On Mon, 18 Sept 2023 at 23:16, Kuogee Hsieh <quic_khsieh@xxxxxxxxxxx> wrote:
>
>
> On 9/15/2023 5:41 PM, Dmitry Baryshkov wrote:
> > On Sat, 16 Sept 2023 at 00:38, Kuogee Hsieh <quic_khsieh@xxxxxxxxxxx> wrote:
> >> Currently DP driver use drm_helper_hpd_irq_event(), bypassing drm bridge
> >> framework, to report HPD status changes to user space frame work.
> >> Replace it with drm_bridge_hpd_notify() since DP driver is part of drm
> >> bridge.
> >>
> >> Signed-off-by: Kuogee Hsieh <quic_khsieh@xxxxxxxxxxx>
> > Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
> >
> > Also see the comment below.
> >
> >> ---
> >> drivers/gpu/drm/msm/dp/dp_display.c | 20 ++------------------
> >> 1 file changed, 2 insertions(+), 18 deletions(-)
> >>
> >> diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
> >> index 18d16c7..59f9d85 100644
> >> --- a/drivers/gpu/drm/msm/dp/dp_display.c
> >> +++ b/drivers/gpu/drm/msm/dp/dp_display.c
> >> @@ -356,26 +356,10 @@ static bool dp_display_is_sink_count_zero(struct dp_display_private *dp)
> >> (dp->link->sink_count == 0);
> >> }
> >>
> >> -static void dp_display_send_hpd_event(struct msm_dp *dp_display)
> >> -{
> >> - struct dp_display_private *dp;
> >> - struct drm_connector *connector;
> >> -
> >> - dp = container_of(dp_display, struct dp_display_private, dp_display);
> >> -
> >> - connector = dp->dp_display.connector;
> >> - drm_helper_hpd_irq_event(connector->dev);
> >> -}
> >> -
> >> static int dp_display_send_hpd_notification(struct dp_display_private *dp,
> >> bool hpd)
> >> {
> >> - if ((hpd && dp->dp_display.link_ready) ||
> >> - (!hpd && !dp->dp_display.link_ready)) {
> >> - drm_dbg_dp(dp->drm_dev, "HPD already %s\n",
> >> - (hpd ? "on" : "off"));
> >> - return 0;
> >> - }
> >> + struct drm_bridge *bridge = dp->dp_display.bridge;
> >>
> >> /* reset video pattern flag on disconnect */
> >> if (!hpd)
> > Note, this part (resetting the video_test and setting of is_connected)
> > should be moved to the dp_bridge_hpd_notify() too. Please ignore this
> > comment if this is handled later in the series.
>
> I think keep them here is better since eDP does not populate hpd_enable,
> hpd_disable and hpd_notify at edp_bridge_ops at drm_bridge_attach().
>
> Keep them here will work for both eDP and DP.
Having them here doesn't work for DP-with-external-bridges, which will
not use dp_display_send_hpd_notification.
>
>
> >
> >
> >> @@ -385,7 +369,7 @@ static int dp_display_send_hpd_notification(struct dp_display_private *dp,
> >>
> >> drm_dbg_dp(dp->drm_dev, "type=%d hpd=%d\n",
> >> dp->dp_display.connector_type, hpd);
> >> - dp_display_send_hpd_event(&dp->dp_display);
> >> + drm_bridge_hpd_notify(bridge, dp->dp_display.link_ready);
> >>
> >> return 0;
> >> }
> >> --
> >> 2.7.4
> >>
> >
--
With best wishes
Dmitry
