Physical DSI bus is protected by a mutex. This patch changed the mutex to
a semaphore, so that we can lock and unlock the bus_lock from different
threads.

This is needed as the update process is started by user space program, and
thus the lock is acquired in that context, but the lock can be released in
different context, a work thread via irq.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

After changing the selection of DSI and DISPC clock source the users of
get_dsi/dispc_clk_source() functions were left unchanged.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

If enabling a dss device failed, omapfb didn't exit, leading to crash.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

If there was a dss device without a driver and thus omapfb probe failed,
ref counts could be left to dss devices.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

If driver's probe failed, the uninit was not called.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

The system to allow panel drivers to exists as attached to ctrl drivers
did never work very well. It is not useed, and this patch removes it to
make the driver cleaner.

For now, controller drivers need to include also the panel driver code. In
the future a proper mechanism for this should be developed, perhaps by
creating busses for controllers.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

When OMAP PM layer is no-op/debug, the PM layer will increment context
loss count with every call. This resulted DSS2 to restore context
whenever a clock was enabled.

This commit checks the context loss count only when the context actually
could have been lost, ie. when enabling a clock when no clocks had been
previously enabled.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

It was not used.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

Instead of configuring only VC0 to be usable, configure all four VCs
similarly. This is needed to utilize the other VCs.

Setting the FIFO sizes evenly for all VCs, regardless of how many VCs are
actually used, is not optimal. However, this affects only cases when
larger amounts of data are written or read via L4, meaning that normal use
cases are not affected.

At some point this could be optimized better to suit different use cases.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

Rename and export dsi_vc_enable_hs() so that the display drivers can
control the mode of the DSI link.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

Add helper functions for most common DCS read and write operations.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

Helper function to clean up the checking of the bus lock.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

dss_select_clk_source() was rather confusing. Selecting the source with
enums is much clearer.

The clk source selection is also stored into memory, so that we know what
is the selected source, even when clocks are off. This is important during
setup, as we need to what clocks to turn on before the clocks are turned
on.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

Fix compilation of the CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS feature.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

Previously the only place to get the size of the display was from the
DSS's sysfs interface, making, for example, configuring overlays and doing
updates on manual displays more difficult.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

The workqueue creation error branch attempted to destroy a NULL wq,
and, in turn, a failed registration does not destroy the newly created
workqueue.

The problem was reported by a static analysis tool.
Signed-off-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

The regulator is now enabled by DSS driver, and thus the panel driver
doesn't need to touch it.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

It looks like on OMAP3 some DSS pins need VDDS_DSI to function properly.

This has not been confirmed from TI, but looking at figure 15-1 "Display
subsystem highlight" from the TRM, some data pins come near the DSI and SDI
blocks. This is not very hard evidence, but the fact remains that with the
power on, pixels are ok, and with the power off, pixels are not ok.

It may also be that VDDS_SDI is needed to power some pins, but as normally
both VDDS_SDI and VDDS_DSI come from the same power source, this hasn't
been shown.

It seems that a single driver can only get a regulator once. This patch
solves it by getting all the required regulators in one place, and from
which the submodules then get the regulators they need.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

The patch extends the Amstrad Delta LCD panel driver with optional support for
changing contrast using standard LCD class device API instead of setting it
silently to a default value at panel enable. It also allows for lowering power
consumption by turning off OMAP_PWL_CLK_ENABLE via lcd_ops.set_power callback.

Created and tested against linux-omap for-next,
commit 155a75d9725e66e5ec8a383822957dee52427057.
Signed-off-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

Support for RGB444 (12-bit) pixel format has been introduced into omapfb/lcdc
by Mark Underwood on 2006-05-26 (commit
f74edb6668aad9fc8e81585861b18f996c78a574) in preparation for Amstrad Delta
(E3) videophone LCD display support.

Before the Amstrad Delta LCD patch by Jonathan McDowell was applied (on
2006-08-04, commit 8d22fb2ea004cdb6379b54c1a8fd1546cfe40ed7), omapfb and lcdc
code was changed substantially (commit
e563dc81aa01bd8bbb01bc53975a15c398715f62 dated 2006-06-26) in a way that broke
Mark's 12-bit display support. Than, a patch by Jonathan, that supposed to
correct the problem, was introduced immediatelly (on 2006-08-04, commit
e10a75b49e7a57ae17c28b705153c70eba15a8ef).

As a result, the Amstrad Delta display was working correctly at boot time,
with fbset reporting:

	geometry 480 320 480 320 16
	...
	rgba 4/8,4/4,4/0,0/0

However, after first framebuffer reinitialization, colors were no longer being
displayed correctly and fbset was reporting:

        rgba 5/11,6/5,5/0,0/0

The patch tries to correct the issue by setting plane->color_mode depending on
panel->bpp, not var->bits_per_pixel.

Created and tested on Amstrad Delta against linux-2.6.33-rc3.
Signed-off-by: Janusz Krzysztofik <jkrzysz@tis.icnet.pl>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

Add support of TPO TD043MTEA1 TFT LCD panel to DSS2 driver.
This panel is used by OMAP3 Pandora device.
Signed-off-by: Grazvydas Ignotas <notasas@gmail.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

Signed-off-by: Mike Rapoport <mike@compulab.co.il>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

Signed-off-by: Vaibhav Hiremath <hvaibhav@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

If the panel's probe had failed, omapfb would still go on, eventually
crashing.

A better fix would be to handle each display properly, and leaving just
the failed display out. But that is a bigger change.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

If the scaling ratio is below 0.5 video output width can't be identical
to the display width. Reject such settings.
Signed-off-by: Ville Syrjälä <ville.syrjala@nokia.com>
Acked-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

Loops checking for certain condition were rather inconsistent.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>
Reported-by: Juha Leppanen <juha_motorsportcom@luukku.com>

Fixes bug causing VRFB memory area to be released twice.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>
Reported-by: Eino-Ville Talvala <talvala@stanford.edu>

Trivial patch which adds the __init/__exit macros to the module_init/
module_exit functions of

drivers/video/omap/lcd_htcherald.c

Please have a look at the small patch and either pull it through
your tree, or please ack' it so Jiri can pull it through the trivial
tree.

Patch against linux-next-tree, 22. Dez 08:38:18 CET 2009
but also present in linus tree.
Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Acked-by: Tony Lindgren <tony@atomide.com>

Signed-off-by: Vaibhav Hiremath <hvaibhav@ti.com>
Acked-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

There isn't really any reason to divide those.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>
Acked-by: Imre Deak <imre.deak@nokia.com>

This should fix:
WARNING: at drivers/base/core.c:131 device_release+0x68/0x7c()
Device 'omapdss' does not have a release() function, it is broken and
must be fixed.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

omapfb platform device was still used to get clocks inside rfbi.c
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>
Tested-by: Sergey Lapin <slapin@ossfans.org>

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

DSI driver didn't check if the panel driver actually implements
enable_te().
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

Collect interrupt statistics, printable via debugfs:

debugfs/omapdss/dispc_irq
debugfs/omapdss/dsi_irq

The counters are reset when printed.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

- dsi_vc_send_short() needs to use dest_per for the peripheral id
- dsi_vc_send_null() was always using channel id 0
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>