[Intel-gfx] [PATCH] drm/i915/display : Remove support for interlace mode

[Ankit Nautiyal]

There are multiple panels with which Interlace mode is seen to cause
flickering (interlacing artifacts) with different platforms.

The issue is seen with both HDMI, DP with CML, CFL, ICL, EHL with
different display models from Acer, Benq, Dell etc.
There are some models where the issue is not seen with same setup.

Due to this, cases where multiple display are configured in clone mode,
sometimes interlaced mode gets picked up in one of the displays
and flickers are seen.

Since its difficult to pin point if issue is due to the HW or due to
panels, removing interlace mode for DP and HDMI till this is
root caused.

Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/8395

Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal at intel.com>
---
 drivers/gpu/drm/i915/display/intel_dp.c   | 3 ---
 drivers/gpu/drm/i915/display/intel_hdmi.c | 3 ---
 2 files changed, 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index f4192fda1a76..78d8ceb590a3 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -5665,9 +5665,6 @@ intel_dp_init_connector(struct intel_digital_port *dig_port,
 	drm_connector_init(dev, connector, &intel_dp_connector_funcs, type);
 	drm_connector_helper_add(connector, &intel_dp_connector_helper_funcs);
 
-	if (!HAS_GMCH(dev_priv) && DISPLAY_VER(dev_priv) < 12)
-		connector->interlace_allowed = true;
-
 	intel_connector->polled = DRM_CONNECTOR_POLL_HPD;
 
 	intel_dp_aux_init(intel_dp);
diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c
index 7ac5e6c5e00d..9b3ea307ef40 100644
--- a/drivers/gpu/drm/i915/display/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/display/intel_hdmi.c
@@ -2998,9 +2998,6 @@ void intel_hdmi_init_connector(struct intel_digital_port *dig_port,
 				    ddc);
 	drm_connector_helper_add(connector, &intel_hdmi_connector_helper_funcs);
 
-	if (DISPLAY_VER(dev_priv) < 12)
-		connector->interlace_allowed = true;
-
 	connector->stereo_allowed = true;
 
 	if (DISPLAY_VER(dev_priv) >= 10)
-- 
2.40.1