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_crtc_helper.h>
32 #include <drm/drm_edid.h>
33 #include <drm/drm_modeset_helper_vtables.h>
34 #include <drm/drm_simple_kms_helper.h>
35 
36 #include "cdv_device.h"
37 #include "psb_drv.h"
38 #include "psb_intel_drv.h"
39 #include "psb_intel_reg.h"
40 
41 /* hdmi control bits */
42 #define HDMI_NULL_PACKETS_DURING_VSYNC	(1 << 9)
43 #define HDMI_BORDER_ENABLE		(1 << 7)
44 #define HDMI_AUDIO_ENABLE		(1 << 6)
45 #define HDMI_VSYNC_ACTIVE_HIGH		(1 << 4)
46 #define HDMI_HSYNC_ACTIVE_HIGH		(1 << 3)
47 /* hdmi-b control bits */
48 #define	HDMIB_PIPE_B_SELECT		(1 << 30)
49 
50 
51 struct mid_intel_hdmi_priv {
52 	u32 hdmi_reg;
53 	u32 save_HDMIB;
54 	bool has_hdmi_sink;
55 	bool has_hdmi_audio;
56 	/* Should set this when detect hotplug */
57 	bool hdmi_device_connected;
58 	struct drm_device *dev;
59 };
60 
cdv_hdmi_mode_set(struct drm_encoder * encoder,struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)61 static void cdv_hdmi_mode_set(struct drm_encoder *encoder,
62 			struct drm_display_mode *mode,
63 			struct drm_display_mode *adjusted_mode)
64 {
65 	struct drm_device *dev = encoder->dev;
66 	struct gma_encoder *gma_encoder = to_gma_encoder(encoder);
67 	struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
68 	u32 hdmib;
69 	struct drm_crtc *crtc = encoder->crtc;
70 	struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
71 
72 	hdmib = (2 << 10);
73 
74 	if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
75 		hdmib |= HDMI_VSYNC_ACTIVE_HIGH;
76 	if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
77 		hdmib |= HDMI_HSYNC_ACTIVE_HIGH;
78 
79 	if (gma_crtc->pipe == 1)
80 		hdmib |= HDMIB_PIPE_B_SELECT;
81 
82 	if (hdmi_priv->has_hdmi_audio) {
83 		hdmib |= HDMI_AUDIO_ENABLE;
84 		hdmib |= HDMI_NULL_PACKETS_DURING_VSYNC;
85 	}
86 
87 	REG_WRITE(hdmi_priv->hdmi_reg, hdmib);
88 	REG_READ(hdmi_priv->hdmi_reg);
89 }
90 
cdv_hdmi_dpms(struct drm_encoder * encoder,int mode)91 static void cdv_hdmi_dpms(struct drm_encoder *encoder, int mode)
92 {
93 	struct drm_device *dev = encoder->dev;
94 	struct gma_encoder *gma_encoder = to_gma_encoder(encoder);
95 	struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
96 	u32 hdmib;
97 
98 	hdmib = REG_READ(hdmi_priv->hdmi_reg);
99 
100 	if (mode != DRM_MODE_DPMS_ON)
101 		REG_WRITE(hdmi_priv->hdmi_reg, hdmib & ~HDMIB_PORT_EN);
102 	else
103 		REG_WRITE(hdmi_priv->hdmi_reg, hdmib | HDMIB_PORT_EN);
104 	REG_READ(hdmi_priv->hdmi_reg);
105 }
106 
cdv_hdmi_save(struct drm_connector * connector)107 static void cdv_hdmi_save(struct drm_connector *connector)
108 {
109 	struct drm_device *dev = connector->dev;
110 	struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
111 	struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
112 
113 	hdmi_priv->save_HDMIB = REG_READ(hdmi_priv->hdmi_reg);
114 }
115 
cdv_hdmi_restore(struct drm_connector * connector)116 static void cdv_hdmi_restore(struct drm_connector *connector)
