drm/tilcdc: Add prints on sync lost and FIFO underrun interrupts

Add ratelimited prints on sync lost and FIFO underrun interrupts.

Signed-off-by: Jyri Sarha <jsarha@ti.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

2 files changed, 10 insertions, 2 deletions

diff --git a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
index b1df04625f50..5ee22c6b37e8 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
+++ b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
@@ -717,6 +717,14 @@ irqreturn_t tilcdc_crtc_irq(struct drm_crtc *crtc)
                 tilcdc_write(dev, LCDC_END_OF_INT_IND_REG, 0);
         }
 
+        if (stat & LCDC_SYNC_LOST)
+                dev_err_ratelimited(dev->dev, "%s(0x%08x): Sync lost",
+                                    __func__, stat);
+
+        if (stat & LCDC_FIFO_UNDERFLOW)
+                dev_err_ratelimited(dev->dev, "%s(0x%08x): FIFO underfow",
+                                    __func__, stat);
+
         return IRQ_HANDLED;
 }
 
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_drv.c b/drivers/gpu/drm/tilcdc/tilcdc_drv.c
index d96083d62e11..41ec890c4bca 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_drv.c
+++ b/drivers/gpu/drm/tilcdc/tilcdc_drv.c
@@ -382,7 +382,7 @@ static int tilcdc_irq_postinstall(struct drm_device *dev)
                 tilcdc_write(dev, LCDC_INT_ENABLE_SET_REG,
                            LCDC_V2_UNDERFLOW_INT_ENA |
                            LCDC_V2_END_OF_FRAME0_INT_ENA |
-                           LCDC_FRAME_DONE);
+                           LCDC_FRAME_DONE | LCDC_SYNC_LOST);
         }
 
         return 0;
@@ -401,7 +401,7 @@ static void tilcdc_irq_uninstall(struct drm_device *dev)
                 tilcdc_write(dev, LCDC_INT_ENABLE_CLR_REG,
                         LCDC_V2_UNDERFLOW_INT_ENA | LCDC_V2_PL_INT_ENA |
                         LCDC_V2_END_OF_FRAME0_INT_ENA |
-                        LCDC_FRAME_DONE);
+                        LCDC_FRAME_DONE | LCDC_SYNC_LOST);
         }
 }