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Commit f64a28a7 authored by Jesse Barnes's avatar Jesse Barnes Committed by Daniel Vetter
Browse files

drm/i915/vlv: fixup DDR freq detection per Punit spec 



Either the docs were wrong or the values have changed since the old days
before we had wheels.

Reported-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: default avatarJesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent 586f49dc

drivers/gpu/drm/i915/intel_pm.c

+10 −3
Original line number Diff line number Diff line
@@ -5319,15 +5319,22 @@ static void valleyview_init_clock_gating(struct drm_device *dev) 
	mutex_unlock(&dev_priv->rps.hw_lock);

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

	case 0:

	case 1:

		dev_priv->mem_freq = 800;

		break;

	case 2:

	case 1:

		dev_priv->mem_freq = 1066;

		break;

	case 3:

	case 2:

		dev_priv->mem_freq = 1333;

		break;

	case 3:

		/*

		 * Probably a BIOS/Punit bug, or a new platform we don't

		 * support yet.

		 */

		WARN(1, "invalid DDR freq detected, assuming 800MHz\n");

		dev_priv->mem_freq = 800;

		break;

	}

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