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Mon, 24 Nov 2025 16:51:24 +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 sH6tCgyNJGm3GgAAD6G6ig (envelope-from ); Mon, 24 Nov 2025 16:51:24 +0000 From: Thomas Zimmermann To: ardb@kernel.org, javierm@redhat.com, arnd@arndb.de, richard.lyu@suse.com Cc: 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, Thomas Zimmermann Subject: [PATCH v2 00/10] arch,sysfb,efi: Support EDID on non-x86 EFI systems Date: Mon, 24 Nov 2025 17:40:12 +0100 Message-ID: <20251124165116.502813-1-tzimmermann@suse.de> X-Mailer: git-send-email 2.51.1 Precedence: bulk X-Mailing-List: linux-fbdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Level: X-Spam-Flag: NO X-Rspamd-Queue-Id: 9A19D21FE7 X-Rspamd-Action: no action X-Rspamd-Server: rspamd1.dmz-prg2.suse.org X-Spamd-Result: default: False [-3.01 / 50.00]; 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Update all users. Then implement EDID support in EFI's libstub. 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. Add a new UUID to transfer sysfb_primary_display via EFI's config table. Then implement support in the kernel and EFI's libstub. Patches 1 and 2 reduce the exposure of screen_info in EFI-related code. Patch 3 adds struct sysfb_display_info. Patch 4 replaces scren_info with sysfb_primary_display. This results in several changes throught the kernel, but is really just a refactoring. Patch 5 updates sysfb to transfer sysfb_primary_display to the related drivers. Patch 6 moves edid_info into sysfb_primary_display. This resolves some drivers' reference to the global edid_info, but also makes the EDID data available on non-x86 architectures. Patches 7 and 8 add kernel-side support for EDID transfers on non-x86 EFI systems. Patches 9 implements EDID support in libstub. Patch 10 cleans up the config-table allocation to be easier to understand. This is v2 of the series. It combines v1 of the series at [1] plus changes from [2] and [3]. [1] https://lore.kernel.org/dri-devel/20251121135624.494768-1-tzimmermann@suse.de/ [2] https://lore.kernel.org/dri-devel/20251015160816.525825-1-tzimmermann@suse.de/ [3] https://lore.kernel.org/linux-efi/20251119123011.1187249-5-ardb+git@google.com/ Thomas Zimmermann (10): efi: earlycon: Reduce number of references to global screen_info efi: sysfb_efi: Reduce number of references to global screen_info sysfb: Add struct sysfb_display_info sysfb: Replace screen_info with sysfb_primary_display sysfb: Pass sysfb_primary_display to devices sysfb: Move edid_info into sysfb_primary_display efi: Refactor init_primary_display() helpers efi: Support EDID information efi: libstub: Transfer EDID to kernel efi: libstub: Simplify interfaces for primary_display arch/arm64/kernel/image-vars.h | 2 +- arch/loongarch/kernel/efi.c | 47 +++++++---- arch/loongarch/kernel/image-vars.h | 2 +- arch/riscv/kernel/image-vars.h | 2 +- arch/x86/kernel/kexec-bzimage64.c | 4 +- arch/x86/kernel/setup.c | 16 ++-- arch/x86/video/video-common.c | 4 +- drivers/firmware/efi/earlycon.c | 42 +++++----- drivers/firmware/efi/efi-init.c | 47 +++++++---- drivers/firmware/efi/efi.c | 2 + drivers/firmware/efi/libstub/Makefile | 2 +- drivers/firmware/efi/libstub/efi-stub-entry.c | 36 +++++++-- drivers/firmware/efi/libstub/efi-stub.c | 49 +++++++---- drivers/firmware/efi/libstub/efistub.h | 7 +- .../firmware/efi/libstub/primary_display.c | 41 ++++++++++ drivers/firmware/efi/libstub/screen_info.c | 53 ------------ drivers/firmware/efi/libstub/zboot.c | 6 +- drivers/firmware/efi/sysfb_efi.c | 81 ++++++++++--------- drivers/firmware/sysfb.c | 13 +-- drivers/firmware/sysfb_simplefb.c | 2 +- drivers/gpu/drm/sysfb/efidrm.c | 14 ++-- drivers/gpu/drm/sysfb/vesadrm.c | 14 ++-- drivers/hv/vmbus_drv.c | 6 +- drivers/pci/vgaarb.c | 4 +- drivers/video/Kconfig | 8 +- drivers/video/fbdev/core/fbmon.c | 8 +- drivers/video/fbdev/efifb.c | 10 ++- drivers/video/fbdev/vesafb.c | 10 ++- drivers/video/fbdev/vga16fb.c | 8 +- drivers/video/screen_info_pci.c | 5 +- include/linux/efi.h | 8 +- include/linux/screen_info.h | 2 - include/linux/sysfb.h | 23 ++++-- include/video/edid.h | 4 - 34 files changed, 337 insertions(+), 245 deletions(-) create mode 100644 drivers/firmware/efi/libstub/primary_display.c delete mode 100644 drivers/firmware/efi/libstub/screen_info.c base-commit: d724c6f85e80a23ed46b7ebc6e38b527c09d64f5 -- 2.51.1