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_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 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_connector *connector)
  65 {
  66
  67 }
  68
  69 static void intel_crt_restore(struct drm_connector *connector)
  70 {
  71
  72 }
  73
  74 static int intel_crt_mode_valid(struct drm_connector *connector,
  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_encoder *encoder,
  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_encoder *encoder,
  94                                struct drm_display_mode *mode,
  95                                struct drm_display_mode *adjusted_mode)
  96 {
  97
  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;
 102         int dpll_md_reg;
 103         u32 adpa, dpll_md;
 104
 105         if (intel_crtc->pipe == 0)
 106                 dpll_md_reg = DPLL_A_MD;
 107         else
 108                 dpll_md_reg = DPLL_B_MD;
 109
 110         /*
 111          * Disable separate mode multiplier used when cloning SDVO to CRT
 112          * XXX this needs to be adjusted when we really are cloning
 113          */
 114         if (IS_I965G(dev)) {
 115                 dpll_md = I915_READ(dpll_md_reg);
 116                 I915_WRITE(dpll_md_reg,
 117                            dpll_md & ~DPLL_MD_UDI_MULTIPLIER_MASK);
 118         }
 119
 120         adpa = 0;
 121         if (adjusted_mode->flags & V_PHSYNC)
 122                 adpa |= ADPA_HSYNC_ACTIVE_HIGH;
 123         if (adjusted_mode->flags & V_PVSYNC)
 124                 adpa |= ADPA_VSYNC_ACTIVE_HIGH;
 125
 126         if (intel_crtc->pipe == 0)
 127                 adpa |= ADPA_PIPE_A_SELECT;
 128         else
 129                 adpa |= ADPA_PIPE_B_SELECT;
 130
 131         I915_WRITE(ADPA, adpa);
 132 }
 133
 134 /**
 135  * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect CRT presence.
 136  *
 137  * Not for i915G/i915GM
 138  *
 139  * \return TRUE if CRT is connected.
 140  * \return FALSE if CRT is disconnected.
 141  */
 142 static bool intel_crt_detect_hotplug(struct drm_connector *connector)
 143 {
 144         struct drm_device *dev = connector->dev;
 145         struct drm_i915_private *dev_priv = dev->dev_private;
 146         u32 temp;
 147
 148         unsigned long timeout = jiffies + msecs_to_jiffies(1000);
 149
 150         temp = I915_READ(PORT_HOTPLUG_EN);
 151
 152         I915_WRITE(PORT_HOTPLUG_EN,
 153                    temp | CRT_HOTPLUG_FORCE_DETECT | (1 << 5));
 154
 155         do {
 156                 if (!(I915_READ(PORT_HOTPLUG_EN) & CRT_HOTPLUG_FORCE_DETECT))
 157                         break;
 158                 msleep(1);
 159         } while (time_after(timeout, jiffies));
 160
 161         if ((I915_READ(PORT_HOTPLUG_STAT) & CRT_HOTPLUG_MONITOR_MASK) ==
 162             CRT_HOTPLUG_MONITOR_COLOR)
 163                 return true;
 164
 165         return false;
 166 }
 167
 168 static bool intel_crt_detect_ddc(struct drm_connector *connector)
 169 {
 170         struct intel_output *intel_output = to_intel_output(connector);
 171
 172         /* CRT should always be at 0, but check anyway */
 173         if (intel_output->type != INTEL_OUTPUT_ANALOG)
 174                 return false;
 175
 176         return intel_ddc_probe(intel_output);
 177 }
 178
 179 static enum drm_connector_status intel_crt_detect(struct drm_connector *connector)
 180 {
 181         struct drm_device *dev = connector->dev;
 182
 183         if (IS_I9XX(dev) && !IS_I915G(dev) && !IS_I915GM(dev)) {
 184                 if (intel_crt_detect_hotplug(connector))
 185                         return connector_status_connected;
 186                 else
 187                         return connector_status_disconnected;
 188         }
 189
 190         if (intel_crt_detect_ddc(connector))
 191                 return connector_status_connected;
 192
