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 | |
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 | |
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 | |
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 | */ |
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(m: 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(msecs: 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 | |
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 | |
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(chan: ddc_bus); |
200 | drm_connector_cleanup(connector); |
201 | kfree(objp: gma_connector); |
202 | } |
203 | |
204 | static int cdv_intel_crt_get_modes(struct drm_connector *connector) |
205 | { |
206 | return psb_intel_ddc_get_modes(connector, adapter: connector->ddc); |
207 | } |
208 | |
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 | |
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(size: sizeof(struct gma_encoder), GFP_KERNEL); |
254 | if (!gma_encoder) |
255 | return; |
256 | |
257 | gma_connector = kzalloc(size: 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, name: "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 | funcs: &cdv_intel_crt_connector_funcs, |
272 | DRM_MODE_CONNECTOR_VGA, |
273 | ddc: &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(connector: gma_connector, encoder: 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, funcs: &cdv_intel_crt_helper_funcs); |
289 | drm_connector_helper_add(connector, |
290 | funcs: &cdv_intel_crt_connector_helper_funcs); |
291 | |
292 | return; |
293 | |
294 | err_connector_cleanup: |
295 | drm_connector_cleanup(connector: &gma_connector->base); |
296 | err_ddc_destroy: |
297 | gma_i2c_destroy(chan: ddc_bus); |
298 | err_free_connector: |
299 | kfree(objp: gma_connector); |
300 | err_free_encoder: |
301 | kfree(objp: gma_encoder); |
302 | return; |
303 | } |
304 | |