linux-kernel - [PATCH 2/5] drm/panel-samsung-atna33xc20: Use ktime_get

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Message-Id: <20221117133655.2.Iebd9f79aba0a62015fd2383fe6986c2d6fe12cfd@changeid>
Date:   Thu, 17 Nov 2022 13:38:45 -0700
From:   Drew Davenport <ddavenport@...omium.org>
To:     dri-devel@...ts.freedesktop.org
Cc:     dianders@...omium.org, Drew Davenport <ddavenport@...omium.org>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...il.com>,
        Sam Ravnborg <sam@...nborg.org>,
        Thierry Reding <thierry.reding@...il.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 2/5] drm/panel-samsung-atna33xc20: Use ktime_get_boottime for delays

ktime_get_boottime continues while the device is suspended. This change
ensures that the resume path will not be delayed if the power off delay
has already been met while the device is suspended

Signed-off-by: Drew Davenport <ddavenport@...omium.org>
---

 drivers/gpu/drm/panel/panel-samsung-atna33xc20.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-samsung-atna33xc20.c b/drivers/gpu/drm/panel/panel-samsung-atna33xc20.c
index 5a8b978c64158..f4616f0367846 100644
--- a/drivers/gpu/drm/panel/panel-samsung-atna33xc20.c
+++ b/drivers/gpu/drm/panel/panel-samsung-atna33xc20.c
@@ -53,7 +53,7 @@ static void atana33xc20_wait(ktime_t start_ktime, unsigned int min_ms)
 	ktime_t now_ktime, min_ktime;
 
 	min_ktime = ktime_add(start_ktime, ms_to_ktime(min_ms));
-	now_ktime = ktime_get();
+	now_ktime = ktime_get_boottime();
 
 	if (ktime_before(now_ktime, min_ktime))
 		msleep(ktime_to_ms(ktime_sub(min_ktime, now_ktime)) + 1);
@@ -75,7 +75,7 @@ static int atana33xc20_suspend(struct device *dev)
 	ret = regulator_disable(p->supply);
 	if (ret)
 		return ret;
-	p->powered_off_time = ktime_get();
+	p->powered_off_time = ktime_get_boottime();
 	p->el3_was_on = false;
 
 	return 0;
@@ -93,7 +93,7 @@ static int atana33xc20_resume(struct device *dev)
 	ret = regulator_enable(p->supply);
 	if (ret)
 		return ret;
-	p->powered_on_time = ktime_get();
+	p->powered_on_time = ktime_get_boottime();
 
 	if (p->no_hpd) {
 		msleep(HPD_MAX_MS);
@@ -142,7 +142,7 @@ static int atana33xc20_disable(struct drm_panel *panel)
 		return 0;
 
 	gpiod_set_value_cansleep(p->el_on3_gpio, 0);
-	p->el_on3_off_time = ktime_get();
+	p->el_on3_off_time = ktime_get_boottime();
 	p->enabled = false;
 
 	/*
-- 
2.38.1.584.g0f3c55d4c2-goog