[PATCH v2 4/5] drm/bridge: anx78xx: Switch to common helpers to power up/down dp link

[Andy Yan]

From: Andy Yan <andy.yan at rock-chips.com>

Use the common dp link power up/down helpers to avoid duplicating code.

Signed-off-by: Andy Yan <andy.yan at rock-chips.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov at oss.qualcomm.com>
---

(no changes since v1)

 .../drm/bridge/analogix/analogix-anx78xx.c    | 30 +------------------
 1 file changed, 1 insertion(+), 29 deletions(-)

diff --git a/drivers/gpu/drm/bridge/analogix/analogix-anx78xx.c b/drivers/gpu/drm/bridge/analogix/analogix-anx78xx.c
index f74694bb9c50..3d9daa885eef 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix-anx78xx.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix-anx78xx.c
@@ -656,35 +656,7 @@ static int anx78xx_dp_link_training(struct anx78xx *anx78xx)
 	if (err)
 		return err;
 
-	/*
-	 * Power up the sink (DP_SET_POWER register is only available on DPCD
-	 * v1.1 and later).
-	 */
-	if (anx78xx->dpcd[DP_DPCD_REV] >= 0x11) {
-		err = drm_dp_dpcd_readb(&anx78xx->aux, DP_SET_POWER, &dpcd[0]);
-		if (err < 0) {
-			DRM_ERROR("Failed to read DP_SET_POWER register: %d\n",
-				  err);
-			return err;
-		}
-
-		dpcd[0] &= ~DP_SET_POWER_MASK;
-		dpcd[0] |= DP_SET_POWER_D0;
-
-		err = drm_dp_dpcd_writeb(&anx78xx->aux, DP_SET_POWER, dpcd[0]);
-		if (err < 0) {
-			DRM_ERROR("Failed to power up DisplayPort link: %d\n",
-				  err);
-			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);
-	}
+	drm_dp_link_power_up(&anx78xx->aux, anx78xx->dpcd[DP_DPCD_REV]);
 
 	/* Possibly enable downspread on the sink */
 	err = regmap_write(anx78xx->map[I2C_IDX_TX_P0],
-- 
2.43.0