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drm/bridge: analogix_dp: Set link power state

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Signed-off-by: Wyon bi <bivvy.bi@rock-chips.com>
Change-Id: I4f651cb18231c87a1d5848d16308876e49d13b4f
This commit is contained in:
Wyon bi
2022-01-12 10:41:34 +08:00
committed by Tao Huang
parent 71ddde314e
commit 5d2c0e06ed
1 changed files with 55 additions and 0 deletions
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55
drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
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@@ -984,6 +984,52 @@ static int analogix_dp_fast_link_train_detection(struct analogix_dp_device *dp)
return 0;
}
static int analogix_dp_link_power_up(struct analogix_dp_device *dp)
{
u8 value;
int ret;
if (dp->dpcd[DP_DPCD_REV] < 0x11)
return 0;
ret = drm_dp_dpcd_readb(&dp->aux, DP_SET_POWER, &value);
if (ret < 0)
return ret;
value &= ~DP_SET_POWER_MASK;
value |= DP_SET_POWER_D0;
ret = drm_dp_dpcd_writeb(&dp->aux, DP_SET_POWER, value);
if (ret < 0)
return ret;
usleep_range(1000, 2000);
return 0;
}
static int analogix_dp_link_power_down(struct analogix_dp_device *dp)
{
u8 value;
int ret;
if (dp->dpcd[DP_DPCD_REV] < 0x11)
return 0;
ret = drm_dp_dpcd_readb(&dp->aux, DP_SET_POWER, &value);
if (ret < 0)
return ret;
value &= ~DP_SET_POWER_MASK;
value |= DP_SET_POWER_D3;
ret = drm_dp_dpcd_writeb(&dp->aux, DP_SET_POWER, value);
if (ret < 0)
return ret;
return 0;
}
static int analogix_dp_commit(struct analogix_dp_device *dp)
{
struct video_info *video = &dp->video_info;
@@ -995,6 +1041,12 @@ static int analogix_dp_commit(struct analogix_dp_device *dp)
return ret;
}
ret = analogix_dp_link_power_up(dp);
if (ret) {
dev_err(dp->dev, "failed to power up link: %d\n", ret);
return ret;
}
if (device_property_read_bool(dp->dev, "panel-self-test"))
return drm_dp_dpcd_writeb(&dp->aux, DP_EDP_CONFIGURATION_SET,
DP_PANEL_SELF_TEST_ENABLE);
@@ -1445,6 +1497,9 @@ static void analogix_dp_bridge_disable(struct drm_bridge *bridge)
}
}
if (!analogix_dp_get_plug_in_status(dp))
analogix_dp_link_power_down(dp);
disable_irq(dp->irq);
if (dp->plat_data->power_off)