linux-kernel - Re: [PATCH 1/2] Mips: ls2k1000: dts: add the display controller device node

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Date:   Thu, 23 Feb 2023 17:17:26 +0800
From:   suijingfeng <suijingfeng@...ngson.cn>
To:     Krzysztof Kozlowski <krzk@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Cc:     linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH 1/2] Mips: ls2k1000: dts: add the display controller
 device node


On 2023/2/23 16:59, Krzysztof Kozlowski wrote:
> On 23/02/2023 09:40, suijingfeng wrote:
>> On 2023/2/23 15:58, Krzysztof Kozlowski wrote:
>>> On 23/02/2023 04:19, Sui jingfeng wrote:
>>>> Hi,
>>>>
>>>> On 2023/2/23 02:32, Krzysztof Kozlowski wrote:
>>>>> On 22/02/2023 17:55, suijingfeng wrote:
>>>>>> The display controller is a pci device, it's pci vendor id is
>>>>>> 0x0014, it's pci device id is 0x7a06.
>>>>>>
>>>>>> Signed-off-by: suijingfeng <suijingfeng@...ngson.cn>
>>>>>> ---
>>>>>>     .../boot/dts/loongson/loongson64-2k1000.dtsi  | 21 +++++++++++++++++++
>>>>>>     1 file changed, 21 insertions(+)
>>>>>>
>>>>>> diff --git a/arch/mips/boot/dts/loongson/loongson64-2k1000.dtsi b/arch/mips/boot/dts/loongson/loongson64-2k1000.dtsi
>>>>>> index 8143a61111e3..a528af3977d9 100644
>>>>>> --- a/arch/mips/boot/dts/loongson/loongson64-2k1000.dtsi
>>>>>> +++ b/arch/mips/boot/dts/loongson/loongson64-2k1000.dtsi
>>>>>> @@ -31,6 +31,18 @@ memory@...000 {
>>>>>>     			<0x00000001 0x10000000 0x00000001 0xb0000000>; /* 6912 MB at 4352MB */
>>>>>>     	};
>>>>>>     
>>>>>> +	reserved-memory {
>>>>>> +		#address-cells = <2>;
>>>>>> +		#size-cells = <2>;
>>>>>> +		ranges;
>>>>>> +
>>>>>> +		display_reserved: framebuffer@...00000 {
>>>>>> +			compatible = "shared-dma-pool";
>>>>>> +			reg = <0x0 0x30000000 0x0 0x04000000>; /* 64M */
>>>>>> +			linux,cma-default;
>>>>>> +		};
>>>>>> +	};
>>>>>> +
>>>>>>     	cpu_clk: cpu_clk {
>>>>>>     		#clock-cells = <0>;
>>>>>>     		compatible = "fixed-clock";
>>>>>> @@ -198,6 +210,15 @@ sata@8,0 {
>>>>>>     				interrupt-parent = <&liointc0>;
>>>>>>     			};
>>>>>>     
>>>>>> +			display-controller@6,0 {
>>>>>> +				compatible = "loongson,ls2k1000-dc";
>>>>>> +
>>>>>> +				reg = <0x3000 0x0 0x0 0x0 0x0>;
>>>>>> +				interrupts = <28 IRQ_TYPE_LEVEL_LOW>;
>>>>>> +				interrupt-parent = <&liointc0>;
>>>>>> +				memory-region = <&display_reserved>;
>>>>> NAK.
>>>> Err :(,  please give me a chance to explain
>>>>> Test your code against the bindings you send.
>>>> I can guarantee to you that I test may code more than twice. The code
>>>> used to testing is listed at link [1].
>>> I wrote - test against the bindings. I don't believe that it was tested.
>>> Please paste the output of the testing (dtbs_check).
>                                            ^^^^^^^^^^^^
> Do you see this                       ----------^^^^?
>
> But you pasted:
>
>> I *do* run the test against the bindings and the test result say nothing.
>>
>> I reset my modify today made, then re-run the test again.
>>
>> I'm telling the truth: the test result say nothing. I paste the log at
>> below:
>>
>> make -j$(nproc) ARCH=loongarch
>> CROSS_COMPILE=loongarch64-unknown-linux-gnu- dt_binding_check
> This -------------------------------------------^^^^^^^^^^^^

Yes, I see it.

I means I have tested all of them as the instruction[1]!

the test log just say nothing.  I re-run it again and all passed.


[1] 
https://www.kernel.org/doc/html/v5.9/devicetree/writing-schema.html#:~:text=The%20DT%20schema%20project%20can%20be%20installed%20with,they%20are%20in%20your%20PATH%20%28~%2F.local%2Fbin%20by%20default%29.

>
> Best regards,
> Krzysztof