* 'viafb-next' of git://github.com/schandinat/linux-2.6: (24 commits)
viafb: Automatic OLPC XO-1.5 configuration
viafb: remove unused CEA mode
viafb: try to map less memory in case of failure
viafb: use write combining for video ram
viafb: add X server compatibility mode
viafb: reduce OLPC refresh a bit
viafb: fix OLPC XO 1.5 device connection
viafb: fix OLPC DCON refresh rate
viafb: delete clock and PLL initialization
viafb: replace custom return values
viafb: some small cleanup for global variables
viafb: gather common good, old VGA initialization in one place
viafb: add engine clock support
viafb: add VIA slapping capability
viafb: split clock and PLL code to an extra file
viafb: add primary/secondary clock on/off switches
viafb: add clock source selection and PLL power management support
viafb: prepare for PLL separation
viafb: call viafb_get_clk_value only in viafb_set_vclock
viafb: remove unused max_hres/vres
...
Currently, a long set of viafb options are needed to get the XO-1.5
laptop to output video (there is only 1 configuration that works, that
can't really be autodetected).
This patch automatically detects and configures viafb for the XO-1.5
laptop, meaning all that is required for working display is that
viafb is loaded.
Signed-off-by: Daniel Drake <dsd@laptop.org>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
The current code might result in trying to remap 512MB video ram on
a 32 bit system which is quite likely to fail.
This patch tries to map less of it down to 8MB as this should still
be enough to get a reasonably well working framebuffer. This should
make viafb work for many people without requiring them to manually
allocate more space.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
This patch adds a config option to be compatible with X servers like
OpenChrome. This is required as for example the X server does not
handle things like disabled IGAs/PLLs resulting in a potential
freeze on X startup. With this option disabled we can provide some
nice features like power management and not reinitializing the
hardware on every mode switch (taking long time, causing flickering).
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
When allowing some PLL calculation we get a frequency that seems to
be a bit higher than what the OLPC DCON likes resulting in a still
readable but not so good image. We don't really know whether this is
a problem with the calculation formula or the OLPC but as other
displays seem to be happy with the other modes adjusting the OLPC
refresh looks like the better thing. This patch prevents a
regression when dynamic PLL calculation is allowed.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
This patch fixes the devices connected on OLPC. The OLPC panel seems
to be connected to DVP1 and LVDS2 for some reasons and if not both
are handled correct the display does not work correct or not at all.
This patch prevents regressions on the OLPC where it worked by
accident but would break in future as the driver did not know the
correct devices connected. This might also fix hardware scaling.
Hopefully the OLPC is the only device with such a requirement but it
will be certainly better to actually know what devices are actually
connected and to not work by accident.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
This patch fixes a regression introduced by
fd3cc69848b7e1873e5f12bbcdd572b20277ecf3a
"viafb: remove duplicated clock storage"
caused by an incosistent mode which pretended to have a higher
refresh rate than it actually had. The wrong refresh rate resulted
in a calculated higher pixclock which the OLPC DCON could not handle.
By reducing the refresh rate to 50Hz we get close to the old
pixclock which makes the OLPC display usable again.
Minor other adjustments are needed as 60Hz is assumed to be a safe
value which is not true for OLPC DCON. This is no problem as we only
support 1200x900 on the OLPC.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Reported-by: Daniel Drake <dsd@laptop.org>
* 'fbdev-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/fbdev-2.6:
efifb: Add override for 11" Macbook Air 3,1
efifb: Support overriding fields FW tells us with the DMI data.
fb: Reduce priority of resource conflict message
savagefb: Remove obsolete else clause in savage_setup_i2c_bus
savagefb: Set up I2C based on chip family instead of card id
savagefb: Replace magic register address with define
drivers/video/bfin-lq035q1-fb.c: introduce missing kfree
video: s3c-fb: fix checkpatch errors and warning
efifb: support AMD Radeon HD 6490
s3fb: fix Virge/GX2
fbcon: Remove unused 'display *p' variable from fb_flashcursor()
fbdev: sh_mobile_lcdcfb: fix module lock acquisition
fbdev: sh_mobile_lcdcfb: add blanking support
viafb: initialize margins correct
viafb: refresh rate bug collection
sh: mach-ap325rxa: move backlight control code
sh: mach-ecovec24: support for main lcd backlight
We do this also in the real program code so there is no reason to
do it here too (and here it's hardly readable).
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
We do not need viafb_second{,_virtual}_{xres,yres} outside of
viafbdev.c so move them there and eliminate the virtual ones where
the only sane usage is done during initalization.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
This patch moves all unprotected VGA initialization in one table and
provides some documentation for those values.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
This patch adds support for enabling and configuring the engine on
VIAs IGPs. This is the main clock used for everything but pixel
output.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
This patch introduces dummy functions to execute when we don't know
what we should do (due to missing documentation). They do nothing
but print a nice message in the log explaining the situation.
To trigger this message initial power management support is
activated which might save a bit energy by disabling PLL and clock
if no device is configured to use them.
Note: The message is only shown for the oldest IGPs CLE266 and K400
as for the other platforms there are reasonable assumptions
how it does (hopefully) work.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
This patch is a huge move operation with some rename and introduces
an interface to still use the functions. This should be a step in
the right direction to reuse the code whenever possible but cleanly
separate code that differs on different platform and keeping the
complexity as low as possible.
pll_config was renamed to via_pll_config to keep the naming scheme.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
This patch adds functions to enable/disable the display clocks.
It also fixes a tiny bug that slipped in with a previous commit but
could not yet have caused any problems.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
This patch adds some support for clock source selection as well as
PLL power management. The code is unused at the moment but was
successfully tested as far as possible.
