Messages in this thread | | | Date | Thu, 28 Mar 2024 14:33:00 +0100 | Subject | Re: [PATCH v2 2/3] arch: Remove struct fb_info from video helpers | From | Thomas Zimmermann <> |
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Hi
Am 28.03.24 um 12:04 schrieb Helge Deller: > On 3/27/24 21:41, Thomas Zimmermann wrote: >> The per-architecture video helpers do not depend on struct fb_info >> or anything else from fbdev. Remove it from the interface and replace >> fb_is_primary_device() with video_is_primary_device(). The new helper > > Since you rename this function, wouldn't something similar to > > device_is_primary_display() > or > device_is_primary_console() > or > is_primary_graphics_device() > or > is_primary_display_device() > > be a better name?
The video_ prefix is there to signal that the code is part of the video subsystem.
But there's too much code that tried to figure out a default video device. So I actually have different plans for this function. I'd like to replace it with a helper that returns the default device instead of just testing for it. Sample code for x86 is already in vgaarb.c. [1] The function's name would then be video_default_device() and return the appropriate struct device*. video_is_primary device() will be removed. This rename here is the easiest step towards the new helper. Ok?
Best regards Thomas
[1] https://elixir.bootlin.com/linux/v6.8/source/drivers/pci/vgaarb.c#L559
> > Helge > >> is similar in functionality, but can operate on non-fbdev devices. >> >> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> >> Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com> >> Cc: Helge Deller <deller@gmx.de> >> Cc: "David S. Miller" <davem@davemloft.net> >> Cc: Andreas Larsson <andreas@gaisler.com> >> Cc: Thomas Gleixner <tglx@linutronix.de> >> Cc: Ingo Molnar <mingo@redhat.com> >> Cc: Borislav Petkov <bp@alien8.de> >> Cc: Dave Hansen <dave.hansen@linux.intel.com> >> Cc: x86@kernel.org >> Cc: "H. Peter Anvin" <hpa@zytor.com> >> --- >> arch/parisc/include/asm/fb.h | 8 +++++--- >> arch/parisc/video/fbdev.c | 9 +++++---- >> arch/sparc/include/asm/fb.h | 7 ++++--- >> arch/sparc/video/fbdev.c | 17 ++++++++--------- >> arch/x86/include/asm/fb.h | 8 +++++--- >> arch/x86/video/fbdev.c | 18 +++++++----------- >> drivers/video/fbdev/core/fbcon.c | 2 +- >> include/asm-generic/fb.h | 11 ++++++----- >> 8 files changed, 41 insertions(+), 39 deletions(-) >> >> diff --git a/arch/parisc/include/asm/fb.h b/arch/parisc/include/asm/fb.h >> index 658a8a7dc5312..ed2a195a3e762 100644 >> --- a/arch/parisc/include/asm/fb.h >> +++ b/arch/parisc/include/asm/fb.h >> @@ -2,11 +2,13 @@ >> #ifndef _ASM_FB_H_ >> #define _ASM_FB_H_ >> >> -struct fb_info; >> +#include <linux/types.h> >> + >> +struct device; >> >> #if defined(CONFIG_STI_CORE) >> -int fb_is_primary_device(struct fb_info *info); >> -#define fb_is_primary_device fb_is_primary_device >> +bool video_is_primary_device(struct device *dev); >> +#define video_is_primary_device video_is_primary_device >> #endif >> >> #include <asm-generic/fb.h> >> diff --git a/arch/parisc/video/fbdev.c b/arch/parisc/video/fbdev.c >> index e4f8ac99fc9e0..540fa0c919d59 100644 >> --- a/arch/parisc/video/fbdev.c >> +++ b/arch/parisc/video/fbdev.c >> @@ -5,12 +5,13 @@ >> * Copyright (C) 2001-2002 Thomas Bogendoerfer >> <tsbogend@alpha.franken.de> >> */ >> >> -#include <linux/fb.h> >> #include <linux/module.h> >> >> #include <video/sticore.h> >> >> -int fb_is_primary_device(struct fb_info *info) >> +#include <asm/fb.h> >> + >> +bool video_is_primary_device(struct device *dev) >> { >> struct sti_struct *sti; >> >> @@ -21,6 +22,6 @@ int fb_is_primary_device(struct fb_info *info) >> return true; >> >> /* return true if it's the default built-in framebuffer driver */ >> - return (sti->dev == info->device); >> + return (sti->dev == dev); >> } >> -EXPORT_SYMBOL(fb_is_primary_device); >> +EXPORT_SYMBOL(video_is_primary_device); >> diff --git a/arch/sparc/include/asm/fb.h b/arch/sparc/include/asm/fb.h >> index 24440c0fda490..07f0325d6921c 100644 >> --- a/arch/sparc/include/asm/fb.h >> +++ b/arch/sparc/include/asm/fb.h >> @@ -3,10 +3,11 @@ >> #define _SPARC_FB_H_ >> >> #include <linux/io.h> >> +#include <linux/types.h> >> >> #include <asm/page.h> >> >> -struct fb_info; >> +struct device; >> >> #ifdef CONFIG_SPARC32 >> static inline pgprot_t pgprot_framebuffer(pgprot_t prot, >> @@ -18,8 +19,8 @@ static inline pgprot_t pgprot_framebuffer(pgprot_t >> prot, >> #define pgprot_framebuffer pgprot_framebuffer >> #endif >> >> -int fb_is_primary_device(struct fb_info *info); >> -#define fb_is_primary_device fb_is_primary_device >> +bool video_is_primary_device(struct device *dev); >> +#define