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drm/i915: fix link rates reported for SKL

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This patch fixes the bug that SKL SKUs before B0 might return
HBR2 as supported even though it is not supposed to be enabled
on such platforms.

v2: optimize if else condition (Jani)

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Sivakumar Thulasimani <sivakumar.thulasimani@intel.com>
[Jani: minor whitespace fix.]
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
This commit is contained in:
Thulasimani,Sivakumar 2015-08-18 11:07:59 +05:30 committed by Jani Nikula
parent 6cc38acaaa
commit af7080f555
1 changed files with 11 additions and 8 deletions
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19
drivers/gpu/drm/i915/intel_dp.c
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@ -1223,21 +1223,24 @@ static bool intel_dp_source_supports_hbr2(struct drm_device *dev)
static int
intel_dp_source_rates(struct drm_device *dev, const int **source_rates)
{
int size;
if (IS_BROXTON(dev)) {
*source_rates = bxt_rates;
return ARRAY_SIZE(bxt_rates);
size = ARRAY_SIZE(bxt_rates);
} else if (IS_SKYLAKE(dev)) {
*source_rates = skl_rates;
return ARRAY_SIZE(skl_rates);
size = ARRAY_SIZE(skl_rates);
} else {
*source_rates = default_rates;
size = ARRAY_SIZE(default_rates);
}
*source_rates = default_rates;
/* This depends on the fact that 5.4 is last value in the array */
if (intel_dp_source_supports_hbr2(dev))
return (DP_LINK_BW_5_4 >> 3) + 1;
else
return (DP_LINK_BW_2_7 >> 3) + 1;
if (!intel_dp_source_supports_hbr2(dev))
size--;
return size;
}
static void