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Fri, 21 Nov 2025 16:09:44 +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 oC3CHMiOIGlneAAAD6G6ig (envelope-from ); Fri, 21 Nov 2025 16:09:44 +0000 Message-ID: <6dff8e7e-c99b-443d-a1d8-22650ca0b595@suse.de> Date: Fri, 21 Nov 2025 17:09:44 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 0/6] arch, sysfb: Move screen and edid info into single place From: Thomas Zimmermann To: Ard Biesheuvel Cc: Arnd Bergmann , Javier Martinez Canillas , x86@kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-efi@vger.kernel.org, loongarch@lists.linux.dev, linux-riscv@lists.infradead.org, dri-devel@lists.freedesktop.org, linux-hyperv@vger.kernel.org, linux-pci@vger.kernel.org, linux-fbdev@vger.kernel.org References: <20251121135624.494768-1-tzimmermann@suse.de> <96a8d591-29d5-4764-94f9-6042252e53ff@app.fastmail.com> <199e7538-5b4a-483b-8976-84e4a8a0f2fd@suse.de> Content-Language: en-US Autocrypt: addr=tzimmermann@suse.de; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: D08F4219AE X-Rspamd-Server: rspamd2.dmz-prg2.suse.org X-Spamd-Result: default: False [-4.51 / 50.00]; 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)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.com:url,arndb.de:email,suse.de:email,suse.de:mid,suse.de:dkim]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; RBL_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:104:10:150:64:97:from]; ARC_NA(0.00)[]; FUZZY_RATELIMITED(0.00)[rspamd.com]; RCPT_COUNT_TWELVE(0.00)[13]; MIME_TRACE(0.00)[0:+]; TO_MATCH_ENVRCPT_ALL(0.00)[]; RCVD_TLS_ALL(0.00)[]; DKIM_TRACE(0.00)[suse.de:+]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; RECEIVED_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:106:10:150:64:167:received]; MID_RHS_MATCH_FROM(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; SPAMHAUS_XBL(0.00)[2a07:de40:b281:104:10:150:64:97:from] X-Rspamd-Action: no action X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251121_080947_310305_A1C9A412 X-CRM114-Status: GOOD ( 13.31 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Am 21.11.25 um 17:08 schrieb Thomas Zimmermann: > Hi > > Am 21.11.25 um 16:56 schrieb Ard Biesheuvel: >> On Fri, 21 Nov 2025 at 16:53, Thomas Zimmermann >> wrote: >>> Hi >>> >>> Am 21.11.25 um 16:16 schrieb Ard Biesheuvel: >>>> On Fri, 21 Nov 2025 at 16:10, Arnd Bergmann wrote: >>>>> On Fri, Nov 21, 2025, at 14:36, Thomas Zimmermann wrote: >>>>>> Replace screen_info and edid_info with sysfb_primary_device of type >>>>>> struct sysfb_display_info. Update all users. >>>>>> >>>>>> Sysfb DRM drivers currently fetch the global edid_info directly, >>>>>> when >>>>>> they should get that information together with the screen_info >>>>>> from their >>>>>> device. Wrapping screen_info and edid_info in >>>>>> sysfb_primary_display and >>>>>> passing this to drivers enables this. >>>>>> >>>>>> Replacing both with sysfb_primary_display has been motivate by >>>>>> the EFI >>>>>> stub. EFI wants to transfer EDID via config table in a single entry. >>>>>> Using struct sysfb_display_info this will become easily possible. >>>>>> Hence >>>>>> accept some churn in architecture code for the long-term >>>>>> improvements. >>>>> This all looks good to me, >>>>> >>>>> Acked-by: Arnd Bergmann >>> Thanks >>> >>>>> It should also bring us one step closer to eventually >>>>> disconnecting the x86 boot ABI from the kernel-internal >>>>> sysfb_primary_display. >>>>> >>>> Agreed >>>> >>>> Acked-by: Ard Biesheuvel >>> Thanks >>> >>>> I can take patches 1-2 right away, if that helps during the next >>>> cycle. >>>   From my sysfb-focused POV, these patches would ideally all go through >>> the same tree, say efi or generic arch, or whatever fits best. Most of >>> the other code is only renames anyway. >>> >> I don't mind queueing all of it, but I did get a conflict on >> drivers/pci/vgaarb.c > > Probably from a78835b86a44 ("PCI/VGA: Select SCREEN_INFO on X86") https://lore.kernel.org/all/20251013220829.1536292-1-superm1@kernel.org/ >  that I have in my tree. You can fix it by replacing screen_info with > sysfb_primary_display.screen. The later merge conflict seems manageable. > > Best regards > Thomas > > -- -- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Frankenstr. 146, 90461 Nürnberg, Germany, www.suse.com GF: Jochen Jaser, Andrew McDonald, Werner Knoblich, (HRB 36809, AG Nürnberg)