2 * Copyright © 2006-2007 Intel Corporation
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:
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
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.
24 * Eric Anholt <eric@anholt.net>
27 #include <linux/i2c.h>
31 #include "drm_crtc_helper.h"
32 #include "intel_drv.h"
36 static void intel_crt_dpms(struct drm_encoder
*encoder
, int mode
)
38 struct drm_device
*dev
= encoder
->dev
;
39 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
42 temp
= I915_READ(ADPA
);
43 temp
&= ~(ADPA_HSYNC_CNTL_DISABLE
| ADPA_VSYNC_CNTL_DISABLE
);
44 temp
|= ADPA_DAC_ENABLE
;
47 case DRM_MODE_DPMS_ON
:
48 temp
|= ADPA_DAC_ENABLE
;
50 case DRM_MODE_DPMS_STANDBY
:
51 temp
|= ADPA_DAC_ENABLE
| ADPA_HSYNC_CNTL_DISABLE
;
53 case DRM_MODE_DPMS_SUSPEND
:
54 temp
|= ADPA_DAC_ENABLE
| ADPA_VSYNC_CNTL_DISABLE
;
56 case DRM_MODE_DPMS_OFF
:
57 temp
|= ADPA_HSYNC_CNTL_DISABLE
| ADPA_VSYNC_CNTL_DISABLE
;
61 I915_WRITE(ADPA
, temp
);
64 static int intel_crt_mode_valid(struct drm_connector
*connector
,
65 struct drm_display_mode
*mode
)
67 struct drm_device
*dev
= connector
->dev
;
70 if (mode
->flags
& DRM_MODE_FLAG_DBLSCAN
)
71 return MODE_NO_DBLESCAN
;
73 if (mode
->clock
< 25000)
74 return MODE_CLOCK_LOW
;
80 if (mode
->clock
> max_clock
)
81 return MODE_CLOCK_HIGH
;
86 static bool intel_crt_mode_fixup(struct drm_encoder
*encoder
,
87 struct drm_display_mode
*mode
,
88 struct drm_display_mode
*adjusted_mode
)
93 static void intel_crt_mode_set(struct drm_encoder
*encoder
,
94 struct drm_display_mode
*mode
,
95 struct drm_display_mode
*adjusted_mode
)
98 struct drm_device
*dev
= encoder
->dev
;
99 struct drm_crtc
*crtc
= encoder
->crtc
;
100 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
101 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
105 if (intel_crtc
->pipe
== 0)
106 dpll_md_reg
= DPLL_A_MD
;
108 dpll_md_reg
= DPLL_B_MD
;
111 * Disable separate mode multiplier used when cloning SDVO to CRT
112 * XXX this needs to be adjusted when we really are cloning
115 dpll_md
= I915_READ(dpll_md_reg
);
116 I915_WRITE(dpll_md_reg
,
117 dpll_md
& ~DPLL_MD_UDI_MULTIPLIER_MASK
);
121 if (adjusted_mode
->flags
& DRM_MODE_FLAG_PHSYNC
)
122 adpa
|= ADPA_HSYNC_ACTIVE_HIGH
;
123 if (adjusted_mode
->flags
& DRM_MODE_FLAG_PVSYNC
)
124 adpa
|= ADPA_VSYNC_ACTIVE_HIGH
;
126 if (intel_crtc
->pipe
== 0) {
127 adpa
|= ADPA_PIPE_A_SELECT
;
128 I915_WRITE(BCLRPAT_A
, 0);
130 adpa
|= ADPA_PIPE_B_SELECT
;
131 I915_WRITE(BCLRPAT_B
, 0);
134 I915_WRITE(ADPA
, adpa
);
138 * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect CRT presence.
140 * Not for i915G/i915GM
142 * \return true if CRT is connected.
143 * \return false if CRT is disconnected.
145 static bool intel_crt_detect_hotplug(struct drm_connector
*connector
)
147 struct drm_device
*dev
= connector
->dev
;
148 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
152 * On 4 series desktop, CRT detect sequence need to be done twice
153 * to get a reliable result.
