linux/drivers/gpu/drm
Linus Torvalds 27703bb4a6 PTR_RET() is a weird name, and led to some confusing usage. We ended
up with PTR_ERR_OR_ZERO(), and replacing or fixing all the usages.
 
 This has been sitting in linux-next for a whole cycle.
 
 Thanks,
 Rusty.
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Merge tag 'PTR_RET-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux

Pull PTR_RET() removal patches from Rusty Russell:
 "PTR_RET() is a weird name, and led to some confusing usage.  We ended
  up with PTR_ERR_OR_ZERO(), and replacing or fixing all the usages.

  This has been sitting in linux-next for a whole cycle"

[ There are still some PTR_RET users scattered about, with some of them
  possibly being new, but most of them existing in Rusty's tree too.  We
  have that

      #define PTR_RET(p) PTR_ERR_OR_ZERO(p)

  thing in <linux/err.h>, so they continue to work for now  - Linus ]

* tag 'PTR_RET-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux:
  GFS2: Replace PTR_RET with PTR_ERR_OR_ZERO
  Btrfs: volume: Replace PTR_RET with PTR_ERR_OR_ZERO
  drm/cma: Replace PTR_RET with PTR_ERR_OR_ZERO
  sh_veu: Replace PTR_RET with PTR_ERR_OR_ZERO
  dma-buf: Replace PTR_RET with PTR_ERR_OR_ZERO
  drivers/rtc: Replace PTR_RET with PTR_ERR_OR_ZERO
  mm/oom_kill: remove weird use of ERR_PTR()/PTR_ERR().
  staging/zcache: don't use PTR_RET().
  remoteproc: don't use PTR_RET().
  pinctrl: don't use PTR_RET().
  acpi: Replace weird use of PTR_RET.
  s390: Replace weird use of PTR_RET.
  PTR_RET is now PTR_ERR_OR_ZERO(): Replace most.
  PTR_RET is now PTR_ERR_OR_ZERO
2013-09-04 17:31:11 -07:00
..
ast drm/ast: invalidate page tables when pinning a BO 2013-08-07 10:01:56 +10:00
cirrus drm/cirrus: Invalidate page tables when pinning a BO 2013-08-07 10:00:45 +10:00
exynos drm/exynos: Remove module.h header inclusion 2013-07-30 02:01:54 +09:00
gma500 gma500: Fix SDVO turning off randomly 2013-08-22 10:37:49 +10:00
i2c
i810 i810: VM_IO is set by io_remap_pfn_range() 2013-06-29 12:46:40 +04:00
i915 drm/i915: ivb: fix edp voltage swing reg val 2013-08-30 00:07:27 +02:00
mga
mgag200 drm/mgag200: Invalidate page tables when pinning a BO 2013-08-07 10:01:01 +10:00
nouveau drm/nv04/disp: fix framebuffer pin refcounting 2013-08-21 11:36:21 +10:00
omapdrm Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux 2013-07-09 16:04:31 -07:00
qxl qxl: convert qxl driver to proper use for reservations 2013-07-24 11:58:10 +10:00
r128
radeon drm/radeon: fix WREG32_OR macro setting bits in a register 2013-08-15 12:59:45 -04:00
rcar-du drm/rcar-du: Use the GEM PRIME helpers 2013-07-17 15:44:01 +02:00
savage drm (ast, cirrus, mgag200, nouveau, savage, vmwgfx): Remove drm_mtrr_{add, del} 2013-05-31 13:02:54 +10:00
shmobile drm/shmobile: Use the GEM PRIME helpers 2013-07-17 15:43:55 +02:00
sis
tdfx
tilcdc drm/tilcdc: Clear bits of register we're going to set. 2013-06-28 09:13:00 +10:00
ttm drm: make drm_mm_init() return void 2013-07-02 13:34:41 +10:00
udl drm: Drop all the stub gamma_get, gamma_set, load_lut functions from drivers 2013-06-17 19:42:47 +10:00
via
vmwgfx drm/vmwgfx: Split GMR2_REMAP commands if they are to large 2013-08-30 09:03:39 +10:00
ati_pcigart.c
drm_agpsupport.c
drm_auth.c
drm_buffer.c
drm_bufs.c drm: Don't leak phys_wc "handles" to userspace 2013-05-31 13:37:39 +10:00
drm_cache.c
drm_context.c
drm_crtc_helper.c drm/crtc-helper: explicit DPMS on after modeset 2013-07-22 09:55:17 +10:00
drm_crtc.c drm: add hotspot support for cursors. 2013-06-28 09:13:39 +10:00
drm_debugfs.c
drm_dma.c
drm_dp_helper.c
drm_drv.c drm: add hotspot support for cursors. 2013-06-28 09:13:39 +10:00
drm_edid_load.c drm: avoid warning in drm_load_edid_firmware() 2013-07-10 14:21:46 -07:00
drm_edid.c drm: add assertion for checking null edid to drm_edid_block_valid 2013-07-04 10:52:50 +10:00
drm_encoder_slave.c drm: refactor call to request_module 2013-05-10 14:46:03 +10:00
drm_fb_cma_helper.c treewide: Fix typo in printk 2013-05-28 12:02:13 +02:00
drm_fb_helper.c drm/fb-helper: Make load_lut and gamma_set/gamma_get hooks optional 2013-06-17 19:42:47 +10:00
drm_fops.c drm: fix error routines in drm_open_helper 2013-07-04 10:53:37 +10:00
drm_gem_cma_helper.c drm/cma: Replace PTR_RET with PTR_ERR_OR_ZERO 2013-07-16 16:06:01 +09:30
drm_gem.c drm: make drm_mm_init() return void 2013-07-02 13:34:41 +10:00
drm_global.c
drm_hashtab.c
drm_info.c
drm_ioc32.c
drm_ioctl.c drm: Don't leak phys_wc "handles" to userspace 2013-05-31 13:37:39 +10:00
drm_irq.c drm: Don't pass negative delta to ktime_sub_ns() 2013-08-08 09:50:25 +10:00
drm_lock.c
drm_memory.c
drm_mm.c drm/mm: WARN for unclean mm takedown 2013-07-04 10:01:12 +10:00
drm_modes.c drm: Sort connector modes based on vrefresh 2013-06-11 08:35:51 +10:00
drm_pci.c drm, agpgart: Use pgprot_writecombine for AGP maps and make the MTRR optional 2013-05-31 13:37:31 +10:00
drm_platform.c
drm_prime.c drm: add mmap function to prime helpers 2013-07-05 15:44:44 +10:00
drm_proc.c drm: proc: Use remove_proc_subtree() 2013-05-01 17:29:44 -04:00
drm_rect.c drm: Add drm_rect_debug_print() 2013-04-30 22:20:00 +02:00
drm_scatter.c
drm_stub.c drm: drm_stub: Fixing return value if driver master_set call failed 2013-06-27 21:03:16 +10:00
drm_sysfs.c drm: Convert drm class driver from legacy pm ops to dev_pm_ops 2013-07-04 10:50:26 +10:00
drm_trace_points.c
drm_trace.h drm: fix print format of sequence in trace point 2013-07-04 10:55:27 +10:00
drm_usb.c
drm_vm.c drm: io_remap_pfn_range() sets VM_IO... 2013-06-29 12:46:39 +04:00
Kconfig drm/nouveau: always select ACPI_VIDEO if ACPI is enabled. 2013-06-28 11:56:22 +10:00
Makefile drm: Renesas R-Car Display Unit DRM driver 2013-06-27 10:08:04 +10:00
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