This is required to return the index of link rate into
common_rates array. This gets used to retry the link
training at lower link rate.
Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
Cc: Daniel Vetter <daniel.vetter@xxxxxxxxx>
Cc: Ville Syrjala <ville.syrjala@xxxxxxxxxxxxxxx>
Signed-off-by: Manasi Navare <manasi.d.navare@xxxxxxxxx>
---
drivers/gpu/drm/i915/intel_dp.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 6b54b0e..a60bef8 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -288,6 +288,21 @@ static int intel_dp_common_rates(struct intel_dp *intel_dp,
common_rates);
}
+static int intel_dp_link_rate_index(struct intel_dp *intel_dp, int *common_rates,
+ int link_rate)
+{
+ int common_len;
+ int index;
+
+ common_len = intel_dp_common_rates(intel_dp, common_rates);
+ for (index = 0; index < common_len; index++) {
+ if (link_rate == common_rates[common_len - index - 1])
+ return common_len - index - 1;
+ }
+
+ return -1;
+}
+
static enum drm_mode_status
intel_dp_mode_valid(struct drm_connector *connector,
struct drm_display_mode *mode)
--
1.9.1
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