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drm/framebuffer: Use actual bpp for DRM_IOCTL_MODE_GETFB

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When userspace queries the properties of a frame buffer, the number of
bits per pixel is derived from the deprecated drm_format_info.cpp[]
field, which does not take into account block sizes.

Fix this by using the actual number of bits per pixel instead.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/b612780feef200b7f914a674db28ed227e7cdc64.1657294931.git.geert@linux-m68k.org
This commit is contained in:
Geert Uytterhoeven 2022-07-08 20:20:49 +02:00 committed by Sam Ravnborg
parent 356d2c8e76
commit 4c59b0805e
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/drm_framebuffer.c
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@ -530,7 +530,7 @@ int drm_mode_getfb(struct drm_device *dev,
r->height = fb->height;
r->width = fb->width;
r->depth = fb->format->depth;
r->bpp = fb->format->cpp[0] * 8;
r->bpp = drm_format_info_bpp(fb->format, 0);
r->pitch = fb->pitches[0];
/* GET_FB() is an unprivileged ioctl so we must not return a