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i2c_transfer returns negative errno on error and number of messages
processed on success. Just returning this value would give a poor
interface as it is not obvious that you must compare with 2 after reading
1 or n bytes and with 1 after writing 1 byte to determine if it was
successful. To avoid this error prone interface convert the error code
of a successful read/write to zero and all other non-negative values to
an negative error code.
This fixes a regression introduced by
via: Rationalize vt1636 detection
which resulted in no longer detecting a VT1636 chip and therefore has
broken the output in configurations which contain this chip.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Acked-by: Jonathan Corbet <corbet@lwn.net>
Cc: Joseph Chan <JosephChan@via.com.tw>
Cc: stable@kernel.org
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This patch merges tbl1636 into vt1636 and cleans it up as the data was
only used there anyway. No runtime changes are expected.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Joseph Chan <JosephChan@via.com.tw>
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This patch moves common parts of dvi.c, lcd.c and vt1636.c to hw.c to
start a per output device power management. There should be no runtime
changes aside that this patch enables the proc interface to enable/disable
devices when needed which greatly increases the chances that changes to
the output device configuration will work. However the power management is
not yet complete so it might fail on some configurations. As this area is
quite complex and touches undocumented things there is a slight chance of
regressions.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Joseph Chan <JosephChan@via.com.tw>
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This patch cleans the LCD code up. It forbids overwritting global
decissions like what IGA should be used as the source and whether to
enable the second display channel. Additionally it removes a bit code
duplication.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Joseph Chan <JosephChan@via.com.tw>
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This patch extends the proc entry to contain a possibility to view and
change the output devices for each IGA. This is useful for debugging
output problems as it provides a reliable way to query which low level
devices are active after VIAs output device configuration nightmare
happended. It's as well suitable for daily use as one can change the
output configuration on the fly for example to connect a projector.
At the moment it's still unstable. The reason is that we have to handle
a bunch of undocumented output devices (those without a proper name) and
that this patch is the first step to collect and verify the needed
information. Basically the only configuration change that is expected to
work at the moment is switching output devices between IGA1 and IGA2.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Acked-by: Jonathan Corbet <corbet@lwn.net>
Cc: Joseph Chan <JosephChan@via.com.tw>
Cc: Andrew Morton <akpm@linux-foundation.org>
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This patch merges the remaining functionality of the output path
function in the associated enabling functions. This is very natural as
most of the remaining code does actually enable the device.
Just some more or less intelligent code merge. If no stupid mistakes
occured there should be no regressions.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Joseph Chan <JosephChan@via.com.tw>
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This patch uses the iga{1,2}_devices variables to select which IGA
should be the source. Doing this is convinient, more powerfull
than the older scheme and easy extendable to support further output
devices. It is not yet completed as the device on/off selection needs
to be converted to the same scheme to take full advantage.
No visible changes yet as we want to complete the transition before
anouncing any unstabke interface.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Joseph Chan <JosephChan@via.com.tw>
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This patch adds a new output device management that stores for each
IGA which output devices are routed to it and a compatiblity layer
that converts the old per-output device values in the new format.
Bounding the output devices to each IGA is a central idea of the
cleanup. Doing it this way should be easier and make much more sense
than the old format which happily mixed different output devices
together and did not even take into account that some devices are no
longer available on newer chipsets.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Joseph Chan <JosephChan@via.com.tw>
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The result of viafb_set_iga_path can change after init only in the
hotplug ioctl. So we can move it there rather than doing it always
when a new mode is set. The setup during init is done via a call
from the init chip funtion.
This change enables a stable mapping between the old device scheme
and a new more powerfull one.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Joseph Chan <JosephChan@via.com.tw>
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There are a lot of init functions which are not marked as such.
Fix this.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Joseph Chan <JosephChan@via.com.tw>
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This patch rips the device routing out of the 3 main functions to
separate functions to make them available for transition to a better
controlling scheme.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Joseph Chan <JosephChan@via.com.tw>
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Move the enabling of the second display channel to the generic
output routing function and do it exactly if something is using it.
