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2010-11-10drm/ttm: Be consistent on ttm_bo_init() failuresThomas Hellstrom1-0/+4
Call destroy() on _all_ ttm_bo_init() failures, and make sure that behavior is documented in the function description. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-11-09drm/ttm: Documentation updateThomas Hellstrom1-5/+74
Remove an obsolete comment about mm nodes. Document the new bo range manager interface. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-10-26Merge remote branch 'intel/drm-intel-next' of ../drm-next into drm-core-nextDave Airlie3-1/+9
* 'intel/drm-intel-next' of ../drm-next: (63 commits) drm/i915: Move gpu_write_list to per-ring drm/i915: Invalidate the to-ring, flush the old-ring when updating domains drm/i915/ringbuffer: Write the value passed in to the tail register agp/intel: Restore valid PTE bit for Sandybridge after bdd3072 drm/i915: Fix flushing regression from 9af90d19f drm/i915/sdvo: Remove unused encoding member i915: enable AVI infoframe for intel_hdmi.c [v4] drm/i915: Fix current fb blocking for page flip drm/i915: IS_IRONLAKE is synonymous with gen == 5 drm/i915: Enable SandyBridge blitter ring drm/i915/ringbuffer: Remove broken intel_fill_struct() drm/i915/ringbuffer: Fix emit batch buffer regression from 8187a2b drm/i915: Copy the updated reloc->presumed_offset back to the user drm/i915: Track objects in global active list (as well as per-ring) drm/i915: Simplify most HAS_BSD() checks drm/i915: cache the last object lookup during pin_and_relocate() drm/i915: Do interrupible mutex lock first to avoid locking for unreference drivers: gpu: drm: i915: Fix a typo. agp/intel: Also add B43.1 to list of supported devices drm/i915: rearrange mutex acquisition for pread ...
2010-10-21drm/i915: Enable SandyBridge blitter ringChris Wilson1-1/+5
Based on an original patch by Zhenyu Wang, this initializes the BLT ring for SandyBridge and enables support for user execbuffers. Cc: Zhenyu Wang <zhenyuw@linux.intel.com> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
2010-10-21drm/ttm: Avoid using the ttm_mem_type_manager::put_locked functionThomas Hellstrom1-2/+0
Release the lru spinlock early. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-10-19drm/edid: add helper function to detect monitor audio capabilityZhenyu Wang1-0/+1
To help to determine if digital display port needs to enable audio output or not. This one adds a helper to get monitor's audio capability via EDID CEA extension block. Tested-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com> Reviewed-by: Adam Jackson <ajax@redhat.com> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
2010-10-19Merge remote branch 'airlied/drm-core-next' into tmpChris Wilson3-2/+13
2010-10-19drm, kdb, kms: Change mode_set_base_atomic() enter argument to be an enumJason Wessel1-1/+6
The enter argument as implemented by commit 413d45d3627 (drm, kdb, kms: Add an enter argument to mode_set_base_atomic() API) should be more descriptive as to what it does vs just passing 1 and 0 around. There is no runtime behavior change as a result of this patch. Reported-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Jason Wessel <jason.wessel@windriver.com> CC: David Airlie <airlied@linux.ie> CC: dri-devel@lists.freedesktop.org Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-10-19drm/ttm: add unlocked variant of new manager put node.Dave Airlie1-0/+4
We need the unlocked variant for the new codepath introduced to fix the race condition in master recently. Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-10-19Merge branch 'drm-fixes' of /home/airlied/kernel/linux-2.6 into drm-core-nextDave Airlie1-1/+3
Conflicts: drivers/gpu/drm/i915/intel_fb.c drivers/gpu/drm/radeon/r600_blit_kms.c drivers/gpu/drm/ttm/ttm_bo.c
2010-10-08drm/i915: fetch eDP configuration data from the VBTJesse Barnes1-0/+3
We need to use some of these values in eDP configurations, so be sure to fetch them and store them in the i915 private structure. Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
2010-10-06Merge branch 'drm-kdb-next' into drm-core-nextDave Airlie1-1/+2
* drm-kdb-next: drm/nouveau/kms: Avoid a hang entering KDB with VT accel on. radeon, kdb, kms: Save and restore the LUT on atomic KMS enter/exit drm, kdb, kms: Add an enter argument to mode_set_base_atomic() API drm/nouveau/kms: Implement KDB debug hooks for nouveau KMS. drm/radeon/kms: Implement KDB debug hooks for radeon KMS.
