From patchwork Tue Jun 13 11:07:08 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 693523 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 630E1CA9EBD for ; Tue, 13 Jun 2023 11:11:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242220AbjFMLLA (ORCPT ); Tue, 13 Jun 2023 07:11:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49252 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242132AbjFMLKK (ORCPT ); Tue, 13 Jun 2023 07:10:10 -0400 Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.220.29]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7AA0D92; Tue, 13 Jun 2023 04:10:08 -0700 (PDT) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id 206FB1FDB8; Tue, 13 Jun 2023 11:10:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1686654607; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=4fsDwK3/MzhO/+4V6RVPaJy4VYKnZ6Si9bcp6FJanXE=; b=ejpVMux/b1QuE5CJU6PidS4DSV7XpXpptL73BBmKjZGHoVUoCLKEqBaQWRtkjAhQ61y1Pp qa2g7rJnvYOL7o74S/7RQsaur4g1DY3M1VvCeiMisUuC41kue4jW0NG16qV8nrARnawUHp pB/d21/T1XNPywj8DQb8SVxigC6P5VI= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1686654607; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=4fsDwK3/MzhO/+4V6RVPaJy4VYKnZ6Si9bcp6FJanXE=; b=eOd/H7swFJ8KgbTzvhB+A/cbC2LClWf584d8eN8j0pTCDq86IAYSI+ISMpWCOFnbaXBrdH ni1jqg3WGf3hZUDA== Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id BFE8413A47; Tue, 13 Jun 2023 11:10:06 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id 6GEALo5OiGR8CQAAMHmgww (envelope-from ); Tue, 13 Jun 2023 11:10:06 +0000 From: Thomas Zimmermann To: daniel@ffwll.ch, javierm@redhat.com, sam@ravnborg.org, deller@gmx.de, geert+renesas@glider.be, lee@kernel.org, daniel.thompson@linaro.org, jingoohan1@gmail.com, dan.carpenter@linaro.org, michael.j.ruhl@intel.com Cc: linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-sh@vger.kernel.org, linux-omap@vger.kernel.org, linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org, Thomas Zimmermann Subject: [PATCH v3 33/38] fbdev/core: Move framebuffer and backlight helpers into separate files Date: Tue, 13 Jun 2023 13:07:08 +0200 Message-ID: <20230613110953.24176-34-tzimmermann@suse.de> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230613110953.24176-1-tzimmermann@suse.de> References: <20230613110953.24176-1-tzimmermann@suse.de> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org Move framebuffer and backlight helpers into separate files. Leave fbsysfs.c to sysfs-related code. No functional changes. The framebuffer helpers are not in fbmem.c because they are under GPL-2.0-or-later copyright, while fbmem.c is GPL-2.0. v2: * include (Sam) Signed-off-by: Thomas Zimmermann Reviewed-by: Sam Ravnborg --- drivers/video/fbdev/core/Makefile | 4 +- drivers/video/fbdev/core/fb_backlight.c | 33 +++++++ drivers/video/fbdev/core/fb_info.c | 78 +++++++++++++++++ drivers/video/fbdev/core/fbsysfs.c | 110 +----------------------- 4 files changed, 115 insertions(+), 110 deletions(-) create mode 100644 drivers/video/fbdev/core/fb_backlight.c create mode 100644 drivers/video/fbdev/core/fb_info.c diff --git a/drivers/video/fbdev/core/Makefile b/drivers/video/fbdev/core/Makefile index 8f0060160ffb7..eee3295bc2252 100644 --- a/drivers/video/fbdev/core/Makefile +++ b/drivers/video/fbdev/core/Makefile @@ -1,7 +1,9 @@ # SPDX-License-Identifier: GPL-2.0 obj-$(CONFIG_FB_NOTIFY) += fb_notify.o obj-$(CONFIG_FB) += fb.o -fb-y := fbmem.o fbmon.o fbcmap.o fbsysfs.o \ +fb-y := fb_backlight.o \ + fb_info.o \ + fbmem.o fbmon.o fbcmap.o fbsysfs.o \ modedb.o fbcvt.o fb_cmdline.o fb_io_fops.o fb-$(CONFIG_FB_DEFERRED_IO) += fb_defio.o diff --git a/drivers/video/fbdev/core/fb_backlight.c b/drivers/video/fbdev/core/fb_backlight.c new file mode 100644 index 0000000000000..e2d3b3adc870f --- /dev/null +++ b/drivers/video/fbdev/core/fb_backlight.c @@ -0,0 +1,33 @@ +// SPDX-License-Identifier: GPL-2.0-or-later + +#include +#include +#include + +#if IS_ENABLED(CONFIG_FB_BACKLIGHT) +/* + * This function generates a linear backlight curve + * + * 0: off + * 1-7: min + * 8-127: linear from min to max + */ +void fb_bl_default_curve(struct fb_info *fb_info, u8 off, u8 min, u8 max) +{ + unsigned int i, flat, count, range = (max - min); + + mutex_lock(&fb_info->bl_curve_mutex); + + fb_info->bl_curve[0] = off; + + for (flat = 1; flat < (FB_BACKLIGHT_LEVELS / 16); ++flat) + fb_info->bl_curve[flat] = min; + + count = FB_BACKLIGHT_LEVELS * 15 / 16; + for (i = 0; i < count; ++i) + fb_info->bl_curve[flat + i] = min + (range * (i + 1) / count); + + mutex_unlock(&fb_info->bl_curve_mutex); +} +EXPORT_SYMBOL_GPL(fb_bl_default_curve); +#endif diff --git a/drivers/video/fbdev/core/fb_info.c b/drivers/video/fbdev/core/fb_info.c new file mode 100644 index 0000000000000..8bdbefdd4b701 --- /dev/null +++ b/drivers/video/fbdev/core/fb_info.c @@ -0,0 +1,78 @@ +// SPDX-License-Identifier: GPL-2.0-or-later + +#include +#include +#include +#include + +/** + * framebuffer_alloc - creates a new frame buffer info structure + * + * @size: size of driver private data, can be zero + * @dev: pointer to the device for this fb, this can be NULL + * + * Creates a new frame buffer info structure. Also reserves @size bytes + * for driver private data (info->par). info->par (if any) will be + * aligned to sizeof(long). + * + * Returns the new structure, or NULL if an error occurred. + * + */ +struct fb_info *framebuffer_alloc(size_t size, struct device *dev) +{ +#define BYTES_PER_LONG (BITS_PER_LONG/8) +#define PADDING (BYTES_PER_LONG - (sizeof(struct fb_info) % BYTES_PER_LONG)) + int fb_info_size = sizeof(struct fb_info); + struct fb_info *info; + char *p; + + if (size) + fb_info_size += PADDING; + + p = kzalloc(fb_info_size + size, GFP_KERNEL); + + if (!p) + return NULL; + + info = (struct fb_info *) p; + + if (size) + info->par = p + fb_info_size; + + info->device = dev; + info->fbcon_rotate_hint = -1; + +#if IS_ENABLED(CONFIG_FB_BACKLIGHT) + mutex_init(&info->bl_curve_mutex); +#endif + + return info; +#undef PADDING +#undef BYTES_PER_LONG +} +EXPORT_SYMBOL(framebuffer_alloc); + +/** + * framebuffer_release - marks the structure available for freeing + * + * @info: frame buffer info structure + * + * Drop the reference count of the device embedded in the + * framebuffer info structure. + * + */ +void framebuffer_release(struct fb_info *info) +{ + if (!info) + return; + + if (WARN_ON(refcount_read(&info->count))) + return; + +#if