Re: [Qemu-devel] [PATCH v3 8/9] sm501: Perform a full update after palette change

[David Gibson <david@gibson.dropbear.id.au>]

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On Thu, Jun 14, 2018 at 02:17:00AM +0200, BALATON Zoltan wrote:
> From: Sebastian Bauer <mail@sebastianbauer.info>
> 
> Signed-off-by: Sebastian Bauer <mail@sebastianbauer.info>
> Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>

Commit message.  Why is this necessary?

> ---
>  hw/display/sm501.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/hw/display/sm501.c b/hw/display/sm501.c
> index 0625cf5..a2ee6e3 100644
> --- a/hw/display/sm501.c
> +++ b/hw/display/sm501.c
> @@ -479,6 +479,7 @@ typedef struct SM501State {
>      MemoryRegion twoD_engine_region;
>      uint32_t last_width;
>      uint32_t last_height;
> +    uint32_t do_full_update; /* perform a full update next time */
>      I2CBus *i2c_bus;
>  
>      /* mmio registers */
> @@ -1032,6 +1033,7 @@ static void sm501_palette_write(void *opaque, hwaddr addr,
>  
>      assert(range_covers_byte(0, 0x400 * 3, addr));
>      *(uint32_t *)&s->dc_palette[addr] = value;
> +    s->do_full_update = 1;
>  }
>  
>  static uint64_t sm501_disp_ctrl_read(void *opaque, hwaddr addr,
> @@ -1620,6 +1622,12 @@ static void sm501_update_display(void *opaque)
>          full_update = 1;
>      }
>  
> +    /* someone else requested a full update */
> +    if (s->do_full_update) {
> +        s->do_full_update = 0;
> +        full_update = 1;
> +    }
> +
>      /* draw each line according to conditions */
>      snap = memory_region_snapshot_and_clear_dirty(&s->local_mem_region,
>                offset, width * height * src_bpp, DIRTY_MEMORY_VGA);

-- 
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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