1 /*
2 * Copyright © 2006-2007 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 * Eric Anholt <eric@anholt.net>
25 */
26
27 #include <linux/i2c.h>
28 #include <drm/drmP.h>
29
30 #include "intel_bios.h"
31 #include "psb_drv.h"
32 #include "psb_intel_drv.h"
33 #include "psb_intel_reg.h"
34 #include "power.h"
35 #include "cdv_device.h"
36 #include <linux/pm_runtime.h>
37
38
cdv_intel_crt_dpms(struct drm_encoder * encoder,int mode)39 static void cdv_intel_crt_dpms(struct drm_encoder *encoder, int mode)
40 {
41 struct drm_device *dev = encoder->dev;
42 u32 temp, reg;
43 reg = ADPA;
44
45 temp = REG_READ(reg);
46 temp &= ~(ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE);
47 temp &= ~ADPA_DAC_ENABLE;
48
49 switch (mode) {
50 case DRM_MODE_DPMS_ON:
51 temp |= ADPA_DAC_ENABLE;
52 break;
53 case DRM_MODE_DPMS_STANDBY:
54 temp |= ADPA_DAC_ENABLE | ADPA_HSYNC_CNTL_DISABLE;
55 break;
56 case DRM_MODE_DPMS_SUSPEND:
57 temp |= ADPA_DAC_ENABLE | ADPA_VSYNC_CNTL_DISABLE;
58 break;
59 case DRM_MODE_DPMS_OFF:
60 temp |= ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE;
61 break;
62 }
63
64 REG_WRITE(reg, temp);
65 }
66
cdv_intel_crt_mode_valid(struct drm_connector * connector,struct drm_display_mode * mode)67 static int cdv_intel_crt_mode_valid(struct drm_connector *connector,
68 struct drm_display_mode *mode)
69 {
70 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
71 return MODE_NO_DBLESCAN;
72
73 /* The lowest clock for CDV is 20000KHz */
74 if (mode->clock < 20000)
75 return MODE_CLOCK_LOW;
76
77 /* The max clock for CDV is 355 instead of 400 */
78 if (mode->clock > 355000)
79 return MODE_CLOCK_HIGH;
80
81 return MODE_OK;
82 }
83
cdv_intel_crt_mode_set(struct drm_encoder * encoder,struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)84 static void cdv_intel_crt_mode_set(struct drm_encoder *encoder,
85 struct drm_display_mode *mode,
86 struct drm_display_mode *adjusted_mode)
87 {
88
89 struct drm_device *dev = encoder->dev;
90 struct drm_crtc *crtc = encoder->crtc;
91 struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
92 int dpll_md_reg;
93 u32 adpa, dpll_md;
94 u32 adpa_reg;
95
96 if (gma_crtc->pipe == 0)
97 dpll_md_reg = DPLL_A_MD;
98 else
99 dpll_md_reg = DPLL_B_MD;
100
101 adpa_reg = ADPA;
102
103 /*
104 * Disable separate mode multiplier used when cloning SDVO to CRT
105 * XXX this needs to be adjusted when we really are cloning
106 */
107 {
108 dpll_md = REG_READ(dpll_md_reg);
109 REG_WRITE(dpll_md_reg,
110 dpll_md & ~DPLL_MD_UDI_MULTIPLIER_MASK);
111 }
112
113 adpa = 0;
114 if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
115 adpa |= ADPA_HSYNC_ACTIVE_HIGH;
116 if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
117 adpa |= ADPA_VSYNC_ACTIVE_HIGH;
118
119 if (gma_crtc->pipe == 0)
120 adpa |= ADPA_PIPE_A_SELECT;
121 else
122 adpa |= ADPA_PIPE_B_SELECT;
123
124 REG_WRITE(adpa_reg, adpa);
125 }
126
127
128 /**
129 * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect CRT presence.
130 *
131 * \return true if CRT is connected.
132 * \return false if CRT is disconnected.
133 */
cdv_intel_crt_detect_hotplug(struct drm_connector * connector,bool force)134 static bool cdv_intel_crt_detect_hotplug(struct drm_connector *connector,
135 bool force)
136 {
137 struct drm_device *dev = connector->dev;
138 u32 hotplug_en;
139 int i, tries = 0, ret = false;
140 u32 orig;
141
142 /*
143 * On a CDV thep, CRT detect sequence need to be done twice
144 * to get a reliable result.
