Re: [Qemu-devel] [PATCH] sm501: Update screen on frame buffer address change

[David Gibson]

On Mon, Jul 09, 2018 at 07:02:36PM +0200, BALATON Zoltan wrote:
> When the guest changes the address of the frame buffer we need to
> refresh the screen to correctly display the new content. This fixes
> display update problems when changing between screens on AmigaOS.
> 
> Signed-off-by: BALATON Zoltan <address@hidden>
> ---
> This fixes an annoying refresh problem in AmigaOS when changing or
> moving screens. The user could work around it by moving the mouse to
> repaint the screen but if it's possible to get this in before or
> during the freeze that could avoid this problem in the release.
> 
>  hw/display/sm501.c | 2 ++
>  1 file changed, 2 insertions(+)

Looks like a clear bugfix, so I've applied to ppc-for-3.0.

> 
> diff --git a/hw/display/sm501.c b/hw/display/sm501.c
> index 3661a89..9ab29d3 100644
> --- a/hw/display/sm501.c
> +++ b/hw/display/sm501.c
> @@ -1235,6 +1235,7 @@ static void sm501_disp_ctrl_write(void *opaque, hwaddr 
> addr,
>          if (value & 0x8000000) {
>              qemu_log_mask(LOG_UNIMP, "Panel external memory not 
> supported\n");
>          }
> +        s->do_full_update = true;
>          break;
>      case SM501_DC_PANEL_FB_OFFSET:
>          s->dc_panel_fb_offset = value & 0x3FF03FF0;
> @@ -1298,6 +1299,7 @@ static void sm501_disp_ctrl_write(void *opaque, hwaddr 
> addr,
>          if (value & 0x8000000) {
>              qemu_log_mask(LOG_UNIMP, "CRT external memory not supported\n");
>          }
> +        s->do_full_update = true;
>          break;
>      case SM501_DC_CRT_FB_OFFSET:
>          s->dc_crt_fb_offset = value & 0x3FF03FF0;

-- 
David Gibson                    | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au  | minimalist, thank you.  NOT _the_ _other_
                                | _way_ _around_!
http://www.ozlabs.org/~dgibson

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