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path: root/drivers/gpu/drm/gma500/gtt.c
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2022-03-16drm/gma500: Move GTT memory-range setup into helperThomas Zimmermann1-89/+64
Move the setup code for GTT/GATT memory ranges into a new helper and call the function from psb_gtt_init() and psb_gtt_resume(). Removes code duplication. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Acked-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220308195222.13471-13-tzimmermann@suse.de
2022-03-16drm/gma500: Move GTT enable and disable code into helpersThomas Zimmermann1-35/+46
Move the code for enabling and disabling the GTT into helpers and call the functions in psb_gtt_init(), psb_gtt_fini() and psb_gtt_resume(). Removes code duplication. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Acked-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220308195222.13471-12-tzimmermann@suse.de
2022-03-16drm/gma500: Move GEM memory management functions to gem.cThomas Zimmermann1-126/+1
Move GEM functions from gtt.c to gem.c. Adapt some names. No functional changes. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Acked-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220308195222.13471-11-tzimmermann@suse.de
2022-03-16drm/gma500: Inline psb_gtt_restore()Thomas Zimmermann1-13/+2
Inline psb_gtt_restore() into its only caller in power.c. Perform the GTT restoration in psb_gem_mm_resume(). The restoration step is part of GEM anyway and will be moved over at some point. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Acked-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220308195222.13471-10-tzimmermann@suse.de
2022-03-16drm/gma500: Split GTT init/resume/fini into GTT and GEM functionsThomas Zimmermann1-42/+76
The GTT init, fini and resume functions contain both, GTT and GEM, code. Split each into a separate GTT and a GEM function. The GEM code is responsible for mmap_mutex and the stolen memory area. The rest of the functionality is left in GTT functions. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Acked-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220308195222.13471-9-tzimmermann@suse.de
2022-03-16drm/gma500: Cleanup GTT uninit and error handlingThomas Zimmermann1-24/+25
Replace psb_gtt_takedown() with finalizer function that is only called for unloading the driver. Use roll-back pattern for error handling in psb_gtt_init() and _resume(). Also fixes a bug where vmap_addr was never unmapped. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Acked-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220308195222.13471-8-tzimmermann@suse.de
2022-03-16drm/gma500: Move GTT resume logic out of psb_gtt_init()Thomas Zimmermann1-20/+102
The current implementation of psb_gtt_init() also does resume handling. Move the resume code into its own helper. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Acked-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220308195222.13471-7-tzimmermann@suse.de
2022-03-16drm/gma500: Move GTT setup and restoration into helper funtionsThomas Zimmermann1-47/+68
The GTT init and restore functions contain logic to populate the GTT entries. Move the code into helper functions. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Acked-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220308195222.13471-6-tzimmermann@suse.de
2022-03-16drm/gma500: Remove struct psb_gtt.sem sempahoreThomas Zimmermann1-7/+0
The semaphore at struct psb_mmu_driver.sem protects access to the MMU fields. Additional locking with struct psb_gtt.sem is unnecessary. Remove the field and related code. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Acked-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220308195222.13471-5-tzimmermann@suse.de
2022-03-16drm/gma500: Move GTT locking into GTT helpersThomas Zimmermann1-13/+11
Acquire the GTT mutex in psb_gtt_{insert,remove}_pages(). Remove locking from callers. Also remove the GTT locking around the resume code. Resume does not run concurrently with other GTT operations. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Acked-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220308195222.13471-4-tzimmermann@suse.de
2021-10-19drm/gma500: Rename struct gtt_range to struct psb_gem_objectThomas Zimmermann1-7/+8
struct gtt_range represents a GEM object. Rename the structure to struct psb_gem_object and update all users. No functional changes. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Acked-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/20211015084053.13708-11-tzimmermann@suse.de
2021-10-19drm/gma500: Rewrite GTT page insert/remove without struct gtt_rangeThomas Zimmermann1-56/+37
