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MID_RHS_MATCH_FROM(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; TAGGED_RCPT(0.00)[]; RCVD_TLS_ALL(0.00)[]; DKIM_TRACE(0.00)[suse.de:+]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo,imap1.dmz-prg2.suse.org:rdns,suse.de:mid,suse.de:dkim,suse.de:email] X-Spam-Flag: NO X-Spam-Level: X-Rspamd-Queue-Id: 7F07237EF1 X-Rspamd-Server: rspamd2.dmz-prg2.suse.org X-Rspamd-Action: no action X-Spam-Score: -3.01 Hi Am 10.09.25 um 17:25 schrieb Michael Kelley: > From: Thomas Zimmermann Sent: Wednesday, September 10, 2025 2:36 AM >> Hi >> >> Am 09.09.25 um 18:58 schrieb Prasanna Kumar T S M: >>> The Hyper-V DRM driver is available since kernel version 5.14 and >>> provides full KMS support along with fbdev emulation via the DRM fbdev >>> helpers. This makes the hyperv_fb driver redundant, remove it. >> I'm all for removing obsolete drivers. But hyperv_drm likely first needs >> to merge the patch at >> https://lore.kernel.org/dri-devel/20250904145806.430568-5-tzimmermann@suse.de/ >> It's been tested and works well. If maintainers from Microsoft have a >> look at the patch first, we could possibly land it fairly soon. > Thomas -- > > My testing of your v3 patch series for vblank timers ended up getting a > WARN_ON after about 3 days of usage. See [1]. So I don't think it's 100% > ready yet. Yeah, I've seen your message, but didn't have time to investigate yet. It might not be that much of an issue. > > But I agree we need your synthetic vblank timer support to address the > Hyper-V DRM driver performance issue, before removing the Hyper-V > fbdev driver. (See [2] for a description of the performance issue.) > > Second, isn't it customary to mark a driver as deprecated for a period > of time, before removing it entirely? I don't see any documentation > on the deprecation process, but I've seen it done in other cases. If you > grep through all the kernel Kconfig files, you'll see entries tagged with > DEPRECATED. Also the driver should be updated to output a deprecated > message when it loads. Sure, we can do that. Best regards Thomas > > Michael > > [1] https://lore.kernel.org/dri-devel/BN7PR02MB4148E80C13605F6EAD2B0A03D40FA@BN7PR02MB4148.namprd02.prod.outlook.com/ > [2] https://lore.kernel.org/dri-devel/SN6PR02MB415702B00D6D52B0EE962C98D46CA@SN6PR02MB4157.namprd02.prod.outlook.com/ > >> Best regards >> Thomas >> >>> Signed-off-by: Prasanna Kumar T S M >>> --- >>> MAINTAINERS | 1 - >>> drivers/video/fbdev/Kconfig | 8 - >>> drivers/video/fbdev/Makefile | 1 - >>> drivers/video/fbdev/hyperv_fb.c | 1386 ------------------------------- >>> 4 files changed, 1396 deletions(-) >>> delete mode 100644 drivers/video/fbdev/hyperv_fb.c >>> -- -- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Frankenstrasse 146, 90461 Nuernberg, Germany GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman HRB 36809 (AG Nuernberg)