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 
27 #include <linux/pm_runtime.h>
28 
29 #include <drm/drm.h>
30 #include <drm/drm_crtc.h>
31 #include <drm/drm_edid.h>
32 #include <drm/drm_simple_kms_helper.h>
33 
34 #include "cdv_device.h"
35 #include "psb_drv.h"
36 #include "psb_intel_drv.h"
37 #include "psb_intel_reg.h"
38 
39 /* hdmi control bits */
40 #define HDMI_NULL_PACKETS_DURING_VSYNC	(1 << 9)
41 #define HDMI_BORDER_ENABLE		(1 << 7)
42 #define HDMI_AUDIO_ENABLE		(1 << 6)
43 #define HDMI_VSYNC_ACTIVE_HIGH		(1 << 4)
44 #define HDMI_HSYNC_ACTIVE_HIGH		(1 << 3)
45 /* hdmi-b control bits */
46 #define	HDMIB_PIPE_B_SELECT		(1 << 30)
47 
48 
49 struct mid_intel_hdmi_priv {
50 	u32 hdmi_reg;
51 	u32 save_HDMIB;
52 	bool has_hdmi_sink;
53 	bool has_hdmi_audio;
54 	/* Should set this when detect hotplug */
55 	bool hdmi_device_connected;
56 	struct i2c_adapter *hdmi_i2c_adapter;	/* for control functions */
57 	struct drm_device *dev;
58 };
59 
60 static void cdv_hdmi_mode_set(struct drm_encoder *encoder,
61 			struct drm_display_mode *mode,
62 			struct drm_display_mode *adjusted_mode)
63 {
64 	struct drm_device *dev = encoder->dev;
65 	struct gma_encoder *gma_encoder = to_gma_encoder(encoder);
66 	struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
67 	u32 hdmib;
68 	struct drm_crtc *crtc = encoder->crtc;
69 	struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
70 
71 	hdmib = (2 << 10);
72 
73 	if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
74 		hdmib |= HDMI_VSYNC_ACTIVE_HIGH;
75 	if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
76 		hdmib |= HDMI_HSYNC_ACTIVE_HIGH;
77 
78 	if (gma_crtc->pipe == 1)
79 		hdmib |= HDMIB_PIPE_B_SELECT;
80 
81 	if (hdmi_priv->has_hdmi_audio) {
82 		hdmib |= HDMI_AUDIO_ENABLE;
83 		hdmib |= HDMI_NULL_PACKETS_DURING_VSYNC;
84 	}
85 
86 	REG_WRITE(hdmi_priv->hdmi_reg, hdmib);
87 	REG_READ(hdmi_priv->hdmi_reg);
88 }
89 
90 static void cdv_hdmi_dpms(struct drm_encoder *encoder, int mode)
91 {
92 	struct drm_device *dev = encoder->dev;
93 	struct gma_encoder *gma_encoder = to_gma_encoder(encoder);
94 	struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
95 	u32 hdmib;
96 
97 	hdmib = REG_READ(hdmi_priv->hdmi_reg);
98 
99 	if (mode != DRM_MODE_DPMS_ON)
100 		REG_WRITE(hdmi_priv->hdmi_reg, hdmib & ~HDMIB_PORT_EN);
101 	else
102 		REG_WRITE(hdmi_priv->hdmi_reg, hdmib | HDMIB_PORT_EN);
103 	REG_READ(hdmi_priv->hdmi_reg);
104 }
105 
106 static void cdv_hdmi_save(struct drm_connector *connector)
107 {
108 	struct drm_device *dev = connector->dev;
109 	struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
110 	struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
111 
112 	hdmi_priv->save_HDMIB = REG_READ(hdmi_priv->hdmi_reg);
113 }
114 
115 static void cdv_hdmi_restore(struct drm_connector *connector)
116 {
117 	struct drm_device *dev = connector->dev;
118 	struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
119 	struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
120 
121 	REG_WRITE(hdmi_priv->hdmi_reg, hdmi_priv->save_HDMIB);
122 	REG_READ(hdmi_priv->hdmi_reg);
123 }
124 
125 static enum drm_connector_status cdv_hdmi_detect(
126 				struct drm_connector *connector, bool force)
127 {
128 	struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
129 	struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
130 	struct edid *edid = NULL;
131 	enum drm_connector_status status = connector_status_disconnected;
