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Tue, 7 Jul 2026 13:57:29 +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 1EnlBMkFTWoFSgAAD6G6ig (envelope-from ); Tue, 07 Jul 2026 13:57:29 +0000 From: Thomas Zimmermann To: lukas@wunner.de, jfalempe@redhat.com, alexander.deucher@amd.com, christian.koenig@amd.com, airlied@gmail.com, simona@ffwll.ch, maarten.lankhorst@linux.intel.com, mripard@kernel.org, jani.nikula@linux.intel.com, joonas.lahtinen@linux.intel.com, rodrigo.vivi@intel.com, tursulin@ursulin.net, lyude@redhat.com, dakr@kernel.org, deller@gmx.de Cc: dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, nouveau@lists.freedesktop.org, linux-fbdev@vger.kernel.org, sashiko-reviews@lists.linux.dev, Thomas Zimmermann Subject: [PATCH 00/10] vga_switcheroo, drm: Push fbcon handling into DRM clients Date: Tue, 7 Jul 2026 15:38:07 +0200 Message-ID: <20260707135724.247562-1-tzimmermann@suse.de> X-Mailer: git-send-email 2.54.0 Precedence: bulk X-Mailing-List: linux-fbdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Action: no action X-Rspamd-Queue-Id: 9DF37726F2 X-Spam-Flag: NO X-Spam-Score: -3.01 X-Spam-Level: X-Spamd-Result: default: False [-3.01 / 50.00]; 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TO_DN_SOME(0.00)[]; FREEMAIL_ENVRCPT(0.00)[gmail.com,gmx.de] X-Rspamd-Server: rspamd1.dmz-prg2.suse.org Vga_switcheroo currently invokes fb_switch_outputs() to inform fbcon about switching of the physical outputs among framebuffer devices. But new DRM clients to not use fbdev/fbcon and might require their own vga_switcheroo support. Let's strictly separate them from each other. Remove fbdev/fbcon from vga_switcheroo. Introduce a pre_switch callback for vga_switcheroo clients to do the fbcon update. Allows for removing all direct interactions between vga_switcheroo and fbdev/fbcon. Also replace the existing reprobe hook with post_switch for symetry. At the same time, push the fbcon update into DRM's client for fbdev emulation. Do this with the new DRM client callback acquire_outputs, so that other clients can have their own handling of vga_switcheroo. There are only four drivers that support vga_switcheroo: amdgpu, radeon, i915 and nouveau. Update each of them with the new callbacks. When vga_switcheroo now invokes pre_switch, each DRM driver forwards to aquire_outputs and lets the DRM clients handle the new outputs. Tested with radeon on a notebook with Radeon HD 4225 and HD 5430. Thomas Zimmermann (10): drm/edid: Include drm/client: Add acquire_outputs callback; implement for fbdev emulation vga_switcheroo: Add pre_switch callback to client ops vga_switcheroo: Add post_switch callback to client ops drm/amdgpu: Implement struct vga_switcheroo_client_ops.pre_switch drm/i915: Implement vga_switcheroo_client_ops.pre_switch drm/nouveau: Implement vga_switcheroo_client_ops.pre_switch drm/nouveau: Implement vga_switcheroo_client_ops.post_switch drm/radeon: Implement struct vga_switcheroo_client_ops.pre_switch vga-switcheroo: Remove unused interfaces drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 9 ++++- drivers/gpu/drm/clients/drm_fbdev_client.c | 23 ++++++++---- drivers/gpu/drm/drm_client_event.c | 18 ++++++++++ drivers/gpu/drm/drm_edid.c | 1 + drivers/gpu/drm/i915/i915_switcheroo.c | 11 +++++- drivers/gpu/drm/nouveau/nouveau_vga.c | 28 +++++++++------ drivers/gpu/drm/radeon/radeon_device.c | 9 ++++- drivers/gpu/vga/vga_switcheroo.c | 41 +++++----------------- drivers/video/fbdev/core/fbcon.c | 8 ----- include/drm/drm_client.h | 14 ++++++++ include/drm/drm_client_event.h | 3 ++ include/linux/vga_switcheroo.h | 30 +++++++++------- 12 files changed, 122 insertions(+), 73 deletions(-) base-commit: cd8abe2554ec7eba16c1d48ab508732bf93534eb -- 2.54.0