diff options
| -rw-r--r-- | drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c | 80 | ||||
| -rw-r--r-- | include/drm/bridge/dw_mipi_dsi.h | 1 |
2 files changed, 75 insertions, 6 deletions
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c index 3962e5d84e1e..2f4b145b73af 100644 --- a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c +++ b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c @@ -230,10 +230,21 @@ struct dw_mipi_dsi { u32 format; unsigned long mode_flags; + struct dw_mipi_dsi *master; /* dual-dsi master ptr */ + struct dw_mipi_dsi *slave; /* dual-dsi slave ptr */ + const struct dw_mipi_dsi_plat_data *plat_data; }; /* + * Check if either a link to a master or slave is present + */ +static inline bool dw_mipi_is_dual_mode(struct dw_mipi_dsi *dsi) +{ + return dsi->slave || dsi->master; +} + +/* * The controller should generate 2 frames before * preparing the peripheral. */ @@ -456,10 +467,17 @@ static ssize_t dw_mipi_dsi_host_transfer(struct mipi_dsi_host *host, } dw_mipi_message_config(dsi, msg); + if (dsi->slave) + dw_mipi_message_config(dsi->slave, msg); ret = dw_mipi_dsi_write(dsi, &packet); if (ret) return ret; + if (dsi->slave) { + ret = dw_mipi_dsi_write(dsi->slave, &packet); + if (ret) + return ret; + } if (msg->rx_buf && msg->rx_len) { ret = dw_mipi_dsi_read(dsi, msg); @@ -598,7 +616,11 @@ static void dw_mipi_dsi_video_packet_config(struct dw_mipi_dsi *dsi, * DSI_VNPCR.NPSIZE... especially because this driver supports * non-burst video modes, see dw_mipi_dsi_video_mode_config()... */ - dsi_write(dsi, DSI_VID_PKT_SIZE, VID_PKT_SIZE(mode->hdisplay)); + + dsi_write(dsi, DSI_VID_PKT_SIZE, + dw_mipi_is_dual_mode(dsi) ? + VID_PKT_SIZE(mode->hdisplay / 2) : + VID_PKT_SIZE(mode->hdisplay)); } static void dw_mipi_dsi_command_mode_config(struct dw_mipi_dsi *dsi) @@ -770,24 +792,43 @@ static void dw_mipi_dsi_bridge_post_disable(struct drm_bridge *bridge) */ dsi->panel_bridge->funcs->post_disable(dsi->panel_bridge); + if (dsi->slave) { + dw_mipi_dsi_disable(dsi->slave); + clk_disable_unprepare(dsi->slave->pclk); + pm_runtime_put(dsi->slave->dev); + } dw_mipi_dsi_disable(dsi); + clk_disable_unprepare(dsi->pclk); pm_runtime_put(dsi->dev); } -static void dw_mipi_dsi_bridge_mode_set(struct drm_bridge *bridge, - struct drm_display_mode *mode, - struct drm_display_mode *adjusted_mode) +static unsigned int dw_mipi_dsi_get_lanes(struct dw_mipi_dsi *dsi) +{ + /* this instance is the slave, so add the master's lanes */ + if (dsi->master) + return dsi->master->lanes + dsi->lanes; + + /* this instance is the master, so add the slave's lanes */ + if (dsi->slave) + return dsi->lanes + dsi->slave->lanes; + + /* single-dsi, so no other instance to consider */ + return dsi->lanes; +} + +static void dw_mipi_dsi_mode_set(struct dw_mipi_dsi *dsi, + struct drm_display_mode *adjusted_mode) { - struct dw_mipi_dsi *dsi = bridge_to_dsi(bridge); const struct dw_mipi_dsi_phy_ops *phy_ops = dsi->plat_data->phy_ops; void *priv_data = dsi->plat_data->priv_data; int ret; + u32 lanes = dw_mipi_dsi_get_lanes(dsi); clk_prepare_enable(dsi->pclk); ret = phy_ops->get_lane_mbps(priv_data, adjusted_mode, dsi->mode_flags, - dsi->lanes, dsi->format, &dsi->lane_mbps); + lanes, dsi->format, &dsi->lane_mbps); if (ret) DRM_DEBUG_DRIVER("Phy get_lane_mbps() failed\n"); @@ -819,12 +860,25 @@ static void dw_mipi_dsi_bridge_mode_set(struct drm_bridge *bridge, dw_mipi_dsi_set_mode(dsi, 0); } +static void dw_mipi_dsi_bridge_mode_set(struct drm_bridge *bridge, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + struct dw_mipi_dsi *dsi = bridge_to_dsi(bridge); + + dw_mipi_dsi_mode_set(dsi, adjusted_mode); + if (dsi->slave) + dw_mipi_dsi_mode_set(dsi->slave, adjusted_mode); +} + static void dw_mipi_dsi_bridge_enable(struct drm_bridge *bridge) { struct dw_mipi_dsi *dsi = bridge_to_dsi(bridge); /* Switch to video mode for panel-bridge enable & panel enable */ dw_mipi_dsi_set_mode(dsi, MIPI_DSI_MODE_VIDEO); + if (dsi->slave) + dw_mipi_dsi_set_mode(dsi->slave, MIPI_DSI_MODE_VIDEO); } static enum drm_mode_status @@ -961,6 +1015,20 @@ static void __dw_mipi_dsi_remove(struct dw_mipi_dsi *dsi) pm_runtime_disable(dsi->dev); } +void dw_mipi_dsi_set_slave(struct dw_mipi_dsi *dsi, struct dw_mipi_dsi *slave) +{ + /* introduce controllers to each other */ + dsi->slave = slave; + dsi->slave->master = dsi; + + /* migrate settings for already attached displays */ + dsi->slave->lanes = dsi->lanes; + dsi->slave->channel = dsi->channel; + dsi->slave->format = dsi->format; + dsi->slave->mode_flags = dsi->mode_flags; +} +EXPORT_SYMBOL_GPL(dw_mipi_dsi_set_slave); + /* * Probe/remove API, used from platforms based on the DRM bridge API. */ diff --git a/include/drm/bridge/dw_mipi_dsi.h b/include/drm/bridge/dw_mipi_dsi.h index a9c03099cf3e..48a671e782ca 100644 --- a/include/drm/bridge/dw_mipi_dsi.h +++ b/include/drm/bridge/dw_mipi_dsi.h @@ -45,5 +45,6 @@ struct dw_mipi_dsi *dw_mipi_dsi_probe(struct platform_device *pdev, void dw_mipi_dsi_remove(struct dw_mipi_dsi *dsi); int dw_mipi_dsi_bind(struct dw_mipi_dsi *dsi, struct drm_encoder *encoder); void dw_mipi_dsi_unbind(struct dw_mipi_dsi *dsi); +void dw_mipi_dsi_set_slave(struct dw_mipi_dsi *dsi, struct dw_mipi_dsi *slave); #endif /* __DW_MIPI_DSI__ */ |