[PATCH v1 3/4] drm/i915/gvt: add hotplug emulation
hang.yuan at linux.intel.com
hang.yuan at linux.intel.com
Thu Jan 10 11:04:47 UTC 2019
From: Hang Yuan <hang.yuan at linux.intel.com>
Add function to emulate hotplug interrupt for SKL/KBL platforms
Signed-off-by: Hang Yuan <hang.yuan at linux.intel.com>
---
drivers/gpu/drm/i915/gvt/display.c | 30 ++++++++++++++++++++++++++++++
drivers/gpu/drm/i915/gvt/gvt.c | 1 +
drivers/gpu/drm/i915/gvt/gvt.h | 3 +++
3 files changed, 34 insertions(+)
diff --git a/drivers/gpu/drm/i915/gvt/display.c b/drivers/gpu/drm/i915/gvt/display.c
index 6a86fac..035479e 100644
--- a/drivers/gpu/drm/i915/gvt/display.c
+++ b/drivers/gpu/drm/i915/gvt/display.c
@@ -446,6 +446,36 @@ void intel_gvt_emulate_vblank(struct intel_gvt *gvt)
}
/**
+ * 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
*
diff --git a/drivers/gpu/drm/i915/gvt/gvt.c b/drivers/gpu/drm/i915/gvt/gvt.c
index 4e8947f..43f4242 100644
--- a/drivers/gpu/drm/i915/gvt/gvt.c
+++ b/drivers/gpu/drm/i915/gvt/gvt.c
@@ -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)
diff --git a/drivers/gpu/drm/i915/gvt/gvt.h b/drivers/gpu/drm/i915/gvt/gvt.h
index 8a4cf99..0ba4b42 100644
--- a/drivers/gpu/drm/i915/gvt/gvt.h
+++ b/drivers/gpu/drm/i915/gvt/gvt.h
@@ -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);
};
--
2.7.4
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