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path: root/drivers/gpu/drm/radeon/ni_dpm.c
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Diffstat (limited to 'drivers/gpu/drm/radeon/ni_dpm.c')
-rw-r--r--drivers/gpu/drm/radeon/ni_dpm.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/gpu/drm/radeon/ni_dpm.c b/drivers/gpu/drm/radeon/ni_dpm.c
index a7273c01d..2a9d41540 100644
--- a/drivers/gpu/drm/radeon/ni_dpm.c
+++ b/drivers/gpu/drm/radeon/ni_dpm.c
@@ -2239,8 +2239,12 @@ static int ni_populate_mclk_value(struct radeon_device *rdev,
ASIC_INTERNAL_MEMORY_SS, vco_freq)) {
u32 reference_clock = rdev->clock.mpll.reference_freq;
u32 decoded_ref = rv740_get_decoded_reference_divider(dividers.ref_div);
- u32 clk_s = reference_clock * 5 / (decoded_ref * ss.rate);
- u32 clk_v = ss.percentage *
+ u32 clk_s, clk_v;
+
+ if (!decoded_ref)
+ return -EINVAL;
+ clk_s = reference_clock * 5 / (decoded_ref * ss.rate);
+ clk_v = ss.percentage *
(0x4000 * dividers.whole_fb_div + 0x800 * dividers.frac_fb_div) / (clk_s * 625);
mpll_ss1 &= ~CLKV_MASK;