On Wed, Dec 31, 2008 at 8:16 PM, Yauhen Kharuzhy [off-list ref] wrote:

On Tue, Dec 30, 2008 at 11:56:22PM +0800, Jaya Kumar wrote:

quoted

Hi Yauhen,

My apologies for the delay in replying. As you can imagine, life is
busy at Christmas and New Year and trying to clean out my patch box.
Yes, I will be happy to help in any way that I can. I think it is
great that you're doing the work to get the prs-505 supported. I
unfortunately have no documentation that I can pass along but will be
happy to take a look at any code.

Ok, in response to the technical questions, can you please post the
code for the board driver here. For the other people who also asked
similar questions about broadsheet and other controllers, please post
your questions and code here on the mailing list rather than to me
alone. The fbdev mailing list is the right place for all of us to work
together on this.

OK. I am sorry for my impatience.

No, no, you musn't apologize. I know I am slow, especially in
answering hard questions. :-) I will try to do better. It is one of my
resolutions for 2009.

I just wrote a "new style" (for 2.6.28 kernel) board driver using of
the existing imxfb driver similar to you am200epd board driver. I found two
problems:
1) the metronomefb driver initializes before imxfb driver and a
kernel Oops caused in the setup_fb() function because the board.host_fbinfo is not
initialized yet. For prevent this, I placed a call of my prs505_presetup_fb()
function immediately after the fb_register_client() call.

Okay, I think I understand what you're saying and yes, that sounds
like a reasonable solution.

2) the LCD controller in IMX SoCs supports LCD panels with height <= 511 (9 bit in
LCD_SIZE register). In the original Sony driver this height is 312. As I
suppose, it is half of the real height because LCD controller uses 16 bit
per pixel. I set yres in my prs505_fb_info to 622 / 2.

This sounds familiar to me. There's also an alignment restriction on
the the X width which I think I had to deal with on pxa255 because
LCCR1 required 16bpp and a minimum 32-pixel alignment which meant 416
=> 832. Are you having to do the same there or does iMX handle this
differently?

Now metronomefb initializes but nothing happen on the screen.

Ok, does this mean the ready signal not reasserting is solved?

I attached my board driver.
Sony driver, if needed, can be found here:
http://users.openinkpot.org/~jekhor/8track20070714.tgz

Ok, I will look at both of this.

Thanks,
jaya

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