Hi Neil,
Thanks for your comments,
>
> Hi,
>
> On 26/07/2023 03:48, Sandor Yu wrote:
> > 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.yu@xxxxxxx>
> > ---
> > drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 21 ++++-----------------
> > 1 file changed, 4 insertions(+), 17 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> > b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> > index 9a3db5234a0e0..6fa4848591226 100644
> > --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> > +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> > @@ -196,7 +196,6 @@ struct dw_hdmi {
> >
> > hdmi_codec_plugged_cb plugged_cb;
> > struct device *codec_dev;
> > - enum drm_connector_status last_connector_result;
> > };
> >
> > #define HDMI_IH_PHY_STAT0_RX_SENSE \ @@ -235,7 +234,7 @@ int
> > dw_hdmi_set_plugged_cb(struct dw_hdmi *hdmi, hdmi_codec_plugged_cb
> fn,
> > mutex_lock(&hdmi->mutex);
> > hdmi->plugged_cb = fn;
> > hdmi->codec_dev = codec_dev;
> > - plugged = hdmi->last_connector_result ==
> connector_status_connected;
> > + plugged = hdmi->connector.status == connector_status_connected;
>
> Please use curr_conn instead, connector is not always valid.
curr_conn is NULL when dw_hdmi_set_plugged_cb is called by dw_hdmi_bridge_atomic_disable.
I will add the variable of last_connector_resul back to driver later.
B.R
Sandor
>
> > handle_plugged_change(hdmi, plugged);
> > mutex_unlock(&hdmi->mutex);
> >
> > @@ -2446,20 +2445,7 @@ static void dw_hdmi_update_phy_mask(struct
> > dw_hdmi *hdmi)
> >
> > 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);
> > -
> > - return result;
> > + return hdmi->phy.ops->read_hpd(hdmi, hdmi->phy.data);
> > }
> >
> > static struct edid *dw_hdmi_get_edid(struct dw_hdmi *hdmi, @@
> > -2958,6 +2944,7 @@ 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);
> > }
> >
> > @@ -2976,6 +2963,7 @@ 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);
> > }
> >
> > @@ -3369,7 +3357,6 @@ struct dw_hdmi *dw_hdmi_probe(struct
> platform_device *pdev,
> > hdmi->rxsense = true;
> > hdmi->phy_mask = (u8)~(HDMI_PHY_HPD |
> HDMI_PHY_RX_SENSE);
> > hdmi->mc_clkdis = 0x7f;
> > - hdmi->last_connector_result = connector_status_disconnected;
> >
> > mutex_init(&hdmi->mutex);
> > mutex_init(&hdmi->audio_mutex);
>
> Thanks,
> Neil
