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drm/i915/gvt: add hotplug emulation
Add function to emulate hotplug interrupt for SKL/KBL platforms Signed-off-by: Hang Yuan <hang.yuan@linux.intel.com> Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
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3 changed files with 34 additions and 0 deletions
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@ -445,6 +445,36 @@ void intel_gvt_emulate_vblank(struct intel_gvt *gvt)
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mutex_unlock(&gvt->lock);
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}
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/**
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* intel_vgpu_emulate_hotplug - trigger hotplug event for vGPU
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* @vgpu: a vGPU
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* @conncted: link state
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*
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* This function is used to trigger hotplug interrupt for vGPU
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*
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*/
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void intel_vgpu_emulate_hotplug(struct intel_vgpu *vgpu, bool connected)
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{
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struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
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/* TODO: add more platforms support */
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if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) {
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if (connected) {
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vgpu_vreg_t(vgpu, SFUSE_STRAP) |=
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SFUSE_STRAP_DDID_DETECTED;
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vgpu_vreg_t(vgpu, SDEISR) |= SDE_PORTD_HOTPLUG_CPT;
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} else {
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vgpu_vreg_t(vgpu, SFUSE_STRAP) &=
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~SFUSE_STRAP_DDID_DETECTED;
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vgpu_vreg_t(vgpu, SDEISR) &= ~SDE_PORTD_HOTPLUG_CPT;
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}
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vgpu_vreg_t(vgpu, SDEIIR) |= SDE_PORTD_HOTPLUG_CPT;
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vgpu_vreg_t(vgpu, PCH_PORT_HOTPLUG) |=
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PORTD_HOTPLUG_STATUS_MASK;
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intel_vgpu_trigger_virtual_event(vgpu, DP_D_HOTPLUG);
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}
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}
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/**
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* intel_vgpu_clean_display - clean vGPU virtual display emulation
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* @vgpu: a vGPU
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@ -185,6 +185,7 @@ static const struct intel_gvt_ops intel_gvt_ops = {
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.vgpu_query_plane = intel_vgpu_query_plane,
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.vgpu_get_dmabuf = intel_vgpu_get_dmabuf,
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.write_protect_handler = intel_vgpu_page_track_handler,
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.emulate_hotplug = intel_vgpu_emulate_hotplug,
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};
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static void init_device_info(struct intel_gvt *gvt)
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@ -536,6 +536,8 @@ int intel_vgpu_emulate_cfg_read(struct intel_vgpu *vgpu, unsigned int offset,
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int intel_vgpu_emulate_cfg_write(struct intel_vgpu *vgpu, unsigned int offset,
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void *p_data, unsigned int bytes);
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void intel_vgpu_emulate_hotplug(struct intel_vgpu *vgpu, bool connected);
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static inline u64 intel_vgpu_get_bar_gpa(struct intel_vgpu *vgpu, int bar)
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{
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/* We are 64bit bar. */
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@ -577,6 +579,7 @@ struct intel_gvt_ops {
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int (*vgpu_get_dmabuf)(struct intel_vgpu *vgpu, unsigned int);
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int (*write_protect_handler)(struct intel_vgpu *, u64, void *,
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unsigned int);
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void (*emulate_hotplug)(struct intel_vgpu *vgpu, bool connected);
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};
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