diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2016-05-13 23:41:24 +0300 |
|---|---|---|
| committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2016-05-23 21:11:12 +0300 |
| commit | ea61791e598e3ddd26578958246c6ea631eeefbb (patch) | |
| tree | 91dc6856888dafe05fa7c1aaa74cb641c645b4d4 /drivers/gpu/drm/i915/intel_dpll_mgr.c | |
| parent | a8ca49345253923059df2663f48e72039095f63e (diff) | |
| download | linux-ea61791e598e3ddd26578958246c6ea631eeefbb.tar.bz2 | |
drm/i915: Actually read out DPLL0 vco on skl from hardware
Currently we're trying to guess which lcpll vco frequency is used
use based on the cdclk. That doesn't work for cdclk==540 since
both vco frequencies can generate a 540 Mhz output. Let's stop
guessing and just read the actual vco frequency from the
hardware.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1463172100-24715-6-git-send-email-ville.syrjala@linux.intel.com
Reviewed-by: Imre Deak <imre.deak@intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_dpll_mgr.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_dpll_mgr.c | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/drivers/gpu/drm/i915/intel_dpll_mgr.c b/drivers/gpu/drm/i915/intel_dpll_mgr.c index 43ba60b3662e..5391ab66b64d 100644 --- a/drivers/gpu/drm/i915/intel_dpll_mgr.c +++ b/drivers/gpu/drm/i915/intel_dpll_mgr.c @@ -1633,14 +1633,8 @@ static void intel_ddi_pll_init(struct drm_device *dev) uint32_t val = I915_READ(LCPLL_CTL); if (IS_SKYLAKE(dev) || IS_KABYLAKE(dev)) { - int cdclk_freq; - - cdclk_freq = dev_priv->display.get_display_clock_speed(dev); - dev_priv->skl_vco_freq = skl_cdclk_get_vco(cdclk_freq); if (skl_sanitize_cdclk(dev_priv)) DRM_DEBUG_KMS("Sanitized cdclk programmed by pre-os\n"); - if (!(I915_READ(LCPLL1_CTL) & LCPLL_PLL_ENABLE)) - DRM_ERROR("LCPLL1 is disabled\n"); } else if (!IS_BROXTON(dev_priv)) { /* * The LCPLL register should be turned on by the BIOS. For now |