[Intel-gfx] [PATCH 01/15] drm/i915: Always program m2 fractional value on CHV

[ville.syrjala at linux.intel.com]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

When fractional m2 divider isn't used on CHV the fractional part
is ignore by the hardware. Despite that, program the fractional
value (0 in this case) to the hardware register just to keep
things a bit more consistent. Might at least make register dumps
a bit less confusing when there isn't some stale fractional part
hanging around.

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 0b2ad76..3df9cb2 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -7393,8 +7393,7 @@ static void chv_prepare_pll(struct intel_crtc *crtc,
 			1 << DPIO_CHV_N_DIV_SHIFT);
 
 	/* M2 fraction division */
-	if (bestm2_frac)
-		vlv_dpio_write(dev_priv, pipe, CHV_PLL_DW2(port), bestm2_frac);
+	vlv_dpio_write(dev_priv, pipe, CHV_PLL_DW2(port), bestm2_frac);
 
 	/* M2 fraction division enable */
 	dpio_val = vlv_dpio_read(dev_priv, pipe, CHV_PLL_DW3(port));
-- 
2.3.6