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Marcin Bukat 5c5dac2dbc rk27xx: clip LCD updates to the screen
lcd_update_rect() took the rect as given. One reaching past the screen
set a GRAM window off the panel, so the update showed nothing, and
built one DMA descriptor per line into scr_llp[LCD_HEIGHT] - past its
end for a rect taller than what is left of the screen. What follows
scr_llp in memory is the PCM driver's locks and then all_queues, the
kernel's queue list: a later broadcast posted to garbage.

invadrox asks for such a rect every frame. On a Samsung YP-CP3 nothing
of its playfield moved - aliens, bombs, the ship - and powering off
afterwards took a data abort in queue_post() from interrupt context.

Clip the rect to the screen, as other targets do, and do nothing if
nothing is left. Every rk27xx screen is a multiple of 4 pixels each
way, so aligning the clipped rect to 4 cannot take it past the edge.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Change-Id: I1f8bf865251859cd223e208a807c9a9da76a0ba0
2026-10-02 10:30:58 +02:00
android chore: Get rid of *all* vestigal CVS '$Id:$' tags 2026-06-01 16:01:18 -04:00
apps imageviewer/jpeg: reject damaged files safely 2026-10-01 19:32:57 -04:00
backdrops ap80max: New hosted port 2026-08-13 17:55:06 -07:00
bootloader h1x0/h3x0: Get rid of redundant cut-down bidi_l2v() function 2026-09-29 10:16:26 -04:00
docs docs: Fix case of "iPod" in area name and history 2026-10-01 17:32:24 -04:00
firmware rk27xx: clip LCD updates to the screen 2026-10-02 10:30:58 +02:00
fonts chore: Get rid of *all* vestigal CVS '$Id:$' tags 2026-06-01 16:01:18 -04:00
icons chore: Get rid of *all* vestigal CVS '$Id:$' tags 2026-06-01 16:01:18 -04:00
lib opus: filter the PLC excitation in place 2026-09-30 11:25:30 -04:00
manual manual: Fix case of "iPod" 2026-09-30 07:58:19 -04:00
packaging 3ds: Port refactor. 2026-09-01 08:39:07 -04:00
tools Fix case of "iPod" in docs and CLI tools help 2026-10-01 17:32:24 -04:00
uisimulator Add "rbfs" prefix to native filesystem functions 2026-09-17 16:22:31 -04:00
utils Fix case of "iPod" in docs and CLI tools help 2026-10-01 17:32:24 -04:00
wps ap80max: New hosted port 2026-08-13 17:55:06 -07:00
.gitattributes Add a gitattributes file for the migration. 2011-12-01 14:14:59 +00:00
.gitignore misc: Update gitignore to cover a bunch of utils/* binaries 2026-06-17 13:56:29 -04:00
.gitreview misc: Add a .gitreview file for better gerrit integration 2021-06-24 07:22:19 -04:00

               __________               __   ___.
     Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
     Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
     Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
     Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
                       \/            \/     \/    \/            \/

Build Your Own Rockbox

1. Clone 'rockbox' from git (or extract a downloaded archive).

   $ git clone git://git.rockbox.org/rockbox

     or

   $ tar xJf rockbox.tar.xz

2. Create a build directory, preferably in the same directory as the firmware/
   and apps/ directories. This is where all generated files will be written.

   $ cd rockbox
   $ mkdir build
   $ cd build

3. Make sure you have mips/m68k/arm-elf-gcc and siblings in the PATH. Make sure
   that you have 'perl' in your PATH too. Your gcc cross compiler needs to be
   a particular version depending on what player you are compiling for. These
   can be generated using the rockboxdev.sh script in the /tools/ folder of the
   source.

   $ which arm-elf-eabi-gcc
   $ which perl

4. In your build directory, run the 'tools/configure' script and enter what
   target you want to build for and if you want a debug version or not (and a
   few more questions). It'll prompt you. The debug version is for making a
   gdb version out of it. It is only useful if you run gdb towards your target
   Archos.

   $ ../tools/configure

5. *ploink*. Now you have got a Makefile generated for you.

6. Run 'make' and soon the necessary pieces from the firmware and the apps
   directories have been compiled, linked and scrambled for you.

   $ make
   $ make zip

7. unzip the rockbox.zip on your music player, reboot it and
   *smile*.

If you want to build for more than one target, just create several build
directories and create a setup for each target:

   $ mkdir build-fuzeplus
   $ cd build-fuzeplus
   $ ../tools/configure

   $ mkdir build-xduoox3
   $ cd build-xduoox3
   $ ../tools/configure

Questions anyone? Ask on the mailing list or on IRC. We'll be happy to help you!