From db2bd1a0a6151173d847567da0d2eb9260c9de3c Mon Sep 17 00:00:00 2001
From: Tim Huang <tim.huang@amd.com>
Date: Fri, 29 Jul 2022 18:37:27 +0800
Subject: drm/amdgpu: enable GFX Power Gating for GC IP v11.0.1
Git-commit: cb9c7ab1b3ddc2702379dd9639df0c2230453c2e
Patch-mainline: v6.0-rc2
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225 jsc#PED-2849
Enable GFX Power Gating control for GC IP v11.0.1.
Signed-off-by: Tim Huang <tim.huang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c | 38 ++++++++++++++++++++++++++
1 file changed, 38 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
index e03618803a1c..158d87e6805d 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
@@ -53,6 +53,7 @@
#define GFX11_MEC_HPD_SIZE 2048
#define RLCG_UCODE_LOADING_START_ADDRESS 0x00002000L
+#define RLC_PG_DELAY_3_DEFAULT_GC_11_0_1 0x1388
#define regCGTT_WD_CLK_CTRL 0x5086
#define regCGTT_WD_CLK_CTRL_BASE_IDX 1
@@ -5279,6 +5280,38 @@ static const struct amdgpu_rlc_funcs gfx_v11_0_rlc_funcs = {
.update_spm_vmid = gfx_v11_0_update_spm_vmid,
};
+static void gfx_v11_cntl_power_gating(struct amdgpu_device *adev, bool enable)
+{
+ u32 data = RREG32_SOC15(GC, 0, regRLC_PG_CNTL);
+
+ if (enable && (adev->pg_flags & AMD_PG_SUPPORT_GFX_PG))
+ data |= RLC_PG_CNTL__GFX_POWER_GATING_ENABLE_MASK;
+ else
+ data &= ~RLC_PG_CNTL__GFX_POWER_GATING_ENABLE_MASK;
+
+ WREG32_SOC15(GC, 0, regRLC_PG_CNTL, data);
+
+ // Program RLC_PG_DELAY3 for CGPG hysteresis
+ if (enable && (adev->pg_flags & AMD_PG_SUPPORT_GFX_PG)) {
+ switch (adev->ip_versions[GC_HWIP][0]) {
+ case IP_VERSION(11, 0, 1):
+ WREG32_SOC15(GC, 0, regRLC_PG_DELAY_3, RLC_PG_DELAY_3_DEFAULT_GC_11_0_1);
+ break;
+ default:
+ break;
+ }
+ }
+}
+
+static void gfx_v11_cntl_pg(struct amdgpu_device *adev, bool enable)
+{
+ amdgpu_gfx_rlc_enter_safe_mode(adev);
+
+ gfx_v11_cntl_power_gating(adev, enable);
+
+ amdgpu_gfx_rlc_exit_safe_mode(adev);
+}
+
static int gfx_v11_0_set_powergating_state(void *handle,
enum amd_powergating_state state)
{
@@ -5293,6 +5326,11 @@ static int gfx_v11_0_set_powergating_state(void *handle,
case IP_VERSION(11, 0, 2):
amdgpu_gfx_off_ctrl(adev, enable);
break;
+ case IP_VERSION(11, 0, 1):
+ gfx_v11_cntl_pg(adev, enable);
+ /* TODO: Enable this when GFXOFF is ready */
+ // amdgpu_gfx_off_ctrl(adev, enable);
+ break;
default:
break;
}
--
2.38.1