This is a note to let you know that I've just added the patch titled media: marvell-ccic: power up the device on mclk enable to the 5.10-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: media-marvell-ccic-power-up-the-device-on-mclk-enable.patch and it can be found in the queue-5.10 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 655ae29da72a693cf294bba3c3322e662ff75bd3 Mon Sep 17 00:00:00 2001 From: Lubomir Rintel <lkundrak@xxxxx> Date: Wed, 27 Jan 2021 19:01:43 +0100 Subject: media: marvell-ccic: power up the device on mclk enable From: Lubomir Rintel <lkundrak@xxxxx> commit 655ae29da72a693cf294bba3c3322e662ff75bd3 upstream. Writing to REG_CLKCTRL with the power off causes a hang. Enable the device first. Cc: stable@xxxxxxxxxxxxxxx # 5.10+ Signed-off-by: Lubomir Rintel <lkundrak@xxxxx> Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/media/platform/marvell-ccic/mcam-core.c | 2 ++ 1 file changed, 2 insertions(+) --- 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 * 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, Patches currently in stable-queue which might be from lkundrak@xxxxx are queue-5.10/media-marvell-ccic-power-up-the-device-on-mclk-enable.patch