[PATCH v2] drm/bridge: anx7625: Set downstream sink into normal status

[Xin Ji]

As downstream sink was set into standby mode while bridge disabled,
this patch used for setting downstream sink into normal status
while enable bridge.

Signed-off-by: Xin Ji <x...@analogixsemi.com>
Reviewed-by: Pin-Yen Lin <treapk...@chromium.org>

---
V1 -> V2: use dev_dbg replace of dev_info
---
 drivers/gpu/drm/bridge/analogix/anx7625.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c 
b/drivers/gpu/drm/bridge/analogix/anx7625.c
index 9a2a19ad4202..dcf3275a00fe 100644
--- a/drivers/gpu/drm/bridge/analogix/anx7625.c
+++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
@@ -924,12 +924,20 @@ static void anx7625_dp_start(struct anx7625_data *ctx)
 {
        int ret;
        struct device *dev = &ctx->client->dev;
+       u8 data;
 
        if (!ctx->display_timing_valid) {
                DRM_DEV_ERROR(dev, "mipi not set display timing yet.\n");
                return;
        }
 
+       dev_dbg(dev, "set downstream sink into normal\n");
+       /* Downstream sink enter into normal mode */
+       data = 1;
+       ret = anx7625_aux_trans(ctx, DP_AUX_NATIVE_WRITE, 0x000600, 1, &data);
+       if (ret < 0)
+               dev_err(dev, "IO error : set sink into normal mode fail\n");
+
        /* Disable HDCP */
        anx7625_write_and(ctx, ctx->i2c.rx_p1_client, 0xee, 0x9f);
 
-- 
2.25.1