From: Ville Syrjälä <ville.syrj...@linux.intel.com> Reject interlaced modes on VLV/CHV DP outputs. This simply does not work correctly in the hardware. We do get some output, but it's quite corrupted.
The available documentation fails to mention this fact. I contacted some hardware people who eventually managed to locate the relevant HSD for VLV, which was resolved by declaring interlaced DP output as not supported. The HSD was never cloned for CHV even though it inherited most of the hardware and thus has the same problems with interlaced DP output. Cc: Dennis Vshivkov <awesome.walrus+bugzi...@gmail.com> Reported-by: Dennis Vshivkov <awesome.walrus+bugzi...@gmail.com> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=103922 Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com> --- drivers/gpu/drm/i915/intel_dp.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 957735c0b4c6..61cde5cd04d3 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -1677,6 +1677,10 @@ intel_dp_compute_config(struct intel_encoder *encoder, conn_state->scaling_mode); } + if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) && + adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE) + return false; + if (adjusted_mode->flags & DRM_MODE_FLAG_DBLCLK) return false; @@ -6083,7 +6087,8 @@ intel_dp_init_connector(struct intel_digital_port *intel_dig_port, drm_connector_init(dev, connector, &intel_dp_connector_funcs, type); drm_connector_helper_add(connector, &intel_dp_connector_helper_funcs); - connector->interlace_allowed = true; + if (!IS_VALLEYVIEW(dev_priv) && !IS_CHERRYVIEW(dev_priv)) + connector->interlace_allowed = true; connector->doublescan_allowed = 0; intel_dp_init_connector_port_info(intel_dig_port); -- 2.13.6 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx
