diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2013-12-09 18:54:16 +0200 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-12-11 23:52:15 +0100 |
| commit | e91e941bd566ae94ed576424c9e8b31bdfc55512 (patch) | |
| tree | ba681ae911ea1a075961a72f19dd27f35a3df109 /drivers/gpu/drm/i915/intel_bios.c | |
| parent | c7721d3266c71b122f7a6c2b40b0800985b53ce0 (diff) | |
| download | blackbird-op-linux-e91e941bd566ae94ed576424c9e8b31bdfc55512.tar.gz blackbird-op-linux-e91e941bd566ae94ed576424c9e8b31bdfc55512.zip | |
drm/i915: Fix 66 MHz LVDS SSC freq for gen2
Store the SSC refclock frequency in kHz to get more accuracy. Currently
we're pretending that 66 MHz is ~66000 kHz, when in fact it is actually
~66667 kHz. By storing the less rounded kHz value we get a much better
accuracy for out pixel clock calculations.
Cc: Bruno Prémont <bonbons@linux-vserver.org>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Tested-by: Bruno Prémont <bonbons@linux-vserver.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_bios.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_bios.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c index e4fba39631a5..f88e5079a3f5 100644 --- a/drivers/gpu/drm/i915/intel_bios.c +++ b/drivers/gpu/drm/i915/intel_bios.c @@ -327,12 +327,12 @@ static int intel_bios_ssc_frequency(struct drm_device *dev, { switch (INTEL_INFO(dev)->gen) { case 2: - return alternate ? 66 : 48; + return alternate ? 66667 : 48000; case 3: case 4: - return alternate ? 100 : 96; + return alternate ? 100000 : 96000; default: - return alternate ? 100 : 120; + return alternate ? 100000 : 120000; } } @@ -796,7 +796,7 @@ init_vbt_defaults(struct drm_i915_private *dev_priv) */ dev_priv->vbt.lvds_ssc_freq = intel_bios_ssc_frequency(dev, !HAS_PCH_SPLIT(dev)); - DRM_DEBUG_KMS("Set default to SSC at %dMHz\n", dev_priv->vbt.lvds_ssc_freq); + DRM_DEBUG_KMS("Set default to SSC at %d kHz\n", dev_priv->vbt.lvds_ssc_freq); for (port = PORT_A; port < I915_MAX_PORTS; port++) { struct ddi_vbt_port_info *info = |
