From a11b07039de9e3866bf479f53f7f9db4923cd1c6 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Wed, 9 Apr 2014 13:28:57 +0300 Subject: [PATCH] drm/i915/chv: Fix CHV PLL state tracking MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Setup the pipe config dpll state correctly for CHV. Also add a assert_pipe_disabled() to chv_disable_pll(), and program the DPLL_MD registers in chv_enable_pll(). Signed-off-by: Ville Syrjälä Reviewed-by: Mika Kuoppala Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_display.c | 41 ++++++++++++++++++---------- 1 file changed, 26 insertions(+), 15 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 77a29f33b56f..fb1b6184ddf2 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -1574,7 +1574,6 @@ static void chv_enable_pll(struct intel_crtc *crtc) struct drm_i915_private *dev_priv = dev->dev_private; int pipe = crtc->pipe; enum dpio_channel port = vlv_pipe_to_channel(pipe); - int dpll = DPLL(crtc->pipe); u32 tmp; assert_pipe_disabled(dev_priv, crtc->pipe); @@ -1594,20 +1593,21 @@ static void chv_enable_pll(struct intel_crtc *crtc) udelay(1); /* Enable PLL */ - tmp = I915_READ(dpll); - tmp |= DPLL_VCO_ENABLE; - I915_WRITE(dpll, tmp); + I915_WRITE(DPLL(pipe), crtc->config.dpll_hw_state.dpll); /* Check PLL is locked */ - if (wait_for(((I915_READ(dpll) & DPLL_LOCK_VLV) == DPLL_LOCK_VLV), 1)) + if (wait_for(((I915_READ(DPLL(pipe)) & DPLL_LOCK_VLV) == DPLL_LOCK_VLV), 1)) DRM_ERROR("PLL %d failed to lock\n", pipe); + /* not sure when this should be written */ + I915_WRITE(DPLL_MD(pipe), crtc->config.dpll_hw_state.dpll_md); + POSTING_READ(DPLL_MD(pipe)); + /* Deassert soft data lane reset*/ tmp = vlv_dpio_read(dev_priv, pipe, VLV_PCS_DW0(port)); tmp |= (DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET); vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW0(port), tmp); - mutex_unlock(&dev_priv->dpio_lock); } @@ -1699,14 +1699,17 @@ static void vlv_disable_pll(struct drm_i915_private *dev_priv, enum pipe pipe) static void chv_disable_pll(struct drm_i915_private *dev_priv, enum pipe pipe) { - int dpll = DPLL(pipe); u32 val; - /* Set PLL en = 0 */ - val = I915_READ(dpll); - val &= ~DPLL_VCO_ENABLE; - I915_WRITE(dpll, val); + /* Make sure the pipe isn't still relying on us */ + assert_pipe_disabled(dev_priv, pipe); + /* Set PLL en = 0 */ + val = DPLL_SSC_REF_CLOCK_CHV; + if (pipe != PIPE_A) + val |= DPLL_INTEGRATED_CRI_CLK_VLV; + I915_WRITE(DPLL(pipe), val); + POSTING_READ(DPLL(pipe)); } void vlv_wait_port_ready(struct drm_i915_private *dev_priv, @@ -5511,7 +5514,14 @@ static void chv_update_pll(struct intel_crtc *crtc) u32 bestn, bestm1, bestm2, bestp1, bestp2, bestm2_frac; int refclk; - mutex_lock(&dev_priv->dpio_lock); + crtc->config.dpll_hw_state.dpll = DPLL_SSC_REF_CLOCK_CHV | + DPLL_REFA_CLK_ENABLE_VLV | DPLL_VGA_MODE_DIS | + DPLL_VCO_ENABLE; + if (pipe != PIPE_A) + crtc->config.dpll_hw_state.dpll |= DPLL_INTEGRATED_CRI_CLK_VLV; + + crtc->config.dpll_hw_state.dpll_md = + (crtc->config.pixel_multiplier - 1) << DPLL_MD_UDI_MULTIPLIER_SHIFT; bestn = crtc->config.dpll.n; bestm2_frac = crtc->config.dpll.m2 & 0x3fffff; @@ -5523,9 +5533,10 @@ static void chv_update_pll(struct intel_crtc *crtc) /* * Enable Refclk and SSC */ - val = I915_READ(dpll_reg); - val |= (DPLL_SSC_REF_CLOCK_CHV | DPLL_REFA_CLK_ENABLE_VLV); - I915_WRITE(dpll_reg, val); + I915_WRITE(dpll_reg, + crtc->config.dpll_hw_state.dpll & ~DPLL_VCO_ENABLE); + + mutex_lock(&dev_priv->dpio_lock); /* Propagate soft reset to data lane reset */ val = vlv_dpio_read(dev_priv, pipe, VLV_PCS_DW0(port)); -- 2.20.1