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Message-ID: <aSeoB1xf05i4LhCp@r1chard>
Date: Thu, 27 Nov 2025 09:23:19 +0800
From: Richard Lyu <richard.lyu@...e.com>
To: Thomas Zimmermann <tzimmermann@...e.de>, ardb@...nel.org,
javierm@...hat.com, arnd@...db.de, helgaas@...nel.org
Cc: x86@...nel.org, linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org, linux-efi@...r.kernel.org,
loongarch@...ts.linux.dev, linux-riscv@...ts.infradead.org,
dri-devel@...ts.freedesktop.org, linux-hyperv@...r.kernel.org,
linux-pci@...r.kernel.org, linux-fbdev@...r.kernel.org
Subject: Re: [PATCH v3 5/9] sysfb: Pass sysfb_primary_display to devices
Reviewed-by: Richard Lyu <richard.lyu@...e.com>
On 2025/11/26 17:03, Thomas Zimmermann wrote:
> Instead of screen_info, store a copy of sysfb_primary_display as
> device data. Pick it up in drivers. Later changes will add additional
> data to the display info, such as EDID information.
>
> Signed-off-by: Thomas Zimmermann <tzimmermann@...e.de>
> Acked-by: Arnd Bergmann <arnd@...db.de>
> Acked-by: Ard Biesheuvel <ardb@...nel.org>
> ---
> drivers/firmware/sysfb.c | 5 +++--
> drivers/gpu/drm/sysfb/efidrm.c | 9 ++++++---
> drivers/gpu/drm/sysfb/vesadrm.c | 9 ++++++---
> drivers/video/fbdev/efifb.c | 10 ++++++----
> drivers/video/fbdev/vesafb.c | 10 ++++++----
> drivers/video/fbdev/vga16fb.c | 8 +++++---
> 6 files changed, 32 insertions(+), 19 deletions(-)
>
> diff --git a/drivers/firmware/sysfb.c b/drivers/firmware/sysfb.c
> index 1f671f9219b0..8833582c1883 100644
> --- a/drivers/firmware/sysfb.c
> +++ b/drivers/firmware/sysfb.c
> @@ -141,7 +141,8 @@ static struct device *sysfb_parent_dev(const struct screen_info *si)
>
> static __init int sysfb_init(void)
> {
> - struct screen_info *si = &sysfb_primary_display.screen;
> + struct sysfb_display_info *dpy = &sysfb_primary_display;
> + struct screen_info *si = &dpy->screen;
> struct device *parent;
> unsigned int type;
> struct simplefb_platform_data mode;
> @@ -202,7 +203,7 @@ static __init int sysfb_init(void)
>
> sysfb_set_efifb_fwnode(si, pd);
>
> - ret = platform_device_add_data(pd, si, sizeof(*si));
> + ret = platform_device_add_data(pd, dpy, sizeof(*dpy));
> if (ret)
> goto err;
>
> diff --git a/drivers/gpu/drm/sysfb/efidrm.c b/drivers/gpu/drm/sysfb/efidrm.c
> index 1b683d55d6ea..29533ae8fbbf 100644
> --- a/drivers/gpu/drm/sysfb/efidrm.c
> +++ b/drivers/gpu/drm/sysfb/efidrm.c
> @@ -4,7 +4,7 @@
> #include <linux/efi.h>
> #include <linux/limits.h>
> #include <linux/platform_device.h>
> -#include <linux/screen_info.h>
> +#include <linux/sysfb.h>
>
> #include <drm/clients/drm_client_setup.h>
> #include <drm/drm_atomic.h>
> @@ -141,6 +141,7 @@ static const struct drm_mode_config_funcs efidrm_mode_config_funcs = {
> static struct efidrm_device *efidrm_device_create(struct drm_driver *drv,
> struct platform_device *pdev)
> {
> + const struct sysfb_display_info *dpy;
> const struct screen_info *si;
> const struct drm_format_info *format;
> int width, height, stride;
> @@ -160,9 +161,11 @@ static struct efidrm_device *efidrm_device_create(struct drm_driver *drv,
> size_t nformats;
> int ret;
>
> - si = dev_get_platdata(&pdev->dev);
> - if (!si)
> + dpy = dev_get_platdata(&pdev->dev);
> + if (!dpy)
> return ERR_PTR(-ENODEV);
> + si = &dpy->screen;
> +
> if (screen_info_video_type(si) != VIDEO_TYPE_EFI)
> return ERR_PTR(-ENODEV);
>
> diff --git a/drivers/gpu/drm/sysfb/vesadrm.c b/drivers/gpu/drm/sysfb/vesadrm.c
> index 7b7b5ba26317..16fc223f8c5b 100644
> --- a/drivers/gpu/drm/sysfb/vesadrm.c
> +++ b/drivers/gpu/drm/sysfb/vesadrm.c
> @@ -4,7 +4,7 @@
> #include <linux/ioport.h>
> #include <linux/limits.h>
> #include <linux/platform_device.h>
> -#include <linux/screen_info.h>
> +#include <linux/sysfb.h>
>
> #include <drm/clients/drm_client_setup.h>
> #include <drm/drm_atomic.h>
> @@ -391,6 +391,7 @@ static const struct drm_mode_config_funcs vesadrm_mode_config_funcs = {
