OMAPDSS: DSSCOMP: efficiency improvement.

This change adds 3 local caches of objects, which are used at each flip buffer
action. In original variant kzalloc()/kfree() functions are called each time
dsscomp_gralloc_queue() function is called. This meens that slab|slob|slub
common cache is used at each frame draw action. Call to kzalloc()/kfree()
result in synchronization with other code, which uses common cache, and can
result in dips in FPS, when other code allocates/frees memory.
This change improves reliability, autonomy and efficiency of DSSCOMP module.

Change-Id: Id50778f4579309fb71318a32820b9d6441a6dac1
Signed-off-by: Mykhailo Denysiuk <x0172934@ti.com>
Signed-off-by: Dan Trifan <jimsth@gmail.com>
OMAPDSS: DISPC: Pipe threshold sizes power optimization.

This patch changes the calculation of thresholds and sets low
threshold to half of buffer size for OMAP4. The memory will
able to sleep between transactions to dss because dss will
read by big chunks.

boype: Also removed dispc_calculate_threshold function, as it is no longer used.

Backport from TI omapzoom kernel 3.4 repo, based upon:
http://git.omapzoom.org/?p=kernel/omap.git;a=commit;h=cd99eb345e1ad26ffbc665f46ea917dad762937b

Signed-off-by: Dan Trifan <jimsth@gmail.com>
OMAPDSS: drop small YUV encoded frames on OMAP44xx

OMAP44xx has hardware limitation: in stall mode, when the frame pixel size
is less than output SyncFifo depth(16), DISPC hangs without sending any data.
Simple workaround is to drop such frame, as cases when YUV frames of this size
are very rare.

Change-Id: I31dc262b07a52b66209c093f136ad2bac66f9439
Signed-off-by: Sergiy Kibrik <sergiy.kibrik@globallogic.com>
Signed-off-by: Dan Trifan <jimsth@gmail.com>
OMAPDSS: DISPC: fix pclk divisor limits

According to TRM, minimal pixel clock divisor value can be 1.
Fix corresponding checks, as high resolution panels use undivided
pixel clock frequency.

Also certain scaler unit constraint must be met: in case DISPC_CLK
and pixel clock frequencies are equal, set IPC to work on rising edge.

Change-Id: Iabeac2ad81f6909213cb81f4e16b1d0762369b53
Signed-off-by: Sergiy Kibrik <sergiy.kibrik@globallogic.com>
Signed-off-by: Lajos Molnar <lajos@ti.com>
Signed-off-by: Dima Svetlov <svetlov@ti.com>
Signed-off-by: Dan Trifan <jimsth@gmail.com>
OMAPDSS: DISPC: more precise scale limits checking

Use division with rounding-up when checking if maximum downscale ratio
was reached. This allows to avoid SYNC_LOST errors in case when small
amount of extra pixels or lines (usually 1-3) not taken into account

Change-Id: Id8f88c64671146a64738cfd820378bb7a28c1455
Signed-off-by: Sergiy Kibrik <sergiy.kibrik@globallogic.com>
Signed-off-by: Dan Trifan <jimsth@gmail.com>
HSMMC:Set disable timeout to 1ms

The disable timeout is reduced from 100ms to 1ms in order
to obtain aggressive power saving.

Cherry picked from p-android-omap-2.6.35 commit ID:
50df9d10a9b33c82ad02003686050b12b03d4dfe

Change-Id: Ieaa47d51396e7b92f6c1ba71e62900c58a05a26c
Signed-off-by: Madhusudhan Chikkature <madhu.cr@ti.com>
Signed-off-by: Viswanath Puttagunta <vishp@ti.com>
Signed-off-by: Dan Trifan <jimsth@gmail.com>
MMC: OMAP HSMMC: Enable Auto CMD12

Configure OMAP HSMMC module to support Auto CMD12.
This will increase throughput during multi-block
command operations as CMD12 does not have to be
explicitly sent each time by software intervention.
Instead, hardware will send CMD12 after desired
number of blocks are transferred.

Change-Id: I37bf31399c80531d9fd76baa736a59a118c769b0
Signed-off-by: Viswanath Puttagunta <vishp@ti.com>
Signed-off-by: Dan Trifan <jimsth@gmail.com>
mmc: OMAP HSMMC: Add cmd23 support

Add support for set block count, close ended transfer

Change-Id: Iab7386e1171a42ebdf55306fbf291a3e6dd85b40
Signed-off-by: Viswanath Puttagunta <vishp@ti.com>
Signed-off-by: Dan Trifan <jimsth@gmail.com>
omap4-hsmmc : Adding ADMA support

Adds ADMA support for HSMMC controllers 1 & 2 on OMAP4
Ensure dma-sg list coming from block layer is unmapped after
every transfer completion.

