diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_display.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 0332d7ca892d..66b39dbaf12c 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -329,6 +329,8 @@ static void vlv_clock(int refclk, intel_clock_t *clock) { clock->m = clock->m1 * clock->m2; clock->p = clock->p1 * clock->p2; + if (WARN_ON(clock->n == 0 || clock->p == 0)) + return; clock->vco = DIV_ROUND_CLOSEST(refclk * clock->m, clock->n); clock->dot = DIV_ROUND_CLOSEST(clock->vco, clock->p); } @@ -430,6 +432,8 @@ static void pineview_clock(int refclk, intel_clock_t *clock) { clock->m = clock->m2 + 2; clock->p = clock->p1 * clock->p2; + if (WARN_ON(clock->n == 0 || clock->p == 0)) + return; clock->vco = DIV_ROUND_CLOSEST(refclk * clock->m, clock->n); clock->dot = DIV_ROUND_CLOSEST(clock->vco, clock->p); } @@ -443,6 +447,8 @@ static void i9xx_clock(int refclk, intel_clock_t *clock) { clock->m = i9xx_dpll_compute_m(clock); clock->p = clock->p1 * clock->p2; + if (WARN_ON(clock->n + 2 == 0 || clock->p == 0)) + return; clock->vco = DIV_ROUND_CLOSEST(refclk * clock->m, clock->n + 2); clock->dot = DIV_ROUND_CLOSEST(clock->vco, clock->p); } |