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Mon, 26 Jan 2026 11:43:42 -0800 (PST) From: "Ionut Nechita (Sunlight Linux)" To: christian.koenig@amd.com Cc: alexander.deucher@amd.com, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, ionut_n2001@yahoo.com, linux-kernel@vger.kernel.org, sunlightlinux@gmail.com, superm1@kernel.org Subject: Re: [PATCH 1/1] drm/amdgpu: Fix TLB flush failures after hibernation resume Date: Mon, 26 Jan 2026 21:40:48 +0200 Message-ID: <20260126194057.7376-2-sunlightlinux@gmail.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <77fa0344-3507-420e-9d77-d454ace55cfd@amd.com> References: <20260106125929.25214-6-sunlightlinux@gmail.com> <77fa0344-3507-420e-9d77-d454ace55cfd@amd.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Ionut Nechita On Thu, Jan 8 2026 at 13:36, Christian König wrote: > Question is why the KIQ is not up and running before we do anything with it? Thank you for the feedback. I completely understand that my patch is just a workaround and not proper engineering - you're absolutely right that the real issue is KIQ being marked as ready before it's actually functional. I don't have experience with GPU drivers and video subsystems, so I'm not familiar with the proper initialization sequence for KIQ. I'd prefer not to keep a workaround for this issue in my tree. Is there a proper fix available, or could you point me in the right direction? I'm happy to test any patches on my AMD Cezanne (Renoir) hardware where I can reliably reproduce the issue after hibernation. Also, regarding hibernation support: you mentioned that hibernation is not generally supported with the driver. Should I expect other issues beyond this TLB flush problem, or is this the main blocker? Thanks for your time, Ionut