This unifies a zoo of variants how to do it and does no longer
disable it if LCD is not on the second display which is much saner
as there can be other users who need it. Probably this did not cause
any problems so far as we only recently started dual fb support and
otherwise there won't be other users and LCD is preferred assigned to
second display channel.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Joseph Chan <JosephChan@via.com.tw>
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Move all output path routing directly in the viafb_setmode. This
gives a better overview and allows to factor similar parts out.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Joseph Chan <JosephChan@via.com.tw>
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This is a nop so removing it is safe.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Joseph Chan <JosephChan@via.com.tw>
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This patch moves the power on/off sequences to lcd.c as they are only
used there. This allows removing lcdtbl.h as the other stuff is not
used.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Joseph Chan <JosephChan@via.com.tw>
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Looks like we did reset the PLL of the (whatever) engine instead of
the PLL of the secondary display (IGA2, LCDCK). This patch fixes it.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Joseph Chan <JosephChan@via.com.tw>
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The VIAFB_GET_INFO device ioctl allows unprivileged users to read 246
bytes of uninitialized stack memory, because the "reserved" member of
the viafb_ioctl_info struct declared on the stack is not altered or
zeroed before being copied back to the user. This patch takes care of
it.
Signed-off-by: Dan Rosenberg <dan.j.rosenberg@gmail.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
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drivers/video/via/via-gpio.c: In function 'viafb_gpio_probe':
drivers/video/via/via-gpio.c:216: warning: assignment from incompatible pointer type
Cc: Joseph Chan <JosephChan@via.com.tw>
Cc: Scott Fang <ScottFang@viatech.com.cn>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
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VIA UniChrome and Chrome9 GPUs only exist as Integrated Graphics
Processors in x86 chipsets.
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
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This patch moves two functions from .devexit to .text,
which are called on the probe error path.
Also a function which is called by probe is moved
from .text to .devinit.
WARNING: vmlinux.o(.devinit.text+0x2ca5): Section mismatch in reference
from the function via_pci_probe() to the function
devexit.text:via_teardown_subdevs()
The function __devinit via_pci_probe() references
a function __devexit via_teardown_subdevs().
This is often seen when error handling in the init function
uses functionality in the exit path.
The fix is often to remove the __devexit annotation of
via_teardown_subdevs() so it may be used outside an exit section.
WARNING: vmlinux.o(.devinit.text+0x2cb1): Section mismatch in reference
from the function via_pci_probe() to the function
devexit.text:via_pci_teardown_mmio()
The function __devinit via_pci_probe() references
a function __devexit via_pci_teardown_mmio().
This is often seen when error handling in the init function
uses functionality in the exit path.
The fix is often to remove the __devexit annotation of
via_pci_teardown_mmio() so it may be used outside an exit section.
Signed-off-by: Henrik Kretzschmar <henne@nachtwindheim.de>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
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viafb: fix accel_flags check_var bug
In check_var we should check and modify the var given and not the
one which is currently active. So this code was obviously wrong.
Probably this was doing no harm because all acceleration functions
also check whether acceleration is possible. (otherwise I would
expect this to lead to a null pointer dereference)
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Joseph Chan <JosephChan@via.com.tw>
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viafb: probe cleanups
Removal of strange special cases that must not exist as well as a
useless check.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Joseph Chan <JosephChan@via.com.tw>
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viafb: remove ioctls which break the framebuffer interface
The ioctls VIAFB_SET_DEVICE, VIAFB_SET_DEVICE_INFO and
VIAFB_SET_SECOND_MODE are removed because they prevent a clean
framebuffer driver because they modify the hardware and/or the
internal structures.
There are no known applications using these ioctls so no breakage is
expected. Additionaly the main functionality was duplicating the
framebuffer interface so there really should not exist any user.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Joseph Chan <JosephChan@via.com.tw>
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viafb: update fix before calculating depth
As the depth calculation depends on information in fix it is saner to
do the update first.
No runtime change expected as the value visual in fix used never
changes to MONO.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Joseph Chan <JosephChan@via.com.tw>
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viafb: PLL value cleanup
This is a big change of how PLL values are handled on the road to
dynamic PLL value generation. The table was converted automatically in
the relevant parameters for frequency generation. Sadly there were some
bits set whose meaning is unknown. Those differences are documented
but ignored as the unichrome code implies that they are not important
(a big thanks to Luc for his amazing work).
