[PATCH 4/4] drm/amdgpu: add the CI code to enable sclk OD(OverDrive)

[Alex Deucher]

From: Eric Huang <jinhuieric.hu...@amd.com>

Reviewed-by: Alex Deucher <alexander.deucher at amd.com>
Signed-off-by: Eric Huang <JinHuiEric.Huang at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/ci_dpm.c | 40 +++++++++++++++++++++++++++++++++++++
 drivers/gpu/drm/amd/amdgpu/ci_dpm.h |  1 +
 2 files changed, 41 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/ci_dpm.c 
b/drivers/gpu/drm/amd/amdgpu/ci_dpm.c
index d9fc700..fb968dd 100644
--- a/drivers/gpu/drm/amd/amdgpu/ci_dpm.c
+++ b/drivers/gpu/drm/amd/amdgpu/ci_dpm.c
@@ -3636,6 +3636,10 @@ static int ci_setup_default_dpm_tables(struct 
amdgpu_device *adev)

        ci_setup_default_pcie_tables(adev);

+       /* save a copy of the default DPM table */
+       memcpy(&(pi->golden_dpm_table), &(pi->dpm_table),
+                       sizeof(struct ci_dpm_table));
+
        return 0;
 }

@@ -6513,6 +6517,40 @@ static int ci_dpm_force_clock_level(struct amdgpu_device 
*adev,
        return 0;
 }

+static int ci_dpm_get_sclk_od(struct amdgpu_device *adev)
+{
+       struct ci_power_info *pi = ci_get_pi(adev);
+       struct ci_single_dpm_table *sclk_table = &(pi->dpm_table.sclk_table);
+       struct ci_single_dpm_table *golden_sclk_table =
+                       &(pi->golden_dpm_table.sclk_table);
+       int value;
+
+       value = (sclk_table->dpm_levels[sclk_table->count - 1].value -
+                       golden_sclk_table->dpm_levels[golden_sclk_table->count 
- 1].value) *
+                       100 /
+                       golden_sclk_table->dpm_levels[golden_sclk_table->count 
- 1].value;
+
+       return value;
+}
+
+static int ci_dpm_set_sclk_od(struct amdgpu_device *adev, uint32_t value)
+{
+       struct ci_power_info *pi = ci_get_pi(adev);
+       struct ci_ps *ps = ci_get_ps(adev->pm.dpm.requested_ps);
+       struct ci_single_dpm_table *golden_sclk_table =
+                       &(pi->golden_dpm_table.sclk_table);
+
+       if (value > 20)
+               value = 20;
+
+       ps->performance_levels[ps->performance_level_count - 1].sclk =
+                       golden_sclk_table->dpm_levels[golden_sclk_table->count 
- 1].value *
+                       value / 100 +
+                       golden_sclk_table->dpm_levels[golden_sclk_table->count 
- 1].value;
+
+       return 0;
+}
+
 const struct amd_ip_funcs ci_dpm_ip_funcs = {
        .name = "ci_dpm",
        .early_init = ci_dpm_early_init,
@@ -6549,6 +6587,8 @@ static const struct amdgpu_dpm_funcs ci_dpm_funcs = {
        .get_fan_speed_percent = &ci_dpm_get_fan_speed_percent,
        .print_clock_levels = ci_dpm_print_clock_levels,
        .force_clock_level = ci_dpm_force_clock_level,
+       .get_sclk_od = ci_dpm_get_sclk_od,
+       .set_sclk_od = ci_dpm_set_sclk_od,
 };

 static void ci_dpm_set_dpm_funcs(struct amdgpu_device *adev)
diff --git a/drivers/gpu/drm/amd/amdgpu/ci_dpm.h 
b/drivers/gpu/drm/amd/amdgpu/ci_dpm.h
index faccc30..91be299 100644
--- a/drivers/gpu/drm/amd/amdgpu/ci_dpm.h
+++ b/drivers/gpu/drm/amd/amdgpu/ci_dpm.h
@@ -193,6 +193,7 @@ struct ci_pt_defaults {

 struct ci_power_info {
        struct ci_dpm_table dpm_table;
+       struct ci_dpm_table golden_dpm_table;
        u32 voltage_control;
        u32 mvdd_control;
        u32 vddci_control;
-- 
2.5.5