struct gtt_range represents a GEM object and should not be used for GTT setup. Change psb_gtt_insert() and psb_gtt_remove() to receive all necessary parameters from their caller. This also eliminates possible failure from psb_gtt_insert(). There's one exception in psb_gtt_restore(), which requires an upcast from struct resource to struct gtt_range when restoring the GTT after hibernation. A possible solution would track the GEM objects that need restoration separately from the GTT resource. Rename the functions to psb_gtt_insert_pages() and psb_gtt_remove_pages() to reflect their similarity to MMU interfaces. v3: * restore the comments about locking rules (Patrik) Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Acked-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/20211015084053.13708-10-tzimmermann@suse.de
2021-10-19drm/gma500: Set page-caching flags in GEM pin/unpinThomas Zimmermann1-15/+2
Caching of the GEM object's backing pages are unrelated to GTT management. Move the respective calls from GTT code to GEM code. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Acked-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/20211015084053.13708-9-tzimmermann@suse.de
2021-10-19drm/gma500: Inline psb_gtt_{alloc,free}_range() into rsp callersThomas Zimmermann1-0/+27
psb_gtt_alloc_range() allocates struct gtt_range, create the GTT resource and performs some half-baked initialization. Inline the function into its only caller psb_gem_create(). For creating the GTT resource, introduce a new helper, psb_gtt_alloc_resource() that hides the details of the GTT. For psb_gtt_free_range(), inline the function into its only caller psb_gem_free_object(). While at it, remove the explicit invocation of drm_gem_free_mmap_offset(). The mmap offset is already released by drm_gem_object_release(). v3: * replace offset[static 1] with pointer notation (Patrik) Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Acked-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/20211015084053.13708-8-tzimmermann@suse.de
2021-10-19drm/gma500: Move helpers for struct gtt_range from gtt.c to gem.cThomas Zimmermann1-188/+2
Allocation and pinning helpers for struct gtt_range are GEM functions, so move them to gem.c. No functional changes. v2: * keep docs for psb_gtt_{attach,detach}_pages() (Patrik) Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Acked-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/20211015084053.13708-2-tzimmermann@suse.de
2021-09-23drm/gma500: Replace references to dev_private with helper functionThomas Zimmermann1-9/+9
Replace most references to struct drm_device.dev_private with the new helper function to_drm_psb_private(). The only references left are in assignments and the helper itself. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/20210920141051.30988-2-tzimmermann@suse.de
2021-02-09drm/gma500: Never wait for blitsPatrik Jakobsson1-11/+0
Blits cannot happen anymore since we removed the 2d accel code. Stop checking for a busy blitter and remove the remaining blitter code. Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de> Link: https://patchwork.freedesktop.org/patch/msgid/20210201132617.1233-6-patrik.r.jakobsson@gmail.com
2021-01-06drm/gma500: Remove references to struct drm_device.pdevThomas Zimmermann1-9/+11
Using struct drm_device.pdev is deprecated. Convert gma500 to struct drm_device.dev. No functional changes. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Acked-by: Sam Ravnborg <sam@ravnborg.org> Cc: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/20201201103542.2182-8-tzimmermann@suse.de
2020-11-15drm/gma500: Remove GTT roll supportPatrik Jakobsson1-50/+2
GTT roll support was used to accelerate fb panning on some machines. Unfortunately this never worked properly with multiple monitors and caused issues on others where the framebuffer wouldn't fit in stolen memory. Let's remove it! Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de> Link: https://patchwork.freedesktop.org/patch/msgid/20201028143608.1284-1-patrik.r.jakobsson@gmail.com
2020-01-06remove ioremap_nocache and devm_ioremap_nocacheChristoph Hellwig1-1/+1
ioremap has provided non-cached semantics by default since the Linux 2.6 days, so remove the additional ioremap_nocache interface. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Arnd Bergmann <arnd@arndb.de>
2019-06-19Merge v5.2-rc5 into drm-nextDaniel Vetter1-13/+1
Maarten needs -rc4 backmerged so he can pull in the fbcon notifier removal topic branch into drm-misc-next. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2019-06-05treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 335Thomas Gleixner1-13/+1
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms and conditions of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 51 franklin st fifth floor boston ma 02110 1301 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 111 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190530000436.567572064@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-22drm/gma500: drop drmp.h include from all .c filesSam Ravnborg1-2/+3
