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ddeea5b0c3
linux/drivers/gpu/drm/i915
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Imre Deak ddeea5b0c3 drm/i915: vlv: add runtime PM support 
Add runtime PM support for VLV, but leave it disabled. The next patch
enables it.

The suspend/resume sequence used is based on [1] and [2]. In practice we
depend on the GT RC6 mechanism to save the HW context depending on the
render and media power wells. By the time we run the runtime suspend
callback the display side is also off and the HW context for that is
managed by the display power domain framework.

Besides the above there are Gunit registers that depend on a system-wide
power well. This power well goes off once the device enters any of the
S0i[R123] states. To handle this scenario, save/restore these Gunit
registers. Note that this is not the complete register set dictated by
[2], to remove some overhead, registers that are known not to be used are
ignored. Also some registers are fully setup by initialization functions
called during resume, these are not saved either. The list of registers
can be further reduced, see the TODO note in the code.

[1] VLV_gfx_clocking_PM_reset_y12w21d3 / "Driver D3 entry/exit"
[2] VLV2_S0IXRegs

v2:
- unchanged
v3:
- fix s/GEN6_PMIIR/GEN6_PMIMR/ typo when saving/restoring registers
  (Ville)
v4:
- rebased on the previous patch fixing GEN register prefixes

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
[ rebased (according to v4) ]
Signed-off-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-05-07 10:01:39 +02:00
..
dvo_ch7xxx.c drm/i915: Remove spurious semicolons 2014-04-09 21:54:33 +02:00
dvo_ch7017.c
dvo_ivch.c drm/i915: Remove spurious semicolons 2014-04-09 21:54:33 +02:00
dvo_ns2501.c drm/i915: Remove spurious semicolons 2014-04-09 21:54:33 +02:00
dvo_sil164.c drm/i915: Remove spurious semicolons 2014-04-09 21:54:33 +02:00
dvo_tfp410.c drm/i915: Remove spurious semicolons 2014-04-09 21:54:33 +02:00
dvo.h
i915_cmd_parser.c Revert "drm/i915: fix build warning on 32-bit (v2)" 2014-05-05 09:09:19 +02:00
i915_debugfs.c drm/i915: Avoid NULL ctx->obj dereference in debugfs/i915_context_info 2014-05-05 10:56:51 +02:00
i915_dma.c drm/i915: remove extraneous VGA power domain put calls 2014-05-05 09:09:17 +02:00
i915_drv.c drm/i915: vlv: add runtime PM support 2014-05-07 10:01:39 +02:00
i915_drv.h drm/i915: vlv: add runtime PM support 2014-05-07 10:01:39 +02:00
i915_gem_context.c Merge tag 'drm-intel-next-2014-04-16' of git://anongit.freedesktop.org/drm-intel into drm-next 2014-05-01 09:11:37 +10:00
i915_gem_debug.c drm/i915: prefer struct drm_i915_private to drm_i915_private_t 2014-03-31 15:34:21 +02:00
i915_gem_dmabuf.c drm/i915: dma_buf_vunmap is presumed not to fail, don't let it 2014-04-09 15:03:05 +02:00
i915_gem_evict.c drm/i915: prefer struct drm_i915_private to drm_i915_private_t 2014-03-31 15:34:21 +02:00
i915_gem_execbuffer.c drm/i915: Support 64b relocations 2014-05-05 16:04:23 +02:00
i915_gem_gtt.c drm/i915/chv: Flush caches when programming page tables 2014-05-06 18:30:08 +02:00
i915_gem_gtt.h drm/i915/chv: PPAT setup for Cherryview 2014-05-06 18:29:34 +02:00
i915_gem_stolen.c drm/i915: restrict vt-d stolen memory workaround to pre-gen8 2014-03-31 10:45:34 +02:00
i915_gem_tiling.c drm/i915: prefer struct drm_i915_private to drm_i915_private_t 2014-03-31 15:34:21 +02:00
i915_gem.c drm/i915: Move semaphore specific ring members to struct 2014-05-05 10:56:52 +02:00
i915_gpu_error.c drm/i915: Move semaphore specific ring members to struct 2014-05-05 10:56:52 +02:00
i915_ioc32.c
i915_irq.c drm/i915: Make sprite updates atomic 2014-05-06 10:18:02 +02:00
