drivers/gpu/drm/gma500/cdv_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 <drm/drmP.h>
  29
  30 #include "intel_bios.h"
  31 #include "psb_drv.h"
  32 #include "psb_intel_drv.h"
  33 #include "psb_intel_reg.h"
  34 #include "power.h"
  35 #include "cdv_device.h"
  36 #include <linux/pm_runtime.h>
  37
  38
  39 static void cdv_intel_crt_dpms(struct drm_encoder *encoder, int mode)
  40 {
  41         struct drm_device *dev = encoder->dev;
  42         u32 temp, reg;
  43         reg = ADPA;
  44
  45         temp = REG_READ(reg);
  46         temp &= ~(ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE);
  47         temp &= ~ADPA_DAC_ENABLE;
  48
  49         switch (mode) {
  50         case DRM_MODE_DPMS_ON:
  51                 temp |= ADPA_DAC_ENABLE;
  52                 break;
  53         case DRM_MODE_DPMS_STANDBY:
  54                 temp |= ADPA_DAC_ENABLE | ADPA_HSYNC_CNTL_DISABLE;
  55                 break;
  56         case DRM_MODE_DPMS_SUSPEND:
  57                 temp |= ADPA_DAC_ENABLE | ADPA_VSYNC_CNTL_DISABLE;
  58                 break;
  59         case DRM_MODE_DPMS_OFF:
  60                 temp |= ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE;
  61                 break;
  62         }
  63
  64         REG_WRITE(reg, temp);
  65 }
  66
  67 static int cdv_intel_crt_mode_valid(struct drm_connector *connector,
  68                                 struct drm_display_mode *mode)
  69 {
  70         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
  71                 return MODE_NO_DBLESCAN;
  72
  73         /* The lowest clock for CDV is 20000KHz */
  74         if (mode->clock < 20000)
  75                 return MODE_CLOCK_LOW;
  76
  77         /* The max clock for CDV is 355 instead of 400 */
  78         if (mode->clock > 355000)
  79                 return MODE_CLOCK_HIGH;
  80
  81         return MODE_OK;
  82 }
  83
  84 static bool cdv_intel_crt_mode_fixup(struct drm_encoder *encoder,
  85                                  const struct drm_display_mode *mode,
  86                                  struct drm_display_mode *adjusted_mode)
  87 {
  88         return true;
  89 }
  90
  91 static void cdv_intel_crt_mode_set(struct drm_encoder *encoder,
  92                                struct drm_display_mode *mode,
  93                                struct drm_display_mode *adjusted_mode)
  94 {
  95
  96         struct drm_device *dev = encoder->dev;
  97         struct drm_crtc *crtc = encoder->crtc;
  98         struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
  99         int dpll_md_reg;
 100         u32 adpa, dpll_md;
 101         u32 adpa_reg;
 102
 103         if (gma_crtc->pipe == 0)
 104                 dpll_md_reg = DPLL_A_MD;
 105         else
 106                 dpll_md_reg = DPLL_B_MD;
 107
 108         adpa_reg = ADPA;
 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         {
 115                 dpll_md = REG_READ(dpll_md_reg);
 116                 REG_WRITE(dpll_md_reg,
 117                            dpll_md & ~DPLL_MD_UDI_MULTIPLIER_MASK);
 118         }
 119
 120         adpa = 0;
 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;
 125
 126         if (gma_crtc->pipe == 0)
 127                 adpa |= ADPA_PIPE_A_SELECT;
 128         else
 129                 adpa |= ADPA_PIPE_B_SELECT;
 130
 131         REG_WRITE(adpa_reg, adpa);
 132 }
 133
 134
 135 /**
 136  * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect CRT presence.
 137  *
 138  * \return true if CRT is connected.
 139  * \return false if CRT is disconnected.
 140  */
 141 static bool cdv_intel_crt_detect_hotplug(struct drm_connector *connector,
 142                                                                 bool force)
 143 {
 144         struct drm_device *dev = connector->dev;
 145         u32 hotplug_en;
 146         int i, tries = 0, ret = false;
 147         u32 orig;
 148
 149         /*
 150          * On a CDV thep, CRT detect sequence need to be done twice
 151          * to get a reliable result.
