gpu: nvgpu: Initialize PMU ucode only once

Initialize PMU ucode only once, and skip on next GPU boot.

Bug 1528275

Change-Id: Ifb95edb380518fae48fdc3b90b00b450fe30c439
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/428897
Reviewed-by: Shridhar Rasal <srasal@nvidia.com>

1 files changed, 8 insertions, 5 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/pmu_gk20a.c b/drivers/gpu/nvgpu/gk20a/pmu_gk20a.c
index de16e403..45087094 100644
--- a/drivers/gpu/nvgpu/gk20a/pmu_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/pmu_gk20a.c
@@ -1542,12 +1542,15 @@ static int gk20a_prepare_ucode(struct gk20a *g)
         void *ucode_ptr;
         DEFINE_DMA_ATTRS(attrs);
 
+        if (g->pmu_fw) {
+                gk20a_init_pmu(pmu);
+                return 0;
+        }
+
+        g->pmu_fw = gk20a_request_firmware(g, GK20A_PMU_UCODE_IMAGE);
         if (!g->pmu_fw) {
-                g->pmu_fw = gk20a_request_firmware(g, GK20A_PMU_UCODE_IMAGE);
-                if (!g->pmu_fw) {
-                        gk20a_err(d, "failed to load pmu ucode!!");
-                        return err;
-                }
+                gk20a_err(d, "failed to load pmu ucode!!");
+                return err;
         }
 
         gk20a_dbg_fn("firmware loaded");