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| author | Evan Quan <evan.quan@amd.com> | 2021-02-10 10:16:08 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2021-08-16 15:35:56 -0400 |
| commit | 0d8318e11203c2d1ec54ae9a4aad71fb0ecf9c36 (patch) | |
| tree | 5de774bf887cdbbba151f350b16ae15f2cfe55f0 /drivers/gpu/drm/amd/pm/powerplay/si_dpm.c | |
| parent | d9ca7567b864322b9fd13b0d29ed510b80bba2f0 (diff) | |
| download | lwn-0d8318e11203c2d1ec54ae9a4aad71fb0ecf9c36.tar.gz lwn-0d8318e11203c2d1ec54ae9a4aad71fb0ecf9c36.zip | |
drm/amd/pm: drop the unnecessary intermediate percent-based transition
Currently, the readout of fan speed pwm is transited into percent-based
and then pwm-based. However, the transition into percent-based is totally
unnecessary and make the final output less accurate.
Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/pm/powerplay/si_dpm.c')
| -rw-r--r-- | drivers/gpu/drm/amd/pm/powerplay/si_dpm.c | 19 |
1 files changed, 8 insertions, 11 deletions
diff --git a/drivers/gpu/drm/amd/pm/powerplay/si_dpm.c b/drivers/gpu/drm/amd/pm/powerplay/si_dpm.c index 15c0b8af376f..bdbbeb959c68 100644 --- a/drivers/gpu/drm/amd/pm/powerplay/si_dpm.c +++ b/drivers/gpu/drm/amd/pm/powerplay/si_dpm.c @@ -6539,7 +6539,7 @@ static int si_fan_ctrl_stop_smc_fan_control(struct amdgpu_device *adev) } } -static int si_dpm_get_fan_speed_percent(void *handle, +static int si_dpm_get_fan_speed_pwm(void *handle, u32 *speed) { u32 duty, duty100; @@ -6555,17 +6555,14 @@ static int si_dpm_get_fan_speed_percent(void *handle, if (duty100 == 0) return -EINVAL; - tmp64 = (u64)duty * 100; + tmp64 = (u64)duty * 255; do_div(tmp64, duty100); - *speed = (u32)tmp64; - - if (*speed > 100) - *speed = 100; + *speed = MIN((u32)tmp64, 255); return 0; } -static int si_dpm_set_fan_speed_percent(void *handle, +static int si_dpm_set_fan_speed_pwm(void *handle, u32 speed) { struct amdgpu_device *adev = (struct amdgpu_device *)handle; @@ -6580,7 +6577,7 @@ static int si_dpm_set_fan_speed_percent(void *handle, if (si_pi->fan_is_controlled_by_smc) return -EINVAL; - if (speed > 100) + if (speed > 255) return -EINVAL; duty100 = (RREG32(CG_FDO_CTRL1) & FMAX_DUTY100_MASK) >> FMAX_DUTY100_SHIFT; @@ -6589,7 +6586,7 @@ static int si_dpm_set_fan_speed_percent(void *handle, return -EINVAL; tmp64 = (u64)speed * duty100; - do_div(tmp64, 100); + do_div(tmp64, 255); duty = (u32)tmp64; tmp = RREG32(CG_FDO_CTRL0) & ~FDO_STATIC_DUTY_MASK; @@ -8059,8 +8056,8 @@ static const struct amd_pm_funcs si_dpm_funcs = { .vblank_too_short = &si_dpm_vblank_too_short, .set_fan_control_mode = &si_dpm_set_fan_control_mode, .get_fan_control_mode = &si_dpm_get_fan_control_mode, - .set_fan_speed_percent = &si_dpm_set_fan_speed_percent, - .get_fan_speed_percent = &si_dpm_get_fan_speed_percent, + .set_fan_speed_pwm = &si_dpm_set_fan_speed_pwm, + .get_fan_speed_pwm = &si_dpm_get_fan_speed_pwm, .check_state_equal = &si_check_state_equal, .get_vce_clock_state = amdgpu_get_vce_clock_state, .read_sensor = &si_dpm_read_sensor, |