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Wed, 02 Apr 2025 01:44:12 -0700 (PDT) X-Google-Smtp-Source: AGHT+IF6cYnX2gSNL4YcbMp3FSSrc8XCOSZrJOBdqY+cHTmSYJDx7efPUiNv5+ClDhwWFeSdIiQTdQ== X-Received: by 2002:a17:902:d2cc:b0:21f:2ded:76ea with SMTP id d9443c01a7336-2292f9d4e12mr213521185ad.36.1743583452281; Wed, 02 Apr 2025 01:44:12 -0700 (PDT) Received: from zeus.elecom ([240b:10:83a2:bd00:6e35:f2f5:2e21:ae3a]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2291f1f7394sm102202645ad.225.2025.04.02.01.44.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 02 Apr 2025 01:44:11 -0700 (PDT) From: Ryosuke Yasuoka To: maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, simona@ffwll.ch, drawat.floss@gmail.com, jfalempe@redhat.com Cc: Ryosuke Yasuoka , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org Subject: [PATCH RFC drm-next 0/1] Add support for drm_panic Date: Wed, 2 Apr 2025 17:43:48 +0900 Message-ID: <20250402084351.1545536-1-ryasuoka@redhat.com> X-Mailer: git-send-email 2.48.1 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. Ryosuke Yasuoka (1): drm/hyperv: Add support for drm_panic drivers/gpu/drm/drm_simple_kms_helper.c | 26 +++++++++++++ drivers/gpu/drm/hyperv/hyperv_drm_modeset.c | 42 +++++++++++++++++++++ include/drm/drm_simple_kms_helper.h | 22 +++++++++++ 3 files changed, 90 insertions(+) base-commit: cf05922d63e2ae6a9b1b52ff5236a44c3b29f78c -- 2.48.1