Patch "drm/fb-helper: Allow var->x/yres(_virtual) < fb->width/height again" has been added to the 4.10-stable tree

This is a note to let you know that I've just added the patch titled

    drm/fb-helper: Allow var->x/yres(_virtual) < fb->width/height again

to the 4.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
drm-fb-helper-allow-var-x-yres-_virtual-fb-width-height-again.patch
and it can be found in the queue-4.10 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: =?UTF-8?q?Michel=20D=C3=A4nzer?= <[email protected]>
Date: Thu, 23 Mar 2017 17:53:26 +0900
Subject: drm/fb-helper: Allow var->x/yres(_virtual) < fb->width/height again
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From: Michel Dänzer <[email protected]>

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

---
 drivers/gpu/drm/drm_fb_helper.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

@@ -1256,9 +1256,9 @@ int drm_fb_helper_check_var(struct fb_va
 	 * 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,

Patches currently in stable-queue which might be from [email protected] are

queue-4.10/drm-fb-helper-allow-var-x-yres-_virtual-fb-width-height-again.patch