lkml.org 
[lkml]   [2021]   [Oct]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v3 6/6] drm/msm/dp: Remove the hpd init delay for eDP
Date
DP driver needs a 10 second delay before phy_init so that
the usb combo phy initializes and sets up the necessary
clocks for usb devices such as keyboard and mouse.

eDP controller uses a standalone phy and need not wait for
phy initialization from any other component. This change
will remove the delay for eDP controller.

Signed-off-by: Sankeerth Billakanti <quic_sbillaka@quicinc.com>
---
drivers/gpu/drm/msm/dp/dp_display.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index 61385d6..de6a1fd 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -1430,6 +1430,7 @@ void __exit msm_dp_unregister(void)
void msm_dp_irq_postinstall(struct msm_dp *dp_display)
{
struct dp_display_private *dp;
+ u8 delay;

if (!dp_display)
return;
@@ -1438,7 +1439,15 @@ void msm_dp_irq_postinstall(struct msm_dp *dp_display)

dp_hpd_event_setup(dp);

- dp_add_event(dp, EV_HPD_INIT_SETUP, 0, 100);
+ if (dp->dp_display.connector_type == DRM_MODE_CONNECTOR_eDP) {
+ /* eDP does not need any delay before phy init */
+ delay = 0;
+ } else {
+ /* DP needs 10 second delay to let usb combo phy initialize */
+ delay = 100;
+ }
+
+ dp_add_event(dp, EV_HPD_INIT_SETUP, 0, delay);
}

void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor)
--
2.7.4
\
 
 \ /
  Last update: 2021-10-28 03:57    [W:0.070 / U:0.188 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site