From: Kuogee Hsieh <khsieh@codeaurora.org>
To: robdclark@gmail.com, sean@poorly.run, swboyd@chromium.org
Cc: tanmay@codeaurora.org, abhinavk@codeaurora.org,
aravindh@codeaurora.org, khsieh@codeaurora.org,
rnayak@codeaurora.org, airlied@linux.ie, daniel@ffwll.ch,
linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org,
freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org
Subject: [PATCH] drm/msm/dp: promote irq_hpd handle to handle link trainign correctly
Date: Fri, 30 Oct 2020 16:23:24 -0700 [thread overview]
Message-ID: <20201030232324.11170-1-khsieh@codeaurora.org> (raw)
Some dongles, such as Apple, required link training done at irq_hpd
request instead of plugin request. This patch promote irq_hpd hanlder
to handle link training and setup hpd_state correctly.
Signed-off-by: Kuogee Hsieh <khsieh@codeaurora.org>
---
drivers/gpu/drm/msm/dp/dp_display.c | 20 ++++++++++++++++++--
1 file changed, 18 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index 13b66266cd69..55627530957c 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -469,7 +469,9 @@ static int dp_display_handle_irq_hpd(struct dp_display_private *dp)
static int dp_display_usbpd_attention_cb(struct device *dev)
{
int rc = 0;
+ u32 sink_request;
struct dp_display_private *dp;
+ struct dp_usbpd *hpd;
if (!dev) {
DRM_ERROR("invalid dev\n");
@@ -483,10 +485,24 @@ static int dp_display_usbpd_attention_cb(struct device *dev)
return -ENODEV;
}
+ hpd = dp->usbpd;
+
/* check for any test request issued by sink */
rc = dp_link_process_request(dp->link);
- if (!rc)
- dp_display_handle_irq_hpd(dp);
+ if (!rc) {
+ sink_request = dp->link->sink_request;
+ if (sink_request & DS_PORT_STATUS_CHANGED) {
+ dp->hpd_state = ST_CONNECT_PENDING;
+ hpd->hpd_high = 1;
+ }
+
+ rc = dp_display_handle_irq_hpd(dp);
+
+ if (rc && sink_request & DS_PORT_STATUS_CHANGED) {
+ hpd->hpd_high = 0;
+ dp->hpd_state = ST_DISCONNECTED;
+ }
+ }
return rc;
}
base-commit: 0e162b10644605428cd2596c12f8ed410cf9d2d9
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
next reply other threads:[~2020-10-30 23:23 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-30 23:23 Kuogee Hsieh [this message]
2020-11-02 19:29 ` [PATCH] drm/msm/dp: promote irq_hpd handle to handle link trainign correctly Stephen Boyd
2020-11-02 23:16 ` Rob Clark
2020-11-03 17:02 ` khsieh
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