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Thu, 9 Jul 2026 09:22:20 +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 Ht0JMExoT2q6OQAAD6G6ig (envelope-from ); Thu, 09 Jul 2026 09:22:20 +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 v2 0/7] vga_switcheroo, drm: Push fbcon handling into DRM clients Date: Thu, 9 Jul 2026 11:15:56 +0200 Message-ID: <20260709092215.168172-1-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-Spam-Flag: NO X-Rspamd-Action: no action X-Spam-Level: X-Spamd-Result: default: False [-3.01 / 50.00]; BAYES_HAM(-3.00)[100.00%]; MID_CONTAINS_FROM(1.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_MISSING_CHARSET(0.50)[]; R_DKIM_ALLOW(-0.20)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; MX_GOOD(-0.01)[]; RBL_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:104:10:150:64:97:from]; FREEMAIL_TO(0.00)[wunner.de,redhat.com,amd.com,gmail.com,ffwll.ch,linux.intel.com,kernel.org,intel.com,ursulin.net,gmx.de]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; FUZZY_RATELIMITED(0.00)[rspamd.com]; ARC_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; SPAMHAUS_XBL(0.00)[2a07:de40:b281:104:10:150:64:97:from]; RCPT_COUNT_TWELVE(0.00)[22]; RCVD_COUNT_TWO(0.00)[2]; TO_MATCH_ENVRCPT_ALL(0.00)[]; FROM_HAS_DN(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; RECEIVED_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:106:10:150:64:167:received]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo,imap1.dmz-prg2.suse.org:rdns,suse.de:mid,suse.de:dkim]; FROM_EQ_ENVFROM(0.00)[]; R_RATELIMIT(0.00)[to_ip_from(RLgosu6qu4h11rje89ht7rjgg5)]; RCVD_TLS_ALL(0.00)[]; DKIM_TRACE(0.00)[suse.de:+]; TO_DN_SOME(0.00)[]; FREEMAIL_ENVRCPT(0.00)[gmail.com,gmx.de] X-Rspamd-Server: rspamd2.dmz-prg2.suse.org X-Rspamd-Queue-Id: 629A675D87 X-Spam-Score: -3.01 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. There are only four drivers that support vga_switcheroo: amdgpu, radeon, i915 and nouveau. Update each of them with the new callback. When vga_switcheroo now invokes pre_switch, each DRM driver forwards to aquire_outputs and lets the DRM clients handle the new outputs. 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. Also replace the existing reprobe hook with post_switch for symetry. For nouveau, this is merely a rename of the helper function. The other drivers dor not implement reprobe. Tested with radeon on a notebook with Radeon HD 4225 and HD 5430. v2: - implement all of pre_switch in a single commit to avoid possible deadlock in intermediate state (Sashiko) - fix erroneous docs (Sashiko) Thomas Zimmermann (7): 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: Implement struct vga_switcheroo_client_ops.pre_switch drm: Implement vga_switcheroo_client_ops.post_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 | 29 ++++++++------- 12 files changed, 121 insertions(+), 73 deletions(-) base-commit: 88c6be63ac7e9238c7791977d3f496ce6623afe4 -- 2.54.0