117 {
118 	struct drm_device *dev = connector->dev;
119 	struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
120 	struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
121 
122 	REG_WRITE(hdmi_priv->hdmi_reg, hdmi_priv->save_HDMIB);
123 	REG_READ(hdmi_priv->hdmi_reg);
124 }
125 
cdv_hdmi_detect(struct drm_connector * connector,bool force)126 static enum drm_connector_status cdv_hdmi_detect(
127 				struct drm_connector *connector, bool force)
128 {
129 	struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
130 	struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
131 	struct edid *edid = NULL;
132 	enum drm_connector_status status = connector_status_disconnected;
133 
134 	edid = drm_get_edid(connector, connector->ddc);
135 
136 	hdmi_priv->has_hdmi_sink = false;
137 	hdmi_priv->has_hdmi_audio = false;
138 	if (edid) {
139 		if (edid->input & DRM_EDID_INPUT_DIGITAL) {
140 			status = connector_status_connected;
141 			hdmi_priv->has_hdmi_sink =
142 						drm_detect_hdmi_monitor(edid);
143 			hdmi_priv->has_hdmi_audio =
144 						drm_detect_monitor_audio(edid);
145 		}
146 		kfree(edid);
147 	}
148 	return status;
149 }
150 
cdv_hdmi_set_property(struct drm_connector * connector,struct drm_property * property,uint64_t value)151 static int cdv_hdmi_set_property(struct drm_connector *connector,
152 				       struct drm_property *property,
153 				       uint64_t value)
154 {
155 	struct drm_encoder *encoder = connector->encoder;
156 
157 	if (!strcmp(property->name, "scaling mode") && encoder) {
158 		struct gma_crtc *crtc = to_gma_crtc(encoder->crtc);
159 		bool centre;
160 		uint64_t curValue;
161 
162 		if (!crtc)
163 			return -1;
164 
165 		switch (value) {
166 		case DRM_MODE_SCALE_FULLSCREEN:
167 			break;
168 		case DRM_MODE_SCALE_NO_SCALE:
169 			break;
170 		case DRM_MODE_SCALE_ASPECT:
171 			break;
172 		default:
173 			return -1;
174 		}
175 
176 		if (drm_object_property_get_value(&connector->base,
177 							property, &curValue))
178 			return -1;
179 
180 		if (curValue == value)
181 			return 0;
182 
183 		if (drm_object_property_set_value(&connector->base,
184 							property, value))
185 			return -1;
186 
187 		centre = (curValue == DRM_MODE_SCALE_NO_SCALE) ||
188 			(value == DRM_MODE_SCALE_NO_SCALE);
189 
190 		if (crtc->saved_mode.hdisplay != 0 &&
191 		    crtc->saved_mode.vdisplay != 0) {
192 			if (centre) {
193 				if (!drm_crtc_helper_set_mode(encoder->crtc, &crtc->saved_mode,
194 					    encoder->crtc->x, encoder->crtc->y, encoder->crtc->primary->fb))
195 					return -1;
196 			} else {
197 				const struct drm_encoder_helper_funcs *helpers
198 						    = encoder->helper_private;
199 				helpers->mode_set(encoder, &crtc->saved_mode,
200 					     &crtc->saved_adjusted_mode);
201 			}
202 		}
203 	}
204 	return 0;
205 }
206 
207 /*
208  * Return the list of HDMI DDC modes if available.
