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MLK-20181-6: drm/mxsfb: Add PM_SLEEP support 

Since power to the lcdif block can be lost on suspend implement
PM_SLEEP_OPS using drm_mode_config_helper_suspend/resume to save/restore
the current mode.

Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Reviewed-by: Stefan Agner <stefan@agner.ch>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Stefan Agner <stefan@agner.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/cfa1a4083eefd112362e640deeb2e120584ac3f5.1537191359.git.leonard.crestez@nxp.com
pull/10/head
Leonard Crestez 2018-09-17 16:42:14 +03:00 committed by Robert Chiras
parent fba83191e7
commit 5f5c92ee0a
1 changed files with 4 additions and 48 deletions
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52
drivers/gpu/drm/mxsfb/mxsfb_drv.c
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@ -548,67 +548,23 @@ static int mxsfb_remove(struct platform_device *pdev)
return 0;
}
#ifdef CONFIG_PM
static int mxsfb_runtime_suspend(struct device *dev)
{
struct drm_device *drm = dev_get_drvdata(dev);
struct mxsfb_drm_private *mxsfb = drm->dev_private;
if (!drm->registered)
return 0;
if (mxsfb->enabled) {
mxsfb_crtc_disable(mxsfb);
mxsfb->suspended = true;
}
return 0;
}
static int mxsfb_runtime_resume(struct device *dev)
{
struct drm_device *drm = dev_get_drvdata(dev);
struct mxsfb_drm_private *mxsfb = drm->dev_private;
if (!drm->registered || !mxsfb->suspended)
return 0;
mxsfb_crtc_enable(mxsfb);
mxsfb->suspended = false;
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int mxsfb_suspend(struct device *dev)
{
struct drm_device *drm = dev_get_drvdata(dev);
struct mxsfb_drm_private *mxsfb = drm->dev_private;
if (mxsfb->enabled) {
mxsfb_crtc_disable(mxsfb);
mxsfb->suspended = true;
}
return 0;
return drm_mode_config_helper_suspend(drm);
}
static int mxsfb_resume(struct device *dev)
{
struct drm_device *drm = dev_get_drvdata(dev);
struct mxsfb_drm_private *mxsfb = drm->dev_private;
if (!mxsfb->suspended)
return 0;
mxsfb_crtc_enable(mxsfb);
mxsfb->suspended = false;
return 0;
return drm_mode_config_helper_resume(drm);
}
#endif
static const struct dev_pm_ops mxsfb_pm_ops = {
SET_RUNTIME_PM_OPS(mxsfb_runtime_suspend, mxsfb_runtime_resume, NULL)
SET_SYSTEM_SLEEP_PM_OPS(mxsfb_suspend, mxsfb_resume)
};
@ -619,7 +575,7 @@ static struct platform_driver mxsfb_platform_driver = {
.driver = {
.name = "mxsfb_drm",
.of_match_table = mxsfb_dt_ids,
.pm = &mxsfb_pm_ops,
.pm = &mxsfb_pm_ops,
},
};