On 25/04/2022 04:05, Rex-BC Chen wrote:
On Sun, 2022-04-24 at 10:57 +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.
I'm not sure what you mean with this sentence. But it sound's like we want to
paper about some issue. Can you please explain better?
Thanks,
Matthias
Fixes: 1f022d84bd19 ("soc: mediatek: Add PMIC wrapper for MT8135 and
MT8173 SoCs")
Signed-off-by: Zhiyong.Tao <zhiyong.tao@xxxxxxxxxxxx>
---
Hello Zhiyong,
IMO, commit messages should be
Fix pwrap FSM timeout issue....
...we change it after sleep delay.
(=> one blank)
Fixes: 1f022d84bd19 ("soc: mediatek: Add PMIC wrapper for MT8135 and
MT8173 SoCs")
(=> oneline)
Signed-off-by: Zhiyong.Tao <zhiyong.tao@xxxxxxxxxxxx>
drivers/soc/mediatek/mtk-pmic-wrap.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/soc/mediatek/mtk-pmic-wrap.c
b/drivers/soc/mediatek/mtk-pmic-wrap.c
index 952bc554f443..ac7139a67e87 100644
--- 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>
Sorry, I do not notice this in previous version. It will proper order
the header in alphabet.
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/reset.h>
BRs,
Rex
#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);
}