 152          */
 153         tries = 2;
 154
 155         orig = hotplug_en = REG_READ(PORT_HOTPLUG_EN);
 156         hotplug_en &= ~(CRT_HOTPLUG_DETECT_MASK);
 157         hotplug_en |= CRT_HOTPLUG_FORCE_DETECT;
 158
 159         hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64;
 160         hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
 161
 162         for (i = 0; i < tries ; i++) {
 163                 unsigned long timeout;
 164                 /* turn on the FORCE_DETECT */
 165                 REG_WRITE(PORT_HOTPLUG_EN, hotplug_en);
 166                 timeout = jiffies + msecs_to_jiffies(1000);
 167                 /* wait for FORCE_DETECT to go off */
 168                 do {
 169                         if (!(REG_READ(PORT_HOTPLUG_EN) &
 170                                         CRT_HOTPLUG_FORCE_DETECT))
 171                                 break;
 172                         msleep(1);
 173                 } while (time_after(timeout, jiffies));
 174         }
 175
 176         if ((REG_READ(PORT_HOTPLUG_STAT) & CRT_HOTPLUG_MONITOR_MASK) !=
 177             CRT_HOTPLUG_MONITOR_NONE)
 178                 ret = true;
 179
 180          /* clear the interrupt we just generated, if any */
 181         REG_WRITE(PORT_HOTPLUG_STAT, CRT_HOTPLUG_INT_STATUS);
 182
 183         /* and put the bits back */
 184         REG_WRITE(PORT_HOTPLUG_EN, orig);
 185         return ret;
 186 }
 187
 188 static enum drm_connector_status cdv_intel_crt_detect(
 189                                 struct drm_connector *connector, bool force)
 190 {
 191         if (cdv_intel_crt_detect_hotplug(connector, force))
 192                 return connector_status_connected;
 193         else
 194                 return connector_status_disconnected;
 195 }
 196
 197 static void cdv_intel_crt_destroy(struct drm_connector *connector)
 198 {
 199         struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
 200
 201         psb_intel_i2c_destroy(gma_encoder->ddc_bus);
 202         drm_sysfs_connector_remove(connector);
 203         drm_connector_cleanup(connector);
 204         kfree(connector);
 205 }
 206
 207 static int cdv_intel_crt_get_modes(struct drm_connector *connector)
 208 {
 209         struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
 210         return psb_intel_ddc_get_modes(connector,
 211                                        &gma_encoder->ddc_bus->adapter);
 212 }
 213
 214 static int cdv_intel_crt_set_property(struct drm_connector *connector,
 215                                   struct drm_property *property,
 216                                   uint64_t value)
 217 {
 218         return 0;
 219 }
 220
 221 /*
 222  * Routines for controlling stuff on the analog port
 223  */
 224
 225 static const struct drm_encoder_helper_funcs cdv_intel_crt_helper_funcs = {
 226         .dpms = cdv_intel_crt_dpms,
 227         .mode_fixup = cdv_intel_crt_mode_fixup,
 228         .prepare = gma_encoder_prepare,
 229         .commit = gma_encoder_commit,
 230         .mode_set = cdv_intel_crt_mode_set,
 231 };
 232
 233 static const struct drm_connector_funcs cdv_intel_crt_connector_funcs = {
 234         .dpms = drm_helper_connector_dpms,
 235         .detect = cdv_intel_crt_detect,
 236         .fill_modes = drm_helper_probe_single_connector_modes,
 237         .destroy = cdv_intel_crt_destroy,
 238         .set_property = cdv_intel_crt_set_property,
 239 };
 240
 241 static const struct drm_connector_helper_funcs
 242                                 cdv_intel_crt_connector_helper_funcs = {
 243         .mode_valid = cdv_intel_crt_mode_valid,
 244         .get_modes = cdv_intel_crt_get_modes,
 245         .best_encoder = gma_best_encoder,
 246 };
 247
 248 static void cdv_intel_crt_enc_destroy(struct drm_encoder *encoder)
 249 {
 250         drm_encoder_cleanup(encoder);
 251 }
 252
 253 static const struct drm_encoder_funcs cdv_intel_crt_enc_funcs = {
 254         .destroy = cdv_intel_crt_enc_destroy,
 255 };
 256
 257 void cdv_intel_crt_init(struct drm_device *dev,
 258                         struct psb_intel_mode_device *mode_dev)
 259 {
 260
 261         struct gma_connector *gma_connector;
 262         struct gma_encoder *gma_encoder;
 263         struct drm_connector *connector;
 264         struct drm_encoder *encoder;
 265
 266         u32 i2c_reg;
 267
 268         gma_encoder = kzalloc(sizeof(struct gma_encoder), GFP_KERNEL);
 269         if (!gma_encoder)
 270                 return;
 271
 272         gma_connector = kzalloc(sizeof(struct gma_connector), GFP_KERNEL);
 273         if (!gma_connector)
 274                 goto failed_connector;
 275
 276         connector = &gma_connector->base;
 277         connector->polled = DRM_CONNECTOR_POLL_HPD;
 278         drm_connector_init(dev, connector,
 279                 &cdv_intel_crt_connector_funcs, DRM_MODE_CONNECTOR_VGA);
 280
 281         encoder = &gma_encoder->base;
 282         drm_encoder_init(dev, encoder,
 283                 &cdv_intel_crt_enc_funcs, DRM_MODE_ENCODER_DAC);
 284
 285         gma_connector_attach_encoder(gma_connector, gma_encoder);
 286
 287         /* Set up the DDC bus. */
 288         i2c_reg = GPIOA;
 289         /* Remove the following code for CDV */
 290         /*
 291         if (dev_priv->crt_ddc_bus != 0)
 292                 i2c_reg = dev_priv->crt_ddc_bus;
 293         }*/
 294         gma_encoder->ddc_bus = psb_intel_i2c_create(dev,
 295                                                           i2c_reg, "CRTDDC_A");
 296         if (!gma_encoder->ddc_bus) {
 297                 dev_printk(KERN_ERR, &dev->pdev->dev, "DDC bus registration "
 298                            "failed.\n");
 299                 goto failed_ddc;
 300         }
 301
 302         gma_encoder->type = INTEL_OUTPUT_ANALOG;
 303         /*
 304         psb_intel_output->clone_mask = (1 << INTEL_ANALOG_CLONE_BIT);
 305         psb_intel_output->crtc_mask = (1 << 0) | (1 << 1);
 306         */
 307         connector->interlace_allowed = 0;
 308         connector->doublescan_allowed = 0;
 309
 310         drm_encoder_helper_add(encoder, &cdv_intel_crt_helper_funcs);
 311         drm_connector_helper_add(connector,
 312                                         &cdv_intel_crt_connector_helper_funcs);
 313
 314         drm_sysfs_connector_add(connector);
 315
 316         return;
 317 failed_ddc:
 318         drm_encoder_cleanup(&gma_encoder->base);
 319         drm_connector_cleanup(&gma_connector->base);
 320         kfree(gma_connector);
 321 failed_connector:
 322         kfree(gma_encoder);
 323         return;
 324 }