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drm/radeon: Add ability to get and change dpm state when radeon PX card is turned off 

This fixing commit 4f2f203976

bug:
https://bugzilla.kernel.org/show_bug.cgi?id=76321

Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Pali Rohár 2014-08-11 19:01:58 +02:00 committed by Alex Deucher
parent 6bce8d9772
commit b07a657e3a
1 changed files with 6 additions and 10 deletions
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16
drivers/gpu/drm/radeon/radeon_pm.c
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@ -460,10 +460,6 @@ static ssize_t radeon_get_dpm_state(struct device *dev,
struct radeon_device *rdev = ddev->dev_private;
enum radeon_pm_state_type pm = rdev->pm.dpm.user_state;
if ((rdev->flags & RADEON_IS_PX) &&
(ddev->switch_power_state != DRM_SWITCH_POWER_ON))
return snprintf(buf, PAGE_SIZE, "off\n");
return snprintf(buf, PAGE_SIZE, "%s\n",
(pm == POWER_STATE_TYPE_BATTERY) ? "battery" :
(pm == POWER_STATE_TYPE_BALANCED) ? "balanced" : "performance");
@ -477,11 +473,6 @@ static ssize_t radeon_set_dpm_state(struct device *dev,
struct drm_device *ddev = dev_get_drvdata(dev);
struct radeon_device *rdev = ddev->dev_private;
/* Can't set dpm state when the card is off */
if ((rdev->flags & RADEON_IS_PX) &&
(ddev->switch_power_state != DRM_SWITCH_POWER_ON))
return -EINVAL;
mutex_lock(&rdev->pm.mutex);
if (strncmp("battery", buf, strlen("battery")) == 0)
rdev->pm.dpm.user_state = POWER_STATE_TYPE_BATTERY;
@ -495,7 +486,12 @@ static ssize_t radeon_set_dpm_state(struct device *dev,
goto fail;
}
mutex_unlock(&rdev->pm.mutex);
radeon_pm_compute_clocks(rdev);
/* Can't set dpm state when the card is off */
if (!(rdev->flags & RADEON_IS_PX) ||
(ddev->switch_power_state == DRM_SWITCH_POWER_ON))
radeon_pm_compute_clocks(rdev);
fail:
return count;
}