[PATCH v1 07/10] drm/msm/adreno: Retry on gpu resume failure

[Akhil P Oommen]

Retry infinitely on resume failure because there is nothing much we can
do if GPU is not ON. Also, this helps us to avoid checking for the
return value of pm_runtime_get() to see if GPU is ON.

Signed-off-by: Akhil P Oommen <quic_akhilpo at quicinc.com>
---

 drivers/gpu/drm/msm/adreno/adreno_device.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/adreno/adreno_device.c b/drivers/gpu/drm/msm/adreno/adreno_device.c
index 89cfd84..abcc553 100644
--- a/drivers/gpu/drm/msm/adreno/adreno_device.c
+++ b/drivers/gpu/drm/msm/adreno/adreno_device.c
@@ -603,8 +603,16 @@ static const struct of_device_id dt_match[] = {
 static int adreno_resume(struct device *dev)
 {
 	struct msm_gpu *gpu = dev_to_gpu(dev);
+	int ret;
+
+	/* What hope do we have for the future if we can't turn ON gpu */
+	while (true) {
+		ret = gpu->funcs->pm_resume(gpu);
+		if (!ret)
+			break;
+	}
 
-	return gpu->funcs->pm_resume(gpu);
+	return 0;
 }
 
 static int active_submits(struct msm_gpu *gpu)
-- 
2.7.4