From 2445966ee80837116498bd83084ad6d28272320c Mon Sep 17 00:00:00 2001 From: Jesse Barnes Date: Thu, 2 May 2013 10:48:08 -0700 Subject: [PATCH] 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: Jesse Barnes Reviewed-by: Ben Widawsky Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_pm.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 0f4b46e94932..556b9892bb92 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -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"); -- GitLab