Hi, Comment below.
On 09/26/2017 01:25 PM, Nickey Yang wrote:
This patch add dual mipi channel support: 1.add definition of dsi1 register and grf operation. 2.dsi0 and dsi1 will work in master and slave mode when driving dual mipi panel.
<snip>
@@ -1226,6 +1367,13 @@ static int rockchip_mipi_parse_dt(struct dw_mipi_dsi *dsi).grf_switch_reg = RK3399_GRF_SOC_CON20, .grf_dsi0_mode = RK3399_GRF_DSI_MODE, .grf_dsi0_mode_reg = RK3399_GRF_SOC_CON22, + .grf_dsi1_mode = RK3399_GRF_DSI1_MODE, + .grf_dsi1_enable = RK3399_GRF_DSI1_ENABLE, + .grf_dsi1_mode_reg1 = RK3399_GRF_SOC_CON23, + .dsi1_basedir = RK3399_TXRX_BASEDIR, + .dsi1_masterslavez = RK3399_TXRX_MASTERSLAVEZ, + .dsi1_enableclk = RK3399_TXRX_ENABLECLK, + .grf_dsi1_mode_reg2 = RK3399_GRF_SOC_CON24, .flags = DW_MIPI_NEEDS_PHY_CFG_CLK | DW_MIPI_NEEDS_GRF_CLK, .max_data_lanes = 4, }; @@ -1242,17 +1390,107 @@ static int rockchip_mipi_parse_dt(struct dw_mipi_dsi *dsi) }; MODULE_DEVICE_TABLE(of, dw_mipi_dsi_dt_ids);++static int rockchip_dsi_dual_channel_probe(struct dw_mipi_dsi *dsi) +{ + struct device_node *np; + struct platform_device *secondary; + + np = of_parse_phandle(dsi->dev->of_node, "rockchip,dual-channel", 0); + if (np) { + secondary = of_find_device_by_node(np); + dsi->slave = platform_get_drvdata(secondary); + of_node_put(np); + + if (!dsi->slave) + return -EPROBE_DEFER; + + dsi->slave->master = dsi;
This is not a suitable DT binding. It doesn't really represent HW, it's more of a configuration that allows 2 DSIs to work together. You can use the of-graph bindings to figure out whether you are operating in dual mode or not: If the output ports of both the DSIs are connected to the same DT node (i.e, both DSIs driving the same bridge chip/panel), then you know that you need to configure the DSIs in dual channel mode. Thanks, Archit -- Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
