| Message ID | 20241205-dp_mst-v1-34-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 08:32:05PM -0800, Abhinav Kumar wrote: > During certain cases, the dp mst connector's panel edid can be > re-used such as getting multiple get_modes() without irq_hpd and > should be cleared in cases when the connector is destroyed or when > irq hpd is received. Add support to handle these cases for the > mst_connector's panel edid. > > Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com> > --- > drivers/gpu/drm/msm/dp/dp_mst_drm.c | 39 +++++++++++++++++++++++++++++++++++++ > 1 file changed, 39 insertions(+) > > diff --git a/drivers/gpu/drm/msm/dp/dp_mst_drm.c b/drivers/gpu/drm/msm/dp/dp_mst_drm.c > index 2d92084586b466d4953429e8a6fbf766d081cb9f..15c61fd37c418889074222c0f576778adadf51c9 100644 > --- a/drivers/gpu/drm/msm/dp/dp_mst_drm.c > +++ b/drivers/gpu/drm/msm/dp/dp_mst_drm.c > @@ -559,6 +559,34 @@ static struct msm_dp_mst_bridge_state *msm_dp_mst_br_priv_state(struct drm_atomi > &bridge->obj)); > } > > +static void msm_dp_mst_clear_panel_edid(struct msm_dp *dp_display) > +{ > + struct msm_dp_mst *mst = dp_display->msm_dp_mst; > + struct msm_dp_mst_connector *mst_conn; > + struct msm_dp_panel *dp_panel; > + struct msm_dp_mst_bridge *dp_bridge; > + int i; > + > + if (!dp_display) { > + DRM_ERROR("invalid input\n"); > + return; > + } Drop > + > + for (i = 0; i < mst->max_streams; i++) { > + dp_bridge = &mst->mst_bridge[i]; > + mst_conn = to_msm_dp_mst_connector(dp_bridge->connector); > + dp_panel = dp_bridge->msm_dp_panel; > + > + if (!dp_panel || !mst_conn || !mst_conn->mst_port) > + continue; > + > + if (dp_panel->drm_edid) { > + drm_edid_free(dp_panel->drm_edid); > + dp_panel->drm_edid = NULL; > + } > + } > +} > + > /* DP MST HPD IRQ callback */ > void msm_dp_mst_display_hpd_irq(struct msm_dp *dp_display) > { > @@ -585,6 +613,9 @@ void msm_dp_mst_display_hpd_irq(struct msm_dp *dp_display) > if (handled) { > rc = drm_dp_dpcd_writeb(mst->dp_aux, esi_res, ack[1]); > > + if (ack[1] & DP_UP_REQ_MSG_RDY) > + msm_dp_mst_clear_panel_edid(dp_display); > + > if (rc != 1) > DRM_ERROR("dpcd esi_res failed. rc=%d\n", rc); > > @@ -620,6 +651,9 @@ static int msm_dp_mst_connector_get_modes(struct drm_connector *connector) > struct msm_dp_mst *mst = dp_display->msm_dp_mst; > struct msm_dp_panel *dp_panel = mst_conn->dp_panel; > > + if (dp_panel->drm_edid) > + goto duplicate_edid; > + > drm_edid_free(dp_panel->drm_edid); > > dp_panel->drm_edid = drm_dp_mst_edid_read(connector, &mst->mst_mgr, mst_conn->mst_port); > @@ -628,6 +662,7 @@ static int msm_dp_mst_connector_get_modes(struct drm_connector *connector) > return -EINVAL; > } > > +duplicate_edid: > drm_edid_connector_update(connector, dp_panel->drm_edid); No need to update connector. Goto to the next line instead. > > return drm_edid_connector_add_modes(connector); > @@ -894,6 +929,10 @@ static int msm_dp_mst_connector_atomic_check(struct drm_connector *connector, > static void dp_mst_connector_destroy(struct drm_connector *connector) > { > struct msm_dp_mst_connector *mst_conn = to_msm_dp_mst_connector(connector); > + struct msm_dp_panel *dp_panel = mst_conn->dp_panel; > + > + drm_edid_free(dp_panel->drm_edid); > + dp_panel->drm_edid = NULL; > > drm_connector_cleanup(connector); > drm_dp_mst_put_port_malloc(mst_conn->mst_port); > > -- > 2.34.1 >
