[PATCH 2/4] drm/bridge: lontium-lt9611c: Increase MCU poll timeout to 200ms
From: Mohit Dsor
Date: Wed Jun 10 2026 - 17:17:07 EST
The on-chip MCU may take longer than 100ms to respond on some hardware
variants or slower I2C buses, causing spurious -ETIMEDOUT errors during
normal operation. Double the poll timeout from 100ms to 200ms to improve
reliability without changing the poll interval.
Signed-off-by: Mohit Dsor <mohit.dsor@xxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/bridge/lontium-lt9611c.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/bridge/lontium-lt9611c.c b/drivers/gpu/drm/bridge/lontium-lt9611c.c
index cb584855fd8f..b0402726367e 100644
--- a/drivers/gpu/drm/bridge/lontium-lt9611c.c
+++ b/drivers/gpu/drm/bridge/lontium-lt9611c.c
@@ -97,7 +97,7 @@ static int lt9611c_read_write_flow(struct lt9611c *lt9611c, u8 *params,
regmap_write(lt9611c->regmap, 0xe0de, 0x01);
ret = regmap_read_poll_timeout(lt9611c->regmap, 0xe0ae, temp,
- temp == 0x01, 1000, 100 * 1000);
+ temp == 0x01, 1000, 200 * 1000);
if (ret)
return -ETIMEDOUT;
@@ -107,7 +107,7 @@ static int lt9611c_read_write_flow(struct lt9611c *lt9611c, u8 *params,
regmap_write(lt9611c->regmap, 0xe0de, 0x02);
ret = regmap_read_poll_timeout(lt9611c->regmap, 0xe0ae, temp,
- temp == 0x02, 1000, 100 * 1000);
+ temp == 0x02, 1000, 200 * 1000);
if (ret)
return -ETIMEDOUT;
--
2.34.1