 193         /* TODO use load detect */
 194         return connector_status_unknown;
 195 }
 196
 197 static void intel_crt_destroy(struct drm_connector *connector)
 198 {
 199         struct intel_output *intel_output = to_intel_output(connector);
 200
 201         intel_i2c_destroy(intel_output->ddc_bus);
 202         drm_sysfs_connector_remove(connector);
 203         drm_connector_cleanup(connector);
 204         kfree(connector);
 205 }
 206
 207 static int intel_crt_get_modes(struct drm_connector *connector)
 208 {
 209         struct intel_output *intel_output = to_intel_output(connector);
 210         return intel_ddc_get_modes(intel_output);
 211 }
 212
 213 static bool intel_crt_set_property(struct drm_connector *connector,
 214                                   struct drm_property *property,
 215                                   uint64_t value)
 216 {
 217         struct drm_device *dev = connector->dev;
 218
 219         if (property == dev->mode_config.dpms_property && connector->encoder)
 220                 intel_crt_dpms(connector->encoder, (uint32_t)(value & 0xf));
 221
 222         return true;
 223 }
 224
 225 /*
 226  * Routines for controlling stuff on the analog port
 227  */
 228
 229 static const struct drm_encoder_helper_funcs intel_crt_helper_funcs = {
 230         .dpms = intel_crt_dpms,
 231         .mode_fixup = intel_crt_mode_fixup,
 232         .prepare = intel_encoder_prepare,
 233         .commit = intel_encoder_commit,
 234         .mode_set = intel_crt_mode_set,
 235 };
 236
 237 static const struct drm_connector_funcs intel_crt_connector_funcs = {
 238         .save = intel_crt_save,
 239         .restore = intel_crt_restore,
 240         .detect = intel_crt_detect,
 241         .fill_modes = drm_helper_probe_single_connector_modes,
 242         .destroy = intel_crt_destroy,
 243         .set_property = intel_crt_set_property,
 244 };
 245
 246 static const struct drm_connector_helper_funcs intel_crt_connector_helper_funcs = {
 247         .mode_valid = intel_crt_mode_valid,
 248         .get_modes = intel_crt_get_modes,
 249         .best_encoder = intel_best_encoder,
 250 };
 251
 252 void intel_crt_enc_destroy(struct drm_encoder *encoder)
 253 {
 254         drm_encoder_cleanup(encoder);
 255 }
 256
 257 static const struct drm_encoder_funcs intel_crt_enc_funcs = {
 258         .destroy = intel_crt_enc_destroy,
 259 };
 260
 261 void intel_crt_init(struct drm_device *dev)
 262 {
 263         struct drm_connector *connector;
 264         struct intel_output *intel_output;
 265
 266         intel_output = kzalloc(sizeof(struct intel_output), GFP_KERNEL);
 267         if (!intel_output)
 268                 return;
 269
 270         connector = &intel_output->base;
 271         drm_connector_init(dev, &intel_output->base,
 272                            &intel_crt_connector_funcs, DRM_MODE_CONNECTOR_VGA);
 273
 274         drm_encoder_init(dev, &intel_output->enc, &intel_crt_enc_funcs,
 275                          DRM_MODE_ENCODER_DAC);
 276
 277         drm_mode_connector_attach_encoder(&intel_output->base,
 278                                           &intel_output->enc);
 279
 280         /* Set up the DDC bus. */
 281         intel_output->ddc_bus = intel_i2c_create(dev, GPIOA, "CRTDDC_A");
 282         if (!intel_output->ddc_bus) {
 283                 dev_printk(KERN_ERR, &dev->pdev->dev, "DDC bus registration "
 284                            "failed.\n");
 285                 return;
 286         }
 287
 288         intel_output->type = INTEL_OUTPUT_ANALOG;
 289         connector->interlace_allowed = 0;
 290         connector->doublescan_allowed = 0;
 291
 292         drm_encoder_helper_add(&intel_output->enc, &intel_crt_helper_funcs);
 293         drm_connector_helper_add(connector, &intel_crt_connector_helper_funcs);
 294
 295         drm_sysfs_connector_add(connector);
 296 }