From: Tomi Valkeinen <tomi.valkeinen@ti.com>
Date: Fri, 10 Jun 2016 09:50:39 +0000 (+0300)
Subject: drm/omap: fix plane check when crtc is disabled
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=aaf7642e98917fc95c260cbee98d2f426754b265;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

drm/omap: fix plane check when crtc is disabled

I sometimes see:

[drm:drm_framebuffer_remove [drm]] *ERROR* failed to reset crtc ed2a6c00
when fb was deleted: -22

which comes from drm_framebuffer_remove() when it's disabling the crtc
with zeroed drm_mode_set.

The problem in omap_plane_atomic_check() is that it will use those
zeroed fields to verify if the setup is correct.

This patch makes omap_plane_atomic_check() return 0 if the crtc is
disabled.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---

diff --git a/drivers/gpu/drm/omapdrm/omap_plane.c b/drivers/gpu/drm/omapdrm/omap_plane.c
index 0ffd5b930ec0..7bd24185f33c 100644
--- a/drivers/gpu/drm/omapdrm/omap_plane.c
+++ b/drivers/gpu/drm/omapdrm/omap_plane.c
@@ -164,6 +164,9 @@ static int omap_plane_atomic_check(struct drm_plane *plane,
 	if (IS_ERR(crtc_state))
 		return PTR_ERR(crtc_state);
 
+	if (!crtc_state->enable)
+		return 0;
+
 	if (state->crtc_x < 0 || state->crtc_y < 0)
 		return -EINVAL;