git.oblomov.eu Git - linux-2.6/blob - drivers/gpu/drm/i915/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_encoder *encoder, int mode)
  37 {
  38         struct drm_device *dev = encoder->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 DRM_MODE_DPMS_ON:
  48                 temp |= ADPA_DAC_ENABLE;
  49                 break;
  50         case DRM_MODE_DPMS_STANDBY:
  51                 temp |= ADPA_DAC_ENABLE | ADPA_HSYNC_CNTL_DISABLE;
  52                 break;
  53         case DRM_MODE_DPMS_SUSPEND:
  54                 temp |= ADPA_DAC_ENABLE | ADPA_VSYNC_CNTL_DISABLE;
  55                 break;
  56         case DRM_MODE_DPMS_OFF:
  57                 temp |= ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE;
  58                 break;
  59         }
  60
  61         I915_WRITE(ADPA, temp);
  62 }
  63
  64 static int intel_crt_mode_valid(struct drm_connector *connector,
  65                                 struct drm_display_mode *mode)
  66 {
  67         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
  68                 return MODE_NO_DBLESCAN;
  69
  70         if (mode->clock > 400000 || mode->clock < 25000)
  71                 return MODE_CLOCK_RANGE;
  72
  73         return MODE_OK;
  74 }
  75
  76 static bool intel_crt_mode_fixup(struct drm_encoder *encoder,
  77                                  struct drm_display_mode *mode,
  78                                  struct drm_display_mode *adjusted_mode)
  79 {
  80         return true;
  81 }
  82
  83 static void intel_crt_mode_set(struct drm_encoder *encoder,
  84                                struct drm_display_mode *mode,
  85                                struct drm_display_mode *adjusted_mode)
  86 {
  87
  88         struct drm_device *dev = encoder->dev;
  89         struct drm_crtc *crtc = encoder->crtc;
  90         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
  91         struct drm_i915_private *dev_priv = dev->dev_private;
  92         int dpll_md_reg;
  93         u32 adpa, dpll_md;
  94
  95         if (intel_crtc->pipe == 0)
  96                 dpll_md_reg = DPLL_A_MD;
  97         else
  98                 dpll_md_reg = DPLL_B_MD;
  99
 100         /*
 101          * Disable separate mode multiplier used when cloning SDVO to CRT
 102          * XXX this needs to be adjusted when we really are cloning
 103          */
 104         if (IS_I965G(dev)) {
 105                 dpll_md = I915_READ(dpll_md_reg);
 106                 I915_WRITE(dpll_md_reg,
 107                            dpll_md & ~DPLL_MD_UDI_MULTIPLIER_MASK);
 108         }
 109
 110         adpa = 0;
 111         if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
 112                 adpa |= ADPA_HSYNC_ACTIVE_HIGH;
 113         if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
 114                 adpa |= ADPA_VSYNC_ACTIVE_HIGH;
 115
 116         if (intel_crtc->pipe == 0)
 117                 adpa |= ADPA_PIPE_A_SELECT;
 118         else
 119                 adpa |= ADPA_PIPE_B_SELECT;
 120
 121         I915_WRITE(ADPA, adpa);
 122 }
 123
 124 /**
 125  * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect CRT presence.
 126  *
 127  * Not for i915G/i915GM
 128  *
 129  * \return true if CRT is connected.
 130  * \return false if CRT is disconnected.
