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 enum drm_mode_status 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 void cdv_intel_crt_mode_set(struct drm_encoder *encoder,
  85                                struct drm_display_mode *mode,
  86                                struct drm_display_mode *adjusted_mode)
  87 {
  88
  89         struct drm_device *dev = encoder->dev;
  90         struct drm_crtc *crtc = encoder->crtc;
  91         struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
  92         int dpll_md_reg;
  93         u32 adpa, dpll_md;
  94         u32 adpa_reg;
  95
  96         if (gma_crtc->pipe == 0)
  97                 dpll_md_reg = DPLL_A_MD;
  98         else
  99                 dpll_md_reg = DPLL_B_MD;
 100
 101         adpa_reg = ADPA;
 102
 103         /*
 104          * Disable separate mode multiplier used when cloning SDVO to CRT
 105          * XXX this needs to be adjusted when we really are cloning
 106          */
 107         {
 108                 dpll_md = REG_READ(dpll_md_reg);
 109                 REG_WRITE(dpll_md_reg,
 110                            dpll_md & ~DPLL_MD_UDI_MULTIPLIER_MASK);
 111         }
 112
 113         adpa = 0;
 114         if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
 115                 adpa |= ADPA_HSYNC_ACTIVE_HIGH;
 116         if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
 117                 adpa |= ADPA_VSYNC_ACTIVE_HIGH;
 118
 119         if (gma_crtc->pipe == 0)
 120                 adpa |= ADPA_PIPE_A_SELECT;
 121         else
 122                 adpa |= ADPA_PIPE_B_SELECT;
 123
 124         REG_WRITE(adpa_reg, adpa);
 125 }
 126
 127
 128 /**
 129  * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect CRT presence.
 130  *
 131  * \return true if CRT is connected.
 132  * \return false if CRT is disconnected.
 133  */
 134 static bool cdv_intel_crt_detect_hotplug(struct drm_connector *connector,
 135                                                                 bool force)
 136 {
 137         struct drm_device *dev = connector->dev;
 138         u32 hotplug_en;
 139         int i, tries = 0, ret = false;
 140         u32 orig;
 141
 142         /*
 143          * On a CDV thep, CRT detect sequence need to be done twice
 144          * to get a reliable result.
 145          */
 146         tries = 2;
 147
 148         orig = hotplug_en = REG_READ(PORT_HOTPLUG_EN);
 149         hotplug_en &= ~(CRT_HOTPLUG_DETECT_MASK);
 150         hotplug_en |= CRT_HOTPLUG_FORCE_DETECT;
 151
 152         hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64;
 153         hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
 154
 155         for (i = 0; i < tries ; i++) {
 156                 unsigned long timeout;
 157                 /* turn on the FORCE_DETECT */
 158                 REG_WRITE(PORT_HOTPLUG_EN, hotplug_en);
 159                 timeout = jiffies + msecs_to_jiffies(1000);
 160                 /* wait for FORCE_DETECT to go off */
 161                 do {
 162                         if (!(REG_READ(PORT_HOTPLUG_EN) &
 163                                         CRT_HOTPLUG_FORCE_DETECT))
 164                                 break;
 165                         msleep(1);
 166                 } while (time_after(timeout, jiffies));
 167         }
 168
 169         if ((REG_READ(PORT_HOTPLUG_STAT) & CRT_HOTPLUG_MONITOR_MASK) !=
 170             CRT_HOTPLUG_MONITOR_NONE)
 171                 ret = true;
 172
 173          /* clear the interrupt we just generated, if any */
 174         REG_WRITE(PORT_HOTPLUG_STAT, CRT_HOTPLUG_INT_STATUS);
 175
 176         /* and put the bits back */
 177         REG_WRITE(PORT_HOTPLUG_EN, orig);
 178         return ret;
 179 }
 180
 181 static enum drm_connector_status cdv_intel_crt_detect(
 182                                 struct drm_connector *connector, bool force)
 183 {
 184         if (cdv_intel_crt_detect_hotplug(connector, force))
 185                 return connector_status_connected;
 186         else
 187                 return connector_status_disconnected;
 188 }
 189
 190 static void cdv_intel_crt_destroy(struct drm_connector *connector)
 191 {
 192         struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
 193
 194         psb_intel_i2c_destroy(gma_encoder->ddc_bus);
 195         drm_connector_unregister(connector);
 196         drm_connector_cleanup(connector);
 197         kfree(connector);
