On Tue, 18 Jan 2022 at 22:41, Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx> wrote:
>
>
>
> On 12/7/2021 2:29 PM, Dmitry Baryshkov wrote:
> > Currently the DSI driver has two separate paths: one if the next device
> > in a chain is a bridge and another one if the panel is connected
> > directly to the DSI host. Simplify the code path by using panel-bridge
> > driver (already selected in Kconfig) and dropping support for
> > handling the panel directly.
> >
> > Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
> > ---
> > drivers/gpu/drm/msm/dsi/dsi.c | 32 +---
> > drivers/gpu/drm/msm/dsi/dsi.h | 10 +-
> > drivers/gpu/drm/msm/dsi/dsi_host.c | 20 +-
> > drivers/gpu/drm/msm/dsi/dsi_manager.c | 257 +++-----------------------
> > 4 files changed, 32 insertions(+), 287 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/msm/dsi/dsi.c b/drivers/gpu/drm/msm/dsi/dsi.c
> > index 9670e548b3e9..b61f451a282e 100644
> > --- a/drivers/gpu/drm/msm/dsi/dsi.c
> > +++ b/drivers/gpu/drm/msm/dsi/dsi.c
> > @@ -208,7 +208,7 @@ int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev,
> > struct drm_encoder *encoder)
> > {
> > struct msm_drm_private *priv;
> > - struct drm_bridge *ext_bridge;
> > + struct drm_connector *connector;
> > int ret;
> >
> > if (WARN_ON(!encoder) || WARN_ON(!msm_dsi) || WARN_ON(!dev))
> > @@ -238,31 +238,17 @@ int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev,
> > goto fail;
> > }
> >
> > - /*
> > - * check if the dsi encoder output is connected to a panel or an
> > - * external bridge. We create a connector only if we're connected to a
> > - * drm_panel device. When we're connected to an external bridge, we
> > - * assume that the drm_bridge driver will create the connector itself.
> > - */
> > - ext_bridge = msm_dsi_host_get_bridge(msm_dsi->host);
> > -
> > - if (ext_bridge)
> > - msm_dsi->connector =
> > - msm_dsi_manager_ext_bridge_init(msm_dsi->id);
> > - else
> > - msm_dsi->connector =
> > - msm_dsi_manager_connector_init(msm_dsi->id);
> > -
> > - if (IS_ERR(msm_dsi->connector)) {
> > - ret = PTR_ERR(msm_dsi->connector);
> > + connector = msm_dsi_manager_ext_bridge_init(msm_dsi->id);
> > +
> > + if (IS_ERR(connector)) {
> > + ret = PTR_ERR(connector);
> > DRM_DEV_ERROR(dev->dev,
> > "failed to create dsi connector: %d\n", ret);
> > - msm_dsi->connector = NULL;
> > goto fail;
> > }
> Please correct my understanding if incorrect. Here you are expecting
> that the existing panels/bridges have already used
> drm_panel_bridge_add_typed add the bridge? Otherwise we will goto the
> fail goto?
No.
>
> @@ -727,8 +509,11 @@ struct drm_connector
> *msm_dsi_manager_ext_bridge_init(u8 id)
> int ret;
>
> int_bridge = msm_dsi->bridge;
> - ext_bridge = msm_dsi->external_bridge =
> - msm_dsi_host_get_bridge(msm_dsi->host);
> + ext_bridge = msm_dsi_host_get_bridge(msm_dsi->host);
> + if (IS_ERR(ext_bridge))
> + return ERR_PTR(PTR_ERR(ext_bridge));
> +
> + msm_dsi->external_bridge = ext_bridge;
>
> Does that mean you plan to migrate the existing msm panels/bridges to
> use devm_drm_panel_bridge_add_typed?
No. panel-bridge.c/devm_drm_of_get_bridge() does that in a transparent
way. It calls devm_drm_panel_bridge_add() on it's own.
> >
> > priv->bridges[priv->num_bridges++] = msm_dsi->bridge;
> > - priv->connectors[priv->num_connectors++] = msm_dsi->connector;
> > + priv->connectors[priv->num_connectors++] = connector;
> >
> > return 0;
> > fail:
> > @@ -272,12 +258,6 @@ int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev,
> > msm_dsi->bridge = NULL;
> > }
> >
> > - /* don't destroy connector if we didn't make it */
> > - if (msm_dsi->connector && !msm_dsi->external_bridge)
> > - msm_dsi->connector->funcs->destroy(msm_dsi->connector);
> > -
> > - msm_dsi->connector = NULL;
> > -
> > return ret;
> > }
> >
> > diff --git a/drivers/gpu/drm/msm/dsi/dsi.h b/drivers/gpu/drm/msm/dsi/dsi.h
> > index f46df52c6985..7eb778070a8c 100644
> > --- a/drivers/gpu/drm/msm/dsi/dsi.h
> > +++ b/drivers/gpu/drm/msm/dsi/dsi.h
> > @@ -49,8 +49,6 @@ struct msm_dsi {
> > struct drm_device *dev;
> > struct platform_device *pdev;
> >
> > - /* connector managed by us when we're connected to a drm_panel */
> > - struct drm_connector *connector;
> > /* internal dsi bridge attached to MDP interface */
> > struct drm_bridge *bridge;
> >
> > @@ -58,10 +56,8 @@ struct msm_dsi {
> > struct msm_dsi_phy *phy;
> >
> > /*
> > - * panel/external_bridge connected to dsi bridge output, only one of the
> > - * two can be valid at a time
> > + * external_bridge connected to dsi bridge output
> > */
> > - struct drm_panel *panel;
> > struct drm_bridge *external_bridge;
> >
> > struct device *phy_dev;
> > @@ -76,7 +72,6 @@ struct msm_dsi {
> > /* dsi manager */
> > struct drm_bridge *msm_dsi_manager_bridge_init(u8 id);
> > void msm_dsi_manager_bridge_destroy(struct drm_bridge *bridge);
> > -struct drm_connector *msm_dsi_manager_connector_init(u8 id);
> > struct drm_connector *msm_dsi_manager_ext_bridge_init(u8 id);
> > int msm_dsi_manager_cmd_xfer(int id, const struct mipi_dsi_msg *msg);
> > bool msm_dsi_manager_cmd_xfer_trigger(int id, u32 dma_base, u32 len);
> > @@ -88,7 +83,7 @@ void msm_dsi_manager_tpg_enable(void);
> > /* msm dsi */
> > static inline bool msm_dsi_device_connected(struct msm_dsi *msm_dsi)
> > {
> > - return msm_dsi->panel || msm_dsi->external_bridge;
> > + return msm_dsi->external_bridge;
> > }
> >
> > struct drm_encoder *msm_dsi_get_encoder(struct msm_dsi *msm_dsi);
> > @@ -115,7 +110,6 @@ int msm_dsi_host_power_on(struct mipi_dsi_host *host,
> > int msm_dsi_host_power_off(struct mipi_dsi_host *host);
> > int msm_dsi_host_set_display_mode(struct mipi_dsi_host *host,
> > const struct drm_display_mode *mode);
> > -struct drm_panel *msm_dsi_host_get_panel(struct mipi_dsi_host *host);
> > unsigned long msm_dsi_host_get_mode_flags(struct mipi_dsi_host *host);
> > struct drm_bridge *msm_dsi_host_get_bridge(struct mipi_dsi_host *host);
> > int msm_dsi_host_register(struct mipi_dsi_host *host);
> > diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
> > index 5b4bb722f750..58bd48d4ec03 100644
> > --- a/drivers/gpu/drm/msm/dsi/dsi_host.c
> > +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
> > @@ -159,7 +159,6 @@ struct msm_dsi_host {
> > struct drm_display_mode *mode;
> >
> > /* connected device info */
> > - struct device_node *device_node;
> > unsigned int channel;
> > unsigned int lanes;
> > enum mipi_dsi_pixel_format format;
> > @@ -1604,8 +1603,6 @@ static int dsi_host_detach(struct mipi_dsi_host *host,
> >
> > dsi_dev_detach(msm_host->pdev);
> >
> > - msm_host->device_node = NULL;
> > -
> > DBG("id=%d", msm_host->id);
> > if (msm_host->dev)
> > queue_work(msm_host->workqueue, &msm_host->hpd_work);
> > @@ -1745,16 +1742,6 @@ static int dsi_host_parse_dt(struct msm_dsi_host *msm_host)
> > goto err;
> > }
> >
> > - /* Get panel node from the output port's endpoint data */
