RE: [PATCH] drm/amdgpu: seperate the dependency between CGCG and CGLS when diable CGCG/CGLS

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-----Original Message-----
From: amd-gfx <amd-gfx-bounces@xxxxxxxxxxxxxxxxxxxxx> On Behalf Of Changfeng.Zhu
Sent: Thursday, April 29, 2021 11:39 AM
To: amd-gfx@xxxxxxxxxxxxxxxxxxxxx; Huang, Ray <Ray.Huang@xxxxxxx>; Wang, Kevin(Yang) <Kevin1.Wang@xxxxxxx>
Cc: Zhu, Changfeng <Changfeng.Zhu@xxxxxxx>
Subject: [PATCH] drm/amdgpu: seperate the dependency between CGCG and CGLS when diable CGCG/CGLS

From: changzhu <Changfeng.Zhu@xxxxxxx>

From: Changfeng <Changfeng.Zhu@xxxxxxx>

The disable process of CGLS is dependent on CGCG now. Align with windows code, seperate the dependency between CGCG and CGLS and it will reduce confusion when debug CGCG/CGLS related issue.

Change-Id: Ia91b8b16236bebd9224160672e500f6850dbc268
Signed-off-by: Changfeng <Changfeng.Zhu@xxxxxxx>
---
 drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c | 24 ++++++++++++-------  drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c  | 33 ++++++++++++++++----------
 2 files changed, 37 insertions(+), 20 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
index 49fd10a15707..3f8aa2fb974d 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
@@ -7717,18 +7717,22 @@ static void gfx_v10_0_update_3d_clock_gating(struct amdgpu_device *adev,
 	uint32_t data, def;
 
 	/* Enable 3D CGCG/CGLS */
-	if (enable && (adev->cg_flags & AMD_CG_SUPPORT_GFX_3D_CGCG)) {
+	if (enable) {


<> After entering the condition, you could just do an initial check here for if (adev->cg_flags & AMD_CG_SUPPORT_GFX_3D_CGCG) and return if the device doesn't support it. Otherwise proceed with the rest of register reads and setting appropriate values. Same for gfx v9 also.

Thanks,
Lijo

 		/* write cmd to clear cgcg/cgls ov */
 		def = data = RREG32_SOC15(GC, 0, mmRLC_CGTT_MGCG_OVERRIDE);
 		/* unset CGCG override */
-		data &= ~RLC_CGTT_MGCG_OVERRIDE__GFXIP_GFX3D_CG_OVERRIDE_MASK;
+		if (adev->cg_flags & AMD_CG_SUPPORT_GFX_3D_CGCG)
+			data &= ~RLC_CGTT_MGCG_OVERRIDE__GFXIP_GFX3D_CG_OVERRIDE_MASK;
 		/* update CGCG and CGLS override bits */
 		if (def != data)
 			WREG32_SOC15(GC, 0, mmRLC_CGTT_MGCG_OVERRIDE, data);
 		/* enable 3Dcgcg FSM(0x0000363f) */
 		def = RREG32_SOC15(GC, 0, mmRLC_CGCG_CGLS_CTRL_3D);
-		data = (0x36 << RLC_CGCG_CGLS_CTRL_3D__CGCG_GFX_IDLE_THRESHOLD__SHIFT) |
-			RLC_CGCG_CGLS_CTRL_3D__CGCG_EN_MASK;
+		data = 0;
+
+		if (adev->cg_flags & AMD_CG_SUPPORT_GFX_3D_CGCG)
+			data |= (0x36 << RLC_CGCG_CGLS_CTRL_3D__CGCG_GFX_IDLE_THRESHOLD__SHIFT) |
+				RLC_CGCG_CGLS_CTRL_3D__CGCG_EN_MASK;
 		if (adev->cg_flags & AMD_CG_SUPPORT_GFX_3D_CGLS)
 			data |= (0x000F << RLC_CGCG_CGLS_CTRL_3D__CGLS_REP_COMPANSAT_DELAY__SHIFT) |
 				RLC_CGCG_CGLS_CTRL_3D__CGLS_EN_MASK;
@@ -7758,10 +7762,11 @@ static void gfx_v10_0_update_coarse_grain_clock_gating(struct amdgpu_device *ade  {
 	uint32_t def, data;
 
