diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_display.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 27 |
1 files changed, 25 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 45e587496886..d0d042495dc7 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -7411,6 +7411,26 @@ static int i945_get_display_clock_speed(struct drm_i915_private *dev_priv) return 400000; } +static int i945gm_get_display_clock_speed(struct drm_i915_private *dev_priv) +{ + struct pci_dev *pdev = dev_priv->drm.pdev; + u16 gcfgc = 0; + + pci_read_config_word(pdev, GCFGC, &gcfgc); + + if (gcfgc & GC_LOW_FREQUENCY_ENABLE) + return 133333; + else { + switch (gcfgc & GC_DISPLAY_CLOCK_MASK) { + case GC_DISPLAY_CLOCK_333_320_MHZ: + return 320000; + default: + case GC_DISPLAY_CLOCK_190_200_MHZ: + return 200000; + } + } +} + static int i915_get_display_clock_speed(struct drm_i915_private *dev_priv) { return 333333; @@ -7457,7 +7477,7 @@ static int i915gm_get_display_clock_speed(struct drm_i915_private *dev_priv) return 133333; else { switch (gcfgc & GC_DISPLAY_CLOCK_MASK) { - case GC_DISPLAY_CLOCK_333_MHZ: + case GC_DISPLAY_CLOCK_333_320_MHZ: return 333333; default: case GC_DISPLAY_CLOCK_190_200_MHZ: @@ -16268,9 +16288,12 @@ void intel_init_display_hooks(struct drm_i915_private *dev_priv) else if (IS_I915G(dev_priv)) dev_priv->display.get_display_clock_speed = i915_get_display_clock_speed; - else if (IS_I945GM(dev_priv) || IS_I845G(dev_priv)) + else if (IS_I845G(dev_priv)) dev_priv->display.get_display_clock_speed = i9xx_misc_get_display_clock_speed; + else if (IS_I945GM(dev_priv)) + dev_priv->display.get_display_clock_speed = + i945gm_get_display_clock_speed; else if (IS_I915GM(dev_priv)) dev_priv->display.get_display_clock_speed = i915gm_get_display_clock_speed; |