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drm/rockchip: dw-dp: reset dp controller status

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After disable dp controller, reset it status to avoid something
wrong if the status is abnormal.

Signed-off-by: Zhang Yubing <yubing.zhang@rock-chips.com>
Change-Id: I9de6ab056317a09b104ef604a6ef4ec20610fb65
This commit is contained in:
Zhang Yubing
2022-03-22 16:45:23 +08:00
parent a36ea1eeec
commit f14693316b
1 changed files with 12 additions and 0 deletions
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12
drivers/gpu/drm/rockchip/dw-dp.c
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@@ -2112,6 +2112,17 @@ static void dw_dp_bridge_atomic_enable(struct drm_bridge *bridge,
} }
} }
static void dw_dp_reset(struct dw_dp *dp)
{
regmap_update_bits(dp->regmap, DPTX_SOFT_RESET_CTRL, CONTROLLER_RESET,
FIELD_PREP(CONTROLLER_RESET, 1));
udelay(10);
regmap_update_bits(dp->regmap, DPTX_SOFT_RESET_CTRL, CONTROLLER_RESET,
FIELD_PREP(CONTROLLER_RESET, 0));
dw_dp_init(dp);
}
static void dw_dp_bridge_atomic_disable(struct drm_bridge *bridge, static void dw_dp_bridge_atomic_disable(struct drm_bridge *bridge,
struct drm_bridge_state *old_bridge_state) struct drm_bridge_state *old_bridge_state)
{ {
@@ -2120,6 +2131,7 @@ static void dw_dp_bridge_atomic_disable(struct drm_bridge *bridge,
dw_dp_video_disable(dp); dw_dp_video_disable(dp);
dw_dp_link_disable(dp); dw_dp_link_disable(dp);
bitmap_zero(dp->sdp_reg_bank, SDP_REG_BANK_SIZE); bitmap_zero(dp->sdp_reg_bank, SDP_REG_BANK_SIZE);
dw_dp_reset(dp);
} }
static enum drm_connector_status dw_dp_detect_dpcd(struct dw_dp *dp) static enum drm_connector_status dw_dp_detect_dpcd(struct dw_dp *dp)