[PATCH v2] drm: bridge: dw_hdmi: Fix ELD is not updated issue

[Sandor Yu]

The ELD (EDID-Like Data) is not updated when the HDMI cable
is plugged into different HDMI monitors.
This is because the EDID is not updated in the HDMI HPD function.
As a result, the ELD data remains unchanged and may not reflect
the capabilities of the newly connected HDMI sink device.

To address this issue, the handle_plugged_change function should move to
the bridge_atomic_enable and bridge_atomic_disable functions.
Make sure the EDID is properly updated before updating ELD.

Signed-off-by: Sandor Yu <sandor...@nxp.com>

---
v2:
  - Add the variable of last_connector_result back to driver.
    It will only be used to initialize audio codec jack status when audio codec 
driver probe.

---
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 12 +++---------
 1 file changed, 3 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c 
b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index aa51c61a78c7..963050de42c3 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -2463,15 +2463,7 @@ static enum drm_connector_status dw_hdmi_detect(struct 
dw_hdmi *hdmi)
        enum drm_connector_status result;
 
        result = hdmi->phy.ops->read_hpd(hdmi, hdmi->phy.data);
-
-       mutex_lock(&hdmi->mutex);
-       if (result != hdmi->last_connector_result) {
-               dev_dbg(hdmi->dev, "read_hpd result: %d", result);
-               handle_plugged_change(hdmi,
-                                     result == connector_status_connected);
-               hdmi->last_connector_result = result;
-       }
-       mutex_unlock(&hdmi->mutex);
+       hdmi->last_connector_result = result;
 
        return result;
 }
@@ -2971,6 +2963,7 @@ static void dw_hdmi_bridge_atomic_disable(struct 
drm_bridge *bridge,
        hdmi->curr_conn = NULL;
        dw_hdmi_update_power(hdmi);
        dw_hdmi_update_phy_mask(hdmi);
+       handle_plugged_change(hdmi, false);
        mutex_unlock(&hdmi->mutex);
 }
 
@@ -2989,6 +2982,7 @@ static void dw_hdmi_bridge_atomic_enable(struct 
drm_bridge *bridge,
        hdmi->curr_conn = connector;
        dw_hdmi_update_power(hdmi);
        dw_hdmi_update_phy_mask(hdmi);
+       handle_plugged_change(hdmi, true);
        mutex_unlock(&hdmi->mutex);
 }
 
-- 
2.34.1