From: Vitor Soares <ivitro@gmail.com>
To: Andrzej Hajda <andrzej.hajda@intel.com>,
Neil Armstrong <neil.armstrong@linaro.org>,
Robert Foss <rfoss@kernel.org>,
Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
Jonas Karlman <jonas@kwiboo.se>,
Jernej Skrabec <jernej.skrabec@gmail.com>,
Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Maxime Ripard <mripard@kernel.org>,
Thomas Zimmermann <tzimmermann@suse.de>,
David Airlie <airlied@gmail.com>, Simona Vetter <simona@ffwll.ch>
Cc: Vitor Soares <vitor.soares@toradex.com>,
dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
stable@vger.kernel.org,
Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Subject: [PATCH v4] drm/bridge: cdns-dsi: Replace deprecated UNIVERSAL_DEV_PM_OPS()
Date: Tue, 7 Apr 2026 15:41:41 +0100 [thread overview]
Message-ID: <20260407144142.1420354-2-ivitro@gmail.com> (raw)
From: Vitor Soares <vitor.soares@toradex.com>
The deprecated UNIVERSAL_DEV_PM_OPS() macro uses the provided callbacks
for both runtime PM and system sleep. This causes the DSI clocks to be
disabled twice: once during runtime suspend and again during system
suspend, resulting in a WARN message from the clock framework when
attempting to disable already-disabled clocks.
[ 84.384540] clk:231:5 already disabled
[ 84.388314] WARNING: CPU: 2 PID: 531 at /drivers/clk/clk.c:1181 clk_core_disable+0xa4/0xac
...
[ 84.579183] Call trace:
[ 84.581624] clk_core_disable+0xa4/0xac
[ 84.585457] clk_disable+0x30/0x4c
[ 84.588857] cdns_dsi_suspend+0x20/0x58 [cdns_dsi]
[ 84.593651] pm_generic_suspend+0x2c/0x44
[ 84.597661] ti_sci_pd_suspend+0xbc/0x15c
[ 84.601670] dpm_run_callback+0x8c/0x14c
[ 84.605588] __device_suspend+0x1a0/0x56c
[ 84.609594] dpm_suspend+0x17c/0x21c
[ 84.613165] dpm_suspend_start+0xa0/0xa8
[ 84.617083] suspend_devices_and_enter+0x12c/0x634
[ 84.621872] pm_suspend+0x1fc/0x368
To address this issue, replace UNIVERSAL_DEV_PM_OPS() with
SET_RUNTIME_PM_OPS(), enabling suspend/resume handling through the
_enable()/_disable() hooks managed by the DRM framework for both
runtime and system-wide PM.
Cc: stable@vger.kernel.org # 6.1.x
Fixes: e19233955d9e ("drm/bridge: Add Cadence DSI driver")
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Signed-off-by: Vitor Soares <vitor.soares@toradex.com>
---
v3 -> v4
- Add Reviewed-by from Tomi Valkeinen
- Rebase on top of drm-misc-fixes
- Verified issue still present on current mainline
v2 -> v3
- Fix warning: 'cdns_dsi_suspend' defined but not used [-Wunused-function]
- Fix warning: 'cdns_dsi_resume' defined but not used [-Wunused-function]
v1 -> v2
- Rely only on SET_RUNTIME_PM_OPS() for the PM.
drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c b/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c
index 0dd85e26248c..e07a9892df4e 100644
--- a/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c
+++ b/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c
@@ -1230,7 +1230,7 @@ static const struct mipi_dsi_host_ops cdns_dsi_ops = {
.transfer = cdns_dsi_transfer,
};
-static int __maybe_unused cdns_dsi_resume(struct device *dev)
+static int cdns_dsi_resume(struct device *dev)
{
struct cdns_dsi *dsi = dev_get_drvdata(dev);
@@ -1241,7 +1241,7 @@ static int __maybe_unused cdns_dsi_resume(struct device *dev)
return 0;
}
-static int __maybe_unused cdns_dsi_suspend(struct device *dev)
+static int cdns_dsi_suspend(struct device *dev)
{
struct cdns_dsi *dsi = dev_get_drvdata(dev);
@@ -1251,8 +1251,9 @@ static int __maybe_unused cdns_dsi_suspend(struct device *dev)
return 0;
}
-static UNIVERSAL_DEV_PM_OPS(cdns_dsi_pm_ops, cdns_dsi_suspend, cdns_dsi_resume,
- NULL);
+static const struct dev_pm_ops cdns_dsi_pm_ops = {
+ RUNTIME_PM_OPS(cdns_dsi_suspend, cdns_dsi_resume, NULL)
+};
static int cdns_dsi_drm_probe(struct platform_device *pdev)
{
@@ -1399,7 +1400,7 @@ static struct platform_driver cdns_dsi_platform_driver = {
.driver = {
.name = "cdns-dsi",
.of_match_table = cdns_dsi_of_match,
- .pm = &cdns_dsi_pm_ops,
+ .pm = pm_ptr(&cdns_dsi_pm_ops),
},
};
module_platform_driver(cdns_dsi_platform_driver);
--
2.53.0
reply other threads:[~2026-04-07 14:41 UTC|newest]
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