 198 }
 199
 200 static int cdv_intel_crt_get_modes(struct drm_connector *connector)
 201 {
 202         struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
 203         return psb_intel_ddc_get_modes(connector,
 204                                        &gma_encoder->ddc_bus->adapter);
 205 }
 206
 207 static int cdv_intel_crt_set_property(struct drm_connector *connector,
 208                                   struct drm_property *property,
 209                                   uint64_t value)
 210 {
 211         return 0;
 212 }
 213
 214 /*
 215  * Routines for controlling stuff on the analog port
 216  */
 217
 218 static const struct drm_encoder_helper_funcs cdv_intel_crt_helper_funcs = {
 219         .dpms = cdv_intel_crt_dpms,
 220         .prepare = gma_encoder_prepare,
 221         .commit = gma_encoder_commit,
 222         .mode_set = cdv_intel_crt_mode_set,
 223 };
 224
 225 static const struct drm_connector_funcs cdv_intel_crt_connector_funcs = {
 226         .dpms = drm_helper_connector_dpms,
 227         .detect = cdv_intel_crt_detect,
 228         .fill_modes = drm_helper_probe_single_connector_modes,
 229         .destroy = cdv_intel_crt_destroy,
 230         .set_property = cdv_intel_crt_set_property,
 231 };
 232
 233 static const struct drm_connector_helper_funcs
 234                                 cdv_intel_crt_connector_helper_funcs = {
 235         .mode_valid = cdv_intel_crt_mode_valid,
 236         .get_modes = cdv_intel_crt_get_modes,
 237         .best_encoder = gma_best_encoder,
 238 };
 239
 240 static void cdv_intel_crt_enc_destroy(struct drm_encoder *encoder)
 241 {
 242         drm_encoder_cleanup(encoder);
 243 }
 244
 245 static const struct drm_encoder_funcs cdv_intel_crt_enc_funcs = {
 246         .destroy = cdv_intel_crt_enc_destroy,
 247 };
 248
 249 void cdv_intel_crt_init(struct drm_device *dev,
 250                         struct psb_intel_mode_device *mode_dev)
 251 {
 252
 253         struct gma_connector *gma_connector;
 254         struct gma_encoder *gma_encoder;
 255         struct drm_connector *connector;
 256         struct drm_encoder *encoder;
 257
 258         u32 i2c_reg;
 259
 260         gma_encoder = kzalloc(sizeof(struct gma_encoder), GFP_KERNEL);
 261         if (!gma_encoder)
 262                 return;
 263
 264         gma_connector = kzalloc(sizeof(struct gma_connector), GFP_KERNEL);
 265         if (!gma_connector)
 266                 goto failed_connector;
 267
 268         connector = &gma_connector->base;
 269         connector->polled = DRM_CONNECTOR_POLL_HPD;
 270         drm_connector_init(dev, connector,
 271                 &cdv_intel_crt_connector_funcs, DRM_MODE_CONNECTOR_VGA);
 272
 273         encoder = &gma_encoder->base;
 274         drm_encoder_init(dev, encoder,
 275                 &cdv_intel_crt_enc_funcs, DRM_MODE_ENCODER_DAC, NULL);
 276
 277         gma_connector_attach_encoder(gma_connector, gma_encoder);
 278
 279         /* Set up the DDC bus. */
 280         i2c_reg = GPIOA;
 281         /* Remove the following code for CDV */
 282         /*
 283         if (dev_priv->crt_ddc_bus != 0)
 284                 i2c_reg = dev_priv->crt_ddc_bus;
 285         }*/
 286         gma_encoder->ddc_bus = psb_intel_i2c_create(dev,
 287                                                           i2c_reg, "CRTDDC_A");
 288         if (!gma_encoder->ddc_bus) {
 289                 dev_printk(KERN_ERR, &dev->pdev->dev, "DDC bus registration "
 290                            "failed.\n");
 291                 goto failed_ddc;
 292         }
 293
 294         gma_encoder->type = INTEL_OUTPUT_ANALOG;
 295         /*
 296         psb_intel_output->clone_mask = (1 << INTEL_ANALOG_CLONE_BIT);
 297         psb_intel_output->crtc_mask = (1 << 0) | (1 << 1);
 298         */
 299         connector->interlace_allowed = 0;
 300         connector->doublescan_allowed = 0;
 301
 302         drm_encoder_helper_add(encoder, &cdv_intel_crt_helper_funcs);
 303         drm_connector_helper_add(connector,
 304                                         &cdv_intel_crt_connector_helper_funcs);
 305
 306         drm_connector_register(connector);
 307
 308         return;
 309 failed_ddc:
 310         drm_encoder_cleanup(&gma_encoder->base);
 311         drm_connector_cleanup(&gma_connector->base);
 312         kfree(gma_connector);
 313 failed_connector:
 314         kfree(gma_encoder);
 315         return;
 316 }