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Eugeni Dodonov aa46419186 drm/i915: enable plain RC6 on Sandy Bridge by default

This is yet another chapter in the ongoing saga of bringing RC6 to Sandy
Bridge machines by default.

Now that we have discovered that RC6 issues are triggered by RC6+ state,
let's try to disable it by default. Plain RC6 is the one responsible for
most energy savings, and so far it haven't given any problems - at least,
none we are aware of.

So with this, when i915_enable_rc6=-1 (e.g., the default value), we'll
attempt to enable plain RC6 only on SNB. For Ivy Bridge, the behavior
stays the same as always - we enable both RC6 and deep RC6.

Note that while this exact patch does not has explicit tested-by's, the
equivalent settings were fixed in 3.3 kernel by a smaller patch. And it
has also received considerable testing through Canonical RC6 task-force
testing at https://wiki.ubuntu.com/Kernel/PowerManagementRC6. Up to date,
it looks like all the known issues are gone.

v2: improve description and reference a couple of open bugs related to
RC6 which seem to be fixed with this change.

References: https://bugs.freedesktop.org/show_bug.cgi?id=41682
References: https://bugs.freedesktop.org/show_bug.cgi?id=38567
References: https://bugs.freedesktop.org/show_bug.cgi?id=44867
Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Eugeni Dodonov <eugeni.dodonov@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

2012-04-01 12:28:22 +02:00

exynos

Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux

2012-03-22 13:08:22 -07:00

gma500

gma500: medfield: fix build without CONFIG_BACKLIGHT_CLASS_DEVICE

2012-03-26 09:33:24 +01:00

i2c

drm: add convenience function to create an range property

2012-02-09 10:15:25 +00:00

i810

drm: drop setting vm_file to filp

2012-03-05 11:19:08 +00:00

i915

drm/i915: enable plain RC6 on Sandy Bridge by default

2012-04-01 12:28:22 +02:00

mga

drm: move pci bus master enable into driver.

2012-02-16 18:31:07 +00:00

nouveau

drm/nouveau/i2c: fix thinko/regression on really old chipsets

2012-03-26 09:36:07 +01:00

r128

drm: move pci bus master enable into driver.

2012-02-16 18:31:07 +00:00

radeon

drm/radeon: Only warn if the intra-domain offset actually exceeds the limit.

2012-03-28 13:50:05 +01:00

savage

drivers/gpu/drm/savage/savage_state.c: add missing kfree

2012-03-20 08:45:31 +00:00

sis

drm: move pci bus master enable into driver.

2012-02-16 18:31:07 +00:00

tdfx

drm: Make the per-driver file_operations struct const

2011-11-11 11:14:47 +00:00

ttm

Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux

2012-03-22 13:08:22 -07:00

udl

drm/usb: move usb support into a separate module

2012-03-20 06:59:29 +00:00

via

drm: move pci bus master enable into driver.

2012-02-16 18:31:07 +00:00

vmwgfx

Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux

2012-03-22 13:08:22 -07:00

ati_pcigart.c

gpu: Add export.h as required to drivers/gpu files.

2011-10-31 19:32:03 -04:00

drm_agpsupport.c

drm: kill drm_agp_chipset_flush

2010-11-23 20:14:44 +00:00

drm_auth.c

drm: Fix authentication kernel crash

2012-01-25 09:27:45 +00:00

drm_buffer.c

gpu: Add export.h as required to drivers/gpu files.

2011-10-31 19:32:03 -04:00

drm_bufs.c

gpu: Add export.h as required to drivers/gpu files.

2011-10-31 19:32:03 -04:00

drm_cache.c

drm: remove the second argument of k[un]map_atomic()

2012-03-20 21:48:17 +08:00

drm_context.c

drm: make DRM_UNLOCKED ioctls with their own mutex

2012-01-05 14:43:02 +00:00

drm_crtc_helper.c

drm: allow loading an EDID as firmware to override broken monitor

2012-03-20 10:09:28 +00:00

drm_crtc.c

drm/usb: move usb support into a separate module

2012-03-20 06:59:29 +00:00

drm_debugfs.c

drm: serialize access to list of debugfs files

2011-11-11 11:05:19 +00:00

drm_dma.c

gpu: Add export.h as required to drivers/gpu files.

2011-10-31 19:32:03 -04:00

drm_dp_i2c_helper.c

…

drm_drv.c

drm: add core support for unplugging a device (v2)

2012-03-15 13:35:33 +00:00

drm_edid_load.c

drm: allow loading an EDID as firmware to override broken monitor

2012-03-20 10:09:28 +00:00

drm_edid_modes.h

drm/edid: support CEA video modes.

