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
51struct 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
61static 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
91static 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
107static 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
116static 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
126static 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
151static 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 */
210static 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
224static 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
243static 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
253static 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
260static 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
267static 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
275void 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
356err_connector_cleanup:
357	drm_connector_cleanup(connector);
358err_ddc_destroy:
359	gma_i2c_destroy(ddc_bus);
360err_free_hdmi_priv:
361	kfree(hdmi_priv);
362err_free_connector:
363	kfree(gma_connector);
364err_free_encoder:
365	kfree(gma_encoder);
366}
367