Commit 5e8150a6 authored by Alex Deucher's avatar Alex Deucher
Browse files

drm/radeon: bind fan control on SI cards to hwmon interface 



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

Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 36689e57

drivers/gpu/drm/radeon/radeon_asic.c

+4 −0
Original line number Diff line number Diff line
@@ -1953,6 +1953,10 @@ static struct radeon_asic si_asic = { 
		.debugfs_print_current_performance_level = &si_dpm_debugfs_print_current_performance_level,

		.force_performance_level = &si_dpm_force_performance_level,

		.vblank_too_short = &ni_dpm_vblank_too_short,

		.fan_ctrl_set_mode = &si_fan_ctrl_set_mode,

		.fan_ctrl_get_mode = &si_fan_ctrl_get_mode,

		.get_fan_speed_percent = &si_fan_ctrl_get_fan_speed_percent,

		.set_fan_speed_percent = &si_fan_ctrl_set_fan_speed_percent,

	},

	.pflip = {

		.page_flip = &evergreen_page_flip,

drivers/gpu/drm/radeon/radeon_asic.h

+6 −0
Original line number Diff line number Diff line
@@ -744,6 +744,12 @@ void si_dpm_debugfs_print_current_performance_level(struct radeon_device *rdev, 
						    struct seq_file *m);

int si_dpm_force_performance_level(struct radeon_device *rdev,

				   enum radeon_dpm_forced_level level);

int si_fan_ctrl_get_fan_speed_percent(struct radeon_device *rdev,

						 u32 *speed);

int si_fan_ctrl_set_fan_speed_percent(struct radeon_device *rdev,

						 u32 speed);

u32 si_fan_ctrl_get_mode(struct radeon_device *rdev);

void si_fan_ctrl_set_mode(struct radeon_device *rdev, u32 mode);



/* DCE8 - CIK */

void dce8_bandwidth_update(struct radeon_device *rdev);

drivers/gpu/drm/radeon/si_dpm.c

+51 −14
Original line number Diff line number Diff line
@@ -1756,6 +1756,9 @@ static int si_calculate_sclk_params(struct radeon_device *rdev, 
				    u32 engine_clock,

				    SISLANDS_SMC_SCLK_VALUE *sclk);



static void si_thermal_start_smc_fan_control(struct radeon_device *rdev);

static void si_fan_ctrl_set_default_mode(struct radeon_device *rdev);



static struct si_power_info *si_get_pi(struct radeon_device *rdev)

{

        struct si_power_info *pi = rdev->pm.dpm.priv;
@@ -6012,36 +6015,46 @@ static int si_thermal_setup_fan_table(struct radeon_device *rdev) 


static int si_fan_ctrl_start_smc_fan_control(struct radeon_device *rdev)

{

	struct si_power_info *si_pi = si_get_pi(rdev);

	PPSMC_Result ret;



	ret = si_send_msg_to_smc(rdev, PPSMC_StartFanControl);

	if (ret == PPSMC_Result_OK)

	if (ret == PPSMC_Result_OK) {

		si_pi->fan_is_controlled_by_smc = true;

		return 0;

	else

	} else {

		return -EINVAL;

	}

}



static int si_fan_ctrl_stop_smc_fan_control(struct radeon_device *rdev)

{

	struct si_power_info *si_pi = si_get_pi(rdev);

	PPSMC_Result ret;



	ret = si_send_msg_to_smc(rdev, PPSMC_StopFanControl);

	if (ret == PPSMC_Result_OK)



	if (ret == PPSMC_Result_OK) {

		si_pi->fan_is_controlled_by_smc = false;

		return 0;

	else

	} else {

		return -EINVAL;

	}

}



#if 0

static int si_fan_ctrl_get_fan_speed_percent(struct radeon_device *rdev,

int si_fan_ctrl_get_fan_speed_percent(struct radeon_device *rdev,

				      u32 *speed)

{

	struct si_power_info *si_pi = si_get_pi(rdev);

	u32 duty, duty100;

	u64 tmp64;



	if (rdev->pm.no_fan)

		return -ENOENT;



	if (si_pi->fan_is_controlled_by_smc)

 		return -EINVAL;



	duty100 = (RREG32(CG_FDO_CTRL1) & FMAX_DUTY100_MASK) >> FMAX_DUTY100_SHIFT;

	duty = (RREG32(CG_THERMAL_STATUS) & FDO_PWM_DUTY_MASK) >> FDO_PWM_DUTY_SHIFT;
@@ -6058,7 +6071,7 @@ static int si_fan_ctrl_get_fan_speed_percent(struct radeon_device *rdev, 
	return 0;

}



static int si_fan_ctrl_set_fan_speed_percent(struct radeon_device *rdev,

int si_fan_ctrl_set_fan_speed_percent(struct radeon_device *rdev,

				      u32 speed)

{

	u32 tmp;
@@ -6071,9 +6084,6 @@ static int si_fan_ctrl_set_fan_speed_percent(struct radeon_device *rdev, 
	if (speed > 100)

		return -EINVAL;



	if (rdev->pm.dpm.fan.ucode_fan_control)

		si_fan_ctrl_stop_smc_fan_control(rdev);



	duty100 = (RREG32(CG_FDO_CTRL1) & FMAX_DUTY100_MASK) >> FMAX_DUTY100_SHIFT;



	if (duty100 == 0)
@@ -6087,11 +6097,38 @@ static int si_fan_ctrl_set_fan_speed_percent(struct radeon_device *rdev, 
	tmp |= FDO_STATIC_DUTY(duty);

	WREG32(CG_FDO_CTRL0, tmp);



	si_fan_ctrl_set_static_mode(rdev, FDO_PWM_MODE_STATIC);

	return 0;

}



void si_fan_ctrl_set_mode(struct radeon_device *rdev, u32 mode)

{

	if (mode) {

		/* stop auto-manage */

		if (rdev->pm.dpm.fan.ucode_fan_control)

			si_fan_ctrl_stop_smc_fan_control(rdev);

		si_fan_ctrl_set_static_mode(rdev, mode);

	} else {

		/* restart auto-manage */

		if (rdev->pm.dpm.fan.ucode_fan_control)

			si_thermal_start_smc_fan_control(rdev);

		else

			si_fan_ctrl_set_default_mode(rdev);

	}

}



u32 si_fan_ctrl_get_mode(struct radeon_device *rdev)

{

	struct si_power_info *si_pi = si_get_pi(rdev);

	u32 tmp;



	if (si_pi->fan_is_controlled_by_smc)

		return 0;



	tmp = RREG32(CG_FDO_CTRL2) & FDO_PWM_MODE_MASK;

	return (tmp >> FDO_PWM_MODE_SHIFT);

}



#if 0

static int si_fan_ctrl_get_fan_speed_rpm(struct radeon_device *rdev,

					 u32 *speed)

{

drivers/gpu/drm/radeon/si_dpm.h

+1 −0
Original line number Diff line number Diff line
@@ -202,6 +202,7 @@ struct si_power_info { 
	bool fan_ctrl_is_in_default_mode;

	u32 t_min;

	u32 fan_ctrl_default_mode;

	bool fan_is_controlled_by_smc;

};



#define SISLANDS_INITIAL_STATE_ARB_INDEX    0

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