[PATCH v2 2/3] arch: Remove struct fb_info from video helpers

Helge Deller deller at gmx.de
Thu Mar 28 04:04:14 PDT 2024


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?

Helge

> is similar in functionality, but can operate on non-fbdev devices.
>
> Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>
> Cc: "James E.J. Bottomley" <James.Bottomley at HansenPartnership.com>
> Cc: Helge Deller <deller at gmx.de>
> Cc: "David S. Miller" <davem at davemloft.net>
> Cc: Andreas Larsson <andreas at gaisler.com>
> Cc: Thomas Gleixner <tglx at linutronix.de>
> Cc: Ingo Molnar <mingo at redhat.com>
> Cc: Borislav Petkov <bp at alien8.de>
> Cc: Dave Hansen <dave.hansen at linux.intel.com>
> Cc: x86 at kernel.org
> Cc: "H. Peter Anvin" <hpa at 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 at 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
>




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