At the first time of bind, there is no any panel attach in mipi. Add a DRM_CONNECTOR_POLL_HPD porperty to detect the panel status, when panel probe, the dw_mipi_dsi_host_attach would be called, then mipi-dsi will trigger a event to notify the drm framework.
Signed-off-by: Chris Zhong zyw@rock-chips.com ---
drivers/gpu/drm/rockchip/dw-mipi-dsi.c | 41 ++++++++++++++++++++++++++++------ 1 file changed, 34 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c index 15ba796..72d7f48 100644 --- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c +++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c @@ -285,6 +285,7 @@ struct dw_mipi_dsi { struct drm_encoder encoder; struct drm_connector connector; struct mipi_dsi_host dsi_host; + struct device_node *panel_node; struct drm_panel *panel; struct device *dev; struct regmap *grf_regmap; @@ -462,7 +463,6 @@ static int dw_mipi_dsi_phy_init(struct dw_mipi_dsi *dsi) dsi_write(dsi, DSI_PHY_RSTZ, PHY_ENFORCEPLL | PHY_ENABLECLK | PHY_UNRSTZ | PHY_UNSHUTDOWNZ);
- ret = readx_poll_timeout(readl, dsi->base + DSI_PHY_STATUS, val, val & LOCK, 1000, PHY_STATUS_TIMEOUT_US); if (ret < 0) { @@ -550,11 +550,11 @@ static int dw_mipi_dsi_host_attach(struct mipi_dsi_host *host, dsi->lanes = device->lanes; dsi->channel = device->channel; dsi->format = device->format; - dsi->panel = of_drm_find_panel(device->dev.of_node); - if (dsi->panel) - return drm_panel_attach(dsi->panel, &dsi->connector); + dsi->panel_node = device->dev.of_node; + if (dsi->connector.dev) + drm_helper_hpd_irq_event(dsi->connector.dev);
- return -EINVAL; + return 0; }
static int dw_mipi_dsi_host_detach(struct mipi_dsi_host *host, @@ -562,7 +562,10 @@ static int dw_mipi_dsi_host_detach(struct mipi_dsi_host *host, { struct dw_mipi_dsi *dsi = host_to_dsi(host);
- drm_panel_detach(dsi->panel); + dsi->panel_node = NULL; + + if (dsi->connector.dev) + drm_helper_hpd_irq_event(dsi->connector.dev);
return 0; } @@ -1022,13 +1025,33 @@ static struct drm_connector_helper_funcs dw_mipi_dsi_connector_helper_funcs = { static enum drm_connector_status dw_mipi_dsi_detect(struct drm_connector *connector, bool force) { - return connector_status_connected; + struct dw_mipi_dsi *dsi = con_to_dsi(connector); + + + if (!dsi->panel) { + dsi->panel = of_drm_find_panel(dsi->panel_node); + if (dsi->panel) + drm_panel_attach(dsi->panel, &dsi->connector); + } else if (!dsi->panel_node) { + struct drm_encoder *encoder; + + encoder = platform_get_drvdata(to_platform_device(dsi->dev)); + dw_mipi_dsi_encoder_disable(encoder); + drm_panel_detach(dsi->panel); + dsi->panel = NULL; + } + + if (dsi->panel) + return connector_status_connected; + + return connector_status_disconnected; }
static void dw_mipi_dsi_drm_connector_destroy(struct drm_connector *connector) { drm_connector_unregister(connector); drm_connector_cleanup(connector); + connector->dev = NULL; }
static struct drm_connector_funcs dw_mipi_dsi_atomic_connector_funcs = { @@ -1069,6 +1092,8 @@ static int dw_mipi_dsi_register(struct drm_device *drm, return ret; }
+ connector->polled = DRM_CONNECTOR_POLL_HPD; + drm_connector_helper_add(connector, &dw_mipi_dsi_connector_helper_funcs);
@@ -1225,6 +1250,8 @@ static void dw_mipi_dsi_unbind(struct device *dev, struct device *master, { struct dw_mipi_dsi *dsi = dev_get_drvdata(dev);
+ dw_mipi_dsi_encoder_disable(&dsi->encoder); + mipi_dsi_host_unregister(&dsi->dsi_host); pm_runtime_disable(dev); clk_disable_unprepare(dsi->pllref_clk);