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drm/bridge: lt8912b: Add suspend/resume support

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

Signed-off-by: Stefan Eichenberger <stefan.eichenberger@toradex.com>
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Reviewed-by: Robert Foss <rfoss@kernel.org>
Signed-off-by: Robert Foss <rfoss@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20231115121338.22959-2-francesco@dolcini.it
This commit is contained in:
Stefan Eichenberger 2023-11-15 13:13:36 +01:00 committed by Robert Foss
parent e4256751df
commit 0b82a2b70f
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GPG Key ID: 3EFD900F76D1D784
1 changed files with 28 additions and 0 deletions
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28
drivers/gpu/drm/bridge/lontium-lt8912b.c
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@ -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,