1 /* i915_drv.c -- i830,i845,i855,i865,i915 driver -*- linux-c -*-
5 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the
10 * "Software"), to deal in the Software without restriction, including
11 * without limitation the rights to use, copy, modify, merge, publish,
12 * distribute, sub license, and/or sell copies of the Software, and to
13 * permit persons to whom the Software is furnished to do so, subject to
14 * the following conditions:
16 * The above copyright notice and this permission notice (including the
17 * next paragraph) shall be included in all copies or substantial portions
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
21 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
23 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
24 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
25 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
26 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
30 #include <linux/device.h>
32 #include <drm/i915_drm.h>
34 #include "i915_trace.h"
35 #include "intel_drv.h"
37 #include <linux/console.h>
38 #include <linux/module.h>
39 #include <drm/drm_crtc_helper.h>
41 static int i915_modeset __read_mostly
= -1;
42 module_param_named(modeset
, i915_modeset
, int, 0400);
43 MODULE_PARM_DESC(modeset
,
44 "Use kernel modesetting [KMS] (0=DRM_I915_KMS from .config, "
45 "1=on, -1=force vga console preference [default])");
47 unsigned int i915_fbpercrtc __always_unused
= 0;
48 module_param_named(fbpercrtc
, i915_fbpercrtc
, int, 0400);
50 int i915_panel_ignore_lid __read_mostly
= 1;
51 module_param_named(panel_ignore_lid
, i915_panel_ignore_lid
, int, 0600);
52 MODULE_PARM_DESC(panel_ignore_lid
,
53 "Override lid status (0=autodetect, 1=autodetect disabled [default], "
54 "-1=force lid closed, -2=force lid open)");
56 unsigned int i915_powersave __read_mostly
= 1;
57 module_param_named(powersave
, i915_powersave
, int, 0600);
58 MODULE_PARM_DESC(powersave
,
59 "Enable powersavings, fbc, downclocking, etc. (default: true)");
61 int i915_semaphores __read_mostly
= -1;
62 module_param_named(semaphores
, i915_semaphores
, int, 0600);
63 MODULE_PARM_DESC(semaphores
,
64 "Use semaphores for inter-ring sync (default: -1 (use per-chip defaults))");
66 int i915_enable_rc6 __read_mostly
= -1;
67 module_param_named(i915_enable_rc6
, i915_enable_rc6
, int, 0400);
68 MODULE_PARM_DESC(i915_enable_rc6
,
69 "Enable power-saving render C-state 6. "
70 "Different stages can be selected via bitmask values "
71 "(0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). "
72 "For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. "
73 "default: -1 (use per-chip default)");
75 int i915_enable_fbc __read_mostly
= -1;
76 module_param_named(i915_enable_fbc
, i915_enable_fbc
, int, 0600);
77 MODULE_PARM_DESC(i915_enable_fbc
,
78 "Enable frame buffer compression for power savings "
79 "(default: -1 (use per-chip default))");
81 unsigned int i915_lvds_downclock __read_mostly
= 0;
82 module_param_named(lvds_downclock
, i915_lvds_downclock
, int, 0400);
83 MODULE_PARM_DESC(lvds_downclock
,
84 "Use panel (LVDS/eDP) downclocking for power savings "
87 int i915_lvds_channel_mode __read_mostly
;
88 module_param_named(lvds_channel_mode
, i915_lvds_channel_mode
, int, 0600);
89 MODULE_PARM_DESC(lvds_channel_mode
,
90 "Specify LVDS channel mode "
91 "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");
93 int i915_panel_use_ssc __read_mostly
= -1;
94 module_param_named(lvds_use_ssc
, i915_panel_use_ssc
, int, 0600);
95 MODULE_PARM_DESC(lvds_use_ssc
,
96 "Use Spread Spectrum Clock with panels [LVDS/eDP] "
97 "(default: auto from VBT)");
99 int i915_vbt_sdvo_panel_type __read_mostly
= -1;
100 module_param_named(vbt_sdvo_panel_type
, i915_vbt_sdvo_panel_type
, int, 0600);
101 MODULE_PARM_DESC(vbt_sdvo_panel_type
,
102 "Override/Ignore selection of SDVO panel mode in the VBT "
103 "(-2=ignore, -1=auto [default], index in VBT BIOS table)");
105 static bool i915_try_reset __read_mostly
= true;
106 module_param_named(reset
, i915_try_reset
, bool, 0600);
107 MODULE_PARM_DESC(reset
, "Attempt GPU resets (default: true)");
109 bool i915_enable_hangcheck __read_mostly
= true;
110 module_param_named(enable_hangcheck
, i915_enable_hangcheck
, bool, 0644);
111 MODULE_PARM_DESC(enable_hangcheck
,
112 "Periodically check GPU activity for detecting hangs. "
113 "WARNING: Disabling this can cause system wide hangs. "
116 int i915_enable_ppgtt __read_mostly
= -1;
117 module_param_named(i915_enable_ppgtt
