Hi-- On 1/29/22 22:04, Sui Jingfeng wrote: > diff --git a/drivers/gpu/drm/lsdc/Kconfig b/drivers/gpu/drm/lsdc/Kconfig > new file mode 100644 > index 000000000000..f470892ddf60 > --- /dev/null > +++ b/drivers/gpu/drm/lsdc/Kconfig > @@ -0,0 +1,38 @@ > +config DRM_LSDC > + tristate "DRM Support for loongson's display controller" > + depends on DRM && PCI > + depends on MACH_LOONGSON64 || LOONGARCH || MIPS || COMPILE_TEST > + select OF > + select CMA if HAVE_DMA_CONTIGUOUS > + select DMA_CMA if HAVE_DMA_CONTIGUOUS > + select DRM_KMS_HELPER > + select DRM_KMS_FB_HELPER > + select DRM_GEM_CMA_HELPER > + select VIDEOMODE_HELPERS > + select BACKLIGHT_PWM if CPU_LOONGSON2K > + select I2C_GPIO if CPU_LOONGSON2K > + select I2C_LS2X if CPU_LOONGSON2K > + default m > + help > + This is a KMS driver for the display controller in the LS7A1000 > + bridge chip and LS2K1000 SoC. The display controller have two has two > + display pipes and it is a PCI device. > + When using this driver on LS2K1000/LS2K0500 SoC, its framebuffer > + is located at system memory. > + If "M" is selected, the module will be called lsdc. > + > + If in doubt, say "Y". > + > +config DRM_LSDC_VRAM_DRIVER > + bool "vram helper based device driver support" > + depends on DRM_LSDC > + select DRM_VRAM_HELPER > + default y > + help > + When using this driver on LS7A1000 + LS3A3000/LS3A4000/LS3A5000 > + platform, the LS7A1000 bridge chip have dedicated video RAM. has > + Pass lsdc.use_vram_helper = 1 to the kernel cmd line will enable Using "lsdc.use_vram_helper=1" in the kernel command line will enable (No spaces allowed in the kernel command line.) > + this driver mode and then the framebuffer will located at the > + VRAM at the price of losing PRIME support. -- ~Randy