2010-10-06Merge remote branch 'nouveau/for-airlied' of ../drm-nouveau-next into ↵Dave Airlie2-3/+25
drm-core-next [airlied - add fix for vmwgfx build] * 'nouveau/for-airlied' of ../drm-nouveau-next: (93 commits) drm/ttm: restructure to allow driver to plug in alternate memory manager drm/ttm: introduce utility function to free an allocated memory node drm/nouveau: fix thinkos in mem timing table recordlen check drm/nouveau: parse voltage from perf 0x40 entires drm/nouveau: don't use the default pll limits in table v2.1 on nv50+ cards drm/nv50: Fix large 3D performance regression caused by the interchannel sync patches. drm/nouveau: Synchronize buffer object moves in hardware. drm/nouveau: Use semaphores to handle inter-channel sync in hardware. drm/nouveau: Provide a means to have arbitrary work run on fence completion. drm/nouveau: Minor refactoring/cleanup of the fence code. drm/nouveau: Add a module option to force card POST. drm/nv50: prevent (IB_PUT == IB_GET) for occurring unless idle drm/nv0x-nv4x: Leave the 0x40 bit untouched when changing CRE_LCD. drm/nv30-nv40: Fix postdivider mask when writing engine/memory PLLs. drm/nouveau: Fix perf table parsing on BMP v5.25. drm/nouveau: fix required mode bandwidth calculation for DP drm/nouveau: fix typo in c2aa91afea5f7e7ae4530fabd37414a79c03328c drm/nva3: split pm backend out from nv50 drm/nouveau: run perflvl and M table scripts on mem clock change drm/nouveau: pass perflvl struct to clock_pre() ...
2010-10-06drm, kdb, kms: Add an enter argument to mode_set_base_atomic() APIJason Wessel1-1/+2
Some devices such as the radeon chips receive information from user space which needs to be saved when executing an atomic mode set operation, else the user space would have to be queried again for the information. This patch extends the mode_set_base_atomic() call to pass an argument to indicate if this is an entry or an exit from an atomic kernel mode set change. Individual drm drivers can properly save and restore state accordingly. Signed-off-by: Jason Wessel <jason.wessel@windriver.com> CC: Jesse Barnes <jbarnes@virtuousgeek.org> CC: David Airlie <airlied@linux.ie> CC: dri-devel@lists.freedesktop.org Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-10-06drm/vmwgfx: Add a parameter to get the max fb sizeThomas Hellstrom1-0/+1
This can be used by the X server to restrict mode resolutions and size of root pixmap. Bump minor to announce this availability. Bump driver date. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-10-06drm: vmwgfx: Add a struct drm_file parameter to the dirty framebuffer callbackThomas Hellstrom1-1/+2
This is needed for the callback to identify the caller and take appropriate locks if needed. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-10-06Merge remote branch 'korg/drm-fixes' into drm-vmware-nextDave Airlie2-9/+21
necessary for some of the vmware fixes to be pushed in. Conflicts: drivers/gpu/drm/drm_gem.c drivers/gpu/drm/i915/intel_fb.c include/drm/drmP.h
2010-10-06drm/ttm: Fix two race conditions + fix busy codepathsThomas Hellstrom1-1/+3
This fixes a race pointed out by Dave Airlie where we don't take a buffer object about to be destroyed off the LRU lists properly. It also fixes a rare case where a buffer object could be destroyed in the middle of an accelerated eviction. The patch also adds a utility function that can be used to prematurely release GPU memory space usage of an object waiting to be destroyed. For example during eviction or swapout. The above mentioned commit didn't queue the buffer on the delayed destroy list under some rare circumstances. It also didn't completely honor the remove_all parameter. Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=615505 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=591061 Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-10-05drm/ttm: restructure to allow driver to plug in alternate memory managerBen Skeggs2-3/+21
Nouveau will need this on GeForce 8 and up to account for the GPU reordering physical VRAM for some memory types. Reviewed-by: Jerome Glisse <jglisse@redhat.com> Acked-by: Thomas Hellström <thellstrom@vmware.com> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2010-10-05drm/ttm: introduce utility function to free an allocated memory nodeBen Skeggs1-0/+4