-	if (enable && (adev->cg_flags & AMD_CG_SUPPORT_GFX_CGCG)) {
+	if (enable) {
 		def = data = RREG32_SOC15(GC, 0, mmRLC_CGTT_MGCG_OVERRIDE);
 		/* unset CGCG override */
-		data &= ~RLC_CGTT_MGCG_OVERRIDE__GFXIP_CGCG_OVERRIDE_MASK;
+		if (adev->cg_flags & AMD_CG_SUPPORT_GFX_CGCG)
+			data &= ~RLC_CGTT_MGCG_OVERRIDE__GFXIP_CGCG_OVERRIDE_MASK;
 		if (adev->cg_flags & AMD_CG_SUPPORT_GFX_CGLS)
 			data &= ~RLC_CGTT_MGCG_OVERRIDE__GFXIP_CGLS_OVERRIDE_MASK;
 		else
@@ -7772,8 +7777,11 @@ static void gfx_v10_0_update_coarse_grain_clock_gating(struct amdgpu_device *ade
 
 		/* enable cgcg FSM(0x0000363F) */
 		def = RREG32_SOC15(GC, 0, mmRLC_CGCG_CGLS_CTRL);
-		data = (0x36 << RLC_CGCG_CGLS_CTRL__CGCG_GFX_IDLE_THRESHOLD__SHIFT) |
-			RLC_CGCG_CGLS_CTRL__CGCG_EN_MASK;
+		data = 0;
+
+		if (adev->cg_flags & AMD_CG_SUPPORT_GFX_CGCG)
+			data |= (0x36 << RLC_CGCG_CGLS_CTRL__CGCG_GFX_IDLE_THRESHOLD__SHIFT) |
+				RLC_CGCG_CGLS_CTRL__CGCG_EN_MASK;
 		if (adev->cg_flags & AMD_CG_SUPPORT_GFX_CGLS)
 			data |= (0x000F << RLC_CGCG_CGLS_CTRL__CGLS_REP_COMPANSAT_DELAY__SHIFT) |
 				RLC_CGCG_CGLS_CTRL__CGLS_EN_MASK;
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
index 16a3b279a9ef..f69129097f2e 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
@@ -4946,20 +4946,23 @@ static void gfx_v9_0_update_3d_clock_gating(struct amdgpu_device *adev,
 	amdgpu_gfx_rlc_enter_safe_mode(adev);
 
 	/* Enable 3D CGCG/CGLS */
-	if (enable && (adev->cg_flags & AMD_CG_SUPPORT_GFX_3D_CGCG)) {
+	if (enable) {
 		/* write cmd to clear cgcg/cgls ov */
 		def = data = RREG32_SOC15(GC, 0, mmRLC_CGTT_MGCG_OVERRIDE);
 		/* unset CGCG override */
-		data &= ~RLC_CGTT_MGCG_OVERRIDE__GFXIP_GFX3D_CG_OVERRIDE_MASK;
+		if (adev->cg_flags & AMD_CG_SUPPORT_GFX_3D_CGCG)
+			data &= ~RLC_CGTT_MGCG_OVERRIDE__GFXIP_GFX3D_CG_OVERRIDE_MASK;
 		/* update CGCG and CGLS override bits */
 		if (def != data)
 			WREG32_SOC15(GC, 0, mmRLC_CGTT_MGCG_OVERRIDE, data);
 
 		/* enable 3Dcgcg FSM(0x0000363f) */
 		def = RREG32_SOC15(GC, 0, mmRLC_CGCG_CGLS_CTRL_3D);
+		data = 0;
 
