drivers/gpu/drm/i915/gvt/display.c

   1 /*
   2  * Copyright(c) 2011-2016 Intel Corporation. All rights reserved.
   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 FROM,
  20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  21  * SOFTWARE.
  22  *
  23  * Authors:
  24  *    Ke Yu
  25  *    Zhiyuan Lv <zhiyuan.lv@intel.com>
  26  *
  27  * Contributors:
  28  *    Terrence Xu <terrence.xu@intel.com>
  29  *    Changbin Du <changbin.du@intel.com>
  30  *    Bing Niu <bing.niu@intel.com>
  31  *    Zhi Wang <zhi.a.wang@intel.com>
  32  *
  33  */
  34
  35 #include "i915_drv.h"
  36 #include "gvt.h"
  37
  38 static int get_edp_pipe(struct intel_vgpu *vgpu)
  39 {
  40         u32 data = vgpu_vreg(vgpu, _TRANS_DDI_FUNC_CTL_EDP);
  41         int pipe = -1;
  42
  43         switch (data & TRANS_DDI_EDP_INPUT_MASK) {
  44         case TRANS_DDI_EDP_INPUT_A_ON:
  45         case TRANS_DDI_EDP_INPUT_A_ONOFF:
  46                 pipe = PIPE_A;
  47                 break;
  48         case TRANS_DDI_EDP_INPUT_B_ONOFF:
  49                 pipe = PIPE_B;
  50                 break;
  51         case TRANS_DDI_EDP_INPUT_C_ONOFF:
  52                 pipe = PIPE_C;
  53                 break;
  54         }
  55         return pipe;
  56 }
  57
  58 static int edp_pipe_is_enabled(struct intel_vgpu *vgpu)
  59 {
  60         struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
  61
  62         if (!(vgpu_vreg(vgpu, PIPECONF(_PIPE_EDP)) & PIPECONF_ENABLE))
  63                 return 0;
  64
  65         if (!(vgpu_vreg(vgpu, _TRANS_DDI_FUNC_CTL_EDP) & TRANS_DDI_FUNC_ENABLE))
  66                 return 0;
  67         return 1;
  68 }
  69
  70 static int pipe_is_enabled(struct intel_vgpu *vgpu, int pipe)
  71 {
  72         struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
  73
  74         if (WARN_ON(pipe < PIPE_A || pipe >= I915_MAX_PIPES))
  75                 return -EINVAL;
  76
  77         if (vgpu_vreg(vgpu, PIPECONF(pipe)) & PIPECONF_ENABLE)
  78                 return 1;
  79
  80         if (edp_pipe_is_enabled(vgpu) &&
  81                         get_edp_pipe(vgpu) == pipe)
  82                 return 1;
  83         return 0;
  84 }
  85
  86 static unsigned char virtual_dp_monitor_edid[GVT_EDID_NUM][EDID_SIZE] = {
  87         {
  88 /* EDID with 1024x768 as its resolution */
  89                 /*Header*/
  90                 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
  91                 /* Vendor & Product Identification */
  92                 0x22, 0xf0, 0x54, 0x29, 0x00, 0x00, 0x00, 0x00, 0x04, 0x17,
  93                 /* Version & Revision */
  94                 0x01, 0x04,
  95                 /* Basic Display Parameters & Features */
  96                 0xa5, 0x34, 0x20, 0x78, 0x23,
  97                 /* Color Characteristics */
  98                 0xfc, 0x81, 0xa4, 0x55, 0x4d, 0x9d, 0x25, 0x12, 0x50, 0x54,
  99                 /* Established Timings: maximum resolution is 1024x768 */
 100                 0x21, 0x08, 0x00,
 101                 /* Standard Timings. All invalid */
 102                 0x00, 0xc0, 0x00, 0xc0, 0x00, 0x40, 0x00, 0x80, 0x00, 0x00,
 103                 0x00, 0x40, 0x00, 0x00, 0x00, 0x01,
 104                 /* 18 Byte Data Blocks 1: invalid */
