linux-core/intel_crt.c

   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 "drmP.h"
  29 #include "drm.h"
  30 #include "drm_crtc.h"
  31 #include "drm_crtc_helper.h"
  32 #include "intel_drv.h"
  33 #include "i915_drm.h"
  34 #include "i915_drv.h"
  35
  36 static void intel_crt_dpms(struct drm_output *output, int mode)
  37 {
  38         struct drm_device *dev = output->dev;
  39         struct drm_i915_private *dev_priv = dev->dev_private;
  40         u32 temp;
  41
  42         temp = I915_READ(ADPA);
  43         temp &= ~(ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE);
  44         temp &= ~ADPA_DAC_ENABLE;
  45
  46         switch(mode) {
  47         case DPMSModeOn:
  48                 temp |= ADPA_DAC_ENABLE;
  49                 break;
  50         case DPMSModeStandby:
  51                 temp |= ADPA_DAC_ENABLE | ADPA_HSYNC_CNTL_DISABLE;
  52                 break;
  53         case DPMSModeSuspend:
  54                 temp |= ADPA_DAC_ENABLE | ADPA_VSYNC_CNTL_DISABLE;
  55                 break;
  56         case DPMSModeOff:
  57                 temp |= ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE;
  58                 break;
  59         }
  60
  61         I915_WRITE(ADPA, temp);
  62 }
  63
  64 static void intel_crt_save(struct drm_output *output)
  65 {
  66
  67 }
  68
  69 static void intel_crt_restore(struct drm_output *output)
  70 {
  71
  72 }
  73
  74 static int intel_crt_mode_valid(struct drm_output *output,
  75                                 struct drm_display_mode *mode)
  76 {
  77         if (mode->flags & V_DBLSCAN)
  78                 return MODE_NO_DBLESCAN;
  79
  80         if (mode->clock > 400000 || mode->clock < 25000)
  81                 return MODE_CLOCK_RANGE;
  82
  83         return MODE_OK;
  84 }
  85
  86 static bool intel_crt_mode_fixup(struct drm_output *output,
  87                                  struct drm_display_mode *mode,
  88                                  struct drm_display_mode *adjusted_mode)
  89 {
  90         return true;
  91 }
  92
  93 static void intel_crt_mode_set(struct drm_output *output,
  94                                struct drm_display_mode *mode,
  95                                struct drm_display_mode *adjusted_mode)
  96 {
  97         struct drm_device *dev = output->dev;
  98         struct drm_crtc *crtc = output->crtc;
  99         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 100         struct drm_i915_private *dev_priv = dev->dev_private;
 101         int dpll_md_reg;
 102         u32 adpa, dpll_md;
 103
 104         if (intel_crtc->pipe == 0)
 105                 dpll_md_reg = DPLL_A_MD;
 106         else
 107                 dpll_md_reg = DPLL_B_MD;
 108
 109         /*
 110          * Disable separate mode multiplier used when cloning SDVO to CRT
 111          * XXX this needs to be adjusted when we really are cloning
 112          */
 113         if (IS_I965G(dev)) {
 114                 dpll_md = I915_READ(dpll_md_reg);
 115                 I915_WRITE(dpll_md_reg,
 116                            dpll_md & ~DPLL_MD_UDI_MULTIPLIER_MASK);
 117         }
 118
 119         adpa = 0;
 120         if (adjusted_mode->flags & V_PHSYNC)
 121                 adpa |= ADPA_HSYNC_ACTIVE_HIGH;
 122         if (adjusted_mode->flags & V_PVSYNC)
 123                 adpa |= ADPA_VSYNC_ACTIVE_HIGH;
 124
 125         if (intel_crtc->pipe == 0)
 126                 adpa |= ADPA_PIPE_A_SELECT;
 127         else
 128                 adpa |= ADPA_PIPE_B_SELECT;
 129
 130         I915_WRITE(ADPA, adpa);
 131 }
 132
 133 /**
 134  * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect CRT presence.
 135  *
 136  * Not for i915G/i915GM
 137  *
 138  * \return TRUE if CRT is connected.
 139  * \return FALSE if CRT is disconnected.
