Winstar TFT Display over SPI on imx 8 mini

[thehardgamer]

Hello, I am trying to get the Winstar WF35XSWACDNN0 display which uses ST7272A driver IC work over SPI on imx 8 mini , as of now I can't seem to find any related kernel drivers on the kirkstone k5.15 branches for the display or the driver IC, can someone point me to the right direction?

[Dhruvit]

Hi @thehardgamer,

I hope you are doing well.

->Winstar WF35XSWACDNN0 display supports a 24-bit RGB interface.

->If one wants to interface it then Please refer to section 13.3 Enhanced LCD Interface (eLCDIF) in the RM.
https://www.nxp.com/webapp/Download?colCode=IMX8MMRM

->One can find the panel(Display Driver) support NXP gives below the given location.
<Linux_src>/drivers/gpu/drm/panel

->If it is an integration problem then please take reference of this link.
https://community.nxp.com/t5/i-MX-Processors/Winstar-LCD-integration-PROBLEM/m-p/1203275

Thanks & Regards,
Dhruvit Vasavada

[thehardgamer]

Hello @Dhruvit , I checked the available drivers in drm/panel, and I don't see any winstar related drivers there, do you have any idea whether the simple/generic drm drivers such as DRM_PANEL_SIMPLE will work the same, and for the interfacing, all that we want to achieve is display frames on the panel over SPI through the processor.

[Dhruvit · Accepted solution]

Hi @thehardgamer,

I hope you are doing well.

For the ST series of drivers there are st7701, st7703, and st7789v driver files are there.
Please check with them.
Location:- <Linux_BSP>/drivers/gpu/drm/panel/

If they are backward compatible with the LCD that one is using then one can define DRM_PANEL_SIMPLE in this module for the support of the drm panel.
Or else one has to port the driver for the same.

->Please check whether the LCD does support the spi interface because in its datasheet it is seen that it works on RGB 24-bit interface.

Thanks & Regards,
Dhruvit Vasavada