drm/amdgpu: save and restore UVD context with suspend and resume

and revert fix following it accordingly

Revert "drm/amdgpu: stop trying to suspend UVD sessions v2"
Revert "drm/amdgpu: fix the UVD suspend sequence order"

Signed-off-by: Leo Liu <leo.liu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index c4a21c6..62a7780 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -1591,6 +1591,7 @@ struct amdgpu_uvd {
        struct amdgpu_bo        *vcpu_bo;
        void                    *cpu_addr;
        uint64_t                gpu_addr;
+       void                    *saved_bo;
        atomic_t                handles[AMDGPU_MAX_UVD_HANDLES];
        struct drm_file         *filp[AMDGPU_MAX_UVD_HANDLES];
        struct delayed_work     idle_work;

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
index c1a5810..4b8ca35 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
@@ -241,32 +241,34 @@ int amdgpu_uvd_sw_fini(struct amdgpu_device *adev)
 
 int amdgpu_uvd_suspend(struct amdgpu_device *adev)
 {
-       struct amdgpu_ring *ring = &adev->uvd.ring;
-       int i, r;
+       unsigned size;
+       void *ptr;
+       const struct common_firmware_header *hdr;
+       int i;
 
        if (adev->uvd.vcpu_bo == NULL)
                return 0;
 
-       for (i = 0; i < AMDGPU_MAX_UVD_HANDLES; ++i) {
-               uint32_t handle = atomic_read(&adev->uvd.handles[i]);
-               if (handle != 0) {
-                       struct fence *fence;
+       for (i = 0; i < AMDGPU_MAX_UVD_HANDLES; ++i)
+               if (atomic_read(&adev->uvd.handles[i]))
+                       break;
 
-                       amdgpu_uvd_note_usage(adev);
+       if (i == AMDGPU_MAX_UVD_HANDLES)
+               return 0;
 
-                       r = amdgpu_uvd_get_destroy_msg(ring, handle, false, &fence);
-                       if (r) {
-                               DRM_ERROR("Error destroying UVD (%d)!\n", r);
-                               continue;
-                       }
+       hdr = (const struct common_firmware_header *)adev->uvd.fw->data;
 
-                       fence_wait(fence, false);
-                       fence_put(fence);
+       size = amdgpu_bo_size(adev->uvd.vcpu_bo);
+       size -= le32_to_cpu(hdr->ucode_size_bytes);
 
-                       adev->uvd.filp[i] = NULL;
-                       atomic_set(&adev->uvd.handles[i], 0);
-               }
-       }
+       ptr = adev->uvd.cpu_addr;
+       ptr += le32_to_cpu(hdr->ucode_size_bytes);
+
+       adev->uvd.saved_bo = kmalloc(size, GFP_KERNEL);
+       if (!adev->uvd.saved_bo)
+               return -ENOMEM;
+
+       memcpy(adev->uvd.saved_bo, ptr, size);
 
        return 0;
 }
@@ -291,7 +293,12 @@ int amdgpu_uvd_resume(struct amdgpu_device *adev)
        ptr = adev->uvd.cpu_addr;
        ptr += le32_to_cpu(hdr->ucode_size_bytes);
 
-       memset(ptr, 0, size);
+       if (adev->uvd.saved_bo != NULL) {
+               memcpy(ptr, adev->uvd.saved_bo, size);
+               kfree(adev->uvd.saved_bo);
+               adev->uvd.saved_bo = NULL;
+       } else
+               memset(ptr, 0, size);
 
        return 0;
 }

diff --git a/drivers/gpu/drm/amd/amdgpu/uvd_v4_2.c b/drivers/gpu/drm/amd/amdgpu/uvd_v4_2.c
index c606ccb..cb46375 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/uvd_v4_2.c
+++ b/drivers/gpu/drm/amd/amdgpu/uvd_v4_2.c
@@ -224,11 +224,11 @@ static int uvd_v4_2_suspend(void *handle)
        int r;
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 
-       r = amdgpu_uvd_suspend(adev);
+       r = uvd_v4_2_hw_fini(adev);
        if (r)
                return r;
 
-       r = uvd_v4_2_hw_fini(adev);
+       r = amdgpu_uvd_suspend(adev);
        if (r)
                return r;
 

diff --git a/drivers/gpu/drm/amd/amdgpu/uvd_v5_0.c b/drivers/gpu/drm/amd/amdgpu/uvd_v5_0.c
index e3c852d..16476d8 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/uvd_v5_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/uvd_v5_0.c
@@ -220,11 +220,11 @@ static int uvd_v5_0_suspend(void *handle)
        int r;
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 
-       r = amdgpu_uvd_suspend(adev);
+       r = uvd_v5_0_hw_fini(adev);
        if (r)
                return r;
 
-       r = uvd_v5_0_hw_fini(adev);
+       r = amdgpu_uvd_suspend(adev);
        if (r)
                return r;
 

diff --git a/drivers/gpu/drm/amd/amdgpu/uvd_v6_0.c b/drivers/gpu/drm/amd/amdgpu/uvd_v6_0.c
index 3375e61..d493791 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/uvd_v6_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/uvd_v6_0.c
@@ -214,15 +214,16 @@ static int uvd_v6_0_suspend(void *handle)
        int r;
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 
+       r = uvd_v6_0_hw_fini(adev);
+       if (r)
+               return r;
+
        /* Skip this for APU for now */
        if (!(adev->flags & AMD_IS_APU)) {
                r = amdgpu_uvd_suspend(adev);
                if (r)
                        return r;
        }
-       r = uvd_v6_0_hw_fini(adev);
-       if (r)
-               return r;
 
        return r;
 }