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authorPhilipp Zabel <p.zabel@pengutronix.de>2015-01-08 00:04:04 +0100
committerPhilipp Zabel <p.zabel@pengutronix.de>2015-02-23 17:18:59 +0100
commit89ce4b0f4e7adda75ac7eec6aaa9b3516390cef2 (patch)
treec0e2cabe2de7afdc79eecbc21ed7d1c0a804a363 /drivers/gpu
parentLinux 4.0-rc1 (diff)
downloadlinux-89ce4b0f4e7adda75ac7eec6aaa9b3516390cef2.tar.xz
linux-89ce4b0f4e7adda75ac7eec6aaa9b3516390cef2.zip
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>
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/ipu-v3/ipu-di.c2
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);