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bh=N9NOrtGcWe/7OoAPY9wKEXhutF0rwa6sGozRWEnsGio=; b=+4scsQUXx2stkIWSRjwCicW4Opzmwcp3MuAz2FUFQFG9D05Br2gDAq5eedQnWrp40+RFdA OVireYxHsLpMfXBQ== 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 15F3513800; Wed, 17 Jan 2024 12:55:29 +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 jtAwBEHOp2X1YQAAD6G6ig (envelope-from ); Wed, 17 Jan 2024 12:55:29 +0000 From: Thomas Zimmermann To: javierm@redhat.com, pjones@redhat.com, deller@gmx.de, ardb@kernel.org Cc: dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, Thomas Zimmermann Subject: [PATCH 0/8] firmware/sysfb: Track parent device for screen_info Date: Wed, 17 Jan 2024 13:39:04 +0100 Message-ID: <20240117125527.23324-1-tzimmermann@suse.de> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-fbdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Authentication-Results: smtp-out1.suse.de; none X-Spamd-Result: default: False [4.90 / 50.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; FREEMAIL_ENVRCPT(0.00)[gmx.de]; R_MISSING_CHARSET(2.50)[]; MIME_GOOD(-0.10)[text/plain]; TO_MATCH_ENVRCPT_ALL(0.00)[]; BROKEN_CONTENT_TYPE(1.50)[]; RCVD_COUNT_THREE(0.00)[3]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; RCPT_COUNT_SEVEN(0.00)[7]; MID_CONTAINS_FROM(1.00)[]; FREEMAIL_TO(0.00)[redhat.com,gmx.de,kernel.org]; FUZZY_BLOCKED(0.00)[rspamd.com]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_TLS_ALL(0.00)[] X-Spam-Level: **** X-Spam-Score: 4.90 X-Spam-Flag: NO Detect the firmware framebuffer's parent device from the global screen_info state and set up the framebuffer's device accordingly. Remove the equivalent functionality from efifb. Other drivers for firmware framebuffers, such as simpledrm or vesafb, now add these new features. Patches 1 and 2 provide a set of helper functions to avoid parsing the screen_info values manually. Decoding screen_info is fragile and many drivers get it wrong. We should later adopt these helpers in existing drivers, such as efifb, vesafb, as well. Patches 3 and 4 set the firmware framebuffer's parent device. There is code in efifb to do something similar for power management. That is now obsolete and being cleaned up. Setting the parent device makes Linux track the power management correctly. Patches 5 and 6 track the parent device's enable state. We don't create framebuffer devices if the underlying hardware device has been disabled. Remove the functionality from efifb. Patches 7 and 8 track the parent device's PCI BAR location. It can happen on aarch64 that the firmware framebuffer moves its location during the kernel's boot. We now fix up the screen_info state to point to the correct location. Again remove such functionality from efifb. Thomas Zimmermann (8): video: Add helpers for decoding screen_info video: Provide screen_info_get_pci_dev() to find screen_info's PCI device firmware/sysfb: Set firmware-framebuffer parent device fbdev/efifb: Remove PM for parent device firmware/sysfb: Create firmware device only for enabled PCI devices fbdev/efifb: Do not track parent device status firmware/sysfb: Update screen_info for relocated EFI framebuffers fbdev/efifb: Remove framebuffer relocation tracking drivers/firmware/Kconfig | 1 + drivers/firmware/sysfb.c | 37 ++++++- drivers/firmware/sysfb_simplefb.c | 5 +- drivers/video/Kconfig | 4 + drivers/video/Makefile | 4 + drivers/video/fbdev/efifb.c | 97 +----------------- drivers/video/screen_info_generic.c | 148 ++++++++++++++++++++++++++++ drivers/video/screen_info_pci.c | 142 ++++++++++++++++++++++++++ include/linux/screen_info.h | 126 +++++++++++++++++++++++ include/linux/sysfb.h | 3 +- 10 files changed, 472 insertions(+), 95 deletions(-) create mode 100644 drivers/video/screen_info_generic.c create mode 100644 drivers/video/screen_info_pci.c