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>
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
index b3edc6d..f736a89 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
+++ b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
@@ -125,6 +125,7 @@
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 @@
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);