Existing core code/drivers call drm_mm_put_block on ttm_mem_reg.mm_node directly. Future patches will modify TTM behaviour in such a way that ttm_mem_reg.mm_node doesn't necessarily belong to drm_mm. Reviewed-by: Jerome Glisse <jglisse@redhat.com> Acked-by: Thomas Hellström <thellstrom@vmware.com> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2010-10-01drm: Move the GTT accounting to i915Chris Wilson1-8/+0
Only drm/i915 does the bookkeeping that makes the information useful, and the information maintained is driver specific, so move it out of the core and into its single user. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Dave Airlie <airlied@redhat.com>
2010-10-01drm: Hold the mutex when dropping the last GEM reference (v2)Chris Wilson1-4/+6
In order to be fully threadsafe we need to check that the drm_gem_object refcount is still 0 after acquiring the mutex in order to call the free function. Otherwise, we may encounter scenarios like: Thread A: Thread B: drm_gem_close unreference_unlocked kref_put mutex_lock ... i915_gem_evict ... kref_get -> BUG ... i915_gem_unbind ... kref_put ... i915_gem_object_free ... mutex_unlock mutex_lock i915_gem_object_free -> BUG i915_gem_object_unbind kfree mutex_unlock Note that no driver is currently using the free_unlocked vfunc and it is scheduled for removal, hasten that process. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=30454 Reported-and-Tested-by: Magnus Kessler <Magnus.Kessler@gmx.net> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: stable@kernel.org Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-10-01drm/gem: handlecount isn't really a kref so don't make it one.Dave Airlie1-5/+13
There were lots of places being inconsistent since handle count looked like a kref but it really wasn't. Fix this my just making handle count an atomic on the object, and have it increase the normal object kref. Now i915/radeon/nouveau drivers can drop the normal reference on userspace object creation, and have the handle hold it. This patch fixes a memory leak or corruption on unload, because the driver had no way of knowing if a handle had been actually added for this object, and the fbcon object needed to know this to clean itself up properly. Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-09-28drm: Prune GEM vma entriesChris Wilson1-0/+1
Hook the GEM vm open/close ops into the generic drm vm open/close so that the private vma entries are created and destroy appropriately. Fixes the leak of the drm_vma_entries during the lifetime of the filp. Reported-by: Matt Mackall <mpm@selenic.com> Cc: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org> Cc: stable@kernel.org Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-09-27drm/radeon: fix PCI ID 5657 to be an RV410Dave Airlie1-1/+1
fixes https://bugzilla.kernel.org/show_bug.cgi?id=19012 cc: stable@kernel.org Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-09-24Merge remote branch 'origin/master' of /home/airlied/kernel//linux-2.6 into ↵Dave Airlie1-1/+9
drm-core-next
2010-09-21intel-gtt: clean up gtt size reportingDaniel Vetter1-2/+0
Consolidate everything in intel-gtt.c and also kill the export of intel_max_stolen. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
2010-09-21Merge branch 'drm-intel-fixes' into HEADChris Wilson1-1/+9
Conflicts: drivers/char/agp/intel-agp.c drivers/gpu/drm/i915/intel_crt.c
2010-09-14drm: Use a nondestructive mode for output detect when polling (v2)Chris Wilson1-1/+8
v2: Julien Cristau pointed out that @nondestructive results in double-negatives and confusion when trying to interpret the parameter, so use @force instead. Much easier to type as well. ;-) And fix the miscompilation of vmgfx reported by Sedat Dilek. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: stable@kernel.org Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-09-13drm: Use a nondestructive mode for output detect when pollingChris Wilson1-1/+2