IS_ENABLED(CONFIG_FB_BACKLIGHT) + mutex_destroy(&info->bl_curve_mutex); +#endif + + kfree(info); +} +EXPORT_SYMBOL(framebuffer_release); diff --git a/drivers/video/fbdev/core/fbsysfs.c b/drivers/video/fbdev/core/fbsysfs.c index 0c33c4adcd798..849073f1ca067 100644 --- a/drivers/video/fbdev/core/fbsysfs.c +++ b/drivers/video/fbdev/core/fbsysfs.c @@ -5,93 +5,12 @@ * Copyright (c) 2004 James Simmons */ -/* - * Note: currently there's only stubs for framebuffer_alloc and - * framebuffer_release here. The reson for that is that until all drivers - * are converted to use it a sysfsification will open OOPSable races. - */ - -#include -#include +#include #include #include -#include -#include #define FB_SYSFS_FLAG_ATTR 1 -/** - * framebuffer_alloc - creates a new frame buffer info structure - * - * @size: size of driver private data, can be zero - * @dev: pointer to the device for this fb, this can be NULL - * - * Creates a new frame buffer info structure. Also reserves @size bytes - * for driver private data (info->par). info->par (if any) will be - * aligned to sizeof(long). - * - * Returns the new structure, or NULL if an error occurred. - * - */ -struct fb_info *framebuffer_alloc(size_t size, struct device *dev) -{ -#define BYTES_PER_LONG (BITS_PER_LONG/8) -#define PADDING (BYTES_PER_LONG - (sizeof(struct fb_info) % BYTES_PER_LONG)) - int fb_info_size = sizeof(struct fb_info); - struct fb_info *info; - char *p; - - if (size) - fb_info_size += PADDING; - - p = kzalloc(fb_info_size + size, GFP_KERNEL); - - if (!p) - return NULL; - - info = (struct fb_info *) p; - - if (size) - info->par = p + fb_info_size; - - info->device = dev; - info->fbcon_rotate_hint = -1; - -#if IS_ENABLED(CONFIG_FB_BACKLIGHT) - mutex_init(&info->bl_curve_mutex); -#endif - - return info; -#undef PADDING -#undef BYTES_PER_LONG -} -EXPORT_SYMBOL(framebuffer_alloc); - -/** - * framebuffer_release - marks the structure available for freeing - * - * @info: frame buffer info structure - * - * Drop the reference count of the device embedded in the - * framebuffer info structure. - * - */ -void framebuffer_release(struct fb_info *info) -{ - if (!info) - return; - - if (WARN_ON(refcount_read(&info->count))) - return; - -#if IS_ENABLED(CONFIG_FB_BACKLIGHT) - mutex_destroy(&info->bl_curve_mutex); -#endif - - kfree(info); -} -EXPORT_SYMBOL(framebuffer_release); - static int activate(struct fb_info *fb_info, struct fb_var_screeninfo *var) { int err; @@ -551,30 +470,3 @@ void fb_cleanup_device(struct fb_info *fb_info) fb_info->class_flag &= ~FB_SYSFS_FLAG_ATTR; } } - -#if IS_ENABLED(CONFIG_FB_BACKLIGHT) -/* This function generates a linear backlight curve - * - * 0: off - * 1-7: min - * 8-127: linear from min to max - */ -void fb_bl_default_curve(struct fb_info *fb_info, u8 off, u8 min, u8 max) -{ - unsigned int i, flat, count, range = (max - min); - - mutex_lock(&fb_info->bl_curve_mutex); - - fb_info->bl_curve[0] = off; - - for (flat = 1; flat < (FB_BACKLIGHT_LEVELS / 16); ++flat) - fb_info->bl_curve[flat] = min; - - count = FB_BACKLIGHT_LEVELS * 15 / 16; - for (i = 0; i < count; ++i) - fb_info->bl_curve[flat + i] = min + (range * (i + 1) / count); - - mutex_unlock(&fb_info->bl_curve_mutex); -} -EXPORT_SYMBOL_GPL(fb_bl_default_curve); -#endif