From dc659a4e852b591771fc2e5abb60f4455b0cf316 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= <noralf@tronnes.org>
Date: Sat, 13 Mar 2021 12:25:44 +0100
Subject: [PATCH] drm/probe-helper: Check epoch counter in output_poll_execute()
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Git-commit: dc659a4e852b591771fc2e5abb60f4455b0cf316
Patch-mainline: v5.13-rc1
References: git-fixes
drm_helper_hpd_irq_event() checks the epoch counter to determine
connector status change. This was introduced in
commit 5186421cbfe2 ("drm: Introduce epoch counter to drm_connector").
Do the same for output_poll_execute() so it can detect other changes
beside connection status value changes.
V2:
- Add Fixes tag (Daniel)
Fixes: 5186421cbfe2 ("drm: Introduce epoch counter to drm_connector")
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210313112545.37527-3-noralf@tronnes.org
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/gpu/drm/drm_probe_helper.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/drm_probe_helper.c b/drivers/gpu/drm/drm_probe_helper.c
index ad59a51eab6d..e7e1ee2aa352 100644
--- a/drivers/gpu/drm/drm_probe_helper.c
+++ b/drivers/gpu/drm/drm_probe_helper.c
@@ -624,6 +624,7 @@ static void output_poll_execute(struct work_struct *work)
struct drm_connector_list_iter conn_iter;
enum drm_connector_status old_status;
bool repoll = false, changed;
+ u64 old_epoch_counter;
if (!dev->mode_config.poll_enabled)
return;
@@ -660,8 +661,9 @@ static void output_poll_execute(struct work_struct *work)
repoll = true;
+ old_epoch_counter = connector->epoch_counter;
connector->status = drm_helper_probe_detect(connector, NULL, false);
- if (old_status != connector->status) {
+ if (old_epoch_counter != connector->epoch_counter) {
const char *old, *new;
/*
@@ -690,6 +692,9 @@ static void output_poll_execute(struct work_struct *work)
connector->base.id,
connector->name,
old, new);
+ DRM_DEBUG_KMS("[CONNECTOR:%d:%s] epoch counter %llu -> %llu\n",
+ connector->base.id, connector->name,
+ old_epoch_counter, connector->epoch_counter);
changed = true;
}
--
2.26.2