From: Michel Dänzer Date: Thu, 23 Mar 2017 08:53:26 +0000 (+0900) Subject: drm/fb-helper: Allow var->x/yres(_virtual) < fb->width/height again X-Git-Tag: v4.10.12~54 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d38b12ab7b054912bf2df3d48810f305d2914632;p=thirdparty%2Fkernel%2Fstable.git drm/fb-helper: Allow var->x/yres(_virtual) < fb->width/height again commit 12ffed96d4369f086261ba2ee734fa8c932d7f55 upstream. Otherwise this can also prevent modesets e.g. for switching VTs, when multiple monitors with different native resolutions are connected. The depths must match though, so keep the != test for that. Also update the DRM_DEBUG output to be slightly more accurate, this doesn't only affect requests from userspace. Bugzilla: https://bugs.freedesktop.org/99841 Fixes: 865afb11949e ("drm/fb-helper: reject any changes to the fbdev") Signed-off-by: Michel Dänzer Reviewed-by: Daniel Stone Signed-off-by: Daniel Vetter Link: http://patchwork.freedesktop.org/patch/msgid/20170323085326.20185-1-michel@daenzer.net Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index ad531126667c3..e3da97b409bcf 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -1256,9 +1256,9 @@ int drm_fb_helper_check_var(struct fb_var_screeninfo *var, * to KMS, hence fail if different settings are requested. */ if (var->bits_per_pixel != fb->bits_per_pixel || - var->xres != fb->width || var->yres != fb->height || - var->xres_virtual != fb->width || var->yres_virtual != fb->height) { - DRM_DEBUG("fb userspace requested width/height/bpp different than current fb " + var->xres > fb->width || var->yres > fb->height || + var->xres_virtual > fb->width || var->yres_virtual > fb->height) { + DRM_DEBUG("fb requested width/height/bpp can't fit in current fb " "request %dx%d-%d (virtual %dx%d) > %dx%d-%d\n", var->xres, var->yres, var->bits_per_pixel, var->xres_virtual, var->yres_virtual,