Commit Graph

37 Commits

Author SHA1 Message Date
Bernie Thompson 2685cffa9e staging: udlfb: fix checkpatch and style
Fix warnings detected by tools

Signed-off-by: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-09-05 19:46:14 -07:00
Bernie Thompson 5bea1fbf94 staging: udlfb: fix incorrect fb_defio implementation for multiple framebuffers
Fix fb_defio bug in udlfb for multiple framebuffers

Previously when using fb_defio with multiple DisplayLink attached displays
udlfb incorrectly used a shared datastructure where it needed to have
one per fb_info struct. This was completely broken and caused all kinds of
problems, including rendering to one framebuffer affecting others.

Signed-off-by: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-09-05 19:45:59 -07:00
Bernie Thompson d5ed54322e staging: udlfb: add module options for console and fb_defio
Add module options for console and fb_defio

Convert fb_defio on/off switch to module option and add console option.

>From the command line, pass options to modprobe
modprobe udlfb defio=1 console=1

Or for permanent option, create file like /etc/modprobe.d/options with text
options udlfb defio=1 console=1

Accepted options:

fb_defio	Make use of the fb_defio (CONFIG_FB_DEFERRED_IO) kernel
		module to track changed areas of the framebuffer by page faults.
        	Standard fbdev applications that use mmap but that do not
		report damage, may be able to work with this enabled.
		Disabled by default because of overhead and other issues.

console		Allow fbcon to attach to udlfb provided framebuffers. This
		is disabled by default because fbcon will aggressively consume
		the first framebuffer it finds, which isn't usually what the
		user wants in the case of USB displays.

Signed-off-by: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-09-05 16:50:22 -07:00
Bernie Thompson 8ef8cc4fca staging: udlfb: support for writing backup EDID to sysfs file
Support writing default/backup edid via /sys/class/graphics/fb?/edid

Writing a backup edid blob to the 'edid' file will cause udlfb to
attempt to re-read the edid from hardware.
If we still don't have a good edid, it will use the backup edid instead.
The intent is to 1) enable user-supplied edid
2) enable udev rules to backup the last known good edid
for a device, and then provide that edid as a backup for all future starts

Signed-off-by: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-09-05 16:50:21 -07:00
Bernie Thompson 1572f91cff staging: udlfb: fix big endian rendering error
Fix big endian rendering bug (affects PowerPC)

Thanks to Christian Melki at Ericsson for finding and suggesting patch.

Signed-off-by: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-09-05 16:50:20 -07:00
Bernie Thompson 18dffdf891 staging: udlfb: enhance EDID and mode handling support
Enhance EDID and mode table handling

* Adds support for lower-end DL chips on higher-end monitors
* Adds support for using fbdev standard EDID parsing and handling
* Adds support for more dynamic reallocation of framebuffer, based on new EDID

Queries EDID from hardware with several retries then
queries DisplayLink chip for max pixel area via vendor descriptor.
Uses existing fbdev mode handling service funcations to build mode list
of common modes between adapter and monitor.
This enables lower-end chips (e.g. DL-125) to successfully pick a compatible
mode on higher end monitors (e.g. whose default mode is over 1280x1024).
Reallocate framebuffer if necessary in response to new max mode.

Signed-off-by: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-09-05 16:50:19 -07:00
Bernie Thompson 33077b8d30 staging: udlfb: revamp reference handling to insure successful shutdown
Revamp reference handling and synchronization for unload/shutdown

Udlfb is a "virtual" framebuffer device that really exists on
two separate stacks: at the bottom of the framebuffer interface,
and on top of USB.  During unload, there's no guarantee which
one will tear down first. So reference counting must be solid
to handle all possibilities and not access anything once its gone.

Signed-off-by: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-09-05 16:50:18 -07:00
Bernie Thompson f11f4bc027 staging: udlfb: remove metrics_misc sysfs attribute
Remove metrics_misc sysfs attribute

Previously returned multiple values, which goes against sysfs guidelines.
Had been used for debugging to figure out which of the multiple
fbdev interfaces an app was using, but log file messages are sufficient.

Signed-off-by: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-09-05 16:50:17 -07:00
Bernie Thompson 9825f70f5c staging: udlfb: add DPMS support
Add ability to power off monitor with standard blanking interface

Used by X servers and others to manage power of dislpay

Signed-off-by: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-09-05 16:50:16 -07:00
Bernie Thompson d46ecb9f79 staging: udlfb: fbdev character read and write support
Restore fbdev character read and write support

Enables access to the framebuffer from simple reads and writes
to /dev/fb0 (or fb1, ...). Low performance, because of extra copy
and because udlfb must scan every pixel for changes. But very
useful for testing and simple image display, etc.

Signed-off-by: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-09-05 16:50:15 -07:00
Bernie Thompson df9be302a2 staging: udlfb: Add intro udlfb documentation
Add documentation for the udlfb framebuffer driver for DisplayLink devices.

Signed-off-by: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-09-05 16:50:14 -07:00
Linus Torvalds d79df0b1ed Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6: (577 commits)
  Staging: ramzswap: Handler for swap slot free callback
  swap: Add swap slot free callback to block_device_operations
  swap: Add flag to identify block swap devices
  Staging: vt6655: use ETH_FRAME_LEN macro instead of custom one
  Staging: vt6655: use ETH_DATA_LEN macro instead of custom one
  Staging: vt6655: use ETH_FCS_LEN macro instead of custom one
  Staging: vt6656: use ETH_HLEN macro instead of custom one
  Staging: comedi: quatech_daqp_cs.c Replace eos semaphore with a completion.
  Staging: dt3155v4l: remove private memory allocator
  Staging: crystalhd: Remove typedefs from driver
  Staging: winbond: Fix for pointer name format issue in mds.c
  Staging: vt6656: removed custom UCHAR/USHORT/UINT/ULONG/ULONGLONG typedefs
  Staging: vt6656: removed custom CHAR/SHORT/INT/LONG typedefs
  Staging: comedi: Altered the way printk is used in 8255.c
  staging: iio: adis16350 and similar IMU driver
  Staging: iio: max1363 Fix two bugs in single_channel_from_ring
  Staging: iio: adis16220 extract bin_attribute structures from state
  Staging: iio: adis16220 vibration sensor driver
  Staging: comedi: Kconfig dependancy fixes
  Staging: comedi: fix up build error from last Kconfig changes
  ...
2010-05-21 15:26:46 -07:00
Greg Kroah-Hartman c8d1a12692 Merge staging-next tree into Linus's latest version
Conflicts:
	drivers/staging/arlan/arlan-main.c
	drivers/staging/comedi/drivers/cb_das16_cs.c
	drivers/staging/cx25821/cx25821-alsa.c
	drivers/staging/dt3155/dt3155_drv.c
	drivers/staging/hv/hv.c
	drivers/staging/netwave/netwave_cs.c
	drivers/staging/wavelan/wavelan.c
	drivers/staging/wavelan/wavelan_cs.c
	drivers/staging/wlags49_h2/wl_cs.c

This required a bit of hand merging due to the conflicts
that happened in the later .34-rc releases, as well as
some staging driver changing coming in through other trees
(v4l and pcmcia).

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-05-21 12:48:55 -07:00
Chris Wright 2c3c8bea60 sysfs: add struct file* to bin_attr callbacks
This allows bin_attr->read,write,mmap callbacks to check file specific data
(such as inode owner) as part of any privilege validation.

Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-05-21 09:37:31 -07:00
Greg Kroah-Hartman c220cc3e37 USB: staging: fix up usb_buffer_alloc calls in the staging tree
This renames the functions usb_buffer_alloc and usb_buffer_free to the correct
ones for the drivers in the staging tree.

Cc: Daniel Mack <daniel@caiaq.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-05-20 13:21:38 -07:00
Soeren Moeller b5a2104c98 Staging: udlfb: fix coding style issues
This is a patch to the file udlfb.c that fixes a missing KERN_INFO and
removes one whitespace before a newline.

Signed-off-by: Soeren Moeller <soerenmoeller2001@gmail.com>
Cc: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-05-14 14:02:04 -07:00
Pavel Machek 3b7b31fa7d Staging: udlfb: minor cleanups
This cleans up udlfb a tiny bit.

Signed-off-by: Pavel Machek <pavel@ucw.cz>
Cc: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-05-11 11:35:54 -07:00
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00
Bernie Thompson bd80816b28 Staging: udlfb: remove printk and small cleanup
Remove last remaining printk and clarify comments

Signed-off-by: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-03-03 16:43:00 -08:00
Bernie Thompson dd8015f1c8 Staging: udlfb: explicit dependencies and warnings
Specify Kconfig dependencies, and include warnings for building as a module

udlfb is dependent on FB_DEFERRED_IO, FB_SYS_*, and FB_MODE_HELPERS

Because many kernels do not include defio (which cannot be built
as a module), yet users want to be able to build udlfb as a module later,
udlfb has ifdefs and these dependency warnings to help udlfb build with or
without certain dependencies, but also print warnings for any lost function.

Even though this kind of flexibility isn't common, we've gotten feedback
from a significant portion of users that they were frustrated without it.

Signed-off-by: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-03-03 16:43:00 -08:00
Bernie Thompson 3e8f3d6fa6 Staging: udlfb: Support for fbdev mmap clients (defio)
Add support for fbdev mmap clients who don't send damage ioctls

Because DisplayLink devices are out on the other end of usb, their
"framebuffer" is just normal system memory. So memory mapped writes
don't automatically trigger anything. So up to this point, standard
fbdev clients who rely on mmap() will get an unchanging screen.

This patch makes udlfb a client of Jaya Kumar's defio framework - which sets
up page fault triggers, and those faults are accumulated and sent to udlfb
on a defferred basis, to process as damage notifications for the framebuffer.

Because this involves more overhead than a notification directly from
the application (e.g. just passing on X DAMAGE extension notifications),
a sysfs attribute is provided by udlfb to control defio support.

/sys/class/graphics/fb*/use_defio - writing a "0" to this file before
calling mmap() causes defio to not be initialized - instead udlfb
will rely on getting damage notifications directly through the damage ioctl.

There are unsolved rendering problems with defio (horizontal dead regions
on framebuffer, that accumulate over time) which still needs a fix.

Signed-off-by: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-03-03 16:43:00 -08:00
Bernie Thompson 530f43a8a6 Staging: udlfb: improved rendering performance
Rework rendering for improved performance

Approx 10-20% gain avg across several "benchmarks": x11perf, gtkperf, glxgears
Moves from a single pre-alloc'd urb protected by a long-held mutex
To a list of (4) pre-alloc'd urbs which can be dispatched asynchonously

Improved rendering algorithm to hardware with lower CPU consumption,
fewer system memory accesses, and slightly higher compression.

Better scalability to multiple processors, especially with
multiple framebuffers active.

Signed-off-by: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-03-03 16:43:00 -08:00
Bernie Thompson 2469d5dbca Staging: udlfb: Rework startup and teardown to fix race conditions
Rework probe to use refcounts and std functions

Because the different parts of the driver (usb, fbdev) tear down
in different orders, the driver previously could crash accessing
data that had already been freed.  Refcounting system used to handle.

Reworked probe to make use of refcounts, set mode using std fbops,
and set up sysfs and pre-allocated urbs.

Signed-off-by: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-03-03 16:43:00 -08:00
Bernie Thompson 7d9485e2c5 Staging: udlfb: Add functions to expose sysfs metrics and controls
Add sysfs controls for edid and performance metrics

There are 8 new files exposed in /sys/class/graphics/fb*

edid - returns 128 byte edid blog, suitable for parsing with parse-edid
metrics_bytes_identical
metrics_bytes_rendered
metrics_bytes_sent
metrics_cpu_kcycles_used
metrics_misc
and metrics_reset, which resets all perf metrics to zero

The 6 perf metrics are of type atomic_t.
So these metrics return precise results for short benchmarks, but
any test approx a minute or longer runtime may roll over.

