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[2001:8b0:1d0::2]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4282bba283fsm25201295e9.46.2024.07.31.08.41.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 31 Jul 2024 08:41:37 -0700 (PDT) From: Peter Maydell To: qemu-devel@nongnu.org Cc: "Michael S. Tsirkin" , Paolo Bonzini , =?utf-8?q?Marc-Andr=C3=A9_Lureau?= Subject: [PATCH 0/3] virtio-gpu-gl: Improve OpenGL and related display error messages Date: Wed, 31 Jul 2024 16:41:33 +0100 Message-Id: <20240731154136.3494621-1-peter.maydell@linaro.org> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Received-SPF: pass client-ip=2a00:1450:4864:20::329; envelope-from=peter.maydell@linaro.org; helo=mail-wm1-x329.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org If you try to use the virtio-gpu-gl device, the error messages we produce are not very specific, which can leave users confused about what they need to do (see the issue https://gitlab.com/qemu-project/qemu/-/issues/2443 for an example). This patchset tries to improve those errors: (1) Trying to use virtio-gpu-gl without enabling GL on the display backend: $ qemu-system-aarch64 -M virt -device virtio-gpu-gl Currently we say qemu-system-aarch64: -device virtio-gpu-gl: opengl is not available With these patches we will say qemu-system-aarch64: -device virtio-gpu-gl: The display backend does not have OpenGL support enabled It can be enabled with '-display BACKEND,gl=on' where BACKEND is the name of the display backend to use. (2) Trying to enable GL on a backend that doesn't support it: $ qemu-system-aarch64 -M virt -device virtio-gpu-gl -display curses,gl=on Currently we say qemu-system-aarch64: OpenGL is not supported by the display With these patches we will say qemu-system-aarch64: OpenGL is not supported by display backend 'curses' (3) Trying to enable GL when the QEMU binary wasn't built with it: Currently we say qemu-system-aarch64: OpenGL support is disabled With these patches we will say qemu-system-aarch64: OpenGL support was disabled when QEMU was compiled (4) -display help doesn't mention that display types can have suboptions Currently -display help just prints the list of backends. With these patches we will also say Some display backends support suboptions, which can be set with -display backend,option=value,option=value... For a short list of the suboptions for each display, see the top-level -help output; more detail is in the documentation. (The ideal for that last would be to be like -device and let you say "-display gtk,help", but that doesn't work.) Peter Maydell (3): hw/display/virtio-gpu: Improve "opengl is not available" error message system/vl.c: Expand OpenGL related errors ui/console: Note in '-display help' that some backends support suboptions hw/display/virtio-gpu-gl.c | 8 +++++++- system/vl.c | 5 +++-- ui/console.c | 5 +++++ 3 files changed, 15 insertions(+), 3 deletions(-) Acked-by: Marc-André Lureau