From e39bf98a91abd5c8fb290f139521dddc3db3c37d Mon Sep 17 00:00:00 2001 From: Paulo Zanoni Date: Sat, 2 Nov 2013 21:07:36 -0700 Subject: [PATCH] drm/i915/bdw: get the correct LCPLL frequency on Broadwell MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit v2: Rebased onto Paulo's MHz->kHz change. v3: Rebased on top of the Haswell pc8+ adjustements. v4: Use the exact 337.5MHz clock, should have been done as part of v2. Reviewed-by: Jani Nikula Signed-off-by: Paulo Zanoni (v1) Reviewed-by: Ville Syrjälä Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_reg.h | 3 +++ drivers/gpu/drm/i915/intel_ddi.c | 25 ++++++++++++++++++------- 2 files changed, 21 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index a4a41f5df469..0b7983b87ce8 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -5315,6 +5315,9 @@ #define LCPLL_PLL_LOCK (1<<30) #define LCPLL_CLK_FREQ_MASK (3<<26) #define LCPLL_CLK_FREQ_450 (0<<26) +#define LCPLL_CLK_FREQ_54O_BDW (1<<26) +#define LCPLL_CLK_FREQ_337_5_BDW (2<<26) +#define LCPLL_CLK_FREQ_675_BDW (3<<26) #define LCPLL_CD_CLOCK_DISABLE (1<<25) #define LCPLL_CD2X_CLOCK_DISABLE (1<<23) #define LCPLL_POWER_DOWN_ALLOW (1<<22) diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c index 0598669f84e8..060add6468ec 100644 --- a/drivers/gpu/drm/i915/intel_ddi.c +++ b/drivers/gpu/drm/i915/intel_ddi.c @@ -1158,18 +1158,29 @@ static void intel_disable_ddi(struct intel_encoder *intel_encoder) int intel_ddi_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(HSW_FUSE_STRAP) & HSW_CDCLK_LIMIT) + } else if (I915_READ(HSW_FUSE_STRAP) & HSW_CDCLK_LIMIT) { return 450000; - else if ((lcpll & LCPLL_CLK_FREQ_MASK) == LCPLL_CLK_FREQ_450) + } else if (freq == LCPLL_CLK_FREQ_450) { return 450000; - else if (IS_ULT(dev_priv->dev)) - return 337500; - else - return 540000; + } 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; + } } void intel_ddi_pll_init(struct drm_device *dev) -- 2.20.1