Destructive load-detection is very expensive and due to failings elsewhere can trigger system wide stalls of up to 600ms. A simple first step to correcting this is not to invoke such an expensive and destructive load-detection operation automatically. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=29536 Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=16265 Reported-by: Bruno Prémont <bonbons@linux-vserver.org> Tested-by: Sitsofe Wheeler <sitsofe@yahoo.com> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: stable@kernel.org Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-09-08drm/i915: die, i915_probe_agp, dieDaniel Vetter1-0/+2
Use the detection from intel-gtt.ko instead. Hooray! Also move the stolen mem allocator to the other gtt stuff in dev_prv->mem. v2: Chris Wilson noted that my error handling was crap. Fix it. He also said that this fixes a problem on his i845. Indeed, i915_probe_agp misses a special case for i830/i845 stolen mem detection. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=25476 Cc: stable@kernel.org Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
2010-09-08intel-gtt: introduce drm/intel-gtt.hDaniel Vetter1-0/+18
Add a few definitions to it that are already shared and that will be shared in the future (like the number of stolen entries). No functional changes in here. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
2010-08-30drm: kill get_reg_ofs callbackDaniel Vetter1-2/+0
Every driver used the default implementation. Fold that one into the only callsite and drop the callback. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-08-30drm: kill dev->timerDaniel Vetter1-1/+0
Totally unused. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-08-30drm: kill agp indirection messDaniel Vetter1-5/+0
There's no point in jumping through two indirections. So kill one and call the kernels agp functions directly. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-08-30drm: replace drawable ioctl by noopsDaniel Vetter1-15/+0
The information supplied by userspace through these ioctls is only accessible by dev->drw_idr. But there's no in-tree user of that. Also userspace does not really care about return values of these ioctls, either. Only hw/xfree86/dri/dri.c from the xserver actually checks the return from adddraw and keeps on trying to create a kernel drawable every time somebody creates a dri drawable. But since that's now a noop, who cares. Therefore it's safe to replace these three ioctls with noops and rip out the implementation. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Reviewed-by: Kristian Høgsberg <krh@bitplanet.net> Reviewed-by: Michel Dänzer <michel@daenzer.net> Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-08-30drm: don't export dri1 locking functionsDaniel Vetter1-1/+0
Only used by ioctl, not by any in-tree drivers. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-08-30drm: kill drm_map_ofs callbacksDaniel Vetter1-2/+0
All drivers happily copy&pasted the default implementation without checking whether this callback is used at all. It's not. Sigh. Kill it. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-08-30drm: drop return value of drm_free_agpDaniel Vetter1-1/+1
No caller (rightly) cares about it, so drop it. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-08-30drm: don't export drm_get_drawable_infoDaniel Vetter1-2/+0
Not used by any in-tree user. So drop it. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-08-30drm: kill context_ctor callbackDaniel Vetter1-1/+0
It's not used by any driver. The destructor callback is unfortunately used by the via driver in a rather convoluted piece of code used to reimplement something resembling broken futexes. I didn't dare to touch this code. But at least kill the needless NULL assignemt in the sis driver. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-08-30drm: kill gem_free_object_unlocked driver callbackDaniel Vetter1-1/+0
Not used by any current driver. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-08-30drm: kill dma_ready callbacksDaniel Vetter1-1/+0
Not used by any driver. So drop it. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-08-30drm: kill procfs callbacksDaniel Vetter1-2/+0
Not used by any driver (rightly so!). Kill them. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-08-30drm: kill kernel_context_switch callbacksDaniel Vetter1-3/+0
