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Mon, 10 Nov 2025 15:46:20 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id kNVjHswIEmlHXQAAD6G6ig (envelope-from ); Mon, 10 Nov 2025 15:46:20 +0000 From: Thomas Zimmermann To: jfalempe@redhat.com, javierm@redhat.com, francesco@valla.it, rrameshbabu@nvidia.com, simona@ffwll.ch, airlied@gmail.com, mripard@kernel.org, maarten.lankhorst@linux.intel.com, gregkh@linuxfoundation.org, jirislaby@kernel.org Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, Thomas Zimmermann Subject: [PATCH v2 0/3] drm/client: Wire up sysrq for all clients and update drm_log Date: Mon, 10 Nov 2025 16:44:20 +0100 Message-ID: <20251110154616.539328-1-tzimmermann@suse.de> X-Mailer: git-send-email 2.51.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Level: X-Spamd-Result: default: False [-2.80 / 50.00]; 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Wire up sysrq for all DRM clients and make it work with drm_log. Patch 1 and 2 set up DRM client functionality for sysrq. The patches adopt existing conventions from fbdev emulation, so that there's no visible change to users. Invoke SysRq+v to bring up the in-kernel DRM client. Patch 3 adds restore functionality to drm_log. This enables SysRq, but also brings back drm_log when user space releases control of the display. Tested on amdgpu and bochs. v2: - fix placeholder functions - fix grammar in commit descriptions Thomas Zimmermann (3): drm/client: Pass force parameter to client restore drm/client: Support emergency restore via sysrq for all clients drm/client: log: Implement struct drm_client_funcs.restore drivers/gpu/drm/Makefile | 3 +- drivers/gpu/drm/clients/drm_fbdev_client.c | 6 +- drivers/gpu/drm/clients/drm_log.c | 13 ++++ drivers/gpu/drm/drm_client.c | 1 + drivers/gpu/drm/drm_client_event.c | 4 +- drivers/gpu/drm/drm_client_sysrq.c | 65 ++++++++++++++++++++ drivers/gpu/drm/drm_drv.c | 3 + drivers/gpu/drm/drm_fb_helper.c | 69 +++------------------- drivers/gpu/drm/drm_file.c | 2 +- drivers/gpu/drm/drm_internal.h | 11 ++++ include/drm/drm_client.h | 8 ++- include/drm/drm_client_event.h | 4 +- include/drm/drm_device.h | 8 +++ include/drm/drm_fb_helper.h | 8 +-- 14 files changed, 126 insertions(+), 79 deletions(-) create mode 100644 drivers/gpu/drm/drm_client_sysrq.c -- 2.51.1