linux-kernel - Re: [PATCH v5] staging: fbtft: use dev_of

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Message-ID: <33398025-d294-40df-a33b-9ddfec9c6a4e@suse.de>
Date: Mon, 12 Jan 2026 09:36:38 +0100
From: Thomas Zimmermann <tzimmermann@...e.de>
To: Chintan Patel <chintanlike@...il.com>, linux-fbdev@...r.kernel.org,
 linux-staging@...ts.linux.dev, linux-omap@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
 andy@...nel.org, deller@....de, gregkh@...uxfoundation.org,
 kernel test robot <lkp@...el.com>
Subject: Re: [PATCH v5] staging: fbtft: use dev_of_fbinfo() instead of
 info->dev

Hi

Am 12.01.26 um 02:07 schrieb Chintan Patel:
> This fixes commit
> a06d03f9f238 ("staging: fbtft: Make FB_DEVICE dependency optional")
>
> from my previous v4 series:
> https://patchwork.kernel.org/project/dri-devel/cover/20260107044258.528624-1-chintanlike@gmail.com/
>
> All direct accesses to info->dev or fb_info->dev are replaced with
> dev_of_fbinfo() helper, improving readability and ensuring
> compilation succeeds when CONFIG_FB_DEVICE=n.
>
> Reported-by: kernel test robot <lkp@...el.com>
> Closes: https://lore.kernel.org/oe-kbuild-all/202601110740.Y9XK5HtN-lkp@intel.com
> Signed-off-by: Chintan Patel <chintanlike@...il.com>
> ---
>   drivers/staging/fbtft/fbtft-core.c | 9 ++++++---
>   1 file changed, 6 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/staging/fbtft/fbtft-core.c b/drivers/staging/fbtft/fbtft-core.c
> index 8a5ccc8ae0a1..309e81d7d208 100644
> --- a/drivers/staging/fbtft/fbtft-core.c
> +++ b/drivers/staging/fbtft/fbtft-core.c
> @@ -364,8 +364,9 @@ static int fbtft_fb_setcolreg(unsigned int regno, unsigned int red,
>   {
>   	unsigned int val;
>   	int ret = 1;
> +	struct device *dev = dev_of_fbinfo(info);
>   
> -	dev_dbg(info->dev,
> +	dev_dbg(dev,
>   		"%s(regno=%u, red=0x%X, green=0x%X, blue=0x%X, trans=0x%X)\n",
>   		__func__, regno, red, green, blue, transp);

Rather use fb_dbg() from <linux/fb.h>. It will format the output 
appropriately.

>   
> @@ -389,9 +390,10 @@ static int fbtft_fb_setcolreg(unsigned int regno, unsigned int red,
>   static int fbtft_fb_blank(int blank, struct fb_info *info)
>   {
>   	struct fbtft_par *par = info->par;
> +	struct device *dev = dev_of_fbinfo(info);
>   	int ret = -EINVAL;
>   
> -	dev_dbg(info->dev, "%s(blank=%d)\n",
> +	dev_dbg(dev, "%s(blank=%d)\n",
>   		__func__, blank);
>   
>   	if (!par->fbtftops.blank)
> @@ -739,6 +741,7 @@ int fbtft_register_framebuffer(struct fb_info *fb_info)
>   	char text2[50] = "";
>   	struct fbtft_par *par = fb_info->par;
>   	struct spi_device *spi = par->spi;
> +	struct device *dev = dev_of_fbinfo(fb_info);
>   
>   	/* sanity checks */
>   	if (!par->fbtftops.init_display) {
> @@ -793,7 +796,7 @@ int fbtft_register_framebuffer(struct fb_info *fb_info)
>   	if (spi)
>   		sprintf(text2, ", spi%d.%d at %d MHz", spi->controller->bus_num,
>   			spi_get_chipselect(spi, 0), spi->max_speed_hz / 1000000);
> -	dev_info(fb_info->dev,
> +	dev_info(dev,

fb_info() here.

Best regards
Thomas

>   		 "%s frame buffer, %dx%d, %d KiB video memory%s, fps=%lu%s\n",
>   		 fb_info->fix.id, fb_info->var.xres, fb_info->var.yres,
>   		 fb_info->fix.smem_len >> 10, text1,

-- 
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstr. 146, 90461 Nürnberg, Germany, www.suse.com
GF: Jochen Jaser, Andrew McDonald, Werner Knoblich, (HRB 36809, AG Nürnberg)