209  */
cdv_hdmi_get_modes(struct drm_connector * connector)210 static int cdv_hdmi_get_modes(struct drm_connector *connector)
211 {
212 	struct edid *edid = NULL;
213 	int ret = 0;
214 
215 	edid = drm_get_edid(connector, connector->ddc);
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 
cdv_hdmi_mode_valid(struct drm_connector * connector,struct drm_display_mode * mode)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 
cdv_hdmi_destroy(struct drm_connector * connector)243 static void cdv_hdmi_destroy(struct drm_connector *connector)
244 {
245 	struct gma_connector *gma_connector = to_gma_connector(connector);
246 	struct gma_i2c_chan *ddc_bus = to_gma_i2c_chan(connector->ddc);
247 
248 	gma_i2c_destroy(ddc_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 
cdv_hdmi_init(struct drm_device * dev,struct psb_intel_mode_device * mode_dev,int reg)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 mid_intel_hdmi_priv *hdmi_priv;
282 	struct gma_i2c_chan *ddc_bus;
283 	int ddc_reg;
284 	int ret;
285 
286 	gma_encoder = kzalloc(sizeof(struct gma_encoder), GFP_KERNEL);
287 	if (!gma_encoder)
288 		return;
289 
290 	gma_connector = kzalloc(sizeof(struct gma_connector), GFP_KERNEL);
291 	if (!gma_connector)
292 		goto err_free_encoder;
293 
294 	hdmi_priv = kzalloc(sizeof(struct mid_intel_hdmi_priv), GFP_KERNEL);
295 	if (!hdmi_priv)
296 		goto err_free_connector;
297 
298 	connector = &gma_connector->base;
299 	connector->polled = DRM_CONNECTOR_POLL_HPD;
300 	gma_connector->save = cdv_hdmi_save;
301 	gma_connector->restore = cdv_hdmi_restore;
302 
303 	switch (reg) {
304 	case SDVOB:
305 		ddc_reg = GPIOE;
306 		gma_encoder->ddi_select = DDI0_SELECT;
307 		break;
308 	case SDVOC:
309 		ddc_reg = GPIOD;
310 		gma_encoder->ddi_select = DDI1_SELECT;
311 		break;
312 	default:
313 		DRM_ERROR("unknown reg 0x%x for HDMI\n", reg);
314 		goto err_free_hdmi_priv;
315 	}
316 
317 	ddc_bus = gma_i2c_create(dev, ddc_reg,
318 				 (reg == SDVOB) ? "HDMIB" : "HDMIC");
319 	if (!ddc_bus) {
320 		dev_err(dev->dev, "No ddc adapter available!\n");
321 		goto err_free_hdmi_priv;
322 	}
323 
324 	ret = drm_connector_init_with_ddc(dev, connector,
325 					  &cdv_hdmi_connector_funcs,
326 					  DRM_MODE_CONNECTOR_DVID,
327 					  &ddc_bus->base);
328 	if (ret)
329 		goto err_ddc_destroy;
330 
331 	ret = drm_simple_encoder_init(dev, &gma_encoder->base,
332 				      DRM_MODE_ENCODER_TMDS);
333 	if (ret)
334 		goto err_connector_cleanup;
335 
336 	gma_connector_attach_encoder(gma_connector, gma_encoder);
337 	gma_encoder->type = INTEL_OUTPUT_HDMI;
338 	hdmi_priv->hdmi_reg = reg;
339 	hdmi_priv->has_hdmi_sink = false;
340 	gma_encoder->dev_priv = hdmi_priv;
341 
342 	drm_encoder_helper_add(&gma_encoder->base, &cdv_hdmi_helper_funcs);
343 	drm_connector_helper_add(connector,
344 				 &cdv_hdmi_connector_helper_funcs);
345 	connector->display_info.subpixel_order = SubPixelHorizontalRGB;
346 	connector->interlace_allowed = false;
347 	connector->doublescan_allowed = false;
348 
349 	drm_object_attach_property(&connector->base,
350 				      dev->mode_config.scaling_mode_property,
351 				      DRM_MODE_SCALE_FULLSCREEN);
352 
353 	hdmi_priv->dev = dev;
354 	return;
355 
356 err_connector_cleanup:
357 	drm_connector_cleanup(connector);
358 err_ddc_destroy:
359 	gma_i2c_destroy(ddc_bus);
360 err_free_hdmi_priv:
361 	kfree(hdmi_priv);
362 err_free_connector:
363 	kfree(gma_connector);
364 err_free_encoder:
365 	kfree(gma_encoder);
366 }
367