[PATCH 3/7] drm/amdgpu: add HDP IP v5.2.1 Clock Gating support
Tim Huang
tim.huang at amd.com
Thu Aug 11 04:58:00 UTC 2022
Add set/get_clockgating for HDP IP v5.2.1.
Signed-off-by: Tim Huang <tim.huang at amd.com>
---
drivers/gpu/drm/amd/amdgpu/hdp_v5_2.c | 150 ++++++++++++++++++++++++++
1 file changed, 150 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/hdp_v5_2.c b/drivers/gpu/drm/amd/amdgpu/hdp_v5_2.c
index 39a696cd45b5..29c3484ae1f1 100644
--- a/drivers/gpu/drm/amd/amdgpu/hdp_v5_2.c
+++ b/drivers/gpu/drm/amd/amdgpu/hdp_v5_2.c
@@ -40,6 +40,156 @@ static void hdp_v5_2_flush_hdp(struct amdgpu_device *adev,
0);
}
+static void hdp_v5_2_update_mem_power_gating(struct amdgpu_device *adev,
+ bool enable)
+{
+ uint32_t hdp_clk_cntl;
+ uint32_t hdp_mem_pwr_cntl;
+
+ if (!(adev->cg_flags & (AMD_CG_SUPPORT_HDP_LS |
+ AMD_CG_SUPPORT_HDP_DS |
+ AMD_CG_SUPPORT_HDP_SD)))
+ return;
+
+ hdp_clk_cntl = RREG32_SOC15(HDP, 0, regHDP_CLK_CNTL);
+ hdp_mem_pwr_cntl = RREG32_SOC15(HDP, 0, regHDP_MEM_POWER_CTRL);
+
+ /* Before doing clock/power mode switch, forced on MEM clock */
+ hdp_clk_cntl = REG_SET_FIELD(hdp_clk_cntl, HDP_CLK_CNTL,
+ ATOMIC_MEM_CLK_SOFT_OVERRIDE, 1);
+ hdp_clk_cntl = REG_SET_FIELD(hdp_clk_cntl, HDP_CLK_CNTL,
+ RC_MEM_CLK_SOFT_OVERRIDE, 1);
+ WREG32_SOC15(HDP, 0, regHDP_CLK_CNTL, hdp_clk_cntl);
+
+ /* disable clock and power gating before any changing */
+ hdp_mem_pwr_cntl = REG_SET_FIELD(hdp_mem_pwr_cntl, HDP_MEM_POWER_CTRL,
+ ATOMIC_MEM_POWER_CTRL_EN, 0);
+ hdp_mem_pwr_cntl = REG_SET_FIELD(hdp_mem_pwr_cntl, HDP_MEM_POWER_CTRL,
+ ATOMIC_MEM_POWER_LS_EN, 0);
+ hdp_mem_pwr_cntl = REG_SET_FIELD(hdp_mem_pwr_cntl, HDP_MEM_POWER_CTRL,
+ ATOMIC_MEM_POWER_DS_EN, 0);
+ hdp_mem_pwr_cntl = REG_SET_FIELD(hdp_mem_pwr_cntl, HDP_MEM_POWER_CTRL,
+ ATOMIC_MEM_POWER_SD_EN, 0);
+ hdp_mem_pwr_cntl = REG_SET_FIELD(hdp_mem_pwr_cntl, HDP_MEM_POWER_CTRL,
+ RC_MEM_POWER_CTRL_EN, 0);
+ hdp_mem_pwr_cntl = REG_SET_FIELD(hdp_mem_pwr_cntl, HDP_MEM_POWER_CTRL,
+ RC_MEM_POWER_LS_EN, 0);
+ hdp_mem_pwr_cntl = REG_SET_FIELD(hdp_mem_pwr_cntl, HDP_MEM_POWER_CTRL,
+ RC_MEM_POWER_DS_EN, 0);
