diff options
| -rw-r--r-- | drivers/gpu/drm/bridge/ite-it6505.c | 29 |
1 files changed, 18 insertions, 11 deletions
diff --git a/drivers/gpu/drm/bridge/ite-it6505.c b/drivers/gpu/drm/bridge/ite-it6505.c index 8fed30df08b0..4b673c4792d7 100644 --- a/drivers/gpu/drm/bridge/ite-it6505.c +++ b/drivers/gpu/drm/bridge/ite-it6505.c @@ -737,8 +737,9 @@ static int it6505_drm_dp_link_probe(struct drm_dp_aux *aux, return 0; } -static int it6505_drm_dp_link_power_up(struct drm_dp_aux *aux, - struct it6505_drm_dp_link *link) +static int it6505_drm_dp_link_set_power(struct drm_dp_aux *aux, + struct it6505_drm_dp_link *link, + u8 mode) { u8 value; int err; @@ -752,18 +753,20 @@ static int it6505_drm_dp_link_power_up(struct drm_dp_aux *aux, return err; value &= ~DP_SET_POWER_MASK; - value |= DP_SET_POWER_D0; + value |= mode; err = drm_dp_dpcd_writeb(aux, DP_SET_POWER, value); if (err < 0) return err; - /* - * According to the DP 1.1 specification, a "Sink Device must exit the - * power saving state within 1 ms" (Section 2.5.3.1, Table 5-52, "Sink - * Control Field" (register 0x600). - */ - usleep_range(1000, 2000); + if (mode == DP_SET_POWER_D0) { + /* + * According to the DP 1.1 specification, a "Sink Device must + * exit the power saving state within 1 ms" (Section 2.5.3.1, + * Table 5-52, "Sink Control Field" (register 0x600). + */ + usleep_range(1000, 2000); + } return 0; } @@ -2624,7 +2627,8 @@ static enum drm_connector_status it6505_detect(struct it6505 *it6505) if (it6505_get_sink_hpd_status(it6505)) { it6505_aux_on(it6505); it6505_drm_dp_link_probe(&it6505->aux, &it6505->link); - it6505_drm_dp_link_power_up(&it6505->aux, &it6505->link); + it6505_drm_dp_link_set_power(&it6505->aux, &it6505->link, + DP_SET_POWER_D0); it6505->auto_train_retry = AUTO_TRAIN_RETRY; if (it6505->dpcd[0] == 0) { @@ -2960,8 +2964,11 @@ static void it6505_bridge_atomic_disable(struct drm_bridge *bridge, DRM_DEV_DEBUG_DRIVER(dev, "start"); - if (it6505->powered) + if (it6505->powered) { it6505_video_disable(it6505); + it6505_drm_dp_link_set_power(&it6505->aux, &it6505->link, + DP_SET_POWER_D3); + } } static enum drm_connector_status |