, i915_enable_ppgtt
, int, 0600);
118 MODULE_PARM_DESC(i915_enable_ppgtt
,
119 "Enable PPGTT (default: true)");
121 unsigned int i915_preliminary_hw_support __read_mostly
= 0;
122 module_param_named(preliminary_hw_support
, i915_preliminary_hw_support
, int, 0600);
123 MODULE_PARM_DESC(preliminary_hw_support
,
124 "Enable preliminary hardware support. (default: false)");
126 static struct drm_driver driver
;
127 extern int intel_agp_enabled
;
129 #define INTEL_VGA_DEVICE(id, info) { \
130 .class = PCI_BASE_CLASS_DISPLAY << 16, \
131 .class_mask = 0xff0000, \
134 .subvendor = PCI_ANY_ID, \
135 .subdevice = PCI_ANY_ID, \
136 .driver_data = (unsigned long) info }
138 static const struct intel_device_info intel_i830_info
= {
139 .gen
= 2, .is_mobile
= 1, .cursor_needs_physical
= 1, .num_pipes
= 2,
140 .has_overlay
= 1, .overlay_needs_physical
= 1,
143 static const struct intel_device_info intel_845g_info
= {
144 .gen
= 2, .num_pipes
= 1,
145 .has_overlay
= 1, .overlay_needs_physical
= 1,
148 static const struct intel_device_info intel_i85x_info
= {
149 .gen
= 2, .is_i85x
= 1, .is_mobile
= 1, .num_pipes
= 2,
150 .cursor_needs_physical
= 1,
151 .has_overlay
= 1, .overlay_needs_physical
= 1,
154 static const struct intel_device_info intel_i865g_info
= {
155 .gen
= 2, .num_pipes
= 1,
156 .has_overlay
= 1, .overlay_needs_physical
= 1,
159 static const struct intel_device_info intel_i915g_info
= {
160 .gen
= 3, .is_i915g
= 1, .cursor_needs_physical
= 1, .num_pipes
= 2,
161 .has_overlay
= 1, .overlay_needs_physical
= 1,
163 static const struct intel_device_info intel_i915gm_info
= {
164 .gen
= 3, .is_mobile
= 1, .num_pipes
= 2,
165 .cursor_needs_physical
= 1,
166 .has_overlay
= 1, .overlay_needs_physical
= 1,
169 static const struct intel_device_info intel_i945g_info
= {
170 .gen
= 3, .has_hotplug
= 1, .cursor_needs_physical
= 1, .num_pipes
= 2,
171 .has_overlay
= 1, .overlay_needs_physical
= 1,
173 static const struct intel_device_info intel_i945gm_info
= {
174 .gen
= 3, .is_i945gm
= 1, .is_mobile
= 1, .num_pipes
= 2,
175 .has_hotplug
= 1, .cursor_needs_physical
= 1,
176 .has_overlay
= 1, .overlay_needs_physical
= 1,
180 static const struct intel_device_info intel_i965g_info
= {
181 .gen
= 4, .is_broadwater
= 1, .num_pipes
= 2,
186 static const struct intel_device_info intel_i965gm_info
= {
187 .gen
= 4, .is_crestline
= 1, .num_pipes
= 2,
188 .is_mobile
= 1, .has_fbc
= 1, .has_hotplug
= 1,
193 static const struct intel_device_info intel_g33_info
= {
194 .gen
= 3, .is_g33
= 1, .num_pipes
= 2,
195 .need_gfx_hws
= 1, .has_hotplug
= 1,
199 static const struct intel_device_info intel_g45_info
= {
200 .gen
= 4, .is_g4x
= 1, .need_gfx_hws
= 1, .num_pipes
= 2,
201 .has_pipe_cxsr
= 1, .has_hotplug
= 1,
205 static const struct intel_device_info intel_gm45_info
= {
206 .gen
= 4, .is_g4x
= 1, .num_pipes
= 2,
207 .is_mobile
= 1, .need_gfx_hws
= 1, .has_fbc
= 1,
208 .has_pipe_cxsr
= 1, .has_hotplug
= 1,
213 static const struct intel_device_info intel_pineview_info
= {
214 .gen
= 3, .is_g33
= 1, .is_pineview
= 1, .is_mobile
= 1, .num_pipes
= 2,
215 .need_gfx_hws
= 1, .has_hotplug
= 1,
219 static const struct intel_device_info intel_ironlake_d_info
= {
220 .gen
= 5, .num_pipes
= 2,
221 .need_gfx_hws
= 1, .has_hotplug
= 1,
225 static const struct intel_device_info intel_ironlake_m_info
= {
226 .gen
= 5, .is_mobile
= 1, .num_pipes
= 2,
227 .need_gfx_hws
= 1, .has_hotplug
= 1,
232 static const struct intel_device_info intel_sandybridge_d_info
= {
233 .gen
= 6, .num_pipes
= 2,
234 .need_gfx_hws
= 1, .has_hotplug
= 1,
241 static const struct intel_device_info intel_sandybridge_m_info
= {
242 .gen
= 6, .is_mobile
= 1, .num_pipes
= 2,
243 .need_gfx_hws
= 1, .has_hotplug
= 1,
251 #define GEN7_FEATURES \
252 .gen = 7, .num_pipes = 3, \
253 .need_gfx_hws = 1, .has_hotplug = 1, \
259 static const struct intel_device_info intel_ivybridge_d_info
= {
264 static const struct intel_device_info intel_ivybridge_m_info
= {
270 static const struct intel_device_info intel_valleyview_m_info
= {
275 .display_mmio_offset
= VLV_DISPLAY_BASE
,
278 static const struct intel_device_info intel_valleyview_d_info
= {
282 .display_mmio_offset
= VLV_DISPLAY_BASE
,
285 static const struct intel_device_info intel_haswell_d_info
= {
290 static const struct intel_device_info intel_haswell_m_info
= {
296 static const struct pci_device_id pciidlist
[] = { /* aka */
297 INTEL_VGA_DEVICE(0x3577, &intel_i830_info
), /* I830_M */
298 INTEL_VGA_DEVICE(0x2562, &intel_845g_info