 131  */
 132 static bool intel_crt_detect_hotplug(struct drm_connector *connector)
 133 {
 134         struct drm_device *dev = connector->dev;
 135         struct drm_i915_private *dev_priv = dev->dev_private;
 136         u32 temp;
 137
 138         unsigned long timeout = jiffies + msecs_to_jiffies(1000);
 139
 140         temp = I915_READ(PORT_HOTPLUG_EN);
 141
 142         I915_WRITE(PORT_HOTPLUG_EN,
 143                    temp | CRT_HOTPLUG_FORCE_DETECT | (1 << 5));
 144
 145         do {
 146                 if (!(I915_READ(PORT_HOTPLUG_EN) & CRT_HOTPLUG_FORCE_DETECT))
 147                         break;
 148                 msleep(1);
 149         } while (time_after(timeout, jiffies));
 150
 151         if ((I915_READ(PORT_HOTPLUG_STAT) & CRT_HOTPLUG_MONITOR_MASK) ==
 152             CRT_HOTPLUG_MONITOR_COLOR)
 153                 return true;
 154
 155         return false;
 156 }
 157
 158 static bool intel_crt_detect_ddc(struct drm_connector *connector)
 159 {
 160         struct intel_output *intel_output = to_intel_output(connector);
 161
 162         /* CRT should always be at 0, but check anyway */
 163         if (intel_output->type != INTEL_OUTPUT_ANALOG)
 164                 return false;
 165
 166         return intel_ddc_probe(intel_output);
 167 }
 168
 169 static enum drm_connector_status intel_crt_detect(struct drm_connector *connector)
 170 {
 171         struct drm_device *dev = connector->dev;
 172
 173         if (IS_I9XX(dev) && !IS_I915G(dev) && !IS_I915GM(dev)) {
 174                 if (intel_crt_detect_hotplug(connector))
 175                         return connector_status_connected;
 176                 else
 177                         return connector_status_disconnected;
 178         }
 179
 180         if (intel_crt_detect_ddc(connector))
 181                 return connector_status_connected;
 182
 183         /* TODO use load detect */
 184         return connector_status_unknown;
 185 }
 186
 187 static void intel_crt_destroy(struct drm_connector *connector)
 188 {
 189         struct intel_output *intel_output = to_intel_output(connector);
 190
 191         intel_i2c_destroy(intel_output->ddc_bus);
 192         drm_sysfs_connector_remove(connector);
 193         drm_connector_cleanup(connector);
 194         kfree(connector);
 195 }
 196
 197 static int intel_crt_get_modes(struct drm_connector *connector)
 198 {
 199         struct intel_output *intel_output = to_intel_output(connector);
 200         return intel_ddc_get_modes(intel_output);
 201 }
 202
 203 static int intel_crt_set_property(struct drm_connector *connector,
 204                                   struct drm_property *property,
 205                                   uint64_t value)
 206 {
 207         struct drm_device *dev = connector->dev;
 208
 209         if (property == dev->mode_config.dpms_property && connector->encoder)
 210                 intel_crt_dpms(connector->encoder, (uint32_t)(value & 0xf));
 211
 212         return 0;
 213 }
 214
 215 /*
 216  * Routines for controlling stuff on the analog port
 217  */
 218
 219 static const struct drm_encoder_helper_funcs intel_crt_helper_funcs = {
 220         .dpms = intel_crt_dpms,
 221         .mode_fixup = intel_crt_mode_fixup,
 222         .prepare = intel_encoder_prepare,
 223         .commit = intel_encoder_commit,
 224         .mode_set = intel_crt_mode_set,
 225 };
 226
 227 static const struct drm_connector_funcs intel_crt_connector_funcs = {
 228         .detect = intel_crt_detect,
 229         .fill_modes = drm_helper_probe_single_connector_modes,
 230         .destroy = intel_crt_destroy,
 231         .set_property = intel_crt_set_property,
 232 };
 233
 234 static const struct drm_connector_helper_funcs intel_crt_connector_helper_funcs = {
 235         .mode_valid = intel_crt_mode_valid,
 236         .get_modes = intel_crt_get_modes,
 237         .best_encoder = intel_best_encoder,
 238 };
 239
 240 static void intel_crt_enc_destroy(struct drm_encoder *encoder)
 241 {
 242         drm_encoder_cleanup(encoder);
 243 }
 244
 245 static const struct drm_encoder_funcs intel_crt_enc_funcs = {
 246         .destroy = intel_crt_enc_destroy,
 247 };
 248
 249 void intel_crt_init(struct drm_device *dev)
 250 {
 251         struct drm_connector *connector;
 252         struct intel_output *intel_output;
 253
 254         intel_output = kzalloc(sizeof(struct intel_output), GFP_KERNEL);
 255         if (!intel_output)
 256                 return;
 257
 258         connector = &intel_output->base;
 259         drm_connector_init(dev, &intel_output->base,
 260                            &intel_crt_connector_funcs, DRM_MODE_CONNECTOR_VGA);
 261
 262         drm_encoder_init(dev, &intel_output->enc, &intel_crt_enc_funcs,
 263                          DRM_MODE_ENCODER_DAC);
 264
 265         drm_mode_connector_attach_encoder(&intel_output->base,
 266                                           &intel_output->enc);
 267
 268         /* Set up the DDC bus. */
 269         intel_output->ddc_bus = intel_i2c_create(dev, GPIOA, "CRTDDC_A");
 270         if (!intel_output->ddc_bus) {
 271                 dev_printk(KERN_ERR, &dev->pdev->dev, "DDC bus registration "
 272                            "failed.\n");
 273                 return;
 274         }
 275
 276         intel_output->type = INTEL_OUTPUT_ANALOG;
 277         connector->interlace_allowed = 0;
 278         connector->doublescan_allowed = 0;
 279
 280         drm_encoder_helper_add(&intel_output->enc, &intel_crt_helper_funcs);
 281         drm_connector_helper_add(connector, &intel_crt_connector_helper_funcs);
 282
 283         drm_sysfs_connector_add(connector);
 284 }