Re: [PATCH v1 2/4] arm64: dts: qcom: sc7280: add display dt nodes
From: mkrishn
Date: Tue Oct 05 2021 - 05:53:02 EST
On 2021-10-05 07:21, Stephen Boyd wrote:
Quoting mkrishn@xxxxxxxxxxxxxx (2021-09-30 23:39:07)
On 2021-09-30 23:28, Stephen Boyd wrote:
> Quoting mkrishn@xxxxxxxxxxxxxx (2021-09-30 04:56:59)
>> On 2021-08-19 01:27, Stephen Boyd wrote:
>> > Quoting Krishna Manikandan (2021-08-18 03:27:02)
>> >> diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi
>> >> b/arch/arm64/boot/dts/qcom/sc7280.dtsi
>> >> index 53a21d0..fd7ff1c 100644
>> >> --- a/arch/arm64/boot/dts/qcom/sc7280.dtsi
>> >> +++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi
>> >> +
>> >> + status = "disabled";
>> >> +
>> >> + mdp: mdp@ae01000 {
>> >
>> > display-controller@ae01000
>>
>> Stephen,
>> In the current driver code, there is a substring comparison for
>> "mdp"
>> in device node name as part of probe sequence. If "mdp" is not present
>> in the node name, it will
>> return an error resulting in probe failure. Can we continue using
>> mdp
>> as nodename instead of display controller?
>>
>
> Can we fix the driver to not look for node names and look for
> compatible
> strings instead? It took me a minute to find compare_name_mdp() in
> drivers/gpu/drm/msm/msm_drv.c to understand what you're talking about.
> Perhaps looking for qcom,mdp5 in there will be sufficient instead of
> looking at the node name.
Sure Stephen. I will make the necessary changes in msm_drv.c to look
for
compatible string instead of node name.
Can I include these two changes (changing mdp--> display controller
and
msm_drv.c changes) in a separate series ?
Sure. So you'll send the drm driver change now and we'll get the DT
change after that with the more generic node name?
Yes Stephen.I have raised the change to fix the driver issue.
https://patchwork.kernel.org/project/linux-arm-msm/patch/1633427071-19523-1-git-send-email-mkrishn@xxxxxxxxxxxxxx/
Regards,
Krishna