 105                 0x00, 0x00, 0x80, 0xa0, 0x70, 0xb0,
 106                 0x23, 0x40, 0x30, 0x20, 0x36, 0x00, 0x06, 0x44, 0x21, 0x00, 0x00, 0x1a,
 107                 /* 18 Byte Data Blocks 2: invalid */
 108                 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18, 0x3c, 0x18, 0x50, 0x11, 0x00, 0x0a,
 109                 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
 110                 /* 18 Byte Data Blocks 3: invalid */
 111                 0x00, 0x00, 0x00, 0xfc, 0x00, 0x48,
 112                 0x50, 0x20, 0x5a, 0x52, 0x32, 0x34, 0x34, 0x30, 0x77, 0x0a, 0x20, 0x20,
 113                 /* 18 Byte Data Blocks 4: invalid */
 114                 0x00, 0x00, 0x00, 0xff, 0x00, 0x43, 0x4e, 0x34, 0x33, 0x30, 0x34, 0x30,
 115                 0x44, 0x58, 0x51, 0x0a, 0x20, 0x20,
 116                 /* Extension Block Count */
 117                 0x00,
 118                 /* Checksum */
 119                 0xef,
 120         },
 121         {
 122 /* EDID with 1920x1200 as its resolution */
 123                 /*Header*/
 124                 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
 125                 /* Vendor & Product Identification */
 126                 0x22, 0xf0, 0x54, 0x29, 0x00, 0x00, 0x00, 0x00, 0x04, 0x17,
 127                 /* Version & Revision */
 128                 0x01, 0x04,
 129                 /* Basic Display Parameters & Features */
 130                 0xa5, 0x34, 0x20, 0x78, 0x23,
 131                 /* Color Characteristics */
 132                 0xfc, 0x81, 0xa4, 0x55, 0x4d, 0x9d, 0x25, 0x12, 0x50, 0x54,
 133                 /* Established Timings: maximum resolution is 1024x768 */
 134                 0x21, 0x08, 0x00,
 135                 /*
 136                  * Standard Timings.
 137                  * below new resolutions can be supported:
 138                  * 1920x1080, 1280x720, 1280x960, 1280x1024,
 139                  * 1440x900, 1600x1200, 1680x1050
 140                  */
 141                 0xd1, 0xc0, 0x81, 0xc0, 0x81, 0x40, 0x81, 0x80, 0x95, 0x00,
 142                 0xa9, 0x40, 0xb3, 0x00, 0x01, 0x01,
 143                 /* 18 Byte Data Blocks 1: max resolution is 1920x1200 */
 144                 0x28, 0x3c, 0x80, 0xa0, 0x70, 0xb0,
 145                 0x23, 0x40, 0x30, 0x20, 0x36, 0x00, 0x06, 0x44, 0x21, 0x00, 0x00, 0x1a,
 146                 /* 18 Byte Data Blocks 2: invalid */
 147                 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18, 0x3c, 0x18, 0x50, 0x11, 0x00, 0x0a,
 148                 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
 149                 /* 18 Byte Data Blocks 3: invalid */
 150                 0x00, 0x00, 0x00, 0xfc, 0x00, 0x48,
 151                 0x50, 0x20, 0x5a, 0x52, 0x32, 0x34, 0x34, 0x30, 0x77, 0x0a, 0x20, 0x20,
 152                 /* 18 Byte Data Blocks 4: invalid */
 153                 0x00, 0x00, 0x00, 0xff, 0x00, 0x43, 0x4e, 0x34, 0x33, 0x30, 0x34, 0x30,
 154                 0x44, 0x58, 0x51, 0x0a, 0x20, 0x20,
 155                 /* Extension Block Count */
 156                 0x00,
 157                 /* Checksum */
 158                 0x45,
 159         },
 160 };
 161
 162 #define DPCD_HEADER_SIZE        0xb
 163
 164 static u8 dpcd_fix_data[DPCD_HEADER_SIZE] = {
 165         0x11, 0x0a, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
