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drm/i915/edp: clean up code and comments around eDP DPCD read

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Some minor drive-by cleanups.

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171026142932.17737-2-jani.nikula@intel.com
This commit is contained in:
Jani Nikula
2017-10-26 17:29:32 +03:00
parent 0501a3b0eb
commit e6ed2a1b99
1 changed files with 7 additions and 3 deletions
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10
drivers/gpu/drm/i915/intel_dp.c
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@@ -3747,11 +3747,11 @@ intel_edp_init_dpcd(struct intel_dp *intel_dp)
if (drm_dp_dpcd_read(&intel_dp->aux, DP_EDP_DPCD_REV,
intel_dp->edp_dpcd, sizeof(intel_dp->edp_dpcd)) ==
sizeof(intel_dp->edp_dpcd))
DRM_DEBUG_KMS("EDP DPCD : %*ph\n", (int) sizeof(intel_dp->edp_dpcd),
DRM_DEBUG_KMS("eDP DPCD: %*ph\n", (int) sizeof(intel_dp->edp_dpcd),
intel_dp->edp_dpcd);
/* Intermediate frequency support */
if (intel_dp->edp_dpcd[0] >= 0x03) { /* eDp v1.4 or higher */
/* Read the eDP 1.4+ supported link rates. */
if (intel_dp->edp_dpcd[0] >= DP_EDP_14) {
__le16 sink_rates[DP_MAX_SUPPORTED_RATES];
int i;
@@ -3775,6 +3775,10 @@ intel_edp_init_dpcd(struct intel_dp *intel_dp)
intel_dp->num_sink_rates = i;
}
/*
* Use DP_LINK_RATE_SET if DP_SUPPORTED_LINK_RATES are available,
* default to DP_MAX_LINK_RATE and DP_LINK_BW_SET otherwise.
*/
if (intel_dp->num_sink_rates)
intel_dp->use_rate_select = true;
else