), /* 845_G */
299 INTEL_VGA_DEVICE(0x3582, &intel_i85x_info
), /* I855_GM */
300 INTEL_VGA_DEVICE(0x358e, &intel_i85x_info
),
301 INTEL_VGA_DEVICE(0x2572, &intel_i865g_info
), /* I865_G */
302 INTEL_VGA_DEVICE(0x2582, &intel_i915g_info
), /* I915_G */
303 INTEL_VGA_DEVICE(0x258a, &intel_i915g_info
), /* E7221_G */
304 INTEL_VGA_DEVICE(0x2592, &intel_i915gm_info
), /* I915_GM */
305 INTEL_VGA_DEVICE(0x2772, &intel_i945g_info
), /* I945_G */
306 INTEL_VGA_DEVICE(0x27a2, &intel_i945gm_info
), /* I945_GM */
307 INTEL_VGA_DEVICE(0x27ae, &intel_i945gm_info
), /* I945_GME */
308 INTEL_VGA_DEVICE(0x2972, &intel_i965g_info
), /* I946_GZ */
309 INTEL_VGA_DEVICE(0x2982, &intel_i965g_info
), /* G35_G */
310 INTEL_VGA_DEVICE(0x2992, &intel_i965g_info
), /* I965_Q */
311 INTEL_VGA_DEVICE(0x29a2, &intel_i965g_info
), /* I965_G */
312 INTEL_VGA_DEVICE(0x29b2, &intel_g33_info
), /* Q35_G */
313 INTEL_VGA_DEVICE(0x29c2, &intel_g33_info
), /* G33_G */
314 INTEL_VGA_DEVICE(0x29d2, &intel_g33_info
), /* Q33_G */
315 INTEL_VGA_DEVICE(0x2a02, &intel_i965gm_info
), /* I965_GM */
316 INTEL_VGA_DEVICE(0x2a12, &intel_i965gm_info
), /* I965_GME */
317 INTEL_VGA_DEVICE(0x2a42, &intel_gm45_info
), /* GM45_G */
318 INTEL_VGA_DEVICE(0x2e02, &intel_g45_info
), /* IGD_E_G */
319 INTEL_VGA_DEVICE(0x2e12, &intel_g45_info
), /* Q45_G */
320 INTEL_VGA_DEVICE(0x2e22, &intel_g45_info
), /* G45_G */
321 INTEL_VGA_DEVICE(0x2e32, &intel_g45_info
), /* G41_G */
322 INTEL_VGA_DEVICE(0x2e42, &intel_g45_info
), /* B43_G */
323 INTEL_VGA_DEVICE(0x2e92, &intel_g45_info
), /* B43_G.1 */
324 INTEL_VGA_DEVICE(0xa001, &intel_pineview_info
),
325 INTEL_VGA_DEVICE(0xa011, &intel_pineview_info
),
326 INTEL_VGA_DEVICE(0x0042, &intel_ironlake_d_info
),
327 INTEL_VGA_DEVICE(0x0046, &intel_ironlake_m_info
),
328 INTEL_VGA_DEVICE(0x0102, &intel_sandybridge_d_info
),
329 INTEL_VGA_DEVICE(0x0112, &intel_sandybridge_d_info
),
330 INTEL_VGA_DEVICE(0x0122, &intel_sandybridge_d_info
),
331 INTEL_VGA_DEVICE(0x0106, &intel_sandybridge_m_info
),
332 INTEL_VGA_DEVICE(0x0116, &intel_sandybridge_m_info
),
333 INTEL_VGA_DEVICE(0x0126, &intel_sandybridge_m_info
),
334 INTEL_VGA_DEVICE(0x010A, &intel_sandybridge_d_info
),
335 INTEL_VGA_DEVICE(0x0156, &intel_ivybridge_m_info
), /* GT1 mobile */
336 INTEL_VGA_DEVICE(0x0166, &intel_ivybridge_m_info
), /* GT2 mobile */
337 INTEL_VGA_DEVICE(0x0152, &intel_ivybridge_d_info
), /* GT1 desktop */
338 INTEL_VGA_DEVICE(0x0162, &intel_ivybridge_d_info
), /* GT2 desktop */
339 INTEL_VGA_DEVICE(0x015a, &intel_ivybridge_d_info
), /* GT1 server */
340 INTEL_VGA_DEVICE(0x016a, &intel_ivybridge_d_info
), /* GT2 server */
341 INTEL_VGA_DEVICE(0x0402, &intel_haswell_d_info
), /* GT1 desktop */
342 INTEL_VGA_DEVICE(0x0412, &intel_haswell_d_info
), /* GT2 desktop */
343 INTEL_VGA_DEVICE(0x0422, &intel_haswell_d_info
), /* GT2 desktop */
344 INTEL_VGA_DEVICE(0x040a, &intel_haswell_d_info
), /* GT1 server */
345 INTEL_VGA_DEVICE(0x041a, &intel_haswell_d_info
), /* GT2 server */
346 INTEL_VGA_DEVICE(0x042a, &intel_haswell_d_info
), /* GT2 server */
347 INTEL_VGA_DEVICE(0x0406, &intel_haswell_m_info
), /* GT1 mobile */
348 INTEL_VGA_DEVICE(0x0416, &intel_haswell_m_info
), /* GT2 mobile */
349 INTEL_VGA_DEVICE(0x0426, &intel_haswell_m_info
), /* GT2 mobile */
350 INTEL_VGA_DEVICE(0x0C02, &intel_haswell_d_info
), /* SDV GT1 desktop */
351 INTEL_VGA_DEVICE(0x0C12, &intel_haswell_d_info
), /* SDV GT2 desktop */
352 INTEL_VGA_DEVICE(0x0C22, &intel_haswell_d_info
), /* SDV GT2 desktop */
353 INTEL_VGA_DEVICE(0x0C0A, &intel_haswell_d_info
), /* SDV GT1 server */
354 INTEL_VGA_DEVICE(0x0C1A, &intel_haswell_d_info
), /* SDV GT2 server */
355 INTEL_VGA_DEVICE(0x0C2A, &intel_haswell_d_info
), /* SDV GT2 server */
356 INTEL_VGA_DEVICE(0x0C06, &intel_haswell_m_info
), /* SDV GT1 mobile */
357 INTEL_VGA_DEVICE(0x0C16, &intel_haswell_m_info
), /* SDV GT2 mobile */
358 INTEL_VGA_DEVICE(0x0C26, &intel_haswell_m_info
), /* SDV GT2 mobile */
359 INTEL_VGA_DEVICE(0x0A02, &intel_haswell_d_info
), /* ULT GT1 desktop */
360 INTEL_VGA_DEVICE(0x0A12, &intel_haswell_d_info
), /* ULT GT2 desktop */
361 INTEL_VGA_DEVICE(0x0A22, &intel_haswell_d_info
), /* ULT GT2 desktop */
362 INTEL_VGA_DEVICE(0x0A0A, &intel_haswell_d_info
), /* ULT GT1 server */
363 INTEL_VGA_DEVICE(0x0A1A, &intel_haswell_d_info
), /* ULT GT2 server */
364 INTEL_VGA_DEVICE(0x0A2A, &intel_haswell_d_info
), /* ULT GT2 server */
365 INTEL_VGA_DEVICE(0x0A06, &intel_haswell_m_info
), /* ULT GT1 mobile */
