[PATCH 5/5] drm/amdgpu: Disable sysfs pwm1 if not in manual fan control

[Quan, Evan]

Series is Reviewed-by: Evan Quan <evan.quan at amd.com>

> -----Original Message-----
> From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> On Behalf Of Rex
> Zhu
> Sent: 2018年9月30日 14:18
> To: amd-gfx at lists.freedesktop.org
> Cc: Zhu, Rex <Rex.Zhu at amd.com>
> Subject: [PATCH 5/5] drm/amdgpu: Disable sysfs pwm1 if not in manual fan
> control
> 
> Following lm-sensors 3.0.0,
> Only enable pwm1 sysfs when fan control mode(pwm1_enable) in manual
> 
> Signed-off-by: Rex Zhu <Rex.Zhu at amd.com>
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
> index 1d85706..d6bd5ab 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
> @@ -1120,12 +1120,19 @@ static ssize_t amdgpu_hwmon_set_pwm1(struct
> device *dev,
>  	struct amdgpu_device *adev = dev_get_drvdata(dev);
>  	int err;
>  	u32 value;
> +	u32 pwm_mode;
> 
>  	/* Can't adjust fan when the card is off */
>  	if  ((adev->flags & AMD_IS_PX) &&
>  	     (adev->ddev->switch_power_state !=
> DRM_SWITCH_POWER_ON))
>  		return -EINVAL;
> 
> +	pwm_mode = amdgpu_dpm_get_fan_control_mode(adev);
> +	if (pwm_mode != AMD_FAN_CTRL_MANUAL) {
> +		pr_info("manual fan speed control should be enabled
> first\n");
> +		return -EINVAL;
> +	}
> +
>  	err = kstrtou32(buf, 10, &value);
>  	if (err)
>  		return err;
> --
> 1.9.1
> 
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