drm/msm/a6xx: Improve gpu recovery sequence
We can do a few more things to improve our chance at a successful gpu
recovery, especially during a hangcheck timeout:
1. Halt CP and GMU core
2. Do RBBM GBIF HALT sequence
3. Do a soft reset of GPU core
Signed-off-by: Akhil P Oommen <quic_akhilpo@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/498400/
Link: https://lore.kernel.org/r/20220819015030.v5.6.Idf2ba51078e87ae7ceb75cc77a5bd4ff2bd31eab@changeid
Signed-off-by: Rob Clark <robdclark@chromium.org>
diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
index 2ea5fb3..fdc5780 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
@@ -988,6 +988,10 @@ static int hw_init(struct msm_gpu *gpu)
/* Make sure the GMU keeps the GPU on while we set it up */
a6xx_gmu_set_oob(&a6xx_gpu->gmu, GMU_OOB_GPU_SET);
+ /* Clear GBIF halt in case GX domain was not collapsed */
+ if (a6xx_has_gbif(adreno_gpu))
+ gpu_write(gpu, REG_A6XX_RBBM_GBIF_HALT, 0);
+
gpu_write(gpu, REG_A6XX_RBBM_SECVID_TSB_CNTL, 0);
/*
@@ -1273,6 +1277,9 @@ static void a6xx_recover(struct msm_gpu *gpu)
if (hang_debug)
a6xx_dump(gpu);
+ /* Halt SQE first */
+ gpu_write(gpu, REG_A6XX_CP_SQE_CNTL, 3);
+
/*
* Turn off keep alive that might have been enabled by the hang
* interrupt
