From: Lijo Lazar <lijo.la...@amd.com>
Add logic for fine grain clock gating logic for GFX v9.4.3. The feature
will be controlled using CG flags. Also, make a change so that RLC safe
mode entry/exit is done only once during CG update sequence.
Signed-off-by: Lijo Lazar <lijo.la...@amd.com>
Reviewed-by: Hawking Zhang <hawking.zh...@amd.com>
Signed-off-by: Alex Deucher <alexander.deuc...@amd.com>
---
drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c | 71 ++++++++++++++++++++++---
1 file changed, 65 insertions(+), 6 deletions(-)
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 f899f3f1f51d..f6fb0b01c086 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c
@@ -2178,14 +2178,64 @@ static int gfx_v9_4_3_late_init(void *handle)
return 0;
}
+static void gfx_v9_4_3_xcc_update_sram_fgcg(struct amdgpu_device *adev,
+ bool enable, int xcc_id)
+{
+ uint32_t def, data;
+
+ if (!(adev->cg_flags & AMD_CG_SUPPORT_GFX_FGCG))
+ return;
+
+ def = data = RREG32_SOC15(GC, GET_INST(GC, xcc_id),
+ regRLC_CGTT_MGCG_OVERRIDE);
+
+ if (enable)
+ data &= ~RLC_CGTT_MGCG_OVERRIDE__GFXIP_FGCG_OVERRIDE_MASK;
+ else
+ data |= RLC_CGTT_MGCG_OVERRIDE__GFXIP_FGCG_OVERRIDE_MASK;
+
+ if (def != data)
+ WREG32_SOC15(GC, GET_INST(GC, xcc_id),
+ regRLC_CGTT_MGCG_OVERRIDE, data);
+
+ def = data = RREG32_SOC15(GC, GET_INST(GC, xcc_id), regRLC_CLK_CNTL);
+
+ if (enable)
+ data &= ~RLC_CLK_CNTL__RLC_SRAM_CLK_GATER_OVERRIDE_MASK;
+ else
+ data |= RLC_CLK_CNTL__RLC_SRAM_CLK_GATER_OVERRIDE_MASK;
+
+ if (def != data)
+ WREG32_SOC15(GC, GET_INST(GC, xcc_id), regRLC_CLK_CNTL, data);
+}
+
+static void gfx_v9_4_3_xcc_update_repeater_fgcg(struct amdgpu_device *adev,
+ bool enable, int xcc_id)
+{
+ uint32_t def, data;
+
+ if (!(adev->cg_flags & AMD_CG_SUPPORT_REPEATER_FGCG))
+ return;
+
+ def = data = RREG32_SOC15(GC, GET_INST(GC, xcc_id),
+ regRLC_CGTT_MGCG_OVERRIDE);
+
+ if (enable)
+ data &= ~RLC_CGTT_MGCG_OVERRIDE__GFXIP_REP_FGCG_OVERRIDE_MASK;
+ else
+ data |= RLC_CGTT_MGCG_OVERRIDE__GFXIP_REP_FGCG_OVERRIDE_MASK;
+
+ if (def != data)
+ WREG32_SOC15(GC, GET_INST(GC, xcc_id),
+ regRLC_CGTT_MGCG_OVERRIDE, data);
+}
+
static void
gfx_v9_4_3_xcc_update_medium_grain_clock_gating(struct amdgpu_device *adev,
bool enable, int xcc_id)
{
uint32_t data, def;
- amdgpu_gfx_rlc_enter_safe_mode(adev, xcc_id);
-
/* It is disabled by HW by default */
if (enable && (adev->cg_flags & AMD_CG_SUPPORT_GFX_MGCG)) {
/* 1 - RLC_CGTT_MGCG_OVERRIDE */
@@ -2245,7 +2295,6 @@ gfx_v9_4_3_xcc_update_medium_grain_clock_gating(struct
amdgpu_device *adev,
}
}
- amdgpu_gfx_rlc_exit_safe_mode(adev, xcc_id);
}
static void
@@ -2254,8 +2303,6 @@ gfx_v9_4_3_xcc_update_coarse_grain_clock_gating(struct
amdgpu_device *adev,
{
uint32_t def, data;
- amdgpu_gfx_rlc_enter_safe_mode(adev, xcc_id);
-
if (enable && (adev->cg_flags & AMD_CG_SUPPORT_GFX_CGCG)) {
def = data = RREG32_SOC15(GC, GET_INST(GC, xcc_id),
regRLC_CGTT_MGCG_OVERRIDE);
/* unset CGCG override */
@@ -2298,13 +2345,18 @@ gfx_v9_4_3_xcc_update_coarse_grain_clock_gating(struct
amdgpu_device *adev,
WREG32_SOC15(GC, GET_INST(GC, xcc_id),
regRLC_CGCG_CGLS_CTRL, data);
}
- amdgpu_gfx_rlc_exit_safe_mode(adev, xcc_id);
}
static int gfx_v9_4_3_xcc_update_gfx_clock_gating(struct amdgpu_device *adev,
bool enable, int xcc_id)
{
+ amdgpu_gfx_rlc_enter_safe_mode(adev, xcc_id);
+
if (enable) {
+ /* FGCG */
+ gfx_v9_4_3_xcc_update_sram_fgcg(adev, enable, xcc_id);
+ gfx_v9_4_3_xcc_update_repeater_fgcg(adev, enable, xcc_id);
+
/* CGCG/CGLS should be enabled after MGCG/MGLS
* === MGCG + MGLS ===
*/
@@ -2322,7 +2374,14 @@ static int gfx_v9_4_3_xcc_update_gfx_clock_gating(struct
amdgpu_device *adev,
/* === MGCG + MGLS === */
gfx_v9_4_3_xcc_update_medium_grain_clock_gating(adev, enable,
xcc_id);
+
+ /* FGCG */
+ gfx_v9_4_3_xcc_update_sram_fgcg(adev, enable, xcc_id);
+ gfx_v9_4_3_xcc_update_repeater_fgcg(adev, enable, xcc_id);
}
+
+ amdgpu_gfx_rlc_exit_safe_mode(adev, xcc_id);
+
return 0;
}
--
2.39.2
