drm/msm/adreno: Call pm_runtime_force_suspend() during unbind

The GPU specific pm_suspend code assumes that the hardware is active
when the function is called, which it usually is when called as part
of pm_runtime.  But during unbind, the pm_suspend functions are called
blindly resulting in a bit of a when the hardware wasn't already
active (or booted, in the case of the GMU).

Instead of calling the pm_suspend function directly, use
pm_runtime_force_suspend() which should check the correct state of
runtime and call the functions on our behalf or skip them if they are
not needed.
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>

drivers/gpu/drm/msm/adreno/a6xx_gmu.c

@@ -1232,9 +1232,7 @@ void a6xx_gmu_remove(struct a6xx_gpu *a6xx_gpu)
 	if (!gmu->initialized)
 		return;
 
-	a6xx_gmu_stop(a6xx_gpu);
-
-	pm_runtime_disable(gmu->dev);
+	pm_runtime_force_suspend(gmu->dev);
 
 	if (!IS_ERR_OR_NULL(gmu->gxpd)) {
 		pm_runtime_disable(gmu->gxpd);

drivers/gpu/drm/msm/adreno/adreno_device.c

@@ -351,7 +351,7 @@ static void adreno_unbind(struct device *dev, struct device *master,
 {
 	struct msm_gpu *gpu = dev_get_drvdata(dev);
 
-	gpu->funcs->pm_suspend(gpu);
+	pm_runtime_force_suspend(dev);
 	gpu->funcs->destroy(gpu);
 
 	set_gpu_pdev(dev_get_drvdata(master), NULL);