366 INTEL_VGA_DEVICE(0x0A16, &intel_haswell_m_info
), /* ULT GT2 mobile */
367 INTEL_VGA_DEVICE(0x0A26, &intel_haswell_m_info
), /* ULT GT2 mobile */
368 INTEL_VGA_DEVICE(0x0D02, &intel_haswell_d_info
), /* CRW GT1 desktop */
369 INTEL_VGA_DEVICE(0x0D12, &intel_haswell_d_info
), /* CRW GT2 desktop */
370 INTEL_VGA_DEVICE(0x0D22, &intel_haswell_d_info
), /* CRW GT2 desktop */
371 INTEL_VGA_DEVICE(0x0D0A, &intel_haswell_d_info
), /* CRW GT1 server */
372 INTEL_VGA_DEVICE(0x0D1A, &intel_haswell_d_info
), /* CRW GT2 server */
373 INTEL_VGA_DEVICE(0x0D2A, &intel_haswell_d_info
), /* CRW GT2 server */
374 INTEL_VGA_DEVICE(0x0D06, &intel_haswell_m_info
), /* CRW GT1 mobile */
375 INTEL_VGA_DEVICE(0x0D16, &intel_haswell_m_info
), /* CRW GT2 mobile */
376 INTEL_VGA_DEVICE(0x0D26, &intel_haswell_m_info
), /* CRW GT2 mobile */
377 INTEL_VGA_DEVICE(0x0f30, &intel_valleyview_m_info
),
378 INTEL_VGA_DEVICE(0x0f31, &intel_valleyview_m_info
),
379 INTEL_VGA_DEVICE(0x0f32, &intel_valleyview_m_info
),
380 INTEL_VGA_DEVICE(0x0f33, &intel_valleyview_m_info
),
381 INTEL_VGA_DEVICE(0x0157, &intel_valleyview_m_info
),
382 INTEL_VGA_DEVICE(0x0155, &intel_valleyview_d_info
),
386 #if defined(CONFIG_DRM_I915_KMS)
387 MODULE_DEVICE_TABLE(pci
, pciidlist
);
390 void intel_detect_pch(struct drm_device
*dev
)
392 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
396 * The reason to probe ISA bridge instead of Dev31:Fun0 is to
397 * make graphics device passthrough work easy for VMM, that only
398 * need to expose ISA bridge to let driver know the real hardware
399 * underneath. This is a requirement from virtualization team.
401 pch
= pci_get_class(PCI_CLASS_BRIDGE_ISA
<< 8, NULL
);
403 if (pch
->vendor
== PCI_VENDOR_ID_INTEL
) {
405 id
= pch
->device
& INTEL_PCH_DEVICE_ID_MASK
;
406 dev_priv
->pch_id
= id
;
408 if (id
== INTEL_PCH_IBX_DEVICE_ID_TYPE
) {
409 dev_priv
->pch_type
= PCH_IBX
;
410 dev_priv
->num_pch_pll
= 2;
411 DRM_DEBUG_KMS("Found Ibex Peak PCH\n");
412 WARN_ON(!IS_GEN5(dev
));
413 } else if (id
== INTEL_PCH_CPT_DEVICE_ID_TYPE
) {
414 dev_priv
->pch_type
= PCH_CPT
;
415 dev_priv
->num_pch_pll
= 2;
416 DRM_DEBUG_KMS("Found CougarPoint PCH\n");
417 WARN_ON(!(IS_GEN6(dev
) || IS_IVYBRIDGE(dev
)));
418 } else if (id
== INTEL_PCH_PPT_DEVICE_ID_TYPE
) {
419 /* PantherPoint is CPT compatible */
420 dev_priv
->pch_type
= PCH_CPT
;
421 dev_priv
->num_pch_pll
= 2;
422 DRM_DEBUG_KMS("Found PatherPoint PCH\n");
423 WARN_ON(!(IS_GEN6(dev
) || IS_IVYBRIDGE(dev
)));
424 } else if (id
== INTEL_PCH_LPT_DEVICE_ID_TYPE
) {
425 dev_priv
->pch_type
= PCH_LPT
;
426 dev_priv
->num_pch_pll
= 0;
427 DRM_DEBUG_KMS("Found LynxPoint PCH\n");
428 WARN_ON(!IS_HASWELL(dev
));
429 } else if (id
== INTEL_PCH_LPT_LP_DEVICE_ID_TYPE
) {
430 dev_priv
->pch_type
= PCH_LPT
;
431 dev_priv
->num_pch_pll
= 0;
432 DRM_DEBUG_KMS("Found LynxPoint LP PCH\n");
433 WARN_ON(!IS_HASWELL(dev
));
435 BUG_ON(dev_priv
->num_pch_pll
> I915_NUM_PLLS
);
441 bool i915_semaphore_is_enabled(struct drm_device
*dev
)
443 if (INTEL_INFO(dev
)->gen
< 6)
446 if (i915_semaphores
>= 0)
447 return i915_semaphores
;
449 #ifdef CONFIG_INTEL_IOMMU
450 /* Enable semaphores on SNB when IO remapping is off */
451 if (INTEL_INFO(dev
)->gen
== 6 && intel_iommu_gfx_mapped
)
458 static int i915_drm_freeze(struct drm_device
*dev
)
460 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
461 struct drm_crtc
*crtc
;
463 /* ignore lid events during suspend */
464 mutex_lock(&dev_priv
->modeset_restore_lock
);
465 dev_priv
->modeset_restore
= MODESET_SUSPENDED
;
466 mutex_unlock(&dev_priv
->modeset_restore_lock
);
468 intel_set_power_well(dev
, true);
470 drm_kms_helper_poll_disable(dev
);
472 pci_save_state(dev
->pdev
);
474 /* If KMS is active, we do the leavevt stuff here */
475 if (drm_core_check_feature(dev
, DRIVER_MODESET
)) {
476 int error
= i915_gem_idle(dev
);
478 dev_err(&dev
->pdev
->dev
,
479 "GEM idle failed, resume might fail\n");
483 cancel_delayed_work_sync(&dev_priv
->rps
.delayed_resume_work
);
485 drm_irq_uninstall(dev
);
486 dev_priv
->enable_hotplug_processing
= false;
488 * Disable CRTCs directly since we want to preserve sw state
491 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
)
492 dev_priv
->display
.crtc_disable(crtc
);
495 i915_save_state(dev
);
497 intel_opregion_fini(dev
);
500 intel_fbdev_set_suspend(dev
, 1);
506 int i915_suspend(struct drm_device
*dev
, pm_message_t state
)
510 if (!dev
|| !dev
->dev_private
) {
511 DRM_ERROR("dev: %p\n", dev
);
