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/delay.h>
28 #include <linux/i2c.h>
29 #include <linux/pm_runtime.h>
30
31 #include <drm/drm_crtc_helper.h>
32 #include <drm/drm_modeset_helper_vtables.h>
33 #include <drm/drm_simple_kms_helper.h>
34
35 #include "cdv_device.h"
36 #include "intel_bios.h"
37 #include "power.h"
38 #include "psb_drv.h"
39 #include "psb_intel_drv.h"
40 #include "psb_intel_reg.h"
41
42
cdv_intel_crt_dpms(struct drm_encoder * encoder,int mode)43 static void cdv_intel_crt_dpms(struct drm_encoder *encoder, int mode)
44 {
45 struct drm_device *dev = encoder->dev;
46 u32 temp, reg;
47 reg = ADPA;
48
49 temp = REG_READ(reg);
50 temp &= ~(ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE);
51 temp &= ~ADPA_DAC_ENABLE;
52
53 switch (mode) {
54 case DRM_MODE_DPMS_ON:
55 temp |= ADPA_DAC_ENABLE;
56 break;
57 case DRM_MODE_DPMS_STANDBY:
58 temp |= ADPA_DAC_ENABLE | ADPA_HSYNC_CNTL_DISABLE;
59 break;
60 case DRM_MODE_DPMS_SUSPEND:
61 temp |= ADPA_DAC_ENABLE | ADPA_VSYNC_CNTL_DISABLE;
62 break;
63 case DRM_MODE_DPMS_OFF:
64 temp |= ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE;
65 break;
66 }
67
68 REG_WRITE(reg, temp);
69 }
70
cdv_intel_crt_mode_valid(struct drm_connector * connector,struct drm_display_mode * mode)71 static enum drm_mode_status cdv_intel_crt_mode_valid(struct drm_connector *connector,
72 struct drm_display_mode *mode)
73 {
74 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
75 return MODE_NO_DBLESCAN;
76
77 /* The lowest clock for CDV is 20000KHz */
78 if (mode->clock < 20000)
79 return MODE_CLOCK_LOW;
80
81 /* The max clock for CDV is 355 instead of 400 */
82 if (mode->clock > 355000)
83 return MODE_CLOCK_HIGH;
84
85 return MODE_OK;
86 }
87
cdv_intel_crt_mode_set(struct drm_encoder * encoder,struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)88 static void cdv_intel_crt_mode_set(struct drm_encoder *encoder,
89 struct drm_display_mode *mode,
90 struct drm_display_mode *adjusted_mode)
91 {
92
93 struct drm_device *dev = encoder->dev;
94 struct drm_crtc *crtc = encoder->crtc;
95 struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
96 int dpll_md_reg;
97 u32 adpa, dpll_md;
98 u32 adpa_reg;
99
100 if (gma_crtc->pipe == 0)
101 dpll_md_reg = DPLL_A_MD;
102 else
103 dpll_md_reg = DPLL_B_MD;
104
105 adpa_reg = ADPA;
106
107 /*
108 * Disable separate mode multiplier used when cloning SDVO to CRT
109 * XXX this needs to be adjusted when we really are cloning
110 */
111 {
112 dpll_md = REG_READ(dpll_md_reg);
113 REG_WRITE(dpll_md_reg,
114 dpll_md & ~DPLL_MD_UDI_MULTIPLIER_MASK);
115 }
116
117 adpa = 0;
118 if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
119 adpa |= ADPA_HSYNC_ACTIVE_HIGH;
120 if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
121 adpa |= ADPA_VSYNC_ACTIVE_HIGH;
122
123 if (gma_crtc->pipe == 0)
124 adpa |= ADPA_PIPE_A_SELECT;
125 else
126 adpa |= ADPA_PIPE_B_SELECT;
127
128 REG_WRITE(adpa_reg, adpa);
129 }
130
131
132 /*
133 * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect CRT presence.
134 *
135 * \return true if CRT is connected.
136 * \return false if CRT is disconnected.
137 */
cdv_intel_crt_detect_hotplug(struct drm_connector * connector,bool force)138 static bool cdv_intel_crt_detect_hotplug(struct drm_connector *connector,
139 bool force)
140 {
141 struct drm_device *dev = connector->dev;
142 u32 hotplug_en;
143 int i, tries = 0, ret = false;
144 u32 orig;
145
146 /*
147 * On a CDV thep, CRT detect sequence need to be done twice
148 * to get a reliable result.