> > - device_node = of_graph_get_remote_node(np, 1, 0);
> > - if (!device_node) {
> > - DRM_DEV_DEBUG(dev, "%s: no valid device\n", __func__);
> > - ret = -ENODEV;
> > - goto err;
> > - }
> > -
> > - msm_host->device_node = device_node;
> > -
> > if (of_property_read_bool(np, "syscon-sfpb")) {
> > msm_host->sfpb = syscon_regmap_lookup_by_phandle(np,
> > "syscon-sfpb");
> > @@ -2405,11 +2392,6 @@ int msm_dsi_host_set_display_mode(struct mipi_dsi_host *host,
> > return 0;
> > }
> >
> > -struct drm_panel *msm_dsi_host_get_panel(struct mipi_dsi_host *host)
> > -{
> > - return of_drm_find_panel(to_msm_dsi_host(host)->device_node);
> > -}
> > -
> > unsigned long msm_dsi_host_get_mode_flags(struct mipi_dsi_host *host)
> > {
> > return to_msm_dsi_host(host)->mode_flags;
> > @@ -2419,7 +2401,7 @@ struct drm_bridge *msm_dsi_host_get_bridge(struct mipi_dsi_host *host)
> > {
> > struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
> >
> > - return of_drm_find_bridge(msm_host->device_node);
> > + return devm_drm_of_get_bridge(&msm_host->pdev->dev, msm_host->pdev->dev.of_node, 1, 0);
> > }
> >
> > void msm_dsi_host_snapshot(struct msm_disp_state *disp_state, struct mipi_dsi_host *host)
> > diff --git a/drivers/gpu/drm/msm/dsi/dsi_manager.c b/drivers/gpu/drm/msm/dsi/dsi_manager.c
> > index 497719efb9e9..43b8a1268c4b 100644
> > --- a/drivers/gpu/drm/msm/dsi/dsi_manager.c
> > +++ b/drivers/gpu/drm/msm/dsi/dsi_manager.c
> > @@ -188,39 +188,26 @@ static void dsi_mgr_phy_disable(int id)
> > }
> > }
> >
> > -struct dsi_connector {
> > - struct drm_connector base;
> > - int id;
> > -};
> > -
> > struct dsi_bridge {
> > struct drm_bridge base;
> > int id;
> > };
> >
> > -#define to_dsi_connector(x) container_of(x, struct dsi_connector, base)
> > #define to_dsi_bridge(x) container_of(x, struct dsi_bridge, base)
> >
> > -static inline int dsi_mgr_connector_get_id(struct drm_connector *connector)
> > -{
> > - struct dsi_connector *dsi_connector = to_dsi_connector(connector);
> > - return dsi_connector->id;
> > -}
> > -
> > static int dsi_mgr_bridge_get_id(struct drm_bridge *bridge)
> > {
> > struct dsi_bridge *dsi_bridge = to_dsi_bridge(bridge);
> > return dsi_bridge->id;
> > }
> >
> > -static int msm_dsi_manager_panel_init(struct drm_connector *conn, u8 id)
> > +static void msm_dsi_manager_set_split_display(u8 id)
> > {
> > - struct msm_drm_private *priv = conn->dev->dev_private;
> > - struct msm_kms *kms = priv->kms;
> > struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
> > struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
> > + struct msm_drm_private *priv = msm_dsi->dev->dev_private;
> > + struct msm_kms *kms = priv->kms;
> > struct msm_dsi *master_dsi, *slave_dsi;
> > - struct drm_panel *panel;
> >
> > if (IS_BONDED_DSI() && !IS_MASTER_DSI_LINK(id)) {
> > master_dsi = other_dsi;
> > @@ -230,88 +217,29 @@ static int msm_dsi_manager_panel_init(struct drm_connector *conn, u8 id)
> > slave_dsi = other_dsi;
> > }
> >
> > - /*
> > - * There is only 1 panel in the global panel list for bonded DSI mode.
> > - * Therefore slave dsi should get the drm_panel instance from master
> > - * dsi.
> > - */
> > - panel = msm_dsi_host_get_panel(master_dsi->host);
> > - if (IS_ERR(panel)) {
> > - DRM_ERROR("Could not find panel for %u (%ld)\n", msm_dsi->id,
> > - PTR_ERR(panel));
> > - return PTR_ERR(panel);
> > - }
> > -
> > - if (!panel || !IS_BONDED_DSI())
> > - goto out;
> > -
> > - drm_object_attach_property(&conn->base,
> > - conn->dev->mode_config.tile_property, 0);
> > + if (!msm_dsi->external_bridge || !IS_BONDED_DSI())
> > + return;
> >
> > /*
> > * Set split display info to kms once bonded DSI panel is connected to
> > * both hosts.
