[PATCH 1/3] gpu: ipu-v3: do not divide by zero if the pixel clock is too large

[Philipp Zabel]

Even if an unsupported mode with a pixel clock larger than two times the
264 MHz IPU HSP clock is set, don't divide by zero.

Signed-off-by: Philipp Zabel <p.zabel at pengutronix.de>
---
 drivers/gpu/ipu-v3/ipu-di.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/ipu-v3/ipu-di.c b/drivers/gpu/ipu-v3/ipu-di.c
index b61d6be..3ddfb3d 100644
--- a/drivers/gpu/ipu-v3/ipu-di.c
+++ b/drivers/gpu/ipu-v3/ipu-di.c
@@ -459,6 +459,8 @@ static void ipu_di_config_clock(struct ipu_di *di,
 
 		clkrate = clk_get_rate(di->clk_ipu);
 		div = DIV_ROUND_CLOSEST(clkrate, sig->mode.pixelclock);
+		if (div == 0)
+			div = 1;
 		rate = clkrate / div;
 
 		error = rate / (sig->mode.pixelclock / 1000);
-- 
2.1.4