On Fri, 2022-04-22 at 11:34 +0800, Zhiyong Tao wrote:
> From: "Zhiyong.Tao" <zhiyong.tao@xxxxxxxxxxxx>
>
> Fix pwrap FSM timeout issue which leads the system crash on GFX VSRAM
> power on.
> Add a usleep delay to avoid busy read for the H/W status.
> For avoiding the system behavior(ex. disable interrupt in
> suspend/resume
> flow, schedule block task)cause if (time_after()) be turn first,
> we change it after sleep delay.
>
Hello Zhiyong,
if this is a fix patch.
IMO, you should add Fixes tag:
Fixes: 1f022d84bd19 ("soc: mediatek: Add PMIC wrapper for MT8135 and
MT8173 SoCs")
> Signed-off-by: Zhiyong.Tao <zhiyong.tao@xxxxxxxxxxxx>
> ---
> drivers/soc/mediatek/mtk-pmic-wrap.c | 8 ++++++--
> 1 file changed, 6 insertions(+), 2 deletions(-)
> mode change 100644 => 100755 drivers/soc/mediatek/mtk-pmic-wrap.c
>
File mode should be 100644.
BRs,
Rex
> diff --git a/drivers/soc/mediatek/mtk-pmic-wrap.c
> b/drivers/soc/mediatek/mtk-pmic-wrap.c
> old mode 100644
> new mode 100755
> index 952bc554f443..ac7139a67e87
> --- a/drivers/soc/mediatek/mtk-pmic-wrap.c
> +++ b/drivers/soc/mediatek/mtk-pmic-wrap.c
> @@ -12,6 +12,7 @@
> #include <linux/platform_device.h>
> #include <linux/regmap.h>
> #include <linux/reset.h>
> +#include <linux/delay.h>
>
> #define PWRAP_MT8135_BRIDGE_IORD_ARB_EN 0x4
> #define PWRAP_MT8135_BRIDGE_WACS3_EN 0x10
> @@ -1197,10 +1198,13 @@ static int pwrap_wait_for_state(struct
> pmic_wrapper *wrp,
> timeout = jiffies + usecs_to_jiffies(10000);
>
> do {
> - if (time_after(jiffies, timeout))
> - return fp(wrp) ? 0 : -ETIMEDOUT;
> if (fp(wrp))
> return 0;
> +
> + usleep_range(10, 11);
> +
> + if (time_after(jiffies, timeout))
> + return fp(wrp) ? 0 : -ETIMEDOUT;
> } while (1);
> }
>