512 DRM_ERROR("DRM not initialized, aborting suspend.\n");
516 if (state
.event
== PM_EVENT_PRETHAW
)
520 if (dev
->switch_power_state
== DRM_SWITCH_POWER_OFF
)
523 error
= i915_drm_freeze(dev
);
527 if (state
.event
== PM_EVENT_SUSPEND
) {
528 /* Shut down the device */
529 pci_disable_device(dev
->pdev
);
530 pci_set_power_state(dev
->pdev
, PCI_D3hot
);
536 void intel_console_resume(struct work_struct
*work
)
538 struct drm_i915_private
*dev_priv
=
539 container_of(work
, struct drm_i915_private
,
540 console_resume_work
);
541 struct drm_device
*dev
= dev_priv
->dev
;
544 intel_fbdev_set_suspend(dev
, 0);
548 static void intel_resume_hotplug(struct drm_device
*dev
)
550 struct drm_mode_config
*mode_config
= &dev
->mode_config
;
551 struct intel_encoder
*encoder
;
553 mutex_lock(&mode_config
->mutex
);
554 DRM_DEBUG_KMS("running encoder hotplug functions\n");
556 list_for_each_entry(encoder
, &mode_config
->encoder_list
, base
.head
)
557 if (encoder
->hot_plug
)
558 encoder
->hot_plug(encoder
);
560 mutex_unlock(&mode_config
->mutex
);
562 /* Just fire off a uevent and let userspace tell us what to do */
563 drm_helper_hpd_irq_event(dev
);
566 static int __i915_drm_thaw(struct drm_device
*dev
)
568 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
571 i915_restore_state(dev
);
572 intel_opregion_setup(dev
);
574 /* KMS EnterVT equivalent */
575 if (drm_core_check_feature(dev
, DRIVER_MODESET
)) {
576 intel_init_pch_refclk(dev
);
578 mutex_lock(&dev
->struct_mutex
);
579 dev_priv
->mm
.suspended
= 0;
581 error
= i915_gem_init_hw(dev
);
582 mutex_unlock(&dev
->struct_mutex
);
584 /* We need working interrupts for modeset enabling ... */
585 drm_irq_install(dev
);
587 intel_modeset_init_hw(dev
);
589 drm_modeset_lock_all(dev
);
590 intel_modeset_setup_hw_state(dev
, true);
591 drm_modeset_unlock_all(dev
);
594 * ... but also need to make sure that hotplug processing
595 * doesn't cause havoc. Like in the driver load code we don't
596 * bother with the tiny race here where we might loose hotplug
600 dev_priv
->enable_hotplug_processing
= true;
601 /* Config may have changed between suspend and resume */
602 intel_resume_hotplug(dev
);
605 intel_opregion_init(dev
);
608 * The console lock can be pretty contented on resume due
609 * to all the printk activity. Try to keep it out of the hot
610 * path of resume if possible.
612 if (console_trylock()) {
613 intel_fbdev_set_suspend(dev
, 0);
616 schedule_work(&dev_priv
->console_resume_work
);
619 mutex_lock(&dev_priv
->modeset_restore_lock
);
620 dev_priv
->modeset_restore
= MODESET_DONE
;
621 mutex_unlock(&dev_priv
->modeset_restore_lock
);
625 static int i915_drm_thaw(struct drm_device
*dev
)
631 if (drm_core_check_feature(dev
, DRIVER_MODESET
)) {
632 mutex_lock(&dev
->struct_mutex
);
633 i915_gem_restore_gtt_mappings(dev
);
634 mutex_unlock(&dev
->struct_mutex
);
637 __i915_drm_thaw(dev
);
642 int i915_resume(struct drm_device
*dev
)
644 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
647 if (dev
->switch_power_state
== DRM_SWITCH_POWER_OFF
)
650 if (pci_enable_device(dev
->pdev
))
653 pci_set_master(dev
->pdev
);
658 * Platforms with opregion should have sane BIOS, older ones (gen3 and
659 * earlier) need this since the BIOS might clear all our scratch PTEs.
661 if (drm_core_check_feature(dev
, DRIVER_MODESET
) &&
662 !dev_priv
->opregion
.header
) {
663 mutex_lock(&dev
->struct_mutex
);
664 i915_gem_restore_gtt_mappings(dev
);
665 mutex_unlock(&dev
->struct_mutex
);
668 ret
= __i915_drm_thaw(dev
);
672 drm_kms_helper_poll_enable(dev
);
676 static int i8xx_do_reset(struct drm_device
*dev
)
678 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
683 I915_WRITE(D_STATE
, I915_READ(D_STATE
) | DSTATE_GFX_RESET_I830
);
684 POSTING_READ(D_STATE
);
686 if (IS_I830(dev
) || IS_845G(dev
)) {
687 I915_WRITE(DEBUG_RESET_I830
,
688 DEBUG_RESET_DISPLAY
|
691 POSTING_READ(DEBUG_RESET_I830
);
694 I915_WRITE(DEBUG_RESET_I830
, 0);
695 POSTING_READ(DEBUG_RESET_I830
);
700 I915_WRITE(D_STATE
, I915_READ(D_STATE
) & ~DSTATE_GFX_RESET_I830
);
701 POSTING_READ(D_STATE
);
706 static int i965_reset_complete(struct drm_device
*dev
)
709 pci_read_config_byte(dev
->pdev
, I965_GDRST
, &gdrst
);
710 return (gdrst
& GRDOM_RESET_ENABLE
) == 0;
713 static int i965_do_reset(struct drm_device
*dev
)
719 * Set the domains we want to reset (GRDOM/bits 2 and 3) as
720 * well as the reset bit (GR/bit 0). Setting the GR bit
721 * triggers the reset; when done, the hardware will clear it.
723 pci_read_config_byte(dev
->pdev
, I965_GDRST
, &gdrst
);
724 pci_write_config_byte(dev
->pdev
, I965_GDRST
,
725 gdrst
| GRDOM_RENDER
|
727 ret
= wait_for(i965_reset_complete(dev
), 500);
731 /* We can't reset render&media without also resetting display ... */
732 pci_read_config_byte(dev
->pdev
, I965_GDRST
, &gdrst
);
733 pci_write_config_byte(dev
->pdev
, I965_GDRST
,
734 gdrst
| GRDOM_MEDIA
|
737 return wait_for(i965_reset_complete(dev
), 500);
740 static int ironlake_do_reset(struct drm_device
*dev
)
742 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
746 gdrst
= I915_READ(MCHBAR_MIRROR_BASE
+ ILK_GDSR
);
747 I915_WRITE(MCHBAR_MIRROR_BASE
+ ILK_GDSR
,
748 gdrst
| GRDOM_RENDER
| GRDOM_RESET_ENABLE
);
749 ret
= wait_for(I915_READ(MCHBAR_MIRROR_BASE
+ ILK_GDSR
) & 0x1, 500);
753 /* We can't reset render&media without also resetting display ... */
754 gdrst
= I915_READ(MCHBAR_MIRROR_BASE
+ ILK_GDSR
);
755 I915_WRITE(MCHBAR_MIRROR_BASE
+ ILK_GDSR
,
756 gdrst
| GRDOM_MEDIA
| GRDOM_RESET_ENABLE
);
757 return wait_for(I915_READ(MCHBAR_MIRROR_BASE
+ ILK_GDSR
) & 0x1, 500);
760 static int gen6_do_reset(struct drm_device
*dev
)
762 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
764 unsigned long irqflags
;
766 /* Hold gt_lock across reset to prevent any register access
767 * with forcewake not set correctly
769 spin_lock_irqsave(&dev_priv
->gt_lock
, irqflags
);
773 /* GEN6_GDRST is not in the gt power well, no need to check
774 * for fifo space for the write or forcewake the chip for
777 I915_WRITE_NOTRACE(GEN6_GDRST
, GEN6_GRDOM_FULL
);
779 /* Spin waiting for the device to ack the reset request */
780 ret
= wait_for((I915_READ_NOTRACE(GEN6_GDRST
) & GEN6_GRDOM_FULL
) == 0, 500);
782 /* If reset with a user forcewake, try to restore, otherwise turn it off */
783 if (dev_priv
->forcewake_count
)
784 dev_priv
->gt
.force_wake_get(dev_priv
);
786 dev_priv
->gt
.force_wake_put(dev_priv
);
788 /* Restore fifo count */
789 dev_priv
->gt_fifo_count
= I915_READ_NOTRACE(GT_FIFO_FREE_ENTRIES
);
791 spin_unlock_irqrestore(&dev_priv
->gt_lock
, irqflags
);
795 int intel_gpu_reset(struct drm_device
*dev
)
797 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
800 switch (INTEL_INFO(dev
)->gen
) {
803 ret
= gen6_do_reset(dev
);
806 ret
= ironlake_do_reset(dev
);
809 ret
= i965_do_reset(dev
);
812 ret
= i8xx_do_reset(dev
);
816 /* Also reset the gpu hangman. */
817 if (dev_priv
->gpu_error
.stop_rings
) {
818 DRM_DEBUG("Simulated gpu hang, resetting stop_rings\n");
819 dev_priv
->gpu_error
.stop_rings
= 0;
820 if (ret
== -ENODEV
) {
821 DRM_ERROR("Reset not implemented, but ignoring "
822 "error for simulated gpu hangs\n");
831 * i915_reset - reset chip after a hang
832 * @dev: drm device to reset
834 * Reset the chip. Useful if a hang is detected. Returns zero on successful
835 * reset or otherwise an error code.
837 * Procedure is fairly simple:
838 * - reset the chip using the reset reg
839 * - re-init context state
840 * - re-init hardware status page
841 * - re-init ring buffer
842 * - re-init interrupt state
845 int i915_reset(struct drm_device
*dev
)
847 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
853 mutex_lock(&dev
->struct_mutex
);
858 if (get_seconds() - dev_priv
->gpu_error
.last_reset
< 5)
859 DRM_ERROR("GPU hanging too fast, declaring wedged!\n");
861 ret
= intel_gpu_reset(dev
);
863 dev_priv
->gpu_error
.last_reset
= get_seconds();
865 DRM_ERROR("Failed to reset chip.\n");
866 mutex_unlock(&dev
->struct_mutex
);
870 /* Ok, now get things going again... */
873 * Everything depends on having the GTT running, so we need to start
874 * there. Fortunately we don't need to do this unless we reset the
875 * chip at a PCI level.
877 * Next we need to restore the context, but we don't use those
880 * Ring buffer needs to be re-initialized in the KMS case, or if X
881 * was running at the time of the reset (i.e. we weren't VT
884 if (drm_core_check_feature(dev
, DRIVER_MODESET
) ||
885 !dev_priv
->mm
.suspended
) {
886 struct intel_ring_buffer
*ring
;
889 dev_priv
->mm
.suspended
= 0;
891 i915_gem_init_swizzling(dev
);
893 for_each_ring(ring
, dev_priv
, i
)
896 i915_gem_context_init(dev
);
897 i915_gem_init_ppgtt(dev
);
900 * It would make sense to re-init all the other hw state, at
901 * least the rps/rc6/emon init done within modeset_init_hw. For
902 * some unknown reason, this blows up my ilk, so don't.
905 mutex_unlock(&dev
->struct_mutex
);
907 drm_irq_uninstall(dev
);
908 drm_irq_install(dev
);
911 mutex_unlock(&dev
->struct_mutex
);
917 static int i915_pci_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
)
919 struct intel_device_info
*intel_info
=
920 (struct intel_device_info
*) ent
->driver_data
;
922 if (intel_info
->is_valleyview
)
923 if(!i915_preliminary_hw_support
) {
924 DRM_ERROR("Preliminary hardware support disabled\n");
928 /* Only bind to function 0 of the device. Early generations
929 * used function 1 as a placeholder for multi-head. This causes
930 * us confusion instead, especially on the systems where both
931 * functions have the same PCI-ID!
933 if (PCI_FUNC(pdev
->devfn
))
936 /* We've managed to ship a kms-enabled ddx that shipped with an XvMC
937 * implementation for gen3 (and only gen3) that used legacy drm maps
938 * (gasp!) to share buffers between X and the client. Hence we need to
939 * keep around the fake agp stuff for gen3, even when kms is enabled. */
940 if (intel_info
->gen
!= 3) {
941 driver
.driver_features
&=
942 ~(DRIVER_USE_AGP
| DRIVER_REQUIRE_AGP
);
943 } else if (!intel_agp_enabled
) {
944 DRM_ERROR("drm/i915 can't work without intel_agp module!\n");
948 return drm_get_pci_dev(pdev
, ent
, &driver
);
952 i915_pci_remove(struct pci_dev
*pdev
)
954 struct drm_device
*dev
= pci_get_drvdata(pdev
);
959 static int i915_pm_suspend(struct device
*dev
)
961 struct pci_dev
*pdev
= to_pci_dev(dev
);
962 struct drm_device
*drm_dev
= pci_get_drvdata(pdev
);
965 if (!drm_dev
|| !drm_dev
->dev_private
) {
966 dev_err(dev
, "DRM not initialized, aborting suspend.\n");
970 if (drm_dev
->switch_power_state
== DRM_SWITCH_POWER_OFF
)
973 error
= i915_drm_freeze(drm_dev
);
977 pci_disable_device(pdev
);
978 pci_set_power_state(pdev
, PCI_D3hot
);
983 static int i915_pm_resume(struct device
*dev
)
985 struct pci_dev
*pdev
= to_pci_dev(dev
);
986 struct drm_device
*drm_dev
= pci_get_drvdata(pdev
);
988 return i915_resume(drm_dev
);
991 static int i915_pm_freeze(struct device
*dev
)
993 struct pci_dev
*pdev
= to_pci_dev(dev
);
994 struct drm_device
*drm_dev
= pci_get_drvdata(pdev
);
996 if (!drm_dev
|| !drm_dev
->dev_private
) {
997 dev_err(dev
, "DRM not initialized, aborting suspend.\n");
1001 return i915_drm_freeze(drm_dev
);
1004 static int i915_pm_thaw(struct device
*dev
)
1006 struct pci_dev
*pdev
= to_pci_dev(dev
);
1007 struct drm_device
*drm_dev
= pci_get_drvdata(pdev
);
1009 return i915_drm_thaw(drm_dev
);
1012 static int i915_pm_poweroff(struct device
*dev
)
1014 struct pci_dev
*pdev
= to_pci_dev(dev
);
1015 struct drm_device
*drm_dev
= pci_get_drvdata(pdev
);
1017 return i915_drm_freeze(drm_dev
);
1020 static const struct dev_pm_ops i915_pm_ops
= {
1021 .suspend
= i915_pm_suspend
,
1022 .resume
= i915_pm_resume
,
1023 .freeze
= i915_pm_freeze
,
1024 .thaw
= i915_pm_thaw
,
1025 .poweroff
= i915_pm_poweroff
,
1026 .restore
= i915_pm_resume
,
1029 static const struct vm_operations_struct i915_gem_vm_ops
= {
1030 .fault
= i915_gem_fault
,
1031 .open
= drm_gem_vm_open
,
1032 .close
= drm_gem_vm_close
,
1035 static const struct file_operations i915_driver_fops
= {
1036 .owner
= THIS_MODULE
,
1038 .release
= drm_release
,
1039 .unlocked_ioctl
= drm_ioctl
,
1040 .mmap
= drm_gem_mmap
,
1042 .fasync
= drm_fasync
,
1044 #ifdef CONFIG_COMPAT
1045 .compat_ioctl
= i915_compat_ioctl
,
1047 .llseek
= noop_llseek
,
1050 static struct drm_driver driver
= {
1051 /* Don't use MTRRs here; the Xserver or userspace app should
1052 * deal with them for Intel hardware.
1055 DRIVER_USE_AGP
| DRIVER_REQUIRE_AGP
| /* DRIVER_USE_MTRR |*/
1056 DRIVER_HAVE_IRQ
| DRIVER_IRQ_SHARED
| DRIVER_GEM
| DRIVER_PRIME
,
1057 .load
= i915_driver_load
,
1058 .unload
= i915_driver_unload
,
1059 .open
= i915_driver_open
,
1060 .lastclose
= i915_driver_lastclose
,
1061 .preclose
= i915_driver_preclose
,
1062 .postclose
= i915_driver_postclose
,
1064 /* Used in place of i915_pm_ops for non-DRIVER_MODESET */
1065 .suspend
= i915_suspend
,
1066 .resume
= i915_resume
,
1068 .device_is_agp
= i915_driver_device_is_agp
,
1069 .master_create
= i915_master_create
,
1070 .master_destroy
= i915_master_destroy
,
1071 #if defined(CONFIG_DEBUG_FS)
1072 .debugfs_init
= i915_debugfs_init
,
1073 .debugfs_cleanup
= i915_debugfs_cleanup
,
1075 .gem_init_object
= i915_gem_init_object
,
1076 .gem_free_object
= i915_gem_free_object
,
1077 .gem_vm_ops
= &i915_gem_vm_ops
,
1079 .prime_handle_to_fd
= drm_gem_prime_handle_to_fd
,
1080 .prime_fd_to_handle
= drm_gem_prime_fd_to_handle
,
1081 .gem_prime_export
= i915_gem_prime_export
,
1082 .gem_prime_import
= i915_gem_prime_import
,
1084 .dumb_create
= i915_gem_dumb_create
,
1085 .dumb_map_offset
= i915_gem_mmap_gtt
,
1086 .dumb_destroy
= i915_gem_dumb_destroy
,
1087 .ioctls
= i915_ioctls
,
1088 .fops
= &i915_driver_fops
,
1089 .name
= DRIVER_NAME
,
1090 .desc
= DRIVER_DESC
,
1091 .date
= DRIVER_DATE
,
1092 .major
= DRIVER_MAJOR
,
1093 .minor
= DRIVER_MINOR
,
1094 .patchlevel
= DRIVER_PATCHLEVEL
,
1097 static struct pci_driver i915_pci_driver
= {
1098 .name
= DRIVER_NAME
,
1099 .id_table
= pciidlist
,
1100 .probe
= i915_pci_probe
,
1101 .remove
= i915_pci_remove
,
1102 .driver
.pm
= &i915_pm_ops
,
1105 static int __init
i915_init(void)
1107 driver
.num_ioctls
= i915_max_ioctl
;
1110 * If CONFIG_DRM_I915_KMS is set, default to KMS unless
1111 * explicitly disabled with the module pararmeter.
