From: "Michael Brown" <mcb30@ipxe.org>
To: Alireza Banejad <alibanejad1376@gmail.com>
Cc: devel@edk2.groups.io, "Paul, Bill" <Bill.Paul@windriver.com>
Subject: Re: [edk2-devel] Graphic Output on qemu
Date: Wed, 8 Feb 2023 10:00:05 +0000 [thread overview]
Message-ID: <010201863077d480-16faa10f-e35c-4324-bdd1-1eb7e6c3feb3-000000@eu-west-1.amazonses.com> (raw)
In-Reply-To: <CADH3hnKd9+xD36B3+iOsZX+jP+wE0WS14SjvJsrJCae-+9ifvA@mail.gmail.com>
On 08/02/2023 09:55, Alireza Banejad wrote:
> As my previous email, I mentioned that I am able to find the protocol
> since the LocateProtocol returns 0 (EFI_SUCCESS) (using the exact code
> you wrote) . But when I want to open it either with OpenProtocol or
> HandleProtocol I get a RETURN_UNSUPPORTED. Are you implying that by
> calling LocateProtocol() the protocol would also be opened?
LocateProtocol() gives you back a pointer to the protocol instance.
There is no need for a separate "open" action: you can just immediately
use the protocol instance that LocateProtocol() returns to you.
Michael
prev parent reply other threads:[~2023-02-08 10:00 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-07 10:22 Graphic Output on qemu Alireza Banejad
2023-02-07 19:55 ` [edk2-devel] " Paul, Bill
2023-02-08 8:03 ` Alireza Banejad
2023-02-08 9:06 ` Michael Brown
2023-02-08 9:55 ` Alireza Banejad
2023-02-08 10:00 ` Michael Brown [this message]
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