From: Neil Armstrong <narmstrong@baylibre.com>
To: dri-devel@lists.freedesktop.org
Cc: khilman@baylibre.com, Neil Armstrong <narmstrong@baylibre.com>,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-amlogic@lists.infradead.org
Subject: [PATCH 2/2] drm/meson: add resume/suspend hooks
Date: Tue, 27 Aug 2019 11:58:25 +0200 [thread overview]
Message-ID: <20190827095825.21015-3-narmstrong@baylibre.com> (raw)
In-Reply-To: <20190827095825.21015-1-narmstrong@baylibre.com>
Add the suspend and resume hooks to:
- save and disable the entire DRM driver on suspend
- re-init the entire VPU subsystem on resume, to recover CRTC and pixel
generator functionnal usage after DDR suspend, then recover DRM driver
state
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
---
drivers/gpu/drm/meson/meson_drv.c | 32 +++++++++++++++++++++++++++++++
1 file changed, 32 insertions(+)
diff --git a/drivers/gpu/drm/meson/meson_drv.c b/drivers/gpu/drm/meson/meson_drv.c
index 2310c96fff46..dc573ffd1f4c 100644
--- a/drivers/gpu/drm/meson/meson_drv.c
+++ b/drivers/gpu/drm/meson/meson_drv.c
@@ -361,6 +361,33 @@ static const struct component_master_ops meson_drv_master_ops = {
.unbind = meson_drv_unbind,
};
+static int __maybe_unused meson_drv_pm_suspend(struct device *dev)
+{
+ struct meson_drm *priv = dev_get_drvdata(dev);
+
+ if (!priv)
+ return 0;
+
+ return drm_mode_config_helper_suspend(priv->drm);
+}
+
+static int __maybe_unused meson_drv_pm_resume(struct device *dev)
+{
+ struct meson_drm *priv = dev_get_drvdata(dev);
+
+ if (!priv)
+ return 0;
+
+ meson_vpu_init(priv);
+ meson_venc_init(priv);
+ meson_vpp_init(priv);
+ meson_viu_init(priv);
+
+ drm_mode_config_helper_resume(priv->drm);
+
+ return 0;
+}
+
static int compare_of(struct device *dev, void *data)
{
DRM_DEBUG_DRIVER("Comparing of node %pOF with %pOF\n",
@@ -452,11 +479,16 @@ static const struct of_device_id dt_match[] = {
};
MODULE_DEVICE_TABLE(of, dt_match);
+static const struct dev_pm_ops meson_drv_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(meson_drv_pm_suspend, meson_drv_pm_resume)
+};
+
static struct platform_driver meson_drm_platform_driver = {
.probe = meson_drv_probe,
.driver = {
.name = "meson-drm",
.of_match_table = dt_match,
+ .pm = &meson_drv_pm_ops,
},
};
--
2.22.0
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http://lists.infradead.org/mailman/listinfo/linux-amlogic
next prev parent reply other threads:[~2019-08-27 9:59 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-27 9:58 [PATCH 0/2] drm/meson: add resume/suspend hooks Neil Armstrong
2019-08-27 9:58 ` [PATCH 1/2] drm/meson: dw_hdmi: " Neil Armstrong
2019-08-27 9:58 ` Neil Armstrong [this message]
2019-08-27 16:44 ` [PATCH 0/2] drm/meson: " Daniel Vetter
2019-08-27 19:17 ` Kevin Hilman
2019-08-28 8:05 ` Neil Armstrong
2019-08-28 15:12 ` Kevin Hilman
2019-08-28 15:14 ` Neil Armstrong
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