145 */
146 tries = 2;
147
148 orig = hotplug_en = REG_READ(PORT_HOTPLUG_EN);
149 hotplug_en &= ~(CRT_HOTPLUG_DETECT_MASK);
150 hotplug_en |= CRT_HOTPLUG_FORCE_DETECT;
151
152 hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64;
153 hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
154
155 for (i = 0; i < tries ; i++) {
156 unsigned long timeout;
157 /* turn on the FORCE_DETECT */
158 REG_WRITE(PORT_HOTPLUG_EN, hotplug_en);
159 timeout = jiffies + msecs_to_jiffies(1000);
160 /* wait for FORCE_DETECT to go off */
161 do {
162 if (!(REG_READ(PORT_HOTPLUG_EN) &
163 CRT_HOTPLUG_FORCE_DETECT))
164 break;
165 msleep(1);
166 } while (time_after(timeout, jiffies));
167 }
168
169 if ((REG_READ(PORT_HOTPLUG_STAT) & CRT_HOTPLUG_MONITOR_MASK) !=
170 CRT_HOTPLUG_MONITOR_NONE)
171 ret = true;
172
173 /* clear the interrupt we just generated, if any */
174 REG_WRITE(PORT_HOTPLUG_STAT, CRT_HOTPLUG_INT_STATUS);
175
176 /* and put the bits back */
177 REG_WRITE(PORT_HOTPLUG_EN, orig);
178 return ret;
179 }
180
cdv_intel_crt_detect(struct drm_connector * connector,bool force)181 static enum drm_connector_status cdv_intel_crt_detect(
182 struct drm_connector *connector, bool force)
183 {
184 if (cdv_intel_crt_detect_hotplug(connector, force))
185 return connector_status_connected;
186 else
187 return connector_status_disconnected;
188 }
189
cdv_intel_crt_destroy(struct drm_connector * connector)190 static void cdv_intel_crt_destroy(struct drm_connector *connector)
191 {
192 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
193
194 psb_intel_i2c_destroy(gma_encoder->ddc_bus);
195 drm_connector_unregister(connector);
196 drm_connector_cleanup(connector);
197 kfree(connector);
198 }
199
cdv_intel_crt_get_modes(struct drm_connector * connector)200 static int cdv_intel_crt_get_modes(struct drm_connector *connector)
201 {
202 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
203 return psb_intel_ddc_get_modes(connector,
204 &gma_encoder->ddc_bus->adapter);
205 }
206
cdv_intel_crt_set_property(struct drm_connector * connector,struct drm_property * property,uint64_t value)207 static int cdv_intel_crt_set_property(struct drm_connector *connector,
208 struct drm_property *property,
209 uint64_t value)
210 {
211 return 0;
212 }
213
214 /*
215 * Routines for controlling stuff on the analog port
216 */
217
218 static const struct drm_encoder_helper_funcs cdv_intel_crt_helper_funcs = {
219 .dpms = cdv_intel_crt_dpms,
220 .prepare = gma_encoder_prepare,
221 .commit = gma_encoder_commit,
222 .mode_set = cdv_intel_crt_mode_set,
223 };
224
225 static const struct drm_connector_funcs cdv_intel_crt_connector_funcs = {
226 .dpms = drm_helper_connector_dpms,
227 .detect = cdv_intel_crt_detect,
228 .fill_modes = drm_helper_probe_single_connector_modes,
229 .destroy = cdv_intel_crt_destroy,
230 .set_property = cdv_intel_crt_set_property,
231 };
232
233 static const struct drm_connector_helper_funcs
234 cdv_intel_crt_connector_helper_funcs = {
235 .mode_valid = cdv_intel_crt_mode_valid,
236 .get_modes = cdv_intel_crt_get_modes,
237 .best_encoder = gma_best_encoder,
238 };
239
cdv_intel_crt_enc_destroy(struct drm_encoder * encoder)240 static void cdv_intel_crt_enc_destroy(struct drm_encoder *encoder)
241 {
242 drm_encoder_cleanup(encoder);
243 }
244
245 static const struct drm_encoder_funcs cdv_intel_crt_enc_funcs = {
246 .destroy = cdv_intel_crt_enc_destroy,
247 };
248
cdv_intel_crt_init(struct drm_device * dev,struct psb_intel_mode_device * mode_dev)249 void cdv_intel_crt_init(struct drm_device *dev,
250 struct psb_intel_mode_device *mode_dev)
251 {
252
253 struct gma_connector *gma_connector;
254 struct gma_encoder *gma_encoder;
255 struct drm_connector *connector;
256 struct drm_encoder *encoder;
257
258 u32 i2c_reg;
259
260 gma_encoder = kzalloc(sizeof(struct gma_encoder), GFP_KERNEL);
261 if (!gma_encoder)
262 return;
263
264 gma_connector = kzalloc(sizeof(struct gma_connector), GFP_KERNEL);
265 if (!gma_connector)
266 goto failed_connector;
267
268 connector = &gma_connector->base;
269 connector->polled = DRM_CONNECTOR_POLL_HPD;
270 drm_connector_init(dev, connector,
271 &cdv_intel_crt_connector_funcs, DRM_MODE_CONNECTOR_VGA);
272
273 encoder = &gma_encoder->base;
274 drm_encoder_init(dev, encoder,
275 &cdv_intel_crt_enc_funcs, DRM_MODE_ENCODER_DAC, NULL);
276
277 gma_connector_attach_encoder(gma_connector, gma_encoder);
278
279 /* Set up the DDC bus. */
280 i2c_reg = GPIOA;
281 /* Remove the following code for CDV */
282 /*
283 if (dev_priv->crt_ddc_bus != 0)
284 i2c_reg = dev_priv->crt_ddc_bus;
285 }*/
286 gma_encoder->ddc_bus = psb_intel_i2c_create(dev,
287 i2c_reg, "CRTDDC_A");
288 if (!gma_encoder->ddc_bus) {
289 dev_printk(KERN_ERR, &dev->pdev->dev, "DDC bus registration "
290 "failed.\n");
291 goto failed_ddc;
292 }
293
294 gma_encoder->type = INTEL_OUTPUT_ANALOG;
295 /*
296 psb_intel_output->clone_mask = (1 << INTEL_ANALOG_CLONE_BIT);
297 psb_intel_output->crtc_mask = (1 << 0) | (1 << 1);
298 */
299 connector->interlace_allowed = 0;
300 connector->doublescan_allowed = 0;
301
302 drm_encoder_helper_add(encoder, &cdv_intel_crt_helper_funcs);
303 drm_connector_helper_add(connector,
304 &cdv_intel_crt_connector_helper_funcs);
305
306 drm_connector_register(connector);
307
308 return;
309 failed_ddc:
310 drm_encoder_cleanup(&gma_encoder->base);
311 drm_connector_cleanup(&gma_connector->base);
312 kfree(gma_connector);
313 failed_connector:
314 kfree(gma_encoder);
315 return;
316 }
317