Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 1ca20f33 authored by Hang Yuan's avatar Hang Yuan Committed by Zhenyu Wang
Browse files

drm/i915/gvt: add hotplug emulation 



Add function to emulate hotplug interrupt for SKL/KBL platforms

Signed-off-by: default avatarHang Yuan <hang.yuan@linux.intel.com>
Signed-off-by: default avatarZhenyu Wang <zhenyuw@linux.intel.com>
parent 49220789

drivers/gpu/drm/i915/gvt/display.c

+30 −0
Original line number Diff line number Diff line
@@ -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

drivers/gpu/drm/i915/gvt/gvt.c

+1 −0
Original line number Diff line number Diff line
@@ -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)

drivers/gpu/drm/i915/gvt/gvt.h

+3 −0
Original line number Diff line number Diff line
@@ -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);

};