149 */
150 tries = 2;
151
152 orig = hotplug_en = REG_READ(PORT_HOTPLUG_EN);
153 hotplug_en &= ~(CRT_HOTPLUG_DETECT_MASK);
154 hotplug_en |= CRT_HOTPLUG_FORCE_DETECT;
155
156 hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64;
157 hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
158
159 for (i = 0; i < tries ; i++) {
160 unsigned long timeout;
161 /* turn on the FORCE_DETECT */
162 REG_WRITE(PORT_HOTPLUG_EN, hotplug_en);
163 timeout = jiffies + msecs_to_jiffies(1000);
164 /* wait for FORCE_DETECT to go off */
165 do {
166 if (!(REG_READ(PORT_HOTPLUG_EN) &
167 CRT_HOTPLUG_FORCE_DETECT))
168 break;
169 msleep(1);
170 } while (time_after(timeout, jiffies));
171 }
172
173 if ((REG_READ(PORT_HOTPLUG_STAT) & CRT_HOTPLUG_MONITOR_MASK) !=
174 CRT_HOTPLUG_MONITOR_NONE)
175 ret = true;
176
177 /* clear the interrupt we just generated, if any */
178 REG_WRITE(PORT_HOTPLUG_STAT, CRT_HOTPLUG_INT_STATUS);
179
180 /* and put the bits back */
181 REG_WRITE(PORT_HOTPLUG_EN, orig);
182 return ret;
183 }
184
cdv_intel_crt_detect(struct drm_connector * connector,bool force)185 static enum drm_connector_status cdv_intel_crt_detect(
186 struct drm_connector *connector, bool force)
187 {
188 if (cdv_intel_crt_detect_hotplug(connector, force))
189 return connector_status_connected;
190 else
191 return connector_status_disconnected;
192 }
193
cdv_intel_crt_destroy(struct drm_connector * connector)194 static void cdv_intel_crt_destroy(struct drm_connector *connector)
195 {
196 struct gma_connector *gma_connector = to_gma_connector(connector);
197 struct gma_i2c_chan *ddc_bus = to_gma_i2c_chan(connector->ddc);
198
199 gma_i2c_destroy(ddc_bus);
200 drm_connector_cleanup(connector);
201 kfree(gma_connector);
202 }
203
cdv_intel_crt_get_modes(struct drm_connector * connector)204 static int cdv_intel_crt_get_modes(struct drm_connector *connector)
205 {
206 return psb_intel_ddc_get_modes(connector, connector->ddc);
207 }
208
cdv_intel_crt_set_property(struct drm_connector * connector,struct drm_property * property,uint64_t value)209 static int cdv_intel_crt_set_property(struct drm_connector *connector,
210 struct drm_property *property,
211 uint64_t value)
212 {
213 return 0;
214 }
215
216 /*
217 * Routines for controlling stuff on the analog port
218 */
219
220 static const struct drm_encoder_helper_funcs cdv_intel_crt_helper_funcs = {
221 .dpms = cdv_intel_crt_dpms,
222 .prepare = gma_encoder_prepare,
223 .commit = gma_encoder_commit,
224 .mode_set = cdv_intel_crt_mode_set,
225 };
226
227 static const struct drm_connector_funcs cdv_intel_crt_connector_funcs = {
228 .dpms = drm_helper_connector_dpms,
229 .detect = cdv_intel_crt_detect,
230 .fill_modes = drm_helper_probe_single_connector_modes,
231 .destroy = cdv_intel_crt_destroy,
232 .set_property = cdv_intel_crt_set_property,
233 };
234
235 static const struct drm_connector_helper_funcs
236 cdv_intel_crt_connector_helper_funcs = {
237 .mode_valid = cdv_intel_crt_mode_valid,
238 .get_modes = cdv_intel_crt_get_modes,
239 .best_encoder = gma_best_encoder,
240 };
241
cdv_intel_crt_init(struct drm_device * dev,struct psb_intel_mode_device * mode_dev)242 void cdv_intel_crt_init(struct drm_device *dev,
243 struct psb_intel_mode_device *mode_dev)
244 {
245
246 struct gma_connector *gma_connector;
247 struct gma_encoder *gma_encoder;
248 struct gma_i2c_chan *ddc_bus;
249 struct drm_connector *connector;
250 struct drm_encoder *encoder;
251 int ret;
252
253 gma_encoder = kzalloc(sizeof(struct gma_encoder), GFP_KERNEL);
254 if (!gma_encoder)
255 return;
256
257 gma_connector = kzalloc(sizeof(struct gma_connector), GFP_KERNEL);
258 if (!gma_connector)
259 goto err_free_encoder;
260
261 /* Set up the DDC bus. */
262 ddc_bus = gma_i2c_create(dev, GPIOA, "CRTDDC_A");
263 if (!ddc_bus) {
264 dev_printk(KERN_ERR, dev->dev, "DDC bus registration failed.\n");
265 goto err_free_connector;
266 }
267
268 connector = &gma_connector->base;
269 connector->polled = DRM_CONNECTOR_POLL_HPD;
270 ret = drm_connector_init_with_ddc(dev, connector,
271 &cdv_intel_crt_connector_funcs,
272 DRM_MODE_CONNECTOR_VGA,
273 &ddc_bus->base);
274 if (ret)
275 goto err_ddc_destroy;
276
277 encoder = &gma_encoder->base;
278 ret = drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_DAC);
279 if (ret)
280 goto err_connector_cleanup;
281
282 gma_connector_attach_encoder(gma_connector, gma_encoder);
283
284 gma_encoder->type = INTEL_OUTPUT_ANALOG;
285 connector->interlace_allowed = 0;
286 connector->doublescan_allowed = 0;
287
288 drm_encoder_helper_add(encoder, &cdv_intel_crt_helper_funcs);
289 drm_connector_helper_add(connector,
290 &cdv_intel_crt_connector_helper_funcs);
291
292 return;
293
294 err_connector_cleanup:
295 drm_connector_cleanup(&gma_connector->base);
296 err_ddc_destroy:
297 gma_i2c_destroy(ddc_bus);
298 err_free_connector:
299 kfree(gma_connector);
300 err_free_encoder:
301 kfree(gma_encoder);
302 return;
303 }
304