RE: [PATCH 7/7] drm/amd/pm: implement processor fine grain feature for vangogh

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-----Original Message-----
From: amd-gfx <amd-gfx-bounces@xxxxxxxxxxxxxxxxxxxxx> On Behalf Of Huang Rui
Sent: Friday, January 8, 2021 4:55 PM
To: amd-gfx@xxxxxxxxxxxxxxxxxxxxx
Cc: Deucher, Alexander <Alexander.Deucher@xxxxxxx>; Hou, Xiaomeng (Matthew) <Xiaomeng.Hou@xxxxxxx>; Huang, Ray <Ray.Huang@xxxxxxx>; Liu, Aaron <Aaron.Liu@xxxxxxx>; Du, Xiaojian <Xiaojian.Du@xxxxxxx>
Subject: [PATCH 7/7] drm/amd/pm: implement processor fine grain feature for vangogh

This patch is to implement the processor fine grain feature for vangogh.
It's similar with gfx clock, the only difference is below:

echo "p core_id level value" > pp_od_clk_voltage

1. "p" - set the cclk (processor) frequency
2. "core_id" - 0/1/2/3, represents which cpu core you want to select
2. "level" - 0 or 1, "0" represents the min value,  "1" represents the
   max value
3. "value" - the target value of cclk frequency, it should be limited in
   the safe range

Signed-off-by: Huang Rui <ray.huang@xxxxxxx>
---
 .../gpu/drm/amd/include/kgd_pp_interface.h    |  1 +
 drivers/gpu/drm/amd/pm/amdgpu_pm.c            |  3 +
 drivers/gpu/drm/amd/pm/inc/amdgpu_smu.h       |  6 ++
 drivers/gpu/drm/amd/pm/inc/smu_types.h        |  1 +
 .../gpu/drm/amd/pm/swsmu/smu11/vangogh_ppt.c  | 78 ++++++++++++++++++-
 5 files changed, 88 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/include/kgd_pp_interface.h b/drivers/gpu/drm/amd/include/kgd_pp_interface.h
index 57b24c4c205b..a41875ac5dfb 100644
--- a/drivers/gpu/drm/amd/include/kgd_pp_interface.h
+++ b/drivers/gpu/drm/amd/include/kgd_pp_interface.h
@@ -156,6 +156,7 @@ enum {
 enum PP_OD_DPM_TABLE_COMMAND {
 PP_OD_EDIT_SCLK_VDDC_TABLE,
 PP_OD_EDIT_MCLK_VDDC_TABLE,
+PP_OD_EDIT_CCLK_VDDC_TABLE,
 PP_OD_EDIT_VDDC_CURVE,
 PP_OD_RESTORE_DEFAULT_TABLE,
 PP_OD_COMMIT_DPM_TABLE,
diff --git a/drivers/gpu/drm/amd/pm/amdgpu_pm.c b/drivers/gpu/drm/amd/pm/amdgpu_pm.c
index a5be03aa384b..298784f73705 100644
--- a/drivers/gpu/drm/amd/pm/amdgpu_pm.c
+++ b/drivers/gpu/drm/amd/pm/amdgpu_pm.c
@@ -800,6 +800,8 @@ static ssize_t amdgpu_set_pp_od_clk_voltage(struct device *dev,

