drm/i915/dp: allow configuring eDP panel fitting scaling mode

LVDS allowed changing panel fitting scaling mode, while eDP didn't. Copied
relevant code from LVDS to eDP.

Signed-off-by: Yuly Novikov <ynovikov@chromium.org>
[Jani: use fitting mode in intel_panel, remove default mode change]
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Tested-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 30 insertions, 1 deletions

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 2cce6bc755e5..b475eb9ffc63 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -693,7 +693,8 @@ intel_dp_mode_fixup(struct drm_encoder *encoder,
         if (is_edp(intel_dp) && intel_connector->panel.fixed_mode) {
                 intel_fixed_panel_mode(intel_connector->panel.fixed_mode,
                                        adjusted_mode);
-                intel_pch_panel_fitting(dev, DRM_MODE_SCALE_FULLSCREEN,
+                intel_pch_panel_fitting(dev,
+                                        intel_connector->panel.fitting_mode,
                                         mode, adjusted_mode);
         }
 
@@ -2359,6 +2360,7 @@ intel_dp_set_property(struct drm_connector *connector,
                       uint64_t val)
 {
         struct drm_i915_private *dev_priv = connector->dev->dev_private;
+        struct intel_connector *intel_connector = to_intel_connector(connector);
         struct intel_dp *intel_dp = intel_attached_dp(connector);
         int ret;
 
@@ -2395,6 +2397,22 @@ intel_dp_set_property(struct drm_connector *connector,
                 goto done;
         }
 
+        if (is_edp(intel_dp) &&
+            property == connector->dev->mode_config.scaling_mode_property) {
+                if (val == DRM_MODE_SCALE_NONE) {
+                        DRM_DEBUG_KMS("no scaling not supported\n");
+                        return -EINVAL;
+                }
+
+                if (intel_connector->panel.fitting_mode == val) {
+                        /* the eDP scaling property is not changed */
+                        return 0;
+                }
+                intel_connector->panel.fitting_mode = val;
+
+                goto done;
+        }
+
         return -EINVAL;
 
 done:
@@ -2519,8 +2537,19 @@ bool intel_dpd_is_edp(struct drm_device *dev)
 static void
 intel_dp_add_properties(struct intel_dp *intel_dp, struct drm_connector *connector)
 {
+        struct intel_connector *intel_connector = to_intel_connector(connector);
+
         intel_attach_force_audio_property(connector);
         intel_attach_broadcast_rgb_property(connector);
+
+        if (is_edp(intel_dp)) {
+                drm_mode_create_scaling_mode_property(connector->dev);
+                drm_connector_attach_property(
+                        connector,
+                        connector->dev->mode_config.scaling_mode_property,
+                        DRM_MODE_SCALE_FULLSCREEN);
+                intel_connector->panel.fitting_mode = DRM_MODE_SCALE_FULLSCREEN;
+        }
 }
 
 static void