[PATCH] drm/i915/dp: Do not prune the preferred mode on the panel

* [PATCH] drm/i915/dp: Do not prune the preferred mode on the panel
@ 2017-09-29  0:01 Manasi Navare
  2017-09-29  0:19 ` ✗ Fi.CI.BAT: warning for " Patchwork
  0 siblings, 1 reply; 2+ messages in thread
From: Manasi Navare @ 2017-09-29  0:01 UTC (permalink / raw)
  To: intel-gfx; +Cc: Daniel Vetter

During the mode validation, we should never prune the
preferred mode that is the native mode of the eDP panel.
This can result into no modes being available for the eDP
connector.

Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
---
 drivers/gpu/drm/i915/intel_dp.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 90e756c..621eb4d 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -405,6 +405,9 @@ intel_dp_mode_valid(struct drm_connector *connector,
 	max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
 	mode_rate = intel_dp_link_required(target_clock, 18);
 
+	if (intel_dp_is_edp(intel_dp) && (mode->type & DRM_MODE_TYPE_PREFERRED))
+		return MODE_OK;
+
 	if (mode_rate > max_rate || target_clock > max_dotclk)
 		return MODE_CLOCK_HIGH;
 
-- 
2.1.4

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