The PLL values for 31490000 and 133308000 are deleted as they were more
than 5% off and not used anyway. The values for CX700@60466000 and
VX855@153920000 are corrected as they were wrong and easily correctable
as enough correct values was available because CX700 and VX855 support
the same values only with a little difference in hardware format.
All remaining values are not more than 2% off.
Additionally the surrounding code is changed as needed especially the
byte order of the values written to hardware to allow nicer conversion
functions.
This is mostly a change preparing for dynamic PLL generation and the two
corrected values aside no runtime change is expected.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Joseph Chan <JosephChan@via.com.tw>
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viafb: simplify lcd size "detection"
Remove all occurences of get_lcd_size_method as only the values
GET_LCD_SIZE_BY_VGA_BIOS and GET_LCD_SIZE_BY_USER_SETTING were used
which had the identical code so there is no need to make things look
more complicated than they actually are.
Just a bit of of cleanup, really no regressions expected.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Joseph Chan <JosephChan@via.com.tw>
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viafb: fix PCI table
This patch fixes an oddity in the device table where the P4M890 ID was
assigned with the enumeration value of CN700 which itself was missing.
This is a regression introduced by
"viafb: make viafb a first-class citizen using pci_driver"
While at it reorder the table to reflect the order of the enumeration
values.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Joseph Chan <JosephChan@via.com.tw>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Harald Welte <laforge@gnumonks.org>
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viafb: add lcd scaling support for some IGPs
These IGPs should also support lcd scaling but likely this switch was
missed when adding support for them. Fix it, allowing lcd scaling on
CN750, VX800 and VX855. At least this improves the situation for
VX855. (there seems to be another scaling unrelated bug somewhere)
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Joseph Chan <JosephChan@via.com.tw>
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viafb: improve lcd code readability
This changes the code to better reflect that we can (currently) only
perform upscaling.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Joseph Chan <JosephChan@via.com.tw>
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viafb: remove duplicated scaling code
The code for P4M900 does the same as for all newer IGPs so there is no
reason to duplicate it. Just reducing the code to maintain.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Joseph Chan <JosephChan@via.com.tw>
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MAINTAINERS: update viafb entry
List the files that got recently moved to include/linux.
Add myself as a maintainer and remove Scott as his email address is
no longer valid and he has shown no interest in maintaining viafb.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Joseph Chan <JosephChan@via.com.tw>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Harald Welte <laforge@gnumonks.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Input: synaptics - relax capability ID checks on newer hardware
Input: twl40300-keypad - fix handling of "all ground" rows
Input: gamecon - reference correct pad in gc_psx_command()
Input: gamecon - reference correct input device in NES mode
Input: w90p910_keypad - change platfrom driver name to 'nuc900-kpi'
Input: i8042 - add Gigabyte Spring Peak to dmi_noloop_table
Input: qt2160 - rename kconfig symbol name
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git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6
* 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6:
drm/radeon/kms: add quirk to make HP DV5000 laptop resume
drm/radeon/kms: fix RADEON_INFO_CRTC_FROM_ID info ioctl
Fix ttm_page_alloc.c build breakage
drm/radeon/kms: fix legacy LVDS dpms sequence
drm/radeon/kms: drop taking lock around crtc lookup.
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* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: talitos - fix bug in sg_copy_end_to_buffer
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git://git.kernel.org/pub/scm/linux/kernel/git/frob/linux-2.6-roland
* 'x86/auditsyscall' of git://git.kernel.org/pub/scm/linux/kernel/git/frob/linux-2.6-roland:
x86: auditsyscall: fix fastpath return value after reschedule
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git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb:
sysrq,kdb: Use __handle_sysrq() for kdb's sysrq function
debug_core,kdb: fix kgdb_connected bit set in the wrong place
Fix merge regression from external kdb to upstream kdb
repair gdbstub to match the gdbserial protocol specification
kdb: break out of kdb_ll() when command is terminated
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Fix the security problem in the CIFS filesystem DNS lookup code in which a
malicious redirect could be installed by a random user by simply adding a
result record into one of their keyrings with add_key() and then invoking a
CIFS CFS lookup [CVE-2010-2524].
This is done by creating an internal keyring specifically for the caching of
DNS lookups. To enforce the use of this keyring, the module init routine
creates a set of override credentials with the keyring installed as the thread
keyring and instructs request_key() to only install lookup result keys in that
keyring.