 if (*buf == 's')
 type = PP_OD_EDIT_SCLK_VDDC_TABLE;
+if (*buf == 'p')
[Quan, Evan] better to use "else if" here.
+type = PP_OD_EDIT_CCLK_VDDC_TABLE;
 else if (*buf == 'm')
 type = PP_OD_EDIT_MCLK_VDDC_TABLE;
 else if(*buf == 'r')
@@ -916,6 +918,7 @@ static ssize_t amdgpu_get_pp_od_clk_voltage(struct device *dev,
 size += smu_print_clk_levels(&adev->smu, SMU_OD_VDDC_CURVE, buf+size);
 size += smu_print_clk_levels(&adev->smu, SMU_OD_VDDGFX_OFFSET, buf+size);
 size += smu_print_clk_levels(&adev->smu, SMU_OD_RANGE, buf+size);
+size += smu_print_clk_levels(&adev->smu, SMU_OD_CCLK, buf+size);
 } else if (adev->powerplay.pp_funcs->print_clock_levels) {
 size = amdgpu_dpm_print_clock_levels(adev, OD_SCLK, buf);
 size += amdgpu_dpm_print_clock_levels(adev, OD_MCLK, buf+size);
diff --git a/drivers/gpu/drm/amd/pm/inc/amdgpu_smu.h b/drivers/gpu/drm/amd/pm/inc/amdgpu_smu.h
index 97d788451624..5f781a27cfb7 100644
--- a/drivers/gpu/drm/amd/pm/inc/amdgpu_smu.h
+++ b/drivers/gpu/drm/amd/pm/inc/amdgpu_smu.h
@@ -465,6 +465,12 @@ struct smu_context
 uint32_t gfx_default_soft_max_freq;
 uint32_t gfx_actual_hard_min_freq;
 uint32_t gfx_actual_soft_max_freq;
+
+uint32_t cpu_default_hard_min_freq;
+uint32_t cpu_default_soft_max_freq;
+uint32_t cpu_actual_hard_min_freq;
+uint32_t cpu_actual_soft_max_freq;
+uint32_t cpu_core_id_select;
 };

 struct i2c_adapter;
diff --git a/drivers/gpu/drm/amd/pm/inc/smu_types.h b/drivers/gpu/drm/amd/pm/inc/smu_types.h
index 8e428c728e0e..b76270e8767c 100644
--- a/drivers/gpu/drm/amd/pm/inc/smu_types.h
+++ b/drivers/gpu/drm/amd/pm/inc/smu_types.h
@@ -237,6 +237,7 @@ enum smu_clk_type {
 SMU_SCLK,
 SMU_MCLK,
 SMU_PCIE,
+SMU_OD_CCLK,
 SMU_OD_SCLK,
 SMU_OD_MCLK,
 SMU_OD_VDDC_CURVE,
diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu11/vangogh_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu11/vangogh_ppt.c
index 63be82386964..4d02177cf9b0 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu11/vangogh_ppt.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/vangogh_ppt.c
@@ -449,6 +449,15 @@ static int vangogh_print_fine_grain_clk(struct smu_context *smu,
 (smu->gfx_actual_soft_max_freq > 0) ? smu->gfx_actual_soft_max_freq : smu->gfx_default_soft_max_freq);
 }
 break;
+case SMU_OD_CCLK:
+if (smu->od_enabled) {
+size = sprintf(buf, "CCLK_RANGE in Core%d:\n",  smu->cpu_core_id_select);
+size += sprintf(buf + size, "0: %10uMhz\n",
+(smu->cpu_actual_hard_min_freq > 0) ? smu->cpu_actual_hard_min_freq : smu->cpu_default_hard_min_freq);
+size += sprintf(buf + size, "1: %10uMhz\n",
+(smu->cpu_actual_soft_max_freq > 0) ? smu->cpu_actual_soft_max_freq : smu->cpu_default_soft_max_freq);
+}
+break;
 case SMU_OD_RANGE:
[Quan, Evan] The allowed frequency range for cclk should prompt user here in SMU_OD_RANGE.
 if (smu->od_enabled) {
 size = sprintf(buf, "%s:\n", "OD_RANGE");
@@ -1245,7 +1254,7 @@ static ssize_t vangogh_get_gpu_metrics(struct smu_context *smu,
 }

 static int vangogh_od_edit_dpm_table(struct smu_context *smu, enum PP_OD_DPM_TABLE_COMMAND type,
-long input[], uint32_t size)
+long input[], uint32_t size)
 {
 int ret = 0;

@@ -1255,6 +1264,34 @@ static int vangogh_od_edit_dpm_table(struct smu_context *smu, enum PP_OD_DPM_TAB
 }

