diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2017-10-24 11:52:15 +0200 |
|---|---|---|
| committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2017-10-25 12:47:08 +0200 |
| commit | 0c9f353f014e6d88a5af8b305503a5396fe63ff8 (patch) | |
| tree | 8dec0257b16a2dc2991bc2b6d6b3691a6bdd3389 /drivers/gpu/drm/i915/intel_cdclk.c | |
| parent | drm/i915: Adjust system agent voltage on CNL if required by DDI ports (diff) | |
| download | linux-0c9f353f014e6d88a5af8b305503a5396fe63ff8.tar.xz linux-0c9f353f014e6d88a5af8b305503a5396fe63ff8.zip | |
drm/i915: Sanity check cdclk in vlv_set_cdclk()
chv_set_cdclk() sanity checks that the cdclk frequency is one of the
legal values. Do the same in the VLV function.
Cc: Mika Kahola <mika.kahola@intel.com>
Cc: Manasi Navare <manasi.d.navare@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171024095216.1638-10-ville.syrjala@linux.intel.com
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_cdclk.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_cdclk.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_cdclk.c b/drivers/gpu/drm/i915/intel_cdclk.c index 4ca4a34b7bfa..fedfe3c720b6 100644 --- a/drivers/gpu/drm/i915/intel_cdclk.c +++ b/drivers/gpu/drm/i915/intel_cdclk.c @@ -520,6 +520,18 @@ static void vlv_set_cdclk(struct drm_i915_private *dev_priv, int cdclk = cdclk_state->cdclk; u32 val, cmd = cdclk_state->voltage_level; + switch (cdclk) { + case 400000: + case 333333: + case 320000: + case 266667: + case 200000: + break; + default: + MISSING_CASE(cdclk); + return; + } + /* There are cases where we can end up here with power domains * off and a CDCLK frequency other than the minimum, like when * issuing a modeset without actually changing any display after |