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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 <linux/pm_runtime.h>
31
32#include <drm/drm.h>
33#include <drm/drm_crtc.h>
34#include <drm/drm_edid.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 mdfld_hdmi_i2c *i2c_bus;
59 struct i2c_adapter *hdmi_i2c_adapter; /* for control functions */
60 struct drm_device *dev;
61};
62
63static void cdv_hdmi_mode_set(struct drm_encoder *encoder,
64 struct drm_display_mode *mode,
65 struct drm_display_mode *adjusted_mode)
66{
67 struct drm_device *dev = encoder->dev;
68 struct gma_encoder *gma_encoder = to_gma_encoder(encoder);
69 struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
70 u32 hdmib;
71 struct drm_crtc *crtc = encoder->crtc;
72 struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
73
74 hdmib = (2 << 10);
75
76 if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
77 hdmib |= HDMI_VSYNC_ACTIVE_HIGH;
78 if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
79 hdmib |= HDMI_HSYNC_ACTIVE_HIGH;
80
81 if (gma_crtc->pipe == 1)
82 hdmib |= HDMIB_PIPE_B_SELECT;
83
84 if (hdmi_priv->has_hdmi_audio) {
85 hdmib |= HDMI_AUDIO_ENABLE;
86 hdmib |= HDMI_NULL_PACKETS_DURING_VSYNC;
87 }
88
89 REG_WRITE(hdmi_priv->hdmi_reg, hdmib);
90 REG_READ(hdmi_priv->hdmi_reg);
91}
92
93static void cdv_hdmi_dpms(struct drm_encoder *encoder, int mode)
94{
95 struct drm_device *dev = encoder->dev;
96 struct gma_encoder *gma_encoder = to_gma_encoder(encoder);
97 struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
98 u32 hdmib;
99
100 hdmib = REG_READ(hdmi_priv->hdmi_reg);
101
102 if (mode != DRM_MODE_DPMS_ON)
103 REG_WRITE(hdmi_priv->hdmi_reg, hdmib & ~HDMIB_PORT_EN);
104 else
105 REG_WRITE(hdmi_priv->hdmi_reg, hdmib | HDMIB_PORT_EN);
106 REG_READ(hdmi_priv->hdmi_reg);
107}
108
109static void cdv_hdmi_save(struct drm_connector *connector)
110{
111 struct drm_device *dev = connector->dev;
112 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
113 struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
114
115 hdmi_priv->save_HDMIB = REG_READ(hdmi_priv->hdmi_reg);
116}
117
118static void cdv_hdmi_restore(struct drm_connector *connector)
119{
120 struct drm_device *dev = connector->dev;
121 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
122 struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
123
124 REG_WRITE(hdmi_priv->hdmi_reg, hdmi_priv->save_HDMIB);
125 REG_READ(hdmi_priv->hdmi_reg);
126}
127
128static enum drm_connector_status cdv_hdmi_detect(
129 struct drm_connector *connector, bool force)
130{
131 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
132 struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
133 struct edid *edid = NULL;
134 enum drm_connector_status status = connector_status_disconnected;
135
136 edid = drm_get_edid(connector, &gma_encoder->i2c_bus->adapter);
137
138 hdmi_priv->has_hdmi_sink = false;
139 hdmi_priv->has_hdmi_audio = false;
140 if (edid) {
141 if (edid->input & DRM_EDID_INPUT_DIGITAL) {
142 status = connector_status_connected;
143 hdmi_priv->has_hdmi_sink =
144 drm_detect_hdmi_monitor(edid);
145 hdmi_priv->has_hdmi_audio =
146 drm_detect_monitor_audio(edid);
147 }
148 kfree(edid);
149 }
150 return status;
151}
152
153static int cdv_hdmi_set_property(struct drm_connector *connector,
154 struct drm_property *property,
155 uint64_t value)
156{
157 struct drm_encoder *encoder = connector->encoder;
158
159 if (!strcmp(property->name, "scaling mode") && encoder) {
160 struct gma_crtc *crtc = to_gma_crtc(encoder->crtc);
161 bool centre;
162 uint64_t curValue;
163
164 if (!crtc)
165 return -1;
166
167 switch (value) {
168 case DRM_MODE_SCALE_FULLSCREEN:
169 break;
170 case DRM_MODE_SCALE_NO_SCALE:
171 break;
172 case DRM_MODE_SCALE_ASPECT:
173 break;
174 default:
175 return -1;
176 }
177
178 if (drm_object_property_get_value(&connector->base,
179 property, &curValue))
180 return -1;
181
182 if (curValue == value)
183 return 0;
184
185 if (drm_object_property_set_value(&connector->base,
186 property, value))
187 return -1;
188
189 centre = (curValue == DRM_MODE_SCALE_NO_SCALE) ||
190 (value == DRM_MODE_SCALE_NO_SCALE);
191
192 if (crtc->saved_mode.hdisplay != 0 &&
193 crtc->saved_mode.vdisplay != 0) {
194 if (centre) {
195 if (!drm_crtc_helper_set_mode(encoder->crtc, &crtc->saved_mode,
196 encoder->crtc->x, encoder->crtc->y, encoder->crtc->primary->fb))
197 return -1;
198 } else {
199 const struct drm_encoder_helper_funcs *helpers
200 = encoder->helper_private;
201 helpers->mode_set(encoder, &crtc->saved_mode,
202 &crtc->saved_adjusted_mode);
203 }
204 }
205 }
206 return 0;
207}
208
209/*
210 * Return the list of HDMI DDC modes if available.
