There is a display controller in loongson's LS2K1000 SoC and LS7A1000 bridge, and the DC in those chip is a pci device. This display controller have two display pipes(CRTC) but with only one hardware cursor. This display controller is uncommon outside of china, it don't have rich document either. This patch try to provided a minial support for this display controller which is for graphic environment bring up. Hope the code could speak for itself. For ls7a1000, there are 4 gpios who register is located at dc register space which is used to emulation i2c. LS2K1000 and LS2K0500 SoC don't have those hardware, they use general purpose gpio or hardware i2c to serve this purpose. LS2K1000 is a double core 1.0Ghz mips64r2 compatible SoC[1]. LS7A1000 is a bridge chip made by Loongson corporation which act as north and/or south bridge of loongson's desktop and server level processor. It is equivalent to RS780E or something like that. More details can be read from its user manual[2]. This bridge chip is typically use with LS3A3000, LS3A4000 and LS3A5000 cpu. LS3A3000 is 4 core 1.45gHz mips64r2 compatible cpu. LS3A4000 is 4 core 1.8gHz mips64r5 compatible cpu. LS3A5000 is 4 core 2.5gHz loongarch cpu[3]. [1] https://wiki.debian.org/InstallingDebianOn/Lemote/Loongson2K1000 [2] https://loongson.github.io/LoongArch-Documentation/Loongson-7A1000-usermanual-EN.html [3] https://loongson.github.io/LoongArch-Documentation/Loongson-3A5000-usermanual-EN.html suijingfeng (1): drm/lsdc: add drm driver for loongson display controller drivers/gpu/drm/Kconfig | 2 + drivers/gpu/drm/Makefile | 1 + drivers/gpu/drm/lsdc/Kconfig | 32 + drivers/gpu/drm/lsdc/Makefile | 15 + drivers/gpu/drm/lsdc/lsdc_connector.c | 440 ++++++++++++++ drivers/gpu/drm/lsdc/lsdc_connector.h | 60 ++ drivers/gpu/drm/lsdc/lsdc_crtc.c | 438 ++++++++++++++ drivers/gpu/drm/lsdc/lsdc_drv.c | 824 ++++++++++++++++++++++++++ drivers/gpu/drm/lsdc/lsdc_drv.h | 212 +++++++ drivers/gpu/drm/lsdc/lsdc_encoder.c | 79 +++ drivers/gpu/drm/lsdc/lsdc_i2c.c | 220 +++++++ drivers/gpu/drm/lsdc/lsdc_i2c.h | 61 ++ drivers/gpu/drm/lsdc/lsdc_irq.c | 77 +++ drivers/gpu/drm/lsdc/lsdc_irq.h | 37 ++ drivers/gpu/drm/lsdc/lsdc_plane.c | 713 ++++++++++++++++++++++ drivers/gpu/drm/lsdc/lsdc_pll.c | 596 +++++++++++++++++++ drivers/gpu/drm/lsdc/lsdc_pll.h | 109 ++++ drivers/gpu/drm/lsdc/lsdc_regs.h | 242 ++++++++ 18 files changed, 4158 insertions(+) create mode 100644 drivers/gpu/drm/lsdc/Kconfig create mode 100644 drivers/gpu/drm/lsdc/Makefile create mode 100644 drivers/gpu/drm/lsdc/lsdc_connector.c create mode 100644 drivers/gpu/drm/lsdc/lsdc_connector.h create mode 100644 drivers/gpu/drm/lsdc/lsdc_crtc.c create mode 100644 drivers/gpu/drm/lsdc/lsdc_drv.c create mode 100644 drivers/gpu/drm/lsdc/lsdc_drv.h create mode 100644 drivers/gpu/drm/lsdc/lsdc_encoder.c create mode 100644 drivers/gpu/drm/lsdc/lsdc_i2c.c create mode 100644 drivers/gpu/drm/lsdc/lsdc_i2c.h create mode 100644 drivers/gpu/drm/lsdc/lsdc_irq.c create mode 100644 drivers/gpu/drm/lsdc/lsdc_irq.h create mode 100644 drivers/gpu/drm/lsdc/lsdc_plane.c create mode 100644 drivers/gpu/drm/lsdc/lsdc_pll.c create mode 100644 drivers/gpu/drm/lsdc/lsdc_pll.h create mode 100644 drivers/gpu/drm/lsdc/lsdc_regs.h -- 2.25.1