 166 };
 167
 168 static void emulate_monitor_status_change(struct intel_vgpu *vgpu)
 169 {
 170         struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
 171         vgpu_vreg(vgpu, SDEISR) &= ~(SDE_PORTB_HOTPLUG_CPT |
 172                         SDE_PORTC_HOTPLUG_CPT |
 173                         SDE_PORTD_HOTPLUG_CPT);
 174
 175         if (IS_SKYLAKE(dev_priv))
 176                 vgpu_vreg(vgpu, SDEISR) &= ~(SDE_PORTA_HOTPLUG_SPT |
 177                                 SDE_PORTE_HOTPLUG_SPT);
 178
 179         if (intel_vgpu_has_monitor_on_port(vgpu, PORT_B))
 180                 vgpu_vreg(vgpu, SDEISR) |= SDE_PORTB_HOTPLUG_CPT;
 181
 182         if (intel_vgpu_has_monitor_on_port(vgpu, PORT_C))
 183                 vgpu_vreg(vgpu, SDEISR) |= SDE_PORTC_HOTPLUG_CPT;
 184
 185         if (intel_vgpu_has_monitor_on_port(vgpu, PORT_D))
 186                 vgpu_vreg(vgpu, SDEISR) |= SDE_PORTD_HOTPLUG_CPT;
 187
 188         if (IS_SKYLAKE(dev_priv) &&
 189                         intel_vgpu_has_monitor_on_port(vgpu, PORT_E)) {
 190                 vgpu_vreg(vgpu, SDEISR) |= SDE_PORTE_HOTPLUG_SPT;
 191         }
 192
 193         if (intel_vgpu_has_monitor_on_port(vgpu, PORT_A)) {
 194                 if (IS_BROADWELL(dev_priv))
 195                         vgpu_vreg(vgpu, GEN8_DE_PORT_ISR) |=
 196                                 GEN8_PORT_DP_A_HOTPLUG;
 197                 else
 198                         vgpu_vreg(vgpu, SDEISR) |= SDE_PORTA_HOTPLUG_SPT;
 199         }
 200 }
 201
 202 static void clean_virtual_dp_monitor(struct intel_vgpu *vgpu, int port_num)
 203 {
 204         struct intel_vgpu_port *port = intel_vgpu_port(vgpu, port_num);
 205
 206         kfree(port->edid);
 207         port->edid = NULL;
 208
 209         kfree(port->dpcd);
 210         port->dpcd = NULL;
 211 }
 212
 213 static int setup_virtual_dp_monitor(struct intel_vgpu *vgpu, int port_num,
 214                                     int type, unsigned int resolution)
 215 {
 216         struct intel_vgpu_port *port = intel_vgpu_port(vgpu, port_num);
 217
 218         if (WARN_ON(resolution >= GVT_EDID_NUM))
 219                 return -EINVAL;
 220
 221         port->edid = kzalloc(sizeof(*(port->edid)), GFP_KERNEL);
 222         if (!port->edid)
 223                 return -ENOMEM;
 224
 225         port->dpcd = kzalloc(sizeof(*(port->dpcd)), GFP_KERNEL);
 226         if (!port->dpcd) {
 227                 kfree(port->edid);
 228                 return -ENOMEM;
 229         }
 230
 231         memcpy(port->edid->edid_block, virtual_dp_monitor_edid[resolution],
 232                         EDID_SIZE);
 233         port->edid->data_valid = true;
 234
 235         memcpy(port->dpcd->data, dpcd_fix_data, DPCD_HEADER_SIZE);
 236         port->dpcd->data_valid = true;
 237         port->dpcd->data[DPCD_SINK_COUNT] = 0x1;
 238         port->type = type;
 239
 240         emulate_monitor_status_change(vgpu);
 241         return 0;
 242 }
 243
 244 /**
 245  * intel_gvt_check_vblank_emulation - check if vblank emulation timer should
 246  * be turned on/off when a virtual pipe is enabled/disabled.
 247  * @gvt: a GVT device
 248  *
 249  * This function is used to turn on/off vblank timer according to currently
 250  * enabled/disabled virtual pipes.
 251  *
 252  */
 253 void intel_gvt_check_vblank_emulation(struct intel_gvt *gvt)
 254 {
 255         struct intel_gvt_irq *irq = &gvt->irq;
 256         struct intel_vgpu *vgpu;
 257         bool have_enabled_pipe = false;
 258         int pipe, id;
 259
 260         if (WARN_ON(!mutex_is_locked(&gvt->lock)))
 261                 return;
 262
 263         hrtimer_cancel(&irq->vblank_timer.timer);
 264
 265         for_each_active_vgpu(gvt, vgpu, id) {
 266                 for (pipe = 0; pipe < I915_MAX_PIPES; pipe++) {
 267                         have_enabled_pipe =
 268                                 pipe_is_enabled(vgpu, pipe);
 269                         if (have_enabled_pipe)
 270                                 break;
 271                 }
 272         }
 273
 274         if (have_enabled_pipe)
 275                 hrtimer_start(&irq->vblank_timer.timer,
 276                         ktime_add_ns(ktime_get(), irq->vblank_timer.period),
 277                         HRTIMER_MODE_ABS);
 278 }
 279
 280 static void emulate_vblank_on_pipe(struct intel_vgpu *vgpu, int pipe)
 281 {
 282         struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
 283         struct intel_vgpu_irq *irq = &vgpu->irq;
 284         int vblank_event[] = {
 285                 [PIPE_A] = PIPE_A_VBLANK,
 286                 [PIPE_B] = PIPE_B_VBLANK,
 287                 [PIPE_C] = PIPE_C_VBLANK,
 288         };
 289         int event;
 290
 291         if (pipe < PIPE_A || pipe > PIPE_C)
 292                 return;
 293
 294         for_each_set_bit(event, irq->flip_done_event[pipe],
 295                         INTEL_GVT_EVENT_MAX) {
 296                 clear_bit(event, irq->flip_done_event[pipe]);
 297                 if (!pipe_is_enabled(vgpu, pipe))
 298                         continue;
 299
 300                 vgpu_vreg(vgpu, PIPE_FLIPCOUNT_G4X(pipe))++;
 301                 intel_vgpu_trigger_virtual_event(vgpu, event);
 302         }
 303
 304         if (pipe_is_enabled(vgpu, pipe)) {
 305                 vgpu_vreg(vgpu, PIPE_FRMCOUNT_G4X(pipe))++;
 306                 intel_vgpu_trigger_virtual_event(vgpu, vblank_event[pipe]);
 307         }
 308 }
 309
 310 static void emulate_vblank(struct intel_vgpu *vgpu)
 311 {
 312         int pipe;
 313
 314         for_each_pipe(vgpu->gvt->dev_priv, pipe)
 315                 emulate_vblank_on_pipe(vgpu, pipe);
 316 }
 317
 318 /**
 319  * intel_gvt_emulate_vblank - trigger vblank events for vGPUs on GVT device
 320  * @gvt: a GVT device
 321  *
 322  * This function is used to trigger vblank interrupts for vGPUs on GVT device
 323  *
 324  */
 325 void intel_gvt_emulate_vblank(struct intel_gvt *gvt)
 326 {
 327         struct intel_vgpu *vgpu;
 328         int id;
 329
 330         if (WARN_ON(!mutex_is_locked(&gvt->lock)))
 331                 return;
 332
 333         for_each_active_vgpu(gvt, vgpu, id)
 334                 emulate_vblank(vgpu);
 335 }
 336
 337 /**
 338  * intel_vgpu_clean_display - clean vGPU virtual display emulation
 339  * @vgpu: a vGPU
 340  *
 341  * This function is used to clean vGPU virtual display emulation stuffs
 342  *
 343  */
 344 void intel_vgpu_clean_display(struct intel_vgpu *vgpu)
 345 {
 346         struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
 347
 348         if (IS_SKYLAKE(dev_priv))
 349                 clean_virtual_dp_monitor(vgpu, PORT_D);
 350         else
 351                 clean_virtual_dp_monitor(vgpu, PORT_B);
 352 }
 353
 354 /**
 355  * intel_vgpu_init_display- initialize vGPU virtual display emulation
 356  * @vgpu: a vGPU
 357  *
 358  * This function is used to initialize vGPU virtual display emulation stuffs
 359  *
 360  * Returns:
 361  * Zero on success, negative error code if failed.
 362  *
 363  */
 364 int intel_vgpu_init_display(struct intel_vgpu *vgpu, u64 resolution)
 365 {
 366         struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
 367
 368         intel_vgpu_init_i2c_edid(vgpu);
 369
 370         if (IS_SKYLAKE(dev_priv))
 371                 return setup_virtual_dp_monitor(vgpu, PORT_D, GVT_DP_D,
 372                                                 resolution);
 373         else
 374                 return setup_virtual_dp_monitor(vgpu, PORT_B, GVT_DP_B,
 375                                                 resolution);
 376 }
 377
 378 /**
 379  * intel_vgpu_reset_display- reset vGPU virtual display emulation
 380  * @vgpu: a vGPU
 381  *
 382  * This function is used to reset vGPU virtual display emulation stuffs
 383  *
 384  */
 385 void intel_vgpu_reset_display(struct intel_vgpu *vgpu)
 386 {
 387         emulate_monitor_status_change(vgpu);
 388 }