drm/amd/powerplay: add helper function of smu_get_dpm_freq_range

add this helper function to get dpm clk information (min, max);

Signed-off-by: Kevin Wang <kevin1.wang@amd.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
index b2731a6..ec84921 100644 (file)
--- a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
+++ b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
@@ -60,6 +60,42 @@ int smu_get_smc_version(struct smu_context *smu, uint32_t *if_version, uint32_t
        return ret;
 }
 
+int smu_get_dpm_freq_range(struct smu_context *smu, enum smu_clk_type clk_type,
+                          uint32_t *min, uint32_t *max)
+{
+       int ret = 0, clk_id = 0;
+       uint32_t param = 0;
+
+       if (!min && !max)
+               return -EINVAL;
+
+       clk_id = smu_clk_get_index(smu, clk_type);
+       if (clk_id < 0)
+               return clk_id;
+
+       param = (clk_id & 0xffff) << 16;
+
+       if (max) {
+               ret = smu_send_smc_msg_with_param(smu, SMU_MSG_GetMaxDpmFreq, param);
+               if (ret)
+                       return ret;
+               ret = smu_read_smc_arg(smu, max);
+               if (ret)
+                       return ret;
+       }
+
+       if (min) {
+               ret = smu_send_smc_msg_with_param(smu, SMU_MSG_GetMinDpmFreq, param);
+               if (ret)
+                       return ret;
+               ret = smu_read_smc_arg(smu, min);
+               if (ret)
+                       return ret;
+       }
+
+       return ret;
+}
+
 int smu_get_dpm_freq_by_index(struct smu_context *smu, enum smu_clk_type clk_type,
                              uint16_t level, uint32_t *value)
 {

diff --git a/drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h b/drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h
index b51fdcb..16127ea 100644 (file)
--- a/drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h
+++ b/drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h
@@ -939,4 +939,6 @@ int smu_get_dpm_freq_by_index(struct smu_context *smu, enum smu_clk_type clk_typ
                              uint16_t level, uint32_t *value);
 int smu_get_dpm_level_count(struct smu_context *smu, enum smu_clk_type clk_type,
                            uint32_t *value);
+int smu_get_dpm_freq_range(struct smu_context *smu, enum smu_clk_type clk_type,
+                          uint32_t *min, uint32_t *max);
 #endif