From cf3d4e534711059f77884697dc93b97d60a4ed9f Mon Sep 17 00:00:00 2001 From: Neil Armstrong Date: Tue, 27 Aug 2019 11:58:25 +0200 Subject: [PATCH] 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: Neil Armstrong Acked-by: Daniel Vetter Tested-by: Kevin Hilman Link: https://patchwork.freedesktop.org/patch/msgid/20190827095825.21015-3-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 a24f8de..397c331 100644 --- a/drivers/gpu/drm/meson/meson_drv.c +++ b/drivers/gpu/drm/meson/meson_drv.c @@ -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, }, }; -- 2.7.4