drm/tilcdc: Add timeout wait for palette loading to complete

Add timeout wait for palette loadind to complete. We do not want to
hang forever if palette loaded interrupt does not arrive for some
reason.

Signed-off-by: Jyri Sarha <jsarha@ti.com>
Tested-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
index b3edc6d2bf16..f736a8970e8b 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
+++ b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
@@ -125,6 +125,7 @@ static void tilcdc_crtc_load_palette(struct drm_crtc *crtc)
         struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc);
         struct drm_device *dev = crtc->dev;
         struct tilcdc_drm_private *priv = dev->dev_private;
+        int ret;
 
         dma_fb_base = tilcdc_read(dev, LCDC_DMA_FB_BASE_ADDR_0_REG);
         dma_fb_ceiling = tilcdc_read(dev, LCDC_DMA_FB_CEILING_ADDR_0_REG);
@@ -152,7 +153,10 @@ static void tilcdc_crtc_load_palette(struct drm_crtc *crtc)
         tilcdc_clear_irqstatus(dev, 0xffffffff);
         tilcdc_set(dev, LCDC_RASTER_CTRL_REG, LCDC_RASTER_ENABLE);
 
-        wait_for_completion(&tilcdc_crtc->palette_loaded);
+        ret = wait_for_completion_timeout(&tilcdc_crtc->palette_loaded,
+                                          msecs_to_jiffies(50));
+        if (ret == 0)
+                dev_err(dev->dev, "%s: Palette loading timeout", __func__);
 
         /* Disable LCDC DMA and DMA Palette Loaded Interrupt. */
         tilcdc_clear(dev, LCDC_RASTER_CTRL_REG, LCDC_RASTER_ENABLE);