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@xxxxxxxxxxxx>
---
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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