si4700_rds_process() should only be called on the rising edge of
RDSR since it now rejects segments out of sequence. Receiving the
same segment multiple times due to rapid polling is of course out
of sequence so do no more processing until RDSR bit cycles to
avoid repeatedly sending the same data instance.

I don't have the tools installed to test compile so there could be
typos. However, I tested on gigabeat-s with YPR0 setup copied over
and it fixed the issue with PS and RT.

Change-Id: Iab511bef64030de8c07d4d22dcf338c8720e2ae2

* Remove unused bits like the radio event and simplify basic
radio interface. It can be more self-contained with rds.h only
required by radio and tuner code.

* Add post-processing to text a-la Silicon Labs AN243. The chip's
error correction can only do so much; additional checks are highly
recommended. Simply testing for two identical messages in a row
is extremely effective and I've never seen corrupted text since
doing that, even with mediocre reception.

Groups segments must arrive in order, not randomly; logic change
only accepts them in order, starting at 0.

Time readout was made a bit better but really we'd need to use
verbose mode and ensure that no errors were seen during receiving
of time and more checks would be need to have a stable PI. The
text is the important bit anyway.

* Time out of stale text.

* Text is no longer updated until a complete group has been
received, as is specified in the standard. Perhaps go back to
scrolling text lines in the radio screen?

* Add proper character conversion to UTF-8. Only the default G0
table for the moment. The other two could be added in.

* Add variants "RDS_CFG_PROCESS" and "RDS_CFG_PUSH" to allow
the option for processed RDS data to be pushed to the driver and
still do proper post-processing (only text conversion for now for
the latter).

Change-Id: I4d83f8b2e89a209a5096d15ec266477318c66925

On Windows 64-bit, the size of long is 32-bit, thus any pointer to long cast is
not valid. In any case, one should use intptr_t and ptrdiff_t when casting
to integers. This commit attempts to fix all instances reported by GCC.
When relevant, I replaced code by the macros PTR_ADD, ALIGN_UP from system.h

Change-Id: I2273b0e8465d3c4689824717ed5afa5ed238a2dc

The kernel on this device reports nonexistent key presses, in particular it
reports right presses when pressing the left button... Since when it happens,
the right press comes after the left one, the new code simply ignores any
right press when the left button in pressed.

Change-Id: Ib6ced02682d9cecf4c7f6c58834907a667419cd7

Change-Id: I8e7ccbcf8a856bc3e08145a795695fb675794495

Change-Id: Iaec43120ef213d9a3c77201bdf50ebbedd1c5b76

Writing 0 instead of '0' to /sys/class/codec/wm8740_mute enables sound on DX90.

Change-Id: Ie8e3980cac6b9298ef2c94f2faac023811d47b32

This patch enables "Settings -> Sound Settings -> DAC's filter roll-off" for the
iBasso DX50.

Confirmed working on iBasso DX50, firmware 1.6.

Change-Id: I901615541d8fa4f6550c5156cf8c6069f5bdf9d0

Depends on http://gerrit.rockbox.org/r/#/c/1043/.

This patch adds a new setting in Settings -> General -> System: USB Mode.

Usable in Quickscreen and Shortcuts.

Possible settings are:
- Mass Storage: The default, on USB connect export the internal and external
drives as usual. Rockbox will exit gracefully in this case, since the internal
drive (/mnt/sdcard) is exported as mass storage device and Android prevents
Rockbox from continued execution.
- Charge Only: USB charge only, do not export the internal and external drives.
This will not close Rockbox.
- ADB: Enable the Android Debug Bridge. This will not close Rockbox.

Charge only and ADB are actually the same, since it is not yet established if
charge only is doable without adb and major hooks into Android.

German translation provided.

This may be genric for Android based devices but is only enabled
for iBasso Devices. Other maintainers may choose do adopt this.

Change-Id: I616247c29946c6595ebcf8f0c14b2410c9f0498b

Depends on http://gerrit.rockbox.org/r/#/c/1043/.

This patch adds a new setting in Settings -> General
-> System: Freq Scaling Governor

Usable in Quickscreen and Shortcuts.

Possible settings are:
- Conservative: Slow frequency switching.
- Ondemand or Interactive: Fast frequency switching.
- Powersave: Allways lowest frequency.
- Performance: Allways highest frequency.

German translation provided.

This may be genric for Android kernel based devices but is only enabled
for iBasso Devices. Other maintainers may choose do adopt this.

Change-Id: I10296f5be9586ad3a409105db0cd03682a30e9c1