Unverified Commit 0b82a2b7 authored by Stefan Eichenberger's avatar Stefan Eichenberger Committed by Robert Foss
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drm/bridge: lt8912b: Add suspend/resume support 



Add support for suspend and resume. The lt8912b will power off when
going into suspend and power on when resuming.

Signed-off-by: default avatarStefan Eichenberger <stefan.eichenberger@toradex.com>
Signed-off-by: default avatarFrancesco Dolcini <francesco.dolcini@toradex.com>
Reviewed-by: default avatarRobert Foss <rfoss@kernel.org>
Signed-off-by: default avatarRobert Foss <rfoss@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20231115121338.22959-2-francesco@dolcini.it
parent e4256751

drivers/gpu/drm/bridge/lontium-lt8912b.c

+28 −0
Original line number Diff line number Diff line
@@ -634,6 +634,33 @@ static const struct drm_bridge_funcs lt8912_bridge_funcs = { 
	.get_edid = lt8912_bridge_get_edid,

};



static int lt8912_bridge_resume(struct device *dev)

{

	struct lt8912 *lt = dev_get_drvdata(dev);

	int ret;



	ret = lt8912_hard_power_on(lt);

	if (ret)

		return ret;



	ret = lt8912_soft_power_on(lt);

	if (ret)

		return ret;



	return lt8912_video_on(lt);

}



static int lt8912_bridge_suspend(struct device *dev)

{

	struct lt8912 *lt = dev_get_drvdata(dev);



	lt8912_hard_power_off(lt);



	return 0;

}



static DEFINE_SIMPLE_DEV_PM_OPS(lt8912_bridge_pm_ops, lt8912_bridge_suspend, lt8912_bridge_resume);



static int lt8912_parse_dt(struct lt8912 *lt)

{

	struct gpio_desc *gp_reset;
@@ -770,6 +797,7 @@ static struct i2c_driver lt8912_i2c_driver = { 
	.driver = {

		.name = "lt8912",

		.of_match_table = lt8912_dt_match,

		.pm = pm_sleep_ptr(&lt8912_bridge_pm_ops),

	},

	.probe = lt8912_probe,

	.remove = lt8912_remove,