[Intel-gfx] [PATCH 7/8] drm/i915: Only preserve the BIOS modes if they are the preferred ones

[Chris Wilson]

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/intel_display.c |    9 +++++++++
 drivers/gpu/drm/i915/intel_dp.c      |    1 +
 drivers/gpu/drm/i915/intel_drv.h     |    8 ++++++++
 drivers/gpu/drm/i915/intel_fb.c      |    9 +++++++++
 drivers/gpu/drm/i915/intel_lvds.c    |    1 +
 drivers/gpu/drm/i915/intel_panel.c   |   10 ++++++++++
 6 files changed, 38 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 43e226d..c1d8200 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -9233,6 +9233,15 @@ void intel_connector_attach_encoder(struct intel_connector *connector,
 					  &encoder->base);
 }
 
+bool intel_connector_get_preferred_mode(struct intel_connector *connector,
+					struct drm_display_mode *mode)
+{
+	if (!connector->get_preferred_mode)
+		return false;
+
+	return connector->get_preferred_mode(connector, mode);
+}
+
 /*
  * set vga decode state - true == enable VGA decode
  */
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index c82aed3..c8597d9 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -2922,6 +2922,7 @@ intel_dp_init_connector(struct intel_digital_port *intel_dig_port,
 	}
 
 	if (is_edp(intel_dp)) {
+		intel_connector->get_preferred_mode = intel_connector_get_panel_fixed_mode;
 		intel_panel_init(&intel_connector->panel, fixed_mode);
 		intel_panel_setup_backlight(connector);
 	}
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index a6c0b25..8bd9bf0 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -204,6 +204,9 @@ struct intel_connector {
 	 * and active (i.e. dpms ON state). */
 	bool (*get_hw_state)(struct intel_connector *);
 
+	bool (*get_preferred_mode)(struct intel_connector *,
+				   struct drm_display_mode *);
+
 	/* Panel info for eDP and LVDS */
 	struct intel_panel panel;
 
@@ -505,6 +508,9 @@ extern int intel_panel_init(struct intel_panel *panel,
 			    struct drm_display_mode *fixed_mode);
 extern void intel_panel_fini(struct intel_panel *panel);
 
+extern bool intel_connector_get_panel_fixed_mode(struct intel_connector *connector,
+						 struct drm_display_mode *mode);
+
 extern void intel_fixed_panel_mode(struct drm_display_mode *fixed_mode,
 				   struct drm_display_mode *adjusted_mode);
 extern void intel_pch_panel_fitting(struct drm_device *dev,
@@ -576,6 +582,8 @@ hdmi_to_dig_port(struct intel_hdmi *intel_hdmi)
 bool ibx_digital_port_connected(struct drm_i915_private *dev_priv,
 				struct intel_digital_port *port);
 
+extern bool intel_connector_get_preferred_mode(struct intel_connector *connector,
+					       struct drm_display_mode *mode);
 extern void intel_connector_attach_encoder(struct intel_connector *connector,
 					   struct intel_encoder *encoder);
 extern struct drm_encoder *intel_best_encoder(struct drm_connector *connector);
diff --git a/drivers/gpu/drm/i915/intel_fb.c b/drivers/gpu/drm/i915/intel_fb.c
index ca6c8e6..32bc904 100644
--- a/drivers/gpu/drm/i915/intel_fb.c
+++ b/drivers/gpu/drm/i915/intel_fb.c
@@ -237,6 +237,7 @@ static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper,
 	for (i = 0; i < fb_helper->connector_count; i++) {
 		struct drm_connector *connector;
 		struct drm_encoder *encoder;
+		struct drm_display_mode mode;
 
 		connector = fb_helper->connector_info[i]->connector;
 		if (!enabled[i]) {
@@ -266,6 +267,14 @@ static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper,
 			return false;
 		}
 
+		if (intel_connector_get_preferred_mode(to_intel_connector(connector), &mode) &&
+		    !drm_mode_equal(&mode, &encoder->crtc->mode)) {
+			DRM_DEBUG_KMS("connector %s on crtc %d has an non-native mode, aborting\n",
+				      drm_get_connector_name(connector),
+				      encoder->crtc->base.id);
+			return false;
+		}
+
 		modes[i] = &encoder->crtc->mode;
 		crtcs[i] = intel_fb_helper_crtc(fb_helper, encoder->crtc);
 
diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
index 3da1b2a..9f4381e 100644
--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -1134,6 +1134,7 @@ bool intel_lvds_init(struct drm_device *dev)
 	intel_encoder->get_hw_state = intel_lvds_get_hw_state;
 	intel_encoder->get_mode_flags = intel_lvds_get_mode_flags;
 	intel_connector->get_hw_state = intel_connector_get_hw_state;
+	intel_connector->get_preferred_mode = intel_connector_get_panel_fixed_mode;
 
 	intel_connector_attach_encoder(intel_connector, intel_encoder);
 	intel_encoder->type = INTEL_OUTPUT_LVDS;
diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c
index bee8cb6..212e088 100644
--- a/drivers/gpu/drm/i915/intel_panel.c
+++ b/drivers/gpu/drm/i915/intel_panel.c
@@ -35,6 +35,16 @@
 
 #define PCI_LBPC 0xf4 /* legacy/combination backlight modes */
 
+bool intel_connector_get_panel_fixed_mode(struct intel_connector *connector,
+					  struct drm_display_mode *mode)
+{
+	if (!connector->panel.fixed_mode)
+		return false;
+
+	*mode = *connector->panel.fixed_mode;
+	return true;
+}
+
 void
 intel_fixed_panel_mode(struct drm_display_mode *fixed_mode,
 		       struct drm_display_mode *adjusted_mode)
-- 
1.7.10.4