i915_params.c drm/i915: Add debug module option for VTd validation 2014-04-03 11:23:11 +02:00
i915_reg.h drm/i915: add various missing GTI/Gunit register definitions 2014-05-07 10:01:38 +02:00
i915_suspend.c drm/i915: Kill most of the FBC register save/restore 2014-01-25 21:17:03 +01:00
i915_sysfs.c drm/i915: get a runtime PM ref for debugfs entries where needed 2014-05-05 09:08:55 +02:00
i915_trace_points.c
i915_trace.h drm/i915: Add pipe update trace points 2014-05-06 10:18:03 +02:00
i915_ums.c drm/i915: Only restore backlight combination mode reg for ums 2014-01-24 17:22:45 +01:00
intel_acpi.c Merge branch 'acpi-dsm' 2014-01-12 23:45:52 +01:00
intel_bios.c drm/i915: Validate VBT header before trusting it 2014-05-05 09:08:59 +02:00
intel_bios.h Merge tag 'drm-intel-next-2014-04-16' of git://anongit.freedesktop.org/drm-intel into drm-next 2014-05-01 09:11:37 +10:00
intel_crt.c drm/i915/crt: Remove ->mode_set callback 2014-05-05 10:56:59 +02:00
intel_ddi.c drm/i915: fix WARNs when reading DDI state while suspended 2014-04-01 22:53:45 +02:00
intel_display.c drm/i915: Remove useless checks from primary enable/disable 2014-05-06 10:18:04 +02:00
intel_dp.c drm/i915: vlv: check port power domain instead of only D0 for eDP VDD on 2014-05-05 09:09:03 +02:00
intel_drv.h drm/i915: Make sprite updates atomic 2014-05-06 10:18:02 +02:00
intel_dsi_cmd.c drm/i915: Send DPI command explicitely in LP mode 2014-04-09 21:54:30 +02:00
intel_dsi_cmd.h drm/i915: Send DPI command explicitely in LP mode 2014-04-09 21:54:30 +02:00
intel_dsi_pll.c drm/i915: Try harder to get best m, n, p values with minimal error 2013-12-11 23:52:18 +01:00
intel_dsi.c drm/i915: Enable RANDOM resolution support for MIPI panels 2014-04-09 21:54:31 +02:00
intel_dsi.h drm/i915: Parameterize the Clockstop and escape_clk_div 2014-04-09 21:54:29 +02:00
intel_dvo.c drm/i915/dvo: Remove ->mode_set callback 2014-05-05 10:56:55 +02:00
intel_fbdev.c drm/i915: Discard BIOS framebuffers too small to accommodate chosen mode 2014-04-24 13:34:37 +03:00
intel_hdmi.c Merge tag 'drm-intel-next-2014-04-16' of git://anongit.freedesktop.org/drm-intel into drm-next 2014-05-01 09:11:37 +10:00
intel_i2c.c drm/i915: Disable dp aux irq on g4x 2014-02-07 16:40:07 +01:00
intel_lvds.c drm/i915: Don't set the 8to6 dither flag when not scaling 2014-04-13 11:59:32 +02:00
intel_modes.c
intel_opregion.c Merge tag 'drm-intel-fixes-2014-02-06' of ssh://git.freedesktop.org/git/drm-intel into drm-next 2014-02-11 12:57:27 +10:00
intel_overlay.c Merge tag 'drm-intel-fixes-2014-04-04' of git://anongit.freedesktop.org/drm-intel into drm-next 2014-04-05 16:14:21 +10:00
intel_panel.c Merge tag 'drm-intel-next-2014-04-16' of git://anongit.freedesktop.org/drm-intel into drm-next 2014-05-01 09:11:37 +10:00
intel_pm.c drm/i915: Merge LP1+ watermarks in safer way 2014-05-06 10:18:04 +02:00
intel_ringbuffer.c drm/i915: Support 64b execbuf 2014-05-05 16:01:58 +02:00
intel_ringbuffer.h drm/i915: Support 64b execbuf 2014-05-05 16:01:58 +02:00
intel_sdvo_regs.h drm/i915: use __packed instead of __attribute__((packed)) 2013-12-03 18:19:49 +01:00
intel_sdvo.c drm/i915/sdvo: Remove ->mode_set callback 2014-05-05 10:57:00 +02:00
intel_sideband.c drm/i915: Warn when DPIO read returns 0xffffffff 2014-04-03 11:28:39 +02:00
intel_sprite.c drm/i915: Add pipe update trace points 2014-05-06 10:18:03 +02:00
intel_tv.c drm/i915/tv: Remove ->mode_set callback 2014-05-05 10:56:59 +02:00
intel_uncore.c drm/i915/bdw: enable eDRAM. 2014-05-05 09:09:23 +02:00
Kconfig Merge tag 'drm-intel-next-2014-04-16' of git://anongit.freedesktop.org/drm-intel into drm-next 2014-05-01 09:11:37 +10:00
Makefile Merge remote-tracking branch 'airlied/drm-next' into drm-intel-next 2014-03-18 09:43:56 +01:00