drm/amd/pm: add get_dpm_ultimate_freq function for cyan skillfish

Some clients(e.g., kfd) query sclk/mclk through this function.
As cyan skillfish doesn't support dpm, for sclk, set min/max
to CYAN_SKILLFISH_SCLK_MIN/CYAN_SKILLFISH_SCLK_MAX(to maintain the
existing logic).For others, set both min and max to current value.

Before this patch:
 # /opt/rocm/opencl/bin/clinfo

 Max clock frequency:                           0Mhz

After this patch:
 # /opt/rocm/opencl/bin/clinfo

 Max clock frequency:                           2000Mhz

v2:
 - Maintain the existing min/max sclk logic.(Lijo)
v3:
 - Avoid fetching metrics table twice.(Lijo)

Signed-off-by: Lang Yu <Lang.Yu@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@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/pm/swsmu/smu11/cyan_skillfish_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu11/cyan_skillfish_ppt.c
index 2acd7470431e0f7768fec1f92847f187535b96b4..d743984b68a23a8c71c43960dcdbef58a970b3c4 100644 (file)
--- a/drivers/gpu/drm/amd/pm/swsmu/smu11/cyan_skillfish_ppt.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/cyan_skillfish_ppt.c
@@ -542,6 +542,36 @@ static int cyan_skillfish_od_edit_dpm_table(struct smu_context *smu,
        return ret;
 }
 
+static int cyan_skillfish_get_dpm_ultimate_freq(struct smu_context *smu,
+                                               enum smu_clk_type clk_type,
+                                               uint32_t *min,
+                                               uint32_t *max)
+{
+       int ret = 0;
+       uint32_t low, high;
+
+       switch (clk_type) {
+       case SMU_GFXCLK:
+       case SMU_SCLK:
+               low = CYAN_SKILLFISH_SCLK_MIN;
+               high = CYAN_SKILLFISH_SCLK_MAX;
+               break;
+       default:
+               ret = cyan_skillfish_get_current_clk_freq(smu, clk_type, &low);
+               if (ret)
+                       return ret;
+               high = low;
+               break;
+       }
+
+       if (min)
+               *min = low;
+       if (max)
+               *max = high;
+
+       return 0;
+}
+
 static const struct pptable_funcs cyan_skillfish_ppt_funcs = {
 
        .check_fw_status = smu_v11_0_check_fw_status,
@@ -555,6 +585,7 @@ static const struct pptable_funcs cyan_skillfish_ppt_funcs = {
        .is_dpm_running = cyan_skillfish_is_dpm_running,
        .get_gpu_metrics = cyan_skillfish_get_gpu_metrics,
        .od_edit_dpm_table = cyan_skillfish_od_edit_dpm_table,
+       .get_dpm_ultimate_freq = cyan_skillfish_get_dpm_ultimate_freq,
        .register_irq_handler = smu_v11_0_register_irq_handler,
        .notify_memory_pool_location = smu_v11_0_notify_memory_pool_location,
        .send_smc_msg_with_param = smu_cmn_send_smc_msg_with_param,