| Message ID | 20241205-dp_mst-v1-8-f8618d42a99a@quicinc.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | drm/msm/dp: Add MST support for MSM chipsets | expand |
On Thu, Dec 05, 2024 at 08:31:39PM -0800, Abhinav Kumar wrote: > dp_display_disable() handles special case of when monitor is > disconnected from the dongle while the dongle stays connected > thereby needing a separate function dp_ctrl_off_link_stream() > for this. However with a slight rework this can still be handled > by keeping common paths same for regular and special case. > > Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com> > --- > drivers/gpu/drm/msm/dp/dp_ctrl.c | 29 +++++++++++++++-------------- > drivers/gpu/drm/msm/dp/dp_ctrl.h | 4 ++++ > drivers/gpu/drm/msm/dp/dp_display.c | 25 ++++++++++++------------- > 3 files changed, 31 insertions(+), 27 deletions(-) > Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Nevertheless, > @@ -905,20 +905,19 @@ static int msm_dp_display_disable(struct msm_dp_display_private *dp) > if (!msm_dp_display->power_on) > return 0; > > - if (dp->link->sink_count == 0) { > - /* > - * irq_hpd with sink_count = 0 > - * hdmi unplugged out of dongle > - */ > - msm_dp_ctrl_off_link_stream(dp->ctrl); > - } else { > - /* > - * unplugged interrupt > - * dongle unplugged out of DUT > - */ > - msm_dp_ctrl_off(dp->ctrl); > + msm_dp_ctrl_clear_vsc_sdp_pkt(dp->ctrl); > + > + /* dongle is still connected but sinks are disconnected */ > + if (dp->link->sink_count == 0) > + msm_dp_ctrl_psm_config(dp->ctrl); > + > + msm_dp_ctrl_off(dp->ctrl); > + > + /* re-init the PHY so that we can listen to Dongle disconnect */ > + if (dp->link->sink_count == 0) It might be better to have just two codepaths: if (sink_count == 0) { msm_dp_ctrl_clear_vsc_sdp_pkt() msm_dp_ctrl_psm_config() msm_dp_ctrl_off() msm_dp_ctrl_reinit_phy() } else { msm_dp_ctrl_clear_vsc_sdp_pkt() msm_dp_ctrl_off() msm_dp_display_host_phy_exit() } > + msm_dp_ctrl_reinit_phy(dp->ctrl); > + else > msm_dp_display_host_phy_exit(dp); > - } > > msm_dp_display->power_on = false; > > > -- > 2.34.1 >
diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c index 763bd58c24d29d49caafb76eab32b493e1618e7b..9e08996be0cb969cb96d9a3019c445ab4dfc92ef 100644 --- a/drivers/gpu/drm/msm/dp/dp_ctrl.c +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c @@ -2042,30 +2042,31 @@ int msm_dp_ctrl_on_stream(struct msm_dp_ctrl *msm_dp_ctrl) return ret; } -void msm_dp_ctrl_off_link_stream(struct msm_dp_ctrl *msm_dp_ctrl) +void msm_dp_ctrl_clear_vsc_sdp_pkt(struct msm_dp_ctrl *msm_dp_ctrl) { struct msm_dp_ctrl_private *ctrl; - struct phy *phy; ctrl = container_of(msm_dp_ctrl, struct msm_dp_ctrl_private, msm_dp_ctrl); - phy = ctrl->phy; - msm_dp_catalog_panel_disable_vsc_sdp(ctrl->catalog); +} - /* set dongle to D3 (power off) mode */ - msm_dp_link_psm_config(ctrl->link, &ctrl->panel->link_info, true); +void msm_dp_ctrl_psm_config(struct msm_dp_ctrl *msm_dp_ctrl) +{ + struct msm_dp_ctrl_private *ctrl; - msm_dp_catalog_ctrl_mainlink_ctrl(ctrl->catalog, false); + ctrl = container_of(msm_dp_ctrl, struct msm_dp_ctrl_private, msm_dp_ctrl); - if (ctrl->stream_clks_on) { - clk_disable_unprepare(ctrl->pixel_clk); - ctrl->stream_clks_on = false; - } + /* set dongle to D3 (power off) mode */ + msm_dp_link_psm_config(ctrl->link, &ctrl->panel->link_info, true); +} - dev_pm_opp_set_rate(ctrl->dev, 0); - msm_dp_ctrl_link_clk_disable(&ctrl->msm_dp_ctrl); +void msm_dp_ctrl_reinit_phy(struct msm_dp_ctrl *msm_dp_ctrl) +{ + struct msm_dp_ctrl_private *ctrl; + struct phy *phy; - phy_power_off(phy); + ctrl = container_of(msm_dp_ctrl, struct msm_dp_ctrl_private, msm_dp_ctrl); + phy = ctrl->phy; /* aux channel down, reinit phy */ phy_exit(phy); diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.h b/drivers/gpu/drm/msm/dp/dp_ctrl.h index 42745c912adbad7221c78f5cecefa730bfda1e75..0f58b63c5c7c5aab43c0db2a697ba491959b79d2 100644 --- a/drivers/gpu/drm/msm/dp/dp_ctrl.h +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.h @@ -42,4 +42,8 @@ void msm_dp_ctrl_config_psr(struct msm_dp_ctrl *msm_dp_ctrl); int msm_dp_ctrl_core_clk_enable(struct msm_dp_ctrl *msm_dp_ctrl); void msm_dp_ctrl_core_clk_disable(struct msm_dp_ctrl *msm_dp_ctrl); +void msm_dp_ctrl_clear_vsc_sdp_pkt(struct msm_dp_ctrl *msm_dp_ctrl); +void msm_dp_ctrl_psm_config(struct msm_dp_ctrl *msm_dp_ctrl); +void msm_dp_ctrl_reinit_phy(struct msm_dp_ctrl *msm_dp_ctrl); + #endif /* _DP_CTRL_H_ */ diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index 434380b442ec84c12c240dab6538ccdf31963cea..bbce8ca09ff70059458231982f002e1f22d2c3ab 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -905,20 +905,19 @@ static int msm_dp_display_disable(struct msm_dp_display_private *dp) if (!msm_dp_display->power_on) return 0; - if (dp->link->sink_count == 0) { - /* - * irq_hpd with sink_count = 0 - * hdmi unplugged out of dongle - */ - msm_dp_ctrl_off_link_stream(dp->ctrl); - } else { - /* - * unplugged interrupt - * dongle unplugged out of DUT - */ - msm_dp_ctrl_off(dp->ctrl); + msm_dp_ctrl_clear_vsc_sdp_pkt(dp->ctrl); + + /* dongle is still connected but sinks are disconnected */ + if (dp->link->sink_count == 0) + msm_dp_ctrl_psm_config(dp->ctrl); + + msm_dp_ctrl_off(dp->ctrl); + + /* re-init the PHY so that we can listen to Dongle disconnect */ + if (dp->link->sink_count == 0) + msm_dp_ctrl_reinit_phy(dp->ctrl); + else msm_dp_display_host_phy_exit(dp); - } msm_dp_display->power_on = false;
dp_display_disable() handles special case of when monitor is disconnected from the dongle while the dongle stays connected thereby needing a separate function dp_ctrl_off_link_stream() for this. However with a slight rework this can still be handled by keeping common paths same for regular and special case. Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com> --- drivers/gpu/drm/msm/dp/dp_ctrl.c | 29 +++++++++++++++-------------- drivers/gpu/drm/msm/dp/dp_ctrl.h | 4 ++++ drivers/gpu/drm/msm/dp/dp_display.c | 25 ++++++++++++------------- 3 files changed, 31 insertions(+), 27 deletions(-)