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boundary="------------X0uRUHYxl8hDUTwl6kYsqvG4"; protected-headers="v1" From: Maxime Devos To: Reza Alizadeh Majd , 57070@debbugs.gnu.org Cc: Mathieu Othacehe Message-ID: <2ea79bba-ad84-56ad-e907-61481401ac6d@telenet.be> Subject: Re: [bug#57070] [PATCH] bootloader: extlinux: support for optional FDTDIR References: <20220809145730.435ef8d0@pantherx.org> <59ee7050-d5b1-695a-4be4-c1f1856fbda7@telenet.be> <20220816213835.3e0dd301@pantherx.org> In-Reply-To: <20220816213835.3e0dd301@pantherx.org> --------------X0uRUHYxl8hDUTwl6kYsqvG4 Content-Type: multipart/mixed; boundary="------------00XbY6bvreRvagddtQnCyvKg" --------------00XbY6bvreRvagddtQnCyvKg Content-Type: multipart/alternative; boundary="------------UrD707Lb0oKzLpLXPopciZ01" --------------UrD707Lb0oKzLpLXPopciZ01 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: base64 DQpPbiAxNi0wOC0yMDIyIDE5OjA4LCBSZXphIEFsaXphZGVoIE1hamQgd3JvdGU6DQo+PiBD YW4gRkRURElSIGJlIHNldCBhdXRvbWF0aWNhbGx5IG9yIHVuc2V0IGF1dG9tYXRpY2FsbHkg ZGVwZW5kaW5nIG9uDQo+PiB0aGUgaGFyZHdhcmU/IFRoYXQgd291bGQgcmVkdWNlIHRoZSBy ZXF1aXJlZCBjb25maWd1cmF0aW9uDQo+IE5vLCB0aGF0J3Mgbm90IHBvc3NpYmxlLiBBcyBJ IG1lbnRpb25lZCBpbiB0aGUgaW5pdGlhbCBtZXNzYWdlLCBzb21lDQo+IGhhcmR3YXJlIG1h eSBvciBtYXkgbm90IHJlcXVpcmUgaXQgZGVwZW5kaW5nIG9uIHRoZSBrZXJuZWwuDQoNCk15 IHF1ZXN0aW9uIGhhcyBhIHBhcnQgJ2RlcGVuZGluZyBvbiB0aGUgaGFyZHdhcmUnLCBzbyBw b3NzaWJseSB0aGUgDQpyZWxldmFudCBjb2RlIGNvdWxkIGNoZWNrIHdoYXQgdGhlIGhhcmR3 YXJlIGlzLsKgIExpa2V3aXNlLCB0aGUgY29kZSANCmNvdWxkIGNoZWNrIHRoZSBrZXJuZWwg dmVyc2lvbi7CoCBNb3JlIGdlbmVyYWxseSwgd2hlbiBzb21ldGhpbmcgY2FuIGJlIA0KZGVj aWRlZCBtYW51YWxseSwgaXQgY2FuIG9mdGVuIGJlIGRldGVjdGVkIGF1dG9tYXRpY2FsbHkg d2l0aCBzb21lIA0Kd29yay7CoCBJJ20gbm90IHNlZWluZyBhbnkgaW1wb3NzaWJpbGl0eSBo ZXJlLg0KDQpBbHNvLCBhZ2Fpbiwgd2h5IGFyZSB5b3Ugc3VibWl0dGluZyB0aGlzIHdvcmst YXJvdW5kIHdoZW4gaXQgYXBwZWFycyB0byANCmJlIHNpbXBseSBhIGtlcm5lbCBidWcgdGhh dCBuZWVkcyBhIGtlcm5lbCBwYWNrYWdlIHRvIGJlIHVwZGF0ZWQgYW5kIA0KbWF5YmUgYSBk ZXZpY2V0cmVlIGZpeCB0byBiZSBiYWNrcG9ydGVkPyBBcyB3cml0dGVuIGluIGEgcHJldmlv dXMgcmVzcG9uc2U6DQoNCj4g4oCYVGhlcmUgaXMgYWxzbyBubyByZWxpYWJsZSB3YXkgdG8g Z3Vlc3MgaWYgdS1ib290IGJvb3Rsb2FkZXIgc2hvdWxkIGxvYWQNCj4gZGV2aWNlIHRyZWUg b3Igbm90IG9uIGEgc3BlY2lmaWMgaGFyZHdhcmUuIGluIGFkZGl0aW9uLCB0aGVyZSBhcmUN Cj4gaGFyZHdhcmUgdGhhdCBjYW4gYmUgYm9vdGVkIHdpdGggYm90aCBmaXJtd2FyZSBkZXZp Y2UgdHJlZSBvbiBzb21lDQo+IGtlcm5lbHMgYW5kIHdpdGggc3BlY2lhbCBkZXZpY2UgdHJl ZSBvbiBvdGhlciAobW9kaWZpZWQpIGtlcm5lbHMu4oCZDQo+DQo+IElmIEknbSBndWVzc2lu ZyBjb3JyZWN0bHksIHRoYXQgc291bmRzIGxpa2UgdGhlIHByb2JsZW0gaXMgdGhhdCBkZXZp Y2UgDQo+IHRyZWUgaW5mb3JtYXRpb24gaXMgbWlzc2luZyBmcm9tIHRoZSBrZXJuZWwuIFBy b3Bvc2FsOiB1cHN0cmVhbSB0aGUgDQo+IGRldmljZSB0cmVlIGluZm9ybWF0aW9uLg0KDQpH cmVldGluZ3MsDQpNYXhpbWUuDQoNCg== --------------UrD707Lb0oKzLpLXPopciZ01 Content-Type: text/html; 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On 16-08-2022 19:08, Reza Alizadeh Maj= d wrote:
Can FDTDIR be set automati=
cally or unset automatically depending on
the hardware? That would reduce the required configuration

No, that's not possible. As =
I mentioned in the initial message, some
hardware may or may not require it depending on the kernel.

My question has a part 'depending on the hardware', so possibly the relevant code could check what the hardware is.=C2=A0 Likewise,= the code could check the kernel version.=C2=A0 More generally, when something can be decided manually, it can often be detected automatically with some work.=C2=A0 I'm not seeing any impossibilit= y here.

Also, again, why are you submitting this work-around when it appears to be simply a kernel bug that needs a kernel package to be updated and maybe a devicetree fix to be backported? As written in a previous response:

=E2=80=98There is also no =
reliable way to guess if u-boot bootloader should load
device tree or not on a specific hardware. in addition, there are
hardware that can be booted with both firmware device tree on some
kernels and with special device tree on other (modified) kernels.=E2=80=99=
If I'm guessing correctly, that sounds like the problem is that device tree information is missing from the kernel. Proposal: upstream the device tree information.

Greetings,
Maxime.

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