Commit cf3d4e53 authored by Neil Armstrong's avatar Neil Armstrong
Browse files

drm/meson: add resume/suspend hooks 



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: default avatarNeil Armstrong <narmstrong@baylibre.com>
Acked-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
Tested-by: default avatarKevin Hilman <khilman@baylibre.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190827095825.21015-3-narmstrong@baylibre.com
parent 1374b837

drivers/gpu/drm/meson/meson_drv.c

+32 −0
Original line number Diff line number Diff line
@@ -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,

	},

};

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