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Mon, 20 Jul 2026 11:58:30 +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 QBciDGYNXmrTNwAAD6G6ig (envelope-from ); Mon, 20 Jul 2026 11:58:30 +0000 Message-ID: <345d7f81-e86e-48ef-af23-277dc0ae16d1@suse.de> Date: Mon, 20 Jul 2026 13:58:29 +0200 Precedence: bulk X-Mailing-List: linux-fbdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 0/7] vga_switcheroo, drm: Push fbcon handling into DRM clients To: Helge Deller Cc: dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org References: <20260709092215.168172-1-tzimmermann@suse.de> <88fa0f85-0960-464a-a602-f797785f0c2e@gmx.de> Content-Language: en-US From: Thomas Zimmermann Autocrypt: addr=tzimmermann@suse.de; keydata= xsBNBFs50uABCADEHPidWt974CaxBVbrIBwqcq/WURinJ3+2WlIrKWspiP83vfZKaXhFYsdg XH47fDVbPPj+d6tQrw5lPQCyqjwrCPYnq3WlIBnGPJ4/jreTL6V+qfKRDlGLWFjZcsrPJGE0 BeB5BbqP5erN1qylK9i3gPoQjXGhpBpQYwRrEyQyjuvk+Ev0K1Jc5tVDeJAuau3TGNgah4Yc hdHm3bkPjz9EErV85RwvImQ1dptvx6s7xzwXTgGAsaYZsL8WCwDaTuqFa1d1jjlaxg6+tZsB 9GluwvIhSezPgnEmimZDkGnZRRSFiGP8yjqTjjWuf0bSj5rUnTGiyLyRZRNGcXmu6hjlABEB AAHNJ1Rob21hcyBaaW1tZXJtYW5uIDx0emltbWVybWFubkBzdXNlLmRlPsLAjgQTAQgAOAIb AwULCQgHAgYVCgkICwIEFgIDAQIeAQIXgBYhBHIX+6yM6c9jRKFo5WgNwR1TC3ojBQJftODH AAoJEGgNwR1TC3ojx1wH/0hKGWugiqDgLNXLRD/4TfHBEKmxIrmfu9Z5t7vwUKfwhFL6hqvo lXPJJKQpQ2z8+X2vZm/slsLn7J1yjrOsoJhKABDi+3QWWSGkaGwRJAdPVVyJMfJRNNNIKwVb U6B1BkX2XDKDGffF4TxlOpSQzdtNI/9gleOoUA8+jy8knnDYzjBNOZqLG2FuTdicBXblz0Mf vg41gd9kCwYXDnD91rJU8tzylXv03E75NCaTxTM+FBXPmsAVYQ4GYhhgFt8S2UWMoaaABLDe 7l5FdnLdDEcbmd8uLU2CaG4W2cLrUaI4jz2XbkcPQkqTQ3EB67hYkjiEE6Zy3ggOitiQGcqp j//OwE0EWznS4AEIAMYmP4M/V+T5RY5at/g7rUdNsLhWv1APYrh9RQefODYHrNRHUE9eosYb T6XMryR9hT8XlGOYRwKWwiQBoWSDiTMo/Xi29jUnn4BXfI2px2DTXwc22LKtLAgTRjP+qbU6 3Y0xnQN29UGDbYgyyK51DW3H0If2a3JNsheAAK+Xc9baj0LGIc8T9uiEWHBnCH+RdhgATnWW GKdDegUR5BkDfDg5O/FISymJBHx2Dyoklv5g4BzkgqTqwmaYzsl8UxZKvbaxq0zbehDda8lv hFXodNFMAgTLJlLuDYOGLK2AwbrS3Sp0AEbkpdJBb44qVlGm5bApZouHeJ/+n+7r12+lqdsA EQEAAcLAdgQYAQgAIAIbDBYhBHIX+6yM6c9jRKFo5WgNwR1TC3ojBQJftOH6AAoJEGgNwR1T C3ojVSkIALpAPkIJPQoURPb1VWjh34l0HlglmYHvZszJWTXYwavHR8+k6Baa6H7ufXNQtThR yIxJrQLW6rV5lm7TjhffEhxVCn37+cg0zZ3j7zIsSS0rx/aMwi6VhFJA5hfn3T0TtrijKP4A SAQO9xD1Zk9/61JWk8OysuIh7MXkl0fxbRKWE93XeQBhIJHQfnc+YBLprdnxR446Sh8Wn/2D Ya8cavuWf2zrB6cZurs048xe0UbSW5AOSo4V9M0jzYI4nZqTmPxYyXbm30Kvmz0rYVRaitYJ 4kyYYMhuULvrJDMjZRvaNe52tkKAvMevcGdt38H4KSVXAylqyQOW5zvPc4/sq9c= In-Reply-To: <88fa0f85-0960-464a-a602-f797785f0c2e@gmx.de> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Flag: NO X-Spam-Score: -4.30 X-Spamd-Result: default: False [-4.30 / 50.00]; BAYES_HAM(-3.00)[100.00%]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-0.20)[-0.996]; MIME_GOOD(-0.10)[text/plain]; ARC_NA(0.00)[]; FUZZY_RATELIMITED(0.00)[rspamd.com]; MIME_TRACE(0.00)[0:+]; TO_DN_SOME(0.00)[]; FREEMAIL_TO(0.00)[gmx.de]; RCVD_VIA_SMTP_AUTH(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; FREEMAIL_ENVRCPT(0.00)[gmx.de]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; RCVD_TLS_ALL(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.com:url,imap1.dmz-prg2.suse.org:helo,suse.de:mid] X-Spam-Level: Hi Am 18.07.26 um 21:08 schrieb Helge Deller: > Hi Thomas, > > On 7/9/26 11:15, Thomas Zimmermann wrote: >> 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(-) > You may add a > Acked-by: Helge Deller > to the series. Thank you so much. > > Just in case you want me to take the series through the fbdev git tree, > please let me know. The series is supposed to go though DRM trees. I'm still waiting for reviews from the rsp devs. Best regards Thomas > > Helge -- -- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Frankenstr. 146, 90461 Nürnberg, Germany, www.suse.com GF: Jochen Jaser, Andrew McDonald, (HRB 36809, AG Nürnberg)