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drm/i915/dp: limit sink rates based on rate 

Get rid of redundant intel_dp_num_rates(). We can simply look at the
rate and limit based on that.

Cc: Manasi Navare <manasi.d.navare@intel.com>
Reviewed-by: <manasi.d.navare@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171009092959.29021-3-jani.nikula@intel.com
This commit is contained in:
Jani Nikula 2017-10-09 12:29:59 +03:00
parent fc603ca7f8
commit a8a08886ef
1 changed files with 7 additions and 19 deletions
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26
drivers/gpu/drm/i915/intel_dp.c
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@ -137,32 +137,20 @@ static void vlv_steal_power_sequencer(struct drm_device *dev,
enum pipe pipe);
static void intel_dp_unset_edid(struct intel_dp *intel_dp);
static int intel_dp_num_rates(u8 link_bw_code)
{
switch (link_bw_code) {
default:
WARN(1, "invalid max DP link bw val %x, using 1.62Gbps\n",
link_bw_code);
case DP_LINK_BW_1_62:
return 1;
case DP_LINK_BW_2_7:
return 2;
case DP_LINK_BW_5_4:
return 3;
}
}
/* update sink rates from dpcd */
static void intel_dp_set_sink_rates(struct intel_dp *intel_dp)
{
int i, num_rates;
int i, max_rate;
num_rates = intel_dp_num_rates(intel_dp->dpcd[DP_MAX_LINK_RATE]);
max_rate = drm_dp_bw_code_to_link_rate(intel_dp->dpcd[DP_MAX_LINK_RATE]);
for (i = 0; i < num_rates; i++)
for (i = 0; i < ARRAY_SIZE(default_rates); i++) {
if (default_rates[i] > max_rate)
break;
intel_dp->sink_rates[i] = default_rates[i];
}
intel_dp->num_sink_rates = num_rates;
intel_dp->num_sink_rates = i;
}
/* Theoretical max between source and sink */