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charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 6BBB11F78A X-Spam-Level: X-Rspamd-Server: rspamd2.dmz-prg2.suse.org X-Rspamd-Action: no action X-Spam-Flag: NO X-Spamd-Result: default: False [-13.50 / 50.00]; SUSE_INTERNAL_BYPASS(-9.00)[]; BAYES_HAM(-3.00)[100.00%]; NEURAL_HAM_LONG(-1.00)[-1.000]; 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]; XM_UA_NO_VERSION(0.01)[]; MX_GOOD(-0.01)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; FREEMAIL_TO(0.00)[loongson.cn,gmail.com,linux.intel.com,kernel.org,ffwll.ch]; MIME_TRACE(0.00)[0:+]; TO_MATCH_ENVRCPT_ALL(0.00)[]; ARC_NA(0.00)[]; RBL_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:104:10:150:64:97:from]; FREEMAIL_ENVRCPT(0.00)[gmail.com]; DKIM_TRACE(0.00)[suse.de:+]; TO_DN_SOME(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; RCVD_TLS_ALL(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; RECEIVED_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:106:10:150:64:167:received]; RCPT_COUNT_SEVEN(0.00)[9]; RCVD_VIA_SMTP_AUTH(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:rdns,imap1.dmz-prg2.suse.org:helo,suse.com:url,suse.de:dkim] X-Spam-Score: -13.50 Hi Am 30.10.26 um 08:04 schrieb zhaotianrui: > > 在 2026/10/29 下午4:16, Thomas Zimmermann 写道: >> Hi >> >> Am 29.10.26 um 02:36 schrieb Tianrui Zhao: >>> LoongArch systems with hybrid graphics (integrated + >>> discrete GPU) can benefit from the same GPU switching >>> mechanism that x86 laptops use. Relax the dependency >>> to allow VGA_SWITCHEROO to be built on LoongArch, >>> consistent with the existing dependencies on ACPI, >>> PCI, and FB=y. >>> >>> Change-Id: I84d38fdfe5e1591495fb3681474a7f1f64281fa8 >> >> Internal change ids should be remove before submitting patches. >> > Thanks for your review, I will fix this. > > > Best regards > > Tianrui Zhao > >>> Signed-off-by: Tianrui Zhao >>> --- >>>   drivers/gpu/vga/Kconfig | 2 +- >>>   1 file changed, 1 insertion(+), 1 deletion(-) >>> >>> diff --git a/drivers/gpu/vga/Kconfig b/drivers/gpu/vga/Kconfig >>> index bad4bcee313..89edd1211aa 100644 >>> --- a/drivers/gpu/vga/Kconfig >>> +++ b/drivers/gpu/vga/Kconfig >>> @@ -1,7 +1,7 @@ >>>   # SPDX-License-Identifier: GPL-2.0-only >>>   config VGA_SWITCHEROO >>>       bool "Laptop Hybrid Graphics - GPU switching support" >>> -    depends on X86 >>> +    depends on X86 || LOONGARCH >> >> I'm a bit skeptical if that's all there is to do.  Does loongarch >> really work with the existing handlers in the graphics drivers >> as-is?  See [1] for the interface that implements the actual switching. >> >> [1] >> https://elixir.bootlin.com/linux/v7.3/source/include/linux/vga_switcheroo.h#L93 >> >> Best regards >> Thomas >> > Thanks,  I will carefully check whether all these > vga_switcheroo_handler callbacks are supported on the LoongArch platform. Switcheroo used to be required for x86 notebooks from ~2010. Those systems had two graphics cards, but only one set of output connectors. That design is become rare, I think. So I'm a bit surprised to see it come back. Which loongarch systems are there? Best regards Thomas > > > Best regards > > Tianrui Zhao > >>>       depends on ACPI >>>       depends on PCI >>>       depends on FB=y >> > -- -- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Frankenstr. 146, 90461 Nürnberg, Germany, www.suse.com GF: Stefan Gaiser, Jochen Jaser, Abhinav Puri, (HRB 36809, AG Nürnberg)