e68bb75109
When copying partial framebuffer regions line by line, there is overhead from multiple memcpy() calls. Optimise video_flush_copy() to detect when entire lines are being copied (damage spans full width) and perform a single memcpy() for the whole region instead of looping line by line. Also invert the early-exit check to reduce nesting. Co-developed-by: Claude <noreply@anthropic.com> Signed-off-by: Simon Glass <simon.glass@canonical.com>