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bh=FMbAUOTFQxMb5k2XP3cMn8vSb9OHRgu3gg/bt0adrVY=; b=9uaghDHqHd9lfhl9gL0T/iR2HdO0mjB3gy0Wzs6SXNwTJ4g537aFdfpa7WL0R3PljSge0l TKuzhV1OkjhxXtCA== Received: from imap1.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap1.dmz-prg2.suse.org (Postfix) with ESMTPS id CE7E113419; Thu, 29 Oct 2026 08:16:55 +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 Ca0mIfcA42pMOQAAD6G6ig (envelope-from ); Thu, 29 Oct 2026 08:16:55 +0000 Message-ID: <5e547172-ac10-4a28-a584-9a385dbe2b80@suse.de> Date: Thu, 29 Oct 2026 09:16:55 +0100 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] vga-switcheroo: Allow VGA_SWITCHEROO to be enabled on LoongArch To: Tianrui Zhao , David Airlie , Maarten Lankhorst , Maxime Ripard , Simona Vetter , chenhuacai@loongson.cn Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, wuqianhai@loongson.cn References: <20261029013618.3558115-1-zhaotianrui@loongson.cn> Content-Language: en-US From: Thomas Zimmermann Autocrypt: addr=tzimmermann@suse.de; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit 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]; MX_GOOD(-0.01)[]; XM_UA_NO_VERSION(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)[]; DNSWL_BLOCKED(0.00)[2a07:de40:b281:106:10:150:64:167:received,2a07:de40:b281:104:10:150:64:97:from]; RCPT_COUNT_SEVEN(0.00)[9]; MID_RHS_MATCH_FROM(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)[suse.com:url,imap1.dmz-prg2.suse.org:rdns,imap1.dmz-prg2.suse.org:helo,bootlin.com:url,suse.de:dkim,loongson.cn:email] X-Rspamd-Server: rspamd1.dmz-prg2.suse.org X-Rspamd-Action: no action X-Spam-Flag: NO X-Spam-Score: -13.50 X-Spam-Level: X-Rspamd-Queue-Id: 3557F21E6D 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. > 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 > 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)