From 541de4c9c953438b677c31072e7762115ac11299 Mon Sep 17 00:00:00 2001 From: Archit Taneja Date: Fri, 28 Jul 2017 16:17:08 +0530 Subject: [PATCH] drm/msm/adreno: Prevent unclocked access when retrieving timestamps msm_gpu's get_timestamp() op (called by the MSM_GET_PARAM ioctl) can result in register accesses. We need our power domain and clocks to be active for that. Make sure they are enabled here. Signed-off-by: Archit Taneja Signed-off-by: Rob Clark --- drivers/gpu/drm/msm/adreno/adreno_gpu.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c index f1ab270..7414c6b 100644 --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c @@ -48,8 +48,15 @@ int adreno_get_param(struct msm_gpu *gpu, uint32_t param, uint64_t *value) *value = adreno_gpu->base.fast_rate; return 0; case MSM_PARAM_TIMESTAMP: - if (adreno_gpu->funcs->get_timestamp) - return adreno_gpu->funcs->get_timestamp(gpu, value); + if (adreno_gpu->funcs->get_timestamp) { + int ret; + + pm_runtime_get_sync(&gpu->pdev->dev); + ret = adreno_gpu->funcs->get_timestamp(gpu, value); + pm_runtime_put_autosuspend(&gpu->pdev->dev); + + return ret; + } return -EINVAL; default: DBG("%s: invalid param: %u", gpu->name, param); -- 2.7.4