Change-Id: I1b898f771a3119804920c5cd17ec9c4456c60916
Signed-off-by: Viswanath Puttagunta <vishp@ti.com>
Signed-off-by: Kishore Kadiyala <kishore.kadiyala@ti.com>
Signed-off-by: David Taylor <x0158378@ti.com>
Signed-off-by: Dan Trifan <jimsth@gmail.com>
mmc: omap: align adma and dma table entries

mmc->max_segs to core layer was set to 1024, but
adma table entry could only hold 512 entries. Increase
adma table entry size to 1024 from 512 to avoid mismatch.

Also set max_blk_count, max_req_size to what adma can
handle.

Change-Id: I8e08ee39bfa966bdf8a6c4374aea82b34fedcc62
Signed-off-by: Viswanath Puttagunta <vishp@ti.com>
Signed-off-by: Dan Trifan <jimsth@gmail.com>
mmc: omap: Increase number of blks we can handle

The above block layer is doing a "min" of max_req_size
and max_blk_count*512 before submitting each request.

As a result, the maximum size of request we are getting
is only 120*512 = 60KB even though each line in the
ADMA table can handle can handle that data alone.

So, we increase the max_blk_count we can handle. Also,
note that worst case is when above block layer gives
us 512 segments, in which there are 511 single block
entries, but one large block that is of size
mmc->max_req_size - (511*512) bytes.

In this case, we use the reserved 512 table entries
to break up the large request. Also adjust the
max_segs accordingly.

Change-Id: I733effdebea94f51a49bbf323950529afbb00dc4
Signed-off-by: Viswanath Puttagunta <vishp@ti.com>
Signed-off-by: Dan Trifan <jimsth@gmail.com>
omap-hsmmc: Implementation of i761 errata

Errata description:
Due to a bad behavior of an internal signal, the Card Error interrupt bit
MMCHS_STAT[28] CERR may not be set sometimes when an error occurred in the
card response.

Workaround:
After responses of type R1/R1b for all cards and responses of type R5/R5b/R6
for SD and SDIO cards, software must read two registers: MMCHS_RSP10 and
MMCHS_CSRE. When a MMCHS_CSRE[i] bit is set to 1, if the corresponding bit at
the same position in the response MMCHS_RSP10[i] is set to 1, the host
controller indicates a card error and software should proceed in the same way
as if a CERR interrupt would have been detected in the MMCHS_STAT register.

Note:
This errata is applicable for omap44xx.

Change-Id: Ib024bfb0624df04b7d6c61c129cbd9a34f919814
Signed-off-by: Semen Protsenko <semen.protsenko@ti.com>
Signed-off-by: Dan Trifan <jimsth@gmail.com>
ARM: 7173/1: Add optimised swahb32() byteswap helper for v6 and above

ARMv6 and later processors have the REV16 instruction, which swaps
the bytes within each halfword of a register value.

This is already used to implement swab16(), but since the native
operation performaed by REV16 is actually swahb32(), this patch
renames the existing swab16() helper accordingly and defines
__arch_swab16() in terms of it.  This allows calls to both swab16()
and swahb32() to be optimised.

The compiler's generated code might improve someday, but as of
4.5.2 the code generated for pure C implementing these 16-bit
bytesswaps remains pessimal.

swahb32() is useful for converting 32-bit Thumb instructions
between integer and memory representation on BE8 platforms (among
other uses).

Signed-off-by: Dave Martin <dave.martin@linaro.org>
Reviewed-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Dan Trifan <jimsth@gmail.com>
nohz: Fix update_ts_time_stat idle accounting

update_ts_time_stat currently updates idle time even if we are in
iowait loop at the moment. The only real users of the idle counter
(via get_cpu_idle_time_us) are CPU governors and they expect to get
cumulative time for both idle and iowait times.
The value (idle_sleeptime) is also printed to userspace by print_cpu
but it prints both idle and iowait times so the idle part is misleading.

Let's clean this up and fix update_ts_time_stat to account both counters
properly and update consumers of idle to consider iowait time as well.
If we do this we might use get_cpu_{idle,iowait}_time_us from other
contexts as well and we will get expected values.

Signed-off-by: Michal Hocko <mhocko@suse.cz>
Cc: Dave Jones <davej@redhat.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Link: http://lkml.kernel.org/r/e9c909c221a8da402c4da07e4cd968c3218f8eb1.1314172057.git.mhocko@suse.cz
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Dan Trifan <jimsth@gmail.com>
temp_control: increase the maximum temperature treshold to 75 degrees Celsius

Signed-off-by: Dan Trifan <jimsth@gmail.com>