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Commit 2445966e authored by Jesse Barnes's avatar Jesse Barnes Committed by Daniel Vetter
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drm/i915: go back to switch for VLV mem freq detection v2 



Both the docs and the existing code were wrong.  So fix both and use a
switch statement like we do elsewhere to make things simple & clear.

Signed-off-by: default avatarJesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: default avatarBen Widawsky <ben@bwidawsk.net>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent 177006a1

drivers/gpu/drm/i915/intel_pm.c

+12 −1
Original line number Diff line number Diff line
@@ -2902,7 +2902,18 @@ static void valleyview_enable_rps(struct drm_device *dev) 
		   GEN7_RC_CTL_TO_MODE);



	valleyview_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS, &val);

	dev_priv->mem_freq = 800 + (266 * (val >> 6) & 3);

	switch ((val >> 6) & 3) {

	case 0:

	case 1:

		dev_priv->mem_freq = 800;

		break;

	case 2:

		dev_priv->mem_freq = 1066;

		break;

	case 3:

		dev_priv->mem_freq = 1333;

		break;

	}

	DRM_DEBUG_DRIVER("DDR speed: %d MHz", dev_priv->mem_freq);



	DRM_DEBUG_DRIVER("GPLL enabled? %s\n", val & 0x10 ? "yes" : "no");