Hi Alex,

As far as I know, we never tested suspend/resume on the setting you mentioned. Theoretically it should work.

When I read the code now, I was wondering whether we should stop kfd before amdgpu_bo_evict_vram() and amdgpu_fence_driver_suspend(). If that's not needed, it may make more sense to stick to the previous design which kept the kfd suspend/resume inside your IP block suspend/resume.

Regards,

Yong


On 2017-07-06 05:06 PM, Alex Deucher wrote:
On Mon, Jul 3, 2017 at 5:11 PM, Felix Kuehling <felix.kuehl...@amd.com> wrote:
From: Yong Zhao <yong.z...@amd.com>

Signed-off-by: Yong Zhao <yong.z...@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehl...@amd.com>
Does this work properly for multiple GPUs?  E.g., if one is suspended
and another is not?  E.g., PX laptops where we runtime suspend the
dGPU while the APU is still running.

Alex

---
  drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 7 +++++++
  drivers/gpu/drm/amd/amdgpu/cik.c           | 9 +--------
  2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 5b1220f..bc69b9c 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -56,6 +56,8 @@
  #include <linux/firmware.h>
  #include "amdgpu_vf_error.h"

+#include "amdgpu_amdkfd.h"
+
  MODULE_FIRMWARE("amdgpu/vega10_gpu_info.bin");
  MODULE_FIRMWARE("amdgpu/raven_gpu_info.bin");

@@ -2397,6 +2399,8 @@ int amdgpu_device_suspend(struct drm_device *dev, bool 
suspend, bool fbcon)
                 drm_modeset_unlock_all(dev);
         }

+       amdgpu_amdkfd_suspend(adev);
+
         /* unpin the front buffers and cursors */
         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
                 struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
@@ -2537,6 +2541,9 @@ int amdgpu_device_resume(struct drm_device *dev, bool 
resume, bool fbcon)
                         }
                 }
         }
+       r = amdgpu_amdkfd_resume(adev);
+       if (r)
+               return r;

         /* blat the mode back in */
         if (fbcon) {
diff --git a/drivers/gpu/drm/amd/amdgpu/cik.c b/drivers/gpu/drm/amd/amdgpu/cik.c
index 6ce9f80..00639bf 100644
--- a/drivers/gpu/drm/amd/amdgpu/cik.c
+++ b/drivers/gpu/drm/amd/amdgpu/cik.c
@@ -1825,21 +1825,14 @@ static int cik_common_suspend(void *handle)
  {
         struct amdgpu_device *adev = (struct amdgpu_device *)handle;

-       amdgpu_amdkfd_suspend(adev);
-
         return cik_common_hw_fini(adev);
  }

  static int cik_common_resume(void *handle)
  {
-       int r;
         struct amdgpu_device *adev = (struct amdgpu_device *)handle;

-       r = cik_common_hw_init(adev);
-       if (r)
-               return r;
-
-       return amdgpu_amdkfd_resume(adev);
+       return cik_common_hw_init(adev);
  }

  static bool cik_common_is_idle(void *handle)
--
1.9.1

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