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drm/meson: add resume/suspend hooks

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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>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Tested-by: Kevin Hilman <khilman@baylibre.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190827095825.21015-3-narmstrong@baylibre.com
This commit is contained in:
Neil Armstrong 2019-08-27 11:58:25 +02:00
parent 1374b8375c
commit cf3d4e5347
1 changed files with 32 additions and 0 deletions
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32
drivers/gpu/drm/meson/meson_drv.c
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@ -372,6 +372,33 @@ 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",
@ -467,11 +494,16 @@ 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,
},
};