GFP_KERNEL);
312 
313 	if (!psb_intel_connector)
314 		goto err_connector;
315 
316 	hdmi_priv = kzalloc(sizeof(struct mid_intel_hdmi_priv), GFP_KERNEL);
317 
318 	if (!hdmi_priv)
319 		goto err_priv;
320 
321 	connector = &psb_intel_connector->base;
322 	connector->polled = DRM_CONNECTOR_POLL_HPD;
323 	encoder = &psb_intel_encoder->base;
324 	drm_connector_init(dev, connector,
325 			   &cdv_hdmi_connector_funcs,
326 			   DRM_MODE_CONNECTOR_DVID);
327 
328 	drm_encoder_init(dev, encoder, &psb_intel_lvds_enc_funcs,
329 			 DRM_MODE_ENCODER_TMDS);
330 
331 	psb_intel_connector_attach_encoder(psb_intel_connector,
332 					   psb_intel_encoder);
333 	psb_intel_encoder->type = INTEL_OUTPUT_HDMI;
334 	hdmi_priv->hdmi_reg = reg;
335 	hdmi_priv->has_hdmi_sink = false;
336 	psb_intel_encoder->dev_priv = hdmi_priv;
337 
338 	drm_encoder_helper_add(encoder, &cdv_hdmi_helper_funcs);
339 	drm_connector_helper_add(connector,
340 				 &cdv_hdmi_connector_helper_funcs);
341 	connector->display_info.subpixel_order = SubPixelHorizontalRGB;
342 	connector->interlace_allowed = false;
343 	connector->doublescan_allowed = false;
344 
345 	drm_object_attach_property(&connector->base,
346 				      dev->mode_config.scaling_mode_property,
347 				      DRM_MODE_SCALE_FULLSCREEN);
348 
349 	switch (reg) {
350 	case SDVOB:
351 		ddc_bus = GPIOE;
352 		psb_intel_encoder->ddi_select = DDI0_SELECT;
353 		break;
354 	case SDVOC:
355 		ddc_bus = GPIOD;
356 		psb_intel_encoder->ddi_select = DDI1_SELECT;
357 		break;
358 	default:
359 		DRM_ERROR("unknown reg 0x%x for HDMI\n", reg);
360 		goto failed_ddc;
361 		break;
362 	}
363 
364 	psb_intel_encoder->i2c_bus = psb_intel_i2c_create(dev,
365 				ddc_bus, (reg == SDVOB) ? "HDMIB" : "HDMIC");
366 
367 	if (!psb_intel_encoder->i2c_bus) {
368 		dev_err(dev->dev, "No ddc adapter available!\n");
369 		goto failed_ddc;
370 	}
371 
372 	hdmi_priv->hdmi_i2c_adapter =
373 				&(psb_intel_encoder->i2c_bus->adapter);
374 	hdmi_priv->dev = dev;
375 	drm_sysfs_connector_add(connector);
376 	return;
377 
378 failed_ddc:
379 	drm_encoder_cleanup(encoder);
380 	drm_connector_cleanup(connector);
381 err_priv:
382 	kfree(psb_intel_connector);
383 err_connector:
384 	kfree(psb_intel_encoder);
385 }
386