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Mon, 26 May 2025 02:01:49 -0700 (PDT) X-Google-Smtp-Source: AGHT+IEg0OYyfVBPgdKD2DLb50UwcWBJCWgjQ/A2N0sS7L7e5vajyw7pe8MKb0ud18NgI98tWZxDgQ== X-Received: by 2002:a05:6a21:3390:b0:1f5:8cf7:de4b with SMTP id adf61e73a8af0-2188b6edb8amr12702050637.16.1748250109169; Mon, 26 May 2025 02:01:49 -0700 (PDT) Received: from zeus.elecom ([240b:10:83a2:bd00:6e35:f2f5:2e21:ae3a]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-742a9878b53sm16575092b3a.152.2025.05.26.02.01.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 26 May 2025 02:01:48 -0700 (PDT) From: Ryosuke Yasuoka To: drawat.floss@gmail.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, simona@ffwll.ch, jfalempe@redhat.com Cc: Ryosuke Yasuoka , linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org Subject: [PATCH RFC drm-misc-next v2 0/1] Add support for drm_panic Date: Mon, 26 May 2025 18:01:04 +0900 Message-ID: <20250526090117.80593-1-ryasuoka@redhat.com> X-Mailer: git-send-email 2.49.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit This patch adds drm_panic support for hyperv-drm driver. This function works but it's still needed to brush up. Let me hear your opinions. Once kernel panic occurs we expect to see a panic screen. However, to see the screen, I need to close/re-open the graphic console client window. As the panic screen shows correctly in the small preview window in Hyper-V manager and debugfs API for drm_panic works correctly, I think kernel needs to send signal to Hyper-V host that the console client refreshes, but I have no idea what kind of signal is needed. This patch is tested on Hyper-V 2022. v2: - Re-write codes with regular atomic helper. The driver was implemented with simple KMS. So replace it with regular atomic helper in [1], implement this feature on it. [1] https://lore.kernel.org/all/20250427101825.812766-1-ryasuoka@redhat.com/ v1: https://lore.kernel.org/lkml/20250402084351.1545536-1-ryasuoka@redhat.com/ Ryosuke Yasuoka (1): drm/hyperv: Add support for drm_panic drivers/gpu/drm/hyperv/hyperv_drm_modeset.c | 36 +++++++++++++++++++++ 1 file changed, 36 insertions(+) base-commit: c06cb85ad1412c6ff34792b028b2f89495761398 -- 2.49.0