From ebeacb1f612db22020561211c21b4d966cf7ca24 Mon Sep 17 00:00:00 2001 From: Dmitry Osipenko Date: Wed, 24 Jun 2020 17:08:47 +0200 Subject: [PATCH] media: staging: tegra-vde: Power-cycle hardware on probe VDE partition is left turned ON after bootloader on most devices, hence let's ensure that it's turned OFF in order to lower power leakage while hardware is idling by turning it ON and OFF during of the driver's probe. Signed-off-by: Dmitry Osipenko Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/staging/media/tegra-vde/vde.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/staging/media/tegra-vde/vde.c b/drivers/staging/media/tegra-vde/vde.c index 3dcf5eab6b18..a3c24d96d5b9 100644 --- a/drivers/staging/media/tegra-vde/vde.c +++ b/drivers/staging/media/tegra-vde/vde.c @@ -1064,6 +1064,14 @@ static int tegra_vde_probe(struct platform_device *pdev) pm_runtime_use_autosuspend(dev); pm_runtime_set_autosuspend_delay(dev, 300); + /* + * VDE partition may be left ON after bootloader, hence let's + * power-cycle it in order to put hardware into a predictable lower + * power state. + */ + pm_runtime_get_sync(dev); + pm_runtime_put(dev); + return 0; err_deinit_iommu: