Hello,
I have a question about porting MIPI DSI panel driver (sitronix,st7701) from Linux to U-Boot (I'm using custom board
with embedded rk3566 SoM.
I think I'm mostly done, though I had to apply Dang Huynh VOP2 patches (sent to
mailing list on Thu Jan 16)
to get anything probed (dw-mipi-dsi-rockchip, dw_mipi_dsi, panel itself).
I don't see any errors in debug output, I made sure that init function in panel
driver is called,
'dm tree' shows that required drivers were probed and backlight is on
video 0 [ + ] rk3568_vop |-- vop@fe040000
vidconsole 0 [ + ] vidconsole0 | `-- vop@fe040000.vidconsole0
video_brid 0 [ + ] dw-mipi-dsi-rockchip |-- dsi@fe060000
dsi_host 0 [ + ] dw_mipi_dsi | |-- dsihost
panel 0 [ + ] sitronix_st7701 | `-- panel@0
but I don't have any output on display (just black screen).
I know that connection is OK as I can send commands e.g. ALLPON (All Pixel ON) to turn all pixels white but I'm kinda
stuck how to debug why I see nothing on display. Could anyone direct me how can I debug this further?
Could maybe lack of rockchip,rk3568-iommu (vop_mmu node) drivers be a problem?
Maybe I need to modify device-tree
related to display to work with U-Boot?
Best regards,
Michał Iwanicki
