On Wed, Nov 29, 2023 at 11:37 AM Ma Jun <jun....@amd.com> wrote:
>
> Some platforms can't resume from d3cold state, So add a
> new module parameter to disable d3cold state for debugging
> purpose or workaround.
Doesn't the runpm parameter already handle this? If you set runpm=0,
that should disable d3cold.
Alex
>
> Signed-off-by: Ma Jun <jun....@amd.com>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu.h | 1 +
> drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 7 +++++++
> drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 8 ++++++++
> 3 files changed, 16 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> index a9f54df9d33e..db9f60790267 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> @@ -166,6 +166,7 @@ extern char
> amdgpu_lockup_timeout[AMDGPU_MAX_TIMEOUT_PARAM_LENGTH];
> extern int amdgpu_dpm;
> extern int amdgpu_fw_load_type;
> extern int amdgpu_aspm;
> +extern int amdgpu_d3cold;
> extern int amdgpu_runtime_pm;
> extern uint amdgpu_ip_block_mask;
> extern int amdgpu_bapm;
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> index 22b6a910b7f2..90501c44e7d0 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> @@ -264,6 +264,13 @@ bool amdgpu_device_supports_px(struct drm_device *dev)
> bool amdgpu_device_supports_boco(struct drm_device *dev)
> {
> struct amdgpu_device *adev = drm_to_adev(dev);
> + struct pci_dev *parent;
> +
> + if (!amdgpu_d3cold) {
> + parent = pcie_find_root_port(adev->pdev);
> + pci_d3cold_disable(parent);
> + return false;
> + }
>
> if (adev->has_pr3 ||
> ((adev->flags & AMD_IS_PX) && amdgpu_is_atpx_hybrid()))
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> index 5f14f04cb553..c9fbb8bd4169 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> @@ -145,6 +145,7 @@ char
> amdgpu_lockup_timeout[AMDGPU_MAX_TIMEOUT_PARAM_LENGTH];
> int amdgpu_dpm = -1;
> int amdgpu_fw_load_type = -1;
> int amdgpu_aspm = -1;
> +int amdgpu_d3cold = -1;
> int amdgpu_runtime_pm = -1;
> uint amdgpu_ip_block_mask = 0xffffffff;
> int amdgpu_bapm = -1;
> @@ -359,6 +360,13 @@ module_param_named(fw_load_type, amdgpu_fw_load_type,
> int, 0444);
> MODULE_PARM_DESC(aspm, "ASPM support (1 = enable, 0 = disable, -1 = auto)");
> module_param_named(aspm, amdgpu_aspm, int, 0444);
>
> +/**
> + * DOC: d3cold (int)
> + * To disable d3cold (1 = enable, 0 = disable). The default is -1 (auto,
> enabled).
> + */
> +MODULE_PARM_DESC(d3cold, "d3cold support (1 = enable, 0 = disable, -1 =
> auto)");
> +module_param_named(d3cold, amdgpu_d3cold, int, 0444);
> +
> /**
> * DOC: runpm (int)
> * Override for runtime power management control for dGPUs. The amdgpu
> driver can dynamically power down
> --
> 2.34.1
>
