Re: [PATCH 4/4] drm/i915: Change CHV SKU400 GPU freq divider to 10

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On Tuesday 11 November 2014 02:25 AM, ville.syrjala@xxxxxxxxxxxxxxx wrote:
From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>

According to "Cherryview_GFXclocks_y14w36d1.xlsx" the GPU frequency
divider should be 10 in when the CZ clock is 400 MHz. Change the code
to agree so that we report the correct frequencies.

Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
  drivers/gpu/drm/i915/intel_pm.c | 3 ++-
  1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 0f5c391..b73506f 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -7292,8 +7292,9 @@ static int vlv_gpu_freq_div(unsigned int czclk_freq)
  		return 12;
  	case 320:
  	case 333:
-	case 400:
  		return 16;
+	case 400:
+		return 20;
  	default:
  		return -1;
  	}

right latest spec as div is 20

Reviewed-by: Deepak S <deepak.s@xxxxxxxxxxxxxxx>

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