Skip to content

Commit

Permalink
drm/i915/gvt: add hotplug emulation
Browse files Browse the repository at this point in the history
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>
  • Loading branch information
Hang Yuan authored and Zhenyu Wang committed Jan 31, 2019
1 parent 4922078 commit 1ca20f3
Show file tree
Hide file tree
Showing 3 changed files with 34 additions and 0 deletions.
30 changes: 30 additions & 0 deletions drivers/gpu/drm/i915/gvt/display.c
Original file line number Diff line number Diff line change
Expand Up @@ -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
Expand Down
1 change: 1 addition & 0 deletions drivers/gpu/drm/i915/gvt/gvt.c
Original file line number Diff line number Diff line change
Expand Up @@ -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)
Expand Down
3 changes: 3 additions & 0 deletions drivers/gpu/drm/i915/gvt/gvt.h
Original file line number Diff line number Diff line change
Expand Up @@ -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. */
Expand Down Expand Up @@ -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);
};


Expand Down

0 comments on commit 1ca20f3

Please sign in to comment.