> > */
> > - if (other_dsi && other_dsi->panel && kms->funcs->set_split_display) {
> > + if (other_dsi && other_dsi->external_bridge && kms->funcs->set_split_display) {
> > kms->funcs->set_split_display(kms, master_dsi->encoder,
> > slave_dsi->encoder,
> > msm_dsi_is_cmd_mode(msm_dsi));
> > }
> > -
> > -out:
> > - msm_dsi->panel = panel;
> > - return 0;
> > -}
> > -
> > -static enum drm_connector_status dsi_mgr_connector_detect(
> > - struct drm_connector *connector, bool force)
> > -{
> > - int id = dsi_mgr_connector_get_id(connector);
> > - struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
> > -
> > - return msm_dsi->panel ? connector_status_connected :
> > - connector_status_disconnected;
> > -}
> > -
> > -static void dsi_mgr_connector_destroy(struct drm_connector *connector)
> > -{
> > - struct dsi_connector *dsi_connector = to_dsi_connector(connector);
> > -
> > - DBG("");
> > -
> > - drm_connector_cleanup(connector);
> > -
> > - kfree(dsi_connector);
> > -}
> > -
> > -static int dsi_mgr_connector_get_modes(struct drm_connector *connector)
> > -{
> > - int id = dsi_mgr_connector_get_id(connector);
> > - struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
> > - struct drm_panel *panel = msm_dsi->panel;
> > - int num;
> > -
> > - if (!panel)
> > - return 0;
> > -
> > - /*
> > - * In bonded DSI mode, we have one connector that can be
> > - * attached to the drm_panel.
> > - */
> > - num = drm_panel_get_modes(panel, connector);
> > - if (!num)
> > - return 0;
> > -
> > - return num;
> > }
> >
> > -static enum drm_mode_status dsi_mgr_connector_mode_valid(struct drm_connector *connector,
> > - struct drm_display_mode *mode)
> > +static enum drm_mode_status dsi_mgr_bridge_mode_valid(struct drm_bridge *bridge,
> > + const struct drm_display_info *info,
> > + const struct drm_display_mode *mode)
> > {
> > - int id = dsi_mgr_connector_get_id(connector);
> > + int id = dsi_mgr_bridge_get_id(bridge);
> > struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
> > struct drm_encoder *encoder = msm_dsi_get_encoder(msm_dsi);
> > - struct msm_drm_private *priv = connector->dev->dev_private;
> > + struct drm_device *dev = msm_dsi->dev;
> > + struct msm_drm_private *priv = dev->dev_private;
> > struct msm_kms *kms = priv->kms;
> > long actual, requested;
> >
> > @@ -326,16 +254,6 @@ static enum drm_mode_status dsi_mgr_connector_mode_valid(struct drm_connector *c
> > return MODE_OK;
> > }
> >
> > -static struct drm_encoder *
> > -dsi_mgr_connector_best_encoder(struct drm_connector *connector)
> > -{
> > - int id = dsi_mgr_connector_get_id(connector);
> > - struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
> > -
> > - DBG("");
> > - return msm_dsi_get_encoder(msm_dsi);
> > -}
> > -
> > static void dsi_mgr_bridge_power_on(struct drm_bridge *bridge)
> > {
> > int id = dsi_mgr_bridge_get_id(bridge);
> > @@ -398,7 +316,6 @@ static void dsi_mgr_bridge_pre_enable(struct drm_bridge *bridge)
> > struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
> > struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
> > struct mipi_dsi_host *host = msm_dsi->host;
> > - struct drm_panel *panel = msm_dsi->panel;
> > bool is_bonded_dsi = IS_BONDED_DSI();
> > int ret;
> >
> > @@ -410,18 +327,6 @@ static void dsi_mgr_bridge_pre_enable(struct drm_bridge *bridge)
> > if (is_bonded_dsi && !IS_MASTER_DSI_LINK(id))
> > return;
> >
> > - /* Always call panel functions once, because even for dual panels,
> > - * there is only one drm_panel instance.