Drop remaining uses of the deprecated drmP.h in gma500 Replaced drmp.h with forward declarations or include files as relevant. Moved all include files to blocks in following order: \#include <linux/*> \#include <asm/*> \#include <drm/*> \#include "" And within each block sort the include files alphabetically. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Cc: David Airlie <airlied@linux.ie> Cc: Daniel Vetter <daniel@ffwll.ch> Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190519195526.3422-6-sam@ravnborg.org
2017-05-09drm: use set_memory.h headerLaura Abbott1-0/+1
set_memory_* functions have moved to set_memory.h. Switch to this explicitly. [akpm@linux-foundation.org: track drivers/gpu/drm/i915/i915_gem_gtt.c linux-next changes] Link: http://lkml.kernel.org/r/1488920133-27229-8-git-send-email-labbott@redhat.com Signed-off-by: Laura Abbott <labbott@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-11-08drm/gma500: make function static to eliminate compiling warningJiang Biao1-1/+1
psb_gtt_remove is only used in this file, and make it static to eliminate missing-prototypes compiling warning. Signed-off-by: Jiang Biao <jiang.biao2@zte.com.cn> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/1477972185-24826-1-git-send-email-jiang.biao2@zte.com.cn
2016-10-13drm/gma500: add comments for new parametersJiang Biao1-0/+2
Added comments for new parameters. Signed-off-by: Jiang Biao <jiang.biao2@zte.com.cn> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/1476238699-25820-1-git-send-email-jiang.biao2@zte.com.cn
2015-12-01drm/gma500: Add driver private mutex for the fault handlerDaniel Vetter1-0/+1
There's currently two places where the gma500 fault handler relies upon dev->struct_mutex: - To protect r->mappping - To make sure vm_insert_pfn isn't called concurrently (in which case the 2nd thread would get an error code). Everything else (specifically psb_gtt_pin) is already protected by some other locks. Hence just create a new driver-private mmap_mutex just for this function. With this gma500 is complete dev->struct_mutex free! Cc: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Acked-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1448271183-20523-21-git-send-email-daniel.vetter@ffwll.ch
2014-07-08drm/gem: remove misleading gfp parameter to get_pages()David Herrmann1-1/+1
drm_gem_get_pages() currently allows passing a 'gfp' parameter that is passed to shmem combined with mapping_gfp_mask(). Given that the default mapping_gfp_mask() is GFP_HIGHUSER, it is _very_ unlikely that anyone will ever make use of that parameter. In fact, all drivers currently pass redundant flags or 0. This patch removes the 'gfp' parameter. The only reason to keep it is to remove flags like __GFP_WAIT. But in its current form, it can only be used to add flags. So to remove __GFP_WAIT, you'd have to drop it from the mapping_gfp_mask, which again is stupid as this mask is used by shmem-core for other allocations, too. If any driver ever requires that parameter, we can introduce a new helper that takes the raw 'gfp' parameter. The caller'd be responsible to combine it with mapping_gfp_mask() in a suitable way. The current drm_gem_get_pages() helper would then simply use mapping_gfp_mask() and call the new helper. This is what shmem_read_mapping_pages{_gfp,} does right now. Moreover, the gfp-zone flag-usage is not obvious: If you pass a modified zone, shmem core will WARN() or even BUG(). In other words, the following must be true for 'gfp' passed to shmem_read_mapping_pages_gfp(): gfp_zone(mapping_gfp_mask(mapping)) == gfp_zone(gfp) Add a comment to drm_gem_read_pages() explaining that constraint. Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
2014-03-17drm/gma500: Add backing type and base align to psb_gem_create()Patrik Jakobsson1-2/+2
We'll need this for our gem create ioctl in a later patch. Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
2014-03-17drm/gma500: Hook up the MMUPatrik Jakobsson1-8/+33
Properly init the MMU and add MMU entries when adding GTT entries Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
2013-10-09drm/gma500: fix things after get/put page helpersRob Clark1-0/+1
Commit 8b9ba7a3 'drm/gma500: use gem get/put page helpers' was missing a line, which resulted in garbled screen. Signed-off-by: Rob Clark <robdclark@gmail.com> Tested-by: Guillaume CLÉMENT <gclement@baobob.org> Signed-off-by: Dave Airlie <airlied@redhat.com>
2013-08-19drm/gma500: use gem get/put page helpersRob Clark1-32/+6
Signed-off-by: Rob Clark <robdclark@gmail.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2013-04-17Merge branch 'gma500-next' of git://github.com/patjak/drm-gma500 into drm-nextDave Airlie1-8/+44
