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Subject: media: marvell-ccic: power up the device on mclk enable Author: Lubomir Rintel lkundrak@v3.sk Date: Wed Jan 27 19:01:43 2021 +0100

Writing to REG_CLKCTRL with the power off causes a hang. Enable the device first.

Cc: stable@vger.kernel.org # 5.10+ Signed-off-by: Lubomir Rintel lkundrak@v3.sk Signed-off-by: Sakari Ailus sakari.ailus@linux.intel.com Signed-off-by: Mauro Carvalho Chehab mchehab+huawei@kernel.org

drivers/media/platform/marvell-ccic/mcam-core.c | 2 ++ 1 file changed, 2 insertions(+)

---

diff --git a/drivers/media/platform/marvell-ccic/mcam-core.c b/drivers/media/platform/marvell-ccic/mcam-core.c index 153277e4fe80..141bf5d97a04 100644 --- a/drivers/media/platform/marvell-ccic/mcam-core.c +++ b/drivers/media/platform/marvell-ccic/mcam-core.c @@ -931,6 +931,7 @@ static int mclk_enable(struct clk_hw *hw) mclk_div = 2; }

+ pm_runtime_get_sync(cam->dev); clk_enable(cam->clk[0]); mcam_reg_write(cam, REG_CLKCTRL, (mclk_src << 29) | mclk_div); mcam_ctlr_power_up(cam); @@ -944,6 +945,7 @@ static void mclk_disable(struct clk_hw *hw)

mcam_ctlr_power_down(cam); clk_disable(cam->clk[0]); + pm_runtime_put(cam->dev); }

static unsigned long mclk_recalc_rate(struct clk_hw *hw,