132 
133 	edid = drm_get_edid(connector, &gma_encoder->i2c_bus->adapter);
134 
135 	hdmi_priv->has_hdmi_sink = false;
136 	hdmi_priv->has_hdmi_audio = false;
137 	if (edid) {
138 		if (edid->input & DRM_EDID_INPUT_DIGITAL) {
139 			status = connector_status_connected;
140 			hdmi_priv->has_hdmi_sink =
141 						drm_detect_hdmi_monitor(edid);
142 			hdmi_priv->has_hdmi_audio =
143 						drm_detect_monitor_audio(edid);
144 		}
145 		kfree(edid);
146 	}
147 	return status;
148 }
149 
150 static int cdv_hdmi_set_property(struct drm_connector *connector,
151 				       struct drm_property *property,
152 				       uint64_t value)
153 {
154 	struct drm_encoder *encoder = connector->encoder;
155 
156 	if (!strcmp(property->name, "scaling mode") && encoder) {
157 		struct gma_crtc *crtc = to_gma_crtc(encoder->crtc);
158 		bool centre;
159 		uint64_t curValue;
160 
161 		if (!crtc)
162 			return -1;
163 
164 		switch (value) {
165 		case DRM_MODE_SCALE_FULLSCREEN:
166 			break;
167 		case DRM_MODE_SCALE_NO_SCALE:
168 			break;
169 		case DRM_MODE_SCALE_ASPECT:
170 			break;
171 		default:
172 			return -1;
173 		}
174 
175 		if (drm_object_property_get_value(&connector->base,
176 							property, &curValue))
177 			return -1;
178 
179 		if (curValue == value)
180 			return 0;
181 
182 		if (drm_object_property_set_value(&connector->base,
183 							property, value))
184 			return -1;
185 
186 		centre = (curValue == DRM_MODE_SCALE_NO_SCALE) ||
187 			(value == DRM_MODE_SCALE_NO_SCALE);
188 
189 		if (crtc->saved_mode.hdisplay != 0 &&
190 		    crtc->saved_mode.vdisplay != 0) {
191 			if (centre) {
192 				if (!drm_crtc_helper_set_mode(encoder->crtc, &crtc->saved_mode,
193 					    encoder->crtc->x, encoder->crtc->y, encoder->crtc->primary->fb))
194 					return -1;
195 			} else {
196 				const struct drm_encoder_helper_funcs *helpers
197 						    = encoder->helper_private;
198 				helpers->mode_set(encoder, &crtc->saved_mode,
199 					     &crtc->saved_adjusted_mode);
200 			}
201 		}
202 	}
203 	return 0;
204 }
205 
206 /*
207  * Return the list of HDMI DDC modes if available.
208  */
209 static int cdv_hdmi_get_modes(struct drm_connector *connector)
210 {
211 	struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
212 	struct edid *edid = NULL;
213 	int ret = 0;
214 
215 	edid = drm_get_edid(connector, &gma_encoder->i2c_bus->adapter);
216 	if (edid) {
217 		drm_connector_update_edid_property(connector, edid);
218 		ret = drm_add_edid_modes(connector, edid);
219 		kfree(edid);
220 	}
221 	return ret;
222 }
223 
224 static enum drm_mode_status cdv_hdmi_mode_valid(struct drm_connector *connector,
225 				 struct drm_display_mode *mode)
226 {
227 	if (mode->clock > 165000)
228 		return MODE_CLOCK_HIGH;
229 	if (mode->clock < 20000)
230 		return MODE_CLOCK_HIGH;
231 
232 	/* just in case */
233 	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
234 		return MODE_NO_DBLESCAN;
235 
236 	/* just in case */
237 	if (mode->flags & DRM_MODE_FLAG_INTERLACE)
238 		return MODE_NO_INTERLACE;
239 
240 	return MODE_OK;
241 }
242 
243 static void cdv_hdmi_destroy(struct drm_connector *connector)
244 {
245 	struct gma_connector *gma_connector = to_gma_connector(connector);
246 	struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
247 
248 	psb_intel_i2c_destroy(gma_encoder->i2c_bus);
249 	drm_connector_cleanup(connector);
250 	kfree(gma_connector);
251 }
252 
253 static const struct drm_encoder_helper_funcs cdv_hdmi_helper_funcs = {
254 	.dpms = cdv_hdmi_dpms,
255 	.prepare = gma_encoder_prepare,
256 	.mode_set = cdv_hdmi_mode_set,
257 	.commit = gma_encoder_commit,
258 };
259 
260 static const struct drm_connector_helper_funcs
261 					cdv_hdmi_connector_helper_funcs = {
262 	.get_modes = cdv_hdmi_get_modes,
263 	.mode_valid = cdv_hdmi_mode_valid,
264 	.best_encoder = gma_best_encoder,
265 };
266 
267 static const struct drm_connector_funcs cdv_hdmi_connector_funcs = {
268 	.dpms = drm_helper_connector_dpms,
269 	.detect = cdv_hdmi_detect,
270 	.fill_modes = drm_helper_probe_single_connector_modes,
271 	.set_property = cdv_hdmi_set_property,
272 	.destroy = cdv_hdmi_destroy,
273 };
274 
275 void cdv_hdmi_init(struct drm_device *dev,
276 			struct psb_intel_mode_device *mode_dev, int reg)
277 {
278 	struct gma_encoder *gma_encoder;
279 	struct gma_connector *gma_connector;
280 	struct drm_connector *connector;
281 	struct drm_encoder *encoder;
282 	struct mid_intel_hdmi_priv *hdmi_priv;
283 	int ddc_bus;
284 
285 	gma_encoder = kzalloc(sizeof(struct gma_encoder), GFP_KERNEL);
286 
287 	if (!gma_encoder)
288 		return;
289 
290 	gma_connector = kzalloc(sizeof(struct gma_connector),
291 				      GFP_KERNEL);
292 
293 	if (!gma_connector)
294 		goto err_connector;
295 
296 	hdmi_priv = kzalloc(sizeof(struct mid_intel_hdmi_priv), GFP_KERNEL);
297 
298 	if (!hdmi_priv)
299 		goto err_priv;
300 
301 	connector = &gma_connector->base;
302 	connector->polled = DRM_CONNECTOR_POLL_HPD;
303 	gma_connector->save = cdv_hdmi_save;
304 	gma_connector->restore = cdv_hdmi_restore;
305 
306 	encoder = &gma_encoder->base;
307 	drm_connector_init(dev, connector,
308 			   &cdv_hdmi_connector_funcs,
309 			   DRM_MODE_CONNECTOR_DVID);
310 
311 	drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_TMDS);
312 
313 	gma_connector_attach_encoder(gma_connector, gma_encoder);
314 	gma_encoder->type = INTEL_OUTPUT_HDMI;
315 	hdmi_priv->hdmi_reg = reg;
316 	hdmi_priv->has_hdmi_sink = false;
317 	gma_encoder->dev_priv = hdmi_priv;
318 
319 	drm_encoder_helper_add(encoder, &cdv_hdmi_helper_funcs);
320 	drm_connector_helper_add(connector,
321 				 &cdv_hdmi_connector_helper_funcs);
322 	connector->display_info.subpixel_order = SubPixelHorizontalRGB;
323 	connector->interlace_allowed = false;
324 	connector->doublescan_allowed = false;
325 
326 	drm_object_attach_property(&connector->base,
327 				      dev->mode_config.scaling_mode_property,
328 				      DRM_MODE_SCALE_FULLSCREEN);
329 
330 	switch (reg) {
331 	case SDVOB:
332 		ddc_bus = GPIOE;
333 		gma_encoder->ddi_select = DDI0_SELECT;
334 		break;
335 	case SDVOC:
336 		ddc_bus = GPIOD;
337 		gma_encoder->ddi_select = DDI1_SELECT;
338 		break;
339 	default:
340 		DRM_ERROR("unknown reg 0x%x for HDMI\n", reg);
341 		goto failed_ddc;
342 		break;
343 	}
344 
345 	gma_encoder->i2c_bus = psb_intel_i2c_create(dev,
346 				ddc_bus, (reg == SDVOB) ? "HDMIB" : "HDMIC");
347 
348 	if (!gma_encoder->i2c_bus) {
349 		dev_err(dev->dev, "No ddc adapter available!\n");
350 		goto failed_ddc;
351 	}
352 
353 	hdmi_priv->hdmi_i2c_adapter = &(gma_encoder->i2c_bus->adapter);
354 	hdmi_priv->dev = dev;
355 	return;
356 
357 failed_ddc:
358 	drm_encoder_cleanup(encoder);
359 	drm_connector_cleanup(connector);
360 err_priv:
361 	kfree(gma_connector);
362 err_connector:
363 	kfree(gma_encoder);
364 }
365