From: Perry Yuan <perry.yuan@amd.com>
Date: Tue, 3 Mar 2026 08:42:45 +0000 (+0800)
Subject: drm/amdgpu: only set PTL SYSFS disable bit when PTL is disabled
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3311f0db4d44804751ff635c4443b2330da17781;p=thirdparty%2Fkernel%2Flinux.git

drm/amdgpu: only set PTL SYSFS disable bit when PTL is disabled

Only set the bit when PTL is actually being disabled (state=0)

Signed-off-by: Perry Yuan <perry.yuan@amd.com>
Reviewed-by: Yifan Zhang <yifan1.zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c
index 5781a3934b6e7..d0e7212519f9b 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c
@@ -2392,7 +2392,7 @@ static int gfx_v9_4_3_perf_monitor_ptl_init(struct amdgpu_device *adev, bool ena
 		fmt2 = ptl->fmt2;
 	}
 
-	/* initialize PTL with default formats: GFX_FTYPE_I8 & GFX_FTYPE_BF16 */
+	/* initialize PTL with default formats: GFX_FTYPE_VECTOR & GFX_FTYPE_F8 */
 	r = amdgpu_ptl_perf_monitor_ctrl(adev, PSP_PTL_PERF_MON_SET, &ptl_state,
 							&fmt1, &fmt2);
 	if (r)
@@ -2401,6 +2401,13 @@ static int gfx_v9_4_3_perf_monitor_ptl_init(struct amdgpu_device *adev, bool ena
 	ptl->hw_supported = true;
 
 	atomic_set(&ptl->disable_ref, 0);
+	if (!enable) {
+		dev_dbg(adev->dev,
+			"PTL disabled (amdgpu.ptl=%d)\
+			To enable, set amdgpu.ptl=1 via module param or kernel cmdline\n",
+			amdgpu_ptl);
+		set_bit(AMDGPU_PTL_DISABLE_SYSFS, ptl->disable_bitmap);
+	}
 
 	return 0;
 }