drm/i915/gvt: set SFUSE_STRAP properly for vitual monitor detection

update the correct virtual montior connection status to vreg

v2: address yulei's comment on commit message

Signed-off-by: Bing Niu <bing.niu@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>

diff --git a/drivers/gpu/drm/i915/gvt/display.c b/drivers/gpu/drm/i915/gvt/display.c
index 43e02e0..5419ae6 100644 (file)
--- a/drivers/gpu/drm/i915/gvt/display.c
+++ b/drivers/gpu/drm/i915/gvt/display.c
@@ -176,14 +176,20 @@ static void emulate_monitor_status_change(struct intel_vgpu *vgpu)
                vgpu_vreg(vgpu, SDEISR) &= ~(SDE_PORTA_HOTPLUG_SPT |
                                SDE_PORTE_HOTPLUG_SPT);
 
-       if (intel_vgpu_has_monitor_on_port(vgpu, PORT_B))
+       if (intel_vgpu_has_monitor_on_port(vgpu, PORT_B)) {
                vgpu_vreg(vgpu, SDEISR) |= SDE_PORTB_HOTPLUG_CPT;
+               vgpu_vreg(vgpu, SFUSE_STRAP) |= SFUSE_STRAP_DDIB_DETECTED;
+       }
 
-       if (intel_vgpu_has_monitor_on_port(vgpu, PORT_C))
+       if (intel_vgpu_has_monitor_on_port(vgpu, PORT_C)) {
                vgpu_vreg(vgpu, SDEISR) |= SDE_PORTC_HOTPLUG_CPT;
+               vgpu_vreg(vgpu, SFUSE_STRAP) |= SFUSE_STRAP_DDIC_DETECTED;
+       }
 
-       if (intel_vgpu_has_monitor_on_port(vgpu, PORT_D))
+       if (intel_vgpu_has_monitor_on_port(vgpu, PORT_D)) {
                vgpu_vreg(vgpu, SDEISR) |= SDE_PORTD_HOTPLUG_CPT;
+               vgpu_vreg(vgpu, SFUSE_STRAP) |= SFUSE_STRAP_DDID_DETECTED;
+       }
 
        if (IS_SKYLAKE(dev_priv) &&
                        intel_vgpu_has_monitor_on_port(vgpu, PORT_E)) {
@@ -196,6 +202,8 @@ static void emulate_monitor_status_change(struct intel_vgpu *vgpu)
                                GEN8_PORT_DP_A_HOTPLUG;
                else
                        vgpu_vreg(vgpu, SDEISR) |= SDE_PORTA_HOTPLUG_SPT;
+
+               vgpu_vreg(vgpu, DDI_BUF_CTL(PORT_A)) |= DDI_INIT_DISPLAY_DETECTED;
        }
 }