[Freedreno] [PATCH] drm/msm: Do not run snapshot on non-DPU devices

[abhinavk at codeaurora.org]

Hi Fabio

Ah, I did not realize that amd compatible is present in the list and its 
quite a surprise.

/*
  * We don't know what's the best binding to link the gpu with the drm 
device.
  * Fow now, we just hunt for all the possible gpus that we support, and 
add them
  * as components.
  */
static const struct of_device_id msm_gpu_match[] = {
	{ .compatible = "qcom,adreno" },
	{ .compatible = "qcom,adreno-3xx" },
	{ .compatible = "amd,imageon" },
	{ .compatible = "qcom,kgsl-3d0" },
	{ },
};

https://github.com/torvalds/linux/commit/e6f6d63ed14c20528aa6df05a8f0707c183c6ba3

For this change itself,
Reviewed-by: Abhinav Kumar <abhinavk at codeaurora.org>

On 2021-09-16 09:24, Fabio Estevam wrote:
> Hi Abhinav,
> 
> On Thu, Sep 16, 2021 at 1:15 PM <abhinavk at codeaurora.org> wrote:
>> 
>> Hi Fabio
>> 
>> Thanks for confirming.
>> 
>> Although I have no issues with your change, I am curious why even msm 
>> is
>> probing and/or binding.
>> Your device tree should not be having any mdp/dpu nodes then.
> 
> The i.MX53 does have the following GPU node:
> 
> compatible = "amd,imageon-200.0", "amd,imageon";
> 
> That's why it probes the msm driver.
> 
> However, i.MX53 does not have any of the Qualcomm display controllers.
> 
> It uses the i.MX IPU display controller instead.
> 
> Hope that clarifies.
> 
> Please reply with a Reviewed-by if you are happy with my fix.
> 
> Thanks