> static struct vesadrm_device *vesadrm_device_create(struct drm_driver *drv,
> struct platform_device *pdev)
> {
> + const struct sysfb_display_info *dpy;
> const struct screen_info *si;
> const struct drm_format_info *format;
> int width, height, stride;
> @@ -410,9 +411,11 @@ static struct vesadrm_device *vesadrm_device_create(struct drm_driver *drv,
> size_t nformats;
> int ret;
>
> - si = dev_get_platdata(&pdev->dev);
> - if (!si)
> + dpy = dev_get_platdata(&pdev->dev);
> + if (!dpy)
> return ERR_PTR(-ENODEV);
> + si = &dpy->screen;
> +
> if (screen_info_video_type(si) != VIDEO_TYPE_VLFB)
> return ERR_PTR(-ENODEV);
>
> diff --git a/drivers/video/fbdev/efifb.c b/drivers/video/fbdev/efifb.c
> index 0e1bd3dba255..47ebc0107209 100644
> --- a/drivers/video/fbdev/efifb.c
> +++ b/drivers/video/fbdev/efifb.c
> @@ -15,7 +15,7 @@
> #include <linux/fb.h>
> #include <linux/platform_device.h>
> #include <linux/printk.h>
> -#include <linux/screen_info.h>
> +#include <linux/sysfb.h>
> #include <video/vga.h>
> #include <asm/efi.h>
> #include <drm/drm_utils.h> /* For drm_get_panel_orientation_quirk */
> @@ -345,6 +345,7 @@ ATTRIBUTE_GROUPS(efifb);
>
> static int efifb_probe(struct platform_device *dev)
> {
> + struct sysfb_display_info *dpy;
> struct screen_info *si;
> struct fb_info *info;
> struct efifb_par *par;
> @@ -360,10 +361,11 @@ static int efifb_probe(struct platform_device *dev)
> * driver. We get a copy of the attached screen_info, so that we can
> * modify its values without affecting later drivers.
> */
> - si = dev_get_platdata(&dev->dev);
> - if (!si)
> + dpy = dev_get_platdata(&dev->dev);
> + if (!dpy)
> return -ENODEV;
> - si = devm_kmemdup(&dev->dev, si, sizeof(*si), GFP_KERNEL);
> +
> + si = devm_kmemdup(&dev->dev, &dpy->screen, sizeof(*si), GFP_KERNEL);
> if (!si)
> return -ENOMEM;
>
> diff --git a/drivers/video/fbdev/vesafb.c b/drivers/video/fbdev/vesafb.c
> index f135033c22fb..f84f4db244bf 100644
> --- a/drivers/video/fbdev/vesafb.c
> +++ b/drivers/video/fbdev/vesafb.c
> @@ -20,7 +20,7 @@
> #include <linux/ioport.h>
> #include <linux/init.h>
> #include <linux/platform_device.h>
> -#include <linux/screen_info.h>
> +#include <linux/sysfb.h>
> #include <linux/io.h>
>
> #include <video/vga.h>
> @@ -243,6 +243,7 @@ static int vesafb_setup(char *options)
>
> static int vesafb_probe(struct platform_device *dev)
> {
> + struct sysfb_display_info *dpy;
> struct screen_info *si;
> struct fb_info *info;
> struct vesafb_par *par;
> @@ -257,10 +258,11 @@ static int vesafb_probe(struct platform_device *dev)
> * driver. We get a copy of the attached screen_info, so that we can
> * modify its values without affecting later drivers.
> */
> - si = dev_get_platdata(&dev->dev);
> - if (!si)
> + dpy = dev_get_platdata(&dev->dev);
> + if (!dpy)
> return -ENODEV;
> - si = devm_kmemdup(&dev->dev, si, sizeof(*si), GFP_KERNEL);
> +
> + si = devm_kmemdup(&dev->dev, &dpy->screen, sizeof(*si), GFP_KERNEL);
> if (!si)
> return -ENOMEM;
>
> diff --git a/drivers/video/fbdev/vga16fb.c b/drivers/video/fbdev/vga16fb.c
> index 6b81337a4909..22085d3668e8 100644
> --- a/drivers/video/fbdev/vga16fb.c
> +++ b/drivers/video/fbdev/vga16fb.c
> @@ -21,7 +21,7 @@
> #include <linux/ioport.h>
> #include <linux/init.h>
> #include <linux/platform_device.h>
> -#include <linux/screen_info.h>
> +#include <linux/sysfb.h>
>
> #include <asm/io.h>
> #include <video/vga.h>
> @@ -1305,15 +1305,17 @@ static const struct fb_ops vga16fb_ops = {
>
> static int vga16fb_probe(struct platform_device *dev)
> {
> + struct sysfb_display_info *dpy;
> struct screen_info *si;
> struct fb_info *info;
> struct vga16fb_par *par;
> int i;
> int ret = 0;
>
> - si = dev_get_platdata(&dev->dev);
> - if (!si)
> + dpy = dev_get_platdata(&dev->dev);
> + if (!dpy)
> return -ENODEV;
> + si = &dpy->screen;
>
> ret = check_mode_supported(si);
> if (ret)
> --
> 2.51.1
>
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