[PATCHv2 11/31] drm/omap: print an error if display enable fails

[Tomi Valkeinen]

If the panel's enable fails, omap_encoder silently ignores the failure.
omapdrm should really handle the failure, but unfortunately the whole
encoder enable codepath is expected to always succeed.

So for now, catch the enable failure and print an error.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen at ti.com>
---
 drivers/gpu/drm/omapdrm/omap_encoder.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/omapdrm/omap_encoder.c b/drivers/gpu/drm/omapdrm/omap_encoder.c
index 61714e9670ae..ae347cc19f01 100644
--- a/drivers/gpu/drm/omapdrm/omap_encoder.c
+++ b/drivers/gpu/drm/omapdrm/omap_encoder.c
@@ -139,11 +139,15 @@ static void omap_encoder_enable(struct drm_encoder *encoder)
 	struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
 	struct omap_dss_device *dssdev = omap_encoder->dssdev;
 	struct omap_dss_driver *dssdrv = dssdev->driver;
+	int r;
 
 	omap_encoder_update(encoder, omap_crtc_channel(encoder->crtc),
 			    omap_crtc_timings(encoder->crtc));
 
-	dssdrv->enable(dssdev);
+	r = dssdrv->enable(dssdev);
+	if (r)
+		dev_err(encoder->dev->dev, "Failed to enable display '%s': %d\n",
+			dssdev->name, r);
 }
 
 static int omap_encoder_atomic_check(struct drm_encoder *encoder,
-- 
2.5.0