Not used by any in-kernel driver. So drop it. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-08-23Merge branch 'drm-core-next' of ↵Linus Torvalds7-23/+39
git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 * 'drm-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6: (33 commits) drm/radeon/kms: fix typo in radeon_compute_pll_gain drm/radeon/kms: try to detect tv vs monitor for underscan drm/radeon/kms: fix sideport detection on newer rs880 boards drm/radeon: fix passing wrong type to gem object create. drm/radeon/kms: set encoder type to DVI for HDMI on evergreen drm/radeon/kms: add back missing break in info ioctl drm/radeon/kms: don't enable MSIs on AGP boards drm/radeon/kms: fix agp mode setup on cards that use pcie bridges drm: move dereference below check drm: fix end of loop test drm/radeon/kms: rework radeon_dp_detect() logic drm/radeon/kms: add missing asic callback assignment for evergreen drm/radeon/kms/DCE3+: switch pads to ddc mode when going i2c drm/radeon/kms/pm: bail early if nothing's changing drm/radeon/kms/atom: clean up dig atom handling drm/radeon/kms: DCE3/4 transmitter fixes drm/radeon/kms: rework encoder handling drm/radeon/kms: DCE3/4 AdjustPixelPll updates drm/radeon: Fix stack data leak drm/radeon/kms: fix GTT/VRAM overlapping test ...
2010-08-17drm: block userspace under allocating buffer and having drivers overwrite it ↵Dave Airlie7-23/+39
(v2) With the current screwed but its ABI, ioctls for the drm, Linus pointed out that we could allow userspace to specify the allocation size, but we pass it to the driver which then uses it blindly to store a struct. Now if userspace specifies the allocation size as smaller than the driver needs, the driver can possibly overwrite memory. This patch restructures the driver ioctls so we store the structure size we are expecting, and make sure we allocate at least that size. The copy from/to userspace are still restricted to the size the user specifies, this allows ioctl structs to grow on both sides of the equation. Up until now we didn't really use the DRM_IOCTL defines in the kernel, so this cleans them up and adds them for nouveau. v2: fix nouveau pushbuf arg (thanks to Ben for pointing it out) Reported-by: Linus Torvalds <torvalds@linuxfoundation.org> Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-08-14include: replace unifdef-y with header-ySam Ravnborg1-12/+14
unifdef-y and header-y has same semantic. So there is no need to have both. Drop the unifdef-y variant and sort all lines again Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2010-08-12Merge branch 'drm-core-next' of ↵Linus Torvalds4-42/+25
git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 * 'drm-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6: (55 commits) io-mapping: move asm include inside the config option vgaarb: drop vga.h include drm/radeon: Add probing of clocks from device-tree drm/radeon: drop old and broken mesa warning drm/radeon: Fix pci_map_page() error checking drm: Remove count_lock for calling lastclose() after 58474713 (v2) drm/radeon/kms: allow FG_ALPHA_VALUE on r5xx drm/radeon/kms: another r6xx/r7xx CS checker fix DRM: Replace kmalloc/memset combos with kzalloc drm: expand gamma_set drm/edid: Split mode lists out to their own header for readability drm/edid: Rewrite mode parse to use the generic detailed block walk drm/edid: Add detailed block walk for VTB extensions drm/edid: Add detailed block walk for CEA extensions drm: Remove unused fields from drm_display_info drm: Use ENOENT consistently for the error return for an unmatched handle. drm/radeon/kms: mark 3D power states as performance drm: Only set DPMS once on the CRTC not after every encoder. drm/radeon/kms: add additional quirk for Acer rv620 laptop drm: Propagate error code from fb_create() ... Fix up trivial conflicts in drivers/gpu/drm/drm_edid.c
2010-08-10drm: expand gamma_setJames Simmons1-1/+1
Expand the crtc_gamma_set function to accept a starting offset. The reason for this is to eventually use this function for setcolreg from drm_fb_helper.c. The fbdev colormap function can start at any offset in the color map. Signed-by: James Simmons <jsimmons@infradead.org> Signed-off-by: Dave Airlie <airlied@redhat.com>