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media: venus: Fix occasionally failures to suspend 

Failure to suspend (venus_suspend_3xx) happens when the system
is fresh booted and loading venus driver. This happens once and
after reload the venus driver modules the problem disrepair.

Fix the failure by skipping the check for WFI and IDLE bits if
PC_READY is on in control status register.

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
alistair/sunxi64-5.5-dsi
Stanimir Varbanov 2019-09-17 09:02:26 -03:00 committed by Mauro Carvalho Chehab
parent 32f0a6ddc8
commit 8dbebb2bd0
1 changed files with 6 additions and 0 deletions
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6
drivers/media/platform/qcom/venus/hfi_venus.c
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@ -1472,6 +1472,7 @@ static int venus_suspend_3xx(struct venus_core *core)
{
struct venus_hfi_device *hdev = to_hfi_priv(core);
struct device *dev = core->dev;
u32 ctrl_status;
bool val;
int ret;
@ -1487,6 +1488,10 @@ static int venus_suspend_3xx(struct venus_core *core)
return -EINVAL;
}
ctrl_status = venus_readl(hdev, CPU_CS_SCIACMDARG0);
if (ctrl_status & CPU_CS_SCIACMDARG0_PC_READY)
goto power_off;
/*
* Power collapse sequence for Venus 3xx and 4xx versions:
* 1. Check for ARM9 and video core to be idle by checking WFI bit
@ -1511,6 +1516,7 @@ static int venus_suspend_3xx(struct venus_core *core)
if (ret)
return ret;
power_off:
mutex_lock(&hdev->lock);
ret = venus_power_off(hdev);