linux-kernel - [PATCH RFT v2 1/3] drm/panfrost: enable devfreq based the "operating-points-v2" property

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20200112001623.2121227-2-martin.blumenstingl@googlemail.com>
Date:   Sun, 12 Jan 2020 01:16:21 +0100
From:   Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To:     dri-devel@...ts.freedesktop.org, alyssa@...enzweig.io,
        steven.price@....com, tomeu.vizoso@...labora.com, robh@...nel.org
Cc:     linux-kernel@...r.kernel.org, daniel@...ll.ch, airlied@...ux.ie,
        robin.murphy@....com, linux-amlogic@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, sudeep.holla@....com,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Subject: [PATCH RFT v2 1/3] drm/panfrost: enable devfreq based the "operating-points-v2" property

Decouple the check to see whether we want to enable devfreq for the GPU
from dev_pm_opp_set_regulators(). This is preparation work for adding
back support for regulator control (which means we need to call
dev_pm_opp_set_regulators() before dev_pm_opp_of_add_table(), which
means having a check for "is devfreq enabled" that is not tied to
dev_pm_opp_of_add_table() makes things easier).

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
---
 drivers/gpu/drm/panfrost/panfrost_devfreq.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.c b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
index 413987038fbf..1471588763ce 100644
--- a/drivers/gpu/drm/panfrost/panfrost_devfreq.c
+++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
@@ -5,6 +5,7 @@
 #include <linux/platform_device.h>
 #include <linux/pm_opp.h>
 #include <linux/clk.h>
+#include <linux/property.h>
 #include <linux/regulator/consumer.h>
 
 #include "panfrost_device.h"
@@ -79,10 +80,12 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev)
 	struct devfreq *devfreq;
 	struct thermal_cooling_device *cooling;
 
-	ret = dev_pm_opp_of_add_table(dev);
-	if (ret == -ENODEV) /* Optional, continue without devfreq */
+	if (!device_property_present(dev, "operating-points-v2"))
+		/* Optional, continue without devfreq */
 		return 0;
-	else if (ret)
+
+	ret = dev_pm_opp_of_add_table(dev);
+	if (ret)
 		return ret;
 
 	panfrost_devfreq_reset(pfdev);
-- 
2.24.1