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drm/tegra: dp: Track link capabilities alongside settings

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Store capabilities in max_* fields and add separate fields for the
currently selected settings.

Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Thierry Reding
2015-07-21 16:33:48 +02:00
parent 1abd6b3304
commit c728e2d4a6
4 changed files with 39 additions and 28 deletions
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16
drivers/gpu/drm/tegra/dp.c
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@@ -14,9 +14,12 @@ static void drm_dp_link_reset(struct drm_dp_link *link)
return;
link->revision = 0;
link->rate = 0;
link->num_lanes = 0;
link->max_rate = 0;
link->max_lanes = 0;
link->capabilities = 0;
link->rate = 0;
link->lanes = 0;
}
/**
@@ -42,12 +45,15 @@ int drm_dp_link_probe(struct drm_dp_aux *aux, struct drm_dp_link *link)
return err;
link->revision = values[0];
link->rate = drm_dp_bw_code_to_link_rate(values[1]);
link->num_lanes = values[2] & DP_MAX_LANE_COUNT_MASK;
link->max_rate = drm_dp_bw_code_to_link_rate(values[1]);
link->max_lanes = values[2] & DP_MAX_LANE_COUNT_MASK;
if (values[2] & DP_ENHANCED_FRAME_CAP)
link->capabilities |= DP_LINK_CAP_ENHANCED_FRAMING;
link->rate = link->max_rate;
link->lanes = link->max_lanes;
return 0;
}
@@ -131,7 +137,7 @@ int drm_dp_link_configure(struct drm_dp_aux *aux, struct drm_dp_link *link)
int err;
values[0] = drm_dp_link_rate_to_bw_code(link->rate);
values[1] = link->num_lanes;
values[1] = link->lanes;
if (link->capabilities & DP_LINK_CAP_ENHANCED_FRAMING)
values[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN;