i need output 1080p30 by dsi from imx8ulp, my dts configure is
&dsi {
status = "okay";
panel@0 {
compatible = "hetos,mipi7";
reg = <0>;
port {
panel_in: endpoint {
remote-endpoint = <&mipi_dsi_out>;
};
};
};
ports {
port@1 {
reg = <1>;
mipi_dsi_out: endpoint {
remote-endpoint = <&panel_in>;
};
};
};
};
in fact i do something in drivers/gpu/drm/panel/panel-simple.c
static const struct drm_display_mode hetos_mipi7_mode = {
.clock = 74250,
.hdisplay = 1920,
.hsync_start = 2008,
.hsync_end = 2052,
.htotal = 2200,
.vdisplay = 1080,
.vsync_start = 1084,
.vsync_end = 1089,
.vtotal = 1125,
};
static const struct panel_desc_dsi hetos_mipi7 = {
.desc = {
.modes = &hetos_mipi7_mode,
.num_modes = 1,
.bpc = 8,
.size = {
.width = 170,
.height = 110,
},
.bus_format = MEDIA_BUS_FMT_RGB888_1X24,
.connector_type = DRM_MODE_CONNECTOR_DPI,
},
.flags = MIPI_DSI_CLOCK_NON_CONTINUOUS | MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE | MIPI_DSI_MODE_LPM,
.format = MIPI_DSI_FMT_RGB888,
.lanes = 4,
};
but i find it can't work well in my bridge，at the same time it can work well in imx8mm,
i compare imx8ulp with imx8mm in the same configure, i find the waveform is different
imx8mm waveform
imx8ulp waveform
i want to now why?
Hello,
The DSI in i.MX8ULP can't support 1080p30.
The supported resolution are here:
Best Regards,
Zhiming
