linux-kernel - [PATCH v5 01/10] drm/atomic: Print debug message on atomic check failure

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Message-Id: <20180402224800.16080-2-lyude@redhat.com>
Date:   Mon,  2 Apr 2018 18:47:37 -0400
From:   Lyude Paul <lyude@...hat.com>
To:     intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org
Cc:     Manasi Navare <manasi.d.navare@...el.com>,
        Ville Syrjälä 
        <ville.syrjala@...ux.intel.com>,
        Gustavo Padovan <gustavo@...ovan.org>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Sean Paul <seanpaul@...omium.org>,
        David Airlie <airlied@...ux.ie>, linux-kernel@...r.kernel.org
Subject: [PATCH v5 01/10] drm/atomic: Print debug message on atomic check failure

Does what it says on the label, it's a little confusing debugging atomic
check failures otherwise.

Cc: Manasi Navare <manasi.d.navare@...el.com>
Cc: Ville Syrjälä <ville.syrjala@...ux.intel.com>
Signed-off-by: Lyude Paul <lyude@...hat.com>
---
 drivers/gpu/drm/drm_atomic.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index 7d25c42f22db..972a7e9634ab 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -1705,8 +1705,11 @@ int drm_atomic_check_only(struct drm_atomic_state *state)
 	if (config->funcs->atomic_check)
 		ret = config->funcs->atomic_check(state->dev, state);
 
-	if (ret)
+	if (ret) {
+		DRM_DEBUG_ATOMIC("atomic driver check for %p failed: %d\n",
+				 state, ret);
 		return ret;
+	}
 
 	if (!state->allow_modeset) {
 		for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
-- 
2.14.3