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| author | Perry Yuan <perry.yuan@amd.com> | 2026-02-09 00:42:10 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2026-05-11 15:55:56 -0400 |
| commit | b6dc8f753670e3833150482c1b7640b1fd3b30a3 (patch) | |
| tree | de5d9ae9c69a05e7fef916efd2cb64e28c031132 /drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | |
| parent | 950688d2417085f30feb6ec48c85eeda53841ea2 (diff) | |
| download | linux-next-b6dc8f753670e3833150482c1b7640b1fd3b30a3.tar.gz linux-next-b6dc8f753670e3833150482c1b7640b1fd3b30a3.zip | |
drm/amdgpu: add amdgpu.ptl module parameter for PTL control
Add a new kernel module parameter 'amdgpu.ptl' to allow
users to enable or disable PTL feature at driver loading time.
Parameter values:
*) 0 or -1: disable PTL (default)
*) 1: enable PTL
*) 2: permanently disable PTL
Signed-off-by: Perry Yuan <perry.yuan@amd.com>
Reviewed-by: Yifan Zhang <yifan1.zhang@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c index 60debd543e44..99688391e70b 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -246,6 +246,7 @@ int amdgpu_umsch_mm_fwlog; int amdgpu_rebar = -1; /* auto */ int amdgpu_user_queue = -1; uint amdgpu_hdmi_hpd_debounce_delay_ms; +int amdgpu_ptl = -1; /* auto */ DECLARE_DYNDBG_CLASSMAP(drm_debug_classes, DD_CLASS_TYPE_DISJOINT_BITS, 0, "DRM_UT_CORE", @@ -1112,6 +1113,18 @@ module_param_named(user_queue, amdgpu_user_queue, int, 0444); MODULE_PARM_DESC(hdmi_hpd_debounce_delay_ms, "HDMI HPD disconnect debounce delay in milliseconds (0 to disable (by default), 1500 is common)"); module_param_named(hdmi_hpd_debounce_delay_ms, amdgpu_hdmi_hpd_debounce_delay_ms, uint, 0644); +/** + * DOC: ptl (int) + * Enable PTL feature at boot time. Possible values: + * + * - -1 = auto (ASIC specific default) + * - 0 = disable PTL (default) + * - 1 = enable PTL + * - 2 = permanently disable PTL (cannot be re-enabled at runtime) + */ +MODULE_PARM_DESC(ptl, "Enable PTL (-1 = auto, 0 = disable (default), 1 = enable, 2 = permanently disable)"); +module_param_named(ptl, amdgpu_ptl, int, 0444); + /* These devices are not supported by amdgpu. * They are supported by the mach64, r128, radeon drivers */ |