The implementation is according to the documentation for VX700,
VX800, VX855, VX900. Probably the source selection works like this
starting with K800 and the power managemennt at least since VX700.
(guessed based on the initialization in viamode.c)
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
As no caller is interested in the result call viafb_get_clk_value
directly from viafb_set_vclock to encapsulate the hardware dependend
stuff there.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
This patch removes the max_hres and max_vres which are not used at
the moment. In general they could be useful but it would be better
to get them via any standard EDID implementation and not the buggy
incomplete one currently used which is also removed as far as
possible.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
This patch allows calculating the pll multiplier within limits based
on the previous table. All available information supports that it
should be possible/sane to choose the multiplier free within some
ranges.
Storing the multiplier ranges instead of lots of pll configurations
reduces the memory needed and may as well improve the performance.
It is also expected to provide better pll values resulting in better
frequencies for the connected devices.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
1. simple_strto*() do not contain overflow checks and crufty,
libc way to indicate failure.
2. strict_strto*() also do not have overflow checks but the name and
comments pretend they do.
3. Both families have only "long long" and "long" variants,
but users want strtou8()
4. Both "simple" and "strict" prefixes are wrong:
Simple doesn't exactly say what's so simple, strict should not exist
because conversion should be strict by default.
The solution is to use "k" prefix and add convertors for more types.
Enter
kstrtoull()
kstrtoll()
kstrtoul()
kstrtol()
kstrtouint()
kstrtoint()
kstrtou64()
kstrtos64()
kstrtou32()
kstrtos32()
kstrtou16()
kstrtos16()
kstrtou8()
kstrtos8()
Include runtime testsuite (somewhat incomplete) as well.
strict_strto*() become deprecated, stubbed to kstrto*() and
eventually will be removed altogether.
Use kstrto*() in code today!
Note: on some archs _kstrtoul() and _kstrtol() are left in tree, even if
they'll be unused at runtime. This is temporarily solution,
because I don't want to hardcode list of archs where these
functions aren't needed. Current solution with sizeof() and
__alignof__ at least always works.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
As the iga path is the only remaining information which is also
handled by the active devices there is no reason to keep it.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Later the correct values will be written so there is no need to
write early some values which might be wrong.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
This moves some mode independend initialization code to the function
where the other parts of the initialization are.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
This patch initializes the margins for the initial mode correct.
This is required to get the desired initial refresh rate. Also do
more verbose sanity checking to prevent misbehavior.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
This patch fixes multiple issues with the handling of refresh rates
especially for multi-display setups. If you experienced problems
with wrong refresh rates this patch might fix them.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
This patch splits the pll configs up on pll versions. This allows
easy adding of other known good pll values. Additionally it made it
possible to remove invalid configurations resulting in better
behaviour for such cases. The resulting clocks are no longer stored
resulting in some computing overhead on each mode change.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
The clocks can be easily recalculated by the timing and refresh value.
This brings us one step closer to removing VIAs modetable and use
generic ones and being easier extensible.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Before this patch only clocks that perfectly match were used and if
none existed this was not handled properly. This patch changes this
to always use the closest clock supported. This should behave like
before for clocks that have a perfect match but be much saner for
clocks which are slightly off.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
This patch removes the direct lookup table for resolution+refresh and
pixclock by calculating this information from the mode table. Removes a
lot of dupllication and error potential by just doing a little more
calculations on each mode change.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
These parameters are the same for all currently known VIA IGPs so it
does not make any sense to store them with IGP specific data. This
saves a few bytes and helps a bit in dicovering the real differences.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
This patch removes some write-only variables from the device management
structures. Just a small cleanup.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
This patch removes all internal uses of another mostly artificial
value. It does duplicate the information of the maximum resolution and
it is not flexible as only a few resolutions exist. Hence it is better
to remove it and clean the mess up.
No runtime change expected.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Many local variables should be declared static.
Found by sparse, compile tested only.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
This driver is not respecting the iomem memory space restrictions
and does direct access. This works on x86 but is non-portable and
should not be done. Converted memcpy() of 2 to readw.
Last post increment of romptr was unnecessary since pointer never
used after that.
Found by sparse, compile tested only.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
This patch removes an assignment to the deprecated i2c_adapter.id
field. Since the field isn't used anywhere else in the driver it is
save to remove it.
Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Acked-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
The -rt patches change the console_semaphore to console_mutex. As a
result, a quite large chunk of the patches changes all
acquire/release_console_sem() to acquire/release_console_mutex()
This commit makes things use more neutral function names which dont make
implications about the underlying lock.
The only real change is the return value of console_trylock which is
inverted from try_acquire_console_sem()
This patch also paves the way to switching console_sem from a semaphore to
a mutex.
[akpm@linux-foundation.org: coding-style fixes]
[akpm@linux-foundation.org: make console_trylock return 1 on success, per Geert]
Signed-off-by: Torben Hohn <torbenh@gmx.de>
Cc: Thomas Gleixner <tglx@tglx.de>
Cc: Greg KH <gregkh@suse.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The OLPC XO-1.5 does not use the standard port wiring suggested
in the viafb driver.
This is required for the upcoming OLPC DCON and via-camera drivers,
to be submitted soon.
Signed-off-by: Daniel Drake <dsd@laptop.org>
[fts: removed useless ifdef's and corrected comment]
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Be sure to re-enable GPIO lines on resume. Users still have to
be sure to set them properly.
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Daniel Drake <dsd@laptop.org>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Multiple devices need S/R hooks (framebuffer, GPIO, camera).
Add infrastructure and convert existing framebuffer code to the new
model.
This patch should create no functional change.
Based on earlier work by Jonathan Corbet.
Signed-off-by: Daniel Drake <dsd@laptop.org>
Acked-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Linus Torvalds