drm/amdgpu: add custom power policy support in sysfs

when cat pp_power_profile_mode on Vega10
NUM        MODE_NAME BUSY_SET_POINT FPS USE_RLC_BUSY MIN_ACTIVE_LEVEL
  0 3D_FULL_SCREEN :             70  60          1              3
  1   POWER_SAVING :             90  60          0              0
  2          VIDEO*:             70  60          0              0
  3             VR :             70  90          0              0
  4       COMPUTER :             30  60          0              6
  5         CUSTOM :              0   0          0              0

the result show all the profile mode we can support and custom mode.
user can echo the num(0-4) to pp_power_profile_mode to select the profile
mode or can echo "5 value value value value" to enter CUSTOM mode.
the four parameter is set_point/FPS/USER_RLC_BUSY/MIN_ACTIVE_LEVEL.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_dpm.h

@@ -366,6 +366,14 @@ enum amdgpu_pcie_gen {
 			(adev)->powerplay.pp_handle, virtual_addr_low, \
 			virtual_addr_hi, mc_addr_low, mc_addr_hi, size)
 
+#define amdgpu_dpm_get_power_profile_mode(adev, buf) \
+		((adev)->powerplay.pp_funcs->get_power_profile_mode(\
+			(adev)->powerplay.pp_handle, buf))
+
+#define amdgpu_dpm_set_power_profile_mode(adev, parameter, size) \
+		((adev)->powerplay.pp_funcs->set_power_profile_mode(\
+			(adev)->powerplay.pp_handle, parameter, size))
+
 struct amdgpu_dpm {
 	struct amdgpu_ps        *ps;
 	/* number of valid power states */

drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c

@@ -584,6 +584,73 @@ fail:
 	return count;
 }
 
+static ssize_t amdgpu_get_pp_power_profile_mode(struct device *dev,
+		struct device_attribute *attr,
+		char *buf)
+{
+	struct drm_device *ddev = dev_get_drvdata(dev);
+	struct amdgpu_device *adev = ddev->dev_private;
+
+	if (adev->powerplay.pp_funcs->get_power_profile_mode)
+		return amdgpu_dpm_get_power_profile_mode(adev, buf);
+
+	return snprintf(buf, PAGE_SIZE, "\n");
+}
+
+
+static ssize_t amdgpu_set_pp_power_profile_mode(struct device *dev,
+		struct device_attribute *attr,
+		const char *buf,
+		size_t count)
+{
+	int ret = 0xff;
+	struct drm_device *ddev = dev_get_drvdata(dev);
+	struct amdgpu_device *adev = ddev->dev_private;
+	uint32_t parameter_size = 0;
+	long parameter[64];
+	char *sub_str, buf_cpy[128];
+	char *tmp_str;
+	uint32_t i = 0;
+	char tmp[2];
+	long int profile_mode = 0;
+	const char delimiter[3] = {' ', '\n', '\0'};
+
+	tmp[0] = *(buf);
+	tmp[1] = '\0';
+	ret = kstrtol(tmp, 0, &profile_mode);
+	if (ret)
+		goto fail;
+
+	if (profile_mode == PP_SMC_POWER_PROFILE_CUSTOM) {
+		if (count < 2 || count > 127)
+			return -EINVAL;
+		while (isspace(*++buf))
+			i++;
+		memcpy(buf_cpy, buf, count-i);
+		tmp_str = buf_cpy;
+		while (tmp_str[0]) {
+			sub_str = strsep(&tmp_str, delimiter);
+			ret = kstrtol(sub_str, 0, &parameter[parameter_size]);
+			if (ret) {
+				count = -EINVAL;
+				goto fail;
+			}
+			pr_info("value is %ld \n", parameter[parameter_size]);
+			parameter_size++;
+			while (isspace(*tmp_str))
+				tmp_str++;
+		}
+	}
+	parameter[parameter_size] = profile_mode;
+	if (adev->powerplay.pp_funcs->set_power_profile_mode)
+		ret = amdgpu_dpm_set_power_profile_mode(adev, parameter, parameter_size);
+
+	if (!ret)
+		return count;
+fail:
+	return -EINVAL;
+}
+
 static ssize_t amdgpu_get_pp_power_profile(struct device *dev,
 		char *buf, struct amd_pp_profile *query)
 {
@@ -772,7 +839,9 @@ static DEVICE_ATTR(pp_gfx_power_profile, S_IRUGO | S_IWUSR,
 static DEVICE_ATTR(pp_compute_power_profile, S_IRUGO | S_IWUSR,
 		amdgpu_get_pp_compute_power_profile,
 		amdgpu_set_pp_compute_power_profile);
-
+static DEVICE_ATTR(pp_power_profile_mode, S_IRUGO | S_IWUSR,
+		amdgpu_get_pp_power_profile_mode,
+		amdgpu_set_pp_power_profile_mode);
 static ssize_t amdgpu_hwmon_show_temp(struct device *dev,
 				      struct device_attribute *attr,
 				      char *buf)
@@ -1405,6 +1474,14 @@ int amdgpu_pm_sysfs_init(struct amdgpu_device *adev)
 		return ret;
 	}
 
+	ret = device_create_file(adev->dev,
+			&dev_attr_pp_power_profile_mode);
+	if (ret) {
+		DRM_ERROR("failed to create device file	"
+				"pp_power_profile_mode\n");
+		return ret;
+	}
+
 	ret = amdgpu_debugfs_pm_init(adev);
 	if (ret) {
 		DRM_ERROR("Failed to register debugfs file for dpm!\n");
@@ -1440,6 +1517,8 @@ void amdgpu_pm_sysfs_fini(struct amdgpu_device *adev)
 			&dev_attr_pp_gfx_power_profile);
 	device_remove_file(adev->dev,
 			&dev_attr_pp_compute_power_profile);
+	device_remove_file(adev->dev,
+			&dev_attr_pp_power_profile_mode);
 }
 
 void amdgpu_pm_compute_clocks(struct amdgpu_device *adev)

drivers/gpu/drm/amd/include/kgd_pp_interface.h

@@ -140,7 +140,15 @@ struct amd_pp_init {
 	uint32_t feature_mask;
 };
 
-
+enum PP_SMC_POWER_PROFILE {
+	PP_SMC_POWER_PROFILE_FULLSCREEN3D = 0x0,
+	PP_SMC_POWER_PROFILE_POWERSAVING  = 0x1,
+	PP_SMC_POWER_PROFILE_VIDEO        = 0x2,
+	PP_SMC_POWER_PROFILE_VR           = 0x3,
+	PP_SMC_POWER_PROFILE_COMPUTE      = 0x4,
+	PP_SMC_POWER_PROFILE_CUSTOM       = 0x5,
+	PP_SMC_POWER_PROFILE_AUTO         = 0x6,
+};
 
 enum {
 	PP_GROUP_UNKNOWN = 0,
@@ -289,6 +297,8 @@ struct amd_pm_funcs {
 				struct pp_display_clock_request *clock);
 	int (*get_display_mode_validation_clocks)(void *handle,
 		struct amd_pp_simple_clock_info *clocks);
+	int (*get_power_profile_mode)(void *handle, char *buf);
+	int (*set_power_profile_mode)(void *handle, long *input, uint32_t size);
 };
 
 #endif