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drm/i915: Hide the source vs. sink rate handling from intel_dp_compute_config() 

intel_dp_compute_config() only really needs to know the rates supported
by both source and sink, so hide the raw source and sink arrays from it.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Sonika Jindal <sonika.jindal@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ville Syrjälä 2015-03-12 17:10:33 +02:00 committed by Daniel Vetter
parent 1db10e28b2
commit 2ecae76ad6
1 changed files with 23 additions and 14 deletions
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37
drivers/gpu/drm/i915/intel_dp.c
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@ -1195,9 +1195,9 @@ intel_dp_set_clock(struct intel_encoder *encoder,
}
}
static int intel_supported_rates(const int *source_rates, int source_len,
const int *sink_rates, int sink_len,
int *supported_rates)
static int intersect_rates(const int *source_rates, int source_len,
const int *sink_rates, int sink_len,
int *supported_rates)
{
int i = 0, j = 0, k = 0;
@ -1216,6 +1216,21 @@ static int intel_supported_rates(const int *source_rates, int source_len,
return k;
}
static int intel_supported_rates(struct intel_dp *intel_dp,
int *supported_rates)
{
struct drm_device *dev = intel_dp_to_dev(intel_dp);
const int *source_rates, *sink_rates;
int source_len, sink_len;
sink_len = intel_dp_sink_rates(intel_dp, &sink_rates);
source_len = intel_dp_source_rates(dev, &source_rates);
return intersect_rates(source_rates, source_len,
sink_rates, sink_len,
supported_rates);
}
static int rate_to_index(int find, const int *rates)
{
int i = 0;
@ -1246,17 +1261,10 @@ intel_dp_compute_config(struct intel_encoder *encoder,
int max_clock;
int bpp, mode_rate;
int link_avail, link_clock;
const int *sink_rates;
int supported_rates[8] = {0};
const int *source_rates;
int source_len, sink_len, supported_len;
int supported_rates[DP_MAX_SUPPORTED_RATES] = {};
int supported_len;
sink_len = intel_dp_sink_rates(intel_dp, &sink_rates);
source_len = intel_dp_source_rates(dev, &source_rates);
supported_len = intel_supported_rates(source_rates, source_len,
sink_rates, sink_len, supported_rates);
supported_len = intel_supported_rates(intel_dp, supported_rates);
/* No common link rates between source and sink */
WARN_ON(supported_len <= 0);
@ -1355,7 +1363,8 @@ found:
if (INTEL_INFO(dev)->gen >= 9 && intel_dp->supported_rates[0]) {
intel_dp->rate_select =
rate_to_index(supported_rates[clock], sink_rates);
rate_to_index(supported_rates[clock],
intel_dp->supported_rates);
intel_dp->link_bw = 0;
}