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Commit f90ebd9e authored by Jason Wessel's avatar Jason Wessel
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drm_fb_helper: Preserve capability to use atomic kms 



Commit 5349ef31 (drm/fb: fix
FBIOGET/PUT_VSCREENINFO pixel clock handling) changed the logic of
when a pixclock was valid vs invalid.

The atomic kernel mode setting used by the kernel debugger relies upon
the drm_fb_helper_check_var() to always return -EINVAL.  Until a
better solution exists, this behavior will be restored.

CC: David Airlie <airlied@linux.ie>
CC: Jesse Barnes <jbarnes@virtuousgeek.org>
CC: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: default avatarJason Wessel <jason.wessel@windriver.com>
parent c924b934

drivers/gpu/drm/drm_fb_helper.c

+1 −1
Original line number Diff line number Diff line
@@ -685,7 +685,7 @@ int drm_fb_helper_check_var(struct fb_var_screeninfo *var, 
	struct drm_framebuffer *fb = fb_helper->fb;

	int depth;



	if (var->pixclock != 0)

	if (var->pixclock != 0 || in_dbg_master())

		return -EINVAL;



	/* Need to resize the fb object !!! */