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 psb_intel_crtc *psb_intel_crtc =
  99                                         to_psb_intel_crtc(crtc);
 100         int dpll_md_reg;
 101         u32 adpa, dpll_md;
 102         u32 adpa_reg;
 103
 104         if (psb_intel_crtc->pipe == 0)
 105                 dpll_md_reg = DPLL_A_MD;
 106         else
 107                 dpll_md_reg = DPLL_B_MD;
 108
 109         adpa_reg = ADPA;
 110
 111         /*
 112          * Disable separate mode multiplier used when cloning SDVO to CRT
 113          * XXX this needs to be adjusted when we really are cloning
 114          */
 115         {
 116                 dpll_md = REG_READ(dpll_md_reg);
 117                 REG_WRITE(dpll_md_reg,
 118                            dpll_md & ~DPLL_MD_UDI_MULTIPLIER_MASK);
 119         }
 120
 121         adpa = 0;
 122         if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
 123                 adpa |= ADPA_HSYNC_ACTIVE_HIGH;
 124         if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
 125                 adpa |= ADPA_VSYNC_ACTIVE_HIGH;
 126
 127         if (psb_intel_crtc->pipe == 0)
 128                 adpa |= ADPA_PIPE_A_SELECT;
 129         else
 130                 adpa |= ADPA_PIPE_B_SELECT;
 131
 132         REG_WRITE(adpa_reg, adpa);
 133 }
 134
 135
 136 /**
 137  * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect CRT presence.
 138  *
 139  * \return true if CRT is connected.
 140  * \return false if CRT is disconnected.
 141  */
 142 static bool cdv_intel_crt_detect_hotplug(struct drm_connector *connector,
 143                                                                 bool force)
 144 {
 145         struct drm_device *dev = connector->dev;
 146         u32 hotplug_en;
 147         int i, tries = 0, ret = false;
 148         u32 orig;
 149
 150         /*
 151          * On a CDV thep, CRT detect sequence need to be done twice
 152          * to get a reliable result.
 153          */
 154         tries = 2;
 155
 156         orig = hotplug_en = REG_READ(PORT_HOTPLUG_EN);
 157         hotplug_en &= ~(CRT_HOTPLUG_DETECT_MASK);
 158         hotplug_en |= CRT_HOTPLUG_FORCE_DETECT;
 159
 160         hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64;
 161         hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
 162
 163         for (i = 0; i < tries ; i++) {
 164                 unsigned long timeout;
 165                 /* turn on the FORCE_DETECT */
 166                 REG_WRITE(PORT_HOTPLUG_EN, hotplug_en);
 167                 timeout = jiffies + msecs_to_jiffies(1000);
 168                 /* wait for FORCE_DETECT to go off */
 169                 do {
 170                         if (!(REG_READ(PORT_HOTPLUG_EN) &
 171                                         CRT_HOTPLUG_FORCE_DETECT))
 172                                 break;
 173                         msleep(1);
 174                 } while (time_after(timeout, jiffies));
 175         }
 176
 177         if ((REG_READ(PORT_HOTPLUG_STAT) & CRT_HOTPLUG_MONITOR_MASK) !=
 178             CRT_HOTPLUG_MONITOR_NONE)
 179                 ret = true;
 180
 181          /* clear the interrupt we just generated, if any */
 182         REG_WRITE(PORT_HOTPLUG_STAT, CRT_HOTPLUG_INT_STATUS);
 183
 184         /* and put the bits back */
 185         REG_WRITE(PORT_HOTPLUG_EN, orig);
 186         return ret;
 187 }
 188
 189 static enum drm_connector_status cdv_intel_crt_detect(
 190                                 struct drm_connector *connector, bool force)
 191 {
 192         if (cdv_intel_crt_detect_hotplug(connector, force))
 193                 return connector_status_connected;
 194         else
 195                 return connector_status_disconnected;
 196 }
 197
 198 static void cdv_intel_crt_destroy(struct drm_connector *connector)
 199 {
 200         struct psb_intel_encoder *psb_intel_encoder =
 201                                         psb_intel_attached_encoder(connector);
 202
 203         psb_intel_i2c_destroy(psb_intel_encoder->ddc_bus);
 204         drm_sysfs_connector_remove(connector);
 205         drm_connector_cleanup(connector);
 206         kfree(connector);
 207 }
 208
 209 static int cdv_intel_crt_get_modes(struct drm_connector *connector)
 210 {
 211         struct psb_intel_encoder *psb_intel_encoder =
 212                                 psb_intel_attached_encoder(connector);
 213         return psb_intel_ddc_get_modes(connector, &psb_intel_encoder->ddc_bus->adapter);
 214 }
 215
 216 static int cdv_intel_crt_set_property(struct drm_connector *connector,
 217                                   struct drm_property *property,
 218                                   uint64_t value)
 219 {
 220         return 0;
 221 }
 222
 223 /*
 224  * Routines for controlling stuff on the analog port
 225  */
 226
 227 static const struct drm_encoder_helper_funcs cdv_intel_crt_helper_funcs = {
 228         .dpms = cdv_intel_crt_dpms,
 229         .mode_fixup = cdv_intel_crt_mode_fixup,
 230         .prepare = psb_intel_encoder_prepare,
 231         .commit = psb_intel_encoder_commit,
 232         .mode_set = cdv_intel_crt_mode_set,
 233 };
 234
 235 static const struct drm_connector_funcs cdv_intel_crt_connector_funcs = {
 236         .dpms = drm_helper_connector_dpms,
 237         .detect = cdv_intel_crt_detect,
 238         .fill_modes = drm_helper_probe_single_connector_modes,
 239         .destroy = cdv_intel_crt_destroy,
 240         .set_property = cdv_intel_crt_set_property,
 241 };
 242
 243 static const struct drm_connector_helper_funcs
 244                                 cdv_intel_crt_connector_helper_funcs = {
 245         .mode_valid = cdv_intel_crt_mode_valid,
 246         .get_modes = cdv_intel_crt_get_modes,
 247         .best_encoder = psb_intel_best_encoder,
 248 };
 249
 250 static void cdv_intel_crt_enc_destroy(struct drm_encoder *encoder)
 251 {
 252         drm_encoder_cleanup(encoder);
 253 }
 254
 255 static const struct drm_encoder_funcs cdv_intel_crt_enc_funcs = {
 256         .destroy = cdv_intel_crt_enc_destroy,
 257 };
 258
 259 void cdv_intel_crt_init(struct drm_device *dev,
 260                         struct psb_intel_mode_device *mode_dev)
 261 {
 262
 263         struct psb_intel_connector *psb_intel_connector;
 264         struct psb_intel_encoder *psb_intel_encoder;
 265         struct drm_connector *connector;
 266         struct drm_encoder *encoder;
 267
 268         u32 i2c_reg;
 269
 270         psb_intel_encoder = kzalloc(sizeof(struct psb_intel_encoder), GFP_KERNEL);
 271         if (!psb_intel_encoder)
 272                 return;
 273
 274         psb_intel_connector = kzalloc(sizeof(struct psb_intel_connector), GFP_KERNEL);
 275         if (!psb_intel_connector)
 276                 goto failed_connector;
 277
 278         connector = &psb_intel_connector->base;
 279         connector->polled = DRM_CONNECTOR_POLL_HPD;
 280         drm_connector_init(dev, connector,
 281                 &cdv_intel_crt_connector_funcs, DRM_MODE_CONNECTOR_VGA);
 282
 283         encoder = &psb_intel_encoder->base;
 284         drm_encoder_init(dev, encoder,
 285                 &cdv_intel_crt_enc_funcs, DRM_MODE_ENCODER_DAC);
 286
 287         psb_intel_connector_attach_encoder(psb_intel_connector,
 288                                            psb_intel_encoder);
 289
 290         /* Set up the DDC bus. */
 291         i2c_reg = GPIOA;
 292         /* Remove the following code for CDV */
 293         /*
 294         if (dev_priv->crt_ddc_bus != 0)
 295                 i2c_reg = dev_priv->crt_ddc_bus;
 296         }*/
 297         psb_intel_encoder->ddc_bus = psb_intel_i2c_create(dev,
 298                                                           i2c_reg, "CRTDDC_A");
 299         if (!psb_intel_encoder->ddc_bus) {
 300                 dev_printk(KERN_ERR, &dev->pdev->dev, "DDC bus registration "
 301                            "failed.\n");
 302                 goto failed_ddc;
 303         }
 304
 305         psb_intel_encoder->type = INTEL_OUTPUT_ANALOG;
 306         /*
 307         psb_intel_output->clone_mask = (1 << INTEL_ANALOG_CLONE_BIT);
 308         psb_intel_output->crtc_mask = (1 << 0) | (1 << 1);
 309         */
 310         connector->interlace_allowed = 0;
 311         connector->doublescan_allowed = 0;
 312
 313         drm_encoder_helper_add(encoder, &cdv_intel_crt_helper_funcs);
 314         drm_connector_helper_add(connector,
 315                                         &cdv_intel_crt_connector_helper_funcs);
 316
 317         drm_sysfs_connector_add(connector);
 318
 319         return;
 320 failed_ddc:
 321         drm_encoder_cleanup(&psb_intel_encoder->base);
 322         drm_connector_cleanup(&psb_intel_connector->base);
 323         kfree(psb_intel_connector);
 324 failed_connector:
 325         kfree(psb_intel_encoder);
 326         return;
 327 }