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drm/i915: Allow calling intel_adjust_tile_offset() multiple times

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Minimize the resulting X coordinate after intel_adjust_tile_offset() is
done with it's offset adjustment. This allows calling
intel_adjust_tile_offset() multiple times in case we need to adjust
the offset several times.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1470821001-25272-9-git-send-email-ville.syrjala@linux.intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ville Syrjälä 2016-02-08 18:28:00 +02:00
parent 60d5f2a45b
commit b9b2403845
1 changed files with 5 additions and 0 deletions
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5
drivers/gpu/drm/i915/intel_display.c
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@ -2330,6 +2330,7 @@ static u32 intel_adjust_tile_offset(int *x, int *y,
u32 old_offset,
u32 new_offset)
{
unsigned int pitch_pixels = pitch_tiles * tile_width;
unsigned int tiles;
WARN_ON(old_offset & (tile_size - 1));
@ -2341,6 +2342,10 @@ static u32 intel_adjust_tile_offset(int *x, int *y,
*y += tiles / pitch_tiles * tile_height;
*x += tiles % pitch_tiles * tile_width;
/* minimize x in case it got needlessly big */
*y += *x / pitch_pixels * tile_height;
*x %= pitch_pixels;
return new_offset;
}