From: Andrey Grodzovsky Date: Wed, 12 Sep 2018 20:38:57 +0000 (-0400) Subject: drm/amd/display: Fix pflip IRQ status after gpu reset. X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=c37e2d29f0fbc933508637d7129a8f079b06ab40;p=openwrt%2Fstaging%2Fblogic.git drm/amd/display: Fix pflip IRQ status after gpu reset. Problem: After GPU reset pflip completion IRQ is disabled and hence any subsequent mode set or plane update leads to hang. Fix: Unless acrtc->otg_inst is initialized to -1 during display block initializtion then durng resume from GPU reset amdgpu_irq_gpu_reset_resume_helper will override CRTC 0 pflip IRQ value with whatever value was on every other unused CRTC because dm_irq_state will do irq_source = dal_irq_type + acrtc->otg_inst where acrtc->otg_inst will be 0 for every unused CRTC. Reviewed-by: Harry Wentland Signed-off-by: Andrey Grodzovsky Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index eccae63d3ef1..23ddf54b7dee 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -3424,6 +3424,7 @@ static int amdgpu_dm_crtc_init(struct amdgpu_display_manager *dm, acrtc->crtc_id = crtc_index; acrtc->base.enabled = false; + acrtc->otg_inst = -1; dm->adev->mode_info.crtcs[crtc_index] = acrtc; drm_crtc_enable_color_mgmt(&acrtc->base, MAX_COLOR_LUT_ENTRIES,