Returns the number of bytes transferred (1) on success.
Check the return value to confirm that AUX communication is successful.
Fixes: f70ac097a2cf ("drm/mediatek: Add MT8195 Embedded DisplayPort driver")
Signed-off-by: Liankun Yang <liankun.y...@mediatek.com>
---
Changes in V3:
- Using drm_dp_read_sink_count() to improve patch.
Per suggestion from the previous thread:
https://patchwork.kernel.org/project/linux-mediatek/patch/20241128030940.25657-1-liankun.y...@mediatek.com/
Changes in V2:
- Modify Fixes in Commit Message.
Per suggestion from the previous thread:
https://patchwork.kernel.org/project/linux-mediatek/patch/20240930092000.5385-1-liankun.y...@mediatek.com/
---
drivers/gpu/drm/mediatek/mtk_dp.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c
b/drivers/gpu/drm/mediatek/mtk_dp.c
index 36713c176cfc..b26dad8783be 100644
--- a/drivers/gpu/drm/mediatek/mtk_dp.c
+++ b/drivers/gpu/drm/mediatek/mtk_dp.c
@@ -2100,7 +2100,6 @@ static enum drm_connector_status mtk_dp_bdg_detect(struct
drm_bridge *bridge)
struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
enum drm_connector_status ret = connector_status_disconnected;
bool enabled = mtk_dp->enabled;
- u8 sink_count = 0;
if (!mtk_dp->train_info.cable_plugged_in)
return ret;
@@ -2115,8 +2114,8 @@ static enum drm_connector_status mtk_dp_bdg_detect(struct
drm_bridge *bridge)
* function, we just need to check the HPD connection to check
* whether we connect to a sink device.
*/
- drm_dp_dpcd_readb(&mtk_dp->aux, DP_SINK_COUNT, &sink_count);
- if (DP_GET_SINK_COUNT(sink_count))
+
+ if (drm_dp_read_sink_count(&mtk_dp->aux))
ret = connector_status_connected;
if (!enabled)
--
2.45.2
