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drm/i915/chv: Fix CHV PLL state tracking 

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 <ville.syrjala@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ville Syrjälä 2014-04-09 13:28:57 +03:00 committed by Daniel Vetter
parent 9418c1f176
commit a11b07039d
1 changed files with 26 additions and 15 deletions
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41
drivers/gpu/drm/i915/intel_display.c
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@ -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));