156 if (IS_G4X(dev
) && !IS_GM45(dev
))
160 hotplug_en
= I915_READ(PORT_HOTPLUG_EN
);
161 hotplug_en
&= CRT_FORCE_HOTPLUG_MASK
;
162 hotplug_en
|= CRT_HOTPLUG_FORCE_DETECT
;
165 hotplug_en
|= CRT_HOTPLUG_ACTIVATION_PERIOD_64
;
167 hotplug_en
|= CRT_HOTPLUG_VOLTAGE_COMPARE_50
;
169 for (i
= 0; i
< tries
; i
++) {
170 unsigned long timeout
;
171 /* turn on the FORCE_DETECT */
172 I915_WRITE(PORT_HOTPLUG_EN
, hotplug_en
);
173 timeout
= jiffies
+ msecs_to_jiffies(1000);
174 /* wait for FORCE_DETECT to go off */
176 if (!(I915_READ(PORT_HOTPLUG_EN
) &
177 CRT_HOTPLUG_FORCE_DETECT
))
180 } while (time_after(timeout
, jiffies
));
183 if ((I915_READ(PORT_HOTPLUG_STAT
) & CRT_HOTPLUG_MONITOR_MASK
) ==
184 CRT_HOTPLUG_MONITOR_COLOR
)
190 static bool intel_crt_detect_ddc(struct drm_connector
*connector
)
192 struct intel_output
*intel_output
= to_intel_output(connector
);
194 /* CRT should always be at 0, but check anyway */
195 if (intel_output
->type
!= INTEL_OUTPUT_ANALOG
)
198 return intel_ddc_probe(intel_output
);
201 static enum drm_connector_status
intel_crt_detect(struct drm_connector
*connector
)
203 struct drm_device
*dev
= connector
->dev
;
205 if (IS_I9XX(dev
) && !IS_I915G(dev
) && !IS_I915GM(dev
)) {
206 if (intel_crt_detect_hotplug(connector
))
207 return connector_status_connected
;
209 return connector_status_disconnected
;
212 if (intel_crt_detect_ddc(connector
))
213 return connector_status_connected
;
215 /* TODO use load detect */
216 return connector_status_unknown
;
219 static void intel_crt_destroy(struct drm_connector
*connector
)
221 struct intel_output
*intel_output
= to_intel_output(connector
);
223 intel_i2c_destroy(intel_output
->ddc_bus
);
224 drm_sysfs_connector_remove(connector
);
225 drm_connector_cleanup(connector
);
229 static int intel_crt_get_modes(struct drm_connector
*connector
)
231 struct intel_output
*intel_output
= to_intel_output(connector
);
232 return intel_ddc_get_modes(intel_output
);
235 static int intel_crt_set_property(struct drm_connector
*connector
,
236 struct drm_property
*property
,
239 struct drm_device
*dev
= connector
->dev
;
241 if (property
== dev
->mode_config
.dpms_property
&& connector
->encoder
)
242 intel_crt_dpms(connector
->encoder
, (uint32_t)(value
& 0xf));
248 * Routines for controlling stuff on the analog port
251 static const struct drm_encoder_helper_funcs intel_crt_helper_funcs
= {
252 .dpms
= intel_crt_dpms
,
253 .mode_fixup
= intel_crt_mode_fixup
,
254 .prepare
= intel_encoder_prepare
,
255 .commit
= intel_encoder_commit
,
256 .mode_set
= intel_crt_mode_set
,
259 static const struct drm_connector_funcs intel_crt_connector_funcs
= {
260 .detect
= intel_crt_detect
,
261 .fill_modes
= drm_helper_probe_single_connector_modes
,
262 .destroy
= intel_crt_destroy
,
263 .set_property
= intel_crt_set_property
,
266 static const struct drm_connector_helper_funcs intel_crt_connector_helper_funcs
= {
267 .mode_valid
= intel_crt_mode_valid
,
268 .get_modes
= intel_crt_get_modes
,
269 .best_encoder
= intel_best_encoder
,
272 static void intel_crt_enc_destroy(struct drm_encoder
*encoder
)
274 drm_encoder_cleanup(encoder
);
277 static const struct drm_encoder_funcs intel_crt_enc_funcs
= {
278 .destroy
= intel_crt_enc_destroy
,
281 void intel_crt_init(struct drm_device
*dev
)
283 struct drm_connector
*connector
;
284 struct intel_output
*intel_output
;
286 intel_output
= kzalloc(sizeof(struct intel_output
), GFP_KERNEL
);
290 connector
= &intel_output
->base
;
291 drm_connector_init(dev
, &intel_output
->base
,
292 &intel_crt_connector_funcs
, DRM_MODE_CONNECTOR_VGA
);
294 drm_encoder_init(dev
, &intel_output
->enc
, &intel_crt_enc_funcs
,
295 DRM_MODE_ENCODER_DAC
);
297 drm_mode_connector_attach_encoder(&intel_output
->base
,
300 /* Set up the DDC bus. */
301 intel_output
->ddc_bus
= intel_i2c_create(dev
, GPIOA
, "CRTDDC_A");
302 if (!intel_output
->ddc_bus
) {
303 dev_printk(KERN_ERR
, &dev
->pdev
->dev
, "DDC bus registration "
308 intel_output
->type
= INTEL_OUTPUT_ANALOG
;
309 connector
->interlace_allowed
= 0;
310 connector
->doublescan_allowed
= 0;
312 drm_encoder_helper_add(&intel_output
->enc
, &intel_crt_helper_funcs
);
313 drm_connector_helper_add(connector
, &intel_crt_connector_helper_funcs
);
315 drm_sysfs_connector_add(connector
);