On Tue, Jul 29, 2008 at 5:25 PM, Syed Mohammed, Khasim <khasim@xxxxxx> wrote: > > >> -----Original Message----- >> From: arun c [mailto:arun.edarath@xxxxxxxxx] >> Sent: Tuesday, July 29, 2008 5:11 PM >> To: Syed Mohammed, Khasim >> Cc: linux-omap@xxxxxxxxxxxxxxx >> Subject: Re: Does DSS support 24 bits_per_pixel? >> >> On Tue, Jul 29, 2008 at 4:37 PM, Syed Mohammed, Khasim <khasim@xxxxxx> 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. > Yes DVI worked for me, needed some minor changes to omapfb driver though. I used 24 bits unpacked mode. Thanks Khasim for the help. > Regards, > Khasim > http://khasim.blogspot.com > > -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
