* [PATCH] drm/bridge: lt9611uxc: Increase EDID wait time from 500ms to 1000ms
@ 2025-11-21 13:42 Gopi Botlagunta
2025-11-24 16:57 ` Neil Armstrong
0 siblings, 1 reply; 2+ messages in thread
From: Gopi Botlagunta @ 2025-11-21 13:42 UTC (permalink / raw)
To: Andrzej Hajda, Neil Armstrong, Robert Foss, Laurent Pinchart,
Jonas Karlman, Jernej Skrabec, Maarten Lankhorst, Maxime Ripard,
Thomas Zimmermann, David Airlie, Simona Vetter
Cc: dri-devel, linux-kernel, venkata.valluru, jessica.zhang, Gopi Botlagunta
EDID interrupt was coming 600-650 ms after HPD interrupt, resulting
into EDID read timeout and default resolution of 1024x768 on display.
Signed-off-by: Gopi Botlagunta <venkata.botlagunta@oss.qualcomm.com>
---
drivers/gpu/drm/bridge/lontium-lt9611uxc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
index 38fb8776c0f4..6f2b72fba598 100644
--- a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
+++ b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
@@ -382,7 +382,7 @@ lt9611uxc_bridge_detect(struct drm_bridge *bridge, struct drm_connector *connect
static int lt9611uxc_wait_for_edid(struct lt9611uxc *lt9611uxc)
{
return wait_event_interruptible_timeout(lt9611uxc->wq, lt9611uxc->edid_read,
- msecs_to_jiffies(500));
+ msecs_to_jiffies(1000));
}
static int lt9611uxc_get_edid_block(void *data, u8 *buf, unsigned int block, size_t len)
---
base-commit: 3c3d81183061b9e49dd3207fbbbc36314744bf3f
change-id: 20251121-hdmibridge-e012bfeed3c3
Best regards,
--
Gopi Botlagunta <venkata.botlagunta@oss.qualcomm.com>
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: [PATCH] drm/bridge: lt9611uxc: Increase EDID wait time from 500ms to 1000ms
2025-11-21 13:42 [PATCH] drm/bridge: lt9611uxc: Increase EDID wait time from 500ms to 1000ms Gopi Botlagunta
@ 2025-11-24 16:57 ` Neil Armstrong
0 siblings, 0 replies; 2+ messages in thread
From: Neil Armstrong @ 2025-11-24 16:57 UTC (permalink / raw)
To: Gopi Botlagunta, Andrzej Hajda, Robert Foss, Laurent Pinchart,
Jonas Karlman, Jernej Skrabec, Maarten Lankhorst, Maxime Ripard,
Thomas Zimmermann, David Airlie, Simona Vetter
Cc: dri-devel, linux-kernel, venkata.valluru, jessica.zhang
On 11/21/25 14:42, Gopi Botlagunta wrote:
> EDID interrupt was coming 600-650 ms after HPD interrupt, resulting
> into EDID read timeout and default resolution of 1024x768 on display.
This is king of vague, can you be more explicit on this issue ? which firmware ?
which display ? which HW setup ?
Any fixes tag ?
Neil
>
> Signed-off-by: Gopi Botlagunta <venkata.botlagunta@oss.qualcomm.com>
> ---
> drivers/gpu/drm/bridge/lontium-lt9611uxc.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
> index 38fb8776c0f4..6f2b72fba598 100644
> --- a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
> +++ b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
> @@ -382,7 +382,7 @@ lt9611uxc_bridge_detect(struct drm_bridge *bridge, struct drm_connector *connect
> static int lt9611uxc_wait_for_edid(struct lt9611uxc *lt9611uxc)
> {
> return wait_event_interruptible_timeout(lt9611uxc->wq, lt9611uxc->edid_read,
> - msecs_to_jiffies(500));
> + msecs_to_jiffies(1000));
> }
>
> static int lt9611uxc_get_edid_block(void *data, u8 *buf, unsigned int block, size_t len)
>
> ---
> base-commit: 3c3d81183061b9e49dd3207fbbbc36314744bf3f
> change-id: 20251121-hdmibridge-e012bfeed3c3
>
> Best regards,
^ permalink raw reply [flat|nested] 2+ messages in thread
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2025-11-21 13:42 [PATCH] drm/bridge: lt9611uxc: Increase EDID wait time from 500ms to 1000ms Gopi Botlagunta
2025-11-24 16:57 ` Neil Armstrong
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