diff --git a/drivers/gpu/drm/msm/dp/dp_mst_drm.c b/drivers/gpu/drm/msm/dp/dp_mst_drm.c index 2d92084586b466d4953429e8a6fbf766d081cb9f..15c61fd37c418889074222c0f576778adadf51c9 100644 --- a/drivers/gpu/drm/msm/dp/dp_mst_drm.c +++ b/drivers/gpu/drm/msm/dp/dp_mst_drm.c @@ -559,6 +559,34 @@ static struct msm_dp_mst_bridge_state *msm_dp_mst_br_priv_state(struct drm_atomi &bridge->obj)); } +static void msm_dp_mst_clear_panel_edid(struct msm_dp *dp_display) +{ + struct msm_dp_mst *mst = dp_display->msm_dp_mst; + struct msm_dp_mst_connector *mst_conn; + struct msm_dp_panel *dp_panel; + struct msm_dp_mst_bridge *dp_bridge; + int i; + + if (!dp_display) { + DRM_ERROR("invalid input\n"); + return; + } + + for (i = 0; i < mst->max_streams; i++) { + dp_bridge = &mst->mst_bridge[i]; + mst_conn = to_msm_dp_mst_connector(dp_bridge->connector); + dp_panel = dp_bridge->msm_dp_panel; + + if (!dp_panel || !mst_conn || !mst_conn->mst_port) + continue; + + if (dp_panel->drm_edid) { + drm_edid_free(dp_panel->drm_edid); + dp_panel->drm_edid = NULL; + } + } +} + /* DP MST HPD IRQ callback */ void msm_dp_mst_display_hpd_irq(struct msm_dp *dp_display) { @@ -585,6 +613,9 @@ void msm_dp_mst_display_hpd_irq(struct msm_dp *dp_display) if (handled) { rc = drm_dp_dpcd_writeb(mst->dp_aux, esi_res, ack[1]); + if (ack[1] & DP_UP_REQ_MSG_RDY) + msm_dp_mst_clear_panel_edid(dp_display); + if (rc != 1) DRM_ERROR("dpcd esi_res failed. rc=%d\n", rc); @@ -620,6 +651,9 @@ static int msm_dp_mst_connector_get_modes(struct drm_connector *connector) struct msm_dp_mst *mst = dp_display->msm_dp_mst; struct msm_dp_panel *dp_panel = mst_conn->dp_panel; + if (dp_panel->drm_edid) + goto duplicate_edid; + drm_edid_free(dp_panel->drm_edid); dp_panel->drm_edid = drm_dp_mst_edid_read(connector, &mst->mst_mgr, mst_conn->mst_port); @@ -628,6 +662,7 @@ static int msm_dp_mst_connector_get_modes(struct drm_connector *connector) return -EINVAL; } +duplicate_edid: drm_edid_connector_update(connector, dp_panel->drm_edid); return drm_edid_connector_add_modes(connector); @@ -894,6 +929,10 @@ static int msm_dp_mst_connector_atomic_check(struct drm_connector *connector, static void dp_mst_connector_destroy(struct drm_connector *connector) { struct msm_dp_mst_connector *mst_conn = to_msm_dp_mst_connector(connector); + struct msm_dp_panel *dp_panel = mst_conn->dp_panel; + + drm_edid_free(dp_panel->drm_edid); + dp_panel->drm_edid = NULL; drm_connector_cleanup(connector); drm_dp_mst_put_port_malloc(mst_conn->mst_port);
During certain cases, the dp mst connector's panel edid can be re-used such as getting multiple get_modes() without irq_hpd and should be cleared in cases when the connector is destroyed or when irq hpd is received. Add support to handle these cases for the mst_connector's panel edid. Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com> --- drivers/gpu/drm/msm/dp/dp_mst_drm.c | 39 +++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+)