This is a note to let you know that I've just added the patch titled bus: ti-sysc: Ignore clockactivity unless specified as a quirk to the 5.7-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: bus-ti-sysc-ignore-clockactivity-unless-specified-as.patch and it can be found in the queue-5.7 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit a48ca4117edcb3e87e3ef78503cb928562181c74 Author: Tony Lindgren <tony@xxxxxxxxxxx> Date: Sun May 31 12:37:54 2020 -0700 bus: ti-sysc: Ignore clockactivity unless specified as a quirk [ Upstream commit 08b91dd6e547467fad61a7c201ff71080d7ad65a ] We must ignore the clockactivity bit for most modules and not set it unless specified for the module with SYSC_QUIRK_USE_CLOCKACT. Otherwise the interface clock can be automatically gated constantly causing unexpected performance issues. Fixes: ae9ae12e9daa ("bus: ti-sysc: Handle clockactivity for enable and disable") Cc: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> Cc: Tomi Valkeinen <tomi.valkeinen@xxxxxx> Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c index a3a2c269e9ad7..4f640a635ded1 100644 --- a/drivers/bus/ti-sysc.c +++ b/drivers/bus/ti-sysc.c @@ -988,10 +988,13 @@ static int sysc_enable_module(struct device *dev) regbits = ddata->cap->regbits; reg = sysc_read(ddata, ddata->offsets[SYSC_SYSCONFIG]); - /* Set CLOCKACTIVITY, we only use it for ick */ + /* + * Set CLOCKACTIVITY, we only use it for ick. And we only configure it + * based on the SYSC_QUIRK_USE_CLOCKACT flag, not based on the hardware + * capabilities. See the old HWMOD_SET_DEFAULT_CLOCKACT flag. + */ if (regbits->clkact_shift >= 0 && - (ddata->cfg.quirks & SYSC_QUIRK_USE_CLOCKACT || - ddata->cfg.sysc_val & BIT(regbits->clkact_shift))) + (ddata->cfg.quirks & SYSC_QUIRK_USE_CLOCKACT)) reg |= SYSC_CLOCACT_ICK << regbits->clkact_shift; /* Set SIDLE mode */