[PATCH 7/8] drm/amdgpu/swSMU: handle manual AC/DC notifications

[Alex Deucher]

For boards that do not support automatic AC/DC transitions
in firmware, manually tell the firmware when the status
changes.

Signed-off-by: Alex Deucher <alexander.deuc...@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c        |  3 +++
 drivers/gpu/drm/amd/powerplay/amdgpu_smu.c    | 23 +++++++++++++++++++
 .../gpu/drm/amd/powerplay/inc/amdgpu_smu.h    |  1 +
 3 files changed, 27 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
index bc3cf04a1a94..f197f1be0969 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
@@ -92,6 +92,9 @@ void amdgpu_pm_acpi_event_handler(struct amdgpu_device *adev)
                if (adev->powerplay.pp_funcs->enable_bapm)
                        amdgpu_dpm_enable_bapm(adev, adev->pm.ac_power);
                mutex_unlock(&adev->pm.mutex);
+
+               if (is_support_sw_smu(adev))
+                       smu_set_ac_dc(&adev->smu);
        }
 }
 
diff --git a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c 
b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
index 54d156bbc0f3..6f4015f87781 100644
--- a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
+++ b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
@@ -2087,6 +2087,29 @@ int smu_set_watermarks_for_clock_ranges(struct 
smu_context *smu,
        return 0;
 }
 
+int smu_set_ac_dc(struct smu_context *smu)
+{
+       int ret = 0;
+
+       /* controlled by firmware */
+       if (smu->dc_controlled_by_gpio)
+               return 0;
+
+       mutex_lock(&smu->mutex);
+       if (smu->ppt_funcs->set_power_source) {
+               if (smu->adev->pm.ac_power)
+                       ret = smu_set_power_source(smu, SMU_POWER_SOURCE_AC);
+               else
+                       ret = smu_set_power_source(smu, SMU_POWER_SOURCE_DC);
+               if (ret)
+                       pr_err("Failed to switch to %s mode!\n",
+                              smu->adev->pm.ac_power ? "AC" : "DC");
+       }
+       mutex_unlock(&smu->mutex);
+
+       return ret;
+}
+
 const struct amd_ip_funcs smu_ip_funcs = {
        .name = "smu",
        .early_init = smu_early_init,
diff --git a/drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h 
b/drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h
index 18172dfec947..ae2c318dd6fa 100644
--- a/drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h
+++ b/drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h
@@ -720,6 +720,7 @@ int smu_get_dpm_level_range(struct smu_context *smu, enum 
smu_clk_type clk_type,
 enum amd_dpm_forced_level smu_get_performance_level(struct smu_context *smu);
 int smu_force_performance_level(struct smu_context *smu, enum 
amd_dpm_forced_level level);
 int smu_set_display_count(struct smu_context *smu, uint32_t count);
+int smu_set_ac_dc(struct smu_context *smu);
 bool smu_clk_dpm_is_enabled(struct smu_context *smu, enum smu_clk_type 
clk_type);
 const char *smu_get_message_name(struct smu_context *smu, enum 
smu_message_type type);
 const char *smu_get_feature_name(struct smu_context *smu, enum 
smu_feature_mask feature);
-- 
2.25.1

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