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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Alex Deucher <alexander.deucher@amd.com>
Subject: [PATCH 4.15 028/146] Revert "drm/radeon/pm: autoswitch power state when in balanced mode"
Date:   Tue, 13 Mar 2018 16:23:15 +0100
Message-Id: <20180313152322.681532066@linuxfoundation.org>
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4.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Alex Deucher <alexander.deucher@amd.com>

commit 53bf277b487eb5ae6695db01bede0fe406792119 upstream.

This reverts commit 1c331f75aa6ccbf64ebcc5a019183e617c9d818a.

Breaks resume on some systems.

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=100759
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/gpu/drm/radeon/radeon_pm.c |    6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

--- a/drivers/gpu/drm/radeon/radeon_pm.c
+++ b/drivers/gpu/drm/radeon/radeon_pm.c
@@ -47,7 +47,6 @@ static bool radeon_pm_in_vbl(struct rade
 static bool radeon_pm_debug_check_in_vbl(struct radeon_device *rdev, bool finish);
 static void radeon_pm_update_profile(struct radeon_device *rdev);
 static void radeon_pm_set_clocks(struct radeon_device *rdev);
-static void radeon_pm_compute_clocks_dpm(struct radeon_device *rdev);
 
 int radeon_pm_get_type_index(struct radeon_device *rdev,
 			     enum radeon_pm_state_type ps_type,
@@ -80,8 +79,6 @@ void radeon_pm_acpi_event_handler(struct
 				radeon_dpm_enable_bapm(rdev, rdev->pm.dpm.ac_power);
 		}
 		mutex_unlock(&rdev->pm.mutex);
-		/* allow new DPM state to be picked */
-		radeon_pm_compute_clocks_dpm(rdev);
 	} else if (rdev->pm.pm_method == PM_METHOD_PROFILE) {
 		if (rdev->pm.profile == PM_PROFILE_AUTO) {
 			mutex_lock(&rdev->pm.mutex);
@@ -885,8 +882,7 @@ static struct radeon_ps *radeon_dpm_pick
 		dpm_state = POWER_STATE_TYPE_INTERNAL_3DPERF;
 	/* balanced states don't exist at the moment */
 	if (dpm_state == POWER_STATE_TYPE_BALANCED)
-		dpm_state = rdev->pm.dpm.ac_power ?
-			POWER_STATE_TYPE_PERFORMANCE : POWER_STATE_TYPE_BATTERY;
+		dpm_state = POWER_STATE_TYPE_PERFORMANCE;
 
 restart_search:
 	/* Pick the best power state based on current conditions */