-		data = (0x36 << RLC_CGCG_CGLS_CTRL_3D__CGCG_GFX_IDLE_THRESHOLD__SHIFT) |
-			RLC_CGCG_CGLS_CTRL_3D__CGCG_EN_MASK;
+		if (adev->cg_flags & AMD_CG_SUPPORT_GFX_3D_CGCG)
+			data |= (0x36 << RLC_CGCG_CGLS_CTRL_3D__CGCG_GFX_IDLE_THRESHOLD__SHIFT) |
+				RLC_CGCG_CGLS_CTRL_3D__CGCG_EN_MASK;
 		if (adev->cg_flags & AMD_CG_SUPPORT_GFX_3D_CGLS)
 			data |= (0x000F << RLC_CGCG_CGLS_CTRL_3D__CGLS_REP_COMPANSAT_DELAY__SHIFT) |
 				RLC_CGCG_CGLS_CTRL_3D__CGLS_EN_MASK;
@@ -4993,10 +4996,12 @@ static void gfx_v9_0_update_coarse_grain_clock_gating(struct amdgpu_device *adev
 
 	amdgpu_gfx_rlc_enter_safe_mode(adev);
 
-	if (enable && (adev->cg_flags & AMD_CG_SUPPORT_GFX_CGCG)) {
+	if (enable) {
 		def = data = RREG32_SOC15(GC, 0, mmRLC_CGTT_MGCG_OVERRIDE);
 		/* unset CGCG override */
-		data &= ~RLC_CGTT_MGCG_OVERRIDE__GFXIP_CGCG_OVERRIDE_MASK;
+		if (adev->cg_flags & AMD_CG_SUPPORT_GFX_CGCG)
+			data &= ~RLC_CGTT_MGCG_OVERRIDE__GFXIP_CGCG_OVERRIDE_MASK;
+
 		if (adev->cg_flags & AMD_CG_SUPPORT_GFX_CGLS)
 			data &= ~RLC_CGTT_MGCG_OVERRIDE__GFXIP_CGLS_OVERRIDE_MASK;
 		else
@@ -5007,13 +5012,17 @@ static void gfx_v9_0_update_coarse_grain_clock_gating(struct amdgpu_device *adev
 
 		/* enable cgcg FSM(0x0000363F) */
 		def = RREG32_SOC15(GC, 0, mmRLC_CGCG_CGLS_CTRL);
+		data = 0;
+
+		if (adev->cg_flags & AMD_CG_SUPPORT_GFX_CGCG) {
+			if (adev->asic_type == CHIP_ARCTURUS)
+				data |= (0x2000 << RLC_CGCG_CGLS_CTRL__CGCG_GFX_IDLE_THRESHOLD__SHIFT) |
+					RLC_CGCG_CGLS_CTRL__CGCG_EN_MASK;
+			else
+				data |= (0x36 << RLC_CGCG_CGLS_CTRL__CGCG_GFX_IDLE_THRESHOLD__SHIFT) |
+					RLC_CGCG_CGLS_CTRL__CGCG_EN_MASK;
+		}
 
-		if (adev->asic_type == CHIP_ARCTURUS)
-			data = (0x2000 << RLC_CGCG_CGLS_CTRL__CGCG_GFX_IDLE_THRESHOLD__SHIFT) |
-				RLC_CGCG_CGLS_CTRL__CGCG_EN_MASK;
-		else
-			data = (0x36 << RLC_CGCG_CGLS_CTRL__CGCG_GFX_IDLE_THRESHOLD__SHIFT) |
-				RLC_CGCG_CGLS_CTRL__CGCG_EN_MASK;
 		if (adev->cg_flags & AMD_CG_SUPPORT_GFX_CGLS)
 			data |= (0x000F << RLC_CGCG_CGLS_CTRL__CGLS_REP_COMPANSAT_DELAY__SHIFT) |
 				RLC_CGCG_CGLS_CTRL__CGLS_EN_MASK;
--
2.17.1

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