linux-kernel - [PATCH 3/3] drm/panel: jh057n00900: Print error code on all DRM_DEV

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Message-Id: <85e8899f8091c7466283d42a510042ef55882c97.1564132646.git.agx@sigxcpu.org>
Date:   Fri, 26 Jul 2019 11:21:43 +0200
From:   Guido Günther <agx@...xcpu.org>
To:     Guido Günther <agx@...xcpu.org>,
        Purism Kernel Team <kernel@...i.sm>,
        Thierry Reding <thierry.reding@...il.com>,
        Sam Ravnborg <sam@...nborg.org>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [PATCH 3/3] drm/panel: jh057n00900: Print error code on all DRM_DEV_ERROR()s

Most of them had these already but two mere missing. This eases
debugging.

Signed-off-by: Guido Günther <agx@...xcpu.org>
---
 drivers/gpu/drm/panel/panel-rocktech-jh057n00900.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-rocktech-jh057n00900.c b/drivers/gpu/drm/panel/panel-rocktech-jh057n00900.c
index cc89831e30a6..a182ca7de701 100644
--- a/drivers/gpu/drm/panel/panel-rocktech-jh057n00900.c
+++ b/drivers/gpu/drm/panel/panel-rocktech-jh057n00900.c
@@ -127,7 +127,7 @@ static int jh057n_init_sequence(struct jh057n *ctx)
 
 	ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
 	if (ret < 0) {
-		DRM_DEV_ERROR(dev, "Failed to exit sleep mode\n");
+		DRM_DEV_ERROR(dev, "Failed to exit sleep mode: %d\n", ret);
 		return ret;
 	}
 	/* Panel is operational 120 msec after reset */
@@ -355,7 +355,9 @@ static int jh057n_probe(struct mipi_dsi_device *dsi)
 
 	ret = mipi_dsi_attach(dsi);
 	if (ret < 0) {
-		DRM_DEV_ERROR(dev, "mipi_dsi_attach failed. Is host ready?\n");
+		DRM_DEV_ERROR(dev,
+			      "mipi_dsi_attach failed (%d). Is host ready?\n",
+			      ret);
 		drm_panel_remove(&ctx->panel);
 		return ret;
 	}
-- 
2.20.1