drm/radeon: bind fan control on CI cards to hwmon interface (v2)

This adds a possibility to control fan on CI parts
via exported hwmon variables. Note that automatic
ucode fan management pauses if you choose to enable
manual fan control.  Use with caution!

v2: agd5f: fix formatting, squash in:

    minor fix for pwm1_enable exposed value

    Track smc control in addition to fan mode
    This fixes pwm1_enable being constantly set
    to 1 because of enabled smc control

also handle the case where smc fan control is disabled.

Signed-off-by: Oleg Chernovskiy <algonkvel@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/radeon/ci_dpm.c b/drivers/gpu/drm/radeon/ci_dpm.c
index f373a81..9d4699b 100644 (file)
--- a/drivers/gpu/drm/radeon/ci_dpm.c
+++ b/drivers/gpu/drm/radeon/ci_dpm.c
@@ -187,6 +187,9 @@ static int ci_update_uvd_dpm(struct radeon_device *rdev, bool gate);
 static PPSMC_Result ci_send_msg_to_smc_with_parameter(struct radeon_device *rdev,
                                                      PPSMC_Msg msg, u32 parameter);
 
+static void ci_thermal_start_smc_fan_control(struct radeon_device *rdev);
+static void ci_fan_ctrl_set_default_mode(struct radeon_device *rdev);
+
 static struct ci_power_info *ci_get_pi(struct radeon_device *rdev)
 {
         struct ci_power_info *pi = rdev->pm.dpm.priv;
@@ -1043,22 +1046,24 @@ static int ci_fan_ctrl_start_smc_fan_control(struct radeon_device *rdev)
                        return -EINVAL;
        }
 
+       pi->fan_is_controlled_by_smc = true;
        return 0;
 }
 
-#if 0
 static int ci_fan_ctrl_stop_smc_fan_control(struct radeon_device *rdev)
 {
        PPSMC_Result ret;
+       struct ci_power_info *pi = ci_get_pi(rdev);
 
        ret = ci_send_msg_to_smc(rdev, PPSMC_StopFanControl);
-       if (ret == PPSMC_Result_OK)
+       if (ret == PPSMC_Result_OK) {
+               pi->fan_is_controlled_by_smc = false;
                return 0;
-       else
+       } else
                return -EINVAL;
 }
 
-static int ci_fan_ctrl_get_fan_speed_percent(struct radeon_device *rdev,
+int ci_fan_ctrl_get_fan_speed_percent(struct radeon_device *rdev,
                                             u32 *speed)
 {
        u32 duty, duty100;
@@ -1083,21 +1088,22 @@ static int ci_fan_ctrl_get_fan_speed_percent(struct radeon_device *rdev,
        return 0;
 }
 
-static int ci_fan_ctrl_set_fan_speed_percent(struct radeon_device *rdev,
+int ci_fan_ctrl_set_fan_speed_percent(struct radeon_device *rdev,
                                             u32 speed)
 {
        u32 tmp;
        u32 duty, duty100;
        u64 tmp64;
+       struct ci_power_info *pi = ci_get_pi(rdev);
 
        if (rdev->pm.no_fan)
                return -ENOENT;
 
-       if (speed > 100)
+       if (pi->fan_is_controlled_by_smc)
                return -EINVAL;
 
-       if (rdev->pm.dpm.fan.ucode_fan_control)
-               ci_fan_ctrl_stop_smc_fan_control(rdev);
+       if (speed > 100)
+               return -EINVAL;
 
        duty100 = (RREG32_SMC(CG_FDO_CTRL1) & FMAX_DUTY100_MASK) >> FMAX_DUTY100_SHIFT;
 
@@ -1112,11 +1118,38 @@ static int ci_fan_ctrl_set_fan_speed_percent(struct radeon_device *rdev,
        tmp |= FDO_STATIC_DUTY(duty);
        WREG32_SMC(CG_FDO_CTRL0, tmp);
 
-       ci_fan_ctrl_set_static_mode(rdev, FDO_PWM_MODE_STATIC);
-
        return 0;
 }
 
