Re: [PATCH v3 2/7] drm/msm/dp: replace is_connected with link_ready
From: Kuogee Hsieh
Date: Mon Sep 18 2023 - 13:09:21 EST
On 9/15/2023 6:51 PM, Dmitry Baryshkov wrote:
On Sat, 16 Sept 2023 at 00:38, Kuogee Hsieh <quic_khsieh@xxxxxxxxxxx> wrote:
The is_connected flag is set to true after DP mainlink successfully
finish link training. Replace the is_connected flag with link_ready
finishes.
Also this is not a replace, this patch renames the flag.
yes, it is rename.
flag to avoid confusing.
confusing what with what?
we have ST_MAINLINK_RAEDY state which means mainlink had finished link
training and ready for video.
Therefore I think link_ready is more meaningful than is_connected.
Signed-off-by: Kuogee Hsieh <quic_khsieh@xxxxxxxxxxx>
---
drivers/gpu/drm/msm/dp/dp_display.c | 19 +++++++++----------
drivers/gpu/drm/msm/dp/dp_display.h | 2 +-
drivers/gpu/drm/msm/dp/dp_drm.c | 14 +++++++-------
3 files changed, 17 insertions(+), 18 deletions(-)
diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index c217430..18d16c7 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -367,12 +367,11 @@ static void dp_display_send_hpd_event(struct msm_dp *dp_display)
drm_helper_hpd_irq_event(connector->dev);
}
-
static int dp_display_send_hpd_notification(struct dp_display_private *dp,
bool hpd)
{
- if ((hpd && dp->dp_display.is_connected) ||
- (!hpd && !dp->dp_display.is_connected)) {
+ if ((hpd && dp->dp_display.link_ready) ||
+ (!hpd && !dp->dp_display.link_ready)) {
drm_dbg_dp(dp->drm_dev, "HPD already %s\n",
(hpd ? "on" : "off"));
return 0;
@@ -382,7 +381,7 @@ static int dp_display_send_hpd_notification(struct dp_display_private *dp,
if (!hpd)
dp->panel->video_test = false;
- dp->dp_display.is_connected = hpd;
+ dp->dp_display.link_ready = hpd;
drm_dbg_dp(dp->drm_dev, "type=%d hpd=%d\n",
dp->dp_display.connector_type, hpd);
@@ -922,7 +921,7 @@ int dp_display_set_plugged_cb(struct msm_dp *dp_display,
dp_display->plugged_cb = fn;
dp_display->codec_dev = codec_dev;
- plugged = dp_display->is_connected;
+ plugged = dp_display->link_ready;
dp_display_handle_plugged_change(dp_display, plugged);
return 0;
@@ -1352,16 +1351,16 @@ static int dp_pm_resume(struct device *dev)
* also only signal audio when disconnected
*/
if (dp->link->sink_count) {
- dp->dp_display.is_connected = true;
+ dp->dp_display.link_ready = true;
} else {
- dp->dp_display.is_connected = false;
+ dp->dp_display.link_ready = false;
dp_display_handle_plugged_change(dp_display, false);
}
drm_dbg_dp(dp->drm_dev,
"After, type=%d sink=%d conn=%d core_init=%d phy_init=%d power=%d\n",
dp->dp_display.connector_type, dp->link->sink_count,
- dp->dp_display.is_connected, dp->core_initialized,
+ dp->dp_display.link_ready, dp->core_initialized,
dp->phy_initialized, dp_display->power_on);
mutex_unlock(&dp->event_mutex);
@@ -1754,8 +1753,8 @@ void dp_bridge_hpd_notify(struct drm_bridge *bridge,
return;
}
- if (!dp_display->is_connected && status == connector_status_connected)
+ if (!dp_display->link_ready && status == connector_status_connected)
dp_add_event(dp, EV_HPD_PLUG_INT, 0, 0);
- else if (dp_display->is_connected && status == connector_status_disconnected)
+ else if (dp_display->link_ready && status == connector_status_disconnected)
dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0);
}
diff --git a/drivers/gpu/drm/msm/dp/dp_display.h b/drivers/gpu/drm/msm/dp/dp_display.h
index b3c08de..d65693e 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.h
+++ b/drivers/gpu/drm/msm/dp/dp_display.h
@@ -16,7 +16,7 @@ struct msm_dp {
struct drm_bridge *bridge;
struct drm_connector *connector;
struct drm_bridge *next_bridge;
- bool is_connected;
+ bool link_ready;
bool audio_enabled;
bool power_on;
unsigned int connector_type;
diff --git a/drivers/gpu/drm/msm/dp/dp_drm.c b/drivers/gpu/drm/msm/dp/dp_drm.c
index 785d766..ee945ca 100644
--- a/drivers/gpu/drm/msm/dp/dp_drm.c
+++ b/drivers/gpu/drm/msm/dp/dp_drm.c
@@ -24,10 +24,10 @@ static enum drm_connector_status dp_bridge_detect(struct drm_bridge *bridge)
dp = to_dp_bridge(bridge)->dp_display;
- drm_dbg_dp(dp->drm_dev, "is_connected = %s\n",
- (dp->is_connected) ? "true" : "false");
+ drm_dbg_dp(dp->drm_dev, "link_ready = %s\n",
+ (dp->link_ready) ? "true" : "false");
- return (dp->is_connected) ? connector_status_connected :
+ return (dp->link_ready) ? connector_status_connected :
connector_status_disconnected;
}
@@ -40,8 +40,8 @@ static int dp_bridge_atomic_check(struct drm_bridge *bridge,
dp = to_dp_bridge(bridge)->dp_display;
- drm_dbg_dp(dp->drm_dev, "is_connected = %s\n",
- (dp->is_connected) ? "true" : "false");
+ drm_dbg_dp(dp->drm_dev, "link_ready = %s\n",
+ (dp->link_ready) ? "true" : "false");
/*
* There is no protection in the DRM framework to check if the display
@@ -55,7 +55,7 @@ static int dp_bridge_atomic_check(struct drm_bridge *bridge,
* After that this piece of code can be removed.
*/
if (bridge->ops & DRM_BRIDGE_OP_HPD)
- return (dp->is_connected) ? 0 : -ENOTCONN;
+ return (dp->link_ready) ? 0 : -ENOTCONN;
return 0;
}
@@ -78,7 +78,7 @@ static int dp_bridge_get_modes(struct drm_bridge *bridge, struct drm_connector *
dp = to_dp_bridge(bridge)->dp_display;
/* pluggable case assumes EDID is read when HPD */
- if (dp->is_connected) {
+ if (dp->link_ready) {
rc = dp_display_get_modes(dp);
if (rc <= 0) {
DRM_ERROR("failed to get DP sink modes, rc=%d\n", rc);
--
2.7.4