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drm/radeon/kms/pm: track current voltage (v2)

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track the current voltage level and avoid setting it
if the requested voltage is already set.

v2: check voltage type before checking current voltage

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Alex Deucher
2010-06-07 18:15:18 -04:00
committed by Dave Airlie
parent aa1df0f229
commit 4d60173fc1
6 changed files with 22 additions and 7 deletions
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9
drivers/gpu/drm/radeon/rv770.c
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@@ -48,8 +48,13 @@ void rv770_pm_misc(struct radeon_device *rdev)
struct radeon_power_state *ps = &rdev->pm.power_state[requested_index];
struct radeon_voltage *voltage = &ps->clock_info[0].voltage;
if ((voltage->type == VOLTAGE_SW) && voltage->voltage)
radeon_atom_set_voltage(rdev, voltage->voltage);
if ((voltage->type == VOLTAGE_SW) && voltage->voltage) {
if (voltage->voltage != rdev->pm.current_vddc) {
radeon_atom_set_voltage(rdev, voltage->voltage);
rdev->pm.current_vddc = voltage->voltage;
}
}
}
/*