[PATCH 1/2] ARM: integrator: move framebuffers to driver

[Linus Walleij]

On Wed, Jul 29, 2015 at 9:38 PM, Russell King - ARM Linux
<linux at arm.linux.org.uk> wrote:
> On Wed, Jul 29, 2015 at 02:27:11PM +0200, Linus Walleij wrote:
>> Commit 11c32d7b6274cb0f554943d65bd4a126c4a86dcd
>> "video: move Versatile CLCD helpers" already moved the
>> CLCD mode setting helpers for Versatile and Integrator/CP
>> to drivers/video/fbdev. Let's do the same for the IM-PD1
>> add-on board, copy the missing displays into the database
>> and simplify the code.
>
> And thereby break the support.  The IM-PD1 CLCD can only access the memory
> on the IM-PD1.  That's why the CLCD driver itself doesn't just allocate
> the frame buffer using dma_alloc_writecombine().  Where the memory comes
> from is platform specific.  In this case...
>
>> -static int impd1fb_clcd_setup(struct clcd_fb *fb)
>> -{
>> -     unsigned long framebase = fb->dev->res.start + 0x01000000;
>> -     unsigned long framesize = SZ_1M;
>
> It's a chunk of SRAM offset by the specified value and of the specified
> size above.

Argh how typical. I need to get one of these PROSPECTOR displays
so I can actually test this stuff. I have tried to get VGA out working with
the IM-PD1 but it just doesn't seem to come up no matter how I
try.

Yours,
Linus Walleij