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Diffstat (limited to 'drivers/gpu/drm/i915/intel_display.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 251a095acce..ac3ee2cee4b 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -5275,6 +5275,10 @@ static int valleyview_get_display_clock_speed(struct drm_device *dev) divider = val & DISPLAY_FREQUENCY_VALUES; + WARN((val & DISPLAY_FREQUENCY_STATUS) != + (divider << DISPLAY_FREQUENCY_STATUS_SHIFT), + "cdclk change in progress\n"); + return DIV_ROUND_CLOSEST(vco << 1, divider + 1); } |