> > - */
> > - if (panel) {
> > - ret = drm_panel_prepare(panel);
> > - if (ret) {
> > - pr_err("%s: prepare panel %d failed, %d\n", __func__,
> > - id, ret);
> > - goto panel_prep_fail;
> > - }
> > - }
> > -
> > ret = msm_dsi_host_enable(host);
> > if (ret) {
> > pr_err("%s: enable host %d failed, %d\n", __func__, id, ret);
> > @@ -441,9 +346,6 @@ static void dsi_mgr_bridge_pre_enable(struct drm_bridge *bridge)
> > host1_en_fail:
> > msm_dsi_host_disable(host);
> > host_en_fail:
> > - if (panel)
> > - drm_panel_unprepare(panel);
> > -panel_prep_fail:
> >
> > return;
> > }
> > @@ -461,62 +363,12 @@ void msm_dsi_manager_tpg_enable(void)
> > }
> > }
> >
> > -static void dsi_mgr_bridge_enable(struct drm_bridge *bridge)
> > -{
> > - int id = dsi_mgr_bridge_get_id(bridge);
> > - struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
> > - struct drm_panel *panel = msm_dsi->panel;
> > - bool is_bonded_dsi = IS_BONDED_DSI();
> > - int ret;
> > -
> > - DBG("id=%d", id);
> > - if (!msm_dsi_device_connected(msm_dsi))
> > - return;
> > -
> > - /* Do nothing with the host if it is slave-DSI in case of bonded DSI */
> > - if (is_bonded_dsi && !IS_MASTER_DSI_LINK(id))
> > - return;
> > -
> > - if (panel) {
> > - ret = drm_panel_enable(panel);
> > - if (ret) {
> > - pr_err("%s: enable panel %d failed, %d\n", __func__, id,
> > - ret);
> > - }
> > - }
> > -}
> > -
> > -static void dsi_mgr_bridge_disable(struct drm_bridge *bridge)
> > -{
> > - int id = dsi_mgr_bridge_get_id(bridge);
> > - struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
> > - struct drm_panel *panel = msm_dsi->panel;
> > - bool is_bonded_dsi = IS_BONDED_DSI();
> > - int ret;
> > -
> > - DBG("id=%d", id);
> > - if (!msm_dsi_device_connected(msm_dsi))
> > - return;
> > -
> > - /* Do nothing with the host if it is slave-DSI in case of bonded DSI */
> > - if (is_bonded_dsi && !IS_MASTER_DSI_LINK(id))
> > - return;
> > -
> > - if (panel) {
> > - ret = drm_panel_disable(panel);
> > - if (ret)
> > - pr_err("%s: Panel %d OFF failed, %d\n", __func__, id,
> > - ret);
> > - }
> > -}
> > -
> > static void dsi_mgr_bridge_post_disable(struct drm_bridge *bridge)
> > {
> > int id = dsi_mgr_bridge_get_id(bridge);
> > struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
> > struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
> > struct mipi_dsi_host *host = msm_dsi->host;
> > - struct drm_panel *panel = msm_dsi->panel;
> > bool is_bonded_dsi = IS_BONDED_DSI();
> > int ret;
> >
> > @@ -543,13 +395,6 @@ static void dsi_mgr_bridge_post_disable(struct drm_bridge *bridge)
> > pr_err("%s: host1 disable failed, %d\n", __func__, ret);
> > }
> >
> > - if (panel) {
> > - ret = drm_panel_unprepare(panel);
> > - if (ret)
> > - pr_err("%s: Panel %d unprepare failed,%d\n", __func__,
> > - id, ret);
> > - }
> > -
> > msm_dsi_host_disable_irq(host);
> > if (is_bonded_dsi && msm_dsi1)
> > msm_dsi_host_disable_irq(msm_dsi1->host);
> > @@ -594,76 +439,13 @@ static void dsi_mgr_bridge_mode_set(struct drm_bridge *bridge,
> > dsi_mgr_bridge_power_on(bridge);
> > }
> >
> > -static const struct drm_connector_funcs dsi_mgr_connector_funcs = {
> > - .detect = dsi_mgr_connector_detect,
> > - .fill_modes = drm_helper_probe_single_connector_modes,
> > - .destroy = dsi_mgr_connector_destroy,
> > - .reset = drm_atomic_helper_connector_reset,
