[Intel-gfx] [PATCH 02/21] drm/fb-helper: set fbi->fix.id in fill_info()

[Noralf Trønnes]

Den 26.03.2019 14.19, skrev Daniel Vetter:
> Looking at the oldest/most popular drivers ${driver}drmfb seems to be
> the standard, except i915.ko went with "inteldrmfb". I guess renaming
> that for consistency won't hurt, it definitely confused me when I
> started with kms 10 years ago.
> 
> I hope this never became uapi ... worst case drivers can overwrite it
> after having called fill_info().
> 
> Since subsequent patches change this for some drivers later on in the
> series, here's the exhaustive list of where all fix.id is used:
> - /proc/fb which prints the minor number and fix.id name.
> - per-fb sysfs name file
> - getfix ioctl, which is used by fbset only to print out the name when
> dumping information
> - lots and lots of places in dmesg, anytime anything happens with an
> fbdev really
> 
> I think minimal to 0 chances that changing this will screw up a config
> script or something, since outside of informational message it's not
> used by anything to identify which fbdev maps to which minor. After
> all the last fbset release is from 1999, and that predates even devfs
> I think.
> 
> v2: Rebase and amend commit message, thanks to Ilia for pointing out
> that this needs to be spelled out.
> 
> Cc: Ilia Mirkin <imirkin at alum.mit.edu>
> igned-off-by: Daniel Vetter <daniel.vetter at intel.com>

igned -> Signed

Reviewed-by: Noralf Trønnes <noralf at tronnes.org>

> ---
>  drivers/gpu/drm/drm_fb_helper.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
> index b89d177228e2..e3538c851c58 100644
> --- a/drivers/gpu/drm/drm_fb_helper.c
> +++ b/drivers/gpu/drm/drm_fb_helper.c
> @@ -2129,6 +2129,9 @@ void drm_fb_helper_fill_info(struct fb_info *info,
>  	drm_fb_helper_fill_var(info, fb_helper,
>  			       sizes->fb_width, sizes->fb_height);
>  
> +	snprintf(info->fix.id, sizeof(info->fix.id), "%sdrmfb",
> +		 fb_helper->dev->driver->name);
> +
>  }
>  EXPORT_SYMBOL(drm_fb_helper_fill_info);
>  
> @@ -3190,8 +3193,6 @@ int drm_fb_helper_generic_probe(struct drm_fb_helper *fb_helper,
>  		fbi->fix.smem_start =
>  			page_to_phys(virt_to_page(fbi->screen_buffer));
>  #endif
> -	strcpy(fbi->fix.id, "DRM emulated");
> -
>  	drm_fb_helper_fill_info(fbi, fb_helper, sizes);
>  
>  	if (fb->funcs->dirty) {
>