diff options
| -rw-r--r-- | drivers/gpu/drm/i915/intel_crt.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c index 61eaac2..583cae7 100644 --- a/drivers/gpu/drm/i915/intel_crt.c +++ b/drivers/gpu/drm/i915/intel_crt.c @@ -218,18 +218,26 @@ intel_crt_mode_valid(struct drm_connector *connector, { struct drm_device *dev = connector->dev; int max_dotclk = to_i915(dev)->max_dotclk_freq; + int max_clock; - int max_clock = 0; if (mode->flags & DRM_MODE_FLAG_DBLSCAN) return MODE_NO_DBLESCAN; if (mode->clock < 25000) return MODE_CLOCK_LOW; - if (IS_GEN2(dev)) - max_clock = 350000; - else + if (HAS_PCH_LPT(dev)) + max_clock = 180000; + else if (IS_VALLEYVIEW(dev)) + /* + * 270 MHz due to current DPLL limits, + * DAC limit supposedly 355 MHz. + */ + max_clock = 270000; + else if (IS_GEN3(dev) || IS_GEN4(dev)) max_clock = 400000; + else + max_clock = 350000; if (mode->clock > max_clock) return MODE_CLOCK_HIGH; |