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drm/i915: decouple gen9 and gen10 dp signal levels.

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Let's decouple bxt, glk and cnl dp signal levels
from other DDIs to avoid confusion.

No functional change. Only a reorg to avoid messing
with currently working DP signal levels when
moving voltage swing sequences around to match spec.

v2: ddi_signal_levels is also called from other ddi
    platforms, so don't remove IS_GEN9_BC check from
    skl_ddi_set_iboos. (Ville).

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170829232230.23051-2-rodrigo.vivi@intel.com
This commit is contained in:
Rodrigo Vivi
2017-08-29 16:22:24 -07:00
parent 1b6e2fd289
commit d509af6c85
3 changed files with 23 additions and 15 deletions
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10
drivers/gpu/drm/i915/intel_dp.c
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@@ -3506,13 +3506,11 @@ intel_dp_set_signal_levels(struct intel_dp *intel_dp)
uint32_t signal_levels, mask = 0;
uint8_t train_set = intel_dp->train_set[0];
if (HAS_DDI(dev_priv)) {
if (IS_GEN9_LP(dev_priv) || IS_CANNONLAKE(dev_priv)) {
signal_levels = bxt_signal_levels(intel_dp);
} else if (HAS_DDI(dev_priv)) {
signal_levels = ddi_signal_levels(intel_dp);
if (IS_GEN9_LP(dev_priv) || IS_CANNONLAKE(dev_priv))
signal_levels = 0;
else
mask = DDI_BUF_EMP_MASK;
mask = DDI_BUF_EMP_MASK;
} else if (IS_CHERRYVIEW(dev_priv)) {
signal_levels = chv_signal_levels(intel_dp);
} else if (IS_VALLEYVIEW(dev_priv)) {