gpu: ipu-v3: do not divide by zero if the pixel clock is too large

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@pengutronix.de>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/gpu/ipu-v3/ipu-di.c b/drivers/gpu/ipu-v3/ipu-di.c
index b61d6be97602..3ddfb3d0b64d 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);