+void ci_fan_ctrl_set_mode(struct radeon_device *rdev, u32 mode)
+{
+       if (mode) {
+               /* stop auto-manage */
+               if (rdev->pm.dpm.fan.ucode_fan_control)
+                       ci_fan_ctrl_stop_smc_fan_control(rdev);
+               ci_fan_ctrl_set_static_mode(rdev, mode);
+       } else {
+               /* restart auto-manage */
+               if (rdev->pm.dpm.fan.ucode_fan_control)
+                       ci_thermal_start_smc_fan_control(rdev);
+               else
+                       ci_fan_ctrl_set_default_mode(rdev);
+       }
+}
+
+u32 ci_fan_ctrl_get_mode(struct radeon_device *rdev)
+{
+       struct ci_power_info *pi = ci_get_pi(rdev);
+       u32 tmp;
+
+       if (pi->fan_is_controlled_by_smc)
+               return 0;
+
+       tmp = RREG32_SMC(CG_FDO_CTRL2) & FDO_PWM_MODE_MASK;
+       return (tmp >> FDO_PWM_MODE_SHIFT);
+}
+
+#if 0
 static int ci_fan_ctrl_get_fan_speed_rpm(struct radeon_device *rdev,
                                         u32 *speed)
 {

diff --git a/drivers/gpu/drm/radeon/ci_dpm.h b/drivers/gpu/drm/radeon/ci_dpm.h
index 84e3d3b..723220f 100644 (file)
--- a/drivers/gpu/drm/radeon/ci_dpm.h
+++ b/drivers/gpu/drm/radeon/ci_dpm.h
@@ -291,6 +291,7 @@ struct ci_power_info {
        struct ci_ps requested_ps;
        /* fan control */
        bool fan_ctrl_is_in_default_mode;
+       bool fan_is_controlled_by_smc;
        u32 t_min;
        u32 fan_ctrl_default_mode;
 };

diff --git a/drivers/gpu/drm/radeon/radeon_asic.c b/drivers/gpu/drm/radeon/radeon_asic.c
index 121aff6..c5ec523 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_asic.c
+++ b/drivers/gpu/drm/radeon/radeon_asic.c
@@ -2118,6 +2118,10 @@ static struct radeon_asic ci_asic = {
                .force_performance_level = &ci_dpm_force_performance_level,
                .vblank_too_short = &ci_dpm_vblank_too_short,
                .powergate_uvd = &ci_dpm_powergate_uvd,
+               .fan_ctrl_set_mode = &ci_fan_ctrl_set_mode,
+               .fan_ctrl_get_mode = &ci_fan_ctrl_get_mode,
+               .get_fan_speed_percent = &ci_fan_ctrl_get_fan_speed_percent,
+               .set_fan_speed_percent = &ci_fan_ctrl_set_fan_speed_percent,
        },
        .pflip = {
                .page_flip = &evergreen_page_flip,

diff --git a/drivers/gpu/drm/radeon/radeon_asic.h b/drivers/gpu/drm/radeon/radeon_asic.h
index 2a45d54..f918a8b 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_asic.h
+++ b/drivers/gpu/drm/radeon/radeon_asic.h
@@ -861,6 +861,13 @@ int ci_dpm_force_performance_level(struct radeon_device *rdev,
 bool ci_dpm_vblank_too_short(struct radeon_device *rdev);
 void ci_dpm_powergate_uvd(struct radeon_device *rdev, bool gate);
 
+int ci_fan_ctrl_get_fan_speed_percent(struct radeon_device *rdev,
+                                                u32 *speed);
+int ci_fan_ctrl_set_fan_speed_percent(struct radeon_device *rdev,
+                                                u32 speed);
+u32 ci_fan_ctrl_get_mode(struct radeon_device *rdev);
+void ci_fan_ctrl_set_mode(struct radeon_device *rdev, u32 mode);
+
 int kv_dpm_init(struct radeon_device *rdev);
 int kv_dpm_enable(struct radeon_device *rdev);
 int kv_dpm_late_enable(struct radeon_device *rdev);