211 */
212static int cdv_hdmi_get_modes(struct drm_connector *connector)
213{
214 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
215 struct edid *edid = NULL;
216 int ret = 0;
217
218 edid = drm_get_edid(connector, &gma_encoder->i2c_bus->adapter);
219 if (edid) {
220 drm_connector_update_edid_property(connector, edid);
221 ret = drm_add_edid_modes(connector, edid);
222 kfree(edid);
223 }
224 return ret;
225}
226
227static enum drm_mode_status cdv_hdmi_mode_valid(struct drm_connector *connector,
228 struct drm_display_mode *mode)
229{
230 if (mode->clock > 165000)
231 return MODE_CLOCK_HIGH;
232 if (mode->clock < 20000)
233 return MODE_CLOCK_HIGH;
234
235 /* just in case */
236 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
237 return MODE_NO_DBLESCAN;
238
239 /* just in case */
240 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
241 return MODE_NO_INTERLACE;
242
243 return MODE_OK;
244}
245
246static void cdv_hdmi_destroy(struct drm_connector *connector)
247{
248 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
249
250 psb_intel_i2c_destroy(gma_encoder->i2c_bus);
251 drm_connector_unregister(connector);
252 drm_connector_cleanup(connector);
253 kfree(connector);
254}
255
256static const struct drm_encoder_helper_funcs cdv_hdmi_helper_funcs = {
257 .dpms = cdv_hdmi_dpms,
258 .prepare = gma_encoder_prepare,
259 .mode_set = cdv_hdmi_mode_set,
260 .commit = gma_encoder_commit,
261};
262
263static const struct drm_connector_helper_funcs
264 cdv_hdmi_connector_helper_funcs = {
265 .get_modes = cdv_hdmi_get_modes,
266 .mode_valid = cdv_hdmi_mode_valid,
267 .best_encoder = gma_best_encoder,
268};
269
270static const struct drm_connector_funcs cdv_hdmi_connector_funcs = {
271 .dpms = drm_helper_connector_dpms,
272 .detect = cdv_hdmi_detect,
273 .fill_modes = drm_helper_probe_single_connector_modes,
274 .set_property = cdv_hdmi_set_property,
275 .destroy = cdv_hdmi_destroy,
276};
277
278void cdv_hdmi_init(struct drm_device *dev,
279 struct psb_intel_mode_device *mode_dev, int reg)
280{
281 struct gma_encoder *gma_encoder;
282 struct gma_connector *gma_connector;
283 struct drm_connector *connector;
284 struct drm_encoder *encoder;
285 struct mid_intel_hdmi_priv *hdmi_priv;
286 int ddc_bus;
287
288 gma_encoder = kzalloc(sizeof(struct gma_encoder), GFP_KERNEL);
289
290 if (!gma_encoder)
291 return;
292
293 gma_connector = kzalloc(sizeof(struct gma_connector),
294 GFP_KERNEL);
295
296 if (!gma_connector)
297 goto err_connector;
298
299 hdmi_priv = kzalloc(sizeof(struct mid_intel_hdmi_priv), GFP_KERNEL);
300
301 if (!hdmi_priv)
302 goto err_priv;
303
304 connector = &gma_connector->base;
305 connector->polled = DRM_CONNECTOR_POLL_HPD;
306 gma_connector->save = cdv_hdmi_save;
307 gma_connector->restore = cdv_hdmi_restore;
308
309 encoder = &gma_encoder->base;
310 drm_connector_init(dev, connector,
311 &cdv_hdmi_connector_funcs,
312 DRM_MODE_CONNECTOR_DVID);
313
314 drm_encoder_init(dev, encoder, &psb_intel_lvds_enc_funcs,
315 DRM_MODE_ENCODER_TMDS, NULL);
316
317 gma_connector_attach_encoder(gma_connector, gma_encoder);
318 gma_encoder->type = INTEL_OUTPUT_HDMI;
319 hdmi_priv->hdmi_reg = reg;
320 hdmi_priv->has_hdmi_sink = false;
321 gma_encoder->dev_priv = hdmi_priv;
322
323 drm_encoder_helper_add(encoder, &cdv_hdmi_helper_funcs);
324 drm_connector_helper_add(connector,
325 &cdv_hdmi_connector_helper_funcs);
326 connector->display_info.subpixel_order = SubPixelHorizontalRGB;
327 connector->interlace_allowed = false;
328 connector->doublescan_allowed = false;
329
330 drm_object_attach_property(&connector->base,
331 dev->mode_config.scaling_mode_property,
332 DRM_MODE_SCALE_FULLSCREEN);
333
334 switch (reg) {
335 case SDVOB:
336 ddc_bus = GPIOE;
337 gma_encoder->ddi_select = DDI0_SELECT;
338 break;
339 case SDVOC:
340 ddc_bus = GPIOD;
341 gma_encoder->ddi_select = DDI1_SELECT;
342 break;
343 default:
344 DRM_ERROR("unknown reg 0x%x for HDMI\n", reg);
345 goto failed_ddc;
346 break;
347 }
348
349 gma_encoder->i2c_bus = psb_intel_i2c_create(dev,
350 ddc_bus, (reg == SDVOB) ? "HDMIB" : "HDMIC");
351
352 if (!gma_encoder->i2c_bus) {
353 dev_err(dev->dev, "No ddc adapter available!\n");
354 goto failed_ddc;
355 }
356
357 hdmi_priv->hdmi_i2c_adapter = &(gma_encoder->i2c_bus->adapter);
358 hdmi_priv->dev = dev;
359 drm_connector_register(connector);
360 return;
361
362failed_ddc:
363 drm_encoder_cleanup(encoder);
364 drm_connector_cleanup(connector);
365err_priv:
366 kfree(gma_connector);
367err_connector:
368 kfree(gma_encoder);
369}