2011-12-19 14:53:16 +00:00

drm_edid.c

drm: remove unneeded redefinition of DDC_ADDR

2012-03-21 10:19:53 +00:00

drm_encoder_slave.c

gpu: add module.h to drivers/gpu files as required.

2011-10-31 19:32:03 -04:00

drm_fb_helper.c

drm fb helper: remove unused variable crtc_id

2012-02-03 09:55:52 +00:00

drm_fops.c

drm: add core support for unplugging a device (v2)

2012-03-15 13:35:33 +00:00

drm_gem.c

drm: add core support for unplugging a device (v2)

2012-03-15 13:35:33 +00:00

drm_global.c

…

drm_hashtab.c

gpu: Add export.h as required to drivers/gpu files.

2011-10-31 19:32:03 -04:00

drm_info.c

Merge remote branch 'intel/drm-intel-next' of ../drm-next into drm-core-next

2011-03-14 14:15:13 +10:00

drm_ioc32.c

drivers/gpu/drm/drm_ioc32.c: initialize all fields

2012-02-03 09:47:32 +00:00

drm_ioctl.c

drm: add some caps for userspace to discover more info for dumb KMS driver (v2)

2012-02-16 18:35:11 +00:00

drm_irq.c

drm: remove unused code

2012-02-29 10:18:29 +00:00

drm_lock.c

drm: add missing exports for i810 driver.

2011-12-22 19:09:01 +00:00

drm_memory.c

drm: remove unused code

2012-02-29 10:18:29 +00:00

drm_mm.c

gpu: Add export.h as required to drivers/gpu files.

2011-10-31 19:32:03 -04:00

drm_modes.c

drm: Add drm_mode_copy()

2012-03-15 09:52:51 +00:00

drm_pci.c

drm: move pci bus master enable into driver.

2012-02-16 18:31:07 +00:00

drm_platform.c

drm: cope with platformdev->id == -1

2012-03-07 14:03:40 +00:00

drm_proc.c

gpu: Add export.h as required to drivers/gpu files.

2011-10-31 19:32:03 -04:00

drm_scatter.c

drivers: use kzalloc/kcalloc instead of 'kmalloc+memset', where possible

2011-07-25 20:57:13 -07:00

drm_stub.c

drm/usb: move usb support into a separate module

2012-03-20 06:59:29 +00:00

drm_sysfs.c

drm/sysfs: protect sysfs removal code against being run twice.

2012-03-15 13:35:31 +00:00

drm_trace_points.c

…

drm_trace.h

…

drm_usb.c

drm: fix build with UDL if USB is a module

2012-03-16 09:28:03 +00:00

drm_vm.c

drm: add core support for unplugging a device (v2)

2012-03-15 13:35:33 +00:00

Kconfig

Merge branch 'drm-nouveau-next' of git://git.freedesktop.org/git/nouveau/linux-2.6 into drm-next

2012-03-22 14:44:06 +00:00

Makefile

drm: allow loading an EDID as firmware to override broken monitor

2012-03-20 10:09:28 +00:00

README.drm

…

README.drm

************************************************************
* For the very latest on DRI development, please see:      *
*     http://dri.freedesktop.org/                          *
************************************************************

The Direct Rendering Manager (drm) is a device-independent kernel-level
device driver that provides support for the XFree86 Direct Rendering
Infrastructure (DRI).

The DRM supports the Direct Rendering Infrastructure (DRI) in four major
ways:

    1. The DRM provides synchronized access to the graphics hardware via
       the use of an optimized two-tiered lock.

    2. The DRM enforces the DRI security policy for access to the graphics
       hardware by only allowing authenticated X11 clients access to
       restricted regions of memory.

    3. The DRM provides a generic DMA engine, complete with multiple
       queues and the ability to detect the need for an OpenGL context
       switch.

    4. The DRM is extensible via the use of small device-specific modules
       that rely extensively on the API exported by the DRM module.


Documentation on the DRI is available from:
    http://dri.freedesktop.org/wiki/Documentation
    http://sourceforge.net/project/showfiles.php?group_id=387
    http://dri.sourceforge.net/doc/

For specific information about kernel-level support, see:

    The Direct Rendering Manager, Kernel Support for the Direct Rendering
    Infrastructure
    http://dri.sourceforge.net/doc/drm_low_level.html

    Hardware Locking for the Direct Rendering Infrastructure
    http://dri.sourceforge.net/doc/hardware_locking_low_level.html

    A Security Analysis of the Direct Rendering Infrastructure
    http://dri.sourceforge.net/doc/security_low_level.html