[PATCH 3/4] ARM i.MX28 tx28: use a fixed framebuffer address
Juergen Beisert
jbe at pengutronix.de
Mon Jan 17 05:59:31 EST 2011
Sascha Hauer wrote:
> Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
> ---
> arch/arm/boards/karo-tx28/tx28-stk5.c | 12 ++++++++++++
> 1 files changed, 12 insertions(+), 0 deletions(-)
>
> diff --git a/arch/arm/boards/karo-tx28/tx28-stk5.c
> b/arch/arm/boards/karo-tx28/tx28-stk5.c index 6de41f7..adad8b9 100644
> --- a/arch/arm/boards/karo-tx28/tx28-stk5.c
> +++ b/arch/arm/boards/karo-tx28/tx28-stk5.c
> @@ -19,11 +19,13 @@
> #include <errno.h>
> #include <mci.h>
> #include <fec.h>
> +#include <sizes.h>
> #include <asm/io.h>
> #include <mach/imx-regs.h>
> #include <mach/clock.h>
> #include <mach/mci.h>
> #include <mach/fb.h>
> +#include <asm/sections.h>
>
> static struct stm_mci_platform_data mci_pdata = {
> .caps = MMC_MODE_4BIT | MMC_MODE_HS | MMC_MODE_HS_52MHz,
> @@ -181,11 +183,15 @@ static struct fb_videomode tx28evk_vmodes[] = {
> },
> };
>
> +#define MAX_FB_SIZE SZ_2M
> +
> static struct imx_fb_videomode imxfb_mode = {
> .mode_list = tx28evk_vmodes,
> .mode_cnt = ARRAY_SIZE(tx28evk_vmodes),
> .dotclk_delay = 0, /* no adaption required */
> .ld_intf_width = STMLCDIF_24BIT, /* full 24 bit */
> + .fixed_screen = (void *)(0x40000000 + SZ_128M - MAX_FB_SIZE),
> + .fixed_screen_size = MAX_FB_SIZE,
> };
Question only: Any idea how we could make this setup (base address and size of
the fixed screen) a runtime feature? This would be a nice feature like most
modern BIOS also have: Make the size of the video memory shared with the CPU
selectable at runtime.
jbe
--
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