drm/stm: ltdc: use DRM_WARN for fifo & transfer error messages

Use DRM_WARN() instead of DRM_DEBUG_DRIVER() to better
inform the user in case of fifo underruns or
transfer errors.

Signed-off-by: Philippe Cornu <philippe.cornu@st.com>
Acked-by: Philippe Cornu <philippe.cornu@st.com>
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1553874548-31366-1-git-send-email-yannick.fertre@st.com

diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c
index 9b4883bdbf4fd17a72fa8dc1a170c29094d0025e..e92f660fedd3835cefcc189228c299049886ad35 100644 (file)
--- a/drivers/gpu/drm/stm/ltdc.c
+++ b/drivers/gpu/drm/stm/ltdc.c
@@ -822,11 +822,11 @@ static void ltdc_plane_atomic_update(struct drm_plane *plane,
 
        mutex_lock(&ldev->err_lock);
        if (ldev->error_status & ISR_FUIF) {
-               DRM_DEBUG_DRIVER("Fifo underrun\n");
+               DRM_WARN("ltdc fifo underrun: please verify display mode\n");
                ldev->error_status &= ~ISR_FUIF;
        }
        if (ldev->error_status & ISR_TERRIF) {
-               DRM_DEBUG_DRIVER("Transfer error\n");
+               DRM_WARN("ltdc transfer error\n");
                ldev->error_status &= ~ISR_TERRIF;
        }
        mutex_unlock(&ldev->err_lock);