Initialize lock detect threshold and select coarse threshold if M2 is
zero
Signed-off-by: Vijay Purushothaman <vijay.a.purushothaman@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_display.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 87d1721..ae2a77f 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6085,11 +6085,22 @@ static void chv_prepare_pll(struct intel_crtc *crtc,
dpio_val |= (2 << DPIO_CHV_FEEDFWD_GAIN_SHIFT);
vlv_dpio_write(dev_priv, pipe, CHV_PLL_DW3(port), dpio_val);
+ /* Program digital lock detect threshold */
+ dpio_val = vlv_dpio_read(dev_priv, pipe, CHV_PLL_DW9(port));
+ dpio_val |= (0x5 << DPIO_CHV_INT_LOCK_THRESHOLD_SHIFT);
+ vlv_dpio_write(dev_priv, pipe, CHV_PLL_DW9(port), dpio_val);
+
} else {
/* M2 fraction division disable */
dpio_val = vlv_dpio_read(dev_priv, pipe, CHV_PLL_DW3(port));
dpio_val &= ~(DPIO_CHV_FRAC_DIV_EN);
vlv_dpio_write(dev_priv, pipe, CHV_PLL_DW3(port), dpio_val);
+
+ /* Program digital lock detect threshold */
+ dpio_val = vlv_dpio_read(dev_priv, pipe, CHV_PLL_DW9(port));
+ dpio_val |= (0x5 << DPIO_CHV_INT_LOCK_THRESHOLD_SHIFT);
+ dpio_val |= DPIO_CHV_INT_LOCK_THRESHOLD_SEL_COARSE;
+ vlv_dpio_write(dev_priv, pipe, CHV_PLL_DW9(port), dpio_val);
}
/* Loop filter */
--
1.7.9.5
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