From ad13d6048f5002f1c5ab21c71a5ee136a2d8e889 Mon Sep 17 00:00:00 2001 From: Damien Lespiau Date: Tue, 29 Jul 2014 18:06:24 +0100 Subject: [PATCH] drm/i915: Split the CDCLK retrieval per-platform This is only going to get worse, so split it now to avoid adding more cases to the if/else ladder. Suggested-by: Daniel Vetter Signed-off-by: Damien Lespiau Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_ddi.c | 55 +++++++++++++++++++++++++++------------- 1 file changed, 38 insertions(+), 17 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c index eb8e494..b5870fd 100644 --- a/drivers/gpu/drm/i915/intel_ddi.c +++ b/drivers/gpu/drm/i915/intel_ddi.c @@ -1192,31 +1192,52 @@ static void intel_disable_ddi(struct intel_encoder *intel_encoder) } } -int intel_ddi_get_cdclk_freq(struct drm_i915_private *dev_priv) +static int bdw_get_cdclk_freq(struct drm_i915_private *dev_priv) +{ + uint32_t lcpll = I915_READ(LCPLL_CTL); + uint32_t freq = lcpll & LCPLL_CLK_FREQ_MASK; + + if (lcpll & LCPLL_CD_SOURCE_FCLK) + return 800000; + else if (I915_READ(FUSE_STRAP) & HSW_CDCLK_LIMIT) + return 450000; + else if (freq == LCPLL_CLK_FREQ_450) + return 450000; + else if (freq == LCPLL_CLK_FREQ_54O_BDW) + return 540000; + else if (freq == LCPLL_CLK_FREQ_337_5_BDW) + return 337500; + else + return 675000; +} + +static int hsw_get_cdclk_freq(struct drm_i915_private *dev_priv) { struct drm_device *dev = dev_priv->dev; uint32_t lcpll = I915_READ(LCPLL_CTL); uint32_t freq = lcpll & LCPLL_CLK_FREQ_MASK; - if (lcpll & LCPLL_CD_SOURCE_FCLK) { + if (lcpll & LCPLL_CD_SOURCE_FCLK) return 800000; - } else if (I915_READ(FUSE_STRAP) & HSW_CDCLK_LIMIT) { + else if (I915_READ(FUSE_STRAP) & HSW_CDCLK_LIMIT) return 450000; - } else if (freq == LCPLL_CLK_FREQ_450) { + else if (freq == LCPLL_CLK_FREQ_450) return 450000; - } else if (IS_HASWELL(dev)) { - if (IS_ULT(dev)) - return 337500; - else - return 540000; - } else { - if (freq == LCPLL_CLK_FREQ_54O_BDW) - return 540000; - else if (freq == LCPLL_CLK_FREQ_337_5_BDW) - return 337500; - else - return 675000; - } + else if (IS_ULT(dev)) + return 337500; + else + return 540000; +} + +int intel_ddi_get_cdclk_freq(struct drm_i915_private *dev_priv) +{ + struct drm_device *dev = dev_priv->dev; + + if (IS_BROADWELL(dev)) + return bdw_get_cdclk_freq(dev_priv); + + /* Haswell */ + return hsw_get_cdclk_freq(dev_priv); } static void hsw_ddi_pll_enable(struct drm_i915_private *dev_priv, -- 2.7.4