Commit 1002d718 authored by Michel Dänzer's avatar Michel Dänzer Committed by Alex Deucher
Browse files

drm/amdgpu/dce8: Re-set VBLANK interrupt state when enabling a CRTC 



Something (ATOM BIOS?) seems to be clobbering the LB_INTERRUPT_MASK
register while the CRTC is off, which caused e.g. glxgears or
gnome-shell to hang after a modeset.

Signed-off-by: default avatarMichel Dänzer <michel.daenzer@amd.com>
Reviewed-by: default avatarJammy Zhou <Jammy.Zhou@amd.com>
parent bda5e3e9

drivers/gpu/drm/amd/amdgpu/dce_v8_0.c

+4 −0
Original line number Diff line number Diff line
@@ -2566,6 +2566,7 @@ static void dce_v8_0_crtc_dpms(struct drm_crtc *crtc, int mode) 
	struct drm_device *dev = crtc->dev;

	struct amdgpu_device *adev = dev->dev_private;

	struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);

	unsigned type;



	switch (mode) {

	case DRM_MODE_DPMS_ON:
@@ -2574,6 +2575,9 @@ static void dce_v8_0_crtc_dpms(struct drm_crtc *crtc, int mode) 
		dce_v8_0_vga_enable(crtc, true);

		amdgpu_atombios_crtc_blank(crtc, ATOM_DISABLE);

		dce_v8_0_vga_enable(crtc, false);

		/* Make sure VBLANK interrupt is still enabled */

		type = amdgpu_crtc_idx_to_irq_type(adev, amdgpu_crtc->crtc_id);

		amdgpu_irq_update(adev, &adev->crtc_irq, type);

		drm_vblank_post_modeset(dev, amdgpu_crtc->crtc_id);

		dce_v8_0_crtc_load_lut(crtc);

		break;

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