> -----Original Message-----
> From: arun c [mailto:[EMAIL PROTECTED]
> Sent: Tuesday, July 29, 2008 5:11 PM
> To: Syed Mohammed, Khasim
> Cc: [email protected]
> Subject: Re: Does DSS support 24 bits_per_pixel?
>
> On Tue, Jul 29, 2008 at 4:37 PM, Syed Mohammed, Khasim <[EMAIL PROTECTED]>
> wrote:
> >
> >> Hi all,
> >>
> >> Does omap (2&3) DSS support 24 bit output?
> >>
> >> I was trying to enable DVI support for omap2evm(data lines=24, bits
> >> per pixel =24), I couldn't find
> >> 24 bit support in omapfb driver(git) and omap24xxfb(linux-2.6.14-omap2-v5).
> >>
> >> In TRM its given that it supports 24 BPP. Then why its absent in both
> >> the drivers?. Does the hardware
> >> really support 24 bit format?
> >>
> > Hardware does support RGB 24 packed and unpacked modes.
> >
> > In TI code it is implemented in V4L based Video driver and also in FB
> > driver,
> omap2_disp_config_gfxlayer selects the bpp and configures
> DISPC_GFX_ATTRIBUTES register accordingly.
> >
>
> But in the TI code,
>
> omap24xxfb_check_mode(const struct omap24xxfb_info *oinfo,
> struct fb_var_screeninfo *var)
> {
> u32 pixclock, clkdiv;
> u32 display_xres, display_yres;
> int output_dev = omap2_disp_get_output_dev(OMAP2_GRAPHICS);
>
> omap2_disp_get_panel_size(output_dev, &display_xres, &display_yres);
> if (oinfo->rotation_support) {
>
> if (var->rotate % 90 != 0)
> return -EINVAL;
>
> if (!((var->bits_per_pixel == 8) ||
> (var->bits_per_pixel == 16)))
> return -EINVAL;
>
As this was the last update for OMAP2 platforms, I expect it to have support
for 24 as well. I am downloading the code base to check for the same. In the
latest code for 3530 I have
if (!((var->bits_per_pixel == 8) ||
(var->bits_per_pixel == 16)||
(var->bits_per_pixel == 32))) {
Actually you can even refer to omap3530 code base and port this functionality
to OMAP2.
Regards,
Khasim
http://khasim.blogspot.com
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