[PATCH 4/4] drm/amdgpu: Disable gfx off if VCN is busy

[Quan, Evan]

Reviewed-by: Evan Quan <evan.quan at amd.com>

________________________________
From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> on behalf of Rex Zhu <rex.zhu at amd.com>
Sent: Sunday, July 29, 2018 7:35:50 PM
To: amd-gfx at lists.freedesktop.org
Cc: Zhu, Rex
Subject: [PATCH 4/4] drm/amdgpu: Disable gfx off if VCN is busy

this patch is a workaround for the gpu hang
at video end time if play video with gfx off enabled.

Signed-off-by: Rex Zhu <Rex.Zhu at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c
index 798648a..d68039f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c
@@ -214,6 +214,7 @@ static void amdgpu_vcn_idle_work_handler(struct work_struct *work)
         fences += amdgpu_fence_count_emitted(&adev->vcn.ring_jpeg);

         if (fences == 0) {
+               amdgpu_gfx_off_ctrl(adev, AMD_IP_BLOCK_TYPE_VCN, true);
                 if (adev->pm.dpm_enabled)
                         amdgpu_dpm_enable_uvd(adev, false);
                 else
@@ -230,6 +231,7 @@ void amdgpu_vcn_ring_begin_use(struct amdgpu_ring *ring)
         bool set_clocks = !cancel_delayed_work_sync(&adev->vcn.idle_work);

         if (set_clocks) {
+               amdgpu_gfx_off_ctrl(adev, AMD_IP_BLOCK_TYPE_VCN, false);
                 if (adev->pm.dpm_enabled)
                         amdgpu_dpm_enable_uvd(adev, true);
                 else
--
1.9.1

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