+ hdp_mem_pwr_cntl = REG_SET_FIELD(hdp_mem_pwr_cntl, HDP_MEM_POWER_CTRL,
+ RC_MEM_POWER_SD_EN, 0);
+ WREG32_SOC15(HDP, 0, regHDP_MEM_POWER_CTRL, hdp_mem_pwr_cntl);
+
+ /* Already disabled above. The actions below are for "enabled" only */
+ if (enable) {
+ /* only one clock gating mode (LS/DS/SD) can be enabled */
+ if (adev->cg_flags & AMD_CG_SUPPORT_HDP_SD) {
+ hdp_mem_pwr_cntl = REG_SET_FIELD(hdp_mem_pwr_cntl,
+ HDP_MEM_POWER_CTRL,
+ ATOMIC_MEM_POWER_SD_EN, 1);
+ hdp_mem_pwr_cntl = REG_SET_FIELD(hdp_mem_pwr_cntl,
+ HDP_MEM_POWER_CTRL,
+ RC_MEM_POWER_SD_EN, 1);
+ } else if (adev->cg_flags & AMD_CG_SUPPORT_HDP_LS) {
+ hdp_mem_pwr_cntl = REG_SET_FIELD(hdp_mem_pwr_cntl,
+ HDP_MEM_POWER_CTRL,
+ ATOMIC_MEM_POWER_LS_EN, 1);
+ hdp_mem_pwr_cntl = REG_SET_FIELD(hdp_mem_pwr_cntl,
+ HDP_MEM_POWER_CTRL,
+ RC_MEM_POWER_LS_EN, 1);
+ } else if (adev->cg_flags & AMD_CG_SUPPORT_HDP_DS) {
+ hdp_mem_pwr_cntl = REG_SET_FIELD(hdp_mem_pwr_cntl,
+ HDP_MEM_POWER_CTRL,
+ ATOMIC_MEM_POWER_DS_EN, 1);
+ hdp_mem_pwr_cntl = REG_SET_FIELD(hdp_mem_pwr_cntl,
+ HDP_MEM_POWER_CTRL,
+ RC_MEM_POWER_DS_EN, 1);
+ }
+
+ /* confirmed that ATOMIC/RC_MEM_POWER_CTRL_EN have to be set for SRAM LS/DS/SD */
+ if (adev->cg_flags & (AMD_CG_SUPPORT_HDP_LS | AMD_CG_SUPPORT_HDP_DS |
+ AMD_CG_SUPPORT_HDP_SD)) {
+ hdp_mem_pwr_cntl = REG_SET_FIELD(hdp_mem_pwr_cntl, HDP_MEM_POWER_CTRL,
+ ATOMIC_MEM_POWER_CTRL_EN, 1);
+ hdp_mem_pwr_cntl = REG_SET_FIELD(hdp_mem_pwr_cntl, HDP_MEM_POWER_CTRL,
+ RC_MEM_POWER_CTRL_EN, 1);
+ WREG32_SOC15(HDP, 0, regHDP_MEM_POWER_CTRL, hdp_mem_pwr_cntl);
+ }
+ }
+
+ /* disable MEM clock override after clock/power mode changing */
+ hdp_clk_cntl = REG_SET_FIELD(hdp_clk_cntl, HDP_CLK_CNTL,
+ ATOMIC_MEM_CLK_SOFT_OVERRIDE, 0);
+ hdp_clk_cntl = REG_SET_FIELD(hdp_clk_cntl, HDP_CLK_CNTL,
+ RC_MEM_CLK_SOFT_OVERRIDE, 0);
+ WREG32_SOC15(HDP, 0, regHDP_CLK_CNTL, hdp_clk_cntl);
+}
+
+static void hdp_v5_2_update_medium_grain_clock_gating(struct amdgpu_device *adev,
+ bool enable)
+{
+ uint32_t hdp_clk_cntl;
+
+ if (!(adev->cg_flags & AMD_CG_SUPPORT_HDP_MGCG))
+ return;
+
+ hdp_clk_cntl = RREG32_SOC15(HDP, 0, regHDP_CLK_CNTL);
+
+ if (enable) {
+ hdp_clk_cntl &=
+ ~(uint32_t)
+ (HDP_CLK_CNTL__ATOMIC_MEM_CLK_SOFT_OVERRIDE_MASK |
+ HDP_CLK_CNTL__RC_MEM_CLK_SOFT_OVERRIDE_MASK |
+ HDP_CLK_CNTL__DBUS_CLK_SOFT_OVERRIDE_MASK |
+ HDP_CLK_CNTL__DYN_CLK_SOFT_OVERRIDE_MASK |
+ HDP_CLK_CNTL__XDP_REG_CLK_SOFT_OVERRIDE_MASK |
+ HDP_CLK_CNTL__HDP_REG_CLK_SOFT_OVERRIDE_MASK);
+ } else {
+ hdp_clk_cntl |= HDP_CLK_CNTL__ATOMIC_MEM_CLK_SOFT_OVERRIDE_MASK |
+ HDP_CLK_CNTL__RC_MEM_CLK_SOFT_OVERRIDE_MASK |
+ HDP_CLK_CNTL__DBUS_CLK_SOFT_OVERRIDE_MASK |
+ HDP_CLK_CNTL__DYN_CLK_SOFT_OVERRIDE_MASK |
+ HDP_CLK_CNTL__XDP_REG_CLK_SOFT_OVERRIDE_MASK |
+ HDP_CLK_CNTL__HDP_REG_CLK_SOFT_OVERRIDE_MASK;
+ }
+
+ WREG32_SOC15(HDP, 0, regHDP_CLK_CNTL, hdp_clk_cntl);
+}
+
+static void hdp_v5_2_get_clockgating_state(struct amdgpu_device *adev,
+ u64 *flags)
+{
+ uint32_t tmp;
+
+ /* AMD_CG_SUPPORT_HDP_MGCG */
+ tmp = RREG32_SOC15(HDP, 0, regHDP_CLK_CNTL);
+ if (!(tmp & (HDP_CLK_CNTL__ATOMIC_MEM_CLK_SOFT_OVERRIDE_MASK |
+ HDP_CLK_CNTL__RC_MEM_CLK_SOFT_OVERRIDE_MASK |
+ HDP_CLK_CNTL__DBUS_CLK_SOFT_OVERRIDE_MASK |
+ HDP_CLK_CNTL__DYN_CLK_SOFT_OVERRIDE_MASK |
+ HDP_CLK_CNTL__XDP_REG_CLK_SOFT_OVERRIDE_MASK |
+ HDP_CLK_CNTL__HDP_REG_CLK_SOFT_OVERRIDE_MASK)))
+ *flags |= AMD_CG_SUPPORT_HDP_MGCG;
+
+ /* AMD_CG_SUPPORT_HDP_LS/DS/SD */
+ tmp = RREG32_SOC15(HDP, 0, regHDP_MEM_POWER_CTRL);
+ if (tmp & HDP_MEM_POWER_CTRL__ATOMIC_MEM_POWER_LS_EN_MASK)
+ *flags |= AMD_CG_SUPPORT_HDP_LS;
+ else if (tmp & HDP_MEM_POWER_CTRL__ATOMIC_MEM_POWER_DS_EN_MASK)
+ *flags |= AMD_CG_SUPPORT_HDP_DS;
+ else if (tmp & HDP_MEM_POWER_CTRL__ATOMIC_MEM_POWER_SD_EN_MASK)
+ *flags |= AMD_CG_SUPPORT_HDP_SD;
+}
+
+static void hdp_v5_2_update_clock_gating(struct amdgpu_device *adev,
+ bool enable)
+{
+ hdp_v5_2_update_mem_power_gating(adev, enable);
+ hdp_v5_2_update_medium_grain_clock_gating(adev, enable);
+}
+
const struct amdgpu_hdp_funcs hdp_v5_2_funcs = {
.flush_hdp = hdp_v5_2_flush_hdp,
+ .update_clock_gating = hdp_v5_2_update_clock_gating,
+ .get_clock_gating_state = hdp_v5_2_get_clockgating_state,
};
--
2.25.1
More information about the amd-gfx
mailing list