From: Wenjing Liu <wenjing.liu@xxxxxxx>
[how]
Implement a function that determines link encoding format
based on the link settings passed in.
Signed-off-by: Wenjing Liu <wenjing.liu@xxxxxxx>
Reviewed-by: George Shen <George.Shen@xxxxxxx>
Acked-by: Stylon Wang <stylon.wang@xxxxxxx>
---
drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 7 +++++++
drivers/gpu/drm/amd/display/dc/dc_dp_types.h | 5 +++++
drivers/gpu/drm/amd/display/dc/inc/dc_link_dp.h | 1 +
3 files changed, 13 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
index 69d511717828..396ac89a3c0e 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
@@ -4870,4 +4870,11 @@ bool is_edp_ilr_optimization_required(struct dc_link *link, struct dc_crtc_timin
return false;
}
+enum dp_link_encoding dp_get_link_encoding_format(const struct dc_link_settings *link_settings)
+{
+ if ((link_settings->link_rate >= LINK_RATE_LOW) &&
+ (link_settings->link_rate <= LINK_RATE_HIGH3))
+ return DP_8b_10b_ENCODING;
+ return DP_UNKNOWN_ENCODING;
+}
diff --git a/drivers/gpu/drm/amd/display/dc/dc_dp_types.h b/drivers/gpu/drm/amd/display/dc/dc_dp_types.h
index fcfde2e04292..1948cd9427d7 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_dp_types.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_dp_types.h
@@ -98,6 +98,11 @@ enum dc_dp_training_pattern {
DP_TRAINING_PATTERN_VIDEOIDLE,
};
+enum dp_link_encoding {
+ DP_UNKNOWN_ENCODING = 0,
+ DP_8b_10b_ENCODING = 1,
+};
+
struct dc_link_settings {
enum dc_lane_count lane_count;
enum dc_link_rate link_rate;
diff --git a/drivers/gpu/drm/amd/display/dc/inc/dc_link_dp.h b/drivers/gpu/drm/amd/display/dc/inc/dc_link_dp.h
index 428842511c03..ffc3f2c63db8 100644
--- a/drivers/gpu/drm/amd/display/dc/inc/dc_link_dp.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/dc_link_dp.h
@@ -105,4 +105,5 @@ enum link_training_result dp_check_link_loss_status(
struct dc_link *link,
const struct link_training_settings *link_training_setting);
+enum dp_link_encoding dp_get_link_encoding_format(const struct dc_link_settings *link_settings);
#endif /* __DC_LINK_DP_H__ */
--
2.25.1
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