For Broadwell, there is one instance of Transcoder MN values per transcoder. For dynamic switching between multiple refreshr rates, M/N values may be reprogrammed on the fly. Link N programming triggers update of all data and link M & N registers and the new M/N values will be used in the next frame that is output. Signed-off-by: Vandana Kannan <vandana.kannan@xxxxxxxxx> Signed-off-by: Pradeep Bhat <pradeep.bhat@xxxxxxxxx> --- drivers/gpu/drm/i915/intel_dp.c | 23 +++++++++++++++++++---- 1 file changed, 19 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 209be3c..183cfd7 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -798,9 +798,15 @@ intel_dp_set_m2_n2(struct intel_crtc *crtc, struct intel_link_m_n *m_n) struct drm_i915_private *dev_priv = dev->dev_private; enum transcoder transcoder = crtc->config.cpu_transcoder; - if (INTEL_INFO(dev)->gen >= 5 && INTEL_INFO(dev)->gen < 8) { + if (INTEL_INFO(dev)->gen >= 8) { + I915_WRITE(PIPE_DATA_M1(transcoder), + TU_SIZE(m_n->tu) | m_n->gmch_m); + I915_WRITE(PIPE_DATA_N1(transcoder), m_n->gmch_n); + I915_WRITE(PIPE_LINK_M1(transcoder), m_n->link_m); + I915_WRITE(PIPE_LINK_N1(transcoder), m_n->link_n); + } else if (INTEL_INFO(dev)->gen >= 5 && INTEL_INFO(dev)->gen < 8) { I915_WRITE(PIPE_DATA_M2(transcoder), - TU_SIZE(m_n->tu) | m_n->gmch_m); + TU_SIZE(m_n->tu) | m_n->gmch_m); I915_WRITE(PIPE_DATA_N2(transcoder), m_n->gmch_n); I915_WRITE(PIPE_LINK_M2(transcoder), m_n->link_m); I915_WRITE(PIPE_LINK_N2(transcoder), m_n->link_n); @@ -3617,8 +3623,17 @@ intel_dp_set_drrs_state(struct drm_device *dev, int refresh_rate) mutex_lock(&intel_dp->drrs_state.mutex); - /* Haswell and below */ - if (INTEL_INFO(dev)->gen >= 5 && INTEL_INFO(dev)->gen < 8) { + if (INTEL_INFO(dev)->gen >= 8) { + switch (index) { + case DRRS_HIGH_RR: + intel_dp_set_m2_n2(intel_crtc, &config->dp_m_n); + break; + case DRRS_LOW_RR: + intel_dp_set_m2_n2(intel_crtc, &config->dp_m2_n2); + break; + }; + } else if (INTEL_INFO(dev)->gen >= 5 && INTEL_INFO(dev)->gen < 8) { + /* Haswell and below */ reg = PIPECONF(intel_crtc->config.cpu_transcoder); val = I915_READ(reg); if (index > DRRS_HIGH_RR) { -- 1.7.9.5 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx