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 "intel_drv.h"
35 static void intel_crt_dpms(struct drm_output *output, int mode)
37 struct drm_device *dev = output->dev;
38 struct drm_i915_private *dev_priv = dev->dev_private;
41 temp = I915_READ(ADPA);
42 temp &= ~(ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE);
43 temp &= ~ADPA_DAC_ENABLE;
47 temp |= ADPA_DAC_ENABLE;
50 temp |= ADPA_DAC_ENABLE | ADPA_HSYNC_CNTL_DISABLE;
53 temp |= ADPA_DAC_ENABLE | ADPA_VSYNC_CNTL_DISABLE;
56 temp |= ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE;
60 I915_WRITE(ADPA, temp);
63 static void intel_crt_save(struct drm_output *output)
68 static void intel_crt_restore(struct drm_output *output)
73 static int intel_crt_mode_valid(struct drm_output *output,
74 struct drm_display_mode *mode)
76 if (mode->flags & V_DBLSCAN)
77 return MODE_NO_DBLESCAN;
79 if (mode->clock > 400000 || mode->clock < 25000)
80 return MODE_CLOCK_RANGE;
85 static bool intel_crt_mode_fixup(struct drm_output *output,
86 struct drm_display_mode *mode,
87 struct drm_display_mode *adjusted_mode)
92 static void intel_crt_mode_set(struct drm_output *output,
93 struct drm_display_mode *mode,
94 struct drm_display_mode *adjusted_mode)
96 struct drm_device *dev = output->dev;
97 struct drm_crtc *crtc = output->crtc;
98 struct intel_crtc *intel_crtc = crtc->driver_private;
99 struct drm_i915_private *dev_priv = dev->dev_private;
103 if (intel_crtc->pipe == 0)
104 dpll_md_reg = DPLL_A_MD;
106 dpll_md_reg = DPLL_B_MD;
109 * Disable separate mode multiplier used when cloning SDVO to CRT
110 * XXX this needs to be adjusted when we really are cloning
113 dpll_md = I915_READ(dpll_md_reg);
114 I915_WRITE(dpll_md_reg,
115 dpll_md & ~DPLL_MD_UDI_MULTIPLIER_MASK);
119 if (adjusted_mode->flags & V_PHSYNC)
120 adpa |= ADPA_HSYNC_ACTIVE_HIGH;
121 if (adjusted_mode->flags & V_PVSYNC)
122 adpa |= ADPA_VSYNC_ACTIVE_HIGH;
124 if (intel_crtc->pipe == 0)
125 adpa |= ADPA_PIPE_A_SELECT;
127 adpa |= ADPA_PIPE_B_SELECT;
129 I915_WRITE(ADPA, adpa);
133 * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect CRT presence.
137 * \return TRUE if CRT is connected.
138 * \return FALSE if CRT is disconnected.
140 static bool intel_crt_detect_hotplug(struct drm_output *output)
142 struct drm_device *dev = output->dev;
143 struct drm_i915_private *dev_priv = dev->dev_private;
145 unsigned long timeout = jiffies + msecs_to_jiffies(1000);
147 temp = I915_READ(PORT_HOTPLUG_EN);
149 I915_WRITE(PORT_HOTPLUG_EN,
150 temp | CRT_HOTPLUG_FORCE_DETECT | (1 << 5));
153 if (!(I915_READ(PORT_HOTPLUG_EN) & CRT_HOTPLUG_FORCE_DETECT))
156 } while (time_after(timeout, jiffies));
158 if ((I915_READ(PORT_HOTPLUG_STAT) & CRT_HOTPLUG_MONITOR_MASK) ==
159 CRT_HOTPLUG_MONITOR_COLOR)
165 static bool intel_crt_detect_ddc(struct drm_output *output)
167 struct intel_output *intel_output = output->driver_private;
169 /* CRT should always be at 0, but check anyway */
170 if (intel_output->type != INTEL_OUTPUT_ANALOG)
173 return intel_ddc_probe(output);
176 static enum drm_output_status intel_crt_detect(struct drm_output *output)
178 struct drm_device *dev = output->dev;
180 if (IS_I945G(dev) || IS_I945GM(dev) || IS_I965G(dev)) {
181 if (intel_crt_detect_hotplug(output))
182 return output_status_connected;
184 return output_status_disconnected;
187 if (intel_crt_detect_ddc(output))
188 return output_status_connected;
190 /* TODO use load detect */
191 return output_status_unknown;
194 static void intel_crt_destroy(struct drm_output *output)
196 struct intel_output *intel_output = output->driver_private;
198 intel_i2c_destroy(intel_output->ddc_bus);
199 kfree(output->driver_private);
202 static int intel_crt_get_modes(struct drm_output *output)
204 return intel_ddc_get_modes(output);
208 * Routines for controlling stuff on the analog port
210 static const struct drm_output_funcs intel_crt_output_funcs = {
211 .dpms = intel_crt_dpms,
212 .save = intel_crt_save,
213 .restore = intel_crt_restore,
214 .mode_valid = intel_crt_mode_valid,
215 .mode_fixup = intel_crt_mode_fixup,
216 .prepare = intel_output_prepare,
217 .mode_set = intel_crt_mode_set,
218 .commit = intel_output_commit,
219 .detect = intel_crt_detect,
220 .get_modes = intel_crt_get_modes,
221 .cleanup = intel_crt_destroy,
224 void intel_crt_init(struct drm_device *dev)
226 struct drm_output *output;
227 struct intel_output *intel_output;
229 output = drm_output_create(dev, &intel_crt_output_funcs, "VGA");
231 intel_output = kmalloc(sizeof(struct intel_output), GFP_KERNEL);
233 drm_output_destroy(output);
236 /* Set up the DDC bus. */
237 intel_output->ddc_bus = intel_i2c_create(dev, GPIOA, "CRTDDC_A");
238 if (!intel_output->ddc_bus) {
239 dev_printk(KERN_ERR, &dev->pdev->dev, "DDC bus registration "
244 intel_output->type = INTEL_OUTPUT_ANALOG;
245 output->driver_private = intel_output;
246 output->interlace_allowed = 0;
247 output->doublescan_allowed = 0;