 switch (type) {
+case PP_OD_EDIT_CCLK_VDDC_TABLE:
+if (size != 3) {
+dev_err(smu->adev->dev, "Input parameter number not correct (should be 4 for processor)\n");
+return -EINVAL;
+}
+if (input[0] >= boot_cpu_data.x86_max_cores) {
+dev_err(smu->adev->dev, "core index is overflow, should be less than %d\n",
+boot_cpu_data.x86_max_cores);
+}
+smu->cpu_core_id_select = input[0];
+if (input[1] == 0) {
+if (input[2] < smu->cpu_default_hard_min_freq) {
+dev_warn(smu->adev->dev, "Fine grain setting minimum cclk (%ld) MHz is less than the minimum allowed (%d) MHz\n",
+input[2], smu->cpu_default_hard_min_freq);
+return -EINVAL;
+}
+smu->cpu_actual_hard_min_freq = input[2];
+} else if (input[1] == 1) {
+if (input[2] > smu->cpu_default_soft_max_freq) {
+dev_warn(smu->adev->dev, "Fine grain setting maximum cclk (%ld) MHz is greater than the maximum allowed (%d) MHz\n",
+input[2], smu->cpu_default_soft_max_freq);
+return -EINVAL;
+}
+smu->cpu_actual_soft_max_freq = input[2];
+} else {
+return -EINVAL;
+}
+break;
 case PP_OD_EDIT_SCLK_VDDC_TABLE:
 if (size != 2) {
 dev_err(smu->adev->dev, "Input parameter number not correct\n");
@@ -1286,6 +1323,8 @@ static int vangogh_od_edit_dpm_table(struct smu_context *smu, enum PP_OD_DPM_TAB
 } else {
 smu->gfx_actual_hard_min_freq = smu->gfx_default_hard_min_freq;
 smu->gfx_actual_soft_max_freq = smu->gfx_default_soft_max_freq;
+smu->cpu_actual_hard_min_freq = smu->cpu_default_hard_min_freq;
+smu->cpu_actual_soft_max_freq = smu->cpu_default_soft_max_freq;

 ret = smu_cmn_send_smc_msg_with_param(smu, SMU_MSG_SetHardMinGfxClk,
 smu->gfx_actual_hard_min_freq, NULL);
@@ -1300,6 +1339,20 @@ static int vangogh_od_edit_dpm_table(struct smu_context *smu, enum PP_OD_DPM_TAB
 dev_err(smu->adev->dev, "Restore the default soft max sclk failed!");
 return ret;
 }
+
+ret = smu_cmn_send_smc_msg_with_param(smu, SMU_MSG_SetSoftMinCclk,
+      smu->cpu_actual_hard_min_freq, NULL);
[Quan, Evan] better to name it as "soft_min_freq" instead of "hard_min_freq".
+if (ret) {
+dev_err(smu->adev->dev, "Set hard min cclk failed!");
+return ret;
+}
+
+ret = smu_cmn_send_smc_msg_with_param(smu, SMU_MSG_SetSoftMaxCclk,
+      smu->cpu_actual_soft_max_freq, NULL);
+if (ret) {
+dev_err(smu->adev->dev, "Set soft max cclk failed!");
+return ret;
+}
 }
 break;
 case PP_OD_COMMIT_DPM_TABLE:
@@ -1326,6 +1379,24 @@ static int vangogh_od_edit_dpm_table(struct smu_context *smu, enum PP_OD_DPM_TAB
 dev_err(smu->adev->dev, "Set soft max sclk failed!");
 return ret;
 }
+
+ret = smu_cmn_send_smc_msg_with_param(smu, SMU_MSG_SetSoftMinCclk,
+      ((smu->cpu_core_id_select << 20)
+       | smu->cpu_actual_hard_min_freq),
+      NULL);
+if (ret) {
+dev_err(smu->adev->dev, "Set hard min cclk failed!");
+return ret;
+}
+
+ret = smu_cmn_send_smc_msg_with_param(smu, SMU_MSG_SetSoftMaxCclk,
+      ((smu->cpu_core_id_select << 20)
+       | smu->cpu_actual_soft_max_freq),
+      NULL);
+if (ret) {
+dev_err(smu->adev->dev, "Set soft max cclk failed!");
+return ret;
+}
 }
 break;
 default:
@@ -1351,6 +1422,11 @@ static int vangogh_set_fine_grain_gfx_freq_parameters(struct smu_context *smu)
 smu->gfx_actual_hard_min_freq = 0;
 smu->gfx_actual_soft_max_freq = 0;

+smu->cpu_default_hard_min_freq = 1400;
+smu->cpu_default_soft_max_freq = 3500;
+smu->cpu_actual_hard_min_freq = 0;
+smu->cpu_actual_soft_max_freq = 0;
+
 return 0;
 }

--
2.25.1

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