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.
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
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);
}
--
2.18.0
