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bh=9iImtIJVQ2vQCwmVHx7rSwwOm8Ymo0bN7pYHn8SbPOQ=; b=WXBSIavqRsO0rBEpTmkRZ4NpIKM/Xrqjz0tTyBd/AyJYOkzkt5k/drgTnUc4n91XgjDlpP 5sjqsBSHNqddaYBQ== 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 3F35213676; Thu, 6 Mar 2025 14:13:09 +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 vfMcDnWtyWeveQAAD6G6ig (envelope-from ); Thu, 06 Mar 2025 14:13:09 +0000 From: Thomas Zimmermann To: lee@kernel.org, pavel@ucw.cz, danielt@kernel.org, jingoohan1@gmail.com, deller@gmx.de, simona@ffwll.ch Cc: linux-leds@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, Thomas Zimmermann Subject: [PATCH v3 00/11] backlight, lcd, led: Remove fbdev dependencies Date: Thu, 6 Mar 2025 15:05:42 +0100 Message-ID: <20250306140947.580324-1-tzimmermann@suse.de> X-Mailer: git-send-email 2.48.1 MIME-Version: 1.0 X-Spamd-Result: default: False [-2.80 / 50.00]; BAYES_HAM(-3.00)[100.00%]; MID_CONTAINS_FROM(1.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_MISSING_CHARSET(0.50)[]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; TO_MATCH_ENVRCPT_ALL(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; ARC_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; FROM_HAS_DN(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo,suse.de:mid]; FREEMAIL_TO(0.00)[kernel.org,ucw.cz,gmail.com,gmx.de,ffwll.ch]; RCVD_TLS_ALL(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; RCPT_COUNT_SEVEN(0.00)[10]; FUZZY_BLOCKED(0.00)[rspamd.com]; TO_DN_SOME(0.00)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; FREEMAIL_ENVRCPT(0.00)[gmail.com,gmx.de] X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" This series removes the remaining dependencies on fbdev from the backlight, lcd and led subsystems. Each depends on fbdev events to track display state. Make fbdev inform each subsystem via a dedicated interface instead. Patches 1 to 3 make fbdev track blank state for each display, so that backlight code doesn't have to. Patches 4 to 6 remove fbdev event handling from backlight code. Patches 7 and 8 remove fbdev event handling from lcd code and patches 9 and 10 do the same for led's backlight trigger. The final patch removes the event constants from fbdev. With the series applied, the three subsystems do no longer depend on fbdev. It's also a clean up for fbdev. Fbdev used to send out a large number of events. That mechanism has been deprecated for some time and converted call to dedicated functions instead. Testing is very welcome, as I don't have the hardware to test this series. v3: - export several symbols - static-inline declare empty placeholders v2: - avoid IS_REACHABLE() in source file (Lee) - simplify several interfaces and helpers - use lock guards - initialize global lists and mutices Thomas Zimmermann (11): fbdev: Rework fb_blank() fbdev: Track display blanking state fbdev: Send old blank state in FB_EVENT_BLANK backlight: Implement fbdev tracking with blank state from event backlight: Move blank-state handling into helper backlight: Replace fb events with a dedicated function call backlight: lcd: Move event handling into helpers backlight: lcd: Replace fb events with a dedicated function call leds: backlight trigger: Move blank-state handling into helper leds: backlight trigger: Replace fb events with a dedicated function call fbdev: Remove constants of unused events drivers/leds/trigger/ledtrig-backlight.c | 48 +++++----- drivers/video/backlight/backlight.c | 93 +++++-------------- drivers/video/backlight/lcd.c | 108 +++++++++-------------- drivers/video/fbdev/core/fb_backlight.c | 12 +++ drivers/video/fbdev/core/fb_info.c | 1 + drivers/video/fbdev/core/fbmem.c | 82 ++++++++++++++--- drivers/video/fbdev/core/fbsysfs.c | 8 +- include/linux/backlight.h | 22 ++--- include/linux/fb.h | 12 +-- include/linux/lcd.h | 21 ++++- include/linux/leds.h | 6 ++ 11 files changed, 205 insertions(+), 208 deletions(-)