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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>
hifive-unleashed-5.1
Hang Yuan 2019-01-30 18:25:53 +08:00 committed by Zhenyu Wang
parent 4922078961
commit 1ca20f33df
3 changed files with 34 additions and 0 deletions
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30
drivers/gpu/drm/i915/gvt/display.c
View File

@ -445,6 +445,36 @@ void intel_gvt_emulate_vblank(struct intel_gvt *gvt)
mutex_unlock(&gvt->lock);
}
/**
* intel_vgpu_emulate_hotplug - trigger hotplug event for vGPU
* @vgpu: a vGPU
* @conncted: link state
*
* This function is used to trigger hotplug interrupt for vGPU
*
*/
void intel_vgpu_emulate_hotplug(struct intel_vgpu *vgpu, bool connected)
{
struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
/* TODO: add more platforms support */
if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) {
if (connected) {
vgpu_vreg_t(vgpu, SFUSE_STRAP) |=
SFUSE_STRAP_DDID_DETECTED;
vgpu_vreg_t(vgpu, SDEISR) |= SDE_PORTD_HOTPLUG_CPT;
} else {
vgpu_vreg_t(vgpu, SFUSE_STRAP) &=
~SFUSE_STRAP_DDID_DETECTED;
vgpu_vreg_t(vgpu, SDEISR) &= ~SDE_PORTD_HOTPLUG_CPT;
}
vgpu_vreg_t(vgpu, SDEIIR) |= SDE_PORTD_HOTPLUG_CPT;
vgpu_vreg_t(vgpu, PCH_PORT_HOTPLUG) |=
PORTD_HOTPLUG_STATUS_MASK;
intel_vgpu_trigger_virtual_event(vgpu, DP_D_HOTPLUG);
}
}
/**
* intel_vgpu_clean_display - clean vGPU virtual display emulation
* @vgpu: a vGPU

1
drivers/gpu/drm/i915/gvt/gvt.c
View File

@ -185,6 +185,7 @@ static const struct intel_gvt_ops intel_gvt_ops = {
.vgpu_query_plane = intel_vgpu_query_plane,
.vgpu_get_dmabuf = intel_vgpu_get_dmabuf,
.write_protect_handler = intel_vgpu_page_track_handler,
.emulate_hotplug = intel_vgpu_emulate_hotplug,
};
static void init_device_info(struct intel_gvt *gvt)

3
drivers/gpu/drm/i915/gvt/gvt.h
View File

@ -536,6 +536,8 @@ int intel_vgpu_emulate_cfg_read(struct intel_vgpu *vgpu, unsigned int offset,
int intel_vgpu_emulate_cfg_write(struct intel_vgpu *vgpu, unsigned int offset,
void *p_data, unsigned int bytes);
void intel_vgpu_emulate_hotplug(struct intel_vgpu *vgpu, bool connected);
static inline u64 intel_vgpu_get_bar_gpa(struct intel_vgpu *vgpu, int bar)
{
/* We are 64bit bar. */
@ -577,6 +579,7 @@ struct intel_gvt_ops {
int (*vgpu_get_dmabuf)(struct intel_vgpu *vgpu, unsigned int);
int (*write_protect_handler)(struct intel_vgpu *, u64, void *,
unsigned int);
void (*emulate_hotplug)(struct intel_vgpu *vgpu, bool connected);
};