PIPEDSL
while (intel_de_read(display, PIPEDSL(display, pipe)) >= vactive)
while ((dsl = intel_de_read(display, PIPEDSL(display, pipe))) <= vsample)
} while ((intel_de_read(display, PIPEDSL(display, pipe)) == dsl));
PIPEDSL(display, crtc->pipe));
position = intel_de_read_fw(display, PIPEDSL(display, pipe)) & PIPEDSL_LINE_MASK;
PIPEDSL(display, pipe)) & PIPEDSL_LINE_MASK;
i915_reg_t reg = PIPEDSL(display, pipe);
MMIO_D(PIPEDSL(display, PIPE_A));
MMIO_D(PIPEDSL(display, PIPE_B));
MMIO_D(PIPEDSL(display, PIPE_C));
MMIO_D(PIPEDSL(display, _PIPE_EDP));