video_is_primary_device video_is_primary_device >> >> static inline void fb_memcpy_fromio(void *to, const volatile void >> __iomem *from, size_t n) >> { >> diff --git a/arch/sparc/video/fbdev.c b/arch/sparc/video/fbdev.c >> index bff66dd1909a4..e46f0499c2774 100644 >> --- a/arch/sparc/video/fbdev.c >> +++ b/arch/sparc/video/fbdev.c >> @@ -1,26 +1,25 @@ >> // SPDX-License-Identifier: GPL-2.0 >> >> #include <linux/console.h> >> -#include <linux/fb.h> >> +#include <linux/device.h> >> #include <linux/module.h> >> >> +#include <asm/fb.h> >> #include <asm/prom.h> >> >> -int fb_is_primary_device(struct fb_info *info) >> +bool video_is_primary_device(struct device *dev) >> { >> - struct device *dev = info->device; >> - struct device_node *node; >> + struct device_node *node = dev->of_node; >> >> if (console_set_on_cmdline) >> - return 0; >> + return false; >> >> - node = dev->of_node; >> if (node && node == of_console_device) >> - return 1; >> + return true; >> >> - return 0; >> + return false; >> } >> -EXPORT_SYMBOL(fb_is_primary_device); >> +EXPORT_SYMBOL(video_is_primary_device); >> >> MODULE_DESCRIPTION("Sparc fbdev helpers"); >> MODULE_LICENSE("GPL"); >> diff --git a/arch/x86/include/asm/fb.h b/arch/x86/include/asm/fb.h >> index c3b9582de7efd..999db33792869 100644 >> --- a/arch/x86/include/asm/fb.h >> +++ b/arch/x86/include/asm/fb.h >> @@ -2,17 +2,19 @@ >> #ifndef _ASM_X86_FB_H >> #define _ASM_X86_FB_H >> >> +#include <linux/types.h> >> + >> #include <asm/page.h> >> >> -struct fb_info; >> +struct device; >> >> pgprot_t pgprot_framebuffer(pgprot_t prot, >> unsigned long vm_start, unsigned long vm_end, >> unsigned long offset); >> #define pgprot_framebuffer pgprot_framebuffer >> >> -int fb_is_primary_device(struct fb_info *info); >> -#define fb_is_primary_device fb_is_primary_device >> +bool video_is_primary_device(struct device *dev); >> +#define video_is_primary_device video_is_primary_device >> >> #include <asm-generic/fb.h> >> >> diff --git a/arch/x86/video/fbdev.c b/arch/x86/video/fbdev.c >> index 1dd6528cc947c..4d87ce8e257fe 100644 >> --- a/arch/x86/video/fbdev.c >> +++ b/arch/x86/video/fbdev.c >> @@ -7,7 +7,6 @@ >> * >> */ >> >> -#include <linux/fb.h> >> #include <linux/module.h> >> #include <linux/pci.h> >> #include <linux/vgaarb.h> >> @@ -25,20 +24,17 @@ pgprot_t pgprot_framebuffer(pgprot_t prot, >> } >> EXPORT_SYMBOL(pgprot_framebuffer); >> >> -int fb_is_primary_device(struct fb_info *info) >> +bool video_is_primary_device(struct device *dev) >> { >> - struct device *device = info->device; >> - struct pci_dev *pci_dev; >> + struct pci_dev *pdev; >> >> - if (!device || !dev_is_pci(device)) >> - return 0; >> + if (!dev_is_pci(dev)) >> + return false; >> >> - pci_dev = to_pci_dev(device); >> + pdev = to_pci_dev(dev); >> >> - if (pci_dev == vga_default_device()) >> - return 1; >> - return 0; >> + return (pdev == vga_default_device()); >> } >> -EXPORT_SYMBOL(fb_is_primary_device); >> +EXPORT_SYMBOL(video_is_primary_device); >> >> MODULE_LICENSE("GPL"); >> diff --git a/drivers/video/fbdev/core/fbcon.c >> b/drivers/video/fbdev/core/fbcon.c >> index 46823c2e2ba12..85c5c8cbc680a 100644 >> --- a/drivers/video/fbdev/core/fbcon.c >> +++ b/drivers/video/fbdev/core/fbcon.c >> @@ -2939,7 +2939,7 @@ void fbcon_remap_all(struct fb_info *info) >> static void fbcon_select_primary(struct fb_info *info) >> { >> if (!map_override && primary_device == -1 && >> - fb_is_primary_device(info)) { >> + video_is_primary_device(info->device)) { >> int i; >> >> printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n", >> diff --git a/include/asm-generic/fb.h b/include/asm-generic/fb.h >> index 6ccabb400aa66..4788c1e1c6bc0 100644 >> --- a/include/asm-generic/fb.h >> +++ b/include/asm-generic/fb.h >> @@ -10,8 +10,9 @@ >> #include <linux/io.h> >> #include <linux/mm_types.h> >> #include <linux/pgtable.h> >> +#include <linux/types.h> >> >> -struct fb_info; >> +struct device; >> >> #ifndef pgprot_framebuffer >> #define pgprot_framebuffer pgprot_framebuffer >> @@ -23,11 +24,11 @@ static inline pgprot_t >> pgprot_framebuffer(pgprot_t prot, >> } >> #endif >> >> -#ifndef fb_is_primary_device >> -#define fb_is_primary_device fb_is_primary_device >> -static inline int fb_is_primary_device(struct fb_info *info) >> +#ifndef video_is_primary_device >> +#define video_is_primary_device video_is_primary_device >> +static inline bool video_is_primary_device(struct device *dev) >> { >> - return 0; >> + return false; >> } >> #endif >> >
-- -- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Frankenstrasse 146, 90461 Nuernberg, Germany GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman HRB 36809 (AG Nuernberg)
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