1113 * Otherwise, just follow the parameter (defaulting to off).
1115 * Allow optional vga_text_mode_force boot option to override
1116 * the default behavior.
1118 #if defined(CONFIG_DRM_I915_KMS)
1119 if (i915_modeset
!= 0)
1120 driver
.driver_features
|= DRIVER_MODESET
;
1122 if (i915_modeset
== 1)
1123 driver
.driver_features
|= DRIVER_MODESET
;
1125 #ifdef CONFIG_VGA_CONSOLE
1126 if (vgacon_text_force() && i915_modeset
== -1)
1127 driver
.driver_features
&= ~DRIVER_MODESET
;
1130 if (!(driver
.driver_features
& DRIVER_MODESET
))
1131 driver
.get_vblank_timestamp
= NULL
;
1133 return drm_pci_init(&driver
, &i915_pci_driver
);
1136 static void __exit
i915_exit(void)
1138 drm_pci_exit(&driver
, &i915_pci_driver
);
1141 module_init(i915_init
);
1142 module_exit(i915_exit
);
1144 MODULE_AUTHOR(DRIVER_AUTHOR
);
1145 MODULE_DESCRIPTION(DRIVER_DESC
);
1146 MODULE_LICENSE("GPL and additional rights");
1148 /* We give fast paths for the really cool registers */
1149 #define NEEDS_FORCE_WAKE(dev_priv, reg) \
1150 ((HAS_FORCE_WAKE((dev_priv)->dev)) && \
1151 ((reg) < 0x40000) && \
1152 ((reg) != FORCEWAKE))
1154 ilk_dummy_write(struct drm_i915_private
*dev_priv
)
1156 /* WaIssueDummyWriteToWakeupFromRC6: Issue a dummy write to wake up the
1157 * chip from rc6 before touching it for real. MI_MODE is masked, hence
1158 * harmless to write 0 into. */
1159 I915_WRITE_NOTRACE(MI_MODE
, 0);
1163 hsw_unclaimed_reg_clear(struct drm_i915_private
*dev_priv
, u32 reg
)
1165 if (IS_HASWELL(dev_priv
->dev
) &&
1166 (I915_READ_NOTRACE(FPGA_DBG
) & FPGA_DBG_RM_NOCLAIM
)) {
1167 DRM_ERROR("Unknown unclaimed register before writing to %x\n",
1169 I915_WRITE_NOTRACE(FPGA_DBG
, FPGA_DBG_RM_NOCLAIM
);
1174 hsw_unclaimed_reg_check(struct drm_i915_private
*dev_priv
, u32 reg
)
1176 if (IS_HASWELL(dev_priv
->dev
) &&
1177 (I915_READ_NOTRACE(FPGA_DBG
) & FPGA_DBG_RM_NOCLAIM
)) {
1178 DRM_ERROR("Unclaimed write to %x\n", reg
);
1179 I915_WRITE_NOTRACE(FPGA_DBG
, FPGA_DBG_RM_NOCLAIM
);
1183 #define __i915_read(x, y) \
1184 u##x i915_read##x(struct drm_i915_private *dev_priv, u32 reg) { \
1186 if (IS_GEN5(dev_priv->dev)) \
1187 ilk_dummy_write(dev_priv); \
1188 if (NEEDS_FORCE_WAKE((dev_priv), (reg))) { \
1189 unsigned long irqflags; \
1190 spin_lock_irqsave(&dev_priv->gt_lock, irqflags); \
1191 if (dev_priv->forcewake_count == 0) \
1192 dev_priv->gt.force_wake_get(dev_priv); \
1193 val = read##y(dev_priv->regs + reg); \
1194 if (dev_priv->forcewake_count == 0) \
1195 dev_priv->gt.force_wake_put(dev_priv); \
1196 spin_unlock_irqrestore(&dev_priv->gt_lock, irqflags); \
1198 val = read##y(dev_priv->regs + reg); \
1200 trace_i915_reg_rw(false, reg, val, sizeof(val)); \
1210 #define __i915_write(x, y) \
1211 void i915_write##x(struct drm_i915_private *dev_priv, u32 reg, u##x val) { \
1212 u32 __fifo_ret = 0; \
1213 trace_i915_reg_rw(true, reg, val, sizeof(val)); \
1214 if (NEEDS_FORCE_WAKE((dev_priv), (reg))) { \
1215 __fifo_ret = __gen6_gt_wait_for_fifo(dev_priv); \
1217 if (IS_GEN5(dev_priv->dev)) \
1218 ilk_dummy_write(dev_priv); \
1219 hsw_unclaimed_reg_clear(dev_priv, reg); \
1220 write##y(val, dev_priv->regs + reg); \
1221 if (unlikely(__fifo_ret)) { \
1222 gen6_gt_check_fifodbg(dev_priv); \
1224 hsw_unclaimed_reg_check(dev_priv, reg); \
1232 static const struct register_whitelist
{
1235 uint32_t gen_bitmask
; /* support gens, 0x10 for 4, 0x30 for 4 and 5, etc. */
1237 { RING_TIMESTAMP(RENDER_RING_BASE
), 8, 0xF0 },
1240 int i915_reg_read_ioctl(struct drm_device
*dev
,
1241 void *data
, struct drm_file
*file
)
1243 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1244 struct drm_i915_reg_read
*reg
= data
;
1245 struct register_whitelist
const *entry
= whitelist
;
1248 for (i
= 0; i
< ARRAY_SIZE(whitelist
); i
++, entry
++) {
1249 if (entry
->offset
== reg
->offset
&&
1250 (1 << INTEL_INFO(dev
)->gen
& entry
->gen_bitmask
))
1254 if (i
== ARRAY_SIZE(whitelist
))
1257 switch (entry
->size
) {
1259 reg
->val
= I915_READ64(reg
->offset
);
1262 reg
->val
= I915_READ(reg
->offset
);
1265 reg
->val
= I915_READ16(reg
->offset
);
1268 reg
->val
= I915_READ8(reg
->offset
);