Patrik writes: I haven't had much review or testing on other platforms than Poulsbo but at least the following Cedarview bug has been squashed and no regressions reported: https://bugs.freedesktop.org/show_bug.cgi?id=58527 * 'gma500-next' of git://github.com/patjak/drm-gma500: drm/gma500: Add debugging info to psb_gtt_restore() drm/gma500: Check connector status before restoring sdvo gma500:fix build failure for 3.9-rc5 drm/gma500: Fix hibernation problems on sdvo encoders drm/gma500: Add hooks for hibernation drm/gma500: Activate the gtt rebuild on suspend/resume drm/gma500: Add support for rebuilding the gtt drm/gma500: Change fb name so pm-utils doesn't apply quirks gma500: Make VGA and HDMI connector hotpluggable drm/gma500: Clean up various defines drm/gma500: Remove unnecessary function exposure drm/gma500: Type clock limits directly into array and remove defines drm/gma500: Calculate clock in one function instead of three identical drm/gma500: Remove unused i8xx clock limits gma500: medfield: Fix possible NULL pointer dereference drivers: gpu: drm: gma500: Replaced calls kzalloc & memcpy with kmemdup gma500: remove unused drm_psb_no_fb
2013-04-16drm/gma500: Add debugging info to psb_gtt_restore()Patrik Jakobsson1-1/+8
This makes it easier to see what's going on during resume/restore. Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
2013-04-07drm/gma500: Add support for rebuilding the gttPatrik Jakobsson1-8/+37
Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
2013-02-23new helper: file_inode(file)Al Viro1-1/+1
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-11gma500: Clean up some of the noiseAlan Cox1-9/+3
We have a lot of debug type stuff we don't actually need any more. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2012-05-07gma500: gtt: fix __iomem sparse warningsKirill A. Shutemov1-4/+7
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2012-05-07gma500: psb_gtt_init(): drop unused variableKirill A. Shutemov1-2/+1
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2012-04-27gma500: Set the mapping maskAlan Cox1-0/+4
Some boards such as the Intel D2700MUD allow you to have over 4GB of RAM. The GTT on the PVR based devices is 32bit however. Hugh Dickins points out that we should therefore be setting the mapping gfp mask. This is not the whole fix for the problem. Some further shmem patches will be needed to deal with the corner cases. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2012-04-27gma500: mark framebuffer pages write combiningAlan Cox1-1/+1
We don't want them uncached, combining will do nicely and fixes the performance problem with the generic modesetting X server. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2012-03-15drm: Merge tag 'v3.3-rc7' into drm-core-nextDave Airlie1-5/+4
Merge the fixes so far into core-next, needed to test intel driver. Conflicts: drivers/gpu/drm/i915/intel_ringbuffer.c
2012-03-10gma500: gtt: mark psb_gtt_entry() and psb_gtt_alloc() as staticKirill A. Shutemov1-2/+2
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2012-03-06drm, gma500: Fix Cedarview boot failures in 3.3-rcAlan Cox1-5/+4
Production GMA3600/3650 hardware turns out to be subtly different to the development platforms. This combined with a minor driver bug is causing the kernel to hang on these platforms. This patch does the following - turn down a couple of messages that were meant to be debug and are causing much confusion - ensure the hotplug interrupt is disabled on Cedartrail systems. - fix a bug where gtt roll mode called psbfb_sync, which tries to sync the 2D engine. On other devices it is harmless as the 2D engine is present but not in use when in gtt roll mode, on Cedartrail it causes a hang Without these changes 3.3-rc hangs on boot on Cedartrail based systems. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-01-24gma500: Fix shmem mappingAlan Cox1-3/+2
GMA500 did it the old way and it's been on the TODO list to fix. Current kernels now blow up if we use the old way so we'd better do the work! Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-12-06gma500: gtt based hardware scrolling consoleAlan Cox1-3/+48
Add support for GTT based scrolling. Instead of pushing bits around we simply use the GTT to change the mappings. This provides us with a very fast way to scroll the display providing we have enough memory to allocate on 4K line boundaries. In practice this seems to be the case except for very big displays such as HDMI, and the usual configurations are netbooks/tablets. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2011-12-06gma500: do a pass over the FIXME tagsAlan Cox1-11/+19
Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2011-11-16gma500: introduce the GTT and MMU handling logicAlan Cox1-0/+500
This fits alongside the GEM support to manage our resources on the card itself. It's not actually clear we need to configure the MMU at all. Further research is needed before removing it entirely. For now we suck it in (slightly abused) from the old semi-free driver. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
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