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drm/amdgpu: Reserve discovery TMR only if needed

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For legacy SOCs, discovery binary is sideloaded. Instead of checking for
binary blob, use a flag to determine if discovery region needs to be
reserved.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Lijo Lazar
2025-10-10 17:23:33 +05:30
committed by Alex Deucher
parent 80e462c5b1
commit 071bba9624
3 changed files with 19 additions and 14 deletions
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22
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
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@@ -1769,18 +1769,14 @@ static int amdgpu_ttm_reserve_tmr(struct amdgpu_device *adev)
ctx->init = PSP_MEM_TRAIN_RESERVE_SUCCESS;
}
if (!adev->gmc.is_app_apu) {
ret = amdgpu_bo_create_kernel_at(
adev, adev->gmc.real_vram_size - reserve_size,
reserve_size, &adev->mman.fw_reserved_memory, NULL);
if (ret) {
dev_err(adev->dev, "alloc tmr failed(%d)!\n", ret);
amdgpu_bo_free_kernel(&adev->mman.fw_reserved_memory,
NULL, NULL);
return ret;
}
} else {
DRM_DEBUG_DRIVER("backdoor fw loading path for PSP TMR, no reservation needed\n");
ret = amdgpu_bo_create_kernel_at(
adev, adev->gmc.real_vram_size - reserve_size, reserve_size,
&adev->mman.fw_reserved_memory, NULL);
if (ret) {
dev_err(adev->dev, "alloc tmr failed(%d)!\n", ret);
amdgpu_bo_free_kernel(&adev->mman.fw_reserved_memory, NULL,
NULL);
return ret;
}
return 0;
@@ -1957,7 +1953,7 @@ int amdgpu_ttm_init(struct amdgpu_device *adev)
* If IP discovery enabled, a block of memory should be
* reserved for IP discovey.
*/
if (adev->discovery.bin) {
if (adev->discovery.reserve_tmr) {
r = amdgpu_ttm_reserve_tmr(adev);
if (r)
return r;