> > - .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
> > - .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
> > -};
> > -
> > -static const struct drm_connector_helper_funcs dsi_mgr_conn_helper_funcs = {
> > - .get_modes = dsi_mgr_connector_get_modes,
> > - .mode_valid = dsi_mgr_connector_mode_valid,
> > - .best_encoder = dsi_mgr_connector_best_encoder,
> > -};
> > -
> > static const struct drm_bridge_funcs dsi_mgr_bridge_funcs = {
> > .pre_enable = dsi_mgr_bridge_pre_enable,
> > - .enable = dsi_mgr_bridge_enable,
> > - .disable = dsi_mgr_bridge_disable,
> > .post_disable = dsi_mgr_bridge_post_disable,
> > .mode_set = dsi_mgr_bridge_mode_set,
> > + .mode_valid = dsi_mgr_bridge_mode_valid,
> > };
> >
> > -/* initialize connector when we're connected to a drm_panel */
> > -struct drm_connector *msm_dsi_manager_connector_init(u8 id)
> > -{
> > - struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
> > - struct drm_connector *connector = NULL;
> > - struct dsi_connector *dsi_connector;
> > - int ret;
> > -
> > - dsi_connector = kzalloc(sizeof(*dsi_connector), GFP_KERNEL);
> > - if (!dsi_connector)
> > - return ERR_PTR(-ENOMEM);
> > -
> > - dsi_connector->id = id;
> > -
> > - connector = &dsi_connector->base;
> > -
> > - ret = drm_connector_init(msm_dsi->dev, connector,
> > - &dsi_mgr_connector_funcs, DRM_MODE_CONNECTOR_DSI);
> > - if (ret)
> > - return ERR_PTR(ret);
> > -
> > - drm_connector_helper_add(connector, &dsi_mgr_conn_helper_funcs);
> > -
> > - /* Enable HPD to let hpd event is handled
> > - * when panel is attached to the host.
> > - */
> > - connector->polled = DRM_CONNECTOR_POLL_HPD;
> > -
> > - /* Display driver doesn't support interlace now. */
> > - connector->interlace_allowed = 0;
> > - connector->doublescan_allowed = 0;
> > -
> > - drm_connector_attach_encoder(connector, msm_dsi->encoder);
> > -
> > - ret = msm_dsi_manager_panel_init(connector, id);
> > - if (ret) {
> > - DRM_DEV_ERROR(msm_dsi->dev->dev, "init panel failed %d\n", ret);
> > - goto fail;
> > - }
> > -
> > - return connector;
> > -
> > -fail:
> > - connector->funcs->destroy(msm_dsi->connector);
> > - return ERR_PTR(ret);
> > -}
> > -
> > bool msm_dsi_manager_validate_current_config(u8 id)
> > {
> > bool is_bonded_dsi = IS_BONDED_DSI();
> > @@ -727,8 +509,11 @@ struct drm_connector *msm_dsi_manager_ext_bridge_init(u8 id)
> > int ret;
> >
> > int_bridge = msm_dsi->bridge;
> > - ext_bridge = msm_dsi->external_bridge =
> > - msm_dsi_host_get_bridge(msm_dsi->host);
> > + ext_bridge = msm_dsi_host_get_bridge(msm_dsi->host);
> > + if (IS_ERR(ext_bridge))
> > + return ERR_PTR(PTR_ERR(ext_bridge));
> > +
> > + msm_dsi->external_bridge = ext_bridge;
> >
> > encoder = msm_dsi->encoder;
> >
> > @@ -755,7 +540,7 @@ struct drm_connector *msm_dsi_manager_ext_bridge_init(u8 id)
> >
> > list_for_each_entry(connector, connector_list, head) {
> > if (drm_connector_has_possible_encoder(connector, encoder))
> > - return connector;
> > + goto out;
> > }
> >
> > return ERR_PTR(-ENODEV);
> > @@ -769,6 +554,10 @@ struct drm_connector *msm_dsi_manager_ext_bridge_init(u8 id)
> >
> > drm_connector_attach_encoder(connector, encoder);
> >
> > +out:
> > + /* The pipeline is ready, ping encoders if necessary */
> > + msm_dsi_manager_set_split_display(id);
> > +
> > return connector;
> > }
> >
--
With best wishes
Dmitry