The override is then applied around the call to request_key().
This has some additional benefits when a kernel service uses this module to
request a key:
(1) The result keys are owned by root, not the user that caused the lookup.
(2) The result keys don't pop up in the user's keyrings.
(3) The result keys don't come out of the quota of the user that caused the
lookup.
The keyring can be viewed as root by doing cat /proc/keys:
2a0ca6c3 I----- 1 perm 1f030000 0 0 keyring .dns_resolver: 1/4
It can then be listed with 'keyctl list' by root.
# keyctl list 0x2a0ca6c3
1 key in keyring:
726766307: --alswrv 0 0 dns_resolver: foo.bar.com
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-and-Tested-by: Jeff Layton <jlayton@redhat.com>
Acked-by: Steve French <smfrench@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=29062
Reported-by: Andres Cimmarusti <acimmarusti@gmail.com>
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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Older firmwares fixed the middle byte of the Synaptics capabilities
query to 0x47, but starting with firmware 7.5 the middle byte
represents submodel ID, sometimes also called "dash number".
Reported-and-tested-by: Miroslav Šulc <fordfrog@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
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In the CONFIG_AUDITSYSCALL fast-path for x86 64-bit system calls,
we can pass a bad return value and/or error indication for the
system call to audit_syscall_exit(). This happens when
TIF_NEED_RESCHED was set as the system call returned, so we went
out to schedule() and came back to the exit-audit fast-path. The
fix is to reload the user return value register from the pt_regs
before using it for audit_syscall_exit().
Both the 32-bit kernel's fast path and the 64-bit kernel's 32-bit
system call fast paths work slightly differently, so that they
always leave the fast path entirely to reschedule and don't return
there, so they don't have the analogous bugs.
Reported-by: Alexander Viro <aviro@redhat.com>
Signed-off-by: Roland McGrath <roland@redhat.com>
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The kdb code should not toggle the sysrq state in case an end user
wants to try and resume the normal kernel execution.
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Immediately following an exit from the kdb shell the kgdb_connected
variable should be set to zero, unless there are breakpoints planted.
If the kgdb_connected variable is not zeroed out with kdb, it is
impossible to turn off kdb.
This patch is merely a work around for now, the real fix will check
for the breakpoints.
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
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In the process of merging kdb to the mainline, the kdb lsmod command
stopped printing the base load address of kernel modules. This is
needed for using kdb in conjunction with external tools such as gdb.
Simply restore the functionality by adding a kdb_printf for the base
load address of the kernel modules.
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
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The gdbserial protocol handler should return an empty packet instead
of an error string when ever it responds to a command it does not
implement.
The problem cases come from a debugger client sending
qTBuffer, qTStatus, qSearch, qSupported.
The incorrect response from the gdbstub leads the debugger clients to
not function correctly. Recent versions of gdb will not detach correctly as a result of this behavior.
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Dongdong Deng <dongdong.deng@windriver.com>
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Without this patch the "ll" linked-list traversal command won't
terminate when you hit q/Q.
Signed-off-by: Martin Hicks <mort@sgi.com>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
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Return the crtc_id, not the counter value. They are not
necessarily the same.
Cc: Jerome Glisse <glisse@freedesktop.org>
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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The commit 1e8655f87333def92bb8215b423adc65403b08a5
drm/ttm: Fix build on architectures without AGP
looks at TTM_HAS_AGP before it has been set in ttm_bo_driver.h
Move the conditional inclusion of <asm/agp.h> *after* we have included
ttm_bo_driver.h
Signed-of-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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Add delay after turning off the LVDS encoder.
Fixes:
https://bugzilla.kernel.org/show_bug.cgi?id=16389
Tested-by: Jan Kreuzer <kontrollator@gmx.de>
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
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We only add/remove crtcs at driver load, you cannot remove when
the GPU is running a CS packet since the fd is open, when
GPU hotplugging on radeons actually is needed all this locking
needs a review and I've started re-working kms core locking to deal
with this better. But for now avoid long delays in CS processing when
hotplug detect is happening in a different thread.
this fixes a regression introduced with hotplug detection.
Signed-off-by: Dave Airlie <airlied@redhat.com>
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