From: Paulo Zanoni <paulo.r.zanoni at intel.com> ... inside hsw_fdi_link_train. Just set the bits we want, everything else is zero. While at it, also POSTING_READ the register before waiting. Signed-off-by: Paulo Zanoni <paulo.r.zanoni at intel.com> --- drivers/gpu/drm/i915/intel_ddi.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c index e903502..0cb6441 100644 --- a/drivers/gpu/drm/i915/intel_ddi.c +++ b/drivers/gpu/drm/i915/intel_ddi.c @@ -188,13 +188,11 @@ void hsw_fdi_link_train(struct drm_crtc *crtc) DP_TP_CTL_ENABLE); /* Configure and enable DDI_BUF_CTL for DDI E with next voltage */ - temp = I915_READ(DDI_BUF_CTL(PORT_E)); - temp = (temp & ~DDI_BUF_EMP_MASK); I915_WRITE(DDI_BUF_CTL(PORT_E), - temp | - DDI_BUF_CTL_ENABLE | - ((intel_crtc->fdi_lanes - 1) << 1) | - hsw_ddi_buf_ctl_values[i]); + DDI_BUF_CTL_ENABLE | + ((intel_crtc->fdi_lanes - 1) << 1) | + hsw_ddi_buf_ctl_values[i]); + POSTING_READ(DDI_BUF_CTL(PORT_E)); udelay(600); -- 1.7.11.4
