From: suijingfeng suijingfeng@loongson.cn
The display controller is a pci device, it is used in ls2k1000 SoC and LS7A1000 bridge. Its PCI vendor id is 0x0014, Tts PCI device id is 0x7a06. In order to let the driver to know which chip the DC is contained in, the compatible of the display controller is named according to the chip's name.
For LS7A1000, there are 4 dedicated GPIOs whose control register is located at the DC register space. They are used to emulate i2c for reading edid from the monitor. One for DVO0, another for DVO1.
LS2K1000 and LS2K0500 SoC don't have such GPIOs, they grab i2c adapter from other module, either general purpose GPIO emulated i2c or hardware i2c adapter.
Signed-off-by: suijingfeng suijingfeng@loongson.cn Signed-off-by: Sui Jingfeng 15330273260@189.cn --- .../boot/dts/loongson/loongson64-2k1000.dtsi | 24 +++++++++++++ arch/mips/boot/dts/loongson/ls7a-pch.dtsi | 36 ++++++++++++++++--- 2 files changed, 55 insertions(+), 5 deletions(-)
diff --git a/arch/mips/boot/dts/loongson/loongson64-2k1000.dtsi b/arch/mips/boot/dts/loongson/loongson64-2k1000.dtsi index 8143a61111e3..b168cccc3399 100644 --- a/arch/mips/boot/dts/loongson/loongson64-2k1000.dtsi +++ b/arch/mips/boot/dts/loongson/loongson64-2k1000.dtsi @@ -198,6 +198,30 @@ sata@8,0 { interrupt-parent = <&liointc0>; };
+ lsdc: display-controller@6,0 { + compatible = "loongson,ls2k1000-dc"; + + reg = <0x3000 0x0 0x0 0x0 0x0>; + interrupts = <28 IRQ_TYPE_LEVEL_LOW>; + interrupt-parent = <&liointc0>; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + port@0 { + reg = <0>; + dc_out_rgb0: endpoint { + }; + }; + port@1 { + reg = <1>; + dc_out_rgb1: endpoint { + }; + }; + }; + }; + pci_bridge@9,0 { compatible = "pci0014,7a19.0", "pci0014,7a19", diff --git a/arch/mips/boot/dts/loongson/ls7a-pch.dtsi b/arch/mips/boot/dts/loongson/ls7a-pch.dtsi index 2f45fce2cdc4..fcea73006f7a 100644 --- a/arch/mips/boot/dts/loongson/ls7a-pch.dtsi +++ b/arch/mips/boot/dts/loongson/ls7a-pch.dtsi @@ -160,15 +160,41 @@ gpu@6,0 { interrupt-parent = <&pic>; };
- dc@6,1 { - compatible = "pci0014,7a06.0", - "pci0014,7a06", - "pciclass030000", - "pciclass0300"; + lsdc: display-controller@6,1 { + compatible = "loongson,ls7a1000-dc";
reg = <0x3100 0x0 0x0 0x0 0x0>; interrupts = <28 IRQ_TYPE_LEVEL_HIGH>; interrupt-parent = <&pic>; + + #address-cells = <1>; + #size-cells = <0>; + + i2c6: i2c-gpio@0 { + compatible = "lsdc,i2c-gpio-0"; + reg = <6>; + }; + + i2c7: i2c-gpio@1 { + compatible = "lsdc,i2c-gpio-1"; + reg = <7>; + }; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + port@0 { + reg = <0>; + dc_out_rgb0: endpoint { + }; + }; + port@1 { + reg = <1>; + dc_out_rgb1: endpoint { + }; + }; + }; };
hda@7,0 {