From: Rob Clark robdclark@chromium.org
To avoid preventing the display from coming up before the rootfs is mounted, without resorting to packing fw in the initrd, the GPU has this limbo state where the device is probed, but we aren't ready to start sending commands to it. This is particularly problematic for a6xx, since the GMU (which requires fw to be loaded) is the one that is controlling the power/clk/icc votes.
So defer enabling runpm until we are ready to call gpu->hw_init(), as that is a point where we know we have all the needed fw and are ready to start sending commands to the coproc's.
Signed-off-by: Rob Clark robdclark@chromium.org --- drivers/gpu/drm/msm/adreno/adreno_device.c | 6 ++++++ drivers/gpu/drm/msm/adreno/adreno_gpu.c | 1 - 2 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/msm/adreno/adreno_device.c b/drivers/gpu/drm/msm/adreno/adreno_device.c index 8706bcdd1472..7cef8ae73c71 100644 --- a/drivers/gpu/drm/msm/adreno/adreno_device.c +++ b/drivers/gpu/drm/msm/adreno/adreno_device.c @@ -415,6 +415,12 @@ struct msm_gpu *adreno_load_gpu(struct drm_device *dev) if (ret) return NULL;
+ /* + * Now that we have firmware loaded, and are ready to begin + * booting the gpu, go ahead and enable runpm: + */ + pm_runtime_enable(&pdev->dev); + /* Make sure pm runtime is active and reset any previous errors */ pm_runtime_set_active(&pdev->dev);
diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c index 4e665c806a14..e1aef4875e2f 100644 --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c @@ -1042,7 +1042,6 @@ int adreno_gpu_init(struct drm_device *drm, struct platform_device *pdev, pm_runtime_set_autosuspend_delay(dev, adreno_gpu->info->inactive_period); pm_runtime_use_autosuspend(dev); - pm_runtime_enable(dev);
return msm_gpu_init(drm, pdev, &adreno_gpu->base, &funcs->base, gpu_name, &adreno_gpu_config);