mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-23 23:42:43 +00:00
538a1d740c
The patches were generated from the RPi repo with the following command: git format-patch v6.6.58..rpi-6.6.y Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
35 lines
1.1 KiB
Diff
35 lines
1.1 KiB
Diff
From d984fd8907736d37656c558e213cfe087e43a7ce Mon Sep 17 00:00:00 2001
|
|
From: Dom Cobley <popcornmix@gmail.com>
|
|
Date: Mon, 12 Aug 2024 13:31:58 +0100
|
|
Subject: [PATCH 1225/1350] drm/vc4: Add a delay after disabling hdmi phy
|
|
output
|
|
|
|
There appears to be a requirement for some devices
|
|
(I'm testing with a 8K VRROOM 40Gbps HDMI switch)
|
|
for a measable delay between removing the hdmi phy output from
|
|
the old mode, to enabling the hdmi phy output for the new mode.
|
|
|
|
Without the delay, a mode switch has a small change of getting a permanent
|
|
'no signal', which requires a subsequent mode switch or a unplug/replug
|
|
to redetect.
|
|
|
|
Switching between 4kp24/25/30 modes fails about 5% of time in my testing.
|
|
|
|
Add a delay to make it impossible to switch faster than this.
|
|
|
|
Signed-off-by: Dom Cobley <popcornmix@gmail.com>
|
|
---
|
|
drivers/gpu/drm/vc4/vc4_crtc.c | 1 +
|
|
1 file changed, 1 insertion(+)
|
|
|
|
--- a/drivers/gpu/drm/vc4/vc4_crtc.c
|
|
+++ b/drivers/gpu/drm/vc4/vc4_crtc.c
|
|
@@ -668,6 +668,7 @@ static void vc4_crtc_atomic_disable(stru
|
|
* someone was waiting it.
|
|
*/
|
|
vc4_crtc_send_vblank(crtc);
|
|
+ msleep(20);
|
|
}
|
|
|
|
static void vc4_crtc_atomic_enable(struct drm_crtc *crtc,
|