On 6/5/26 17:39, BALATON Zoltan wrote:
From: Chad Jablonski
This fixes three bugs with the ati_set_dirty address calculation.
First, vbe_start_addr is a word offset. All other values in the
calculation are byte offsets. It must be converted to bytes.
Second, when setting the dirty region with memory_region_set_dirty
the vbe_start_addr is used to calculate the start of the dirty region.
This is a problem because the vbe_start_addr is the offset at which scan out
begins. This puts it in the visible screen coordinate system. The dirty
region however is in the virtual screen coordinate system. This can cause both
overmarking and missed updates. This is removed from the calculation.
Third, when the start address of a blit is outside of the bounds check
the entire blit is missed and not set to dirty. This happens even if the
blit does partially overlap with the visible screen. The fix here is to
find the intersection of the visible screen and the blit and mark only
that region as dirty.
This does not attempt to apply clipping to the blit. So there will be
overmarking in some cases.
Signed-off-by: Chad Jablonski
[balaton: drop excess parenthesis, use offsets instead of pointers]
Reviewed-by: BALATON Zoltan
Tested-by: BALATON Zoltan
Signed-off-by: BALATON Zoltan
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Queued, thanks.