 140  */
 141 static bool intel_crt_detect_hotplug(struct drm_output *output)
 142 {
 143         struct drm_device *dev = output->dev;
 144         struct drm_i915_private *dev_priv = dev->dev_private;
 145         u32 temp;
 146
 147         unsigned long timeout = jiffies + msecs_to_jiffies(1000);
 148
 149         temp = I915_READ(PORT_HOTPLUG_EN);
 150
 151         I915_WRITE(PORT_HOTPLUG_EN,
 152                    temp | CRT_HOTPLUG_FORCE_DETECT | (1 << 5));
 153
 154         do {
 155                 if (!(I915_READ(PORT_HOTPLUG_EN) & CRT_HOTPLUG_FORCE_DETECT))
 156                         break;
 157                 msleep(1);
 158         } while (time_after(timeout, jiffies));
 159
 160         if ((I915_READ(PORT_HOTPLUG_STAT) & CRT_HOTPLUG_MONITOR_MASK) ==
 161             CRT_HOTPLUG_MONITOR_COLOR)
 162                 return true;
 163
 164         return false;
 165 }
 166
 167 static bool intel_crt_detect_ddc(struct drm_output *output)
 168 {
 169         struct intel_output *intel_output = to_intel_output(output);
 170
 171         /* CRT should always be at 0, but check anyway */
 172         if (intel_output->type != INTEL_OUTPUT_ANALOG)
 173                 return false;
 174
 175         return intel_ddc_probe(output);
 176 }
 177
 178 static enum drm_output_status intel_crt_detect(struct drm_output *output)
 179 {
 180         struct drm_device *dev = output->dev;
 181
 182         if (IS_I9XX(dev) && !IS_I915G(dev) && !IS_I915GM(dev)) {
 183                 if (intel_crt_detect_hotplug(output))
 184                         return output_status_connected;
 185                 else
 186                         return output_status_disconnected;
 187         }
 188
 189         if (intel_crt_detect_ddc(output))
 190                 return output_status_connected;
 191
 192         /* TODO use load detect */
 193         return output_status_unknown;
 194 }
 195
 196 static void intel_crt_destroy(struct drm_output *output)
 197 {
 198         struct intel_output *intel_output = to_intel_output(output);
 199
 200         intel_i2c_destroy(intel_output->ddc_bus);
 201         drm_output_cleanup(output);
 202         kfree(output);
 203 }
 204
 205 static int intel_crt_get_modes(struct drm_output *output)
 206 {
 207         return intel_ddc_get_modes(output);
 208 }
 209
 210 static bool intel_crt_set_property(struct drm_output *output,
 211                                   struct drm_property *property,
 212                                   uint64_t value)
 213 {
 214         struct drm_device *dev = output->dev;
 215
 216         if (property == dev->mode_config.dpms_property)
 217                 intel_crt_dpms(output, (uint32_t)(value & 0xf));
 218
 219         return true;
 220 }
 221
 222 /*
 223  * Routines for controlling stuff on the analog port
 224  */
 225
 226 static const struct drm_output_helper_funcs intel_crt_helper_funcs = {
 227         .mode_fixup = intel_crt_mode_fixup,
 228         .prepare = intel_output_prepare,
 229         .commit = intel_output_commit,
 230         .mode_set = intel_crt_mode_set,
 231 };
 232
 233 static const struct drm_output_funcs intel_crt_output_funcs = {
 234         .dpms = intel_crt_dpms,
 235         .save = intel_crt_save,
 236         .restore = intel_crt_restore,
 237         .detect = intel_crt_detect,
 238         .get_modes = intel_crt_get_modes,
 239         .destroy = intel_crt_destroy,
 240         .set_property = intel_crt_set_property,
 241         .mode_valid = intel_crt_mode_valid,
 242
 243 };
 244
 245 void intel_crt_enc_destroy(struct drm_encoder *encoder)
 246 {
 247         drm_encoder_cleanup(encoder);
 248 }
 249
 250 static const struct drm_encoder_funcs intel_crt_enc_funcs = {
 251         .destroy = intel_crt_enc_destroy,
 252 };
 253
 254 void intel_crt_init(struct drm_device *dev)
 255 {
 256         struct drm_output *output;
 257         struct intel_output *intel_output;
 258
 259         intel_output = kzalloc(sizeof(struct intel_output), GFP_KERNEL);
 260         if (!intel_output)
 261                 return;
 262
 263         output = &intel_output->base;
 264         drm_output_init(dev, &intel_output->base, &intel_crt_output_funcs, DRM_MODE_OUTPUT_VGA);
 265
 266         drm_encoder_init(dev, &intel_output->enc, &intel_crt_enc_funcs, DRM_MODE_ENCODER_DAC);
 267
 268         drm_mode_output_attach_encoder(&intel_output->base, &intel_output->enc);
 269
 270         /* Set up the DDC bus. */
 271         intel_output->ddc_bus = intel_i2c_create(dev, GPIOA, "CRTDDC_A");
 272         if (!intel_output->ddc_bus) {
 273                 dev_printk(KERN_ERR, &dev->pdev->dev, "DDC bus registration "
 274                            "failed.\n");
 275                 intel_crt_destroy(output);
 276                 return;
 277         }
 278
 279         intel_output->type = INTEL_OUTPUT_ANALOG;
 280         output->interlace_allowed = 0;
 281         output->doublescan_allowed = 0;
 282
 283         drm_output_helper_add(output, &intel_crt_helper_funcs);
 284
 285         drm_sysfs_output_add(output);
 286 }