drm/amdgpu: convert ptl_hw_supported to enum

Convert ptl_hw_supported to enum with three states:
- AMDGPU_PTL_HW_UNINIT: not yet initialized
- AMDGPU_PTL_HW_SUPPORTED: initialized and supported
- AMDGPU_PTL_HW_NOT_SUPPORTED: initialized and not supported

This allows skipping PTL initialization attempts when hardware is
known to not support it, avoiding repeated initialization failures
after GPU resets.

v2:move ptl_hw_supported_state to AMDGPU_PTL_HW_NOT_SUPPORTED regardless
of error code during first time initialization. Print init fail log when
error code is not EOPNOTSUPP.

Signed-off-by: Victor Zhao <Victor.Zhao@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 8 insertions, 1 deletions

diff --git a/drivers/gpu/drm/amd/include/amdgpu_ptl.h b/drivers/gpu/drm/amd/include/amdgpu_ptl.h
index 154b8da3bfa9..eead62b4b327 100644
--- a/drivers/gpu/drm/amd/include/amdgpu_ptl.h
+++ b/drivers/gpu/drm/amd/include/amdgpu_ptl.h
@@ -39,11 +39,18 @@ enum amdgpu_ptl_disable_source {
 	AMDGPU_PTL_DISABLE_PROFILER,
 	AMDGPU_PTL_DISABLE_MAX,
 };
+
+enum amdgpu_ptl_hw_supported_state {
+	AMDGPU_PTL_HW_UNINIT = 0,       /* Not yet initialized */
+	AMDGPU_PTL_HW_SUPPORTED,        /* Initialized and supported */
+	AMDGPU_PTL_HW_NOT_SUPPORTED,    /* Initialized and not supported */
+};
+
 struct amdgpu_ptl {
 	enum amdgpu_ptl_fmt		fmt1;
 	enum amdgpu_ptl_fmt		fmt2;
 	bool				enabled;
-	bool				hw_supported;
+	enum amdgpu_ptl_hw_supported_state hw_supported_state;
 	bool				permanently_disabled;
 	/* PTL disable reference counting */
 	atomic_t			disable_ref;