Signed-off-by: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-03-03 16:43:00 -08:00
Bernie Thompson 4574203f45 Staging: udlfb: clean up function naming
Move to more consistent naming scheme

All udlfb functions start with udlfb_
All functions for udlfb's fbdev interface start with udlfb_ops_
All functinos for udlfb's usb interface start with udlfb_usb_

Signed-off-by: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-03-03 16:42:59 -08:00
Bernie Thompson 4a4854dd20 Staging: udlfb: pre-allocated urb list helpers
Add functions to pre-allocate and free usb bulk urbs for core render path.

Udlfb currently allocates a single urb, guarded by a mutex, that is a key
bottleneck. Because udlfb sends so much data, preallocation is most efficient.

Functions will be used by new rendering functions in later patches.

Signed-off-by: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-03-03 16:42:59 -08:00
Bernie Thompson cc403dc67d Staging: udlfb: reorganize function order
Reorganize the location of a few things to be closer to related code

Signed-off-by: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-03-03 16:42:59 -08:00
Bernie Thompson 1d31a9ee69 Staging: udlfb: checkpatch cleanup
Eliminate checkpatch.pl warnings and errors so later patches in series are clean

Signed-off-by: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-03-03 16:42:59 -08:00
Bernie Thompson 59277b679f Staging: udlfb: add dynamic modeset support
Add dynamic modeset support

udlfb uses EDID to find the monitor’s preferred mode
udlfb no longer has fixed mode tables – it’s able to set any mode 
dynamically, from the standard VESA timing characteristics of the monitor.

Draws from probe and setmode code of both displaylink-mod 0.3 branch of 
Roberto De Ioris, and Jaya Kumar's displaylinkfb.
Lays foundation for defio support and making backbuffer optional.
With additional changes to minimize diffs and clean for checkpatch.pl style.

Does not yet include new ioctls or refcount/mutex code from displaylink-mod.

Tested to work with existing xf-video-displaylink X server unmodified.

Signed-off-by: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-03-03 16:42:31 -08:00
Randy Dunlap f66abce705 Staging: udlfb: fix printk format warning
Fix printk format warning: use %td for ptrdiff:

drivers/staging/udlfb/udlfb.h:209: warning: format '%d' expects type 'int', but argument 3 has type 'long int'

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-15 12:02:06 -07:00
Amit Kucheria fb29900217 staging: udlfb: Add vmalloc.h include
Required for vmalloc_32 and vfree declarations on non-x86 platforms.

Signed-off-by: Amit Kucheria <amit.kucheria@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-28 14:07:11 -07:00
Roberto De Ioris 7316bc55ed Staging: udlfb: update to version 0.2.3
This updates the udlfb to the 0.2.3 version.

From: Roberto De Ioris <roberto@unbit.it>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-06-19 11:00:57 -07:00
Greg Kroah-Hartman 4b6a4856c6 Staging: udlfb: fix some sparse warnings.
There are others remaining due to the __iomem namespace of the
framebuffer data pointer.

Cc: Roberto De Ioris <roberto@unbit.it>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-06-19 11:00:57 -07:00
Greg Kroah-Hartman f05e0575ed Staging: udlfb: clean up checkpatch warnings in udlfb.c
This cleans up a bunch of checkpatch.pl warnings in the udlfb.c file.

Cc: Roberto De Ioris <roberto@unbit.it>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-06-19 11:00:57 -07:00
Greg Kroah-Hartman 39e7df5d17 Staging: udlfb: clean up checkpatch warnings in udlfb.h
This cleans up a bunch of checkpatch.pl warnings in the udlfb.h file.

Cc: Roberto De Ioris <roberto@unbit.it>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-06-19 11:00:57 -07:00
Greg Kroah-Hartman 9a82e6df79 Staging: udlfb: add udlfb driver to build
This adds the udlfb driver to the build system

Cc: Roberto De Ioris <roberto@unbit.it>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-06-19 11:00:57 -07:00
Roberto De Ioris 88e58b1a42 Staging: add udlfb driver
This adds the udlfb driver, a framebuffer driver for DisplayLink devices.


From: Roberto De Ioris <roberto@unbit.it>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-06-19 11:00:57 -07:00