[Skyeye-developer] LCD simulation for device at91rm9200 device.

[Anthony Lee]

Hi Arnab,

How dev_lcd_s3c2410 work:

1. Linux kernel do the following works.
    1) kmalloc buffer for frame buffer.
    2) register fb driver.
    3) write something to LCD controller registers to turn LCD on.
    4) doing something by application.

2. SkyEye do the following works:
    1) initalize everything by parsing "skyeye.conf"
    2) start to parsing instruct from binary...
    3) cycling and parsing instruct... (contains step 6)
    4) whether something need to write to LCD controller registers ?
            => yes => call "lcd_s3c2410_write_word(...)", goto step 5
            => no => goto step 3
    5) setup width/height/depth/lcd_addr for LCD device framework.
then goto step 3.
    6) cycling of GTK/Win32/BeOS LCD implementation update the
contents from memory.
    7) goto step 3


2007/4/13, Arnab Som <arnabsom at gmail.com>:
> > But i need the changes on the linux kernel device side. may be if u can
> send
> > me the patch for linux kernel for s3c2410 device , i can map it for
> > at91rm9200 device.
>
>
> I meant u are calling the lcd_s3c2410_write_word(.......)
> from the linux kernel
> right
> Basically the frame buffer is getting filled by the Linux kernel and passsed
> to this function
> Tell me if i am wrong
> Arnab
>
>
> On 4/13/07, Anthony Lee <don.anthony.lee+program at gmail.com>
> wrote:
> >
> > Hi Arnab,
> >
> > > As i understood the three files for the lcd functions are
> > > skyeye_lcd.c
> > > skyeye_lcd_gtk.c
> > > dev_lcd_at91rm92.c (i created )
> >
> > It's recommended to add new LCD controller simulation like below:
> > (for example, Epson S1D13506)
> >
> > 1. create your implementation:
> > (lookup-table dependable simulation according to "dev_lcd_s3c44b0x.c",
> > true-color simulation according to "dev_lcd_s3c2410.c")
> >
> > device/lcd/dev_lcd_s1d13506.c
> > device/lcd/dev_lcd_s1d13506.h
> >
> > 2. add "lcd_*_init" function to "lcd_int" in "device/lcd/skyeye_lcd.c"
> like:
> > static void
> > lcd_init (struct device_module_set *mod_set)
> > {
> >         ...
> >         ...
> >         lcd_s1d13506_init (mod_set);
> > }
> >
> > 3. modify "Makefile" like:
> > SIM_LCD_OBJS =  ... binary/dev_lcd_s1d13506.o
> >
> > 4. modify your skyeye.conf like:
> > ....
> > lcd: type=s1d13506
> >
> >
> > BTW, I'd clean-up the lcd device framework,
> > maybe you should update your source of SkyEye from SVN.
> >
> >
> > > But i need the changes on the linux kernel device side. may be if u can
> send
> > > me the patch for linux kernel for s3c2410 device , i can map it for
> > > at91rm9200 device.
> >
> > I don't know how to do that. :)
> >
> >
> > 2007/4/13, Arnab Som <arnabsom at gmail.com >:
> > > Hi Anthony,
> > >                     yes i am trying to write a seperate controller for
> the
> > > at91rm9200 and the init function can be added in the lcd_init()
> > > function of skyeye_lcd.c file.
> > > As i understood the three files for the lcd functions are
> > > skyeye_lcd.c
> > > skyeye_lcd_gtk.c
> > > dev_lcd_at91rm92.c (i created )
> > >
> > > The at91rm9200  controller i crreated on the likes of s3c2410
> controller.
> > > But i need the changes on the linux kernel device side. may be if u can
> send
> > > me the patch for linux kernel for s3c2410 device , i can map it for
> > > at91rm9200 device.
> > > Regards
> > > Arnab
> > >
> > >
> > > On 4/13/07, Anthony Lee
> <don.anthony.lee+program at gmail.com>
> > > wrote:
> > > > Hi Arnab,
> > > >
> > > > AT91RM9200 has no LCD controller.
> > > >
> > > > By the way, you can implement it via extended LCD
> > > > controller (such as S1D13506, etc.) according to existence
> > > > implemented codes of SkyEye.
> > > >
> > > >
> > > > - Thanks.
> > > > - Anthony Lee
> > > >
> > > > 2007/4/12, Arnab Som <arnabsom at gmail.com >:
> > > > > Hi,
> > > > >       I don't who is handling the at91rm9200 device simulation in
> skyeye
> > > ,
> > > > > but i am trying to activate the lcd in the device and have plans to
> > > write a
> > > > > small keypad driver as well.
> > > > > I am new to skyeye so need some help.
> > > > > Can anybody please send me the necessary pathches for LCD activation
> and
> > > > > also the patches put for the at91rm9200 device in testsuite2.
> > > > > I will try to use the same patch in 2.6.20.4 kernel and do the
> necessary
> > > > > changes.
> > > > > Help is appreciated
> > > > > Regards
> > > > > Arnab
> > > > >
> > > > >
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