Re: [PATCH v5 14/36] drm/bridge: analogix_dp: Extend hpd check time to 100ms

From: Archit Taneja
Date: Wed Mar 14 2018 - 02:15:30 EST




On Saturday 10 March 2018 03:53 AM, Enric Balletbo i Serra wrote:
From: Lin Huang <hl@xxxxxxxxxxxxxx>

There was a 1ms delay to detect the hpd signal, which is too short to
detect a short pulse. This patch extends this delay to 100ms.


Reviewed-by: Archit Taneja <architt@xxxxxxxxxxxxxx>

Thanks,
Archit

Cc: StÃphane Marchesin <marcheu@xxxxxxxxxxxx>
Cc: åå ç <wzz@xxxxxxxxxxxxxx>
Signed-off-by: Lin Huang <hl@xxxxxxxxxxxxxx>
Signed-off-by: Sean Paul <seanpaul@xxxxxxxxxxxx>
Signed-off-by: Thierry Escande <thierry.escande@xxxxxxxxxxxxx>
Reviewed-by: Andrzej Hajda <a.hajda@xxxxxxxxxxx>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@xxxxxxxxxxxxx>
Tested-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
---

drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
index 3a222e7e46ee..6cbde8473f58 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
@@ -76,7 +76,7 @@ static int analogix_dp_detect_hpd(struct analogix_dp_device *dp)
return 0;
timeout_loop++;
- usleep_range(10, 11);
+ usleep_range(1000, 1100);
}
/*