diff options
| author | Jesse Barnes <jbarnes@virtuousgeek.org> | 2013-11-04 16:07:00 -0800 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-11-05 19:29:01 +0100 |
| commit | f64a28a7c5ab2fc342326de9e126acf3cc0f91d6 (patch) | |
| tree | a8449559e09c86fbb2fcf65b6952df76820a6e69 /drivers/gpu/drm/i915/intel_pm.c | |
| parent | 586f49dc781314f1e6b1133f6d966d670c219a67 (diff) | |
| download | lwn-f64a28a7c5ab2fc342326de9e126acf3cc0f91d6.tar.gz lwn-f64a28a7c5ab2fc342326de9e126acf3cc0f91d6.zip | |
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: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_pm.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_pm.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 13afd54ca6e9..a5778e59cc15 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -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); |